WO2023284468A1

WO2023284468A1 - Multifunctional display device, display driving method and projection driving method

Info

Publication number: WO2023284468A1
Application number: PCT/CN2022/098677
Authority: WO
Inventors: 翟峰
Original assignee: 重庆康佳光电技术研究院有限公司
Priority date: 2021-07-14
Filing date: 2022-06-14
Publication date: 2023-01-19
Also published as: CN115616846A

Abstract

The present application relates to a multifunctional display device, a display driving method and a projection driving method. The multifunctional display device comprises: a display screen (10), the display screen (10) being provided with a first display area (11) and a second display area (12), wherein the area of the first display area (11) is greater than that of the second display area (12), and the second display area (12) is located at an edge of the display screen (10); and a projection assembly (20), which projection assembly (20) is arranged on the display screen (10), corresponds to the second display area (12) and is configured to project an image of the second display area (12) to a projection screen.

Description

Multifunctional display device, display driving method, and projection driving method

This application claims the priority of the patent application submitted to the State Intellectual Property Office of China on July 14, 2021, with the application number 202110799310.4, and the invention titled "multifunctional display device, display driving method, and projection driving method".

technical field

The present application relates to the technical field of display devices, and in particular, to a multifunctional display device, a display driving method, and a projection driving method.

Background technique

As people's requirements for the quality of life are getting higher and higher, there are more and more requirements for watching dramas and watching movies at home, and the requirements for projectors are getting higher and higher. At present, both the display screen and the projector have become necessary viewing devices at home, but the display screen only has the function of display, while the projector only has the function of projection, and the two can only be used separately, occupying a lot of space.

That is to say, the display screen in the prior art has the problem of single function.

Contents of the invention

In view of the above deficiencies in the prior art, the purpose of the present application is to provide a multifunctional display device, a display driving method and a projection driving method, aiming at solving the problem of single function of the display screen in the prior art.

A multifunctional display device, comprising: a display screen, the display screen has a first display area and a second display area, the area of the first display area is larger than the area of the second display area, and the second display area is located at the edge of the display screen; The projection component is arranged on the display screen and corresponds to the second display area, and is used for projecting the image of the second display area onto the projection screen.

By setting the display screen as a first display area and a second display area, the first display area is only used for display, so that the display screen can realize the function of display. The second display area can be used for display or projection. When the second display area cooperates with the projection component, the function of projection can be realized. The second display area can also be displayed simultaneously with the first display area, so that the entire display screen can display a complete pattern. The area of the first display area is larger than the area of the second display area. Such setting makes most of the area of the display screen be used for display, and only a small part of the area is used for projection, which can ensure the display function of the display screen. At the same time, the area of the light source required by the projection assembly is also relatively small, which is beneficial for all light beams emitted from the second display area to enter into the projection assembly. Since the projection assembly is installed on the display screen, and at least a part of the projection assembly is arranged facing the second display area, the light beam emitted by the second display area enters into the projection assembly. Setting the second display area at the edge of the display screen facilitates the installation of the projection assembly and the display screen together, and the projection assembly will not block the first display area, ensuring the stability of the first display area.

In one embodiment of the present application, the projection assembly is detachably connected to the display screen.

In one embodiment of the present application, the display screen includes: a first LED chip, the first LED chip is set in the first display area; a second LED chip, the second LED chip is set in the second display area, the first LED chip The size of the chip is larger than the size of the second LED chip.

In one embodiment of the present application, the projection assembly includes: a projection box, the projection box has an optical cavity and an installation groove, the optical cavity communicates with the installation groove, the display screen is located in the installation groove, and the display surface of the display screen faces the optical cavity; The lens assembly, the projection lens assembly is located in the optical cavity to project the light from the display screen onto the projection screen.

In one embodiment of the present application, the installation groove overlaps with at least a part of the optical cavity, the installation groove is U-shaped, and one groove side wall of the installation groove has an opening communicating with the optical cavity.

In one embodiment of the present application, a side wall of the optical cavity has a projection hole, at least a part of the projection lens assembly is disposed on the projection hole, and the projection hole and the installation groove are located on opposite sides of the opening.

In one embodiment of the present application, a side wall of the optical cavity has a projection hole, at least a part of the projection lens assembly is disposed on the projection hole, and the projection hole and the installation groove are located on the same side of the opening.

In one embodiment of the present application, the projection lens assembly includes: a lens group, the lens group is arranged in the optical cavity; a projection lens, the projection lens is arranged on the projection hole, and the lens group reflects the light entering the optical cavity through the opening to the projection on the lens.

In an embodiment of the present application, the projection assembly further includes a magnetic attractor, and the magnetic attractor is disposed on another groove side wall of the installation groove.

A display driving method, the display driving method is applied to the above-mentioned multi-function display device, after the projection assembly of the multi-function display device is separated from the display screen of the multi-function display device; the first display area of the display screen is lit, the first display area Displaying the first picture; lighting up the second display area of the display screen, the second display area displays the second picture, and the first picture and the second picture are spliced to form an entire display picture.

After the projection assembly is separated from the display screen, the projection assembly will not block the second display area, adjust the multi-function display device to the display state, and light up the first display area and the second display area, so that the first display area and the second display area The first picture and the second picture are displayed separately, and the displayed content of the first picture and the second picture is different and spliced into a whole display picture, so that each position on the display screen can be displayed, and what is displayed is a complete picture.

A projection driving method, the projection driving method is applied to the above-mentioned multi-function display device, after the projection assembly of the multi-function display device is connected with the display screen of the multi-function display device, the second display area of the display screen is lit, and the second display area The projection screen is displayed, and the projection screen is injected into the projection component for projection, and the projection screen is projected onto the projection screen.

After the projection component is connected to the display screen, the multi-function display device is adjusted to the projection state, and the second display area is lighted, so that the second display area can display a projection picture, and the projection picture is projected onto the projection screen through the projection component to achieve the projection effect. The purpose is to enable the above-mentioned multifunctional display device to realize the projection function.

Description of drawings

FIG. 1 is a structural diagram of a multifunctional display device according to an embodiment of the present application;

FIG. 2 is a schematic exploded view of a multifunctional display device according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a projection box according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a projection box according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a display screen according to an embodiment of the present application;

Fig. 6 is a structural diagram of a multi-function display device according to another embodiment of the present application;

Fig. 7 is a structural diagram of a projection assembly according to another embodiment of the present application.

Explanation of reference signs:

10-display screen; 11-first display area; 12-second display area; 13-first LED chip; 14-second LED chip; 15-magnetic parts; 20-projection assembly; 21-projection box; 22- Optical cavity; 23-mounting slot; 24-projection lens assembly; 241-lens group; 242-projection lens; 243-collimator lens; 244-first mirror; 245-second mirror; 25-opening; 26- Light-transmitting part; 27-magnetic suction part; 28-projection hole.

detailed description

In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the application more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

As described in the background section, there is a problem that the display screen has a single function in the prior art.

Based on this, the present application hopes to provide a solution capable of solving the above-mentioned technical problems, the details of which will be described in subsequent embodiments.

As shown in Figures 1 to 7, the multifunctional display device includes a display screen 10 and a projection assembly 20, the display screen 10 has a first display area 11 and a second display area 12; the projection assembly 20 is arranged on the display screen 10 and is connected to the second display area The two display areas 12 correspond to each other, and are used to project the image of the second display area 12 onto the projection screen.

By setting the display screen 10 into a first display area 11 and a second display area 12 , the first display area 11 is only used for display, so that the display screen 10 can realize the function of display. The second display area 12 can be used for display or projection. When the second display area 12 cooperates with the projection assembly 20, the function of projection can be realized. The second display area 12 can also be displayed simultaneously with the first display area 11, so that the entire display screen 10 can display a complete pattern.

Specifically, the multi-function display device has a display state, a projection state, and a projection plus display state. When the multi-function display device is in the display state, the first display area 11 and the second display area 12 are displayed and spliced into one picture. The multi-function display device When in the projection state, only the second display area 12 is displayed and projected by the projection assembly 20; when the multi-function display device is in the projection plus display state, the first display area 11 displays the first picture, the second display area 12 displays the second picture and The second picture is projected by the projection component 20 .

When the multi-function display device is in the display state, the first display area 11 and the second display area 12 are all in the working state, and now the data are transmitted to the first display area 11 and the second display area 12 simultaneously, so that the first display area 11 It works simultaneously with the second display area 12 and displays the same picture, so that the display screen 10 realizes the display function. And when the multifunctional display device is in the projection state, the data is only transmitted to the second display area 12 at this time, the light beam emitted by the second display area 12 can be used as a projection light source, and the light emitted by the second display area 12 enters the In the projection assembly 20, to realize the function of projection. When the multi-function display device is in the projection plus display state, the first display area 11 displays the first picture, and the second display area 12 displays the second picture. The first picture and the second picture may be the same or different. But in the state of projection and display, the second picture is a complete picture, not a part of the first picture. In this way, it can be realized that one display screen 10 can realize the function of display and the function of projection at the same time.

Specifically, when the multifunctional display device is in the display state, the second LED chips 14 in the second display area 12 are controlled so that several adjacent second LED chips 14 are displayed together as a sub-pixel of the screen, so that the second display The size of a pixel displayed in the area 12 is equal to the size of a pixel displayed in the first display area 11 , so that the images displayed in the first display area 11 and the second display area 12 can be spliced into a complete image.

As shown in FIG. 5 , the area of the first display region 11 is larger than the area of the second display region 12 . In this way, most of the area of the display screen 10 is used for display, and only a small part of the area is used for projection, which can ensure the display function of the display screen 10 . At the same time, the area of the light source required by the projection assembly 20 is also relatively small, which is beneficial for all light beams emitted by the second display area 12 to enter into the projection assembly 20 .

As shown in FIG. 5 , the second display area 12 is located at the edge of the display screen 10 . Since the projection assembly 20 is installed on the display screen 10 , and at least a part of the projection assembly 20 is disposed opposite to the second display area 12 , the light beam emitted by the second display area 12 enters the projection assembly 20 . Setting the second display area 12 at the edge of the display screen 10 is convenient for installing the projection assembly 20 and the display screen 10 together, and the projection assembly 20 will not block the first display area 11, ensuring that the first display area 11 works stability.

It should be noted that there are two cases where the second display area 12 is located at the edge of the display screen 10 . One case is that the second display area 12 is connected to the side wall of the display screen 10 . Another situation is: there is a certain distance between the second display area 12 and the side walls of the display screen 10, but the minimum distance between the second display area 12 and all the side walls of the display screen 10 is greater than that of the second display area 12. 12 to the center point of the display screen 10 is small to ensure that the second display area 12 is close to the edge of the side corresponding to the second display area 12 on the display screen 10 relative to the center of the display screen 10 .

Specifically, the projection assembly 20 is detachably connected to the display screen 10 . This arrangement is convenient for the maintenance and replacement of the projection assembly 20, and when the projection assembly 20 is disassembled when the multi-function display device is in the display state, the projection assembly 20 no longer blocks the second display area 12, so that the first display area 11 and the second display area Area 12 can display a complete picture.

Specifically, the LED chips in the first display area 11 are different from the LED chips in the second display area 12 . By setting the LED chips in the first display area 11 differently from the LED chips in the second display area 12, the second display area 12 can be used for projection.

It should be noted that not all LED chips can be used for projection, so the LED chips in the second display area 12 are chips that can be used for both projection and display.

Specifically, the display screen 10 includes a first LED chip 13 and a second LED chip 14, the first LED chip 13 is set in the first display area 11; the second LED chip 14 is set in the second display area 12, the first LED chip The size of the chip 13 is larger than the size of the second LED chip 14 . This setting reduces the production cost as much as possible while ensuring the normal operation of the multi-functional display device.

Specifically, the first LED chip 13 is a mini-led chip, and the second LED chip 14 is a micro-led chip. The light emitted by the second LED chip 14 can be used as a projection light source.

Certainly, the size of the first LED chip 13 and the second LED chip 14 may be the same, for example, both are micro-led chips, and the size of the micro-led chips is small and the display accuracy is high.

As shown in Figures 1, 2, 6 and 7, the projection assembly 20 includes a projection box 21 and a projection lens assembly 24, the projection box 21 has an optical cavity 22 and a mounting groove 23, and the optical cavity 22 communicates with the mounting groove 23, showing The screen 10 is located in the installation groove 23 , and the display surface of the display screen 10 faces the optical cavity 22 ; the projection lens assembly 24 is located in the optical cavity 22 to project the light emitted by the display screen 10 onto the projection screen. The projection lens assembly 24 is accommodated in the projection box 21, and the projection box 21 forms protection for the projection lens assembly 24 to ensure the stable operation of the projection lens assembly 24. At the same time, the projection box 21 can reduce the incidence of external light sources on the projection lens assembly 24, greatly reducing the The generation of stray light is reduced, and the imaging definition of the projection lens assembly 24 is increased. The display screen 10 is inserted into the installation groove 23, so that the projection assembly 20 and the display screen 10 are installed, and at the same time, the second display area 12 enters the projection box 21, and the light emitted by the second display area 12 can be directed into the projection lens assembly 24 Realize the projection.

As shown in Fig. 1, Fig. 2, Fig. 6 and Fig. 7, at least a part of the mounting groove 23 overlaps with the optical cavity 22, the mounting groove 23 is U-shaped, and a groove side wall of the mounting groove has a groove communicating with the optical cavity 22 Opening 25. An opening 25 is provided on a groove side wall of the installation groove 23, so that the second display area 12 is exposed to the opening 25 after being installed in the installation groove 23, so that the light emitted by the second display area 12 can be directed to the projection lens assembly 24 on. And the other side wall of installation groove 23 abuts against the back side of display screen 10, so that display screen 10 can be inserted in the installation groove 23.

In the specific embodiment shown in FIG. 2 and FIG. 7 , the projection assembly 20 further includes a light-transmitting member 26, and the light-transmitting member 26 is arranged at the opening 25 to close the opening 25, but can ensure that the light emitted by the second display area 12 Light can enter the optical cavity 22 .

In the specific embodiment shown in FIG. 4 , a side wall of the optical cavity 22 has a projection hole 28 , at least a part of the projection lens assembly 24 is arranged on the projection hole 28 , and the projection hole 28 and the mounting groove 23 are located opposite to the opening 25 on both sides. The projection hole 28 is a hole communicating with the outside, so that the projection lens assembly 24 can project light onto the projection screen to realize the projection function. The projection hole 28 and the mounting groove 23 are located on opposite sides of the opening 25 , so that the light emitted by the projection assembly 20 is projected to the opposite side of the display screen 10 .

In the specific embodiment shown in FIG. 2 , the projection hole 28 is arranged opposite to the opening 25, the projection lens assembly 24 only includes the projection lens 242, and the projection lens 242 is arranged opposite to the second display area 12, so that the second display The light emitted by the area 12 can directly strike the projection lens 242, and the projection lens 242 directly projects the light to complete the projection.

Of course, in a specific embodiment not shown in the figure, the projection hole 28 and the mounting groove 23 are located on opposite sides of the opening 25, but the projection hole 28 and the opening 25 are not directly opposite to each other. After changing the propagation direction of the light beam emitted by the second display area 12 , the lens group 241 can change the propagation direction of the light so that all the light can be directed to the projection lens 242 on the projection hole 28 .

In the specific embodiment shown in FIGS. 6 and 7 , a side wall of the optical cavity 22 has a projection hole 28 , at least a part of the projection lens assembly 24 is arranged on the projection hole 28 , and the projection hole 28 and the mounting groove 23 are positioned at the opening. 25 on the same side. The projection hole 28 is a hole communicating with the outside, so that the projection lens assembly 24 can project light onto the projection screen to realize the projection function. The projection hole 28 and the mounting groove 23 are located on the same side of the opening 25 , so that the light emitted by the projection assembly is projected to the side where the display screen 10 is located.

In the specific embodiment shown in Fig. 6 and Fig. 7, the projection hole 28 and the opening 25 cannot be directly arranged, and the projection lens assembly 24 includes a lens group 241 and a projection lens 242, and the lens group 241 is arranged in the optical cavity 22; The lens 242 is disposed on the projection hole 28 , and the lens group 241 reflects the light entering the optical cavity 22 through the opening 25 to the projection lens 242 . The lens group 241 is used to change the propagation direction of the light beam emitted from the second display area 12 , so that all the light beam can be directed to the projection lens 242 on the projection hole 28 .

Specifically, the lens group 241 may include an optical system composed of a collimating lens, a mirror, and the like.

In the specific embodiment shown in FIG. 7 , the projection hole 28 is located below the mounting groove 23 , and the lens group 241 includes a collimator lens 243 , a first reflector 244 and a second reflector 245 , and the collimator lens 243 and the opening 25 Relatively disposed, the light emitted from the second display area 12 is collimated. The first reflector 244 is disposed on the light output side of the collimator lens 243 , the second reflector 245 is located on the light output side of the first reflector 244 , and the second reflector 245 is located on the light input side of the projection lens 242 . The collimating lens 243 collimates the light to the first reflector 244 , the first reflector 244 reflects the light to the second reflector 245 , and the second reflector 245 reflects the light to the projection lens 242 .

Specifically, the projection assembly 20 further includes a magnetic attraction 27 , and the magnetic attraction 27 is disposed on the other groove side wall of the installation groove 23 . The magnetic suction part 27 is arranged opposite to the opening 25. After the display screen 10 is inserted into the installation groove 23, the magnetic suction part 27 is adsorbed on the back side of the installation groove, so that the projection assembly 20 is magnetically connected to the display screen 10, which is convenient for the projection assembly. 20 and the disassembly and assembly of the display screen 10.

In the specific embodiment shown in FIG. 2 and FIG. 7 , the back of the display screen 10 has a magnetic component 15 that cooperates with the magnetic component 27 , so that the magnetic component 27 and the magnetic component 15 are attracted together.

In an unillustrated embodiment, the multi-function display device has a display state, a projection state, and a projection plus display state. When the multi-function display device is in the display state, only the first display area 11 is displayed, and the multi-function display device is in the projection state. , only the second display area 12 is displayed and projected by the projection assembly 20. When the multi-function display device is in the projection plus display state, the first display area 11 displays the first picture, the second display area 12 displays the second picture and the second picture projected by the projection assembly 20;

When the multi-function display device is in the display state, the first display area 11 is in the working state. At this time, the data is transmitted to the first display area 11, so that the first display area 11 works and displays the picture at the same time, so that the display screen 10 realizes the display function . And when the multifunctional display device is in the projection state, the data is only transmitted to the second display area 12 at this time, the light beam emitted by the second display area 12 can be used as a projection light source, and the light emitted by the second display area 12 enters the In the projection assembly 20, to realize the function of projection. When the multi-function display device is in the projection plus display state, the first display area 11 displays the first picture, and the second display area 12 displays the second picture. The first picture and the second picture may be the same or different. But in the state of projection and display, the second picture is a complete picture, not a part of the first picture. In this way, it can be realized that one display screen 10 can realize the function of display and the function of projection at the same time.

The display driving method is applied to the above-mentioned multi-function display device. After the projection assembly 20 of the multi-function display device is separated from the display screen 10 of the multi-function display device, the first display area 11 of the display screen 10 is lit, and the first display area 11 displays The first picture: the second display area 12 of the display screen 10 is turned on, the second display area 12 displays the second picture, and the first picture and the second picture are spliced to form an entire display picture. After the projection assembly 20 is separated from the display screen 10, the projection assembly 20 will not block the second display area 12, adjust the multi-function display device to the display state, and light the first display area 11 and the second display area 12, so that the first display The area 11 and the second display area 12 display the first picture and the second picture respectively, and the displayed content of the first picture and the second picture is different and spliced into a whole display picture, so that each position on the display screen 10 can be displayed, and Shown is a complete picture.

The projection driving method is applied to the above-mentioned multi-function display device. After the projection assembly 20 of the multi-function display device is connected to the display screen 10 of the multi-function display device, the second display area 12 of the display screen 10 is lit, and the second display area 12 displays The projection screen is projected into the projection assembly 20 for projection, and the projection screen is projected onto the projection screen. After the projection assembly 20 is connected to the display screen 10, the multi-function display device is adjusted to the projection state, and the second display area 12 is lighted, so that the second display area 12 can display a projected picture, and the projected picture is projected to the projection screen through the projection assembly 20. screen to achieve the purpose of projection, so that the above-mentioned multifunctional display device can realize the projection function.

It should be understood that the application of the present application is not limited to the above examples, and those skilled in the art can make improvements or changes based on the above descriptions, and all these improvements and changes should belong to the protection scope of the appended claims of the present application.

Claims

A multifunctional display device, characterized in that it comprises:

A display screen (10), the display screen (10) has a first display area (11) and a second display area (12), the area of the first display area (11) is larger than that of the second display area (12) ), and the second display area (12) is located at the edge of the display screen (10);

A projection assembly (20), the projection assembly (20) is arranged on the display screen (10) and corresponds to the second display area (12), and is used for displaying an image of the second display area (12) projected onto a projection screen.
The multifunctional display device according to claim 1, characterized in that, the projection assembly (20) is detachably connected to the display screen (10).
The multifunctional display device according to claim 1, wherein the display screen (10) comprises:

a first LED chip (13), the first LED chip (13) is arranged in the first display area (11);

A second LED chip (14), the second LED chip (14) is arranged in the second display area (12), and the size of the first LED chip (13) is larger than that of the second LED chip (14). )size of.
The multifunctional display device according to claim 1, wherein the projection assembly (20) comprises:

A projection box (21), the projection box (21) has an optical cavity (22) and a mounting groove (23), the optical cavity (22) communicates with the mounting groove (23), and the display screen (10) Located in the installation groove (23), and the display surface of the display screen (10) faces the optical cavity (22);

A projection lens assembly (24), the projection lens assembly (24) is located in the optical cavity (22) to project light emitted by the display screen (10) onto the projection screen.
The multifunctional display device according to claim 4, characterized in that, the installation groove (23) overlaps with at least a part of the optical cavity (22), the installation groove (23) is U-shaped, and the One groove side wall of the installation groove has an opening (25) communicating with the optical cavity (22).
The multifunctional display device according to claim 5, wherein a projection hole (28) is provided on a side wall of the optical cavity (22), and at least a part of the projection lens assembly (24) is arranged in the projection hole (28), the projection hole (28) and the mounting groove (23) are located on opposite sides of the opening (25).
The multifunctional display device according to claim 5, wherein a projection hole (28) is provided on a side wall of the optical cavity (22), and at least a part of the projection lens assembly (24) is arranged in the projection hole (28), the projection hole (28) and the mounting groove (23) are located on the same side of the opening (25).
The multifunctional display device according to claim 7, wherein the projection lens assembly (24) comprises:

a lens group (241), the lens group (241) is arranged in the optical cavity (22);

a projection lens (242), the projection lens (242) is arranged on the projection hole (28), and the lens group (241) directs the light entering the optical cavity (22) through the opening (25) reflected onto the projection lens (242).
The multifunctional display device according to claim 8, characterized in that, the lens group (241) includes at least one of a collimating mirror and a reflecting mirror.
The multifunctional display device according to claim 8, wherein the lens group (241) comprises:

A collimating lens (243), the collimating lens (243) is arranged opposite to the opening (25);

a first reflector (244), the first reflector (244) is located on the light exit side of the collimator lens (243);

The second reflector (245), the second reflector (245) is located on the light exit side of the first reflector (244), the light emitted by the second display area (12) passes through the collimating lens ( 243) after being collimated, it is directed to the first reflector (244), reflected to the second reflector (245) by the first reflector (244), and reflected by the second reflector (245) into the projection lens (242).
The multifunctional display device according to claim 5, characterized in that, the projection assembly (20) further comprises a magnetic attraction (27), and the magnetic attraction (27) is arranged in the mounting groove (23) on the other side of the tank.
The multifunctional display device according to claim 11, characterized in that, the display screen (10) has a magnetic piece (15), and the magnetic piece (17) is magnetically matched with the magnetic piece (27).
The multifunctional display device according to claim 5, characterized in that, the projection assembly (20) further comprises a light-transmitting member (26), and the light-transmitting member (26) is arranged at the opening (25).
A display driving method, characterized in that the display driving method is applied to the multifunctional display device according to claim 1,

After the projection assembly (20) of the multi-function display device is separated from the display screen (10) of the multi-function display device,

Lighting up the first display area (11) of the display screen (10), the first display area (11) displays a first picture;

The second display area (12) of the display screen (10) is turned on, the second display area (12) displays a second picture, and the first picture and the second picture are spliced to form an entire display picture.
A projection driving method, characterized in that the projection driving method is applied to the multifunctional display device according to claim 1,

After the projection assembly (20) of the multi-function display device is connected with the display screen (10) of the multi-function display device,

Lighting up the second display area (12) of the display screen (10), the second display area (12) displays a projection picture, and the projection picture is injected into the projection assembly (20) for projection, and the The projected image is projected onto a projection screen.