WO2018001341A1

WO2018001341A1 - Multi-screen projection device and method

Info

Publication number: WO2018001341A1
Application number: PCT/CN2017/090956
Authority: WO
Inventors: 李晓平
Original assignee: 海信集团有限公司; 海信（美国）开发有限公司; 青岛海信国际营销股份有限公司
Priority date: 2016-06-29
Filing date: 2017-06-29
Publication date: 2018-01-04
Also published as: WO2018001342A1; WO2018001343A1

Abstract

Disclosed are a multi-screen projection device and method. The multi-screen projection device disclosed in the present invention comprises: a signal processing system, a lens assembly, and a digital micromirror device (DMD); said signal processing system is used for receiving an N-way image signal, N being an integer greater than or equal to 2, and converting said N-way image signal to a DMD drive signal corresponding to N regions on the DMD; a DMD driver circuit used for driving, according to the received DMD drive signal, the regions corresponding to the DMD to project. The projections of different regions on the DMD are imaged to different regions on a screen by means of the lens assembly. The present invention enables multi-screen projection.

Description

Multi-screen projection device and method

This application is required to be submitted to the China Patent Office on June 29, 2016, the application number is 201610497098.5, and the invention name is “a multi-screen projection equipment and method”. It was submitted to the Chinese Patent Office on June 29, 2016, and the application number is 201610498620.1. The invention titled "a multi-screen projection device and method" and the Chinese patent application filed on June 29, 2016, the Chinese Patent Office, the application number is 201610497096.6, and the invention name is "a multi-directional projection device and method" Priority is hereby incorporated by reference in its entirety.

Technical field

The present invention relates to the field of projection technologies, and in particular, to a multi-screen projection apparatus and method.

Background technique

Digital Light Procession (DLP) projection technology uses digital micromirror device (DMD) as the main key component to realize digital optical processing. The DMD is composed of thousands of micromirrors. A bistable spatial light modulator. The principle of the DLP projector is to homogenize the light source by an integrator, and divide the light into three colors of red R, green G, and blue B through a color wheel with color three primary colors. The output is then imaged by the lens on the DMD. By digitally processing the image signal, the angle and duration of the deflection are independently controlled by the electrical signal to each micromirror on the DMD by means of the electrical signal, thereby guiding the reflected light and converting the continuous light into a gray scale, with R The three colors, G and B, represent the color, and finally are projected onto the screen through the projection of the lens assembly. Of course, the specific implementation of the DLP projector is not limited to three primary colors, DLP projector can use more primary colors, such as R, G, B, Y four primary colors.

Among them, DMD is a bistable spatial light modulator composed of thousands of micromirrors (precision, miniature mirrors), which is processed by a standard semiconductor process in Complementary Metal Oxide Semiconductor (CMOS). On top, plus a spin that can modulate the reflective surface The rotating mechanism is formed. By loading data into a memory cell located below the micromirror, the data is electrostatically controlled in a binary manner to the deflection state of the micromirror, and each of the micromirrors independently controls the angle and duration of deflection thereof, thereby guiding the reflected light and the modulated ash. Order. Fig. 1 exemplarily shows the deflection of two micromirrors on a DMD and the case of reflecting light. It can be seen that the angle of deflection of the micromirror 101 and the micromirror 102 is different, and the micromirror 101 can reflect the light emitted by the light source 103 to the light absorbing unit 104 by the angle of its deflection, and the angle of the micromirror 102 through its deflection can be Light emitted from the light source 103 is reflected onto the lens 105.

The current projection technology is usually limited to the design mode of projecting to a single direction at the same time. Therefore, how to change the existing projection technology to a single projection design mode, a technical solution that can realize multi-screen projection is urgently needed by the industry. Research and solve problems.

Summary of the invention

Embodiments of the present invention provide a multi-screen projection apparatus and method for implementing multi-screen projection.

A multi-screen projection apparatus provided by an embodiment of the present invention includes: a signal processing system, a lens assembly, and a digital micromirror device DMD;

The signal processing system is configured to receive an N-channel image signal, where N is an integer greater than or equal to 2, and convert the N-channel image signal into a DMD driving signal corresponding to an N-block region on the DMD;

The DMD driving circuit is configured to drive a corresponding area on the DMD to perform projection according to the received DMD driving signal.

Optionally, the N block regions on the DMD are symmetrically arranged with respect to an optical axis of the lens assembly.

Optionally, the signal processing system simultaneously outputs, to the DMD driving circuit, a DMD driving signal corresponding to the N block area obtained by converting an image to be projected corresponding to the N block area on the DMD.

Optionally, the signal processing system outputs, according to the preset time-shadow projection configuration information, the image to be projected corresponding to the region to the DMD driving circuit during a projection time period configured on the region on the DMD. The obtained DMD driving signal corresponding to the area, otherwise, does not output the DMD driving signal corresponding to the area.

Optionally, the multi-screen projection device further includes:

a first control system, configured to output a control signal to the DMD driving circuit according to the preset time-sharing projection configuration information, where the control signal is used to control the DMD driving circuit to drive the DMD according to the DMD driving signal output by the signal processing system The projection is performed according to the preset time-sharing projection configuration information, and the DMD driving circuit is driven to drive the micromirrors of the region on the DMD that do not need to be projected according to the preset time-sharing projection configuration information to be turned off. status.

Optionally, the signal processing system sets the number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and the shape formed by the micromirrors in the address range to be the same, so that the DMD The size of the upper N areas is the same as each other; or

The number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and the shape formed by the micromirrors in the address range are set to be different so that the sizes of the N blocks on the DMD are not different from each other. the same.

Optionally, the signal processing system determines an address range of the micromirror on the DMD allocated for each image signal and/or a shape formed by the micromirror in the address range according to the size of the DMD and the preset number of partitions.

Optionally, the signal processing system determines an address range of the micromirror on the DMD allocated for each image signal and/or a shape formed by the micromirror in the address range according to the size of the DMD and the number of image signals.

Optionally, the signal processing system determines an address range of the micromirror on the DMD allocated to each image signal and/or a shape formed by the micromirror in the address range according to the resolution of the image to be projected.

Optionally, the multi-screen projection device further includes: a movable mechanical component; the DMD is disposed on the movable mechanical component, and the multi-screen projection device further includes:

a second control system, configured to control, according to the target imaging area of the N block area on the DMD, the movable mechanical component where the DMD is located to drive the DMD disposed on the movable mechanical component to move and/or twist, A projection of the N block regions on the DMD is imaged by the lens assembly onto the target imaging region of the screen.

A multi-screen projection method provided by an embodiment of the present invention is applied to a DMD and a lens group Projection device of the piece, the method comprises:

Receiving an N-channel image signal, N being an integer greater than or equal to 2, converting the N-channel image signal into a DMD driving signal corresponding to the N-block region on the DMD;

The corresponding area on the DMD is driven to be projected according to the received DMD driving signal.

Optionally, driving the corresponding area on the DMD to perform the projection according to the received DMD driving signal, including: converting the image to be projected corresponding to the N block area on the DMD to obtain a DMD driving signal corresponding to the N block area, Simultaneous output to the DMD driver circuit.

Optionally, driving the corresponding area on the DMD to perform projection according to the received DMD driving signal, including: according to preset time-shadow projection configuration information, in a projection time period configured on an area on the DMD And outputting the DMD driving signal of the corresponding area to the DMD driving circuit; otherwise, the DMD driving signal of the corresponding area is not output.

Optionally, driving the corresponding area on the DMD to perform projection according to the received DMD driving signal, including: outputting a control signal to the DMD driving circuit according to the preset time-sharing projection configuration information, where the control signal is used to control the DMD The driving circuit drives the area on the DMD that needs to be projected according to the preset time-shadow projection configuration information according to the received DMD driving signal, and controls the DMD driving circuit to drive the configuration information according to the preset time-sharing projection on the DMD. The micromirrors of the area where projection is not required are deflected to the off state.

Optionally, the multi-screen projection method further includes: setting the number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and the shape of the micromirror in the address range to The same, such that the sizes of the N blocks on the DMD are identical to each other; or

Optionally, the multi-screen projection method further includes: determining an address range of the micromirror on the DMD allocated for each image signal and/or a micromirror in the address range according to the size of the DMD and the preset number of partitions. The shape formed.

Optionally, the multi-screen projection method further includes: according to the size of the DMD and the image signal The number is determined as the address range of the micromirror on the DMD assigned to each image signal and/or the shape formed by the micromirrors in the address range.

Optionally, the multi-screen projection method further includes: determining, according to a resolution of the image to be projected, an address range of the micromirror on the DMD allocated for each image signal and/or a micromirror in the address range. shape. Optionally, the multi-screen projection method further includes:

Controlling, by the movable imaging component of the projection device, the movable mechanical component of the projection device to move and/or twist the DMD disposed on the movable mechanical component to cause N on the DMD according to a target imaging region of the N block region on the DMD A projection of the block area is imaged by the lens assembly onto the target imaging area of the screen.

It can be seen that, in the multi-screen projection device provided in the embodiment of the present invention, the DMD is divided into multiple regions that do not overlap each other, and the signal processing system performs signal processing on the DMD in units of regions, by corresponding to the region on the DMD. The image to be projected is converted to obtain a DMD driving signal corresponding to the region, and is output to the DMD driving circuit to drive a corresponding region on the DMD for projection, so that each region on the DMD can project the corresponding image to be projected. The projections of different regions on the DMD are imaged on different areas of the screen through the lens assembly, thereby forming a split screen effect, achieving the effect of multi-screen projection, and overcoming the single defect of the prior art projection.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying for inventive labor.

1 is a schematic view showing deflection and reflection of light of two micromirrors on a DMD in the prior art;

2 is a schematic diagram of an OFFSET between a projector and an image on a screen in the prior art;

3 is a schematic structural diagram of a multi-screen projection apparatus according to some embodiments of the present invention;

4 is a schematic diagram of projection of a multi-screen projection device with 2 DMDs according to some embodiments of the present invention;

FIG. 5(a) is a schematic diagram showing an arrangement structure of a DMD in a multi-screen projection device with two DMDs according to some embodiments of the present invention; FIG.

FIG. 5(b) is a schematic diagram showing the imaging of the DMD in the multi-screen projection device with two DMDs provided in FIG. 5(a) according to some embodiments of the present invention;

6(a) is a schematic diagram showing still another arrangement structure of a DMD in a multi-screen projection device with two DMDs according to some embodiments of the present invention;

6(b) is a schematic diagram showing the corresponding DMD of the DMD in the multi-screen projection device with two DMDs provided in FIG. 6(a) according to some embodiments of the present invention;

FIG. 7(a) is a schematic diagram of a setting of a DMD in a multi-screen projection device with four DMDs according to some embodiments of the present invention;

FIG. 7(b) is a schematic diagram showing the imaging of the DMD in the multi-screen projection device with four DMDs provided in FIG. 7(a) according to some embodiments of the present invention;

FIG. 8 is a schematic structural diagram of another multi-screen projection apparatus according to some embodiments of the present invention; FIG.

FIG. 9 is a schematic diagram of projection of a multi-screen projection device implemented based on two regions on a DMD according to some embodiments of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a multi-directional projection apparatus according to some embodiments of the present invention; FIG.

FIG. 11 is a schematic diagram of multi-directional projection apparatus for multi-directional projection and imaging on a screen based on DMD-based movement provided by some embodiments of the present invention; FIG.

FIG. 12 is a schematic diagram of a mobile mode of a DMD corresponding to a projection in a left-right direction by a multi-directional projection device according to some embodiments of the present invention; FIG.

FIG. 13 is a schematic diagram of a mobile mode of a DMD corresponding to a projection in a vertical direction by a multi-directional projection device according to some embodiments of the present invention; FIG.

FIG. 14 is a schematic diagram of multi-directional projection of a DMD moving from a position X on a two-dimensional plane to positions Y, Z, and O on the same plane in a multi-directional projection apparatus according to some embodiments of the present invention.

Detailed ways

In order to make the objects, technical solutions and advantages of the present invention more clear, the following will be The invention is further described in detail, and it is apparent that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the existing projection technology, the field of view of the lens assembly is usually a circular symmetry plane, wherein the field of view can be understood as a object surface, and the image displayed on the screen can be understood as an image plane. In the projector, the DMD is located on the object surface of the lens, that is, within the field of view of the lens. The lens acts as an imaging component, and the light emitted by the DMD enters the lens and is projected onto the screen for imaging.

In order to realize multi-screen projection, the embodiment of the present invention provides a multi-screen projection device and method capable of realizing multi-screen projection based on the analysis of the optical architecture in the projection technology. It should be understood that realizing multi-screen projection means that the direction of projection can be various. Therefore, realizing multi-screen projection described in the embodiment of the present invention can also be understood as realizing multi-directional projection.

In the geometric optics of the projector, offset (OFFSET) is a measure used to measure the displacement of the DMD relative to the optical axis of the lens, such as in a 0% offset projection design, the center of the DMD and the projection lens. The optical axes are precisely aligned. In this design, the projected images projected by the DMD are equal above and below the optical axis, and in some designs such as ultra-short-throw projections, the center of the light emitted by the DMD is often made according to the requirements of the system. The optical axis does not coincide with the optical axis of the lens center, so that the projection needs are met by a certain offset, for example, a certain deviation within a range of 100% to 150% is set according to the application direction of the system.

This OFFSET between the DMD and the lens causes the image projected by the projector to be offset from the central optical axis of the lens. Fig. 2 shows an example of imaging on a projector and a screen with OFFSET. As shown in FIG. 2, the light emitted by the projector lens 201 is obliquely directed (large incident angle) onto the screen 202 to form a projected image, which is then reflected by the screen 202 and incident on the human eye to complete the projection display.

An optical architecture analysis of the OFFSET between the DMD and the optical axis of the lens can be seen that the optical structure does not fully utilize the lens assembly of the projector, and the optical aperture of some lenses can be filled with light, thereby achieving sufficient In some cases, the optical aperture of some lenses cannot be completely filled with light, and only a part of them can be utilized, that is, the entire optical aperture cannot be utilized.

The embodiment of the present invention provides a technical solution capable of simultaneously realizing multi-screen projection based on the above analysis of the optical structure and how to realize the full use of the effective aperture of the optical system. Specifically, the technical solution provided by the embodiment of the present invention achieves multi-screen projection by setting a plurality of DMDs in the field of view of the lens assembly, and also realizes effective use of the optical aperture of the lens assembly.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a schematic structural diagram of a multi-screen projection apparatus according to some embodiments of the present invention.

As shown in FIG. 3, a multi-screen projection apparatus provided by some embodiments of the present invention includes a signal processing system 301, a lens assembly 302, and N digital micromirror devices (DMD) 303; wherein N is greater than or equal to 2 Positive integer.

It should be understood that FIG. 3 only shows the components of the multi-screen projection device that are mainly involved in the present invention, and the multi-screen projection device provided by some embodiments of the present invention may further include the prior art. The projection device in which is included, such as an optical lens assembly, a heat dissipation system component, and the like. Since the present invention is not specifically related to the improvement of these constituent parts in the optical system, it will not be described in detail in the present invention.

As shown in FIG. 3, in the multi-screen projection apparatus provided by some embodiments of the present invention, the N DMDs 303 may be disposed within the field of view of the lens assembly 302 without overlapping each other.

As shown in FIG. 3, the signal processing system 301 is configured to convert the image to be projected corresponding to the DMD 303 into a DMD driving signal, and output the signal to the DMD driving circuit 304 corresponding to the DMD 303.

Further, the DMD driving circuit 304 is configured to drive the corresponding DMD 303 to perform projection according to the received DMD driving signal, wherein the projections of the different DMDs 303 are imaged by the lens assembly 302 onto different areas of the screen 305.

Specifically, for any one of the N DMDs 303, the DMD driving circuit 304 corresponding to the DMD 303 can be used to drive according to the DMD driving signal output by the signal processing system 301 and converted by the image to be projected corresponding to the DMD 303. The DMD 303 performs projection; the DMD 303 projects the image to be projected under the driving of the DMD driving circuit corresponding to the DMD.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the N DMDs 303 may each have an independent signal processing system 301, wherein the signal processing system 301 corresponding to any one of the DMDs 303 may be used for The image to be projected corresponding to the DMD 303 is converted into a DMD driving signal, and the DMD driving signal is output to the DMD driving circuit 304 corresponding to the DMD 303.

Optionally, in the multi-screen projection device provided by still another embodiment of the present invention, the N DMDs correspond to a unified signal processing system 301 (as shown in FIG. 3), wherein the unified signal The processing system 301 can be configured to convert the respective images to be projected corresponding to the N DMDs 303 into DMD driving signals, and output the DMD driving signals to the corresponding DMD driving circuits 304 of the N DMDs 303.

Further, for any one of the N DMDs 303, the DMD 303 is configured to project the image to be projected corresponding to the DMD 303 under the driving of the DMD driving circuit 304 corresponding to the DMD 303. Further, when the N DMDs 303 project the respective corresponding images to be projected, the respective corresponding projections are imaged on the N blocks of the screen 305 through the lens assembly 302.

Since in an optical system, an ideal lens can be considered as a simplified imaging assembly. For an ideal lens, the central optical axis of the light emitted by the object does not coincide with the central optical axis of the ideal lens, and is located at different positions within the field of view. Objects will be imaged in different imaging areas. It can be seen that, in the multi-screen projection apparatus provided by some embodiments of the present invention, N DMDs are set, and when the N DMDs are set, the N DMDs are distributed without overlapping with each other in the field of view of the lens assembly. Inside, since different DMDs are located at different positions within the field of view of the lens assembly, each DMD occupies a part of the field of view, so that projections of different DMDs can be imaged through the lens assembly to different areas of the screen, thereby forming points. The screen effect achieves the effect of multi-screen projection, and also realizes the effective use of the optical aperture of the lens assembly.

At the same time, it can be seen that, in the multi-screen projection device provided by some embodiments of the present invention, the N DMDs can also be respectively output by the respective corresponding signal processing systems according to the respective corresponding DMD driving signals. Driving, or may be driven by a unified signal processing system according to each of the N DMDs corresponding to the image to be projected output DMD driving signal, therefore, this Each of the N DMDs may be projected to correspond to the image to be projected, or may be understood as a corresponding display content, which may be different, and may be determined by a signal processing system, thereby satisfying one or more users at the same time. Watch the needs of different content.

It can be seen that the multi-screen projection device provided by some embodiments of the present invention can achieve the effect of multi-screen projection, and can also meet the requirement of one or more users to watch different content at the same time, and therefore is particularly suitable for some Need to project different information at the same time, promote the latter ads and other occasions that need to create better visual effects. Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the N DMDs 303 may specifically be symmetrically arranged with respect to the optical axis of the lens assembly 302 within the field of view of the lens assembly 302. The symmetrical arrangement will also enable the imaging of the DMD 303 to be projected onto the screen to remain symmetrical.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, N different sizes of DMDs 303 may be specifically used for setting.

For example, when two DMDs of the same size are used in the multi-screen projection apparatus provided by some embodiments of the present invention, they may be arranged symmetrically around the optical axis of the lens assembly, wherein the two DMDs are arranged. There is a deviation between the optical axis of the lens assembly and the optical axis of the lens assembly, so that the areas projected on the screen are symmetrical, and since the two DMDs are the same size, the areas projected on the screen have The same size.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, N different size DMDs may also be used for setting, and the size of the DMD projection on the screen may be different. of.

For example, in some embodiments of the present invention in which DMDs of different sizes are used, in order to achieve full utilization of the optical aperture, it is possible to set the target with the largest coverage area under the condition that the respective DMDs do not overlap. For example, it may be an asymmetric setting.

Further, in the multi-screen projection apparatus provided by some embodiments of the present invention, when the N DMDs are disposed without overlapping in the field of view of the lens assembly, the respective DMDs can be made as far as possible without affecting the operation of each other. The ground is close, that is, the spacing between the respective DMDs is reduced, thereby achieving the effect of reducing the corresponding spacing between the imaging regions on the screen, wherein between the imaging regions on the screen The interval is related to the corresponding OFFSET value of the DMD, the size of the DMD, and the lens magnification. The DMD is as close as possible, that is, the spacing between the DMDs is reduced, and the spacing of the projection areas corresponding to the screen is also reduced year by year.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the signal processing system may be specifically configured to: simultaneously output the image to be projected corresponding to each of the N DMDs to the DMD driving circuit corresponding to the N DMDs. The resulting DMD drive signal.

Further, the N DMDs in the multi-screen projection device shown in FIG. 3 can also perform time-sharing control, thereby realizing time-division display on multiple regions of the screen, or selecting which one or which to enable according to projection needs. The DMD works to achieve display on the corresponding area of the screen.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the signal processing system may be specifically configured to: according to the preset time-shadow projection configuration information, in a projection time period configured for the DMD, The DMD driving signal obtained by converting the image to be projected corresponding to the DMD is output to the DMD driving circuit corresponding to the DMD, and otherwise, the DMD driving signal is not outputted to the DMD driving circuit corresponding to the DMD.

Optionally, in the multi-screen projection device provided by still another embodiment of the present invention, the first control system may be further configured to output the first control to the DMD driving circuit according to the preset time-sharing projection configuration information. a signal and a second control signal, wherein the first control signal is used to control the DMD driving circuit to drive the corresponding DMD to be projected according to the DMD driving signal output by the signal processing system, and the second control signal is used to control the DMD driving circuit to drive the DMD The micromirrors are deflected to the off state.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, for the set of N DMDs, N light sources may be correspondingly disposed, and the N light sources may be used for respectively to the N DMDs. Provide an illumination beam.

For example, in the multi-screen projection apparatus provided by some embodiments of the present invention, each DMD is provided with a corresponding illumination system, each of which has an independent light source, and the illumination beams of each illumination system can respectively satisfy the corresponding The light requirements of the DMD.

Further, in order to achieve time-division display on multiple regions of the screen, some implementations of the invention The multi-screen projection device provided by the example may further include N light sources and a first control system; the N light sources are respectively used to provide illumination beams to the N DMDs; the first control system may be used Simultaneously controlling the turning on or off of the N light sources; or, may also be used to control the turning on or off of each of the N light sources according to preset time-sharing projection configuration information, wherein a DMD is in the Projection when the light source corresponding to the DMD is turned on.

Optionally, in the multi-screen projection device provided by the further embodiments of the present invention, for the set of N DMDs, a light source and a light splitting structure may be correspondingly disposed, wherein the light splitting structure may be used to The light beam emitted by the light source is divided into N beams and then the illumination beams are respectively supplied to the N DMDs.

For example, in the multi-screen projection apparatus provided by some embodiments of the present invention, only one illumination system is disposed, that is, only one light source is disposed, and a light splitting structure is disposed on the optical path of the light source to the DMD, for example, may be incident. And a beam splitter composed of an exit slit, a mirror and a dispersive element, and the beam splitting structure splits the beam of the illumination system to obtain an illumination beam capable of meeting the light incident requirements of each DMD.

Further, in order to realize time-division display on multiple areas of the screen, in the multi-screen projection apparatus provided by some embodiments of the present invention, a light source and a light splitting structure may be further included, and the first control system and the N light-shielding sheets between the light-splitting structure and the N DMDs:

Wherein, the N pieces of light shielding sheets respectively correspond to one DMD, that is, a light shielding sheet is respectively disposed between the light separating structure and each of the N DMDs, and each of the light shielding sheets is used for controlling the light separating structure to the sheet. The light path between the DMDs corresponding to the light shielding sheets is turned on and off.

Specifically, the first control system may be used to simultaneously control the opening or closing of the N pieces of the visor; or may be used to control each of the N visors according to the preset time-sharing configuration information. The opening or closing of the sheet, wherein when one of the visors is closed, the illuminating light beam that is irradiated onto the corresponding DMD of the visor is blocked, and a DMD is projected when the corresponding visor is opened.

In addition, the signal processing system can split the image to be projected into N pieces of image fragments to be projected, and convert the N pieces of image to be projected into N DMD driving signals, and output them according to a preset splicing order and a position of the DMD. Each DMD drives each DMD projection to its corresponding image to be projected. The pieces are thus stitched into a projected image. Compared with projecting an image by a DMD, each image of an image is projected by N DMDs, and then the image is restored by the splicing, so that a larger projected image size can be obtained, or a higher image can be obtained. Image Resolution.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the method further includes:

An optical splicing lens assembly disposed at a position of the lens assembly toward the screen direction side for adjusting a projection of the respective D DMD pairs corresponding to the image to be projected by the lens assembly to be imaged on the N block area of the screen Position, achieve the stitching of the imaging edge, in order to obtain better image stitching effect.

The optical splicing lens assembly may be a cylindrical mirror or the like, and a single optical splicing non-optimal scheme. The ideal seamless splicing corresponds to the state without the OFFSET. In the multi-screen projection device provided by some embodiments of the present invention, the image processing can be used to achieve seamless splicing.

In order to more clearly illustrate a multi-screen projection device with N DMDs provided by an embodiment of the present invention, N=2, that is, a multi-screen projection device with 2 DMDs provided by some embodiments of the present invention is taken as an example. The specific application of the multi-screen projection device provided by the embodiment of the present invention in an actual scenario and the technical effects that can be obtained are described.

For example, to meet the ultra-short-throw projection design, FIG. 4 is a schematic diagram showing projection of a multi-screen projection device with two DMDs provided by some embodiments of the present invention.

The multi-screen projection device shown in FIG. 4 has two DMDs (Dual DMDs), which are DMD 401 and DMD 402, respectively. Based on the ultra-short-focus projection design requirements, the DMD 401 and the DMD 402 are symmetrically disposed about the optical axis of the lens assembly 403, and have an OFFSET opposite to the optical axis of the lens assembly 403. Accordingly, it is assumed that the DMD 401 and the DMD 402 each have a corresponding signal processing system. In practical applications, the signal processing system corresponding to any one of the DMD 401 and the DMD 402 will be able to take the image pixel RGB component values in the image to be projected. Converting to a DMD drive signal, outputting to a corresponding DMD drive circuit, and driving, by the DMD drive circuit, the flip angle and duration of each micromirror on the corresponding DMD according to the DMD drive signal, under the illumination of the corresponding illumination beam, to satisfy each The pixels show the desired color.

As can be seen in the imaging area of the projected image as shown in FIG. 4, DMD 401 and DMD 402 The image can be simultaneously projected on the two image areas, the first imaging area 404 corresponding to the DMD 401 shown in FIG. 4, and the second imaging area 405 corresponding to the DMD 402, thereby forming a split screen effect. There is often a gap between the two display areas, which is determined by the OFFSET between the DMD and the lens. Of course, the DMD can be placed as close as possible so that the images projected onto the screen are guaranteed to be non-overlapping and have a small interval. Different users can watch different content at the same time (the display content is determined by the signal processing system).

Wherein, each illumination beam can be from an illumination system, and the beam is divided into two beams with angles by an optical splitting structure to respectively illuminate each DMD to meet the light entrance requirements of each DMD. Alternatively, there may be two sets of light sources, each having its own illumination system.

Further, the DMD 401 and the DMD 402 can also display content in a time-sharing manner, which can be controlled by turning off or turning on the illumination optical system (including sharing a set of illumination systems or each having an independent illumination system), or by corresponding to each DMD. The DMD driver circuit outputs different control signals to control the time sharing of each DMD.

Further, the DMD 401 and the DMD 402 can also be displayed separately, which can be projected according to the needs of the projection, that is, on which area on the screen, and which DMD is to be activated, and any DMD will only be projected to The position of a corresponding area on the screen is projected and displayed.

Further, since the viewing scene is a symmetric circular surface, the DMD 401 and the DMD 402 in the multi-screen projection apparatus shown in FIG. 4 may be specifically set as shown in FIG. 5(a) or FIG. 6(a), and respectively formed. The imaging area shown in Fig. 5 (b) or Fig. 6 (b).

As shown in FIG. 5( a ), the DMD 401 and the DMD 402 may be disposed symmetrically about the optical axis of the center of the field of view, that is, the lens assembly, so that two left and right projection areas may be formed on the screen, as shown in FIG. 5 . (b) the left and right imaging areas (the projection area L corresponding to the DMD 401 and the projection area R corresponding to the DMD 402); or, as shown in FIG. 6(a), the DMD 401 and the DMD 402 may It is set to be vertically symmetrical about the center of the field of view, so that two upper and lower projection area images can be formed on the screen, as shown in FIG. 6(b), the upper and lower imaging areas (the projection area D corresponding to the DMD 401 and the DMD 402 correspond to Projection area U); or DMD 401 and DMD 402 It can also be arranged at different fields of view, and a corresponding projection area can also be formed on the screen.

Here, if the DMD 401 and the DMD 402 and the set positions as shown in FIG. 5(a) or FIG. 6(a), since the DMD 401 and the DMD 402 have the same size, the corresponding projection area sizes are also the same.

Further, the optical splicing element can be added in the direction of the lens component to the screen to compensate the spacing between the imaging regions caused by the inevitable physical gap of the DMD 401 and the DMD 402 during the setting, so that the projection area is approximated. Stitching.

The present invention can be easily understood by the specific description of the multi-screen projection apparatus provided by the embodiment of the present invention by using the above-described multi-screen projection apparatus with two DMDs provided by N=2, that is, some embodiments of the present invention. Still other embodiments provide a multi-screen projection device with more than two DMDs in practice and the projection effects that can be achieved.

For example, in order to more fully utilize the field of view range of the lens assembly, the multi-screen projection apparatus provided by still other embodiments of the present invention may set a plurality of DMDs in the field of view area, such as shown in FIG. 7(a). The arrangement has four DMD multi-screen projection devices, and FIG. 7(b) is an imaging schematic corresponding to the settings of the four DMDs as shown in FIG. 7(a).

The four DMDs (DMD 701, DMD 702, DMD 703, and DMD 704) as shown in FIG. 7(a) may be symmetrically arranged, or the four DMDs may be asymmetrically arranged. The four DMDs can be the same or different in size, and the four DMDs of different sizes can be projected and imaged in four image areas of different sizes, corresponding to the projection areas U and DMD702 corresponding to the DMD 701 shown in FIG. 7(b). The projection area D, the projection area R corresponding to the DMD 703, and the projection area L) corresponding to the DMD 704.

The specific principle of the four DMD imaging shown in FIG. 7(a) can be referred to the foregoing description. Similar to the foregoing scheme, the four DMDs can also control the display at the same time, or can be time-sharing and/or sub-regional. The control drive realizes the effect of time-sharing using different projection areas for projection imaging.

Similar to the foregoing scheme, each of the four DMDs shown in FIG. 7(a) may have an independent illumination system, or may share a large illumination system as long as the illumination beam can completely cover each DMD. Just fine.

As can be seen from the above description, in the multi-screen projection apparatus provided in the embodiment of the present invention, the N DMDs are set, and when the N DMDs are set, the N DMDs are distributed to the lens component without overlapping each other. In the field range, not only the utilization of the field of view is improved, but also the optical aperture of the lens assembly can be fully utilized. At the same time, different DMDs are distributed at different positions within the field of view of the lens assembly, so that the corresponding projections are respectively Through the lens assembly, the image will be imaged on different areas of the screen to form a split screen effect, which achieves the effect of multi-screen projection. Even if the lens is ultra-short-focus, it can be realized not only in the ultra-short-focus projection direction and region requirements. Multi-screen projection.

At the same time, it can be seen that, in the multi-screen projection device provided by some embodiments of the present invention, since the N DMDs can also project the corresponding images to be projected, or can also be understood as corresponding display contents, The need for one or more users to view different content at the same time. Further, the N DMDs in the multi-screen projection device provided by some embodiments of the present invention may also perform time-sharing control, thereby implementing time-division display on multiple regions of the screen, or selecting which one to enable or according to projection needs. Which DMDs work to achieve display (partition display) on the corresponding area of the screen.

In addition, in the multi-screen projection apparatus provided by some embodiments of the present invention, since N DMDs can respectively project a certain portion of a projected image, the projections of the N DMDs can be spliced into one projected image. Compared with projecting an image by a DMD, each part of an image is projected by N DMDs and then the images are stitched and restored to obtain a larger projected image size or a higher image resolution. .

Based on the same technical concept, the embodiment of the present invention further provides a multi-screen projection method, which can be implemented by the above device embodiment.

The multi-screen projection method includes:

Setting N DMDs that do not overlap each other within a field of view of the projection lens of the projection device, where N is a positive integer greater than or equal to 2;

Converting the image to be projected corresponding to each of the DMDs to a DMD driving signal, and outputting the DMD driving circuit to the DMD driving circuit, so that the DMD driving circuit drives the corresponding DMD to perform projection according to the received DMD driving signal, wherein different Projection of the DMD through the lens The components are imaged onto different areas of the screen.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the N DMD driving signals converted by the N DMD corresponding images to be projected may be simultaneously output to the D DDM driving circuits corresponding to the N DMDs. .

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, after the image to be projected corresponding to the DMD is converted into the DMD driving signal, the configuration may be configured according to the preset time-sharing projection configuration information. During the projection period, the DMD driving signal is output to the DMD driving circuit corresponding to the DMD, otherwise, the DMD driving signal is not output to the DMD driving circuit corresponding to the DMD.

Optionally, in the multi-screen projection method provided by still another embodiment of the present invention, the first control signal and the second control signal may be output to the DMD driving circuit according to the preset time-sharing projection configuration information. A control signal is used to control the DMD driving circuit to drive the corresponding DMD to perform projection according to the received DMD driving signal, and the second control signal is used to control the DMD driving circuit to drive the micromirrors on the DMD to be deflected to the off state.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the multi-screen projection device further includes N light sources, wherein the N light sources are respectively used to provide illumination beams to the N DMDs; The multi-screen projection method may further include:

Simultaneously controlling the turning on or off of the N light sources; or controlling the turning on or off of each of the N light sources according to preset time-sharing projection configuration information, wherein a DMD is turned on in the DMD corresponding light source Projection.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the multi-screen projection device further includes a light source and a light splitting structure, wherein the light splitting structure is configured to divide the light beam emitted by the one light source Providing an illumination beam to the N DMDs respectively after the N beam; the multi-screen projection method may further include:

Simultaneously controlling the opening or closing of the N-piece visor; or controlling the opening or closing of each of the N visors according to the preset time-sharing configuration information, wherein the N visors respectively correspond to a DMD, which is used to block the illumination corresponding to the visor when the visor is closed The illumination beam on the DMD, a DMD is projected when the corresponding shading of the DMD is turned on.

Optionally, the multi-screen projection method may further include: splitting the image to be projected into N pieces of image fragments to be projected, and converting the N pieces of image to be projected into N DMD driving signals according to a preset splicing. The order and the position of the DMD are respectively output to the respective DMDs, and each DMD is driven to project its corresponding image fragments to be projected, thereby being spliced into a projected image.

Based on the optical structure analysis described above, the embodiment of the present invention further provides a technical solution capable of implementing multi-screen projection. Specifically, by dividing the DMD into a plurality of regions that do not overlap each other, the signal processing system performs signal processing on the DMD in units of regions, and converts the image to be projected corresponding to the region on the DMD to obtain a DMD driving signal corresponding to the region. And output to the DMD driving circuit to drive the corresponding area on the DMD for projection, to achieve multi-screen projection, thereby forming a split screen effect, overcoming the single defect of the prior art projection.

FIG. 8 is a schematic structural diagram of a multi-screen projection apparatus according to some embodiments of the present invention.

As shown in FIG. 8, a multi-screen projection apparatus provided by some embodiments of the present invention includes a signal processing system 801, a lens assembly 802, and a digital micromirror device DMD 803.

It should be understood that FIG. 8 only shows the components of the multi-screen projection device that are mainly involved in the present invention, and the multi-screen projection device provided by some embodiments of the present invention may further include the prior art. The projection device in which is included, such as an optical lens assembly, a heat dissipation system component, and the like. Since the present invention is not specifically related to the improvement of these constituent parts in the optical system, it will not be described in detail in the present invention.

Specifically, the DMD 803 is divided into regions in which N blocks do not overlap each other, and N is a positive integer greater than or equal to 2. For example, as shown in FIG. 8, the DMD 803 is divided into regions in which N blocks do not overlap each other, for example, the first block region 8031, the Nth block region 803N in the DMD 803 in FIG. 8, and the i-th block in the N block regions. Area 803i. The principle of the upper multi-area division of the DMD is as follows: the N-channel image signal is received, N is an integer greater than or equal to 2, and the N-channel image signal is converted into a DMD driving signal corresponding to the N-block region on the DMD.

The signal processing system 801 is configured to convert the image to be projected corresponding to the i-th block area on the DMD 803 The DMD driving signal corresponding to the area is exchanged and output to the DMD driving circuit 304 corresponding to the DMD 303, where i is a positive integer less than or equal to N.

Further, the DMD driving circuit 804 is configured to drive a corresponding area on the DMD 803 to perform projection according to the received DMD driving signal.

Specifically, for any block area 803i on the DMD 803, the signal processing system 801 can convert the image to be projected corresponding to the image signal corresponding to the area 803i on the DMD 803 to obtain the DMD driving signal of the corresponding area 803i, and the DMD driving circuit 804 can further The region 803i on the DMD 803 is driven to be projected according to the DMD driving signal of the corresponding region 803i output from the signal processing system 801; the micromirror array on the region 803i on the DMD 303 is projected by the DMD driving circuit to project the image to be projected.

In the multi-screen projection apparatus provided by some embodiments of the present invention, the N blocks on the DMD 803 do not overlap each other, and thus it can be understood that the N blocks on the DMD 803 are located at different positions within the field of view, each of the respective regions. Occupying a portion of the field of view, so that the N blocks on the DMD 803 can be projected onto the respective corresponding image to be projected, and the corresponding projections are imaged by the lens assembly 802 on the N different regions of the screen 805, thereby The effect of multi-screen projection is achieved.

In the multi-screen projection apparatus provided by some embodiments of the present invention, the DMD 803 can employ a larger size DMD to achieve the effect of making full use of the optical aperture of the lens assembly.

At the same time, it can be seen that, in the multi-screen projection device provided by some embodiments of the present invention, the N blocks in the DMD 803 are respectively output by the signal processing system according to the image to be projected (image signal) corresponding to the N blocks. The corresponding DMD driving signals are driven. Therefore, the images to be projected corresponding to the projections of the N DMDs may be the same or different, and thus can satisfy one or more users to view different contents at the same time. demand.

Alternatively, in the multi-screen projection apparatus provided by some embodiments of the present invention, the N-block regions on the DMD 803 may be symmetrically arranged with respect to the optical axis of the lens assembly 802. This symmetrical arrangement will enable the DMD 803 to be placed on the DMD 803. The image area projected onto the screen by the N blocks is also symmetrical.

It should be noted that, according to the above, a plurality of regions on the DMD are actually address ranges of micromirrors on the DMD allocated for each image signal. Specifically, different DMD regions have mutual The intersecting micromirror address ranges (ie, address ranges without overlapping intervals), thereby making each DMD region non-overlapping each other. The size of the area on the DMD can actually be reflected as the number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and/or the shape size formed by the micromirrors in the address range.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the size of the N block region on the DMD 803 may be determined according to a preset size. For example, if a uniform size setting value is pre-set, the size of the N block area on the DMD 803 may be the same as the size setting value, that is, the micro-mirror address range on the DMD allocated for each image signal. The number of mirrors and the shape of the micromirrors in the address range are the same. For example, for different regions on the DMD 803, different size settings are pre-set, and the size of the N regions on the 803 can be different. The corresponding size setting values are the same, that is, the number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and/or the shape formed by the micromirrors in the address range are different.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the size of the N block region on the DMD 803 may be determined according to the size of the DMD 803 and the preset number of partitions, that is, according to the DMD. The size of the 803 and the preset number of partitions are determined as the address range of the micromirror on the DMD allocated to each image signal and/or the shape of the micromirror in the address range. For example, the size of the DMD 803 can be pre-prescribed. The number of partitions is equally divided, and the size of the micromirror on the DMD of the image signal distribution and/or the shape of the micromirror in the address range are determined in equal parts.

The size setting value, the size of the DMD, and the preset number of partitions may be obtained by reading a stored configuration file by the signal processing system.

Optionally, in the multi-screen projection apparatus provided by some embodiments of the present invention, the signal processing system 801 may also determine the DMD 803 according to the size of the DMD 803 and the number of image signals (the number of images to be projected). The size of the N block area, that is, the address range of the micromirror on the DMD allocated to each image signal and/or the shape formed by the micromirror in the address range according to the size of the DMD 803 and the number of image signals, for example, The size of the DMD 803 can be equally divided according to the number of image signals, and the address range of the micromirror on the DMD of the image signal distribution and/or the shape of the micromirror in the address range can be determined in equal division.

Optionally, since a micromirror on the DMD is equivalent to one pixel in the projected image, in the multi-screen projection device provided by still another embodiment of the present invention, the size of the N block region on the DMD 803 may be determined. For the resolution of the image to be projected corresponding to each, the signal processing system 801 can determine the size of the N block area on the DMD 303 according to the resolution of the image to be projected, that is, determine the image signal according to the resolution of the image to be projected. The address range of the micromirror on the assigned DMD and/or the shape of the micromirror in the address range, wherein the size of an area is proportional to the resolution of the image to be projected corresponding to the area. For example, the resolution of the image to be projected corresponding to the region 803i is higher than the resolution of the image to be projected corresponding to the region 803N, and then the size of the region 803i may be larger than the size of the region 803N.

Specifically, the areas of the DMD 803 having the same size on the screen will also have the same size, and the areas of the different sizes of the areas projected on the screen will have different sizes.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the signal processing system 801 can simultaneously output the corresponding N obtained by converting the image to be projected corresponding to the N block regions on the DMD 803 to the DMD driving circuit 804. DMD drive signal for the block area.

Further, the N-block area on the DMD 803 in the multi-screen projection apparatus shown in FIG. 8 can also perform time-division control, thereby realizing time-division display on multiple areas of the screen, or selecting DMD on the basis of projection needs. Which piece or areas are used for projection work to achieve display (partition display) on the corresponding area of the screen.

Optionally, in the multi-screen projection device provided by some embodiments of the present invention, the signal processing system 801 may be configured to be in the ith block region on the DMD 803 according to preset time-shadow projection configuration information. During the time period, the DMD driving signal of the corresponding region obtained by converting the image to be projected corresponding to the region is output to the DMD driving circuit 804. Otherwise, the DMD driving signal corresponding to the region is not output.

For example, assuming that the i-th block region 803i and the N-th block region 803N are configured to be projected in the A time period in the preset time-shadow projection configuration information, the signal processing system 801 sends the DMD to the DMD in the A time period. The drive circuit 304 outputs a DMD drive signal obtained by converting the image to be projected corresponding to the i-th block region 803i and the N-th block region 803 to drive the two regions for projection. In other time periods, the driving signals corresponding to the two regions are not output to the DMD driving circuit 304.

The time-sharing projection configuration information may be embodied as a periodic time-sharing projection of the N-block region, or a time-sharing projection of the randomness of the N-block regions. The time-sharing projection configuration information may also be obtained by reading a stored configuration file by the signal processing system, or may be changed or reset by providing a software interface to the user or the like.

Optionally, in order to implement time-division display on multiple areas of the screen, in the multi-screen projection apparatus provided by still another embodiment of the present invention, a first control system may be further included, according to a preset time division. Projecting configuration information, outputting a control signal to the DMD driving circuit to control the DMD driving circuit to drive the DMD driving signal outputted by the signal processing system according to the DMD driving signal of the signal processing system, and to project the area that needs to be projected according to the time-sharing projection configuration information, and control the DMD The driving circuit drives the micromirrors on the DMD that are not required to be projected according to the time-shadow projection configuration information to be deflected to a closed state.

In order to clarify the multi-screen projection device based on the N-block region on the DMD provided by the embodiment of the present invention, N=2, that is, the implementation of the two regions based on the DMD provided by some embodiments of the present invention is described below. The multi-screen projection device is taken as an example to describe the specific application of the multi-screen projection device provided in the embodiment of the present invention and the technical effects that can be obtained.

For example, FIG. 9 is a schematic diagram showing projection of a multi-screen projection device based on two regions on a DMD provided by some embodiments of the present invention.

The multi-screen projection device shown in FIG. 9 has a DMD, and the DMDs are not overlapped with each other by two regions, which are respectively an area A 901 and an area B 902, which respectively correspond to two image signals (not Graphic). The area A 901 and the area B 902 are symmetrically disposed about the optical axis of the lens assembly 903, and have an OFFSET opposite to the optical axis of the lens assembly 903. Correspondingly, assuming that the DMD corresponds to a signal processing system, the signal processing system can convert the image pixel RGB component values in the image to be projected corresponding to the area A 901 into the DMD driving signals corresponding to the area A 901, and output the signals to the DMD driving circuit. The DMD driving circuit drives the flip angle and duration of each micromirror on the corresponding area A 901 according to the DMD driving signal, and satisfies the color required for each pixel display under the illumination of the corresponding illumination beam; the area B 902 performs Projection display process and area A 901 is basically the same.

In some scenarios with time-sharing projection requirements, the signal processing system may output a corresponding driving region of the region to be projected to the DMD driving circuit according to the corresponding projection area corresponding to each time, or output to the DMD driving circuit. Each area correspondingly outputs different control signals to control each area to realize time-sharing work, for example, area A 901 and area B 902 are time-divisionally projected, or may be simultaneously projected or not projected. Further, the area A 901 and the area B 902 can also be displayed separately, which can select which area to activate according to the needs of the projection.

As shown in the imaging area of the projected image as shown in FIG. 9, it can be seen that the area A 901 and the area B 902 can be simultaneously projected onto the two image areas on the screen, as shown by the area A 901 shown in FIG. An imaging area 904, and a second imaging area 905 corresponding to the area B 902, thereby forming a split screen effect. There is often a gap between the two display areas, which is determined by the OFFSET between the DMD and the lens. Of course, the two areas can be set as close as possible, such as adjacent, so that the image projected onto the screen is guaranteed. They do not overlap and have small intervals for different users to view different content at the same time (the display content is determined by the signal processing system).

Further, since the view scene is a symmetric circular surface, the area A 901 and the area B 902 in the multi-screen projection apparatus shown in FIG. 9 may be specifically set as shown in FIG. 5(a) or FIG. 6(a). And forming an image forming area as shown in Fig. 5 (b) or Fig. 6 (b), respectively. For a detailed description of FIGS. 5(a)(b) and 6(a)(b), reference is made to the above embodiment of a multi-screen projection apparatus including N DMDs.

For another example, the multi-screen projection device provided by still another embodiment of the present invention may be a multi-screen projection device implemented based on four regions on the DMD, and specifically refer to FIG. 7(a)(b). For a detailed description of FIG. 7(a)(b), see the above embodiment of a multi-screen projection apparatus including N DMDs.

The specific principle of imaging in four areas on a DMD can be seen in the foregoing description. Similar to the previous embodiment, the four areas can also control the display at the same time, or can control the driving in a time-sharing and/or differential manner. The effect of projection imaging is performed using different projection areas.

As can be seen from the above description, in the multi-screen projection device provided in the embodiment of the present invention, the base The number of image signals DMD is divided into a plurality of regions that do not overlap each other, and the signal processing system performs signal processing on the DMD in units of regions, and converts the image to be projected corresponding to the region on the DMD to obtain a DMD driving signal corresponding to the region. And outputting to the DMD driving circuit to drive the corresponding area on the DMD for projection, so that each area on the DMD can project the corresponding image to be projected, and at the same time, because the N areas do not overlap each other, the DMD is different. The projection of the area will be imaged on different areas of the screen through the lens assembly, thereby forming a split screen effect, achieving the effect of multi-screen projection, overcoming the single defect of the prior art projection, and at the same time, because of the multi-screen display, In order to improve the utilization of the field of view, the optical aperture of the lens assembly is fully utilized.

At the same time, it can be seen that, in the multi-screen projection device provided by some embodiments of the present invention, the N blocks on the DMD can also project the corresponding images to be projected, or can also be understood as corresponding display contents. Thereby, the need for the user to view different content at the same time can be satisfied.

Further, the N-block area on the DMD in the multi-screen projection apparatus provided by some embodiments of the present invention may also perform time-sharing control, thereby implementing time-division display on multiple areas of the screen, or selecting to enable according to projection requirements. Which piece or sections of the area are projected to achieve display on the corresponding area of the screen, further enriching the visual effect of the projection.

The multi-screen projection method includes:

Projecting a corresponding area on the DMD according to the received DMD driving signal; projections of different areas on the DMD are imaged by the lens assembly onto different areas of the screen.

Optionally, the multi-screen projection method provided by some embodiments of the present invention may further include:

Dividing the DMD into N regions that do not overlap each other according to a preset number of partitions N, and determining an area on the DMD corresponding to the image to be projected; or, according to the number of image signals (the number of images to be projected) N, dividing the DMD into N regions that do not overlap each other, and determining The regions on the DMD corresponding to the N images to be projected are described.

Determining the size of the N block area on the DMD according to a preset size; or

Determining a size of the N block area on the DMD according to a size of the DMD and a preset number of partitions; or

Determining the size of the N block area on the DMD according to the size of the DMD and the number of images to be projected (the number of image signals); or

Determining the size of the N block region on the DMD according to the resolution of the image to be projected; wherein the size of the block region is proportional to the resolution of the image to be projected corresponding to the region.

For a specific explanation of the size of the area on the DMD in this embodiment, refer to the specific description of the size of the area on the DMD in the multi-screen projection apparatus described above, and details are not described herein again.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the image to be projected corresponding to the N block regions on the DMD may be converted into a DMD driving signal corresponding to the N block regions, and simultaneously output to the DMD. a driving circuit; or, after converting the image to be projected corresponding to the i-th block region on the DMD to obtain a DMD driving signal corresponding to the region, the information may be in accordance with the preset time-sharing projection configuration information on the DMD The DMD driving signal corresponding to the corresponding area is output to the DMD driving circuit number in the projection time period configured by the i block area, otherwise, the DMD driving signal of the corresponding area is not output.

Optionally, in the multi-screen projection method provided by still another embodiment of the present invention, the control signal may be output to the DMD driving circuit according to the preset time-sharing projection configuration information, where the control signal is used to control the DMD driving circuit. Driving, according to the received DMD driving signal, the area on the DMD that needs to be projected according to the time-shadow projection configuration information, and controlling the DMD driving circuit to drive the DMD to perform projection according to the time-sharing projection configuration information. The micromirrors of the area are deflected to the off state.

The embodiment of the invention also provides a technical solution capable of realizing multi-directional projection. The technical solution provided by the embodiment of the present invention utilizes the OFFSET offset value between the DMD and the lens component, and controls the DMD to perform small amplitude movement in the field of view of the lens component to ensure normal projection. The multi-directional projection effect is achieved.

FIG. 10 is a schematic structural diagram of a multi-directional projection apparatus according to some embodiments of the present invention.

As shown in FIG. 10, a multi-directional projection apparatus provided by some embodiments of the present invention includes a control system 1001, a lens assembly 1002, and a digital micromirror device DMD 1003; wherein the DMD 1003 is mounted on the movable mechanical component 1004. .

It should be understood that FIG. 10 only shows the components involved in the multi-directional projection in the multi-directional projection apparatus provided by the embodiments of the present invention, and the multi-directional projection apparatus provided by some embodiments of the present invention also Optical lens assemblies, heat dissipation system components, and the like, which are commonly found in projection devices of the prior art, may be included. Since the present application does not relate to improvements in these components, in the present application, components such as an optical lens assembly, a heat dissipation system component, and the like will not be described in detail.

As shown in FIG. 10, the control system 1001 can control the movable mechanical component 1004 where the DMD 1003 is located to drive the DMD 1003 disposed on the movable mechanical component 1004 to move and/or twist, so that the DMD 1003 is directed to the target imaging area. The direction is projected, and the projected image is imaged by the lens assembly 1002 onto the target imaging area of the screen 1005.

FIG. 10 exemplarily shows three positions that the DMD 1003 can achieve by moving the movable mechanical component 1004: position X, position Y, and position Z.

It should be noted that the movement of the DMD 1003 is not limited to the two-dimensional plane perpendicular to the optical axis of the lens assembly 1002 where the DMD 1003 itself is located as shown in FIG. 10, and the multi-directional projection technique provided by the embodiment of the present invention. In the solution, the DMD 1003 can be regularly or irregularly moved and/or twisted in a three-dimensional space formed by the field of view of the lens assembly 1002, driven by the movable mechanical component 1004. For example, the DMD 1003 can be horizontally moved along the optical axis direction of the lens assembly 1002, can be moved at an angle to the optical axis direction of the lens assembly 1002, etc.; the DMD 1003 can be twisted, for example, rotated at a certain angle along its own central axis, etc. The movement and twisting of the DMD 1003 can occur simultaneously or separately.

In the multi-directional projection device provided by some embodiments of the present invention, the DMD is mounted on the movable machine On the mechanical component, the DMD disposed on the movable mechanical component is moved and/or twisted by controlling the movable mechanical component where the DMD is located, so that the DMD can flexibly project toward the direction of the different target imaging regions, DMD The projections in different directions are correspondingly imaged onto different target imaging regions of the screen, thereby achieving the effect of multi-directional projection, overcoming the defects of single projection in the prior art, and enriching the visual effects that can be achieved by projection. At the same time, since the DMD can be moved and/or twisted within the field of view of the lens assembly by the movable mechanical component in which it is located, the effect of making full use of the optical aperture of the lens assembly is also achieved.

Optionally, in the multi-directional projection device provided by some embodiments of the present invention, the control system 1001 may specifically control the movable component 1004 to drive the movement of the DMD 1003 within the field of view of the lens assembly 1002 by using the following process and/or Or reverse:

The control system 1001 first acquires the orientation information of the target imaging region; and further determines the target position of the DMD 1003 to project the direction of the target imaging region within the field of view of the lens assembly 1002 according to the orientation information of the target imaging region; the control system 1001 Further calculating a displacement and/or a twist angle of the DMD 1003 to move from the current position to the target position; thereby controlling the displacement and/or the twist angle of the DMD 1003 to move to the target position according to the calculation, and controlling the movable activity of the DMD 1003 The mechanical component 1004 drives the DMD 1003 disposed on the movable mechanical component for movement and/or twisting.

Specifically, the target imaging area in the above process may be preset, such as the control system 1001 acquiring by reading the stored configuration file, or the control system 1001 may support the user to set or change by providing a software interface.

Optionally, in the multi-directional projection device provided by still another embodiment of the present invention, the control system 1001 may specifically control the movable component 1004 to drive the movement of the DMD 1003 within the field of view of the lens assembly 1002 by the following process. And / or reverse:

The control system 1001 first acquires a motion trajectory of the preset DMD in the field of view of the lens component 1002, and the motion trajectory of the preset DMD corresponds to a preset target imaging area;

Control the movable mechanical part where the DMD 1003 is located according to the obtained movement trajectory of the DMD The piece 1004 drives the DMD 1003 disposed on the movable mechanical component 1004 to move and/or twist.

Specifically, the motion trajectory of the preset DMD in the above process in the field of view of the lens component 1002 may be acquired by the control system 1001 by reading the stored configuration file, or the control system 1001 may also provide a software interface. The way to support the user to set or change the motion trajectory of the DMD within the field of view of the lens assembly.

It should be noted that during the movement and/or twisting of the DMD 1003 under the driving of the movable component 1004 controlled by the control system 1001, the operation of the micromirror array on the DMD 1003 is not affected, for example, the DMD 1003 is The process of projection display can still be performed during the process of moving and/or twisting, and the imaging of the projected image on the screen correspondingly exhibits a moving trajectory corresponding to the motion of the DMD 1003, which will be expressed as a continuous visual effect; The DMD 1003 can stop the projection display during the movement and/or twisting process, and only perform the projection display when the target position is reached, so that the imaging of the projected image on the screen correspondingly presents a visual effect of jumping; Visual effects compensate for the lack of visual richness of the single projection technique of the prior art.

For example, the DMD can move along the preset motion trajectory within the field of view of the lens assembly at a set moving speed according to a set period, thereby enabling a regular periodic variation of the multi-directional projection. effect. Such effects can often be applied to scenes that require high visual effects, such as advertising.

Due to the movement and/or torsion of the corresponding DMD, it should be ensured that after the DMD is transmitted and/or twisted, the illumination beam irradiated onto the DMD can also be offset by a corresponding angle, and the DMD can be illuminated according to the normal incident DMD. . Optionally, in the multi-directional projection device provided by some embodiments of the present invention, a mirror assembly may be further included, the mirror assembly being disposed between the DMD and the illumination system for satisfying incidence of light to the DMD angle Adjustment requirements.

In particular, the angle of reflection of the mirror assembly can be controlled by a control system. In a multi-directional projection apparatus provided by some embodiments of the present invention, the control system can be adapted to adjust the mirror assembly according to the movement and/or torsion of the DMD. The angle is such that the DMD is always within the illumination range of the illumination system.

In the prior art, in order to make the black circle or strip region of the image not in the place where the light beam is not irradiated on the DMD, in the design of the projection device, the light beam is usually completely covered by the entire DMD surface, and is left. There is a margin for the design of the projection device based on the lighting scheme of the prior art, in the multi-directional projection device provided by some embodiments of the present invention, if the DMD corresponds to the field of view of the lens assembly The space that can be moved and/or twisted is small, and the illumination beam can ensure that all of the DMDs located anywhere in the space are covered, and the mirror assembly may not be included to simplify the structure of the device.

It can be seen that the DMD 1003 may be specifically driven by the movable mechanical component 1004 under the control of the control system 1001 to move and/or twist in a three-dimensional space formed by the field of view of the lens assembly 1002, in the present application. For convenience of description, the following description will be mainly made by the control system 1001 controlling the movement of the movable component 1004 to drive the DMD 1003 on a two-dimensional plane.

It should be noted that the movable mechanical component and related control system of the multi-directional projection device provided by this embodiment can be combined with any of the above embodiments of the multi-screen projection device to constitute a multi-screen projection device including a movable DMD.

In order to more clearly illustrate a multi-directional projection apparatus provided by an embodiment of the present invention, the movement of the DMD 1003 from the position X on the two-dimensional plane to the position of the movable mechanical part 1004 controlled by the control system 1001 will be hereinafter. The position Y is taken as an example to describe the specific application of the multi-directional projection device provided in the embodiment of the present invention in the actual scenario and the technical effects that can be obtained.

FIG. 11 is a schematic diagram showing a multi-directional projection apparatus for projecting in two directions according to some embodiments of the present invention.

The multi-directional projection apparatus shown in Figure 11 has a DMD 1003 disposed on a movable mechanical component 1004 that is located at a position X 1101 on a two-dimensional plane at a first time. Under the control of the control system 1001, the movable mechanical component 1004 drives the DMD to a position Y 1102 on the two-dimensional plane.

It is assumed that the position X 1101 and the position Y 1102 are symmetrically disposed centering on the optical axis of the lens assembly 1103, and have an OFFSET opposite to the optical axis of the lens assembly 1103. Correspondingly, it is assumed that the DMD corresponds to a signal processing system, and when the DMD is located at the position X 1101 on the two-dimensional plane at the first moment, The signal processing system can convert the image pixel RGB component value in the corresponding image to be projected into a DMD driving signal, and output it to the DMD driving circuit, and the DMD driving circuit drives each micro DMD located on the position X 1101 according to the DMD driving signal. The flip angle and duration of the mirror, under the illumination of the corresponding illumination beam, to satisfy the color required for each pixel display, thereby imaging the region 1104 on the screen 1005; when the DMD reaches the position Y 1102 on the two-dimensional plane The signal processing system can perform the same processing on the projected image, output the DMD drive signal to the DMD drive circuit, and image the area 1105 on the screen 1005.

Further, since the apparent scene is a symmetric circular surface, FIG. 12 shows a schematic diagram of multi-directional projection of the DMD from position X 1201 on the two-dimensional plane to position Y 1202 in some embodiments of the present invention, FIG. 5(b) Corresponding to the imaging region of FIG. 12; FIG. 13 is a schematic diagram showing multi-directional projection of the DMD from position X 1301 on the two-dimensional plane to position Y 1302 in some embodiments of the present invention, and FIG. 6(b) corresponds to FIG. Imaging area.

As shown in FIG. 12, the DMD moves from position X 1201 to position Y 1202, and position X 1201 and position Y 1202 are bilaterally symmetric about the center of the field of view, that is, the optical axis of the lens assembly, assuming that the DMD is projected at both positions, In this way, the direction of the two projections of the DMD is left-right symmetric, and two left and right projection area images are successively formed on the screen, as shown in FIG. 5(b), two left and right imaging areas (the projection area L and the position corresponding to the position X 1201) Y 1202 corresponds to the projection area R).

As shown in FIG. 13, the DMD moves from position X 1301 to position Y 1302, and position X 1301 and position Y 1302 are vertically symmetrical about the center of the field of view, that is, the optical axis of the lens assembly, assuming that the DMD is projected at both positions, Thus, the direction of the two projections of the DMD is vertically symmetrical, and two upper and lower projection regions are successively formed on the screen, as shown in FIG. 6(b), the upper and lower imaging regions (the projection region D and the position corresponding to the position X 1301). Y 1302 corresponds to the projection area U).

For another example, FIG. 14 illustrates a schematic diagram of an example of multi-directional projection of DMD from position X on a two-dimensional plane to positions Y, Z, O on the same plane, in some embodiments of the present invention, FIG. (b) corresponds to the imaging area of FIG.

As shown in FIG. 14, the DMD is sequentially moved from position X 1401 to position Y 1402, position Z 1403, position O 1404 in a counterclockwise order, assuming that the DMD is projected at four positions, In this way, the direction of the four projections of the DMD will also appear as a counterclockwise rotation, and on the screen, four projection areas appear successively in a counterclockwise order, as shown in Fig. 7(b), four imaging areas, position X 1401 The corresponding projection area U, the projection area L corresponding to the position Y 1402, the projection area D corresponding to the position Z 1403, and the projection area R corresponding to the position O 1404 are sequentially displayed in the order of counterclockwise.

The multi-directional projections provided by still further embodiments of the present invention can be readily understood by way of example of multi-directional projections corresponding to movement of the DMD in a two-dimensional plane in a multi-directional projection apparatus provided by some embodiments of the present invention described above. The effect of multi-directional projection corresponding to the movement and/or torsion of the DMD in the three-dimensional space of the field of view of the lens assembly in the projection device.

As can be seen from the above description, in the multi-directional projection apparatus provided in the embodiment of the present invention, the DMD is mounted on the movable mechanical component, and the DMD disposed on the movable mechanical component is driven by controlling the movable mechanical component where the DMD is located. Performing movement and/or twisting, so that the DMD can project in the direction of the target imaging area, and the projected image is imaged onto the target imaging area of the screen through the lens assembly, thereby overcoming the defect of single projection direction in the prior art, by the present invention According to the technical solution provided by the embodiment, the DMD can flexibly project the direction to different target imaging regions under the driving of the movable mechanical component, thereby achieving the effect of multi-directional projection, and the projection of the DMD into different directions is correspondingly imaged. Different areas of the screen further enrich the visual effects that can be achieved by projection. At the same time, since the DMD can move and/or twist in the space of the lens assembly's field of view, it also improves the utilization of the field of view, and realizes the full utilization of the optical aperture of the lens assembly.

Based on the same technical concept, the embodiment of the present invention further provides a multi-directional projection method, which can be implemented by the above device embodiment, or can be applied to a multi-directional projection device including a lens assembly, a DMD, and a control system. Among them, the DMD in the multi-directional projection device is mounted on the movable mechanical component.

The multi-directional projection method includes:

Controlling the movable mechanical component in which the DMD is located to drive the DMD disposed on the movable mechanical component to move and/or twist to project the DMD toward the target imaging region, and the projected image is imaged to the screen through the lens assembly On the target imaging area.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the movable mechanical component that controls the DMD drives the DMD disposed on the movable mechanical component to move and/or twist, and may include the following process:

Obtaining orientation information of the target imaging area;

Determining, according to the orientation information of the target imaging region, a target position in which the DMD projects in a direction of the target imaging region within a field of view of the lens assembly;

Calculating an angle of displacement and/or twist to be moved by the DMD from the current position to the target position;

The movable mechanical component in which the DMD is located is controlled to drive the DMD disposed on the movable mechanical component to move and/or twist according to the calculated displacement and/or torsion angle of the DMD to be moved to the target position.

Optionally, in the multi-screen projection method provided by still another embodiment of the present invention, the movable mechanical component that controls the DMD drives the DMD disposed on the movable mechanical component to move and/or twist, and may include The following process:

Obtaining a motion trajectory of the preset DMD within a field of view of the lens component, where the motion trajectory of the preset DMD corresponds to a preset target imaging area;

According to the obtained movement trajectory of the DMD, the movable mechanical component where the DMD is controlled drives the DMD disposed on the movable mechanical component to move and/or twist.

Optionally, in the multi-screen projection method provided by some embodiments of the present invention, the multi-directional projection device may further include: a mirror assembly disposed between the DMD and the illumination system;

The multi-screen projection method provided by some embodiments of the present invention further includes:

The angle of the mirror assembly is adjusted based on movement and/or torsion of the DMD such that the DMD is always within the illumination range of the illumination system.

For software implementations, these techniques can be implemented with modules (eg, programs, functions, etc.) that implement the functions described herein. The software code can be stored in a memory unit and executed by the processor. The memory unit can be implemented within the processor or external to the processor.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A multi-screen projection device, comprising: a signal processing system, a lens assembly, and a digital micromirror device DMD;

The signal processing system is configured to receive an N-channel image signal, where N is an integer greater than or equal to 2, and convert the N-channel image signal into a DMD driving signal corresponding to an N-block region on the DMD;

The DMD driving circuit is configured to drive a corresponding area on the DMD to perform projection according to the received DMD driving signal.
The multi-screen projection apparatus according to claim 1, wherein N blocks on said DMD are symmetrically arranged with respect to an optical axis of said lens assembly.
The multi-screen projection apparatus according to claim 1, wherein the signal processing system simultaneously outputs, to the DMD driving circuit, the N-block region obtained by converting the image to be projected corresponding to the N block regions on the DMD. DMD drive signal.
The multi-screen projection apparatus according to claim 1, wherein said signal processing system, according to preset time-shadow projection configuration information, to the DMD during a projection time period configured on an area on said DMD The driving circuit outputs a DMD driving signal corresponding to the corresponding image obtained by converting the image to be projected in the region, and otherwise, does not output the DMD driving signal corresponding to the region.
The multi-screen projection device of claim 1 further comprising:

a first control system, configured to output a control signal to the DMD driving circuit according to the preset time-sharing projection configuration information, where the control signal is used to control the DMD driving circuit to drive the DMD according to the DMD driving signal output by the signal processing system The projection is performed according to the preset time-sharing projection configuration information, and the DMD driving circuit is driven to drive the micromirrors of the region on the DMD that are not required to be projected according to the preset time-sharing projection configuration information to be turned off. status.
A multi-screen projection apparatus according to claim 1, wherein said signal processing system divides the number of micromirrors in the address range of the micromirrors on the DMD assigned to the respective image signals and the micromirrors in the address range The shapes are all set to be the same so that the sizes of the N blocks on the DMD are identical to each other; or

The number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and the shape formed by the micromirrors in the address range are set to be different so that the sizes of the N blocks on the DMD are not different from each other. the same.
The multi-screen projection apparatus according to claim 1, wherein said signal processing system determines an address range and/or a micromirror on the DMD allocated for each image signal according to the size of the DMD and the preset number of partitions. The shape formed by the micromirrors in this address range.
The multi-screen projection apparatus according to claim 1, wherein said signal processing system determines an address range of a micromirror on a DMD allocated for each image signal according to a size of the DMD and a number of image signals and/or the The shape of the micromirror within the address range.
A multi-screen projection apparatus according to claim 1, wherein said signal processing system

The address range of the micromirror on the DMD allocated for each image signal and/or the shape of the micromirror within the address range is determined according to the resolution of the image to be projected.
The multi-screen projection apparatus according to any one of claims 1 to 9, further comprising: a movable mechanical component; the DMD being disposed on the movable mechanical component, the multi-screen projection device further comprising:

a second control system, configured to control, according to the target imaging area of the N block area on the DMD, the movable mechanical component where the DMD is located to drive the DMD disposed on the movable mechanical component to move and/or twist, A projection of the N block regions on the DMD is imaged by the lens assembly onto the target imaging region of the screen.
A multi-screen projection method for a projection device including a DMD and a lens assembly, the method comprising:

Receiving an N-channel image signal, N being an integer greater than or equal to 2, converting the N-channel image signal into a DMD driving signal corresponding to the N-block region on the DMD;

The corresponding area on the DMD is driven to be projected according to the received DMD driving signal.
The multi-screen projection method according to claim 11, wherein the driving the corresponding area on the DMD to perform projection according to the received DMD driving signal comprises: converting the image to be projected corresponding to the N block area on the DMD Obtaining a DMD driving signal corresponding to the N blocks, Simultaneous output to the DMD driver circuit.
The multi-screen projection method according to claim 11, wherein the driving the corresponding area on the DMD according to the received DMD driving signal for projection comprises: according to a preset time-sharing projection configuration information, in the opposite The DMD driving signal corresponding to the corresponding region is output to the DMD driving circuit during the projection time period configured by the region on the DMD; otherwise, the DMD driving signal of the corresponding region is not output.
The multi-screen projection method according to claim 11, wherein the driving the corresponding area on the DMD according to the received DMD driving signal for projection comprises: driving the circuit to the DMD according to the preset time-sharing projection configuration information. And outputting a control signal, the control signal is used to control the DMD driving circuit to drive, according to the received DMD driving signal, the area on the DMD that needs to be projected according to the preset time-sharing projection configuration information, and control the driving of the DMD driving circuit The micromirrors of the area on the DMD that do not need to be projected according to the preset time-sharing projection configuration information are all deflected to the off state.
The multi-screen projection method according to claim 11, further comprising: constituting a number of micromirrors in an address range of the micromirror on the DMD allocated for each image signal and a micromirror in the address range The shapes are all set to be the same so that the N blocks on the DMD are the same size; or

The number of micromirrors in the address range of the micromirror on the DMD allocated for each image signal and the shape formed by the micromirrors in the address range are set to be different so that the sizes of the N blocks on the DMD are not different from each other. the same.
The multi-screen projection method according to claim 11, further comprising: determining an address range and/or an address of the micromirror on the DMD allocated for each image signal according to the size of the DMD and the preset number of partitions. The shape of the micromirrors in the range.
The multi-screen projection method according to claim 11, further comprising: determining an address range and/or an address range of the micromirror on the DMD allocated for each image signal according to the size of the DMD and the number of image signals The shape of the micromirror inside.
The multi-screen projection method according to claim 11, further comprising: The resolution of the projected image is determined as the address range of the micromirror on the DMD assigned to each image signal and/or the shape of the micromirror within the address range.
The multi-screen projection method according to any one of claims 11 to 18, further comprising:

Controlling, by the movable imaging component of the projection device, the movable mechanical component of the projection device to move and/or twist the DMD disposed on the movable mechanical component to cause N on the DMD according to a target imaging region of the N block region on the DMD A projection of the block area is imaged by the lens assembly onto the target imaging area of the screen.