CN118665168A

CN118665168A - Display equipment and transportation

Info

Publication number: CN118665168A
Application number: CN202310293328.6A
Authority: CN
Inventors: 王潇; 廖文哲; 李�根
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2024-09-20
Also published as: WO2024188007A1

Abstract

The embodiments of the present application provide a display device and a vehicle, which relate to the field of optical display technology. The display device can be installed in a vehicle, and the volume of the display device is smaller than that of the existing display device. In the display device, an image generation unit is used to generate a first image light and a second image light; a first optical device is used to receive the first image light, configure a first optical focal value for the first image light, generate a third image light, and couple the third image light from the coupling-in area of the optical waveguide into the optical waveguide; a second optical device is used to receive the second image light, configure a second optical focal value for the second image light, generate a fourth image light, and couple the fourth image light from the coupling-in area of the optical waveguide into the optical waveguide, and the first optical focal value is different from the second optical focal value; the optical waveguide is used to couple the third image light from the coupling-out area of the optical waveguide; and the optical waveguide is also used to couple the fourth image light from the coupling-out area of the optical waveguide.

Description

Display device and vehicle

Technical Field

The application relates to the technical field of light display, in particular to display equipment and a vehicle.

Background

With the development of vehicle intellectualization, head Up Displays (HUDs) are installed in more and more vehicles. The HUD can project the image comprising driving information to the front of the visual field of the driver, so that the driver can watch the image comprising driving information in front of the visual field while watching the road surface, the possibility that the driver looks at other devices arranged on the vehicle at low head in the driving process is reduced, and the driving safety of the driver is improved.

The HUD generally projects two images to display the instrument information and the navigation information respectively, wherein the size of the image comprising the instrument information is smaller, and the projection distance is short; the image including the navigation information is large in size and long in projection distance. Currently, HUDs that can project two images with different projection distances often have a large volume, but the space for installing the HUD is limited in a vehicle, and the HUD with a large volume is likely to be unable to be installed in the vehicle.

Disclosure of Invention

Embodiments of the present application provide a display device that may be installed in a vehicle, and a vehicle in which the display device is small in size compared to existing display devices.

In a first aspect, there is provided a display device comprising: an image generation unit and an optical imaging unit; the optical imaging unit comprises a first optical device, a second optical device and an optical waveguide; an image generation unit configured to generate first image light and second image light; a first optical device for receiving the first image light, configuring a first power value for the first image light, generating a third image light, coupling the third image light into the optical waveguide from a coupling-in region of the optical waveguide; a second optical device for receiving the second image light, configuring a second optical power value for the second image light, generating a fourth image light, coupling the fourth image light into the optical waveguide from the coupling-in region of the optical waveguide, the first optical power value being different from the second optical power value; an optical waveguide for coupling out the third image light from the coupling-out region of the optical waveguide; and an optical waveguide for coupling out the fourth image light from the coupling-out region of the optical waveguide. In the display device, an image generating unit is used for generating first image light and second image light, a first optical device in an optical imaging unit receives the first image light, a first focal power value is configured for the first image light, third image light is generated, the third image light is coupled in from a coupling-in area of an optical waveguide and coupled out from a coupling-out area of the optical waveguide, the third image light is reflected in the optical waveguide for multiple times, and the optical waveguide realizes the effects of folding a transmission light path of the third image light and amplifying the third image light, so that the third image light is imaged as a first image; the second optical device in the optical imaging unit receives the second image light, configures a second focal power value for the second image light, generates fourth image light, couples in from a coupling-in area of the optical waveguide, couples out from a coupling-out area of the optical waveguide, reflects the fourth image light in the optical waveguide for multiple times, and achieves the effects of folding a transmission light path of the fourth image light and amplifying the fourth image light, so that the fourth image light is imaged as a second image. Wherein the projection distance of the first image is inversely related to the first focal power value, the projection distance of the second image is inversely related to the second focal power value, and since the first focal power value is not equal to the second focal power value, the projection distance of the first image is different from the projection distance of the second image, and the display device can project two images with different projection distances. In addition, the first optical device and the second optical device in the display device are respectively arranged at one side of the coupling-in area of the optical waveguide, so that the size of the first optical device is irrelevant to the size of the diffusion of the third image light after passing through the optical waveguide, the size of the second optical device is irrelevant to the size of the diffusion of the fourth image light after passing through the optical waveguide, the volumes of the first optical device and the second optical device can be smaller, and the volume of the display device is further reduced.

Optionally, the first optical device comprises one or more of: lens, curved mirror. In this alternative, when the first optic comprises a lens, it may be that the optical power value of the lens is the first optical power value. The lens may be one or a plurality of lenses, and when the lens is one, the power value of the one lens is a first power value, and when the lens is a plurality of lenses, the power value of the plurality of lenses combined is a first power value. When the first optical device includes a curved mirror, the optical power value of the curved mirror may be a first optical power value. The number of the curved reflectors may be one or more, and when the number of the curved reflectors is one, the focal power value of the curved reflector is a first focal power value, and when the number of the curved reflectors is more, the focal power value of the curved reflectors after being combined is a first focal power value. The first optical device may be a combination of a lens and a curved mirror, and the optical power value of the lens and the curved mirror after the combination is a first optical power value, in which case the curved mirror may receive the first image light first and reflect the first image light to the lens; or the lens receives the first image light first and transmits the first image light to the curved reflector.

Optionally, the second optical device comprises one or more of: lens, curved mirror. In this alternative, when the second optic comprises a lens, it may be that the optical power value of the lens is the second optical power value. The lens may be one or a plurality of lenses, and when the lens is one, the power value of the one lens is the second power value, and when the lens is a plurality of lenses, the power value of the plurality of lenses combined is the second power value. When the second optical device includes a curved mirror, the optical power value of the curved mirror may be a second optical power value. The number of the curved reflectors may be one or more, and when the number of the curved reflectors is one, the focal power value of the curved reflector is a second focal power value, and when the number of the curved reflectors is more, the focal power value of the curved reflectors after being combined is a second focal power value. The second optical device may be a combination of a lens and a curved mirror, and the optical power value of the lens combined with the curved mirror is a second optical power value, in which case the curved mirror may receive the second image light first and reflect the second image light to the lens; or the lens receives the second image light first and transmits the second image light to the curved reflector.

Optionally, the optical waveguide comprises any one of: geometric optical waveguide, diffractive optical waveguide, holographic optical waveguide.

Optionally, the optical waveguide comprises a two-dimensional optical waveguide. In this alternative, the size of the coupling-in region of the two-dimensional optical waveguide is smaller than the size of the coupling-out region, and thus the size of the first optical device and the second optical device disposed on one side of the coupling-in region of the optical waveguide can be further reduced, further reducing the volume of the display device.

Optionally, the image generating unit includes a light modulator and a lens; the optical modulator comprises a first modulation region and a second modulation region; a first modulation region for generating first image light from the first image information; a second modulation region for generating second image light from the second image information; the lens is used for receiving the first image light generated by the first modulation area and transmitting the first image light to the first optical device; the lens is also used for receiving the second image light generated by the second modulation region and transmitting the second image light to the second optical device. In this alternative, the light modulator may produce the first image light and the second image light in regions.

Optionally, the image generating unit further comprises a light source; a light source for generating a light beam, transmitting the light beam to the light modulator; the first modulation area is specifically used for modulating the light beam according to the first image information to generate first image light; the second modulation area is specifically configured to modulate the light beam according to the second image information to generate second image light.

Optionally, the image generation unit further comprises an illumination element; a light source, in particular for transmitting a light beam to the lighting element; and the illumination element is used for shaping the light beam and transmitting the shaped light beam to the light modulator.

Optionally, the image generating unit further comprises a first reflective element; a light source, in particular for transmitting a light beam to the first reflective element; a first reflective element for reflecting the light beam to the light modulator.

Optionally, the image generating unit further comprises a second reflective element; the lighting element is specifically used for transmitting the shaped light beam to the second reflecting element; and a second reflecting element for reflecting the light beam to the light modulator.

Optionally, the image generating unit further comprises a display screen; the display screen comprises a first display area and a second display area; the lens is specifically used for transmitting the first image light to a first display area of the display screen; a first display area for displaying the first image light in a first predetermined angular distribution; a first display area for transmitting the first image light to the first optical device; the lens is also specifically used for transmitting second image light to a second display area of the display screen; a second display area for displaying second image light in a second predetermined angular distribution; the second display area is also used for transmitting second image light to the second optical device.

Optionally, the image generating unit further comprises a third reflective element; a lens, in particular for transmitting the first image light to the third reflective element; a third reflective element for reflecting the first image light to a first display area of the display screen; the lens is also specifically used for transmitting the second image light to the third reflecting element; and a third reflecting element for reflecting the second image light to a second display area of the display screen.

Optionally, the display device further comprises a processor; a processor for transmitting first image information to a first modulation region of the light modulator; the processor is further configured to send second image information to a second modulation region of the light modulator.

In a second aspect, there is provided a display device including: an image generation unit and an optical imaging unit; the optical imaging unit comprises an optical device, a predetermined reflecting element and an optical waveguide; an image generation unit configured to generate first image light and second image light; a predetermined reflection element for receiving the first image light and reflecting the first image light to the optical device; an optical device for configuring an optical power value for the first image light, generating a third image light, coupling the third image light into the optical waveguide from a coupling-in region of the optical waveguide; the optical device is also used for receiving the second image light, configuring an optical power value for the second image light, generating fourth image light and coupling the fourth image light into the optical waveguide from the coupling-in area of the optical waveguide; an optical waveguide for coupling out the third image light from the coupling-out region of the optical waveguide; and an optical waveguide for coupling out the fourth image light from the coupling-out region of the optical waveguide. In the display device, an image generating unit is used for generating first image light and second image light, a preset reflecting element in an optical imaging unit is used for receiving the first image light and reflecting the first image light to an optical device, the optical device is used for configuring an optical power value for the first image light and generating third image light, the third image light is coupled in from a coupling-in area of an optical waveguide and coupled out from a coupling-out area of the optical waveguide, the third image light is reflected in the optical waveguide for multiple times, the optical waveguide realizes the effects of folding a transmission light path of the third image light and amplifying the third image light, and further the third image light is imaged as the first image; the optical device in the optical imaging unit receives the second image light, configures an optical power value for the second image light, generates fourth image light, couples in from a coupling-in area of the optical waveguide, couples out from a coupling-out area of the optical waveguide, reflects the fourth image light in the optical waveguide for multiple times, and achieves the effects of folding a transmission light path of the fourth image light and amplifying the fourth image light, so that the fourth image light is imaged as a second image. Wherein, although the fixed optical device is the same as the optical power value of the first image light and the second image light, the second image light is directly transmitted to the optical device, the first image light is reflected to the optical device by the predetermined reflection element, so that the transmission path of the first image light to the optical device is longer than the transmission path of the second image light to the optical device, and then the projection distance of the image formed by the third image light is longer than the projection distance of the image formed by the fourth image light, the display device can project two images with different projection distances. In addition, the optical device and the preset reflecting element in the display device are arranged on one side of the coupling-in area of the optical waveguide, so that the size of the optical device is irrelevant to the size of the diffusion of the third image light after passing through the optical waveguide and the size of the diffusion of the fourth image light after passing through the optical waveguide, the volume of the optical device can be smaller, and the volume of the display device is further reduced.

Optionally, the predetermined reflective element comprises one or more of: a reflecting mirror and a reflecting prism.

Optionally, the optical device comprises one or more of: lens, curved mirror.

Optionally, the optical waveguide comprises any one of: one-dimensional geometric optical waveguide, one-dimensional diffraction optical waveguide a one-dimensional holographic optical waveguide.

Optionally, the geometric optical waveguide comprises a two-dimensional geometric optical waveguide; the diffractive optical waveguide includes a two-dimensional diffractive optical waveguide; the holographic optical waveguide comprises a two-dimensional holographic optical waveguide.

Optionally, the image generating unit includes a light modulator and a lens; the optical modulator comprises a first modulation region and a second modulation region; a first modulation region for generating first image light from the first image information; a second modulation region for generating second image light from the second image information; a lens for receiving the first image light generated by the first modulation region and transmitting the first image light to a predetermined reflection element; the lens is also used for receiving the second image light generated by the second modulation area and transmitting the second image light to the optical device.

Optionally, the image generating unit further comprises a display screen; the display screen comprises a first display area and a second display area; the lens is specifically used for transmitting the first image light to a first display area of the display screen; a first display area for displaying the first image light in a first predetermined angular distribution; a first display area for transmitting the first image light to a predetermined reflection element; the lens is also specifically used for transmitting second image light to a second display area of the display screen; a second display area for displaying second image light in a second predetermined angular distribution; the second display area is also used for transmitting second image light to the optical device.

In a third aspect, there is provided a vehicle comprising a display device as claimed in any one of the first or second aspects above, the display device being mounted on the vehicle.

Optionally, the vehicle further comprises a windscreen for receiving the third image light exiting through the display device, reflecting the third image light to the eyes of a driver of the vehicle; a windshield also for receiving the fourth image light exiting through the display device and reflecting the fourth image light to the eyes of the driver of the vehicle.

In a fourth aspect, there is provided a display device including: an image generation unit and an optical imaging unit; the optical imaging unit comprises an optical device and an optical waveguide; an image generation unit configured to generate first image light; an optical device for receiving the first image light, configuring an optical power value for the first image light, generating a second image light, coupling the second image light into the optical waveguide from a coupling-in region of the optical waveguide; and an optical waveguide for coupling out the second image light from the coupling-out region of the optical waveguide. In the display device, the image generating unit is used for generating first image light, the optical device in the optical imaging unit receives the first image light, the focal power value is configured for the first image light, second image light is generated, the second image light is coupled in from the coupling-in area of the optical waveguide and coupled out from the coupling-out area of the optical waveguide, the optical waveguide realizes folding of the transmission light path of the second image light, and then the second image light is imaged into a preset image. The display device may project two images with different projection distances, for example, at a first moment, the image generating unit is configured to generate first image light, an optical device in the optical imaging unit receives the first image light, configures a first focal power value for the first image light, generates second image light, the second image light is coupled in from a coupling-in area of the optical waveguide, is coupled out from a coupling-out area of the optical waveguide, the second image light is reflected in the optical waveguide for multiple times, and the optical waveguide realizes the effects of folding a transmission light path of the second image light and amplifying the second image light, so that the second image light is imaged as the first image; at a second moment, the image generating unit is used for generating third image light, an optical device in the optical imaging unit receives the third image light, a second focal power value is configured for the third image light, fourth image light is generated, the fourth image light is coupled in from a coupling-in area of the optical waveguide and coupled out from a coupling-out area of the optical waveguide, the fourth image light is reflected in the optical waveguide for multiple times, and the optical waveguide achieves the effects of folding a transmission light path of the fourth image light and amplifying the fourth image light, so that the fourth image light is imaged as a second image. In addition, the optical device in the display device is arranged at one side of the coupling-in area of the optical waveguide, so that the size of the optical device is irrelevant to the diffusion size of the second image light after passing through the optical waveguide, the volume of the optical device can be smaller, and the volume of the display device is further reduced.

Optionally, the optical device comprises one or more of: lens, curved mirror.

Optionally, the optical waveguide comprises a geometric optical waveguide.

Optionally, the image generating unit includes a light modulator and a lens; a light modulator for generating first image light from the image information; and the lens is used for receiving the first image light generated by the light modulator and transmitting the first image light to the optical device.

Optionally, the image generating unit further comprises a light source; a light source for generating a light beam, transmitting the light beam to the light modulator; the light modulator is specifically configured to modulate the light beam according to the image information to generate first image light.

Optionally, the image generating unit further comprises a display screen; the lens is specifically used for transmitting the first image light to the display screen; the display screen is used for displaying the first image light according to the preset angle distribution; the display screen is also used for transmitting the first image light to the optical device.

Optionally, the image generating unit further comprises a third reflective element; a lens specifically configured to transmit the first image light to a third reflective element; and a third reflecting element for reflecting the first image light to the display screen.

Optionally, the display device further comprises a processor; and a processor for transmitting the image information to the light modulator.

In a fifth aspect, there is provided a vehicle comprising a display device as in any one of the fourth aspects above, the display device being mounted on the vehicle.

Optionally, the vehicle further comprises a windscreen for receiving the second image light exiting through the display device, reflecting the second image light to the eyes of the driver of the vehicle.

The technical effects of any possible implementation manner of the second aspect and the fifth aspect may be referred to the technical effects of the implementation manner of the first aspect, which are not described herein.

Drawings

FIG. 1 is a schematic illustration of a head-up display installed in a vehicle according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an image generating unit in a display device according to an embodiment of the present application;

Fig. 4 is a schematic structural view of an image generating unit in a display device according to another embodiment of the present application;

Fig. 5 is a schematic structural view of an image generating unit in a display device according to still another embodiment of the present application;

fig. 6 is a schematic structural diagram of an image generating unit in a display device according to still another embodiment of the present application;

Fig. 7 is a schematic structural diagram of an image generating unit in a display device according to another embodiment of the present application;

fig. 8 is a schematic structural view of an optical device in a display apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural view of an optical device in a display apparatus according to another embodiment of the present application;

Fig. 10 is a schematic structural view of an optical waveguide in a display device according to an embodiment of the present application;

fig. 11 is a schematic structural view of an optical waveguide in a display device according to another embodiment of the present application;

Fig. 12 is a schematic structural view of an optical waveguide in a display device according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a display device according to another embodiment of the present application;

Fig. 14 is a schematic structural diagram of a display device according to another embodiment of the present application;

fig. 15 is a schematic structural view of an image generating unit in a display device according to another embodiment of the present application;

fig. 16 is a schematic structural view of an image generating unit in a display device according to still another embodiment of the present application;

fig. 17 is a schematic diagram of the structure of an image generating unit in a display device according to still another embodiment of the present application;

fig. 18 is a schematic structural view of an image generating unit in a display device according to another embodiment of the present application;

fig. 19 is a schematic structural view of an image generating unit in a display device according to still another embodiment of the present application;

fig. 20 is a schematic circuit diagram of a display device according to an embodiment of the present application;

FIG. 21 is a schematic view of a vehicle according to an embodiment of the present application;

Fig. 22 is a functional schematic of a vehicle according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c or a, b and c, wherein a, b and c can be single or multiple. In addition, in the embodiments of the present application, the words "first", "second", and the like do not limit the number and order.

Furthermore, in the present application, directional terms "upper", "lower", etc. are defined with respect to the orientation in which the components are schematically disposed in the drawings, and it should be understood that these directional terms are relative concepts, which are used for description and clarity with respect thereto, and which may be changed accordingly in accordance with the change in the orientation in which the components are disposed in the drawings.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Along with the development of vehicle intellectualization, head Up Display (HUD) is arranged in more and more vehicles, the HUD can project images comprising driving information onto the front helmet or windshield of a driver, so that the HUD enables the driver to watch images comprising driving information in front of a visual field while watching a road surface, the possibility that the driver looks at other devices arranged on the vehicle at low head in the driving process is avoided, and the driving safety of the driver is improved.

The HUD is used for projecting two images for displaying the instrument information and the navigation information respectively, wherein the instrument information comprises conventional parameter information related to vehicles such as speed, oil quantity and/or electric quantity, water temperature and the like, the size of the image projected by the HUD, comprising the instrument information, is smaller, and the projection distance is between 2 meters and 3 meters; the navigation information provides convenience for a driver to drive the vehicle, and the HUD projects an image comprising the navigation information, which is large in size and has a projection distance of 7.5 meters to 10 meters.

Referring to fig. 1, an embodiment of the present application provides a schematic representation of a HUD installed in a vehicle, the vehicle including a windshield 16. The HUD installed in the vehicle may project two images for displaying meter information and navigation information, respectively, wherein the HUD includes an image generating unit (picture generating unit, PGU) 11, PGU12, mirror 13, mirror 14, and mirror 15. In order to enable the HUD to be better installed in a vehicle, a dust cover and a bracket for supporting the dust cover are generally provided to form a receiving cavity, and PGU11, PGU12, mirror 13, mirror 14 and mirror 15 are disposed in the receiving cavity.

Illustratively, the PGU11 is configured to generate first image light including meter information, and the PGU11 transmits the generated first image light to the mirror 14, the first image light is reflected by the mirror 14 for the first time, reflected by the mirror 15 for the second time, and transmitted to the windshield 16 of the vehicle, reflected by the windshield 16 to the eyes 17 of the driver, the eyes 17 of the driver receive the first image light to view the image F1 formed by the first image light, the image F1 is specifically a virtual image, and a distance between the image F1 and the eyes 17 of the driver is a virtual image distance, wherein the virtual image distance is also referred to as a projection distance, the projection distance of the image F1 is positively correlated with a distance of the first image light transmitted from the PGU11 to the eyes 17 of the driver, and the projection distance of the image F1 is positively correlated with a size of the virtual image F1. The PGU12 is configured to generate second image light including navigation information, and the PGU12 transmits the generated second image light to the mirror 13, the second image light is reflected by the mirror 13 for the first time, reflected by the mirror 14 for the second time, reflected by the mirror 15 for the third time, and transmitted to the windshield 16 of the vehicle, reflected by the windshield 16 to the eyes 17 of the driver, the eyes 17 of the driver receive the second image light to view an image F2 formed by the second image light, the image F2 is specifically a virtual image, and a distance between the image F2 and the eyes 17 of the driver is a virtual image distance, wherein the virtual image distance is also referred to as a projection distance, the projection distance of the image F2 is positively correlated with a distance of the second image light transmitted from the PGU12 to the eyes 17 of the driver, and the projection distance of the image F2 is positively correlated with a size of the virtual image F2.

As shown in fig. 1, the reflecting mirror 14 and the reflecting mirror 15 implement folding of the transmission optical paths of the first image light and the second image light, and in some embodiments, at least one of the reflecting mirror 14 and the reflecting mirror 15 is a curved reflecting mirror, and the curved reflecting mirror can implement configuring optical power for the first image light and the second image light. Referring to fig. 1, both the first image light and the second image light pass through the windshield 16, the mirror 15 and the mirror 14, but the first image light is directly transmitted from the PGU11 to the mirror 14, the second image light is transmitted from the PGU12 to the mirror 14 through the mirror 13, the distance of the first image light transmitted from the PGU11 to the eyes 17 of the driver is smaller than the distance of the second image light transmitted from the PGU12 to the eyes 17 of the driver, and thus the projection distance of the image F1 is smaller than the projection distance of the image F2, and the size of the image F1 is smaller than the size of the image F2.

It can be seen that in the HUD shown in fig. 1, there are many reflective devices required to project two images with different projection distances, and the HUD shown in fig. 1 increases the projection distance of the image F2 by providing the reflective mirror, so when the projection distance of the image projected by the HUD shown in fig. 1 is required to be greater, more reflective mirrors are required to be provided in the HUD shown in fig. 1, and the volume of the HUD is further increased. In addition, the size of the mirror 14 needs to be larger so that the first image light and the second image light are reflected at different positions of the mirror 14, the size of the mirror 15 needs to be larger so that the first image light and the second image light are reflected at different positions of the mirror 15, and the volume of the HUD is increased continuously.

However, the space left in the vehicle for installing the HUD is limited, and the bulky HUD shown in fig. 1 may not be installed in the vehicle.

Exemplary, referring to fig. 2, an embodiment of the present application provides a display device that is small compared to the display device shown in fig. 1.

Referring to fig. 2, the display device 20 includes an image generating unit 30, an optical imaging unit 40.

The image generating unit 30 is for generating the image light S1 and the image light S2, for example. Wherein, when the display device 20 is installed in a vehicle, the image light S1 includes meter information, then the meter information can be displayed according to the image imaged by the image light S1, the image light S2 includes navigation information, and then the navigation information can be displayed according to the image imaged by the image light S2; or the image light S1 includes navigation information, the image imaged according to the image light S1 may display navigation information, the image light S2 includes meter information, and the image imaged according to the image light S2 may display meter information.

The image generating unit 30 transmits the image light S1 and the image light S2 to the optical imaging unit 40.

An optical imaging unit 40 for imaging in accordance with the image light S1.

Wherein the optical imaging unit 40 comprises an optical device 41, an optical device 42 and an optical waveguide 43, the optical waveguide 43 comprising an in-coupling region 431 and an out-coupling region 432.

Specifically, the image light S1 generated by the image generating unit 30 is transmitted to the optical imaging unit 40, the optical device 41 in the optical imaging unit 40 is configured to receive the image light S1, configure the focal power value D1 for the image light S1, and generate the image light S3, then the image light S3 has the focal power value D1, and according to the relationship d=1/F between the focal power D and the focal length F, it is known that the focal length of the image light S3 is 1/D1, where the image light S3 is imaged as a first image, the projection distance of the first image is positively correlated with the focal length of the image light S3, the projection distance of the first image is negatively correlated with the focal power D of the image light S3, and when the focal power value D1 is determined, the projection distance of the first image is also determined. The optical device 41 couples the image light S3 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43.

The optical waveguide 43 is used for coupling out the image light S3 from the coupling-out area 432 of the optical waveguide 43, and further imaging the image as a first image.

The image light S2 generated by the image generating unit 30 is transmitted to the optical device 42, the optical device 42 is used for receiving the image light S2, the focal power value D2 is configured for the image light S2, and the image light S4 is generated, then, the image light S4 has the focal power value D2, according to the relation d=1/F between the focal power D and the focal length F, the focal length of the image light S4 is 1/D2, wherein, according to the imaging of the image light S4 as the second image, the projection distance of the second image is positively correlated with the focal length of the image light S4, the projection distance of the second image is negatively correlated with the focal power D of the image light S4, and when the focal power value D2 is determined, the projection distance of the second image is also determined. Wherein the optical device 42 couples the image light S4 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43. Wherein the optical power D1 is not equal to the optical power D2, and therefore the projection distance of the first image is not equal to the projection distance of the second image.

The optical waveguide 43 is used for coupling out the image light S4 from the coupling-out area 432 of the optical waveguide 43, and then imaging the image as a second image.

In the display device 20 shown in fig. 2, the image generating unit 30 is configured to generate the image light S1 and the image light S2, the optical device 41 in the optical imaging unit 40 receives the image light S1, configures the optical power value D1 for the image light S1, generates the image light S3, couples the image light S3 from the coupling region of the optical waveguide 43, reflects the image light S3 multiple times in the optical waveguide 43, and the optical waveguide 43 achieves the effects of folding the transmission optical path of the image light S3 and amplifying the image light S3, so that the image light S3 is imaged as the first image; the optical device 42 in the optical imaging unit 40 receives the image light S2, configures an optical power value D2 for the image light S2, generates image light S4, couples in the image light S4 from a coupling-in area of the optical waveguide 43, couples out the image light S4 from a coupling-out area of the optical waveguide 43, reflects the image light S4 multiple times in the optical waveguide 43, and the optical waveguide 43 achieves the effects of folding a transmission optical path of the image light S4 and amplifying the image light S4, so that the image light S4 is imaged as a second image. Wherein the projection distance of the first image is inversely related to the optical power value D1, the projection distance of the second image is inversely related to the optical power value D2, and since the optical power value D1 is not equal to the optical power value D2, the projection distance of the first image is different from the projection distance of the second image, and the display device 20 can project two images with different projection distances. In addition, the optical device 41 and the optical device 42 in the display apparatus 20 are respectively disposed on one side of the coupling region of the optical waveguide 43, so that the size of the optical device 41 is irrelevant to the size of the image light S3 diffusing after passing through the optical waveguide 43, the size of the optical device 42 is irrelevant to the size of the image light S4 diffusing after passing through the optical waveguide 43, and the volumes of the optical device 41 and the optical device 42 can be made smaller, thereby reducing the volume of the display apparatus 20.

Here, the image light S3 and the image light S4 are diffused when transmitted through the optical waveguide 43. Illustratively, when the optical device 41 is disposed on one side of the coupling-out region of the optical waveguide 43, since diffusion occurs when the image light S3 is transmitted in the optical waveguide 43, it is necessary to set the volume of the optical device 41 to be slightly larger to receive the diffused image light S3.

As an example, referring to fig. 3, an embodiment of the present application provides a schematic structural diagram of an image generating unit 30, where the image generating unit 30 includes a light modulator 31 and a lens 32, where the light modulator 31 is configured to generate image light S1 and image light S2 according to image information, specifically, the light modulator 31 includes a modulation area 310 and a modulation area 311, and the image information includes image information M1 and image information M2, specifically, a processor in the image generating unit 30 transmits the image information to the light modulator 31. Wherein the modulation region 310 is used for generating the image light S1 according to the image information M1, and the modulation region 311 is used for generating the image light S2 according to the image information M2. The light modulator 31 includes any one of an organic light-emitting diode (OLED), a silicon-based OLED (Micro-OLED), a Micro-light-emitting diode (Micro-LED), and a sub-millimeter light-emitting diode (MINI LIGHT-emitting diode). The light modulator 31 shown in fig. 3 does not need an additional light source to provide light, the light modulator 31 shown in fig. 3 emits light, the light modulator 31 includes a liquid crystal layer, wherein a modulation area 310 in the light modulator 31 is used for adjusting a deflection direction of liquid crystal in the liquid crystal layer corresponding to the modulation area 310 according to received image information M1, so as to realize modulation of the light modulator 31 emitting light, generate image light S1, and the image light S1 includes the image information M1; the modulation region 311 in the light modulator 31 is configured to adjust a deflection direction of the liquid crystal in the liquid crystal layer corresponding to the modulation region 311 according to the received image information M2, so as to implement self-luminous modulation of the light modulator 31, and generate image light S2, where the image light S2 includes the image information M2. The light modulator 31 can realize the division generation of the image light S1 and the image light S2.

The lens 32 is for receiving the image light S1 generated by the modulation region 310 of the light modulator 31, transmitting the image light S1 to the optical device 41 in the optical imaging unit 40 shown in fig. 2, and the lens 32 is also for receiving the image light S2 generated by the modulation region 311 of the light modulator 31, transmitting the image light S2 to the optical device 42 in the optical imaging unit 40 shown in fig. 2. Wherein the lens 32 comprises one or more lenses.

By way of example, referring to fig. 4, an embodiment of the present application provides a schematic structural diagram of another image generating unit 30, wherein the image generating unit shown in fig. 4 further comprises a light source 33 as compared to the image generating unit 30 shown in fig. 3, wherein the light source 33 is configured to generate a light beam for transmission to the light modulator 31. The modulation region 310 in the light modulator 31 is specifically configured to modulate the light beam emitted from the light source 33 according to the image information M1 to generate the image light S1, and the modulation region 311 in the light modulator 31 is specifically configured to modulate the light beam emitted from the light source 33 according to the image information M2 to generate the image light S2. Therefore, the light modulator 31 shown in fig. 4 cannot emit light, and the light modulator 31 is specifically a transmissive light modulator, the light modulator 31 includes a transmissive Liquid Crystal Display (LCD) and the light modulator 31 includes a liquid crystal layer, the modulation region 310 controls the liquid crystal molecule deflection in the liquid crystal layer corresponding to the modulation region 310 according to the image information M1, so as to modulate the light beam transmitted from the light source 33 to the modulation region 310 of the light modulator 31, and generate the image light S1, where the image light S1 includes the image information M1; the modulation region 311 controls the deflection of liquid crystal molecules in the liquid crystal layer corresponding to the modulation region 311 according to the image information M2 to realize the modulation of the light beam transmitted from the light source 33 to the modulation region 311 of the light modulator 31, and generates image light S2, the image light S2 including the image information M2.

Illustratively, referring to fig. 4, the image generating unit 30 further includes an illumination element 34, where, on a transmission path of the light beam generated by the light source 33, the illumination element 34 is located between the light source 33 and the light modulator 31, the illumination element 34 includes one or more lenses, and the illumination element 34 is configured to shape the light beam emitted by the light source 33 and transmit the shaped light beam to the light modulator 31. Illustratively, the purpose of the lighting element 34 shaping the light beam emitted by the light source 33 is to: so that the shaped light beam can be transmitted to the modulation region 310 and the modulation region 311 of the light modulator 31; so that the angle of incidence of the shaped light beam transmitted to the light modulator 31 meets the requirements of the light modulator 31. Wherein the requirements of different light modulators 31 for the angle of incidence of the light beam are different.

Illustratively, referring to fig. 5, the image generating unit 30 shown in fig. 5 further includes a reflective element R1, as compared to the image generating unit 30 shown in fig. 4. When the image generating unit 30 includes the illumination element 34, on a transmission optical path of the light beam generated by the light source 33, the reflection element R1 is located between the illumination element 34 and the light modulator 31, and the reflection element R1 is configured to receive the light beam emitted from the illumination element 34 and reflect the light beam to the modulation region 310 and the modulation region 311 of the light modulator 31; when the image generating unit 30 does not include the illumination element 34, on a transmission optical path of the light beam generated by the light source 33, the reflection element R1 is located between the illumination element 34 and the light modulator 31, and the reflection element R1 is configured to receive the light beam emitted from the light source 33 and reflect the light beam to the modulation region 310 and the modulation region 311 of the light modulator 31. The optical modulator 31 shown in fig. 5 is specifically a reflective optical modulator, and the optical modulator 31 includes a digital micro-mirror device (DMD), a liquid crystal on silicon (liquid crystal on silicon, LCOS), and a micro electro-mechanical system (micro electro MECHANICAL SYSTEMS, MEMS).

As an example, referring to fig. 6, compared to the image generating unit 30 shown in fig. 5, the image generating unit shown in fig. 6 further includes a display screen 35, wherein the display screen 35 is specifically a transmissive display screen, the display screen includes a display area 350 and a display area 351, the lens 32 is specifically configured to transmit the image light S1 to the display area 350 of the display screen 35, the display area 350 of the display screen 35 is configured to receive the image light S1, display the image light S1 according to a first predetermined angular distribution, and the display area 350 of the display screen 35 is also configured to transmit the image light S1 to the optical device 41 in the optical imaging unit 40 shown in fig. 2; the lens 32 is further specifically configured to transmit the image light S2 to the display area 351 of the display screen 35, the display area 351 of the display screen 35 is configured to receive the image light S2, display the image light S2 according to a second predetermined angular distribution, and the display area 351 of the display screen 35 is further configured to transmit the image light S2 to the optical device 42 in the optical imaging unit 40 shown in fig. 2.

For example, referring to fig. 7, compared to the image generating unit 30 shown in fig. 6, the image generating unit shown in fig. 7 further includes a reflective element R2, wherein the display 35 is specifically a reflective display, the lens 32 is specifically configured to transmit the image light S1 to the reflective element R2, and the reflective element R2 is configured to receive the image light S1 and reflect the image light S1 to the display area 350 of the display 35; the lens 32 is further specifically configured to transmit the image light S2 to the reflective element R2, and the reflective element R2 is further configured to receive the image light S2 emitted from the lens 32 and reflect the image light S2 to the display area 351 of the display screen 35.

The light modulator 31 shown in fig. 6 or fig. 7 is illustratively a reflective light modulator, and in other embodiments, the light modulator shown in fig. 6 or fig. 7 may be a transmissive light modulator as shown in fig. 5, which is not limited by the embodiments of the present application.

Illustratively, in the image generating unit 30 shown in any one of fig. 3 to 7, the image information M1 received by the light modulator 31 may be meter information, the image light S1 includes the meter information, the image information M2 received by the light modulator 31 may be navigation information, and the image light S2 includes the navigation information; or the image information M1 received by the light modulator 31 may be navigation information, the image light S1 includes navigation information, the image information M2 received by the light modulator 31 may be meter information, and the image light S2 includes meter information. The embodiment of the present application is not limited to the image information, and when the display device 20 shown in fig. 2 is a display device in an optical table display, the image information M1 and the image information M2 received by the optical modulator 31 may be any of two different display information.

The image light S1 generated by the image generating unit 30 is transmitted to the optical imaging unit 40. Wherein the optics 41 in the optical imaging unit 40 first receives the image light S1. Wherein the optics 41 comprise one or more of: lens, curved mirror.

Illustratively, the optical device 41 is configured to receive the image light S1, configure the optical power value D1 for the image light S1, and generate the image light S3. Referring to fig. 8, where the optical device 41 includes a lens, the optical power value of the lens may be D1. The number of lenses may be one or plural, and when the number of lenses is one, the power value of the one lens is D1, and when the number of lenses is plural, the power value of the plurality of lenses combined is D1. Referring to fig. 9, when the optical device 41 includes a curved mirror, the optical power value of the curved mirror may be D1. The number of the curved mirrors may be one or a plurality, and when the number of the curved mirrors is one, the focal power value of the curved mirror is D1, and when the number of the curved mirrors is a plurality, the focal power value of the curved mirrors after the combination of the plurality of the curved mirrors is D1. For example, the optical device 41 may be a combination of a lens and a curved mirror, and the optical power value of the lens combined with the curved mirror is D1, in this case, the curved mirror may receive the image light S1 first and reflect the image light S1 to the lens; or the lens receives the image light S1 first and transmits the image light S1 to the curved mirror.

The optical imaging unit 40 further comprises an optical waveguide 43. Wherein the optical device 41 generates the image light S3, the optical device 41 couples the image light S3 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43, and the optical waveguide 43 is used for coupling out the image light S3 from the coupling-out region 432 of the optical waveguide 43.

The image light S2 generated by the image generating unit 30 is transmitted to the optical imaging unit 40. Wherein the optics 42 in the optical imaging unit 40 first receives the image light S2. Wherein the optics 42 comprise one or more of: lens, curved mirror.

Illustratively, the optical device 42 is configured to receive the image light S2, configure the optical power value D2 for the image light S2, and generate the image light S4. Referring to fig. 8, where the optic 42 includes a lens, it may be that the lens has a power value D2. The number of lenses may be one or plural, and when the number of lenses is one, the power value of the one lens is D2, and when the number of lenses is plural, the power value of the plurality of lenses combined is D2. Referring to fig. 9, when the optical device 42 includes a curved mirror, the optical power value of the curved mirror may be D1. The number of the curved mirrors may be one or a plurality, and when the number of the curved mirrors is one, the focal power value of the curved mirror is D2, and when the number of the curved mirrors is a plurality, the focal power value of the curved mirrors after the combination of the plurality of the curved mirrors is D2. For example, the optical device 42 may be a combination of a lens and a curved mirror, and the optical power value of the lens combined with the curved mirror is D2, in this case, the curved mirror may receive the image light S2 first and reflect the image light S2 to the lens; or the lens receives the image light S2 first and transmits the image light S2 to the curved mirror.

The optical imaging unit 40 further comprises an optical waveguide 43. Wherein the optical device 42 generates the image light S4, the optical device 42 couples the image light S4 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43, and the optical waveguide 43 is used for coupling the image light S4 out from the coupling-out region 432 of the optical waveguide 43.

Specifically, the image light S3 is coupled into the optical waveguide 43 from a first region of the coupling-in region 431 of the optical waveguide 43, and the image light S4 is coupled into the optical waveguide 43 from a second region of the coupling-in region 431 of the optical waveguide 43, the first region and the second region not overlapping. The image light S3 is coupled out from the third region of the coupling-out region 432 of the optical waveguide 43, and the image light S4 is coupled out from the fourth region of the coupling-out region 432 of the optical waveguide 43, which may or may not overlap, as in the embodiment of the application, this is not a limitation.

The optical waveguide 43 includes a geometric optical waveguide shown in fig. 10, a diffraction optical waveguide shown in fig. 11, and a hologram optical waveguide shown in fig. 12.

Referring to fig. 10, an embodiment of the present application provides a schematic structural view of a geometric light guide, where the geometric light guide includes a prism waveguide 4301 and a planar waveguide 4302 as shown in (a) of fig. 10, where the prism waveguide 4301 generally serves as a coupling-in region 431 of the geometric light guide, and the planar waveguide 4302 includes a plurality of waveguide sheets arranged in an array, where the plurality of waveguide sheets are arranged in an array in a left-to-right direction with reference to an arrangement direction of the geometric light guide as shown in (a) of fig. 10, where a left side surface (and/or a right side surface) of any one of the waveguide sheets is coated such that a portion of light transmitted through the left side surface (and/or the right side surface) of the waveguide sheet is transmitted, and another portion is reflected, and a refractive index and a reflective index of each of the plurality of waveguide sheets arranged in the array are controlled by the coating, so that an effect that a light beam is coupled out in a predetermined region, that is a coupling-out region 432 of the geometric light guide, among the plurality of waveguide sheets arranged in the array is achieved.

Referring to fig. 10 (a), the optical device 41 couples image light S3 from the prism waveguide 4301 of the geometric optical waveguide into the geometric optical waveguide, the image light S3 is transmitted in the geometric optical waveguide, the left side surface (and/or the right side surface) of the plurality of waveguide sheets arrayed in the planar waveguide is reflected and/or transmitted, total reflection occurs on both the upper and lower surfaces of the planar waveguide, and thus is coupled out from a predetermined region of the planar waveguide 4302 of the geometric optical waveguide; the optical device 42 couples the image light S4 from the prism waveguide 4301 of the geometric optical waveguide into the geometric optical waveguide, the image light S4 is transmitted in the geometric optical waveguide, the left side surface (and/or the right side surface) of the plurality of waveguide sheets arrayed in the planar waveguide is reflected and/or transmitted, total reflection occurs on both the upper and lower surfaces of the planar waveguide, and thus, the image light S4 is coupled out from a predetermined region of the planar waveguide 4302 of the geometric optical waveguide.

Referring to fig. 10 (b), an embodiment of the present application provides another structure of a geometric optical waveguide, wherein the geometric optical waveguide includes a glass substrate 4303, a microstructure array Z1 and a microstructure array Z2 disposed on a surface of the glass substrate 4303, and the microstructure array Z1 and the microstructure array Z2 may be disposed on the same surface of the glass substrate 4303 or the microstructure array Z1 and the microstructure array Z2 may be disposed on different surfaces of the glass substrate 4303. The light exits from the glass substrate 4303 by arranging the microstructure array Z1 such that the transmission direction of the light transmitted to the microstructure array Z1 is deflected by a predetermined angle, such that the light is totally reflected in the glass substrate 4303, and then the light is transmitted to the microstructure array Z2, and by arranging the microstructure array Z2 such that the transmission direction of the light transmitted to the microstructure array Z2 is deflected by a predetermined angle. Thus, microstructure array Z1 and the region of glass substrate 4303 covered by microstructure array Z1 are referred to as the in-coupling region 431 of the geometric optical waveguide, and microstructure array Z2 and the region of glass substrate 4303 covered by microstructure array Z2 are referred to as the out-coupling region 432 of the geometric optical waveguide.

Referring to fig. 10 (b), the optical device 41 couples the image light S3 into the geometric light guide from the coupling-in region of the geometric light guide, the image light S3 is transmitted to the microstructure array Z1 in the coupling-in region of the geometric light guide, the microstructure array Z1 deflects the transmission direction of the image light S3 by a predetermined angle, and thus the image light S3 is totally reflected in the glass substrate 4303, and is transmitted to the microstructure array Z2, and the microstructure array Z2 deflects the transmission direction of the image light S3 by a predetermined angle, and thus is coupled out from the coupling-out region of the geometric light guide; the optical device 42 couples the image light S4 into the geometric light guide from the coupling-in region of the geometric light guide, the image light S4 is transmitted to the microstructure array Z1 in the coupling-in region of the geometric light guide, the microstructure array Z1 deflects the transmission direction of the image light S4 by a predetermined angle, so that the image light S4 is totally reflected in the glass matrix 4303 and transmitted to the microstructure array Z2, and the microstructure array Z2 deflects the transmission direction of the image light S4 by a predetermined angle, so that the image light S4 is coupled out from the coupling-out region of the geometric light guide.

Illustratively, in other embodiments, the geometric optical waveguide shown in (b) of fig. 10 may not be provided with the microstructure array Z1, and instead a prism waveguide may be provided as the coupling-in region of the geometric optical waveguide shown in (b) of fig. 10, which is not limited by the embodiment of the present application.

Referring to fig. 11, an embodiment of the present application provides a schematic structural diagram of a diffractive optical waveguide, where the diffractive optical waveguide includes a glass substrate 4303, a grating structure 4304 disposed on a surface of the glass substrate 4303, and a grating structure 4305 disposed on a surface of the glass substrate 4303, and the grating structure 4304 and the grating structure 4305 may be disposed on the same side of the glass substrate 4303 or the grating structure 4304 and the grating structure 4305 may be disposed on different sides of the glass substrate 4303. The grating structure 4304 may be formed by a semiconductor etching, nanoimprinting, or other technique, the grating structure 4305 may be formed by a semiconductor etching, nanoimprinting, or other technique, the grating period of the grating structure 4304 is set such that the transmission direction of the light transmitted to the grating structure 4304 is deflected by a predetermined angle, and then total reflection occurs in the glass substrate 4303 and is transmitted to the grating structure 4305, and the grating period of the grating structure 4305 is set such that the transmission direction of the light transmitted to the grating structure 4305 is deflected by a predetermined angle and is emitted from the glass substrate 4303. Thus, the grating structure 4304 and the area of the glass substrate 4303 covered by the grating structure 4304 are referred to as the coupling-in area 431 of the diffractive optical waveguide, and the area of the grating structure 4305 and the glass substrate 4303 covered by the grating structure 4305 are referred to as the coupling-out area 432 of the diffractive optical waveguide.

Referring to fig. 11, the optical device 41 couples the image light S3 into the diffractive optical waveguide from the coupling-in region of the diffractive optical waveguide, the image light S3 is transmitted to the grating structure 4304 in the coupling-in region of the diffractive optical waveguide, the grating structure 4304 deflects the transmission direction of the image light S3 by a predetermined angle, and thus the image light S3 is totally reflected in the glass substrate 4303 and transmitted to the grating structure 4305, and the grating structure 4305 deflects the transmission direction of the image light S3 by a predetermined angle and thus is coupled out from the coupling-out region of the diffractive optical waveguide; the optical device 42 couples the image light S4 into the diffractive optical waveguide from the coupling-in region of the diffractive optical waveguide, the image light S4 is transmitted to the grating structure 4304 in the coupling-in region of the diffractive optical waveguide, the grating structure 4304 deflects the transmission direction of the image light S4 by a predetermined angle, and thus the image light S4 is totally reflected in the glass substrate 4303 and transmitted to the grating structure 4305, and the grating structure 4305 deflects the transmission direction of the image light S4 by a predetermined angle, and thus is coupled out from the coupling-out region of the diffractive optical waveguide.

Referring to fig. 12, an embodiment of the present application provides a schematic structural diagram of a holographic optical waveguide, where the holographic optical waveguide includes a glass substrate 4303, and a holographic volume grating structure 4306 and a holographic volume grating structure 4307 are disposed on a surface of the glass substrate 4303, and by way of example, the holographic volume grating structure 4306 and the holographic volume grating structure 4307 may be disposed on the same surface of the glass substrate 4303, or the holographic volume grating structure 4306 and the holographic volume grating structure 4307 may be disposed on different surfaces of the glass substrate 4303. The method of fabricating the holographic volume grating structure 4306 and the holographic volume grating structure 4307 includes: the photosensitive material is coated, interference fringes are generated by two laser beams to expose the photosensitive material, and then refractive index difference occurs in the photosensitive material. The transmission direction of light transmitted to the holographic volume grating structure 4306 is deflected by a predetermined angle by setting a refractive index difference in the holographic volume grating structure 4306, and thus total reflection occurs in the glass substrate 4303, and transmitted to the holographic volume grating structure 4307, and the transmission direction of light transmitted to the holographic volume grating structure 4307 is deflected by a predetermined angle by setting a refractive index difference in the holographic volume grating structure 4307, and thus emitted from the glass substrate 4303. Therefore, the holographic volume grating structure 4306 and the area of the glass substrate 4303 covered by the holographic volume grating structure 4306 are referred to as the coupling-in area 431 of the holographic optical waveguide, and the holographic volume grating structure 4307 and the area of the glass substrate 4303 covered by the holographic volume grating structure 4307 are referred to as the coupling-out area 432 of the holographic optical waveguide.

Referring to fig. 12, the optical device 41 couples the image light S3 into the holographic optical waveguide from the coupling-in region 431 of the holographic optical waveguide, the image light S3 is transmitted to the holographic body grating structure 4306 in the coupling-in region of the holographic optical waveguide, the holographic body grating structure 4306 deflects the transmission direction of the image light S3 by a predetermined angle, and thus the image light S3 is totally reflected in the glass substrate 4303, and is transmitted to the holographic body grating structure 4307, and the holographic body grating structure 4307 deflects the transmission direction of the image light S3 by a predetermined angle, and thus is coupled out from the coupling-out region 432 of the holographic optical waveguide; the optics 42 couples the image light S4 into the holographic optical waveguide from the coupling-in region 431 of the holographic optical waveguide, the image light S4 is transmitted to the holographic volume grating structure 4306 in the coupling-in region of the holographic optical waveguide, the holographic volume grating structure 4306 deflects the transmission direction of the image light S4 by a predetermined angle, and thus the image light S4 is totally reflected in the glass matrix 4303, and transmitted to the holographic volume grating structure 4307, and the holographic volume grating structure 4307 deflects the transmission direction of the image light S4 by a predetermined angle, and thus is coupled out from the coupling-out region 432 of the holographic optical waveguide.

The optical waveguide 43 may be a one-dimensional optical waveguide or a two-dimensional optical waveguide, and the geometric optical waveguide may be a one-dimensional geometric optical waveguide or a two-dimensional geometric optical waveguide, and the diffraction optical waveguide may be a one-dimensional diffraction optical waveguide or a two-dimensional diffraction optical waveguide, and the holographic optical waveguide may be a one-dimensional holographic optical waveguide or a two-dimensional holographic optical waveguide, which is not limited by the embodiment of the present application. Illustratively, the image light can be diffused only in one direction in the one-dimensional optical waveguide, the image light can be diffused in two different directions in the two-dimensional optical waveguide, and the coupling-in area of the two-dimensional optical waveguide is smaller in size, so that when the optical waveguide 43 is a two-dimensional optical waveguide, the sizes of the optical device 41 and the optical device 42 provided on one side of the coupling-in area of the optical waveguide can be further reduced, and the volume of the display apparatus 20 can be further reduced.

By way of example, referring to fig. 13, an embodiment of the present application provides another display device 20, wherein the display device 20 includes an image generating unit 30, an optical imaging unit 40.

An optical imaging unit 40 for imaging in accordance with the image light S1.

Wherein the optical imaging unit 40 comprises an optical device 41, a predetermined reflective element 44 and an optical waveguide 43, the optical waveguide 43 comprising an in-coupling region 431 and an out-coupling region 432.

Specifically, the image light S1 generated by the image generating unit 30 is transmitted to the optical imaging unit 40, and a predetermined reflecting element 44 in the optical imaging unit 40 receives the image light S1 and reflects the image light S1 to the optical device 41. Wherein the predetermined reflecting element 44 includes one or more of a mirror, a reflecting prism, wherein the predetermined reflecting element 44 reflects the received image light S1 once to the optical device 41 when the predetermined reflecting element 44 includes one mirror; when the predetermined reflecting element 44 includes a plurality of reflecting mirrors, the predetermined reflecting element 44 reflects the received image light S1 to the optical device 41 a plurality of times. The optical device 41 is configured to configure an optical power value for the image light S1 to generate image light S3. Wherein the optical device 41 couples the image light S3 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43.

The image light S2 generated by the image generating unit 30 is transmitted to the optical imaging unit 40, and the optical device 41 in the optical imaging unit 40 is configured to receive the image light S2, configure a power value for the image light S2, and generate image light S4. Wherein the optical device 41 couples the image light S4 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43.

In the display device 20 shown in fig. 13, the optical device 41 includes one or more of the following: a lens and a curved mirror, wherein after the optical device 41 is determined, the focal power value of the optical device 41 can be determined, then the optical device 41 is the same as the focal power value configured by the image light S1 and the image light S2, but the image light S2 is directly transmitted to the optical device 41, and the image light S1 is reflected to the optical device 41 through the predetermined reflection element 44, so that the transmission path of the image light S1 to the optical device 41 is longer than the transmission path of the image light S2 to the optical device 41, and then the projection distance of the image formed by the image light S3 is longer than the projection distance of the image formed by the image light S4. The display device 20 may project two images having different projection distances.

The image generating unit 30 in fig. 13 may be the image generating unit 30 shown in any one of fig. 3 to 7, for example. When the image generating unit 30 in fig. 13 is specifically the image generating unit shown in any one of fig. 3 to 5, the lens 32 shown in any one of fig. 3 to 5 is configured to receive the image light S1 generated by the modulation region 310 of the light modulator 31, transmit the image light S1 to the predetermined reflection element 44 in the optical imaging unit 40 shown in fig. 13, and the lens 32 is also configured to receive the image light S2 generated by the modulation region 311 of the light modulator 31 and transmit the image light S2 to the optical device 41 in the optical imaging unit 40 shown in fig. 13. Wherein the lens 32 comprises one or more lenses.

When the image generating unit 30 in fig. 13 is specifically the image generating unit shown in fig. 6 or fig. 7, the lens 32 in fig. 6 or fig. 7 is specifically configured to transmit the image light S1 to the display area 350 of the display screen 35, the display area 350 of the display screen 35 is configured to receive the image light S1, display the image light S1 according to the first predetermined angular distribution, and the display area 350 of the display screen 35 is further configured to transmit the image light S1 to the predetermined reflection element 44 in the optical imaging unit 40 shown in fig. 13; the lens 32 is further specifically configured to transmit the image light S2 to the display area 351 of the display screen 35, the display area 351 of the display screen 35 is configured to receive the image light S2, display the image light S2 according to a second predetermined angular distribution, and the display area 351 of the display screen 35 is further configured to transmit the image light S2 to the optical device 41 in the optical imaging unit 40 shown in fig. 13.

By way of example, referring to fig. 14, an embodiment of the present application provides another display device 20, wherein the display device 20 includes an image generating unit 30, an optical imaging unit 40.

The image generation unit 30 is configured to generate image light S1.

The image generating unit 30 transmits the image light S1 to the optical imaging unit 40.

An optical imaging unit 40 for imaging in accordance with the image light S1.

Wherein the optical imaging unit 40 comprises an optical device 41 and an optical waveguide 43, the optical waveguide 43 comprising an in-coupling region 431 and an out-coupling region 432.

Specifically, the image light S1 generated by the image generating unit 30 is transmitted to the optical imaging unit 40, the optical device 41 in the optical imaging unit 40 is configured to receive the image light S1, configure the optical power value for the image light S1, generate the image light S3, and the optical device 41 couples the image light S3 from the coupling region 431 of the optical waveguide 43 into the optical waveguide 43.

Illustratively, in the display device 20 shown in fig. 14, at a first instant, the image generation unit 30 is configured to generate image light S1; the optical device 41 receives the image light S1, configures an optical power value D1 for the image light S1, generates image light S3, and couples the image light S3 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43; the optical waveguide 43 is used for coupling out the image light S3 from the coupling-out area 432 of the optical waveguide 43, and further imaging the image as a first image. At a second instant, the image generation unit 30 is adapted to generate image light S2; the optical device 41 receives the image light S2, configures an optical power value D2 for the image light S2, generates image light S4, and couples the image light S4 into the optical waveguide 43 from the coupling-in region 431 of the optical waveguide 43; the optical waveguide 43 is used for coupling out the image light S4 from the coupling-out area 432 of the optical waveguide 43, and then imaging the image as a second image. The display device 20 shown in fig. 14 can time-divisionally project two images having different projection distances.

As an example, referring to fig. 15, an embodiment of the present application provides a schematic structural diagram of an image generating unit 30, wherein the image generating unit 30 includes a light modulator 31 and a lens 32, wherein the light modulator 31 is configured to generate image light S1 according to image information, specifically, the image information includes image information M1 and image information M2, and specifically, a processor in the image generating unit 30 transmits the image information to the light modulator 31. Wherein at a first instant the light modulator 31 is arranged to generate image light S1 from the image information M1 and at a second instant the light modulator 31 is arranged to generate image light S2 from the image information M2. The light modulator 31 includes any one of an organic light-emitting diode (OLED), a silicon-based OLED (Micro-OLED), a Micro-light-emitting diode (Micro-LED), and a sub-millimeter light-emitting diode (MINI LIGHT-emitting diode). The light modulator 31 shown in fig. 15 does not need an additional light source to provide light, the light modulator 31 shown in fig. 3 emits light, the light modulator 31 includes a liquid crystal layer, wherein, at a first moment, the light modulator 31 is configured to adjust a deflection direction of the liquid crystal in the liquid crystal layer according to the received image information M1, so as to implement the modulation of the light modulator 31 to emit light, and generate image light S1, where the image light S1 includes the image information M1; at the second moment, the light modulator 31 is configured to adjust a deflection direction of the liquid crystal in the liquid crystal layer according to the received image information M2, so as to implement self-luminous modulation of the light modulator 31, and generate image light S2, where the image light S2 includes the image information M2.

At a first timing, the lens 32 is for receiving the image light S1 generated by the light modulator 31, and transmitting the image light S1 to the optical device 41 in the optical imaging unit 40 shown in fig. 14; at the second timing, the lens 32 is also used to receive the image light S2 generated by the light modulator 31, and transmit the image light S2 to the optical device 41 in the optical imaging unit 40 shown in fig. 14. Wherein the lens 32 comprises one or more lenses.

For example, referring to fig. 16, an embodiment of the present application provides a schematic structural diagram of another image generating unit 30, wherein the image generating unit shown in fig. 16 further comprises a light source 33 as compared to the image generating unit 30 shown in fig. 15, wherein the light source 33 is configured to generate a light beam, and to transmit the light beam to the light modulator 31. At the first moment, the light modulator 31 is specifically configured to modulate the light beam emitted from the light source 33 according to the image information M1 to generate the image light S1, and at the second moment, the light modulator 31 is specifically configured to modulate the light beam emitted from the light source 33 according to the image information M2 to generate the image light S2. Therefore, the light modulator 31 shown in fig. 16 cannot emit light, and the light modulator 31 is specifically a transmissive light modulator, the light modulator 31 includes a transmissive Liquid Crystal Display (LCD) and the light modulator 31 includes a liquid crystal layer, and at a first timing, the light modulator 31 controls the deflection of liquid crystal molecules in the liquid crystal layer according to the image information M1 to realize the modulation of the light beam transmitted from the light source 33 to the light modulator 31, and generates image light S1, the image light S1 including the image information M1; at the second moment, the light modulator 31 controls the deflection of the liquid crystal molecules in the liquid crystal layer according to the image information M2 to modulate the light beam transmitted to the light modulator 31 by the light source 33, generating the image light S2, and the image light S2 includes the image information M2.

As an example, referring to fig. 16, the image generating unit 30 further includes an illumination element 34, wherein the illumination element 34 is located between the light source 33 and the light modulator 31 on a transmission path of the light beam generated by the light source 33, the illumination element 34 includes one or more lenses, and the illumination element 34 is configured to shape the light beam emitted from the light source 33 and transmit the shaped light beam to the light modulator 31.

For example, referring to fig. 17, the image generating unit 30 shown in fig. 17 further includes a reflection element R1, as compared to the image generating unit 30 shown in fig. 16. When the image generating unit 30 includes the illumination element 34, on a transmission optical path of the light beam generated by the light source 33, the reflection element R1 is located between the illumination element 34 and the light modulator 31, and the reflection element R1 is configured to receive the light beam emitted from the illumination element 34 and reflect the light beam to the light modulator 31; when the image generating unit 30 does not include the illumination element 34, on a transmission optical path of the light beam generated by the light source 33, the reflection element R1 is located between the illumination element 34 and the light modulator 31, and the reflection element R1 is configured to receive the light beam emitted from the light source 33 and reflect the light beam to the light modulator 31. The optical modulator 31 shown in fig. 17 is specifically a reflective optical modulator, and the optical modulator 31 includes a digital micro-mirror device (DMD), a liquid crystal on silicon (liquid crystal on silicon, LCOS), and a micro electro-mechanical system (micro electro MECHANICAL SYSTEMS, MEMS).

As an example, referring to fig. 18, compared to the image generating unit 30 shown in fig. 17, the image generating unit shown in fig. 18 further includes a display screen 35, wherein the display screen 35 is specifically a transmissive display screen, the lens 32 is specifically configured to transmit the image light S1 to the display screen 35 at a first moment, the display area 350 of the display screen 35 is configured to receive the image light S1, display the image light S1 according to a first predetermined angular distribution, and the display screen 35 is further configured to transmit the image light S1 to the optical device 41 in the optical imaging unit 40 shown in fig. 14; at a second moment, the lens 32 is further specifically configured to transmit the image light S2 to the display screen 35, the display screen 35 is configured to receive the image light S2, display the image light S2 according to a second predetermined angular distribution, and the display screen 35 is further configured to transmit the image light S2 to the optical device 41 in the optical imaging unit 40 shown in fig. 14.

For example, referring to fig. 18, compared to the image generating unit 30 shown in fig. 17, the image generating unit shown in fig. 18 further includes a reflective element R2, wherein the display screen 35 is specifically a reflective display screen, and at the first moment, the lens 32 is specifically configured to transmit the image light S1 to the reflective element R2, and the reflective element R2 is configured to receive the image light S1 and reflect the image light S1 to the display screen 35; at the second moment, the lens 32 is further specifically configured to transmit the image light S2 to the reflective element R2, and the reflective element R2 is further configured to receive the image light S2 emitted from the lens 32 and reflect the image light S2 to the display screen 35.

Illustratively, the light modulator 31 shown in fig. 18 or 19 is specifically a reflective light modulator, and in other embodiments, the light modulator shown in fig. 18 or 19 may be a transmissive light modulator as shown in fig. 16, which is not limited by the embodiment of the present application.

Illustratively, in the image generating unit 30 shown in any one of fig. 15 to 19, the image information M1 received by the light modulator 31 may be meter information, the image light S1 includes the meter information, the image information M2 received by the light modulator 31 may be navigation information, and the image light S2 includes the navigation information; or the image information M1 received by the light modulator 31 may be navigation information, the image light S1 includes navigation information, the image information M2 received by the light modulator 31 may be meter information, and the image light S2 includes meter information. The embodiment of the present application is not limited to the image information, and when the display device 20 shown in fig. 2 is a display device in an optical table display, the image information M1 and the image information M2 received by the optical modulator 31 may be any of two different display information.

At the first timing, the image light S1 generated by the image generating unit 30 is transmitted to the optical imaging unit 40. Wherein the optics 41 in the optical imaging unit 40 first receives the image light S1. Wherein the optics 41 comprise one or more of: lens, curved mirror.

At the second timing, the image light S2 generated by the image generating unit 30 is transmitted to the optical imaging unit 40. Wherein the optics 41 in the optical imaging unit 40 first receive the image light S2. Wherein the optics 41 comprise one or more of: lens, curved mirror.

Illustratively, the optical device 41 is configured to receive the image light S2, configure the optical power value D2 for the image light S2, and generate the image light S4. Referring to fig. 8, where the optical device 41 includes a lens, the optical power value of the lens may be D2. The number of lenses may be one or plural, and when the number of lenses is one, the power value of the one lens is D2, and when the number of lenses is plural, the power value of the plurality of lenses combined is D2. Referring to fig. 9, when the optical device 41 includes a curved mirror, the optical power value of the curved mirror may be D1. The number of the curved mirrors may be one or a plurality, and when the number of the curved mirrors is one, the focal power value of the curved mirror is D2, and when the number of the curved mirrors is a plurality, the focal power value of the curved mirrors after the combination of the plurality of the curved mirrors is D2. For example, the optical device 41 may be a combination of a lens and a curved mirror, and the optical power value of the lens combined with the curved mirror is D2, in which case, the curved mirror may receive the image light S2 first and reflect the image light S2 to the lens; or the lens receives the image light S2 first and transmits the image light S2 to the curved mirror.

Specifically, the optics 41 shown in fig. 14 may be configured with different power values for different image lights at different times.

The optical waveguide 43 shown in fig. 14 includes the geometric optical waveguide shown in fig. 10, the diffraction optical waveguide shown in fig. 11, and the holographic optical waveguide shown in fig. 12, and the geometric optical waveguide may be a one-dimensional geometric optical waveguide or a two-dimensional geometric optical waveguide, the diffraction optical waveguide may be a one-dimensional diffraction optical waveguide or a two-dimensional diffraction optical waveguide, and the holographic optical waveguide may be a one-dimensional holographic optical waveguide or a two-dimensional holographic optical waveguide, which is not limited by the embodiment of the present application.

Referring to fig. 20, fig. 20 is a schematic circuit diagram of a display device 20 according to an embodiment of the present application. As shown in fig. 20, the circuits in the display device 20 mainly include a processor 1001, an internal memory 1002, an external memory interface 1003, an audio module 1004, a video module 1005, a power module 1006, a wireless communication module 1007, an i/O interface 1008, a video interface 1009, a controller area network (Controller Area Network, CAN) transceiver 1010, a display circuit 1028, an imaging device 1029, and the like. The processor 1001 and its peripheral elements, such as the internal memory 1002, the CAN transceiver 1010, the audio module 1004, the video module 1005, the power module 1006, the wireless communication module 1007, the i/O interface 1008, the video interface 1009, the CAN transceiver 1010, and the display circuit 1028, may be connected by a bus. The processor 1001 may be referred to as a front-end processor.

In addition, the circuit diagram illustrated in the embodiment of the present application does not constitute a specific limitation of the display device. In other embodiments of the application, the display device may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 1001 includes one or more processing units, for example: the Processor 1001 may include an application Processor (Application Processor, AP), a modem Processor, a graphics Processor (Graphics Processing Unit, GPU), an image signal Processor (IMAGE SIGNAL Processor, ISP), a controller, a video codec, a digital signal Processor (DIGITAL SIGNAL Processor, DSP), a baseband Processor, and/or a neural network Processor (Neural-Network Processing Unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

A memory may also be provided in the processor 1001 for storing instructions and data. Such as storing the operating system of the display device, AR Creator software package, etc. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may hold instructions or data that the processor 1001 has just used or recycled. If the processor 1001 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 1001 is reduced, thus improving the efficiency of the system.

In addition, if the display device in the present embodiment is mounted on a vehicle, the functions of the processor 1001 may be implemented by a domain controller on the vehicle.

In some embodiments, the display device may also include a plurality of Input/Output (I/O) interfaces 1008 coupled to the processor 1001. The interface 1008 may include, but is not limited to, an integrated circuit (Inter-INTEGRATED CIRCUIT, I2C) interface, an integrated circuit built-in audio (Inter-INTEGRATED CIRCUIT SOUND, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), a General-Purpose Input/Output (GPIO) interface, a subscriber identity module (Subscriber Identity Module, SIM) interface, and/or a universal serial bus (Universal Serial Bus, USB) interface, among others. The I/O interface 1008 may be connected to a mouse, a touch screen, a keyboard, a camera, a speaker/speaker, a microphone, etc., or may be connected to physical keys (e.g., a volume key, a brightness adjustment key, an on/off key, etc.) on a display device.

The internal memory 1002 may be used to store computer-executable program code that includes instructions. The memory 1002 may include a stored program area and a stored data area. The storage program area may store an application program (such as a call function, a time setting function, an AR function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the display device (e.g., phone book, world time, etc.), etc. In addition, the internal memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash memory (Universal Flash Storage, UFS), and the like. The processor 1001 performs various functional applications of the display device and data processing by executing instructions stored in the internal memory 1002 and/or instructions stored in a memory provided in the processor 1001.

The external memory interface 1003 may be used to connect to an external memory (for example, micro SD card), and the external memory may store data or program instructions as needed, and the processor 1001 may perform operations such as reading and writing on these data or program execution through the external memory interface 1003.

The audio module 1004 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 1004 may also be used to encode and decode audio signals, such as for playback or recording. In some embodiments, the audio module 1004 may be provided in the processor 1001, or a part of functional modules of the audio module 1004 may be provided in the processor 1001. The display device may implement audio functions through an audio module 1004, an application processor, and the like.

The Video interface 1009 may receive externally input audio and Video, which may specifically be a high-definition multimedia interface (High Definition Multimedia Interface, HDMI), a digital Video interface (Digital Visual Interface, DVI), a Video graphics array (Video GRAPHICS ARRAY, VGA), a Display Port (DP), a Low Voltage differential signal (Low Voltage DIFFERENTIAL SIGNALING, LVDS) interface, and the like, and the Video interface 1009 may further output Video. For example, the display device receives video data transmitted from the navigation system or video data transmitted from the domain controller through the video interface.

The video module 1005 may decode the video input by the video interface 1009, for example, h.264 decoding. The video module can also encode the video collected by the display device, for example, H.264 encoding is carried out on the video collected by the external camera. The processor 1001 may decode the video input from the video interface 1009 and output the decoded image signal to the display circuit.

Further, the display device further includes a CAN transceiver 1010, and the CAN transceiver 1010 may be connected to a CAN BUS (CAN BUS) of the automobile. Through the CAN bus, the display device CAN communicate with in-vehicle entertainment systems (music, radio, video modules), vehicle status systems, etc. For example, the user may turn on the in-vehicle music play function by operating the display device. The vehicle status system may send vehicle status information (doors, seat belts, etc.) to a display device for display.

The display circuit 1028 and the imaging device 1029 realize a function of displaying an image together. The display circuit 1028 receives the image information output from the processor 1001, processes the image information, and inputs the processed image information to the imaging device 1029 for imaging. The display circuit 1028 can also control an image displayed by the imaging device 1029. For example, parameters such as display brightness or contrast are controlled. The display circuit 1028 may include a driving circuit, an image control circuit, and the like.

The imaging device 1029 is configured to modulate a light beam input to the light source according to the input image information, thereby generating a visual image. The imaging device 1029 may be a liquid crystal on silicon panel, a liquid crystal display panel, or a digital micromirror device.

In this embodiment, the video interface 1009 may receive input video data (or referred to as a video source), the video module 1005 decodes and/or digitizes the input video data, and outputs an image signal to the display circuit 1028, and the display circuit 1028 drives the imaging device 1011 to image a light beam emitted by the light source according to the input image signal, so as to generate a visual image (emit imaging light).

The power module 1006 is configured to provide power to the processor 1001 and the light source based on input power (e.g., direct current), and the power module 1006 may include a rechargeable battery that may provide power to the processor 1001 and the light source. Light emitted from the light source may be transmitted to the imaging device 1029 for imaging, thereby forming an image light signal (imaging light).

In addition, the power module 1006 may be connected to a power module (e.g., a power battery) of the vehicle, which provides power to the power module 1006 of the display device.

The wireless Communication module 1007 may enable the display device to communicate wirelessly with the outside world, which may provide solutions for wireless Communication such as wireless local area networks (Wireless Local Area Networks, WLAN) (e.g., wireless fidelity (WIRELESS FIDELITY, wi-Fi) networks), bluetooth (BT), global navigation satellite systems (Global Navigation SATELLITE SYSTEM, GNSS), frequency modulation (Frequency Modulation, FM), near field Communication (NEAR FIELD Communication), infrared (IR), etc. The wireless communication module 1007 may be one or more devices that integrate at least one communication processing module. The wireless communication module 1007 receives electromagnetic waves via an antenna, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 1001. The wireless communication module 1007 may also receive signals to be transmitted from the processor 1001, frequency modulate them, amplify them, and convert them to electromagnetic waves for radiation via an antenna.

In addition, the video data decoded by the video module 1005 may be received wirelessly by the wireless communication module 1007 or read from the internal memory 1002 or the external memory, for example, the display device may receive video data from a terminal device or an in-vehicle entertainment system through a wireless lan in the vehicle, and the display device may also read audio/video data stored in the internal memory 1002 or the external memory, in addition to the video data input through the video interface 1009.

Referring to fig. 21, when the display device 20 is mounted on the vehicle 200, the vehicle 200 further includes a windshield 16, the windshield 16 for receiving the image light S3 emitted through the display device 20 and the image light S4, the windshield 16 reflecting the image light S3 to the eyes 17 of the driver of the vehicle so that the driver of the vehicle 200 sees an image F3 made of the image light S3, the image F3 being specifically a virtual image; the windshield 16 reflects the image light S4 to the eyes 17 of the driver of the vehicle so that the driver of the vehicle 200 sees an image F4 of the image light S4, the image F3 being in particular a virtual image, wherein the projection distance of the image F3 is different from the projection distance of the image F4.

Referring to fig. 22, fig. 22 is a functional schematic diagram of a vehicle 200 according to an embodiment of the application. The vehicle may include various subsystems such as a sensor system 210, a control system 220, one or more peripheral devices 230 (one shown as an example), a power supply 240, a computer system 250, and a display system 260, which may communicate with each other. The display system 260 may include a display device provided by an embodiment of the present application. The vehicle may also include other functional systems such as an engine system, a cabin, etc. that power the vehicle, as the application is not limited herein.

The sensor system 210 may include detection devices that sense the measured information and convert the sensed information into an electrical signal or other desired information output according to a certain rule. As shown in fig. 22, these detection devices may include, but are not limited to, a global positioning system (Global Positioning System, GPS), a vehicle speed sensor, an inertial measurement unit (Inertial Measurement Unit, IMU), a radar unit, a laser rangefinder, an image pickup device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and so forth.

The control system 220 may include several elements, such as a steering unit, a braking unit, a lighting system, an autopilot system, a map navigation system, a network timing system, and an obstacle avoidance system, as shown. The control system 220 may receive information (e.g., vehicle speed, vehicle distance, etc.) sent by the sensor system 210, and implement functions such as automatic driving, map navigation, etc.

Optionally, the control system 220 may further include elements such as a throttle controller and an engine controller for controlling the running speed of the vehicle, which is not limited by the present application.

Peripheral device 230 may include several elements such as a communication system, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used to enable network communication between the vehicle and other devices than the vehicle. In practical applications, the communication system may employ wireless communication technology or wired communication technology to enable network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, etc.

The power supply 240 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium battery or lead acid battery, or the like. In practical applications, one or more battery packs in the power supply are used to provide electrical energy or power for vehicle start-up, the type and materials of the power supply are not limiting of the application.

Several functions of the vehicle may be controlled by the computer system 250. Computer system 250 may include one or more processors 2501 (shown as one processor in the illustration) and memory 2502 (which may also be referred to as storage devices). In practical applications, the memory 2502 may be internal to the computer system 250 or external to the computer system 250, such as a cache in a vehicle, for example, and the application is not limited thereto.

The processor 2501 may include one or more general-purpose processors, such as a graphics processor (graphic processing unit, GPU), among others. The processor 2501 is operable to execute programs, or instructions corresponding to programs, stored in the memory 2502 to perform corresponding functions for the vehicle. The processor 2501 may also be referred to as a domain controller.

Memory 2502 may include volatile memory (RAM), such as: the memory may also include a non-volatile memory (non-volatile memory), such as ROM, flash memory (flash memory), HDD, or solid state disk SSD; memory 2502 may also include combinations of the above types of memory. The memory 2502 may be used to store a set of program codes or instructions corresponding to the program codes so that the processor 2501 invokes the program codes or instructions stored in the memory 2502 to implement the corresponding functions of the vehicle. In the present application, the memory 2502 may store a set of program codes for vehicle control, and the processor 2501 may invoke the program codes to control the safe driving of the vehicle, and how to achieve the safe driving of the vehicle will be described in detail below.

Alternatively, the memory 2502 may store information such as road maps, driving routes, sensor data, and the like, in addition to program code or instructions. The computer system 250 may implement the relevant functions of the vehicle in combination with other elements in the functional framework schematic of the vehicle, such as sensors in the sensor system, GPS, etc. For example, the computer system 250 may control the direction of travel or the speed of travel of the vehicle, etc., based on data input from the sensor system 210, and the application is not limited.

The display system 260 may interact with other systems within the vehicle, for example, it may display navigation information sent by the control system 220, or play multimedia content sent by the computer system 250 and the peripheral device 230, etc. The specific structure of the display system 260 is not further described herein with reference to the embodiments of the display device described above.

The four subsystems shown in this embodiment are only examples, and the sensor system 210, the control system 220, the computer system 250, and the display system 260 are not limiting. In practical applications, the vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In practice, the vehicle may include more or fewer subsystems or elements, and the application is not limited.

The vehicles in the embodiment of the application can be known vehicles such as automobiles, airplanes, ships, rockets and the like, and can also be new vehicles in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid vehicle, for example, a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which is not particularly limited in the present application.

In one possible application scenario, the display device 20 of the present application is integrated with a near-eye display (NEAR EYE DISPLAY, NED) device, which may be, for example, an augmented reality (augmented reality, AR) device or a Virtual Reality (VR) device, which may include, but is not limited to, AR glasses or AR helmets, and a VR device, which may include, but is not limited to, VR glasses or VR helmets. Taking AR glasses as an example, a user may wear an AR glasses device to play games, watch videos, participate in virtual meetings, or video shopping, etc.

In another possible application scenario, the display device 20 of the present application is integrated into a projector that can project an image onto a wall surface or projection screen.

In yet another possible implementation, the display device 20 of the present application is integrated into an in-vehicle display screen, which may be mounted in a seat back or co-driver position of a vehicle, etc., and the present application is not limited to the location where the in-vehicle display screen is mounted.

The application scenario given above is merely an example, and the display device provided by the present application may also be applied to other possible scenarios, such as medical devices, which is not limited by the present application.

Although the application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A display device, characterized by comprising: an image generation unit and an optical imaging unit;

The optical imaging unit comprises a first optical device, a second optical device and an optical waveguide;

The image generation unit is used for generating first image light and second image light;

The first optical device is used for receiving first image light, configuring a first focal power value for the first image light, generating third image light, and coupling the third image light into the optical waveguide from a coupling-in area of the optical waveguide;

The second optical device is configured to receive a second image light, configure a second focal power value for the second image light, generate a fourth image light, couple the fourth image light into the optical waveguide from a coupling-in region of the optical waveguide, and make the first focal power value different from the second focal power value;

the optical waveguide is used for coupling out the third image light from a coupling-out area of the optical waveguide;

the optical waveguide is further configured to couple out the fourth image light from a coupling-out region of the optical waveguide.

2. The display device of claim 1, wherein the display device comprises a display device,

The image generation unit comprises a light modulator and a lens; the optical modulator comprises a first modulation region and a second modulation region;

The first modulation area is used for generating the first image light according to first image information;

the second modulation area is used for generating second image light according to second image information;

the lens is used for receiving the first image light generated by the first modulation area and transmitting the first image light to the first optical device;

The lens is further configured to receive the second image light generated by the second modulation region, and transmit the second image light to the second optical device.

3. The display device of claim 2, wherein the display device is configured to display the plurality of images,

The image generation unit further comprises a light source;

the light source is used for generating a light beam and transmitting the light beam to the light modulator;

The first modulation area is specifically configured to modulate the light beam according to the first image information to generate the first image light;

the second modulation area is specifically configured to modulate the light beam according to the second image information to generate the second image light.

4. A display device according to claim 2 or 3, wherein,

The image generation unit further comprises a display screen; the display screen comprises a first display area and a second display area;

the lens is specifically configured to transmit the first image light to the first display area of the display screen;

The first display area is used for displaying the first image light according to a first preset angle distribution;

The first display area is further configured to transmit the first image light to the first optical device;

The lens is further specifically configured to transmit the second image light to the second display area of the display screen;

the second display area is used for displaying the second image light according to a second preset angle distribution;

The second display area is further configured to transmit the second image light to the second optical device.

5. A display device, characterized by comprising: an image generation unit and an optical imaging unit;

the optical imaging unit comprises an optical device, a predetermined reflecting element and an optical waveguide;

The predetermined reflection element is used for receiving first image light and reflecting the first image light to the optical device;

The optical device is used for configuring focal power values for the first image light, generating third image light and coupling the third image light into the optical waveguide from the coupling-in area of the optical waveguide;

the optical device is further configured to receive a second image light, configure the optical power value for the second image light, generate a fourth image light, and couple the fourth image light into the optical waveguide from a coupling-in region of the optical waveguide;

6. The display device of claim 5, wherein the display device comprises a display device,

The lens is used for receiving the first image light generated by the first modulation area and transmitting the first image light to the preset reflecting element;

The lens is further configured to receive the second image light generated by the second modulation region, and transmit the second image light to the optical device.

7. The display device of claim 6, wherein the display device comprises a display device,

The image generation unit further comprises a light source;

8. The display device according to claim 6 or 7, wherein,

the first display area is further configured to transmit the first image light to the predetermined reflection element;

the second display area is further configured to transmit the second image light to the optical device.

9. A vehicle comprising a display device according to any one of claims 1-8, said display device being mounted on said vehicle.

10. The vehicle of claim 9, further comprising a windshield,

The windshield glass is used for receiving the third image light emitted by the display device and reflecting the third image light to eyes of a driver of the vehicle;

The windshield is further configured to receive the fourth image light emitted through the display device and reflect the fourth image light to an eye of a driver of the vehicle.

11. A display device, characterized by comprising: an image generation unit and an optical imaging unit; the optical imaging unit comprises an optical device and an optical waveguide;

the image generation unit is used for generating first image light;

The optical device is used for receiving first image light, configuring focal power values for the first image light, generating second image light, and coupling the second image light into the optical waveguide from a coupling-in area of the optical waveguide;

The optical waveguide is used for coupling out the second image light from the coupling-out area of the optical waveguide.

12. The display device of claim 11, wherein the display device is configured to display the plurality of images,

The image generation unit comprises a light modulator and a lens;

The light modulator is used for generating first image light according to the image information;

The lens is used for receiving the first image light generated by the light modulator and transmitting the first image light to the optical device.

13. The display device of claim 12, wherein the display device is configured to display the plurality of images,

The image generation unit further comprises a light source;

the light modulator is specifically configured to modulate the light beam according to the image information to generate the first image light.

14. The display device according to claim 12 or 13, wherein,

The image generation unit further comprises a display screen;

the lens is specifically configured to transmit the first image light to the display screen;

The display screen is used for displaying the first image light according to preset angle distribution;

the display screen is further configured to transmit the first image light to the optical device.

15. A vehicle comprising a display device according to any one of claims 11-14, the display device being mounted on the vehicle.

16. The vehicle of claim 15, further comprising a windshield,

The windshield is used for receiving the second image light emitted by the display device and reflecting the second image light to eyes of a driver of the vehicle.