CN117597917A

CN117597917A - Projection display device, method and system

Info

Publication number: CN117597917A
Application number: CN202280047122.9A
Authority: CN
Inventors: 梁倩; 肖纪臣; 吴超
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-06-30
Filing date: 2022-03-24
Publication date: 2024-02-23
Also published as: WO2023273435A1; CN113489960A

Abstract

The application provides projection display equipment, a projection display method and a projection display system. The image processing module can decompose the image data of the image to be displayed, and respectively send the obtained image data of the plurality of sub-images to the plurality of display control modules so as to enable the received data to be converted into control signals, the digital micro-mirror device outputs display signals of the sub-images based on the control signals, and the synthesis prism synthesizes the display signals of the plurality of sub-images into the display signals of the image to be displayed. The equipment of this application adopts a plurality of digital micromirror devices, and the display signal of a plurality of sub-images of output adopts synthetic prism to be used for projection display with the display signal of its synthetic image that waits to show again for projection display adopts a plurality of digital micromirror devices can promote projection display's resolution, thereby realizes high resolution display, and then effectively improves projection display image quality.

Description

Projection display device, method and system

Cross Reference to Related Applications

The present application claims priority from chinese patent office, application No. 202110738300.X, filed at 30, 6, 2021, entitled projection display apparatus, method, and system, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a projection display device, a method, and a system.

Background

With the development of display technology, laser projection is increasingly used in daily life. Laser projection refers to an image transmitted from a laser light source, which is enlarged and displayed on a projection screen by an image display module in a projection display apparatus.

However, as the size of the projection screen is continuously increased, the projection is performed by using the projection display device in the related art, and the image quality of the projection display device cannot meet the display requirement, so how to improve the image quality of the projection display is a problem to be solved.

Disclosure of Invention

In a first aspect, embodiments of the present application provide a projection display device, including: the system comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthetic prism; the display control modules are connected with the digital micromirror devices in a one-to-one correspondence manner; the lenses are positioned between the synthetic prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthetic prism is arranged corresponding to the plurality of lenses; the image processing module is used for decomposing the image data of the image to be displayed and respectively transmitting the image data of a plurality of sub-images obtained by decomposition to the display control modules; the number of the sub-images is consistent with that of the display control modules;

The display control modules are connected with the image processing module and are used for converting received image data of the sub-images into control signals; the digital micro-mirror device is connected with the corresponding display control module and is used for outputting a display signal of the sub-image according to the control signal output by the corresponding display control module;

the lens is used for transmitting the display signals of the sub-images output by the corresponding digital micro-mirror devices and transmitting the display signals to the synthesis prism; the synthesis prism is used for synthesizing the display signals of the plurality of sub-images transmitted by the plurality of lenses into the display signals of the image to be displayed, and the display signals of the image to be displayed are used for projecting and displaying the image to be displayed.

In a second aspect, embodiments of the present application provide a projection display system, including a projection display device as described in the first aspect, and a screen.

In a third aspect, an embodiment of the present application provides a projection display method, which is applied to a projection display device, where the projection display device includes: the system comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthetic prism; the display control modules are connected with the digital micromirror devices in a one-to-one correspondence manner; the lenses are positioned between the synthetic prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthetic prism is arranged corresponding to the plurality of lenses;

The method comprises the following steps:

the image processing module is used for decomposing the image data of the image to be displayed and respectively transmitting the image data of a plurality of sub-images obtained by decomposition to the display control modules; each display control module converts the received image data of the sub-images into control signals; each digital micromirror device outputs a display signal of the sub-image according to the control signal output by the display control module connected with the digital micromirror device; the lens transmits the display signals of the sub-images output by the corresponding digital micro-mirror devices to the synthesizing prism; and the synthesis prism synthesizes the display signals of the plurality of sub-images transmitted by the plurality of lenses into the display signal of the image to be displayed, and the display signal of the image to be displayed is used for projecting and displaying the image to be displayed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram schematically illustrating an operation scenario between a laser television and a control device according to an exemplary embodiment;

fig. 2 is a block diagram schematically showing the configuration of the control apparatus 100 according to the exemplary embodiment;

Fig. 3 is a schematic diagram schematically showing a hardware configuration of a laser television 200 according to an exemplary embodiment;

fig. 4 is a schematic structural diagram of a projection display device according to an embodiment of the present application;

fig. 5 is a schematic diagram of an optical path of a display signal for synthesizing an image to be displayed according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a projection display device according to another embodiment of the present disclosure;

fig. 7 is a schematic diagram of framing processing provided in an embodiment of the present application;

fig. 8 (a) is an image schematic diagram of a sub-display signal corresponding to a sub-image provided in an embodiment of the present application;

fig. 8 (b) is an image schematic diagram of a sub-display signal corresponding to a sub-image provided in an embodiment of the present application;

fig. 8 (c) is an image schematic diagram of a sub-display signal corresponding to a sub-image provided in an embodiment of the present application;

fig. 8 (d) is an image schematic diagram of a sub-display signal corresponding to a sub-image provided in an embodiment of the present application;

fig. 9 (a) is an image schematic diagram of a sub-display signal of an image to be displayed according to an embodiment of the present application;

fig. 9 (b) is an image schematic diagram of a sub-display signal of an image to be displayed according to an embodiment of the present application;

fig. 9 (c) is an image schematic diagram of a sub-display signal of an image to be displayed according to an embodiment of the present application;

Fig. 9 (d) is an image schematic diagram of a sub-display signal of an image to be displayed according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a visually presented image to be displayed provided in an embodiment of the present application;

fig. 11 is a schematic diagram of dithering of a galvanometer module according to an embodiment of the present disclosure;

fig. 12 (a) is a schematic diagram of an image data decomposition processing result provided in the embodiment of the present application;

fig. 12 (b) is a schematic diagram of an image data decomposition processing result provided in the embodiment of the present application;

fig. 13 is a schematic diagram of an image data stitching result provided in an embodiment of the present application;

FIG. 14 is a schematic view of a projection display system according to an embodiment of the present disclosure;

fig. 15 is a flowchart of a projection display method according to an embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

With the development of display technology, laser projection is widely used in the fields of business, teaching and the like. Laser projection uses a projection display device to effect a projection display on a screen, such as a laser television. The most important working module in projection display equipment is an image display module, the module comprises a digital micro-mirror device, 80 to 100 tens of thousands of lenses are closely arranged on the digital micro-mirror device, each lens can be turned over independently in the positive and negative directions, and a light source directly forms an image on a screen through reflection of the lenses, wherein one lens represents one pixel, namely, light reflected by one lens is one pixel point of the finally formed image. In the case where the screen size is fixed, the more pixels of the image, the higher the resolution of the image (the number of pixels per unit area), the better the image quality of the projection display.

However, as the demand for the size of the projection screen is continuously increasing, the number of pixels of the image is not changed by adopting the projection display device in the related art for projection, but the number of pixels in the unit area, that is, the resolution is low, so that the image quality of the projection display cannot meet the display demand.

The projection display device, method and system provided by the application aim to solve the technical problems in the related art.

The following describes the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

The term "remote control" as used in the various embodiments of the present application refers to a component of an electronic device (such as a display device as disclosed herein) that can typically wirelessly control the electronic device over a relatively short range of distances. The assembly may be connected to the electronic device generally using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WiFi, wireless USB, bluetooth, motion sensors, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hardware in a general remote control device with a touch screen user interface.

A schematic diagram of an operational scenario between a laser television and a control device according to an exemplary embodiment is illustrated in fig. 1. As shown in fig. 1, a user can operate a laser television 200 by controlling the apparatus 100.

The control device 100 may be a remote controller 100A, which may communicate with the laser tv 200 through infrared protocol communication, bluetooth protocol communication, zigBee protocol communication, or other short-range communication, and is used to control the laser tv 200 through wireless or other wired modes. The user may control the laser television 200 by inputting user instructions through keys, voice input, control panel input, etc. on the remote control 100A. Such as: the user can input corresponding control commands through a screen up and down key, a volume up and down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, an on/off key, etc. on the remote controller 100A, thereby realizing the function of controlling the laser television 200.

The control apparatus 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, etc., which may communicate with the laser television 200 through a local network (LAN, local Area Network), a wide area network (WAN, wide Area Network), a wireless local area network (WLAN, wireless Local Area Network), or other networks, and control the laser television 200 through an application program corresponding to the laser television 200. For example, the laser television 200 is controlled using an application running on a smart device. The application may provide various controls to the User through an intuitive User Interface (UI) on a screen associated with the smart device.

For example, the mobile terminal 100B and the laser television 200 may each be provided with a software application, so that connection communication between the two may be implemented through a network communication protocol, thereby achieving the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 100B and the laser television 200 can be made to establish a control instruction protocol, a remote control keyboard is synchronized to the mobile terminal 100B, and the function of controlling the laser television 200 is realized by controlling a user interface on the mobile terminal 100B; the audio and video content displayed on the mobile terminal 100B may also be transmitted to the laser television 200, so as to realize a synchronous display function.

As shown in fig. 1, the laser television 200 may also be in data communication with the server 300 via a variety of communication means. In various embodiments of the present application, the laser television 200 may be permitted to make a wired or wireless communication connection with the server 300 via a local area network, a wireless local area network, or other network. The server 300 may provide various content and interactions to the laser television 200. By way of example, the laser television 200 receives software program updates by sending and receiving information, and by interacting with an electronic program guide (EPG, electronic Program Guide), or accessing a remotely stored digital media library. The servers 300 may be one group, may be multiple groups, and may be one or more types of servers. Other web service content such as video on demand and advertising services are provided through the server 300.

The laser television 200 includes a screen 201 and a projection device 202 (i.e., a projection display device). The projection device 202 obtains the content to be displayed, and projects the content to be displayed to the screen 201 by adopting an optical projection imaging mode, so that the screen 201 displays the content to be displayed. The particular laser television type, size, resolution, etc. are not limited, and those skilled in the art will appreciate that the laser television 200 may be modified in performance and configuration as desired.

The laser tv 200 may additionally provide an intelligent network tv function of a computer support function in addition to the broadcast receiving tv function. Examples include web tv, smart tv, internet Protocol Tv (IPTV), etc. In some embodiments, the laser television may not have broadcast receiving television functionality.

In other examples, more functions may be added or the above functions may be reduced. The function of the laser television is not particularly limited in this application.

A block diagram of the configuration of the control apparatus 100 according to the exemplary embodiment is exemplarily shown in fig. 2. As shown in fig. 2, the control device 100 includes a controller 110, a communicator 130, a user input/output interface 140, a memory 190, and a power supply 180.

The control device 100 is configured to control the laser television 200, receive an input operation instruction from a user, and convert the operation instruction into an instruction that the laser television 200 can recognize and respond to, so as to perform an interaction between the user and the laser television 200. Such as: the user responds to the channel addition and subtraction operation by operating the channel addition and subtraction key on the control apparatus 100. And the following steps: the user operates a screen up-down key on the control device 100, and the laser television 200 moves up or down in response to the control screen. It should be noted that, in the present application, "up" or "down" is with respect to the installation position of the screen, it is understood that the direction in which the "up" or "down" is located is different based on the different installation positions of the screen. For example, for a ceiling-mounted screen, "up" and "down" refer to a change in the height direction of the screen, while for a vertical side wall-mounted screen, the directions of "up" and "down" are changes in the horizontal direction.

In some embodiments, the control apparatus 100 may be a smart device. Such as: the control device 100 may install various applications for controlling the laser television 200 according to the user's needs.

In some embodiments, as shown in fig. 1, the mobile terminal 100 or other intelligent electronic device may function similarly to the control apparatus 100 after installing an application for manipulating the laser television 200. Such as: the user may implement the functions of the physical keys of the control apparatus 100 by installing an application, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 100B or other intelligent electronic device.

The controller 110 includes a processor 112, RAM 113 and ROM 114, a communication interface, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication collaboration among the internal components and the external and internal data processing functions.

The communicator 130 performs communication of control signals and data signals with the laser television 200 under the control of the controller 110. Such as: the received user input signal is transmitted to the laser television 200. The communicator 130 may include at least one of a WIFI module 131, a bluetooth module 132, an NFC module 133, and the like.

A user input/output interface 140, wherein the input interface includes at least one of a microphone 141, a touch pad 142, a sensor 143, keys 144, a camera 145, etc. Such as: the user can realize the user instruction input function through actions such as voice, touch, gesture, pressing and the like, and the input interface converts the received analog signals into digital signals and converts the digital signals into corresponding instruction signals to be sent to the laser television 200.

The output interface includes an interface that transmits the received user instruction to the laser television 200. In some embodiments, an infrared interface may be used, as well as a radio frequency interface. Such as: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is transmitted to the laser television 200 through the infrared transmitting module. And the following steps: when the radio frequency signal interface is used, the user input instruction is converted into a digital signal, and then the digital signal is modulated according to a radio frequency control signal modulation protocol and then transmitted to the laser television 200 through the radio frequency transmission terminal.

In some embodiments, the control device 100 includes at least one of a communicator 130 and an output interface. The control device 100 is provided with a communicator 130 such as: the modules such as WIFI, bluetooth, NFC, etc. can send the user input instruction to the laser television 200 through the WIFI protocol, or the bluetooth protocol, or the NFC protocol code.

A memory 190 for storing various operation programs, data and applications for driving and controlling the control device 100 under the control of the controller 110. The memory 190 may store various control signal instructions input by a user.

The power supply 180 is configured to provide operation power support for each electrical component of the control device 100 under the control of the controller 110. The power supply 180 may use a battery and associated control circuitry to provide power.

A schematic hardware architecture of the laser television 200 according to an exemplary embodiment is illustrated in fig. 3. For ease of illustration, the laser television 200 of fig. 3 is illustrated with a laser projection device and a liftable screen separately disposed.

As shown in fig. 3, the laser television in the laser television 200 includes: a laser projection device 1 and a liftable screen 2. The laser projection device 1 is used for acquiring a video to be played, specifically, the laser projection device can analyze the video signal to be played into an image signal, and projects the image signal onto a liftable screen to form an image. The liftable screen 2 is used to present a picture to the user.

In this application, in addition to the mode in which the laser projection apparatus and the liftable screen are separately provided, in order to reduce the occupied space, in another arrangement mode, the laser projection apparatus 1 and the liftable screen 2 are integrally formed. As an example, the laser television 200 integrates a laser projection device and a liftable screen into a television cabinet.

Example 1

As the size of the projection screen increases, in order to improve the projection display image quality, it is necessary to improve the resolution of the image, and therefore, a plurality of digital micromirror devices may be provided in the projection display apparatus. Fig. 4 is a schematic structural diagram of a projection display device according to an embodiment of the present application, and as shown in fig. 4, the projection display device according to the present embodiment includes an image processing module 11, a plurality of display control modules 12, a plurality of digital micromirror devices 13, a plurality of lenses 14, and a synthesizing prism 15. Wherein, a plurality of display control modules 12 and a plurality of digital micromirror devices 13 are connected in a one-to-one correspondence. The plurality of lenses 14 are located between the combining prism 15 and the plurality of digital micromirror devices 13, and are disposed in one-to-one correspondence with the plurality of digital micromirror devices 13. The synthetic prism 15 is provided corresponding to the plurality of lenses 14.

In the present embodiment, since a plurality of digital micromirror devices 13 and a plurality of display control modules 12 connected in one-to-one correspondence thereto are provided, accordingly, it is necessary to decompose the image data of the image to be displayed and send to the plurality of display control modules 12, respectively.

Specifically, the image processing module 11 may perform decomposition processing on image data of an image to be displayed, and transmit image data of a plurality of sub-images obtained by the decomposition to the plurality of display control modules 12, respectively. Wherein the number of sub-images corresponds to the number of display control modules 12.

In one example, the image processing module 11 may include a field programmable gate array (Field Programmable Gate Array, abbreviated FPGA). Because the hardware structure of the FPGA is special, the internal structure can be adjusted by utilizing a logic structure file edited in advance, the connection and the position of different logic units are adjusted by utilizing a constraint file, the data line path is properly processed, and the method has good flexibility and adaptability and is convenient to develop and apply. Especially, when processing image data, the FPGA can effectively ensure the decomposition speed of the data.

Next, in order to output the display signal of the sub-image, it is necessary to control the mirror of the digital micromirror device 13 to be inverted, and thus it is necessary to convert the image data of the sub-image into a control signal.

Specifically, the display control modules 12 are all connected with the image processing module 11, and can convert the received image data of the sub-images into control signals and send the control signals to the digital micro-mirror devices 13 correspondingly connected with the image data, so that the digital micro-mirror devices 13 can control the lenses to turn according to the control signals output by the corresponding display control modules 12 and output the display signals of the sub-images.

Wherein the display signal may be an optical signal for projection display. A display signal includes a plurality of pixels.

In one example, the display control module 12 may be an application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short). The device has small volume and high reliability, and can realize rapid conversion of data.

Finally, the lens 14 may transmit the display signal of the sub-image outputted from the corresponding digital micromirror device 13 to the synthesizing prism 15. The synthesizing prism 15 synthesizes the display signals of the plurality of sub-images transmitted through the plurality of lenses 14 into a display signal of an image to be displayed. The display signal of the image to be displayed is used for projecting and displaying the image to be displayed.

For example, in practical applications, if the display signals of the sub-images that each of the digital micromirror devices can output include 2048×2192 pixels, that is, 2048×2192 pixels of each of the sub-images, and if the number of the digital micromirror devices is n, the display signals of the finally synthesized image to be displayed include n×2048×2192 pixels, that is, n×2048×2192 pixels of the image to be displayed, and accordingly, the number of pixels per unit area, that is, the resolution is improved by n times compared with the case of using only one image display module.

Fig. 5 is a schematic diagram of an optical path of a display signal for synthesizing an image to be displayed according to an embodiment of the present application, and as shown in fig. 5, a plurality of lenses 14 are located between the synthesizing prism 15 and the plurality of digital micromirror devices 13, and are disposed in one-to-one correspondence with the plurality of digital micromirror devices 13. The synthetic prism 15 is provided corresponding to the plurality of lenses 14.

In practical applications, the lens 14 may transmit the display signal of the sub-image output by the corresponding digital micromirror device 13 to the synthesizing prism 15. Then, the combining prism 15 may adjust the optical transmission paths of the display signals of the plurality of sub-images transmitted through the plurality of lenses 14, and when the display signals of the sub-images are two, as shown in fig. 5, the combining prism 15 may maintain the optical transmission path of one of the display signals unchanged, and adjust the optical transmission path of the other display signal through one of the reflection interfaces so as to coincide with the optical transmission path of the one display signal maintained unchanged, thereby combining the display signals of the two sub-images into the display signal of the image to be displayed.

In one example, lens 14 may be a total internal reflection (Total Internal Reflection, TIR) lens and combining prism 15 may be a polarizing beam splitting prism (Polarization Beam Splitter, PBS). The TIR lens adopts the principle of total reflection, and can collect light, so that display signals of sub-images can be better transmitted to the synthetic prism, and transmission loss is effectively avoided. The PBS is an optical element for separating horizontal polarization and vertical polarization of light, has the characteristics of small stress, high extinction ratio, good imaging quality, small beam deflection angle and the like, and can be well applied to optical transmission path adjustment in the embodiment of the application.

Fig. 6 is a schematic structural diagram of another projection display device according to the embodiment of the present application, and as shown in fig. 6, the projection display device according to the embodiment further includes a signal receiving module 16 and a codec module 17.

In one possible application scenario, the content to be projected and displayed is video, and based on the basic principle of projection and display, video data of the video to be displayed needs to be converted into image data of an image to be displayed of one frame.

Specifically, the signal receiving module 16 may be used to receive video data of a video to be displayed sent by a signal source and send the video data to the codec module 17 connected thereto, the codec module 16 may perform encoding and decoding processing on the video data to obtain image data of an image to be displayed, where the image data of the image to be displayed may be a differential signal, and send the image data of the image to be displayed to the image processing module 11 connected thereto, so that the image processing module 11 performs decomposition processing on the image data of the image to be displayed.

In one example, the codec module 16 may be a System On Chip (SOC) for short. The SOC is an integrated controller, has small volume and high processing speed, and can rapidly realize encoding and decoding processing of video data. The projection display device provided in this embodiment includes an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses, and a synthetic prism. The image processing module can decompose the image data of the image to be displayed, and respectively send the image data of the sub-images obtained by decomposition to the display control modules, the display control modules convert the received image data of the sub-images into control signals so that the digital micro-mirror device outputs display signals of the sub-images based on the control signals, and then the synthesis prism synthesizes the display signals of the sub-images into display signals for projecting the image to be displayed. That is, in the embodiment of the present application, a plurality of digital micromirror devices are used to output display signals of a plurality of sub-images, and then a synthesizing prism is used to synthesize the display signals of the images to be displayed for projection display.

Example two

On the basis of the first embodiment, in an implementation manner, in order to further improve the resolution of the projection display, the sub-image of each frame may be further subjected to framing processing. Accordingly, the display control module may include a framing module and a processing module.

The framing module is connected with the image processing module and can perform framing processing on the received image data of each frame of sub-image to obtain multi-frame image data corresponding to the sub-image. For example, fig. 7 is a schematic diagram of framing processing provided in the embodiment of the present application, as shown in fig. 7, the left side is a sub-image before framing processing, each cell in the sub-image represents a pixel point, and during framing processing, each pixel point is divided into a plurality of sub-pixel points, for example A, B, C, D, so as to obtain a multi-frame image corresponding to the sub-image shown in the right side. The multi-frame image includes a sub-image composed of all a pixels, a sub-image composed of all B pixels, a sub-image composed of all C pixels, and a sub-image composed of all D pixels. That is, the resolution can be increased by 4 times by the framing process as shown.

Accordingly, in order to output the display signal of the sub-image, the processing module is connected to the framing module, and may convert the multi-frame image data corresponding to the sub-image into corresponding control signals for each frame of sub-image, and send the plurality of control signals to the digital micromirror device connected thereto, where the digital micromirror device may output the display signal of the sub-image according to the plurality of control signals and a predetermined output timing.

The display signals of the sub-images comprise a plurality of sub-display signals corresponding to the sub-images. That is, the sub-display signal corresponding to the sub-pixel constituted by all the a pixels, the sub-display signal corresponding to the sub-pixel constituted by all the B pixels, the sub-display signal corresponding to the sub-pixel constituted by all the C pixels, and the sub-display signal corresponding to the sub-pixel constituted by all the D pixels.

For example, fig. 8 (a), fig. 8 (B), fig. 8 (C), and fig. 8 (D) are schematic image diagrams of sub-display signals corresponding to sub-images provided in the embodiments of the present application, and sequentially output sub-display signals corresponding to sub-images formed by all the a pixels, sub-display signals corresponding to sub-images formed by all the B pixels, sub-display signals corresponding to sub-images formed by all the C pixels, and sub-display signals corresponding to sub-images formed by all the D pixels according to a predetermined output timing, so as to obtain four image diagrams as shown in fig. 8 (a), fig. 8 (B), fig. 8 (C), and fig. 8 (D).

Next, the combining prism may adjust optical transmission paths of display signals of the plurality of sub-images transmitted through the plurality of lenses to combine the display signals of the images to be displayed. The display signals of the images to be displayed comprise a plurality of sub-display signals corresponding to the images to be displayed, and each sub-display signal corresponding to the images to be displayed is obtained by synthesizing sub-display signals corresponding to the sub-images output by a plurality of digital micro-mirror devices at the same time.

Fig. 9 (a), 9 (B), 9 (C) and 9 (D) are schematic image diagrams of sub-display signals of an image to be displayed provided in the embodiments of the present application, and if two digital micromirror devices are used, each sub-display signal corresponding to the image to be displayed is obtained by synthesizing sub-display signals corresponding to sub-images output by the two digital micromirror devices at the same time, that is, sub-display signals corresponding to sub-images composed of all pixels a, B, C or D output by the two digital micromirror devices are obtained by synthesizing sub-display signals corresponding to sub-images composed of all pixels a, B, C or D, accordingly, the schematic image diagrams shown in fig. 9 (a), 9 (B), 9 (C) and 9 (D) can be obtained.

It should be noted that, fig. 10 is a schematic diagram of a visual representation of an image to be displayed provided in the embodiment of the present application, and although the sub-display signals for synthesizing the display signals of the image to be displayed are output according to a predetermined output timing, the obtained image to be displayed is also displayed according to the predetermined timing, but because the whole output process is continuous and rapid, the final visual representation of the image to be displayed is a superimposed image containing A, B, C, D pixels, as shown in fig. 10.

By the mode, the resolution of projection display is further improved.

On the basis of the above embodiment, since the positions of the pixels in each frame of the multi-frame image corresponding to the sub-image are different after the framing process is performed, for example, when each pixel in the sub-image is divided into A, B, C, D sub-pixels, the positions of each sub-pixel are different, as shown in fig. 7, the position of the pixel a is at the upper left corner, the position of the pixel B is at the upper right corner, the position of the pixel C is at the lower right corner, and the position of the pixel D is at the lower left corner.

Therefore, the relative positions of the sub-images each composed of all A, B, C, D pixels also vary. For example, a sub-image composed of all B pixels is located at the right side of a sub-image composed of all a pixels, and a sub-image composed of all C pixels is located at the lower side of a sub-image composed of all B pixels. Accordingly, the relative positions between the synthetically obtained images to be displayed may also vary. Therefore, in order to ensure that all pixels of each image to be displayed can be projected and displayed, a galvanometer module is required to be arranged corresponding to the synthesizing prism. The galvanometer module can execute corresponding angle rotation based on the output time sequence of the display signals of each frame of the image to be displayed, so that a plurality of sub-display signals corresponding to the sub-images are transmitted and output through the galvanometer module.

In one example, the galvanometer module may be a 4-way galvanometer that can be rotated to produce a change in the relative position of each frame of image to be displayed, side-to-side, up-and-down, i.e., a dithering process.

Fig. 11 is a schematic diagram of dithering processing of a galvanometer module according to an embodiment of the present application, as shown in fig. 11, if an output timing of a display signal of each frame of an image to be displayed is that a sub-display signal of an image to be displayed composed of all a pixels, a sub-display signal of an image to be displayed composed of all B pixels, a sub-display signal of an image to be displayed composed of all C pixels, and a sub-display signal of an image to be displayed composed of all D pixels are sequentially output, the galvanometer module 18 may perform a corresponding angular rotation after outputting the sub-display signal corresponding to the sub-display signal composed of all a pixels according to the output timing, so that the sub-display signal corresponding to the sub-display signal composed of all B pixels is subject to dithering processing, and the sub-display signal whose position is changed rightward with respect to the sub-display signal corresponding to the sub-display signal composed of all a pixels is transmitted.

Accordingly, after outputting the sub-display signals corresponding to the sub-pixels composed of all the B pixels, the galvanometer module 18 performs a corresponding angular rotation so that the sub-display signals corresponding to the sub-pixels composed of all the C pixels are subjected to a dithering process, and output with transmission, the positions of the sub-display signals being changed downward with respect to the sub-display signals corresponding to the sub-pixels composed of all the B pixels. Accordingly, the sub-display signals corresponding to the sub-pixels formed by all the D pixel points are also subjected to the corresponding dithering process. It should be noted that, for different sub-display signals, the output direction may be determined based on the relative positions of the sub-pixels, for example, the above-mentioned example B sub-pixel is relatively located on the right side of the a sub-pixel, so that the sub-display signal corresponding to the B sub-pixel is shifted rightward when performing the dithering process.

In addition, the sub-display signals of the sub-images are dithered by the galvanometer module, so that all pixel points of each image to be displayed can be projected and displayed, and the integrity and the normal display of the images are ensured.

Example III

On the basis of the first embodiment, in one possible implementation manner, the number of the display control modules or the digital micromirror devices is two. Accordingly, the image processing module performs decomposition processing on image data of an image to be displayed, including: the image processing module may decompose image data of the image to be displayed according to the first policy.

Fig. 12 (a) and fig. 12 (b) are schematic diagrams of image data decomposition processing results provided in the embodiments of the present application, and as shown in fig. 12 (a) and fig. 12 (b), the first policy may include horizontal average division or vertical average division. Fig. 12 (a) shows a horizontal average division into two parts, namely an upper part 10 and a lower part 20, and fig. 12 (b) shows a vertical average division into two parts, namely a left part 10 and a right part 20.

By the method, the average division can ensure that the quantity of the image data of the sub-images received by each image display module is consistent, so that the processing speed of projection display can be ensured.

In one embodiment, the image processing module performs decomposition processing on image data of an image to be displayed, including: the image processing module can determine the dividing line of the image to be displayed, and decompose the image data of the image to be displayed according to the dividing line to obtain the image data of a plurality of sub-images.

In order to avoid missing the image data to be displayed when synthesizing the image to be displayed, the image data of the adjacent sub-images all comprise the image data at the corresponding dividing line.

Correspondingly, the synthesizing prism can splice the display signals of the sub-images output by the image display modules based on the dividing lines to obtain the display signals of the images to be displayed, and the display signals of the adjacent sub-images at the corresponding dividing lines are overlapped. Fig. 13 is a schematic diagram of an image data stitching result provided in the embodiment of the present application, and as shown in fig. 13, a middle black shadow portion is a display signal overlapping portion.

In addition, when the image data of the image to be displayed is decomposed, the image data of the adjacent sub-images all comprise the image data corresponding to the dividing line, so that the defect of the image data to be displayed caused when the image to be displayed is synthesized is avoided, and the effect of projection display is effectively ensured.

Example IV

Fig. 14 is a schematic diagram of a projection display system according to an embodiment of the present application, and as shown in fig. 14, the projection display system according to an embodiment of the present application includes a projection display device according to any other embodiment of the present application and a screen 19. In practical application, when the number of the display control modules 12 or the number of the digital micromirror devices 13 is two, the image processing modules 11 are respectively connected with the two display control modules 12, so that the image data of the image to be displayed can be decomposed, and the specific decomposition method is described in the above embodiments, which is not described herein. Next, the image processing module 11 may transmit the image data of the two sub-images obtained by the decomposition to the two display control modules 12, respectively.

Each display control module 12 may convert the received image data of the sub-image into a control signal, so that the digital micro-mirror device 13 outputs a display signal of the sub-image according to the control signal output by the corresponding display control module 12, and sends the display signal to the lens 14, and the lens 14 may transmit the display signal of the sub-image output by the corresponding digital micro-mirror device 13 to the synthesizing prism 15, so that the synthesizing prism 15 synthesizes the display signals of the plurality of sub-images transmitted by the plurality of lenses to synthesize the display signal of the image to be displayed. The display signal of the image to be displayed is output to the screen 19, so that the projection display of the image to be displayed can be realized.

In one example, the screen is a liftable screen, so that the projection display effect can be better ensured.

Example five

Fig. 15 is a flowchart of a projection display method provided in an embodiment of the present application, and as shown in fig. 15, the projection display method provided in an embodiment of the present application is applied to a projection display device provided in any other embodiment of the present application, where the projection display device includes: the system comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthetic prism; the display control modules are connected with the digital micromirror devices in a one-to-one correspondence manner; the lenses are positioned between the synthetic prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthetic prism is arranged corresponding to the plurality of lenses.

Accordingly, the method comprises the steps of:

step 101, the image processing module performs decomposition processing on the image data of the image to be displayed, and sends the image data of a plurality of sub-images obtained by decomposition to the plurality of display control modules respectively.

Step 102, each display control module converts the received image data of the sub-image into a control signal.

Step 103, each digital micro-mirror device outputs a display signal of the sub-image according to the control signal output by the display control module connected with the digital micro-mirror device.

Step 104, the lens transmits the display signals of the sub-images output by the corresponding digital micro-mirror devices to the synthesizing prism.

And 105, the synthesizing prism synthesizes the display signals of the plurality of sub-images transmitted by the plurality of lenses into the display signal of the image to be displayed, wherein the display signal of the image to be displayed is used for projecting and displaying the image to be displayed.

In this embodiment, the image processing module may perform decomposition processing on image data of an image to be displayed, and send image data of a plurality of sub-images obtained by decomposition to the plurality of display control modules, respectively. Wherein the number of sub-images is consistent with the number of display control modules.

Then, each display control module can convert the received image data of the sub-images into control signals and send the control signals to the digital micro-mirror devices correspondingly connected with the display control modules, so that each digital micro-mirror device can control the lenses to overturn according to the control signals output by the corresponding display control modules and output display signals of the sub-images.

Finally, the lens can transmit the display signals of the sub-images output by the corresponding digital micromirror devices to the synthesizing prism. The synthesizing prism synthesizes the display signals of the plurality of sub-images transmitted through the plurality of lenses into a display signal of an image to be displayed. The display signal of the image to be displayed is used for projection display of the image to be displayed.

In addition to the first embodiment, the projection display device further includes: and the signal receiving module and the encoding and decoding module. Accordingly, the method further comprises: the signal receiving module receives video data of a video to be displayed, which is sent by a signal source; and the encoding and decoding module encodes and decodes the video data to obtain image data of the image to be displayed.

In one example, the content to be displayed by projection is video, and based on the basic principle of projection display, video data of the video to be displayed needs to be converted into image data of an image to be displayed of one frame.

Specifically, the signal receiving module may be used to receive video data of the video to be displayed sent by the signal source and send the video data to the codec module connected to the signal receiving module, where the codec module may encode and decode the video data to obtain image data of the image to be displayed, where the image data of the image to be displayed may be a differential signal, and send the image data of the image to be displayed to the image processing module connected to the differential signal, so that the image processing module performs decomposition processing on the image data of the image to be displayed.

The projection display method provided by the embodiment is applied to projection display equipment, the image processing module can decompose the image data of the image to be displayed and respectively send the image data of a plurality of sub-images obtained by decomposition to the display control modules, the display control modules convert the received image data of the sub-images into control signals so that the digital micro-mirror device outputs the display signals of the sub-images based on the control signals, and then the synthesis prism synthesizes the display signals of the sub-images to be displayed for projection display of the image to be displayed. That is, in the embodiment of the present application, a plurality of digital micromirror devices are used to output display signals of a plurality of sub-images, and then a synthesizing prism is used to synthesize the display signals of the images to be displayed for projection display.

Example six

On the basis of the fifth embodiment, in order to further describe the projection display method of the present application, the display control module includes a framing module and a processing module, and step 102 includes: the framing module carries out framing processing on the received image data of each frame of sub-image to obtain multi-frame image data corresponding to the sub-image; the processing module converts multi-frame image data corresponding to each sub-image into corresponding control signals according to each sub-image.

Step 103, including: the digital micro-mirror device outputs display signals of the sub-images according to a plurality of control signals corresponding to each frame of sub-images and a preset output time sequence, wherein the display signals of the sub-images comprise a plurality of sub-display signals corresponding to the sub-images.

Step 105, comprising: the synthesizing prism is used for adjusting the optical transmission paths of the display signals of the plurality of sub-images transmitted by the plurality of lenses so as to synthesize the display signals of the image to be displayed, wherein the display signals of the image to be displayed comprise a plurality of sub-display signals corresponding to the image to be displayed, and each sub-display signal corresponding to the image to be displayed is synthesized by the sub-display signals corresponding to the sub-images output by the plurality of digital micro-mirror devices at the same time.

In this embodiment, in order to further improve the resolution of the projection display, the sub-images of each frame may be further subjected to framing processing. Accordingly, the display control module may include a framing module and a processing module.

Specifically, the framing module is connected with the image processing module, and can perform framing processing on the received image data of each frame of sub-image to obtain multi-frame image data corresponding to the sub-image.

The display signals of the sub-images comprise a plurality of sub-display signals corresponding to the sub-images.

By the mode, the resolution of projection display is further improved.

On the basis of the above embodiment, since the positions of the pixels of each frame of image are different in the multi-frame image corresponding to the sub-image after the framing process is performed, in order to ensure that all the pixels of each image to be displayed can be projected and displayed, a galvanometer module is required to be set corresponding to the synthesizing prism.

Accordingly, the galvanometer module may perform a corresponding angular rotation based on an output timing of a display signal of each frame of an image to be displayed, so that a plurality of sub-display signals corresponding to the sub-image are transmitted through the galvanometer module, and the plurality of sub-display signals corresponding to the sub-image are subjected to dithering.

In the projection display method provided by the embodiment, the framing module is used for framing the sub-images, so that the resolution of projection display is further improved, and in addition, the vibrating mirror module is used for dithering the sub-display signals of the sub-images, so that all pixel points of each image to be displayed can be projected and displayed, and the integrity and the normal display of the images are ensured.

Example seven

On the basis of the first embodiment, in one possible implementation manner, the number of the display control modules or the digital micromirror devices is two. Accordingly, in step 101, the image processing module performs decomposition processing on image data of an image to be displayed, including: the image processing module decomposes the image data of the image to be displayed according to a first strategy; wherein the first policy includes a horizontal average division or a vertical average division.

In one embodiment, in step 101, the image processing module performs a decomposition process on image data of an image to be displayed, including: the image processing module can determine the dividing line of the image to be displayed, and decompose the image data of the image to be displayed according to the dividing line to obtain the image data of a plurality of sub-images.

Correspondingly, the synthesizing prism can splice the display signals of the sub-images output by the image display modules based on the dividing lines to obtain the display signals of the images to be displayed, and the display signals of the adjacent sub-images at the corresponding dividing lines are overlapped.

In the projection display method provided by the embodiment, the processing speed of projection display is ensured by carrying out horizontal average division or vertical average division on the image data of the image to be displayed, and in addition, when the image data of the image to be displayed is decomposed, the image data of the adjacent sub-images all comprise the image data corresponding to the dividing line, so that the defect of the image data to be displayed caused when the image to be displayed is synthesized is avoided, and the effect of projection display is effectively ensured.

In the several embodiments provided in this application, it should be understood that the above-described apparatus embodiments are merely illustrative, and for example, the division of modules is merely a logical function division, and there may be other division manners in which a practical implementation may be, for example, multiple modules or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in hardware plus software functional modules.

Moreover, although operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present application. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

A projection display device, comprising: the system comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthetic prism; the display control modules are connected with the digital micromirror devices in a one-to-one correspondence manner; the lenses are positioned between the synthetic prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthetic prism is arranged corresponding to the plurality of lenses;

the image processing module is used for decomposing the image data of the image to be displayed and respectively transmitting the image data of a plurality of sub-images obtained by decomposition to the display control modules; the number of the sub-images is consistent with that of the display control modules;

the display control modules are connected with the image processing module and are used for converting received image data of the sub-images into control signals; the digital micro-mirror device is connected with the corresponding display control module and is used for outputting a display signal of the sub-image according to the control signal output by the corresponding display control module;

The lens is used for transmitting the display signals of the sub-images output by the corresponding digital micro-mirror devices and transmitting the display signals to the synthesis prism; the synthesis prism is used for synthesizing the display signals of the plurality of sub-images transmitted by the plurality of lenses into the display signals of the image to be displayed, and the display signals of the image to be displayed are used for projecting and displaying the image to be displayed.
The apparatus of claim 1, wherein the display control module comprises a framing module and a processing module; wherein,

the framing module is connected with the image processing module and is used for framing the received image data of each sub-image frame to obtain multi-frame image data corresponding to the sub-image frame;

the processing module is connected with the framing module and is used for converting multi-frame image data corresponding to each sub-image into corresponding control signals;

the digital micro-mirror device is connected with the processing module and is particularly used for outputting display signals of the sub-images according to a preset output time sequence according to a plurality of control signals corresponding to each frame of sub-images, wherein the display signals of the sub-images comprise a plurality of sub-display signals corresponding to the sub-images;

The synthesizing prism is specifically configured to adjust optical transmission paths of display signals of the multiple sub-images transmitted by the multiple lenses, so as to synthesize the display signals of the image to be displayed, where the display signals of the image to be displayed include multiple sub-display signals corresponding to the image to be displayed, and each sub-display signal corresponding to the image to be displayed is obtained by synthesizing sub-display signals corresponding to the sub-images output by the multiple digital micromirror devices at the same time.
The apparatus of claim 2, wherein the projection display apparatus further comprises: the galvanometer module is arranged corresponding to the synthetic prism;

the galvanometer module is used for executing corresponding angle rotation based on the output time sequence of the display signals of each frame of the image to be displayed, so that a plurality of sub-display signals corresponding to the sub-images are transmitted and output through the galvanometer module, and the plurality of sub-display signals corresponding to the sub-images are subjected to dithering processing.
The apparatus of claim 1, wherein the projection display apparatus further comprises: a signal receiving module and a coding and decoding module;

the signal receiving module is used for receiving video data of the video to be displayed, which is sent by the signal source;

And the encoding and decoding module is used for encoding and decoding the video data to obtain image data of the image to be displayed.
The apparatus of claim 1, wherein the number of the display control modules or the digital micromirror devices is two; the image processing module performs decomposition processing on image data of an image to be displayed, and the image processing module comprises:

the image processing module is specifically used for decomposing image data of an image to be displayed according to a first strategy; wherein the first policy includes a horizontal average division or a vertical average division.
The apparatus according to claim 1, wherein the image processing module performs a decomposition process on image data of an image to be displayed, comprising:

the image processing module is specifically used for determining a boundary line of the image to be displayed;

the image processing module is further specifically configured to decompose image data of an image to be displayed according to the dividing line to obtain image data of a plurality of sub-images; wherein the image data of adjacent sub-images each include image data at a corresponding dividing line;

the synthesis prism is specifically configured to splice display signals of the sub-images output by the plurality of image display modules based on the dividing line to obtain display signals of the image to be displayed, where display signals of adjacent sub-images at corresponding dividing lines overlap.
A projection display system comprising the projection display device of any of claims 1-6, and further comprising a screen.
The system of claim 7, wherein the screen is a liftable screen.
A projection display method applied to a projection display device, the projection display device comprising: the system comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthetic prism; the display control modules are connected with the digital micromirror devices in a one-to-one correspondence manner; the lenses are positioned between the synthetic prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthetic prism is arranged corresponding to the plurality of lenses;

the method comprises the following steps:

the image processing module is used for decomposing the image data of the image to be displayed and respectively transmitting the image data of a plurality of sub-images obtained by decomposition to the display control modules; each display control module converts the received image data of the sub-images into control signals; each digital micromirror device outputs a display signal of the sub-image according to the control signal output by the display control module connected with the digital micromirror device; the lens transmits the display signals of the sub-images output by the corresponding digital micro-mirror devices to the synthesizing prism; and the synthesis prism synthesizes the display signals of the plurality of sub-images transmitted by the plurality of lenses into the display signal of the image to be displayed, and the display signal of the image to be displayed is used for projecting and displaying the image to be displayed.
The method of claim 9, wherein the display control module comprises a framing module and a processing module; each display control module converts the received image data of the sub-image into a control signal, including:

the framing module carries out framing processing on the received image data of each frame of sub-image to obtain multi-frame image data corresponding to the sub-image; the processing module converts multi-frame image data corresponding to each sub-image into corresponding control signals according to each sub-image;

each digital micro-mirror device outputs a display signal of a sub-image according to a control signal output by a display control module of the image display module, and the method comprises the following steps:

the digital micro-mirror device outputs display signals of the sub-images according to a plurality of control signals corresponding to each frame of sub-images and a preset output time sequence, wherein the display signals of the sub-images comprise a plurality of sub-display signals corresponding to the sub-images;

the synthesizing prism synthesizes the display signals of the plurality of sub-images transmitted by the plurality of lenses, and the display signals of the image to be displayed comprise:

the synthesizing prism is used for adjusting the optical transmission paths of the display signals of the plurality of sub-images transmitted by the plurality of lenses so as to synthesize the display signals of the image to be displayed, wherein the display signals of the image to be displayed comprise a plurality of sub-display signals corresponding to the image to be displayed, and each sub-display signal corresponding to the image to be displayed is synthesized by the sub-display signals corresponding to the sub-images output by the plurality of digital micro-mirror devices at the same time.
The method of claim 10, wherein the projection display device further comprises: the galvanometer module is arranged corresponding to the synthetic prism;

the method further comprises the steps of:

the vibrating mirror module executes corresponding angle rotation based on the output time sequence of the display signals of each frame of the image to be displayed, so that a plurality of sub-display signals corresponding to the sub-images are transmitted and output through the vibrating mirror module, wherein the sub-display signals are subjected to dithering processing and correspond to the sub-images.
The method of claim 9, wherein the projection display device further comprises: a signal receiving module and a coding and decoding module;

the method further comprises the steps of:

the signal receiving module receives video data of a video to be displayed, which is sent by a signal source; and the encoding and decoding module encodes and decodes the video data to obtain image data of the image to be displayed.
The method of claim 9, wherein the number of the display control modules or the digital micromirror devices is two; the image processing module performs decomposition processing on image data of an image to be displayed, and the image processing module comprises:

the image processing module decomposes the image data of the image to be displayed according to a first strategy; wherein the first policy includes a horizontal average division or a vertical average division.
The method of claim 9, wherein the image processing module performs decomposition processing on image data of an image to be displayed, comprising:

the image processing module determines a boundary of the image to be displayed, and decomposes the image data of the image to be displayed according to the boundary to obtain image data of a plurality of sub-images; wherein the image data of adjacent sub-images each include image data at a corresponding dividing line; and the synthesis prism is used for splicing the display signals of the sub-images output by the image display modules based on the dividing lines to obtain the display signals of the images to be displayed, and the display signals of the adjacent sub-images at the corresponding dividing lines are overlapped.