CN113489960A

CN113489960A - Projection display device, method and system

Info

Publication number: CN113489960A
Application number: CN202110738300.XA
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: 2021-06-30
Publication date: 2021-10-08
Also published as: CN117597917A; WO2023273435A1

Abstract

The application provides a projection display device, a method and a system, wherein the device comprises: the display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis prism. 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 convert the received data into control signals, the digital micromirror device outputs the display signals of the sub-images based on the control signals, and the synthesizing prism synthesizes the display signals of the image to be displayed with the display signals of the plurality of sub-images. The device of this application adopts a plurality of digital micromirror devices, the display signal of a plurality of subimages of output, adopts synthetic prism again to treat the display signal of display image with its synthesis for the projection shows, adopts a plurality of digital micromirror devices can promote the resolution ratio of projection display, thereby realizes high resolution display, and then effectively improves projection display picture quality.

Description

Projection display device, method and system

Technical Field

The present application 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 applied more and more widely in daily life. Laser projection refers to the process of amplifying and displaying an image transmitted by a laser light source on a projection screen by using an image display module in a projection display device.

However, as the demand for the size of the projection screen is increasing, the image quality of the projection screen projected by the existing projection display device cannot meet the display demand, and therefore, how to improve the projection display image quality becomes a problem to be solved urgently.

Disclosure of Invention

The application provides a projection display device, a method and a system, which are used for improving the projection display image quality.

In a first aspect, an embodiment of the present application provides a projection display device, including: the display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis 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 synthesis prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthesis 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 sending the image data of a plurality of sub-images obtained by decomposition to the plurality of 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 used for converting the received image data of the sub-images into control signals; the digital micromirror device is connected with the corresponding display control module and is used for outputting the display signals of the sub-images according to the control signals 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 micromirror devices and then transmitting the display signals to the synthesis prism; the synthesizing prism is used for synthesizing the display signals of the to-be-displayed images with the display signals of the sub-images transmitted by the lenses, and the display signals of the to-be-displayed images are used for projecting and displaying the to-be-displayed images.

Further, the apparatus as described above, the display control module includes a framing module and a processing module; wherein the content of the first and second substances,

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

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

the digital micromirror device is connected with the processing module and is specifically used for outputting display signals of sub-images according to a plurality of control signals corresponding to each frame of sub-image 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 is specifically configured to adjust an optical transmission path of 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, where the display signal of the image to be displayed includes 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 obtained by synthesizing the sub-display signals corresponding to the sub-images output by the plurality of digital micromirror devices at the same time.

Further, the apparatus as described above, the projection display apparatus further comprising: the device comprises a signal receiving module and a coding and decoding module;

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

and the coding and decoding module is used for coding and decoding the video data to obtain the image data of the image to be displayed.

Further, in the above-described device, the number of the display control modules or the digital micromirror devices is two; the image processing module carries out decomposition processing on image data of an image to be displayed, and comprises:

the image processing module is specifically used for decomposing the image data of the image to be displayed according to a first strategy; wherein the first strategy comprises a horizontal average division or a vertical average division.

Further, as described above, the image processing module performs decomposition processing on the image data of the image to be displayed, and includes:

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

the image processing module is further specifically configured to perform decomposition processing on 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 comprise image data at a corresponding boundary;

the synthesizing prism is specifically configured to splice the display signals of the sub-images output by the plurality of image display modules based on the boundary to obtain the display signals of the image to be displayed, and the display signals of adjacent sub-images at the corresponding boundary are overlapped.

In a second aspect, an embodiment of the present application provides a projection display system, which includes the projection display device according to the first aspect and a screen.

Further, in the system as described above, the screen is a liftable 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 display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis 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 synthesis prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthesis prism is arranged corresponding to the plurality of lenses;

the method comprises the following steps:

the image processing module carries out decomposition processing on image data of an image to be displayed and respectively sends image data of a plurality of sub-images obtained by decomposition to the plurality of display control modules; each display control module converts the received image data of the sub-image into a control signal; each digital micromirror device outputs a display signal of a sub-image according to a control signal output by a display control module connected with the digital micromirror device; the lens transmits the display signal of the sub-image output by the corresponding digital micromirror device and then transmits the display signal to the synthesis prism; and the synthesis prism synthesizes 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.

Further, the method as described above, the display control module includes a framing module and a processing module; each display control module converts the received image data of the sub-image into a control signal, and the method comprises the following steps:

the framing module performs 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 frame of sub-image into corresponding control signals;

each digital micro-mirror device outputs the display signal of the sub-image according to the control signal output by the 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-image 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 images to be displayed according to the display signals of the plurality of sub-images transmitted by the plurality of lenses, and comprises the following steps:

the synthesizing prism adjusts the optical transmission path of the display signals of the plurality of sub-images transmitted by the plurality of lenses to synthesize the display signals of the image to be displayed, 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 obtained by synthesizing the sub-display signals corresponding to the sub-images output by the plurality of digital micromirror devices at the same moment.

Further, the method as described above, the projection display device further comprising: the galvanometer module is arranged corresponding to the synthesis prism;

the method further comprises the following steps:

the mirror-vibrating module executes corresponding angle rotation based on the output time sequence of the display signal of each frame of image to be displayed, so that the plurality of sub-display signals corresponding to the sub-images are transmitted and output through the mirror-vibrating module, and the plurality of sub-display signals corresponding to the sub-images are subjected to dithering processing.

Further, the method as described above, the projection display device further comprising: the device comprises a signal receiving module and a coding and decoding module;

the method further comprises the following steps:

the signal receiving module receives video data of a video to be displayed, which is sent by a signal source; and the coding and decoding module is used for coding and decoding the video data to obtain the image data of the image to be displayed.

Further, in the method described above, the number of the display control modules or the digital micromirror devices is two; the image processing module carries out decomposition processing on image data of an image to be displayed, and comprises:

the image processing module carries out decomposition processing on image data of an image to be displayed according to a first strategy; wherein the first strategy comprises a horizontal average division or a vertical average division.

Further, according to the method described above, the image processing module performs decomposition processing on the image data of the image to be displayed, and includes:

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 comprise image data at a corresponding boundary; and the synthesizing prism splices the display signals of the sub-images output by the image display modules based on the boundary to obtain the display signals of the images to be displayed, and the display signals of the adjacent sub-images at the corresponding boundary are overlapped.

The application provides a projection display device, a method and a system, which comprise an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis prism. The image processing module can decompose image data of an image to be displayed, and respectively send the decomposed image data of a plurality of sub-images 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 micromirror device outputs display signals of the sub-images based on the control signals, and then the synthesizing prism synthesizes the display signals of the plurality of sub-images into display signals of the image to be displayed for projection display of the image to be displayed. That is to say, this application adopts a plurality of digital micro mirror devices, the display signal of a plurality of subimages of output, adopts synthetic prism to synthesize the display signal of treating the display image with it again for projection display, because the resolution ratio of projection display is decided by digital micro mirror device, consequently adopts a plurality of digital micro mirror devices can promote the resolution ratio of projection display to realize high resolution display, and then effectively improve projection display image quality.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present 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 apparatus according to an exemplary embodiment;

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

fig. 3 is a schematic diagram schematically illustrating a hardware configuration of the 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 disclosure;

fig. 5 is a schematic optical path diagram 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 another projection display device provided in an embodiment of the present application;

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

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

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

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

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

fig. 9a 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. 9b 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. 9c 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. 9d 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 to-be-displayed image provided by an embodiment of the present application;

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

fig. 12a is a schematic diagram illustrating a decomposition processing result of image data according to an embodiment of the present application;

fig. 12b is a schematic diagram illustrating a decomposition processing result of image data according to an embodiment of the present application;

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

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

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

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

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

With the development of display technology, laser projection is widely applied in the fields of commerce, teaching and the like. Laser projection uses a projection display device, such as a laser television, to implement a projection display on a screen. The most important working module in the projection display device is an image display module, which comprises a digital micromirror device, wherein 80 to 100 thousands of lenses are tightly arranged on the digital micromirror device, each lens can be independently turned to the positive direction and the negative direction, and a light source is reflected to a screen through the lenses to directly form an image, wherein one lens represents one pixel, namely, the light reflected by one lens is a pixel point of the finally formed image. Under the condition that the screen size is fixed, the more the pixel points of the image are, the higher the resolution (the number of the pixel points in the unit area) of the image is, and the better the image quality of the projection display is.

However, as the demand of people for the size of the projection screen is continuously increased, the existing projection display equipment is adopted for projection, the number of pixels of an image is not changed, but the number of pixels in a unit area, namely the resolution ratio, is lowered, so that the image quality of projection display cannot meet the display demand.

The application provides a projection display device, a method and a system, which aim to solve the technical problems in the prior art.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated 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 (e.g., a display device as disclosed herein) that is capable of wirelessly controlling the electronic device, typically over a relatively short distance. The component may typically be connected to the electronic device 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 the common remote control device with the user interface in the touch screen.

Fig. 1 is a schematic diagram illustrating an operation scenario between a laser television and a control device according to an exemplary embodiment. As shown in fig. 1, a user can operate the laser television 200 through the control device 100.

The control device 100 may be a remote controller 100A, which can communicate with the laser television 200 through an infrared protocol communication, a bluetooth protocol communication, a ZigBee (ZigBee) protocol communication, or other short-distance communication, and is used to control the laser television 200 through a wireless or other wired manner. The user can input a user instruction through a key on the remote control 100A, voice input, control panel input, or the like to control the laser television 200. Such as: the user can input a corresponding control command through a screen up/down key, a volume up/down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller 100A, thereby implementing a function of controlling the laser television 200.

The control device 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, and the like, which may communicate with the laser television 200 through a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), or other networks, and implement control of the laser television 200 through an application program corresponding to the laser television 200. For example, 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 have a software application installed thereon, so that the connection communication between the two can be realized through a network communication protocol, and the purpose of one-to-one control operation and data communication can be further realized. Such as: a control instruction protocol can be established between the mobile terminal 100B and the laser television 200, 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 implement a synchronous display function.

As shown in fig. 1, the laser television 200 may also communicate data with the server 300 through a variety of communication methods. In various embodiments of the present application, laser television 200 may be enabled to be in wired or wireless communication with server 300 via a local area network, wireless local area network, or other network. Server 300 may provide various content and interactions to laser television 200.

Illustratively, laser television 200 receives software Program updates, or accesses a remotely stored digital media library by sending and receiving information, and Electronic Program Guide (EPG) interactions. The servers 300 may be a group or groups, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service 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 in an optical projection imaging manner, so that the screen 201 displays the content to be displayed. The particular laser television type, size, resolution, etc. are not limiting, and those skilled in the art will appreciate that the laser television 200 may be modified in performance and configuration as desired.

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

In other examples, more or less functionality may be added. The functions of the laser television are not particularly limited in the present application.

Fig. 2 is a block diagram schematically showing the configuration of the control apparatus 100 according to the exemplary embodiment. 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, convert the operation instruction into an instruction recognizable and responsive by the laser television 200, and play a role in mediating interaction between the user and the laser television 200. Such as: the user responds to the channel up/down operation by operating the channel up/down key on the control device 100. The following steps are repeated: the user responds to the control of the screen ascending or descending by operating the screen ascending or descending key on the control device 100 by the laser television 200. In the present application, the term "up" or "down" refers to the mounting position of the screen, and it is understood that the direction in which the screen is mounted differs depending on the mounting position of the screen. For example, for a screen mounted on a ceiling, the "up" and "down" directions thereof refer to the change of the screen in the height direction, and for a screen mounted on a vertical side wall, the directions of the "up" and "down" herein are the changes in the horizontal direction.

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

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

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

The communicator 130 communicates 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, a key 144, a camera 145, and the like. Such as: the user can realize a user instruction input function through actions such as voice, touch, gesture, pressing and the like, and the input interface converts the received analog signal into a digital signal and converts the digital signal into a corresponding instruction signal, and sends the instruction signal 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, it may be an infrared interface or 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 sent to the laser television 200 through the infrared sending module. The following steps are repeated: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then modulated according to the rf control signal modulation protocol, and then transmitted to the laser television 200 through the rf transmitting terminal.

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

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

And a power supply 180 for providing operation power support for each electrical component of the control device 100 under the control of the controller 110. The power supply 180 may be powered by a battery and associated control circuitry.

Fig. 3 schematically shows a hardware configuration of the laser television 200 according to an exemplary embodiment. For convenience of illustration, the laser television 200 in fig. 3 is illustrated by an example in which the laser projection device and the liftable screen are separately disposed.

As shown in fig. 3, 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, and specifically, the laser projection device can analyze a video signal to be played into an image signal and project the image signal onto a liftable screen to form an image. The liftable screen 2 is used to present a picture to a user.

In this application, except the mode that laser projection equipment and liftable screen separation set up, in order to reduce occupation space, in another kind of setting mode, make laser projection equipment 1 and liftable screen 2 as an organic whole. As an example, the laser television 200 integrates a laser projection device and a liftable screen in a television cabinet.

Example one

As the size of a projection screen increases, it is necessary to increase the resolution of an image in order to improve the projection display image quality, 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 disclosure, 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 synthesis 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 arranged in one-to-one correspondence with the plurality of digital micromirror devices 13. The combining prism 15 is disposed corresponding to the plurality of lenses 14.

In this embodiment, since the plurality of digital micromirror devices 13 and the plurality of display control modules 12 connected to the same in a one-to-one correspondence are provided, accordingly, it is necessary to decompose the image data of the image to be displayed and send the image data 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 send the 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 (FPGA). Because the hardware structure of the FPGA is special, the internal structure can be adjusted by using a logic structure file edited in advance, the connection and the position of different logic units can be adjusted by using a constrained file, the data line path is properly processed, and the FPGA 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, the mirror of the digital micromirror device 13 needs to be controlled to be turned over, and thus the image data of the sub-image needs to be converted into a control signal.

Specifically, the plurality of display control modules 12 are connected to 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 micromirror device 13 correspondingly connected to the display control modules, so that the digital micromirror device 13 can control the lenses to turn over according to the control signals output by the corresponding display control modules 12, and output the display signals of the sub-images.

The display signal may be an optical signal for projection display. One display signal includes a plurality of pixels.

In one example, the display control module 12 may be an Application Specific Integrated Circuit (ASIC). The volume is small, the reliability is high, and the rapid conversion of data can be realized.

Finally, the lens 14 may transmit the display signal of the sub-image output by the corresponding digital micromirror device 13, and then transmit the transmitted display signal to the combining prism 15. The synthesizing prism 15 synthesizes display signals of the images to be displayed with the display signals of the plurality of sub-images transmitted through the plurality of lenses 14. 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 signal of the sub-image that can be output by each digital micromirror device includes 2048 × 2192 pixels, that is, the number of the pixel points of each sub-image is 2048 × 2192, and if the number of the digital micromirror devices is n, the display signal of the finally synthesized image to be displayed includes n × 2048 × 2192 pixels, that is, the number of the pixel points of the image to be displayed is n × 2048 × 2192 pixels, and accordingly, the number of the pixel points in a unit area, that is, the resolution is increased 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 a synthesizing prism 15 and a plurality of digital micromirror devices 13, and are arranged in a one-to-one correspondence with the plurality of digital micromirror devices 13. The combining prism 15 is disposed 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, and then transmit the display signal to the combining prism 15. Then, the synthesizing 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, as shown in fig. 5, when there are two display signals of the sub-images, the synthesizing prism 15 may keep the optical transmission path of one of the display signals unchanged, and adjust the optical transmission path of the other display signal through one reflective interface to be consistent with the optical transmission path of the one display signal which is kept unchanged, so that the display signals of the two sub-images may be synthesized into the display signal of the image to be displayed.

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

Fig. 6 is a schematic structural diagram of another projection display device provided in the embodiment of the present application, and as shown in fig. 6, on the basis of the first embodiment, the projection display device provided in the present embodiment further includes a signal receiving module 16 and a coding and decoding module 17.

In a possible application scenario, the content to be projected and displayed is a 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 16 may be used to receive video data of a video to be displayed sent by the signal source and send the video data to the codec module 17 connected to the signal receiving module, 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 to the codec module 11, 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). The SOC is an integrated controller, the size is small, the processing speed is high, and therefore encoding and decoding processing of video data can be achieved rapidly.

The projection display device provided by the embodiment comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis prism. The image processing module can decompose image data of an image to be displayed, and respectively send the decomposed image data of a plurality of sub-images 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 micromirror device outputs display signals of the sub-images based on the control signals, and then the synthesizing prism synthesizes the display signals of the plurality of sub-images into display signals of the image to be displayed for projection display of the image to be displayed. That is to say, the embodiment of the application adopts a plurality of digital micromirror devices to output the display signals of a plurality of sub-images, and then adopts the synthesis prism to synthesize the display signals of the image to be displayed for projection display.

Example two

On the basis of the first embodiment, in an optional implementation manner, in order to further improve the resolution of the projection display, the sub-images of each frame may be further subjected to frame division 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 the framing processing provided in the embodiment of the present application, as shown in fig. 7, the left side is a sub-image before the framing processing, each cell in the sub-image represents a pixel point, and during the framing processing, each pixel point is divided into a plurality of sub-pixel points, for example, A, B, C, D, so that a multi-frame image corresponding to the sub-image shown in the right side view can be obtained. The multi-frame image comprises a sub-image formed by all pixels A, a sub-image formed by all pixels B, a sub-image formed by all pixels C and a sub-image formed by all pixels D. That is, the resolution can be increased by 4 times by the framing process as shown in the figure.

Correspondingly, in order to output the display signals of the sub-images, the processing module is connected with the framing module, can convert the multi-frame image data corresponding to the sub-images into corresponding control signals for each frame of sub-image, and sends the control signals to the digital micro-mirror device connected with the processing module, and the digital micro-mirror device can output the display signals of the sub-images according to the control signals and a preset output time sequence.

The display signal of the sub-image comprises a plurality of sub-display signals corresponding to the sub-image. That is, the sub-display signal corresponding to the sub-image formed by all the a pixel points, the sub-display signal corresponding to the sub-image formed by all the B pixel points, the sub-display signal corresponding to the sub-image formed by all the C pixel points, and the sub-display signal corresponding to the sub-image formed by all the D pixel points.

For example, fig. 8a, 8B, 8C, and 8D are image schematics of sub-display signals corresponding to sub-images provided in this embodiment of the present application, and sequentially output sub-display signals corresponding to sub-images formed by all the a pixel points, sub-display signals corresponding to sub-images formed by all the B pixel points, sub-display signals corresponding to sub-images formed by all the C pixel points, and sub-display signals corresponding to sub-images formed by all the D pixel points according to a predetermined output timing, so that four image schematics as shown in fig. 8a, 8B, 8C, and 8D can be obtained.

Next, the synthesizing prism may adjust an optical transmission path of the display signals of the plurality of sub images transmitted through the plurality of lenses, and synthesize the display signals of the image to be displayed. The display signal of the image to be displayed comprises 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 obtained by synthesizing the sub-display signals corresponding to the sub-images output by the digital micro-mirror devices at the same time.

Fig. 9a, 9B, 9C, and 9D are image schematic diagrams of sub-display signals of an image to be displayed according to an embodiment of the present application, and as shown in fig. 9a, 9B, 9C, and 9D, if there are two digital micromirror devices, 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 output by the two digital micromirror devices and composed of all pixels a or B or C or D are synthesized, and accordingly, the image schematic diagrams shown in fig. 9a, 9B, 9C, and 9D can be obtained.

It should be noted that fig. 10 is a schematic diagram of a to-be-displayed image in visual presentation according to an embodiment of the present application, and although the sub-display signals used for synthesizing the display signals of the to-be-displayed image are output according to a predetermined output timing, and the obtained to-be-displayed image is also displayed according to the predetermined timing, since the whole output process is continuous and fast, and since the human eye has persistence of vision, the to-be-displayed image in final visual presentation is a to-be-displayed image including A, B, C, D all pixels in superimposed display, as shown in fig. 10.

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

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

Therefore, the relative positions of the sub-images respectively composed of all the A, B, C, D pixels are different. For example, the sub-image composed of all the B pixels is located on the right side of the sub-image composed of all the a pixels, and the sub-image composed of all the C pixels is located below the sub-image composed of all the B pixels. Accordingly, the relative positions of the images to be displayed obtained by the synthesis may be different. Therefore, in order to ensure that all the pixels of each image to be displayed can be projected and displayed, a galvanometer module needs to be arranged corresponding to the synthesis prism.

The mirror-vibrating module may perform corresponding angle rotation based on an output timing sequence of a display signal of each frame of an image to be displayed, so that the plurality of sub-display signals corresponding to the sub-images are transmitted and output through the mirror-vibrating module, and the plurality of sub-display signals corresponding to the sub-images are subjected to dithering processing.

In one example, the galvanometer module may be a 4-way galvanometer, and the 4-way galvanometer may rotate to cause a change in relative position of left, right, up and down of each frame of the image to be displayed, that is, dithering.

Fig. 11 is a schematic diagram of dithering of a mirror module according to an embodiment of the present application, and as shown in fig. 11, if an output timing sequence of a display signal of each frame of an image to be displayed is that, a sub-display signal of the image to be displayed, which is composed of all a pixel points, a sub-display signal of the image to be displayed, which is composed of all B pixel points, and a sub-display signal of the image to be displayed, which is composed of all C pixel points, are output sequentially, and the sub-display signal of the image to be displayed, which is composed of all the D pixel points, the galvanometer module 18 may, according to the output timing, after the sub-display signals corresponding to the sub-images formed by all the A pixel points are output, corresponding angle rotation is executed, so that the sub-display signals corresponding to the sub-images formed by all the B pixel points are subjected to dithering and transmission output, and the positions of the sub-display signals are changed to the right relative to the sub-display signals corresponding to the sub-images formed by all the A pixel points.

Accordingly, after outputting the sub-display signals corresponding to the sub-images formed by all the B pixel points, the mirror-vibrating module 18 performs corresponding angle rotation, so that the sub-display signals corresponding to the sub-images formed by all the C pixel points are subjected to dithering, transmitted and output, and the sub-display signals whose positions are changed downward with respect to the sub-display signals corresponding to the sub-images formed by all the B pixel points. Correspondingly, corresponding dithering processing is also carried out on the sub-display signals corresponding to the sub-images formed by all the D pixel points. It should be noted that, for different sub-display signals, the output direction thereof may be determined based on the relative position between the sub-pixels, for example, the B sub-pixel is located relatively at the right side of the a sub-pixel in the above example, so that the sub-display signal corresponding to the B sub-pixel is shifted to the right during the dithering process.

The projection display device provided by the embodiment adopts the framing module to perform framing processing on the sub-images, so that the resolution of projection display is further improved, and in addition, the vibrating mirror module is adopted to perform dithering processing on the sub-display signals of the sub-images, so that all pixel points of each to-be-displayed image can be guaranteed to be displayed in a projection manner, and the completeness of the image and the normal display are guaranteed.

EXAMPLE III

On the basis of the first embodiment, in a possible implementation, the number of the display control modules or the digital micromirror devices is two. Correspondingly, the image processing module performs decomposition processing on the image data of the image to be displayed, and the decomposition processing comprises the following steps: the image processing module may perform decomposition processing on image data of an image to be displayed according to a first policy.

Fig. 12a and 12b are schematic diagrams illustrating the result of image data decomposition processing according to an embodiment of the present application, and as shown in fig. 12a and 12b, the first policy may include horizontal average division or vertical average division. Fig. 12a shows a horizontal average division into two parts, i.e., an upper part 10 and a lower part 20, respectively, and fig. 12b shows a vertical average division into two parts, i.e., a left part 10 and a right part 20, respectively.

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 the processing speed of projection display can be ensured.

In an optional implementation manner, the image processing module performs decomposition processing on image data of an image to be displayed, and includes: the image processing module may determine a boundary of the image to be displayed, and perform decomposition processing on the image data of the image to be displayed according to the boundary to obtain image data of a plurality of sub-images.

In order to avoid missing image data to be displayed when synthesizing an image to be displayed, the image data of adjacent sub-images each include image data at a corresponding boundary.

Accordingly, the synthesizing prism may splice the display signals of the sub-images output by the plurality of image display modules based on the boundary to obtain the display signal of the image to be displayed, and the display signals of the adjacent sub-images at the corresponding boundary 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 shaded portion is an overlapping portion of display signals.

The projection display device provided by the embodiment ensures the processing speed of projection display by performing 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 subjected to decomposition processing, the image data of adjacent sub-images all include the image data of corresponding boundary lines, so that the defect of the image data to be displayed caused when the image to be displayed is synthesized is avoided, and the projection display effect is effectively ensured.

Example four

Fig. 14 is a projection display system according to an embodiment of the present application, and as shown in fig. 14, the projection display system according to the 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 applications, when there are two display control modules 12 or two digital micromirror devices 13, the image processing module 11 is respectively connected to the two display control modules 12, and can perform decomposition processing on image data of an image to be displayed, where a specific decomposition processing method is described in the above embodiments and is not described herein again. Next, the image processing module 11 may send 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 micromirror 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 micromirror device 13, and then transmit the display signal to the synthesizing prism 15, so that the synthesizing prism 15 synthesizes the display signal of the image to be displayed with the display signals of the plurality of sub-images transmitted by the plurality of lenses. The display signal of the image to be displayed is output to the screen 19, and 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 the 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 display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis 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 synthesis prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthesis 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 image data of an image to be displayed, and sends the image data of a plurality of sub-images obtained through decomposition to the plurality of display control modules respectively.

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

And 103, outputting the display signals of the sub-images by each digital micro-mirror device according to the control signals output by the display control module connected with the digital micro-mirror device.

And 104, transmitting the display signals of the sub-images output by the corresponding digital micromirror devices by the lens, and transmitting the display signals to the synthesis prism.

And 105, synthesizing the display signals of the to-be-displayed image by the synthesis prism according to the display signals of the plurality of sub-images transmitted by the plurality of lenses, wherein the display signals of the to-be-displayed image are used for projecting and displaying the to-be-displayed image.

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

Next, each display control module may convert the received image data of the sub-image into a control signal, and send the control signal to the digital micromirror device connected to the display control module, so that each digital micromirror device may control the lens to turn over according to the control signal output by the corresponding display control module, and output the display signal of the sub-image.

Finally, the lens can transmit the display signal of the sub-image output by the corresponding digital micromirror device and then transmit the display signal to the synthesis prism. The synthesizing prism synthesizes the display signals of the plurality of sub-images after being transmitted by the plurality of lenses into the display signal of the image to be displayed. The display signal of the image to be displayed is used for projecting and displaying the image to be displayed.

On the basis of the first embodiment, the projection display device further includes: the device comprises a signal receiving module and a coding 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 coding and decoding module is used for coding and decoding the video data to obtain the image data of the image to be displayed.

In one example, the content to be projected and displayed is a 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 receive video data of a video to be displayed sent by the signal source, and send the video data to the encoding and decoding module connected to the signal receiving module, the encoding and decoding module may perform encoding and decoding processing on the video data to obtain image data of an image to be displayed, the image data of the image to be displayed may be a differential signal, and the image data of the image to be displayed is sent to the image processing module connected to the encoding and decoding module, 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, an image processing module can decompose image data of an image to be displayed, and respectively send the decomposed image data of a plurality of sub-images to a plurality of display control modules, the display control modules convert the received image data of the sub-images into control signals, so that a digital micromirror device outputs display signals of the sub-images based on the control signals, and then a synthesizing prism synthesizes the display signals of the plurality of sub-images into the display signals of the image to be displayed for projection display of the image to be displayed. That is to say, the embodiment of the application adopts a plurality of digital micromirror devices to output the display signals of a plurality of sub-images, and then adopts the synthesis prism to synthesize the display signals of the image to be displayed for projection display.

EXAMPLE six

On the basis of the fifth embodiment, in order to further explain 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 performs framing processing on the received image data of each frame of sub-image to obtain multi-frame image data corresponding to the sub-image; and the processing module converts the multi-frame image data corresponding to each sub-image into a corresponding control signal aiming at each frame of sub-image.

Step 103, comprising: 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-image and according to 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 adjusts the optical transmission path of the display signals of the plurality of sub-images transmitted by the plurality of lenses to synthesize the display signals of the image to be displayed, 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 obtained by synthesizing the sub-display signals corresponding to the sub-images output by the plurality of digital micromirror devices at the same moment.

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

Specifically, the framing module is connected to 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 signal of the sub-image comprises a plurality of sub-display signals corresponding to the sub-image.

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

On the basis of the above embodiment, after the framing processing is performed, the positions of the pixel points of each frame of image are different in the multi-frame images corresponding to the sub-images, so that in order to ensure that all the pixel points of each image to be displayed can be projected and displayed, a mirror-vibrating module needs to be arranged corresponding to the synthesis prism.

Accordingly, the mirror-vibrating module may perform corresponding angle rotation based on an output timing sequence 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-images are transmitted through the mirror-vibrating module and output a plurality of sub-display signals corresponding to the sub-images, which are subjected to dithering processing.

In the projection display method provided by the embodiment, the framing module is adopted to perform framing processing on the sub-images, so that the resolution of projection display is further improved, and in addition, the galvanometer module is adopted to perform dithering processing on the sub-display signals of the sub-images, so that all pixel points of each image to be displayed can be guaranteed to be projected and displayed, and the completeness of the image and the normal display are guaranteed.

EXAMPLE seven

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

In an optional implementation manner, in step 101, the image processing module performs decomposition processing on image data of an image to be displayed, including: the image processing module may determine a boundary of the image to be displayed, and perform decomposition processing on the image data of the image to be displayed according to the boundary to obtain image data of a plurality of sub-images.

Accordingly, the synthesizing prism may splice the display signals of the sub-images output by the plurality of image display modules based on the boundary to obtain the display signal of the image to be displayed, and the display signals of the adjacent sub-images at the corresponding boundary are overlapped.

In the projection display method provided by this embodiment, the processing speed of projection display is ensured by performing 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 subjected to decomposition processing, the image data of adjacent sub-images all include image data at corresponding boundaries, so that the missing 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, for example, the division of modules is only one logical function division, and in actual implementation, there may be other division manners, for example, a plurality of modules or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on 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 the present embodiment.

In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware form, and can also be realized in a form of hardware and a software functional module.

Further, while 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. Under 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 limitations on the scope of the 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 invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention 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 invention 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 will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A projection display device, comprising: the display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis 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 synthesis prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthesis prism is arranged corresponding to the plurality of lenses;

2. The apparatus of claim 1, wherein the display control module comprises a framing module and a processing module; wherein the content of the first and second substances,

3. The apparatus of claim 2, wherein the projection display apparatus further comprises: the galvanometer module is arranged corresponding to the synthesis prism;

the mirror vibration module is used for executing corresponding angle rotation based on the output time sequence of the display signal of each frame of image to be displayed so as to enable the sub-display signals corresponding to the sub-images to be transmitted and output through the mirror vibration module, and the sub-display signals corresponding to the sub-images are subjected to dithering processing.

4. The apparatus of claim 1, wherein the projection display apparatus further comprises: the device comprises a signal receiving module and a coding and decoding module;

5. The apparatus of claim 1, wherein the number of the display control modules or the digital micromirror devices is two; the image processing module carries out decomposition processing on image data of an image to be displayed, and comprises:

6. The apparatus of claim 1, wherein the image processing module performs decomposition processing on the image data of the image to be displayed, and comprises:

7. A projection display system comprising a projection display device according to any one of claims 1 to 6 and a screen.

8. The system of claim 7, wherein the screen is a liftable screen.

9. A projection display method is applied to a projection display device, and is characterized in that the projection display device comprises: the display device comprises an image processing module, a plurality of display control modules, a plurality of digital micromirror devices, a plurality of lenses and a synthesis 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 synthesis prism and the digital micromirror devices and are arranged in one-to-one correspondence with the digital micromirror devices; the synthesis prism is arranged corresponding to the plurality of lenses;

the method comprises the following steps:

10. 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, and the method comprises the following steps:

11. The method of claim 10, wherein the projection display device further comprises: the galvanometer module is arranged corresponding to the synthesis prism;

the method further comprises the following steps:

12. The method of claim 9, wherein the projection display device further comprises: the device comprises a signal receiving module and a coding and decoding module;

the method further comprises the following steps:

13. The method of claim 9, wherein the number of the display control modules or the digital micromirror devices is two; the image processing module carries out decomposition processing on image data of an image to be displayed, and comprises:

14. The method of claim 9, wherein the image processing module performs decomposition processing on the image data of the image to be displayed, and comprises: