CN111966165A - Electronic device and holographic display device - Google Patents

Abstract

The embodiments of the present application provide an electronic device and a holographic display device, including a device main body, an external accessory, and a holographic display assembly disposed on the external accessory; the device main body includes an installation groove, and the external accessory is detachably arranged in the installation groove The holographic display component and the device main body are in communication connection; when the holographic display component is located outside the installation slot, the holographic display component is used for holographic display of the display information sent by the device main body. In the embodiment of the present application, the external accessories including the holographic display assembly are detachably arranged in the installation slot, and are communicatively connected with the device body. Therefore, the holographic display assembly can receive the display information sent by the device body, and respond to the The display information is holographically displayed, and the space is rationally used, which makes the holographic display component easy to carry, and saves the connection operation between the main body of the device and the holographic display component, which is convenient to operate and improves the customer's use experience.

Description

Electronic equipment and holographic display device

technical field

The present application relates to the field of electronic technology, and in particular, to an electronic device and a holographic display device.

Background technique

In recent years, with the diversification of user demands, smart electronic devices have more and more functions. Among them, holographic projection technology for recording and reproducing real three-dimensional images of objects has gradually attracted people's attention.

In the prior art, when a user displays multimedia data to be displayed in an electronic device such as a mobile phone through a holographic display device for three-dimensional holographic display, it is necessary to firstly communicate and connect the electronic device and the holographic display device through Bluetooth and other means, so as to connect the electronic device to the holographic display device. The multimedia data to be displayed is sent to the holographic display device. After reading the multimedia data to be displayed, the holographic display device parses the multimedia data to be displayed, and completes the holographic projection of the multimedia data to be displayed. Holographic display.

However, in the current solution, since the electronic device for storing multimedia data to be displayed and the holographic display device for 3D holographic display are two independent devices, they occupy a large space, making it inconvenient for the user and reducing the user's experience.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an electronic device and a holographic display device, so as to solve the problem in the prior art that when performing a three-dimensional holographic display through an electronic device, the device occupies a large space, resulting in a low user experience.

In order to solve the above problems, this application is implemented as follows:

In a first aspect, an embodiment of the present application provides an electronic device, including:

a device body, an external accessory, and a holographic display assembly disposed on the external accessory;

The device main body includes an installation groove, and the external accessories are detachably arranged in the installation groove;

The holographic display component is in communication connection with the device main body, and the holographic display component is used for receiving display information sent by the device main body;

When the holographic display assembly is located outside the installation groove, the holographic display assembly is used for holographic display of the display information.

In a second aspect, an embodiment of the present application provides a holographic display device, including:

an external accessory, and a holographic display assembly arranged on the external accessory;

Wherein, the holographic display assembly includes: a projection device and a control device;

The control device is arranged inside the external accessory, and the control device is used for receiving display information and controlling the projection device to perform holographic display on the display information;

The external accessories include: any one of a touch pen, a capacitive pen and an electromagnetic pen.

In the embodiment of the present application, the electronic device includes: a device main body, an external accessory, and a holographic display assembly disposed on the external accessory; the device main body includes an installation groove, and the external accessory is detachably arranged in the installation groove; the holographic display assembly The holographic display component is connected to the main body of the device in communication, and the holographic display component is used to receive the display information sent by the main body of the device; when the holographic display component is located outside the installation slot, the holographic display component is used to holographically display the display information. Compared with the traditional solution, in the embodiment of the present application, an installation groove is provided in the device main body of the electronic device, so that the external accessories including the holographic display assembly are detachably arranged in the installation groove, wherein the holographic display assembly and the Therefore, the holographic display component can receive the display information sent by the device main body, so that when the holographic display component is located outside the installation slot, the display information can be holographically displayed, so that the holographic display The components are detachably installed in the electronic equipment, and the space is rationally utilized, which makes the holographic display components easy to carry, and saves the connection operation between the main body of the electronic equipment and the holographic display components, which is convenient to operate and improves the user experience.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 shows an assembly diagram of an electronic device according to an embodiment of the present application;

FIG. 2 shows an assembly diagram of another electronic device according to an embodiment of the present application;

FIG. 3 shows an exploded view of an external fitting according to an embodiment of the present application;

FIG. 4 shows a front view of a projection device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an external accessory according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another external accessory according to an embodiment of the present application;

FIG. 7 shows an assembly diagram of another electronic device according to an embodiment of the present application;

FIG. 8 shows an internal structure diagram of an external fitting according to an embodiment of the present application;

FIG. 9 shows a top view of an external accessory according to an embodiment of the present application;

FIG. 10 shows a front view of an external fitting according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present application. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

FIG. 1 is an assembly diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 1 , the electronic device includes: a device main body 10 , an external accessory 20 , and a holographic display assembly 30 disposed on the external accessory 20 . ; wherein, the device main body 10 includes an installation slot 11, and the external accessories 20 are detachably arranged in the installation slot 11. At the same time, the holographic display assembly 30 is connected to the device main body 10 in communication, and the The holographic display assembly 30 is used for receiving the display information sent by the device main body 10 ; when the holographic display assembly 30 is located outside the installation slot 11 , the holographic display assembly 30 is used for displaying the display information. Holographic display.

Specifically, the size of the installation groove provided in the main body of the device matches the external fitting, so that the external fitting can be detachably installed in the installation groove of the main body of the device, so that the external fitting is installed in the external fitting. The holographic display assembly on the device can also be detachably installed in the installation slot of the main body of the device through external accessories.

Further, the holographic display component and the device main body can be connected in communication, so that the holographic display component can directly receive the display information sent by the device main body through the communication connection, wherein the display information can be the need to perform three-dimensional holography. displayed information.

After the holographic display component receives the display information sent by the device main body, and when the holographic display component is located outside the installation slot, the holographic display component can holographically display the display information, thereby completing the electronic device The process of performing three-dimensional holographic display of the display information generated or stored in the main body of the device.

Referring to FIG. 1 , when the holographic display assembly 30 is located outside the installation groove 11 , that is, all the external accessories 20 give birth to the device main body 10 , or the part of the external accessories 20 provided with the holographic display assembly 30 extends out of the device main body 10, so that the holographic display assembly 30 is separated from the installation groove 11 of the device main body 10, so that three-dimensional holographic display can be realized.

In this embodiment of the present application, the holographic display assembly may be disposed at one end of the external device away from the device body when the external accessory is installed in the device body, so that during the process of removing the external accessory from the device body , it can ensure that the holographic display component disposed at one end of the external accessory can be separated from the installation groove of the main body of the device without removing all the external devices from the main body of the device, so as to realize three-dimensional holographic display, and the operation is simple and convenient.

FIG. 2 is an assembly diagram of another electronic device provided by an embodiment of the present application. As shown in FIG. 2 , since the external accessory 20 is detachably arranged in the installation slot 11 of the device main body 10 , the external accessory 20 is completely When arranged in the installation slot 11 of the device main body 10, the device main body 10 and the external accessories 20 can form an integrated electronic device, so that the electronic device integrates the three-dimensional holographic display function and will be used to generate or store the three-dimensional holographic display. The device for displaying information is integrated with the device for performing three-dimensional holographic display on the displayed information, thereby saving space and facilitating the three-dimensional holographic display anytime and anywhere through the integrated device.

In the embodiment of the present application, those skilled in the art can set the type, quantity, size, and installation position of the external accessories according to the actual situation, and can also select the type of the holographic display component according to the actual situation. Do limit. Moreover, the device bodies in the embodiments of the present application include but are not limited to mobile phones, tablet computers, notebook computers, electronic writing pads, handheld electronic devices, vehicle-mounted terminals, wearable devices, and pedometers. The type is not specifically limited.

To sum up, the electronic device provided by the embodiments of the present application has at least the following advantages:

In the embodiment of the present application, the electronic device includes: a device main body, an external accessory, and a holographic display assembly disposed on the external accessory; the device main body includes an installation groove, and the external accessory is detachably arranged in the installation groove; the holographic display assembly The holographic display component is connected to the main body of the device in communication, and the holographic display component is used to receive the display information sent by the main body of the device; when the holographic display component is located outside the installation slot, the holographic display component is used to holographically display the display information. Compared with the traditional solution, in the embodiment of the present application, an installation groove is provided in the device main body of the electronic device, so that the external accessories including the holographic display assembly are detachably arranged in the installation groove, wherein the holographic display assembly and the Therefore, the holographic display component can receive the display information sent by the device main body, so that when the holographic display component is located outside the installation slot, the display information can be holographically displayed, so that the holographic display The components are detachably installed in the electronic equipment, and the space is rationally utilized, which makes the holographic display components easy to carry, and saves the connection operation between the main body of the electronic equipment and the holographic display components, which is convenient to operate and improves the user experience.

FIG. 3 is an exploded view of an external accessory provided by an embodiment of the present application. Optionally, the holographic display assembly 30 includes a projection device 50 and a control device 40 .

The projection device 50 is arranged at one end of the external fitting 20. Since the external fitting 20 is detachably arranged in the installation groove of the equipment main body, when the external fitting 20 is removed from the installation groove of the equipment main body , the projection device 50 located at one end of the external accessory 20 can be located outside the installation groove, so that further holographic projection can be performed to realize three-dimensional holographic display.

In addition, the control device 40 is arranged inside the external accessory 20, and the control device 40 can be communicated with the device main body of the electronic device, so that the display information sent by the device main body can be received, and the display information sent by the device main body can be received. When the projection device 50 is located outside the installation slot of the device body, the projection device 50 can be controlled to perform holographic display on the display information, thereby completing the process of performing three-dimensional holographic display on the display information generated or stored in the device body of the electronic device .

Optionally, the projection device 50 includes a driving member 51 , a rotating head 52 and a blade 53 . FIG. 4 is a front view of a projection device provided in an embodiment of the present application. As shown in FIGS. 3 and 4 , the driving The control device 40 drives the rotary head 52 to rotate through the driving member 51, so that the blade 53 rotates At the same time, an LED display light is provided on the blade 53, and the LED display light is electrically connected to the control device 40, and the control device 40 is used to control the LED display light to display according to the display information. .

Specifically, the three-dimensional holographic display uses the principle of interference to record the specific light waves emitted by the object in the form of interference fringes, so that all the information of the object light wave front is stored in the recording medium, and the recorded interference fringe pattern is called "" Hologram", when the hologram is illuminated with light waves, the original object light wave can be reproduced due to the principle of diffraction, thus forming a realistic three-dimensional image of the original object.

In the embodiment of the present application, the display information sent by the main body of the device received by the control device includes information related to the "hologram" that needs to be displayed holographically, and the control device can control the driving element to drive the The rotating head rotates to make the blades rotate, so that the LED display lights on the blades also rotate at a certain speed, and at the same time, the control device can control the LED display lights to display light of different colors and intensities according to the display information, and In the process of following the rotation of the blade, different three-dimensional holographic images are formed.

Optionally, the external fitting is provided with a first groove matching the vane, and when the vane is rotated until the axis of the vane coincides with the axis of the first groove, the vane is placed. in the first groove.

FIG. 5 is a schematic structural diagram of an external fitting provided by an embodiment of the present application. As shown in FIG. 5 , the external fitting 20 is provided with a first groove 21 matching the blade 53 . One end is connected to the rotating head 52, so the blade 53 can be rotated. FIG. 6 is a schematic structural diagram of another external fitting provided by the embodiment of the present application. As shown in FIG. 6, when the blade 53 rotates to the axis of the blade 53 and the When the axes of the first grooves 21 are coincident, the blades 53 are completely placed in the first grooves 21 of the outer fitting 20 .

Further, after the blade is completely placed in the first groove of the external fitting, the space occupied by the external fitting is small, therefore, the external fitting can be arranged in the installation groove of the main body of the device, as shown in FIG. 7 of the present application. An assembly diagram of another electronic device provided by the embodiment, as shown in FIG. 7 , after the blade 53 is completely placed in the first groove 21 of the external fitting 20 , the external fitting 20 can be set on the device main body 10 . 2, the external accessories 20 can finally be completely arranged in the installation groove 11 of the device main body 10, the device main body 10 and the external accessories 20 can form an integrated electronic device, so that the electronic device integrates The three-dimensional holographic display function integrates the device used to generate or store the display information that needs to be displayed in three-dimensional holographic display with the device for three-dimensional holographic display of the displayed information, thereby saving space and being convenient for users to carry around. 3D holographic display anytime, anywhere.

Optionally, a second groove matching the blade may also be provided at a position adjacent to the installation groove of the device body; when the external fitting is set in the installation groove, The vane is placed in the second groove.

In the embodiment of the present invention, a second groove matching the blade can be provided at a position adjacent to the installation groove on the main body of the device, so that it is not necessary to set the blade to a storable structure. When in the installation groove of the main body of the device, the blade is completely placed in the second groove of the main body of the device, and the main body of the device and the external accessories can also form an integrated electronic device, so that the electronic device integrates the three-dimensional holographic display function, and the The device used to generate or store the display information that needs to be displayed in 3D holographic display is integrated with the device for 3D holographic display of the displayed information, thus saving space and convenient for users to carry around, and through the integrated device, 3D holographic display can be performed anytime, anywhere. .

Optionally, a first contact area and a second contact area are provided at intervals in the length direction of the external fitting, and a third contact area is provided in the installation groove.

Specifically, referring to FIG. 6 , a first contact area 22 and a second contact area 23 are provided at intervals in the length direction of the external accessory 20 , and a third contact area is provided in the installation groove of the device body , so that when all the external accessories 20 are arranged in the installation groove of the device main body, it is ensured that the first contact area 22 is in contact with the third contact area in the installation groove of the device main body, so that the holographic display on the external accessories 20 is ensured. The component can maintain electrical connection and communication connection between the holographic display component on the external accessory 20 and the device body through the contact between the first contact area 22 and the third contact area, and then the device body The holographic display assembly can be powered through the electrical connection, and the display information that needs to be holographically displayed can also be sent to the holographic display assembly through the communication connection.

In addition, when the external accessory 20 partially protrudes from the installation groove of the device main body, it is ensured that the second contact area 23 is in contact with the third contact area in the installation groove of the device main body, so that the holographic display on the external accessory 20 is ensured. The component can maintain electrical connection and communication connection between the holographic display component on the external accessory 20 and the device body through the contact between the second contact area 23 and the third contact area, and then the device body The holographic display assembly can be powered through the electrical connection, and the display information that needs to be holographically displayed can also be sent to the holographic display assembly through the communication connection.

Optionally, the external accessories may include any one of a stylus pen, a capacitive pen and an electromagnetic pen.

Wherein, the stylus pen, capacitive pen and electromagnetic pen are all detachable external devices of the electronic device. When the external accessory is not used, the external accessory can be stored in the installation slot of the electronic device. When an external accessory is installed, the external accessory can be taken out from the installation slot of the electronic device.

Optionally, when the external accessory is the electromagnetic pen, the external accessory includes a built-in power supply, an electromagnetic pen head, an electromagnetic pen body and an antenna.

FIG. 8 is an internal structure diagram of an external accessory provided by an embodiment of the present application. As shown in FIG. 8 , the external accessory may be an electromagnetic pen. In order to realize the related functions of the electromagnetic pen, the external accessory further includes Built-in power supply 24 , electromagnetic pen head 25 , electromagnetic pen body 26 and antenna 27 .

Wherein, when all the external accessories are located in the installation groove of the device main body, the external accessories can pass through the first contact area 22 on the external accessories and the third contact area in the installation groove of the device main body, and use the device main body as the The holographic display component of the external accessory is powered; when the external accessory partially protrudes from the installation slot of the device main body, the external accessory can pass through the second contact area 23 on the external accessory and the third contact in the device main body installation slot The device body is used to supply power to the holographic display components of the external accessories; and when the external accessories all extend out of the installation slots of the device body, the built-in power supply 24 can be used to power the holographic display components of the external accessories.

In addition, the electromagnetic pen head 25 in the external accessories is fixedly connected with the electromagnetic pen body 26, the projection device 50 in the holographic display assembly is arranged at the end of the electromagnetic pen body 26 away from the electromagnetic pen head 25, and the control device 40 in the holographic display assembly is arranged at the electromagnetic pen head 25. Inside the pen body 26, the antenna 27 is arranged on the control device 40, and interacts with the device main body through Bluetooth or Global Positioning System (Global Positioning System, GPS) and data transmission, so that the electromagnetic pen integrates a three-dimensional holographic display The function is to integrate the electromagnetic pen used for writing on the screen of the device main body with the device for three-dimensional holographic display, thereby saving space and being convenient for users to carry around.

Further, in order to realize the related functions of the electromagnetic pen, the control device is also provided with related electronic components such as resistors, capacitors, inductors and crystal oscillators.

Optionally, the control device may further include a micro-processing chip, and the micro-processing chip is communicatively connected to the device main body.

Specifically, when all the external accessories are located in the installation groove of the device body, the external accessories can receive the transmission from the device body through the first contact area on the external accessories and the third contact area in the installation groove of the device body. The display information that needs to be displayed in three-dimensional holographic display; when the external accessories partially protrude from the installation groove of the main body of the device, the external accessories can pass the second contact area on the external accessories and the third contact in the installation groove of the main body of the device. When the external accessories all extend out of the installation slot of the device body, the microprocessor chip can be used to receive and store the three-dimensional holographic display information sent by the device body. The display information of the holographic display, so that the control device can control the holographic display component to display the display information holographically according to the display information, so that the external accessories can be used as a separate holographic display device when they are separated from the main body of the device. 3D holographic projection.

In the embodiment of the present application, referring to FIG. 3 , the external accessory may further include a projection button 28 , and a user can control the holographic display component to perform holographic display through the projection button 28 .

FIG. 9 is a top view of an external accessory provided by an embodiment of the present application, and FIG. 10 is a front view of an external accessory provided by an embodiment of the present application. As shown in FIGS. 9 and 10 , the external accessory 20 is provided on the There is a fastener 210 with a snap groove 29. Correspondingly, a positioning member is provided in the installation groove of the main body of the device, so that the main body of the device and the external fitting 20 are connected with the positioning member by means of the fastener 210. Make sure that when all the external fittings 20 located in the installation groove of the main body of the device are pulled out from the installation groove of the main body of the device, the snap groove 29 of the fastener 210 on the external fitting 20 slides to the installation of the main body of the device When the positioning member in the slot is used, the external accessory 20 is fixed in this position, so as to ensure that the holographic display assembly 30 on the external accessory 20 can extend out of the installation slot of the main body of the device for holographic display, and also ensure that the external accessory 20 can be displayed on the The second contact area 23 is in contact with the third contact area, and the device body can supply power to the holographic display assembly 30 through the contact between the second contact area 23 and the third contact area, and will require The display information for holographic display is sent to the holographic display component 30 .

An embodiment of the present application further provides a holographic display device, the holographic display device includes: an external accessory, and a holographic display component disposed on the external accessory, and the external accessory includes: a stylus pen, a capacitive pen and any one of the electromagnetic pen.

Wherein, the holographic display assembly includes: a projection device and a control device, the control device is arranged inside the external accessory, the control device is used to receive display information, and control the projection device to display the information. The holographic display is performed, so that the external accessories of the electronic device integrate the three-dimensional holographic display function, and the external accessories of the electronic device with certain functions are integrated with the device for the three-dimensional holographic display, thereby saving space and convenient for users to carry. .

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims (10)

1. An electronic device, characterized in that the electronic device comprises: a device body (10), an external accessory (20), and a holographic display assembly (30) disposed on the external accessory (20); The device main body (10) includes an installation groove (11), and the external fitting (20) is detachably arranged in the installation groove (11); The holographic display component (30) is in communication connection with the device main body (10), and the holographic display component (30) is configured to receive display information sent by the device main body (10); When the holographic display assembly (30) is located outside the installation groove (11), the holographic display assembly (30) is used for holographic display of the display information. 2. The electronic device according to claim 1, characterized in that, The holographic display assembly (30) includes: a projection device (50) and a control device (40); Wherein, the projection device (50) is arranged at one end of the external fitting (20); The control device (40) is arranged inside the external accessory (20), the control device (40) is communicatively connected with the equipment main body (10), and the control device (40) is used for receiving Display information sent by the device main body (10), and control the projection device (50) to perform holographic display on the display information. 3. The electronic device according to claim 2, wherein, The projection device (50) comprises a driving member (51), a rotating head (52) and a blade (53); The driving member (51) is fixedly connected with the rotating head (52), one end of the blade (53) is connected with the rotating head (52), and the control device (40) passes through the driving member (51). ) drives the rotating head (52) to rotate, so that the blade (53) rotates; The blade (53) is provided with an LED display light, the LED display light is electrically connected to the control device (40), and the control device (40) is used for controlling the LED display according to the display information lights are displayed. 4. The electronic device according to claim 3, characterized in that, A first groove (21) matching the blade (53) is provided on the external fitting (20); When the blade (53) is rotated until the axis of the blade (53) coincides with the axis of the first groove (21), the blade (53) is placed in the first groove (21) . 5. The electronic device according to claim 3, characterized in that, A second groove matching the blade (53) is provided at a position adjacent to the installation groove (11) of the device body (10); When the external fitting (20) is set in the installation groove (11), the blade (53) is placed in the second groove. 6. The electronic device according to claim 1, wherein, A first contact area (22) and a second contact area (23) are arranged at intervals in the length direction of the external fitting (20), and a third contact area is arranged in the mounting groove (11) ; Under the condition that the external accessories (20) are all set in the mounting groove (11), the first contact area (22) is in contact with the third contact area, so that the holographic display assembly (30) electrical connection and communication connection with the device main body (10) through the first contact area (22) and the third contact area; Under the condition that the external accessory (20) partially protrudes from the mounting groove (11), and the second contact area (23) is in contact with the third contact area, the holographic display is made The assembly (30) is electrically and communicatively connected to the device main body (10) through the second contact area (23) and the third contact area. 7. The electronic device according to claim 2, wherein the external accessory (20) comprises: any one of a touch pen, a capacitive pen and an electromagnetic pen. 8. The electronic device according to claim 7, characterized in that, when the external accessory (20) is the electromagnetic pen, The external accessory (20) includes a built-in power supply (24), an electromagnetic pen head (25), an electromagnetic pen body (26) and an antenna (27); Wherein, when all the external accessories (20) extend out of the installation groove (11), the built-in power supply (24) supplies power to the holographic display assembly (30); The electromagnetic pen head (25) is fixedly connected with the electromagnetic pen body (26), and the projection device (50) is arranged at an end of the electromagnetic pen body (26) away from the electromagnetic pen head (25); The antenna (27) is arranged on the control device (40). 9. The electronic device according to claim 2, wherein, The control device (40) includes a microprocessing chip, and the microprocessing chip is connected in communication with the device main body (10); When all the external accessories (20) extend out of the mounting slot (11), the microprocessor chip is configured to receive the display information sent by the device main body (10), and control the display information according to the display information. The holographic display component (30) performs holographic display on the display information. 10. A holographic display device, wherein the holographic display device comprises: an external accessory (20), and a holographic display assembly (30) arranged on the external accessory (20); Wherein, the holographic display assembly (30) comprises: a projection device (50) and a control device (40); The control device (40) is arranged inside the external accessory (20), and the control device (40) is configured to receive display information and control the projection device (50) to perform holographic display on the display information ; The external accessories (20) include: any one of a touch pen, a capacitive pen and an electromagnetic pen.

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