TW201937235A - Near-eye displaying method with imaging at multiple depths of field arranging at least one collimation light direction changing element on the path of light for the light beam from the collimation element - Google Patents

Abstract

A near-eye displaying method with imaging at multiple depths of field comprises irradiating light source onto a collimation element by using one or more single pixels of a self-luminous display or a pixel group containing a plurality of pixels such that incident light passing through the collimation element may be collimated. Arrange at least one collimation light direction changing element on the path of light for the light beam from the collimation element. Two light beams passing through the collimation element will be modulated by the collimation light direction changing element to change its collimation light direction so as to superimpose at different locations to focus and change the depth of field, thereby achieving the purpose of imaging at multiple depths of field.

Description

Near-eye display method with multiple depth of field imaging

The present invention relates to a near-eye display method with multiple depth of field imaging, in particular to a near-eye display capable of overlapping beams emitted by any two pixels to produce different positions of focus so that the output image can exhibit multiple depths of field. method.

In response to the increasing demand for instant information in modern society, the delivery of on-demand information has received much attention. The near-eye display is a good choice for portable personal information devices because of its portability and the ability to update and deliver images, colors or text at any time in conjunction with electronic devices. Early near-eye displays were mostly military or government use. Recently, some manufacturers have seen business opportunities and introduced near-eye displays to homes. In addition, entertainment-related industry also sees the potential of this market, such as home game instruments and game software related manufacturers have invested in research and development.

Currently, the near-eye display (NED) includes a head-mounted display (HMD) that projects images directly into the viewer's eyes. This type of display can overcome other action display form factors by synthesizing a virtual large-format display surface. Available in a limited screen size, or for virtual or augmented reality applications.

The near-eye display can be subdivided into two major categories: immersive displays and see-through displays. An immersive display can be employed in a virtual reality (VR) environment to fully encompass the user's field of view using a composite rendered image. In augmented reality (AR) applications, a see-through display can be used in which text, other synthetic annotations, or images can be overlaid in the field of view of the user in a physical environment. In terms of display technology, AR applications require a translucent display (eg, by optical or electro-optic methods) such that a near-eye display can be used to simultaneously view the physical world.

However, since the human eye cannot focus (focus) on the fact that the object is placed at a close distance (for example, when the user is wearing glasses, reading the distance between the lens of the magnifying glass and the user's eyes). Difficult to construct. Therefore, the near-eye display must be adjusted to make the viewer comfortable to use, otherwise it will cause the occurrence of defocusing and other effects, but the traditional use of complex and cumbersome optical components to adjust, but because of the near-eye display Most of them must be worn directly on the viewer's head, so the near-cuddly near-eye display is often not acceptable to consumers.

Therefore, in order to overcome the above problem, if the beams emitted by any two or more pixels can be overlapped to generate focus so that the output image can be clearly presented, it is not necessary to use bulky optical components, and It also saves the extra cost of using bulky optical components, which should be an optimal solution.

The above-mentioned near-eye display method with multiple depth of field imaging can be achieved by: (1) being capable of emitting a light source to a collimating element through one or more pixels on a self-illuminating display, so as to pass through the standard The incident light of the straight element can achieve a collimating effect; and (2) at least one of the collimating light direction changing elements can be disposed on the light direction path of the light beam of the collimating element for changing at least two pixels Collimate the light direction to overlap at different locations to produce focus and change depth of field.

More specifically, the display technology used in the self-luminous display is an organic light emitting diode (OLED), a micro LED, a quantum dot, a laser, or any other. Form of active illumination source.

More specifically, the self-luminous display is a transparent display or a non-transparent display.

More specifically, the collimating element is a microlens, a flat meta-lens or a liquid crystal optical spatial modulator (LCSLM).

More specifically, the planar ultra-lens lens can achieve the effect of the refracting mirror to achieve the collimation effect of the light direction.

More specifically, the liquid crystal light spatial modulator has a liquid crystal, and the liquid crystal alignment can be adjusted by changing the voltage so that the direction of the light of the incident light of each pixel can achieve the collimation effect.

More specifically, the collimated light direction changing element is a microlens, a flat meta-lens or a liquid crystal optical spatial modulator (LCSLM).

More specifically, the microlenses are used to enable at least two collimated beam systems to overlap to produce focus.

More specifically, the planar ultra-lens lens system includes a plurality of regions having bumps for adjusting the direction in which the collimated light is changed to enable at least two collimated beam systems to overlap to produce focus.

More specifically, the two different collimated regions are caused to intersect at least two collimated beams at different locations to achieve overlapping multiple depth-of-field visualizations at different locations.

More specifically, the one through the same, another different region having convex ridges, causes the two collimated beams to overlap at different positions to achieve overlapping of different positions to generate multiple depth of field of focus. image.

More specifically, the liquid crystal light spatial modulator has a liquid crystal, and the liquid crystal alignment can be adjusted by changing the voltage to change the collimated beam direction, so that at least two collimated beam systems can be delivered. Stack to create focus.

More specifically, the ability to vary the drive voltage on at least two of the liquid crystals to cause the two collimated beams to overlap at different locations to achieve overlapping multiple depth-of-field visualizations at different locations.

More specifically, the ability to vary the drive voltage on at least one of the different liquid crystals causes the two collimated beams to overlap at different locations to achieve overlapping multiple depth-of-field visualizations at different locations.

More specifically, the pixel refers to a single pixel or a pixel group containing a plurality of pixels.

Other details, features, and advantages of the present invention will be apparent from the following description of the preferred embodiments.

Please refer to FIG. 1 , which is a schematic flow chart of a near-eye display method with multiple depth of field imaging according to the present invention. The steps are as follows: (1) capable of transmitting one or more pixel pairs on a self-illuminating display a collimating element emits light from the source such that incident light passing through the collimating element can achieve a collimating effect 101; and (2) at least one collimated light direction changing element can be disposed on the beam of the collimating element The direction path is used to change the collimated light direction emitted by the at least two pixels to be able to overlap at different positions to generate focus and change the depth of field 102.

In the above process, the display technology used in the self-luminous display 1 is a display capable of autonomous illumination, and the self-luminous display 1 can be a transparent display or a non-transparent display, and the type of the self-luminous display can be organic Light-emitting diodes (OLEDs), micro-LEDs, quantum dots, lasers, or any other form of active light source.

The collimating component is a micro lens, a liquid crystal spatial light modulator (LCSLM) or a flat meta-lens, wherein different types of collimating components are described below. (1) mircrolens: as shown in FIG. 2A, the microlens 2 is located on a path in which the light beam emitted from the self-luminous display 1 travels, and when operated, as shown in FIG. 2B The light source direction of the light beam incident on the at least one pixel 11 on the self-luminous display 1 can be made to achieve a collimating effect. (2) Liquid crystal light spatial modulator (LCSLM): as shown in FIG. 3A, the liquid crystal light spatial modulator 3 has a plurality of liquid crystals 31, and at least one pixel 11 on the self-luminous display 1 is emitted. When the incident light beam is as shown in FIG. 3B, the driving voltage on the liquid crystal 31 contacting the light beam incident on the at least one pixel 11 can be further changed to make the light direction of the light beam incident on the pixel 11 collimate. (The control device used to change the driving voltage on the liquid crystal 31 to change the phase of the liquid crystal is a conventional technique, and therefore no additional explanation). (3) Flat meta-lens: As shown in Fig. 4A, the planar superlens 4 system includes a plurality of regions 41 having bumps, and when operated, as shown in Fig. 4B The light beam incident on at least one of the pixels 11 can pass through one of the regions 41 to enable the light direction to achieve a collimating effect (while the planar super-lens lens 4 allows the light to travel in different directions is a conventional technique, so no additional explanation), and The flat meta-lens also refers to the metasurface formed by nano-convex, which has the function of refraction and changing the direction of collimated light.

The collimated light direction changing element is a micro lens, a liquid crystal light spatial modulator (LCSLM) or a flat meta-lens, wherein different types of collimated light direction changing elements are described below. (1) mircrolens: (a) wherein the structure of the microlens 2 is the same as that of FIG. 2A, so that at least two beams of the collimating effect can be overlapped to produce a focus of the virtual image; Wherein two different microlenses 2 are used to overlap the two collimated beams, and another microlens 2 is used to overlap at different positions to produce a focused multiple depth of field image. (2) Liquid crystal light spatial modulator (LCSLM): (a) The liquid crystal light spatial modulator 3 has the same structure as that of Fig. 3A, and has a plurality of liquid crystals 31 for adjusting the operation of the collimated light direction. The principle is to change the driving voltage on the liquid crystal 31 contacting the light beam incident on the two pixels, so that at least two beams of the collimated effect are changed in direction to overlap to produce a virtual image focus; (b) Wherein the driving voltages on the at least two different liquid crystals 31 can be changed such that the two collimated beams are overlapped at different positions to achieve overlapping multiple depth of field images at different positions; (c Wherein the driving voltage on one liquid crystal 31 can be changed, but changing the driving voltage on at least one of the other different liquid crystals 31 enables the two collimated beams to overlap at different positions to achieve different The positions overlap to produce multiple depth of field images of focus. (3) Flat meta-lens: (a) wherein the planar super-lens 4 has the same structure as that of FIG. 4A, so that at least two beam systems that achieve the collimation effect can be overlapped. The focus of the virtual image; (b) through the two different regions 41 with bumps, so that the two collimated beams are overlapped at different positions to achieve overlapping multiple depths of focus at different positions. (c) wherein one of the same and another different regions 41 having bumps is used to cause the two collimated beams to overlap at different positions to achieve different positions to produce focus. Multiple depth of field imaging.

When it is actually necessary to generate multiple depth of field imaging, it can be matched with different collimating components and different collimating light direction changing components, and the matching state is as follows: (1) The collimating component uses micromirrors, and the collimation The light direction changing element can use a microlens, a liquid crystal light spatial modulator (LCSLM) or a flat meta-lens. (2) The collimating element uses a liquid crystal light spatial modulator (LCSLM), and the collimating light direction changing element can use the same liquid crystal optical spatial modulator (LCSLM). (3) The collimating element uses a flat meta-lens, and the collimating light direction changing element can use the same flat meta-lens. (4) The collimating element uses a flat meta-lens, and the collimating light direction changing element can use a microlens, a liquid crystal spatial modulator (LCSLM) or a planar super-lens ( Flat meta-lens).

As shown in FIG. 5A, the collimating element used is the microlens 2, and the collimated light direction changing element is the liquid crystal optical spatial modulator 3, wherein when the microlens 2 is capable of the two on the self-luminous display 1 After the direction of the light beam incident on the pixel 11 can achieve the collimation effect, the liquid crystal 31 of the liquid crystal spatial modulator 3 adjusts the collimated light direction of the beam of one or more of the pixels 11 to The images of the pixels 11 can be extended and merged into a virtual image 51. Then, as shown in FIG. 5B, the phase of the liquid crystal 31 can be adjusted to change the direction of the collimated light, so that the images of the two pixels 11 can be overlapped and merged. In another position, the other virtual image 52 is formed to lengthen the depth of field. Therefore, by the above method, the phase of the liquid crystal 31 can be continuously adjusted, so that the eye 6 can see a plurality of consecutive virtual images to achieve multiple depth of field display. For the purpose.

In addition, it is also possible to use a single component for collimating and adjusting the collimated light direction, as follows: (1) The microlens 2 can be directly collimated and the collimated light direction can be adjusted, but different microlenses can be preset through the process. Adjusting the direction of the collimated light is different, so as shown in Fig. 6A, after the two different microlenses 2 are collimated, the beams of the two collimated effects are overlapped to produce the focus of the virtual image, but if another image is to be formed, The focus of the virtual image is as shown in Fig. 6B, and the other microlens 2 overlaps with the light beam which is originally collimated by the microlens 2 and produces the focus of the other virtual image. (2) It is also possible to simultaneously collimate and adjust the collimated light direction using only the liquid crystal light spatial modulator 3 or the planar super-lens lens 4, and the liquid crystal 31 of the liquid crystal optical spatial modulator 3 can directly change the liquid crystal 31 The driving voltage is used to adjust the direction of the collimated light to form the focus of the virtual image at different positions. However, the planar super-lens 4 must pass through a plurality of different regions 41 having bumps to form the focus of the virtual image at different positions.

The near-eye display method with multiple depth of field imaging provided by the present invention has the following advantages when compared with other conventional techniques: 1. The present invention is capable of overlapping beams emitted by two or more pixels. The focus is generated at different positions so that the output image exhibits multiple depth of field imaging effects, and the above pixel refers to a single pixel or a pixel group containing a plurality of pixels. 2. The liquid crystal light spatial modulator of the present invention can directly adjust the direction of the collimated light, so that the beams emitted by the two pixels can be overlapped and the focus can be generated at different positions without moving the pixel position. It saves the extra cost of using other optical components.

The present invention has been disclosed above by the above-described embodiments, and is not intended to limit the present invention. Any of those skilled in the art can understand the foregoing technical features and embodiments of the present invention without departing from the present invention. In the spirit and scope of the invention, the scope of the invention is to be determined by the scope of the appended claims.

1‧‧‧ Self-illuminating display

11‧‧‧ pixels

2‧‧‧Microlens

3‧‧‧LCD light space modulator

31‧‧‧LCD

4‧‧‧ planar super-lens lens

41‧‧‧Nano lens

51‧‧‧virtual image

52‧‧‧virtual image

6‧‧‧ human eyes

[Fig. 1] is a flow chart showing a near-eye display method with multiple depth of field imaging of the present invention. [Fig. 2A] is a schematic view showing the first implementation architecture of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 2B] is a schematic view showing the first implementation application of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 3A] is a schematic view showing a second embodiment of the near-eye display method of the present invention having multiple depth of field imaging. [Fig. 3B] is a schematic view showing a second implementation application of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 4A] is a schematic view showing a third embodiment of the near-eye display method of the present invention having multiple depth of field imaging. [Fig. 4B] Fig. 4 is a schematic view showing a third implementation application of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 5A] is a schematic diagram of multiple depth of field of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 5B] is a schematic diagram of multiple depth of field of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 6A] is a schematic diagram showing multiple depth of field of another embodiment of the near-eye display method with multiple depth of field imaging of the present invention. [Fig. 6B] is a schematic diagram showing multiple depth of field of another embodiment of the near-eye display method with multiple depth of field imaging of the present invention.

Claims (15)

A near-eye display method with multiple depth of field imaging, the method is: emitting light from a collimating element through one or more pixels on a self-illuminating display to make incident through the collimating element Light can achieve a collimating effect to form collimated light; and at least one collimated light direction changing element can be disposed on a light direction path of the beam of the collimating element for changing collimated light emitted by at least two pixels The direction is to be able to overlap at different locations to produce focus and change the depth of field. The near-eye display method with multiple depth of field imaging as claimed in claim 1, wherein the display technology used in the self-luminous display is an organic light emitting diode (OLED), a micro light emitting diode (micro LED), and a quantum dot. (Quantum dot)), laser or any other form of active illumination source. A near-eye display method with multiple depth of field development as claimed in claim 1, wherein the self-luminous display is a transparent display or a non-transparent display. A near-eye display method with multiple depth of field imaging as claimed in claim 1, wherein the collimating element is a mircrolens, a flat meta-lens or a liquid crystal optical spatial modulator (LCSLM). ). The near-eye display method with multiple depth of field imaging as claimed in claim 4, wherein the planar super-lens lens can achieve the effect of the refracting mirror to enable the light direction to achieve a collimating effect. A near-eye display method with multiple depth of field imaging as claimed in claim 4, wherein the liquid crystal light spatial modulator has liquid crystal, and the liquid crystal alignment can be adjusted by changing the voltage so that the light direction of the incident light of each pixel Can achieve the collimation effect. A near-eye display method with multiple depth of field imaging as claimed in claim 1, wherein the collimated light direction changing element is a microlens, a flat meta-lens or a liquid crystal spatial modulation. (LCSLM). A near-eye display method having multiple depth of field imaging as claimed in claim 7, wherein the microlens is used to enable at least two collimated beam systems to overlap to produce focus. A near-eye display method with multiple depth-of-field imaging as claimed in claim 7, wherein the planar super-lens lens system comprises a plurality of regions having convex regions for enabling at least two collimated beam systems to overlap. Focus. A near-eye display method with multiple depth of field imaging as claimed in claim 9, wherein at least two collimated beams are overlapped at different positions by different two different regions having convex regions to achieve different positions. Overlapping to produce multiple depth of field visualizations of focus. A near-eye display method with multiple depth of field imaging as claimed in claim 9, wherein at least two collimated beams are overlapped at different positions by one of the same and another different regions having convex spots. Multiple depth of field imaging that achieves focus by overlapping at different locations. A near-eye display method with multiple depth of field imaging as claimed in claim 7, wherein the liquid crystal light spatial modulator has a liquid crystal, and the liquid crystal alignment can be adjusted by changing a voltage to change the collimated beam direction to at least The two beam systems that achieve the collimation effect are able to overlap to produce focus. A near-eye display method with multiple depth of field imaging as claimed in claim 12, wherein the driving voltages on the at least two liquid crystals can be changed such that the two collimated light beams overlap at different positions to reach different positions. Overlapping to produce multiple depth of field visualizations of focus. A near-eye display method with multiple depth of field imaging as claimed in claim 12, wherein the driving voltage on at least one different liquid crystal can be changed to cause the two collimated beams to overlap at different positions to achieve different The positions overlap to produce multiple depth of field images of focus. A near-eye display method with multiple depth of field imaging as claimed in claim 1, wherein the pixel refers to a single pixel or a pixel group including a plurality of pixels.