Projection equipment and projection system

Abstract

The utility model provides projection equipment and a projection system, and relates to the technical field of projection, and the projection equipment comprises a housing which is provided with a light-transmitting through hole; the digital micromirror device is installed on the shell, and one side of the digital micromirror device is provided with a first area and a second area surrounding the first area; the first area and at least part of the second area are exposed through the hole opening of the light-transmitting through hole; the light-transmitting through hole is used for allowing light to pass through and be projected on the first area, and the first area is used for reflecting the light; the shading piece comprises a connecting part and a shading part which are connected with each other, and the connecting part is connected to the shell; an opening is formed in the connecting part, at least part of the shielding part is exposed through the opening, and the shielding part is used for absorbing light; in the projection direction of the light, the projection of the shielding part on the digital micromirror device covers at least part of the second area, and the first area is exposed through the opening. According to the projection equipment and the projection system, the imaging quality of the projection equipment and the working reliability of the DMD device can be improved.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a projection device and a projection system. Background Art

[0002] Projection equipment includes liquid crystal display projection equipment and digital light processing projection equipment, etc. Among them, the digital light processing projection equipment includes an optical engine, and the digital micromirror device (DMD) is the core component of the optical engine. The DMD includes a support plate and a digital micromirror chip stacked on the support plate.

[0003] When the optical engine is working, the light emitted by the light source is projected onto the DMD after passing through the optical lens, and the DMD converts the light into an image and projects it out by the lens; wherein, the DMD includes a first area and a second area surrounding the first area, and the first area is a display area. Under ideal conditions, all the light emitted by the light source is irradiated into the first area, and the first area can reflect the light and form an image.

[0004] However, due to factors such as processing errors and assembly errors, some light is directed to the second area, and the light directed to the second area forms stray light, which affects the quality of imaging and reduces the working reliability of the DMD device. Utility Model Content

[0005] In view of the above problems, the present application provides a projection device and a projection system, which can improve the imaging quality of the projection device and the working reliability of the DMD device.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A first aspect of the present application provides a projection device, comprising:

[0008] A shell body, wherein a light-transmitting through hole is provided on the shell body;

[0009] A digital micromirror device, the digital micromirror device is mounted on the housing, one side of the digital micromirror device has a first area and a second area surrounding the first area; the first area and at least a portion of the second area are exposed through an opening of a light-transmitting through hole; the light-transmitting through hole is used for allowing light to pass through and project onto the first area, and the first area is used for reflecting light;

[0010] The shading member comprises a connecting portion and a shielding portion connected to each other, wherein the connecting portion is connected to the housing; an opening is provided on the connecting portion, and at least a portion of the shielding portion is exposed through the opening, and the shielding portion is used to absorb light;

[0011] Along the projection direction of the light, the projection of the shielding portion on the digital micromirror device covers at least a portion of the second area, and the first area is exposed through the opening.

[0012] The beneficial effects of the present application are as follows: the shielding portion can shield the second area and absorb light, thereby preventing stray light from being formed after the light is directed to the second area, reducing the amount of stray light, improving the imaging quality of the projection device, and ensuring that the imaging light comes from the reflected light from the first area; in addition, after the shielding portion shields the second area and absorbs light, it can also prevent the second area from generating heat after absorbing the light, thereby improving the working reliability of the DMD device and the projection device, and extending the service life of the DMD device and the projection device.

[0013] In a possible implementation, one end of the shielding portion away from the connecting portion is an abutting end, and the abutting end abuts against at least a portion of the second area;

[0014] The abutting end protrudes from the surface of the connecting portion toward the direction approaching the shell.

[0015] In this way, the shielding part can play a role in heat conduction, and the heat of the digital micromirror device can be transferred to the shell through the shielding part and the connecting part in sequence, thereby improving the service life of the digital micromirror device and reducing the failure rate; and after the abutting end protrudes from the surface of the connecting part, it is convenient for the abutting end to abut the second area.

[0016] In a possible implementation, the first region and the second region are both located in the light-transmitting through hole; and at least a portion of the abutting end is located in the light-transmitting through hole and abuts against the second region.

[0017] In this way, the light-transmitting through hole can play a role of accommodation, making it easier for the abutting end to abut against the second area.

[0018] In a possible implementation, a plurality of shielding parts are provided, the plurality of shielding parts are connected to the edge of the opening and are arranged at intervals along the circumference of the opening, and all abut against the second area; and / or the shielding part is an elastic member.

[0019] In this way, the multiple shielding parts can conduct heat at the same time, further improving the heat dissipation and cooling efficiency of the digital micromirror device; the shielding parts can be elastically deformed when abutting against the second area, so that the shielding parts are closely abutted against the second area.

[0020] In a possible implementation, the projection device further includes a fixing member, the light shielding member is provided with a mounting hole, the fixing member is passed through the mounting hole and is connected to the housing;

[0021] The shading element is fixedly mounted on the housing through a fixing element.

[0022] In this way, the existence of the fixing member facilitates the shading member to be fixedly mounted on the housing.

[0023] In a possible implementation, the connection portion includes a connection body and a limiter, the limiter is connected to the edge area of ​​the connection body, the opening is arranged in the central area of ​​the connection body, and the edge area is arranged around the central area; the shell is provided with a plug hole penetrating the shell;

[0024] The limiting piece is elastic; the limiting piece passes through the insertion hole and abuts against one side of the shell, and the connecting body abuts against the other side of the shell, so that the shading piece is fixedly installed on the shell.

[0025] In this way, the connection part can be connected to the shell by the cooperation between the connection body and the limiting member; in addition, under the action of the elastic force of the limiting member, the shell can be clamped between the limiting member and the connection body.

[0026] In a possible implementation, at least one pair of limiting members is provided, and the pair of limiting members are symmetrically arranged on both sides of the connecting body.

[0027] In this way, after the limiting members are arranged in pairs, the connection reliability of the connecting portion on the housing can be improved, so that the shading member is not easy to fall off from the housing.

[0028] In a possible implementation, a plurality of positioning holes are provided on one of the connection portion and the shell, and a plurality of positioning posts are provided on the other of the connection portion and the shell; and the plurality of positioning posts are inserted into the positioning holes in a one-to-one correspondence.

[0029] In this way, the positioning and installation between the connecting part and the housing can be easily completed through the cooperation between the positioning column and the positioning hole.

[0030] A second aspect of the present application provides a projection device, comprising:

[0031] case;

[0032] A digital micromirror device is used to be mounted on a housing, wherein one side of the digital micromirror device has a first area and a second area surrounding the first area; an opening of a light-transmitting through hole on the housing is used to expose the first area and at least a portion of the second area; the light-transmitting through hole is used to allow light to pass through and project onto the first area, and the first area is used to reflect light;

[0033] A shading member, wherein the connecting portion of the shading member is used to be connected to the housing, the opening on the connecting portion is used to expose at least a portion of the shading portion on the shading member connected to the connecting portion, and the shading portion is used to absorb light;

[0034] Along the projection direction of the light, the projection of the shielding portion on the digital micromirror device is used to cover at least a portion of the second area, and the opening is used to expose the first area.

[0035] A third aspect of the present application provides a projection system, comprising a projection screen and a projection device in any of the above implementations, wherein the projection device is used to project a projection picture onto the projection screen.

[0036] In the projection device and projection system provided by the present application, when light is directed to the digital micromirror device, the light can be directed to the first area, and the shielding part can shield the second area and absorb the light, preventing the light from forming stray light after being directed to the second area, reducing the amount of stray light, improving the imaging quality of the projection device, and ensuring that the imaging light comes from the reflected light of the first area; in addition, after the shielding part shields and absorbs the light to the second area, it can also prevent the second area from generating heat after absorbing the light, improving the temperature uniformity of different parts of the DMD device, thereby improving the working reliability of the DMD device and the projection device, and extending the service life of the DMD device and the projection device. In addition, when the shielding part abuts against at least part of the second area, the shielding part can play a role in heat conduction, and the heat of the digital micromirror device can be transferred to the housing through the shielding part and the connecting part in sequence, thereby further improving the service life of the DMD device and reducing the failure rate.

[0037] The structure of the present application and its other inventive objectives and beneficial effects will be more clearly understood through the description of the specific implementation methods in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A front view of some components of the projection device provided in an embodiment of the present application;

[0040] Figure 2 for Figure 1 Exploded view after removing the fixings;

[0041] Figure 3 A top view of a digital micromirror device provided in an embodiment of the present application;

[0042] Figure 4 A top view of a shading member provided in an embodiment of the present application;

[0043] Figure 5 For Figure 1 A top view of some components of the corresponding projection equipment;

[0044] Figure 6 for Figure 5 Sectional view at AA in the middle;

[0045] Figure 7 for Figure 5The cross-sectional view at the middle BB is rotated 90 degrees to the right;

[0046] Figure 8 For Figure 2 Another corresponding exploded diagram;

[0047] Fig. 9 For Figure 4 Another corresponding top view;

[0048] Fig.10 For Figure 7 Another cross-sectional view corresponding to the same;

[0049] Fig.11 A scene diagram of the projection device provided in an embodiment of the present application when projecting onto a projection screen.

[0050] Description of reference numerals:

[0051] 100-housing; 110-light-transmitting through hole;

[0052] 120-jack; 130-positioning column;

[0053] 200-digital micromirror device; 210-first area;

[0054] 220-second area; 200A-digital micromirror chip;

[0055] 200B-support plate; 300-shading member;

[0056] 310-connecting part; 310A-connecting body;

[0057] 310B-limiting piece; 310C-operating end;

[0058] 311- opening; 312- positioning hole;

[0059] 313-mounting hole; 320-shielding portion;

[0060] 321-butting end; 400-fixing member;

[0061] 500-light; 600-lens;

[0062] 700-housing; 20-projection equipment;

[0063] 30-Projection screen. DETAILED DESCRIPTION

[0064] When the optical engine is working, the light emitted by the light source passes through a number of optical lenses and is projected onto the Digital Micromirror Device (DMD). The DMD device converts the light into an image and projects it out through the lens. Figure 2 and Figure 3 As shown, the digital micromirror device 200 includes a digital micromirror chip 200A and a support plate 200B, the digital micromirror chip 200A is mounted on the support plate 200B, and the side of the digital micromirror chip 200A away from the support plate has a first area 210 and a second area 220 surrounding the first area 210. In an ideal state, all the light emitted by the light source is irradiated in the first area 210, and the first area 210 can reflect the light and form an image of the light. However, due to the influence of factors such as processing errors and assembly errors, some light is emitted to the second area 220, and the light emitted to the second area 220 forms stray light, which affects the quality of imaging; in addition, the second area 220 will generate heat after absorbing the energy of the light, thereby affecting the working reliability of the DMD device.

[0065] Based on the above problems, the present application provides a projection device and a projection system, wherein the projection device includes a shell, a digital micromirror device and a shading member; wherein the digital micromirror device is mounted on the shell, and one side of the digital micromirror device has a first area and a second area surrounding the first area; the first area and at least part of the second area are both exposed through the opening of a light-transmitting through hole on the shell; the light-transmitting through hole is used for allowing light to pass through and project onto the first area, and the first area is used for reflecting light; in addition, the shading member includes a connecting portion and a shielding portion that are interconnected, and the connecting portion is connected to the shell; an opening is provided on the connecting portion, and at least part of the shielding portion is exposed through the opening, and the shielding portion is used to absorb light; and, along the projection direction of the light, the projection of the shielding portion on the digital micromirror device covers at least part of the second area, and the first area is exposed through the opening. Thus, when light is directed toward the digital micromirror device, the light can be directed toward the first area, while the shielding portion can shield the second area and absorb the light, thereby preventing the light from forming stray light after being directed toward the second area, reducing the amount of stray light, and improving the imaging quality of the projection device; in addition, after the shielding portion shields the second area and absorbs the light, it can also prevent the second area from generating heat after absorbing the light, thereby improving the working reliability of the DMD device and the projection device.

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0068] The following combination Figures 1 to 10 , the structure of the projection device provided in the embodiment of the present application is described in detail.

[0069] The projection device provided in the embodiment of the present application includes:

[0070] like Figures 1 to 7 As shown, the projection device provided by the present application includes:

[0071] The housing 100 is provided with a light-transmitting through hole 110 ; specifically, the light-transmitting through hole 110 penetrates the housing 100 along the thickness direction of the housing 100 .

[0072] The digital micromirror device 200 is mounted on the housing 100. Figure 2 and Figure 3 As shown, one side of the digital micromirror device 200 has a first area 210 and a second area 220 surrounding the first area 210; the first area 210 and at least a portion of the second area 220 are exposed through the opening of the light-transmitting through hole 110; the light-transmitting through hole 110 is used to allow light 500 to pass through and project onto the first area 210, and the first area 210 is used to reflect the light 500. Specifically, the digital micromirror device 200 includes a digital micromirror chip 200A and a support plate 200B, the digital micromirror chip 200A is mounted on the support plate 200B, and the side of the digital micromirror chip 200A away from the support plate 200B has a first area 210 and a second area 220; the second area 220 can be completely exposed through the opening of the light-transmitting through hole 110. When the light 500 is projected onto the first area 210, the first area 210 will reflect the light, and the reflected light 500 is as shown in FIG. Figure 6 and Figure 7 shown.

[0073] The shading member 300 includes a connecting portion 310 and a shielding portion 320 connected to each other. Figure 4 and Figure 5As shown, the connecting portion 310 is connected to the housing 100; the connecting portion 310 is provided with an opening 311, and at least a portion of the shielding portion 320 is exposed through the opening 311, and the shielding portion 320 is used to absorb the light 500; and along the projection direction of the light 500, the projection of the shielding portion 320 on the digital micromirror device 200 covers at least a portion of the second area 220, and the first area 210 is exposed through the opening 311. Thus, the shielding portion 320 can shield the second area 220 and absorb the light 500, so as to prevent the light 500 from being projected toward the second area 220 and forming stray light. Specifically, the projection of the shielding portion 320 on the digital micromirror device 200 covers a portion of the second area 220, or the projection of the shielding portion 320 on the digital micromirror device 200 covers the entire second area 220. After the first area 210 is exposed through the opening 311 , the light 500 can pass through the opening 311 and the light-transmitting hole 110 and be projected onto the first area 210 . The first area 210 can reflect the light 500 , and the reflected light 500 can be emitted through the opening 311 and the light-transmitting hole 110 .

[0074] Thus, in the projection device provided by the present application, when the light 500 is emitted toward the digital micromirror device 200, the light 500 can be emitted toward the first area 210, and the shielding portion 320 can shield the second area 220 and absorb the light 500, thereby preventing the light 500 from forming stray light after being emitted toward the second area 220, reducing the amount of stray light, improving the imaging quality of the projection device, and ensuring that the imaging light 500 comes from the reflected light 500 from the first area 210; in addition, after the shielding portion 320 shields the second area 220 and absorbs the light 500, it can also prevent the second area 220 from generating heat after absorbing the light 500, thereby improving the temperature uniformity of different locations of the DMD device, thereby improving the working reliability of the DMD device and the projection device, and extending the service life of the DMD device and the projection device.

[0075] For example, Figure 4 As shown, the opening 311 may expose the entire shielding portion 320, in which case the shielding portion 320 is connected to the edge of the opening 311, and along the extension direction of the opening 311, the projection of the shielding portion 320 on the connecting portion 310 is entirely located in the opening 311. Alternatively, the opening 311 may expose a portion of the shielding portion 320, in which case there is a gap between the connection between the shielding portion 320 and the connecting portion 310 and the edge of the opening 311, and along the extension direction of the opening 311, the projection of the shielding portion 320 on the connecting portion 310 is partially located in the opening 311.

[0076] It should be noted that after the first area 210 reflects the light 500, the energy of the light 500 will also be reflected; if the shielding portion 320 does not shield the second area 220, the second area 220 will generate heat after absorbing the light 500, thereby making the temperature of different parts of the DMD device uneven, affecting the reliability and service life of the DMD device. Figure 6 and Figure 7 As shown, there is an angle between the light 500 emitted toward the first area 210 and the light 500 reflected by the first area 210 .

[0077] In addition, the shading member 300 can be made of a material with high thermal conductivity, so that the shading member 300 absorbs the light 500 and heats up before transferring the heat to the shell 100; and the surface of the shading member 300 can be treated black to facilitate the absorption of the light 500 by the shielding part 320 to ensure imaging quality.

[0078] It should be noted that the first area 210 and the second area 220 are exposed through the opening of the light-transmitting through hole 110 , which means that along the extension direction of the light-transmitting through hole 110 , the projections of the first area 210 and the second area 220 on the housing are located in the light-transmitting through hole 110 .

[0079] In addition, the shading member 300 can be arranged between the DMD device and the TIR (Total Internal Reflection) prism. Since the shielding portion 320 can shield the second area 220 and absorb the light 500, the amount of stray light is reduced, so there is no need to perform too much debugging to reduce stray light, which helps to improve production line efficiency and reduce manufacturing difficulty. In addition, a support platform and a positioning surface can be provided on the side of the housing 100 away from the shading member 300. The support platform is used for the DMD device to support, and the positioning surface is used to limit the position of the DMD device, thereby ensuring the stability and position accuracy of the installation of the DMD device.

[0080] In the embodiments of the present application, Figures 5 to 7 As shown, one end of the shielding portion 320 away from the connecting portion 310 is the abutting end 321, and the abutting end 321 abuts against at least a portion of the second area 220; with such a configuration, after the shielding portion 320 abuts against the second area 220, it is convenient to shield the second area 220, and at the same time, the shielding portion 320 can also play a role in heat conduction, and the heat of the digital micromirror device 200 can be transferred to the shell 100 through the shielding portion 320 and the connecting portion 310 in turn, which is convenient for heat dissipation and cooling of the digital micromirror device 200, thereby increasing the service life of the digital micromirror device 200 and reducing the failure rate.

[0081] In addition, if Figure 6 and Figure 7As shown, the abutting end 321 protrudes from the surface of the connecting portion 310 in the direction close to the housing 100. After the abutting end 321 protrudes from the surface of the connecting portion 310, it is convenient for the abutting end 321 to abut the second area 220. Specifically, the shielding portion 320 is a bent part, and after the shielding portion 320 is connected to the connecting portion 310, a step surface and a cantilever structure can be formed. Specifically, the connecting portion 310 and the shielding portion 320 are both plates.

[0082] Specifically, Figure 6 and Figure 7 As shown, the first region 210 and the second region 220 are both located in the light-transmitting through hole 110; at least part of the abutting end 321 is located in the light-transmitting through hole 110 and abuts the second region 220. With such a configuration, the light-transmitting through hole 110 can play a role of accommodation, so that the abutting end 321 can abut the second region 220. In addition, the abutting end 321 can be completely located in the light-transmitting through hole 110, and the abutting end 321 has an abutting surface on the side facing the digital micromirror device 200, and the abutting surface is in contact with the second region 220.

[0083] For example, Figure 4 and Figure 5 As shown, there are multiple shielding parts 320, and the multiple shielding parts 320 are connected to the edge of the opening 311 and are arranged at intervals along the circumference of the opening 311, and all abut against the second area 220; thus, after the multiple shielding parts 320 abut against the second area 220, the shielding range of the second area 220 can be improved, further ensuring the imaging quality and the working reliability of the DMD device; in addition, the multiple shielding parts 320 can conduct heat at the same time, further improving the heat dissipation and cooling efficiency of the DMD device. Specifically, as Figure 4 and Figure 5 As shown, the opening 311 is a rectangular opening, and four shielding portions 320 are provided. The four shielding portions 320 are simultaneously attached to the second area 220 of the DMD device, thereby transferring the heat of the digital micromirror device 200 to the shell 100 for heat dissipation; in addition, an additional heat dissipation structure can be designed on the shell 100 to ensure that the temperature of the shell 100 is at a lower value, thereby further improving the service life of the digital micromirror device 200 and reducing the failure rate.

[0084] Exemplarily, the shielding portion 320 is an elastic member. In this way, when the shielding portion 320 abuts against the second area 220, the shielding portion 320 can be elastically deformed so that the shielding portion 320 closely abuts against the second area 220; specifically, when the shielding portion 320 is an elastic member, it can ensure that the bottom plane of the shielding portion 320 is closely fitted with the second area 220. In addition, if Fig. 9 As shown, along the extending direction of the shielding portion 320 , both ends of the shielding portion 320 are disconnected from the connecting portion 310 to enhance the elasticity of the shielding portion 320 .

[0085] In a specific embodiment, Figure 1 and Figure 2 As shown, the projection device further includes a fixing member 400, and a mounting hole 313 is provided on the shading member 300. The fixing member 400 is inserted into the mounting hole 313 and connected to the housing 100; the shading member 300 is fixedly mounted on the housing 100 through the fixing member 400. In this arrangement, the fixing member 400 facilitates the shading member 300 to be fixedly mounted on the housing 100. Specifically, the fixing member 400 can be a screw, one end of which abuts against the shading member 300, and the other end is connected to the housing 100. In addition, the mounting hole 313 can be provided on the connecting portion 310.

[0086] In another specific embodiment, Figures 8 to 10 As shown, the connection part 310 includes a connection body 310A and a stopper 310B, the stopper 310B is connected to the edge area of ​​the connection body 310A, the opening 311 is arranged in the central area of ​​the connection body 310A, and the edge area is arranged around the central area. In addition, the housing 100 is provided with a plug hole 120 that penetrates the housing 100; the stopper 310B is elastic; the stopper 310B passes through the plug hole 120 and abuts against one side of the housing 100, and the connection body 310A abuts against the other side of the housing 100, so that the shading member 300 is fixedly installed on the housing 100. Therefore, when the connection part 310 is installed, it is only necessary to pass the stopper 310B through the plug hole 120 and abut against one side of the housing 100, and make the connection body 310A abut against the other side of the housing 100, so that the installation of the connection part 310 can be completed, at this time, the shading member 300 can be fixedly installed on the housing 100, and the shading part can block the second area 220. With such arrangement, the connection part 310 can be connected to the shell 100 by the cooperation between the connecting body 310A and the limiting member 310B. In addition, when the limiting member 310B is elastic, the limiting member 310B can be deformed to pass through the insertion hole 120. Under the action of the elastic force of the limiting member 310B, the shell 100 can be clamped between the limiting member 310B and the connecting body 310A.

[0087] Specifically, Fig. 9 and Fig.10As shown, at least one pair of limit members 310B is provided, and the pair of limit members 310B is symmetrically arranged on both sides of the connecting body 310A. In this way, after the limit members 310B are arranged in pairs, the connection reliability of the connecting portion 310 on the housing 100 can be improved, so that the shading member 300 is not easy to fall off from the housing 100. Specifically, the limit member 310B can be a cantilever, and the end of the limit member 310B away from the connecting body 310A is the operating end 310C, and the operating end 310C can extend out of the socket 120 and abut against one side of the housing 100; the user can operate the two operating ends 310C on the pair of limit members 310B, so that the two operating ends 310C are close to each other, so as to facilitate the limit member 310B to be inserted into the socket 120 and complete the installation of the shading member 300, or to facilitate the limit member 310B to be separated from the socket 120 and complete the disassembly of the shading member 300.

[0088] In the embodiments of the present application, Figure 1 and Figure 2 As shown, one of the connection part 310 and the housing 100 is provided with a plurality of positioning holes 312, and the other of the connection part 310 and the housing 100 is provided with a plurality of positioning posts 130; the plurality of positioning posts 130 are inserted into the positioning holes 312 one by one. In this way, the positioning posts 130 and the positioning holes 312 cooperate with each other, so as to facilitate the positioning and installation between the connection part 310 and the housing 100. Exemplarily, the connection part 310 is provided with a plurality of positioning holes 312, and the housing 100 is provided with a plurality of positioning posts 130.

[0089] In addition, the second aspect of the present application provides a projection device, comprising: a housing 100; a digital micromirror device 200, which is used to be installed on the housing 100, and one side of the digital micromirror device 200 has a first area 210 and a second area 220 surrounding the first area 210; the opening of the light-transmitting through hole 110 on the housing 100 is used to expose the first area 210 and at least a part of the second area 220; the light-transmitting through hole 110 is used to allow light 500 to pass through and be projected on the first area 210, and the first area 210 For reflecting the light 500; the light shielding member 300, the connecting portion 310 of the light shielding member 300 is used to be connected to the housing 100, the opening 311 on the connecting portion 310 is used to expose at least part of the shielding portion 320 on the light shielding member 300 connected to the connecting portion 310, and the shielding portion 320 is used to absorb the light 500; along the projection direction of the light 500, the projection of the shielding portion 320 on the digital micromirror device 200 is used to cover at least part of the second area 220, and the opening 311 is used to expose the first area 210. Therefore, when the light 500 is emitted to the digital micromirror device 200, the shielding portion 320 can shield the second area 220, prevent the light 500 from generating stray light after being emitted to the second area 220, and improve the imaging quality of the projection device; in addition, after the shielding portion 320 shields the second area 220, it can also prevent the second area 220 from heating up after absorbing the energy of the light 500, thereby improving the working reliability of the DMD device and the projection device.

[0090] Based on the above embodiments, the present application also provides a projection system, such as Fig.11 As shown, the projection system includes a projection screen 30 and a projection device 20 in any of the above implementations, and the projection device 20 is used to project a projection picture onto the projection screen 30. Specifically, the projection device 20 has a housing 700, and the housing 700 has a receiving cavity inside, and the housing 100, the digital micromirror device 200, and the light shielding member 300 are all located in the receiving cavity; in addition, the projection device 20 also has a lens 600, and the lens 600 is located in the receiving cavity. A light-transmitting window is provided on the housing 700, and the lens 600 is exposed in the light-transmitting window; thus, the light emitted by the first area 210 on the digital micromirror device 200 can finally be projected onto the projection screen 30 through the lens 600.

[0091] Based on the above embodiments, the present application further provides a projection system, including a projection screen and a projection device in any of the above embodiments, the projection device is used to project a projection image onto the projection screen. The specific structure, working principle and function of the projection device have been described in detail in the above embodiment 1, and will not be repeated here.

[0092] In the description of the present application, it should be understood that, in addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclude inclusion. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0094] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A projection device, It is characterized in that include: A housing, wherein the housing is provided with a light-transmitting through hole; A digital micromirror device, the digital micromirror device is mounted on the housing, one side of the digital micromirror device has a first area and a second area surrounding the first area; the first area and at least a portion of the second area are exposed through the opening of the light-transmitting through hole; the light-transmitting through hole is used for allowing light to pass through and project onto the first area, and the first area is used for reflecting the light; The light shielding member comprises a connecting portion and a shielding portion connected to each other, wherein the connecting portion is connected to the housing; an opening is provided on the connecting portion, and at least a portion of the shielding portion is exposed through the opening, and the shielding portion is used to absorb the light; Along the projection direction of the light, the projection of the shielding portion on the digital micromirror device covers at least a portion of the second area, and the first area is exposed through the opening.

2. The projection device according to claim 1, It is characterized in that One end of the shielding portion away from the connecting portion is a contact end, and the contact end contacts at least a portion of the second area; The abutting end protrudes from the surface of the connecting portion toward the direction approaching the shell.

3. The projection device according to claim 2, It is characterized in that The first region and the second region are both located in the light-transmitting through hole; at least a portion of the abutting end is located in the light-transmitting through hole and abuts against the second region.

4. The projection device according to claim 2, It is characterized in that The shielding parts are provided in plurality, and the plurality of shielding parts are connected to the edge of the opening and are arranged at intervals along the circumference of the opening, and are all in contact with the second area; And / or, the shielding portion is an elastic member.

5. The projection device according to any one of claims 1 to 4, It is characterized in that It also includes a fixing member, the light shielding member is provided with a mounting hole, the fixing member is passed through the mounting hole and connected to the housing; The shading member is fixedly mounted on the housing through the fixing member.

6. The projection device according to any one of claims 1 to 4, It is characterized in that The connecting part includes a connecting body and a limiting member, wherein the limiting member is connected to the edge area of ​​the connecting body, the opening is arranged in the central area of ​​the connecting body, and the edge area is arranged around the central area; the shell is provided with a plug hole penetrating the shell; The limiting member is elastic; the limiting member passes through the insertion hole and abuts against one side of the shell, and the connecting body abuts against the other side of the shell, so that the shading member is fixedly mounted on the shell.

7. The projection device according to claim 6, It is characterized in that At least one pair of the limiting members is provided, and the pair of limiting members are symmetrically arranged on both sides of the connecting body.

8. The projection device according to any one of claims 1 to 4, It is characterized in that One of the connecting portion and the shell is provided with a plurality of positioning holes, and the other of the connecting portion and the shell is provided with a plurality of positioning posts; A plurality of positioning posts are inserted into the positioning holes in a one-to-one correspondence.

9. A projection device, It is characterized in that include: case; A digital micromirror device, which is used to be mounted on the housing, wherein one side of the digital micromirror device has a first area and a second area surrounding the first area; the opening of the light-transmitting through hole on the housing is used to expose the first area and at least a part of the second area; the light-transmitting through hole is used to allow light to pass through and project onto the first area, and the first area is used to reflect the light; A shading member, wherein the connecting portion of the shading member is used to be connected to the housing, the opening on the connecting portion is used to expose at least a portion of the shading portion on the shading member connected to the connecting portion, and the shading portion is used to absorb the light; Along the projection direction of the light, the projection of the shielding portion on the digital micromirror device is used to cover at least a portion of the second area, and the opening is used to expose the first area.

10. A projection system, It is characterized in that It comprises a projection screen and the projection device according to any one of claims 1 to 9, wherein the projection device is used to project a projection picture onto the projection screen.

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