Projection device

Abstract

The projection device includes the following features. The lighting system is arranged in the shell and used for providing a lighting beam. The electric connecting piece is arranged in the shell. The light valve system comprises a dustproof module and a light valve module. The dustproof module comprises a frame and two light-transmitting plates. Two opposite ends of the frame are respectively provided with two light-transmitting plates, and the frame and the two light-transmitting plates form an accommodating space. The light valve module comprises a light valve and an electric connecting part. The light valve is arranged in the containing space. The light valve and the two light-transmitting plates are located on a transmission path of the illumination light beam, and the light valve is used for converting the illumination light beam into an image light beam. The electric connection part penetrates through the through hole of the frame, and one end of the electric connection part in the accommodating space is electrically connected with the light valve. The other end, located outside the containing space, of the electric connecting part is detachably and electrically connected to the electric connecting piece. The projection lens is arranged on a transmission path of the image light beam. The projection device provided by the invention maintains the dustproof effect and improves the heat dissipation efficiency, and also has the advantage of low cost.

Description

Technical Field

[0001] The present invention relates to an imaging device, and more particularly to a projection device. Background Art

[0002] The imaging method of a projection device is to project light onto a screen, thereby forming an image on the screen. Therefore, compared with a display that directly emits light towards the user to form an image, the projection device is more suitable for use in a dimly lit environment, such as a cinema. In addition, the projection device generally occupies less space than the above-mentioned display, and the screen for the projection device to project an image is easier to store than the above-mentioned display. Therefore, the projection device is also widely used in office or meeting scenarios.

[0003] Generally, most of the space inside the projection device is designed as a sealed space to accommodate a large number of optical components, thereby preventing the optical components from being contaminated by dust. However, due to the overly large volume of the above-mentioned sealed space, this not only limits the heat dissipation mechanism of the projection device but also increases the assembly and maintenance costs of the projection device.

[0004] The "Background Art" paragraph is only used to help understand the content of the present invention. Therefore, the content disclosed in the "Background Art" paragraph may include some known technologies that are not known to those skilled in the art of the relevant technical field. The content disclosed in the "Background Art" paragraph does not represent that the content or the problems to be solved by one or more embodiments of the present invention were known or recognized by those skilled in the art before the filing of the present invention application. Summary of the Invention

[0005] The present invention provides a projection device to maintain the dust-proof effect, improve the heat dissipation efficiency, and also has the advantage of low cost.

[0006] Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0007] To achieve one or some or all of the above purposes or other purposes, a projection device according to an embodiment of the present invention includes a housing, an illumination system, an electrical connector, a light valve system, and a projection lens. The illumination system is disposed in the housing and is configured to provide an illumination beam. The electrical connector is disposed in the housing. The light valve system includes a dust-proof module and a light valve module. The dust-proof module includes a frame and two light-transmitting plates. The two light-transmitting plates are respectively disposed at two opposite ends of the frame, and the frame and the two light-transmitting plates form a receiving space. The light valve module includes a light valve and an electrical connection portion. The light valve is disposed in the receiving space. The light valve and the two light-transmitting plates are located on the transmission path of the illumination beam, and the light valve is configured to convert the illumination beam into an image beam. The electrical connection portion passes through a through hole of the frame, and one end of the electrical connection portion located in the receiving space is electrically connected to the light valve. The other end of the electrical connection portion located outside the receiving space is detachably electrically connected to the electrical connector. The projection lens is disposed on the transmission path of the image beam.

[0008] In an embodiment of the present invention, the above light valve system further includes, for example, a dust-proof member. The frame has at least one heat dissipation hole, and the dust-proof member is disposed on the frame and covers the heat dissipation hole.

[0009] In an embodiment of the present invention, the above light valve system may further include two sealing members. One of the two sealing members is disposed between the edge of one of the two light-transmitting plates and the frame, and the other of the two sealing members is disposed between the edge of the other of the two light-transmitting plates and the frame.

[0010] In an embodiment of the present invention, the above light valve system further includes, for example, a dust barrier member, and the dust barrier member is disposed between the electrical connection portion and the through hole.

[0011] In an embodiment of the present invention, the above electrical connector may include a card-edge connector. The other end of the electrical connection portion located outside the receiving space may include a gold finger detachably electrically connected to the card-edge connector.

[0012] In an embodiment of the present invention, the above projection device may further include a fan, and the fan is disposed in the housing. The light valve system further includes, for example, a wind guiding member. The frame further has at least one air inlet. The wind guiding member is disposed on a side of the frame facing away from the light valve module, and the wind guiding member is adjacent to the air inlet, and the fan is configured to generate an air flow passing through the wind guiding member and the air inlet.

[0013] In an embodiment of the present invention, the above light valve system may further include a dust-proof member, and the dust-proof member is disposed on the frame and covers the air inlet.

[0014] In an embodiment of the present invention, the above wind guiding member and the electrical connection portion may be respectively located on opposite sides of the frame.

[0015] In an embodiment of the present invention, the above-mentioned air guiding member includes, for example, a windbreak wall. The windbreak wall is used to guide the airflow generated by the fan to the air inlet, and the windbreak wall shields the air inlet in the direction of the orthographic projection of the air inlet.

[0016] In an embodiment of the present invention, the above-mentioned housing may have a mounting opening, and the light valve system is detachably fixed to the electrical connector through the mounting opening.

[0017] In an embodiment of the present invention, the above-mentioned housing may include a cover body, and the cover body is used to shield or expose the mounting opening.

[0018] The projection device of the present invention adopts a light valve system with a dust-proof module, wherein the light valve is arranged in the accommodating space of the dust-proof module. In this way, the projection device of the present invention can not only maintain the dust-proof effect on the light valve, but also make other optical elements in the housing easier to dissipate heat, and can more flexibly design the heat dissipation mechanism in the projection device, thereby improving the heat dissipation efficiency of the projection device. In addition, since the light valve system can be detached from the housing separately, it is easy to assemble, repair or replace, thereby improving the service life of the projection device and reducing the cost of the projection device.

[0019] To make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0020] Figure 1 is a cross-sectional schematic view of a projection device according to an embodiment of the present invention.

[0021] Figure 2 is Figure 1 a three-dimensional schematic view of the light valve system of

[0022] Figure 3 is Figure 2 a cross-sectional schematic view of the light valve system of

[0023] Figure 4 is a partial cross-sectional schematic view of a projection device according to another embodiment of the present invention.

[0024] Figure 5 is a cross-sectional schematic view of the light valve system of a projection device according to another embodiment of the present invention.

[0025] Figure 6 is a cross-sectional schematic view of a projection device according to another embodiment of the present invention.

[0026] Description of the Reference Numerals:

[0027] 100, 100a, 100b: Projection device

[0028] 110, 110b: Housing

[0029] 111: Cover

[0030] 120: Lighting system

[0031] 130: Electrical connector

[0032] 140, 140b: Light valve system

[0033] 141: Dust-proof module

[0034] 142: Light valve module

[0035] 145: Air guide

[0036] 150: Projection lens

[0037] 160: Dust-proof part

[0038] 170: Dust barrier

[0039] 180: Dust-proof part

[0040] 1410: Frame

[0041] 1411, 1412: Light-transmitting plate

[0042] 1420: Light valve

[0043] 1421: Electrical connection part

[0044] A: Accommodation space

[0045] C: Airflow

[0046] CM: Heat dissipation module

[0047] D: Orthogonal projection direction

[0048] E1, E2: End

[0049] F1, F2: Fan

[0050] H1: Through hole

[0051] H2: Heat dissipation hole

[0052] L1: Lighting beam

[0053] L2: Image beam

[0054] M: Mirror

[0055] N1, N2: Lens

[0056] O: Mounting port

[0057] P: Reflective polarizer

[0058] R: Integrating column

[0059] T: Orbit

[0060] V: Air inlet

[0061] V1, V2: Ventilation holes

[0062] W: Windbreak wall. Detailed implementation manners

[0063] Regarding the foregoing and other technical contents, features and effects of the present invention, they will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only with reference to the directions of the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present invention.

[0064] Figure 1 It is a cross-sectional schematic view of a projection device according to an embodiment of the present invention. Figure 2 is Figure 1 a three-dimensional schematic view of the light valve system of Figure 3 is Figure 2 a cross-sectional schematic view of the light valve system of along the cutting line A1 - A1. Please first refer to Figure 1 and Figure 3 , the projection device 100 includes a housing 110, an illumination system 120, an electrical connector 130, a light valve system 140, and a projection lens 150. The illumination system 120 is disposed in the housing 110 and is used to provide an illumination beam L1. The electrical connector 130 is disposed in the housing 110. The light valve system 140 includes a dust-proof module 141 and a light valve module 142. The dust-proof module 141 includes a frame 1410, a light-transmitting plate 1411 (also shown in Figure 3 ) and 1412. The light-transmitting plates 1411 and 1412 are respectively disposed at two opposite ends of the frame 1410, and the frame 1410, the light-transmitting plate 1411, and 1412 form an accommodation space A. The light valve module 142 includes a light valve 1420 and an electrical connection part 1421. The light valve 1420 is disposed in the accommodation space A. The light valve 1420, the light-transmitting plate 1411, and 1412 are located on the transmission path of the illumination beam L1, and the light valve 1420 is used to convert the illumination beam L1 into an image beam L2. The electrical connection part 1421 passes through the through hole H1 of the frame 1410, and one end E1 of the electrical connection part 1421 located in the accommodation space A is electrically connected to the light valve 1420. The other end E2 of the electrical connection part 1421 located outside the accommodation space A (also shown in Figure 2 ) is detachably electrically connected to the electrical connector 130. The projection lens 150 is disposed on the transmission path of the image beam L2.

[0065] The light valve system 140 can receive power through the electrical connector 130 and can also be detached from the electrical connector 130. In other words, the light valve system 140 can be taken out separately from within the housing 110, thus having the advantages of being easy to assemble, repair, or replace. In this embodiment, the light valve 1420 includes, for example, a liquid crystal panel, and the liquid crystal panel can receive power through the electrical connection portion 1421 and the electrical connector 130 that are electrically connected to each other. Additionally, the dust-proof module 141 can allow the illumination beam L1 to be incident on the light valve 1420 and can also isolate dust from entering the accommodation space A, thereby preventing the light valve 1420 from being contaminated by dust. Specifically, the light valve 1420 can be disposed between the light-transmitting plates 1411 and 1412, where the light-transmitting plate 1411 is located on the transmission path of the illumination beam L1 to allow the illumination beam L1 to pass through and be incident on the light valve 1420. On the other hand, after the light valve 1420 converts the illumination beam L1 into the image beam L2, the image beam L2 can exit from the dust-proof module 141 through the light-transmitting plate 1412. In this embodiment, the light-transmitting plates 1411 and 1412 are, for example, both in a flat plate shape. In addition, the materials of the light-transmitting plates 1411 and 1412 can include glass, but the present invention is not limited thereto.

[0066] Please refer to Figure 2 and Figure 3 , the light valve system 140 of this embodiment also includes, for example, a dust-proof member 160 (also shown in Figure 1 ). The frame 1410 can have at least one heat dissipation hole H2, and in this embodiment, a plurality of heat dissipation holes H2 are exemplified. The dust-proof member 160 is disposed on the frame 1410 and covers the heat dissipation hole H2. Therefore, air flow can enter and exit the dust-proof module 141 through the heat dissipation hole H2, and the dust-proof member 160 can maintain the dust-proof effect of the dust-proof module 141 on the light valve 1420, thereby improving the heat dissipation efficiency of the light valve 1420. In this embodiment, the dust-proof member 160 can be disposed within the heat dissipation hole H2, but other embodiments are not limited thereto. For example, in one embodiment, the dust-proof member 160 can be disposed on the inner or outer side surface of the frame 1410 and cover the heat dissipation hole H2. The dust-proof member 160 of this embodiment includes, for example, a filter, so that the aforementioned air flow can more easily enter and exit the dust-proof module 141 through the heat dissipation hole H2, thereby further improving the heat dissipation efficiency of the light valve 1420. Incidentally, the heat dissipation hole H2 can be located on at least one side of the frame 1410, and in this embodiment, the heat dissipation hole H2 is exemplified as being located on three sides of the frame 1410, but other embodiments are not limited thereto. Additionally, the present invention does not impose many restrictions on the shape and number of the heat dissipation holes H2.

[0067] Please refer to again Figure 1 and Figure 3, in this embodiment, the light valve system 140 further includes, for example, a dust barrier 170 disposed between the electrical connection portion 1421 and the through hole H1. In other words, the dust barrier 170 can be sealed between the frame 1410 and the electrical connection portion 1421 and cover the through hole H1 to prevent dust from entering the dust-proof module 141 through the through hole H1. The dust barrier 170 is, for example, fixed within the through hole H1, and the end E2 of the electrical connection portion 1421 can extend out of the through hole H1. Similarly, in one embodiment, the dust barrier 170 can be fixed to the inner or outer side surface of the frame 1410. Likewise, the dust barrier 170 of this embodiment can include a filter screen to make it easier for air to flow in and out of the dust-proof module 141 through the through hole H1. It can be understood that the present invention does not impose many restrictions on the shape of the through hole H1.

[0068] Please continue to refer to Figure 1 , in this embodiment, the electrical connector 130 can be fixed to a mechanism member within the housing 110. The electrical connector 130 can include a card edge connector. The end E2 of the electrical connection portion 1421 located outside the accommodation space A, for example, includes a gold finger detachably electrically connected to the aforementioned card edge connector. Further, the gold finger is electrically connected to the light valve 1420, and when the gold finger is inserted into the card edge connector, the light valve 1420 is electrically connected to the card edge connector.

[0069] The housing 110 can have an installation opening O, and the light valve system 140 is detachably fixed to the electrical connector 130 through the installation opening O. Thus, the light valve system 140 can be inserted into or taken out of the housing 110 through the installation opening O, making it easier to assemble and disassemble. Further, the housing 110 can include a cover 111. The cover 111 is used to shield or expose the installation opening O to enhance the dust-proof function of the housing 110. For example, the cover 111 can include a pivoting cover, and in one embodiment, the cover 111 can include a sliding cover. In another embodiment, the housing 110 may not be provided with the installation opening O and the cover 111, and the light valve system 140 can be taken out by disassembling the housing 110.

[0070] Figure 4 is a partial cross-sectional schematic diagram of a projection device according to another embodiment of the present invention. Please refer to Figure 4 , incidentally, in one embodiment, a track T corresponding to the installation opening O can be provided within the housing 110. The light valve system 140 can be placed on the track T through the installation opening O and move along the track T until the electrical connection portion 1421 is fixed to and electrically connected to the electrical connector 130. Thus, the light valve system 140 can be installed within the housing 110. Conversely, taking the light valve system 140 out of the installation opening O along the track T can disassemble the light valve system 140 from the housing 110.

[0071] Please refer to againFigure 1 , in this embodiment, the lighting system 120 includes, for example, light emitting diodes (LEDs), and the light emitting diodes can generate an illumination beam L1. Specifically, the number of the light emitting diodes can be one or more. For example, when the number of the light emitting diodes is multiple, the light emitting diodes can be arranged in a matrix. In one embodiment, the lighting system 120 can include a laser diode (LD), and the aforementioned laser diode generates the illumination beam L1.

[0072] The projection lens 150 of this embodiment can be sleeved on the housing 110. The projection lens 150 includes, for example, one or more optical lenses, and the diopters of the above-mentioned optical lenses can be the same as or different from each other. For example, the above-mentioned optical lenses can include various non-planar lenses such as double concave lenses, double convex lenses, convex-concave lenses, concave-convex lenses, plano-convex lenses, and plano-concave lenses, or any combination of the above non-planar lenses. In one embodiment, the projection lens 150 can also include a planar optical lens, and the present invention does not limit the specific structure of the projection lens 150.

[0073] Compared with the prior art, the projection device 100 of this embodiment adopts a light valve system 140 with a dust-proof module 141, and the light valve 1420 is disposed in the accommodation space A of the dust-proof module 141. Thus, the projection device 100 of this embodiment can not only maintain the dust-proof effect on the light valve 1420, but also make other optical elements in the housing 110 easier to dissipate heat, and can more flexibly design the heat dissipation mechanism in the projection device, thereby improving the heat dissipation efficiency of the projection device 100. In addition, since the light valve system 140 can be separately disassembled from the housing 110, it is easy to assemble, repair or replace, thereby improving the service life of the projection device 100 and reducing the cost of the projection device 100.

[0074] Incidentally, an integrating column R, a reflective polarizer P, a mirror M, and lenses N1 and N2 can also be provided in the housing 110. Specifically, the integrating column R can be disposed on the transmission path of the illumination beam L1, and the lenses N1 and the reflective polarizer P can be disposed between the integrating column R and the light valve system 140, and can allow the illumination beam L1 to pass through and enter the light valve system 140. On the other hand, the lens N2 is disposed on the transmission path of the image beam L2, and the mirror M can reflect the image beam L2 emitted from the lens N2 to the projection lens 150. In this embodiment, the lenses N1 and N2 include, for example, Fresnel lenses, but the present invention is not limited thereto. It can be understood that Figure 1 The structures and positions of the optical elements such as the integrating column R, the reflective polarizer P, the mirror M, and the lenses N1 and N2 shown are only examples, and are not used to limit the present invention.

[0075] Figure 5 is a cross-sectional schematic view of the light valve system of a projection device according to another embodiment of the present invention. The structure and advantages of the projection device 100a in this embodiment are similar to those of Figure 1 the embodiment, and only the differences will be described below. Please refer to Figure 5 , the light valve system 140a may further include seals 143 and 144. The seal 143 is disposed between the edge R1 of the light transmissive plate 1411 and the frame 1410, and the seal 144 is disposed between the edge R2 of the light transmissive plate 1412 and the frame 1410. Therefore, the seal 143 can seal the gap G1 between the light transmissive plate 1411 and the frame 1410, and the seal 144 can seal the gap G2 between the light transmissive plate 1412 and the frame 1410, thereby further enhancing the dustproof effect on the light valve 1420. Incidentally, the light transmissive plate 1411 can be detachably fixed to the frame 1410 via the seal 143, and the light transmissive plate 1412 can also be detachably fixed to the frame 1410 via the seal 144. Thus, the light transmissive plates 1411 and 1412 can be detached from and replaced on the frame 1410 respectively, thereby further extending the service life of the light valve system 140a. For example, the seals 143 and 144 in this embodiment may include double-sided adhesives. Specifically, the light transmissive plates 1411 and 1412 can be adhered to the frame 1410 with the double-sided adhesives, and the double-sided adhesives can fill the gaps G1 and G2. In one embodiment, the seals 143 and 144 include mechanism members, for example, the light transmissive plates 1411 and 1412 can be fixed to the frame 1410 via the foregoing mechanism members, and the foregoing mechanism members can be embedded in the gaps G1 and G2.

[0076] Figure 6 is a cross-sectional schematic view of a projection device according to another embodiment of the present invention. The structure and advantages of the projection device 100b in this embodiment are similar to those of Figure 1 the embodiment, and only the differences will be described below. Please refer to Figure 6 , the projection device 100b may further include a fan F1, wherein the fan F1 is disposed inside the housing 110b. The light valve system 140b further includes a wind guiding member 145, for example. The frame 1410 further has at least one air inlet V, and Figure 6 one air inlet V is taken as an example. The wind guiding member 145 is disposed on the side of the frame 1410 facing away from the light valve module 142, and the wind guiding member 145 is adjacent to the air inlet V, and the fan F1 is used to generate an air flow C passing through the wind guiding member 145 and the air inlet V. Specifically, the wind guiding member 145 can guide the air flow C to enter the dustproof module 141 from the air inlet V, so that the air flow C flows through the light valve 1420 and exits the dustproof module 141 from the through hole H1. Thus, the heat dissipation efficiency of the light valve 1420 can be further enhanced.

[0077] In this embodiment, the light valve system 140b may further include a dust-proof member 180. The dust-proof member 180 is disposed on the frame 1410 and covers the air inlet V to further enhance the dust-proof effect on the light valve 1420. For example, Figure 2 the shown dust-proof member 160 can be used as Figure 6 the dust-proof member 180, and the features of the dust-proof members 160 and 180 are substantially the same as each other, so the related descriptions are omitted here. Similarly, Figure 2 the part of the shown heat dissipation holes H2 opposite to the through hole H1 can be used as Figure 6 the air inlet V, but the present invention does not limit the specific features of the air inlet V. The dust barrier 170 of this embodiment may include a filter screen, so that the air flow C can more easily flow out of the dust-proof module 141 through the dust barrier 170. Incidentally, the fan F1 includes, for example, a centrifugal fan, but the present invention is not limited thereto. In addition, the housing 110b may be provided with a ventilation hole V1 corresponding to the fan F1 for the air flow C to enter the housing 110b

[0078] In this embodiment, the air guiding member 145 includes, for example, a windbreak wall W. The windbreak wall W is used to guide the air flow C generated by the fan F1 to the air inlet V, and the windbreak wall W shields the air inlet V in the positive projection direction D of the air inlet V. For example, the shape of the windbreak wall W can be arc-shaped, so that the air flow C can be guided into the dust-proof module 141 more quickly, thereby further enhancing the heat dissipation efficiency of the light valve 1420. Incidentally, the air guiding member 145 can be fixed to the edge of the air inlet V and is located on the opposite sides of the air inlet V with respect to the fan F1 to guide more air flow C into the dust-proof module 141. In addition, the air guiding member 145 is located between the air inlet V and the mounting opening O. In the positive projection direction D of the air inlet V, the air guiding member 145 can shield the mounting opening O. In this way, when the air flow C generated by the fan F1 flows between the air guiding member 145 and the air inlet V, it can flow into the accommodation space A through the air inlet V to the greatest extent. In other words, it can prevent too much air flow C from flowing out of the housing 110b through the mounting opening O, and thus guide more air flow C into the dust-proof module 141.

[0079] The air guiding member 145 and the electrical connection portion 1421 can be respectively located on the opposite sides of the frame 1410. Specifically, the air guiding member 145 can face the mounting opening O and can be used as a handle of the light valve system 140b. In this way, when the light valve system 140b is fixed to the electrical connector 130, the user can hold the air guiding member 145 through the mounting opening O, and then take out the light valve system 140b from the housing 110b through the air guiding member 145, making the light valve system 140b easier to disassemble from the housing 110b. In addition, since the air guiding member 145 can be used as a handle of the light valve system 140b, the light valve system 140b also has the advantage of simple structure.

[0080] Incidentally, the projection device 100b may also be configured with a heat dissipation module CM and a fan F2 to dissipate heat from the lighting system 120. Specifically, the heat dissipation module CM may be connected to the lighting system 120 to receive the heat energy generated by the lighting system 120. The fan F2 may then dissipate heat from the heat dissipation module CM. Further, the heat dissipation module CM includes, for example, a plurality of fins, and the fan F2 may guide the air flow C through the above-mentioned fins. Similarly, the housing 110b may also be provided with a ventilation hole V2 corresponding to the fan F2 for the air flow C to flow out of the housing 110b. The features and functions of the ventilation hole V2 are substantially the same as those of the ventilation hole V1, so the related description is omitted here. It can be understood that the flow direction of the air flow C is not limited to Figure 6 that shown. For example, in one embodiment, the air flow C may be inhaled into the housing 110b from the ventilation hole V2 by the fan F2 and then blown out of the housing 110b from the ventilation hole V1 by the fan F1.

[0081] In summary, the projection device of the embodiment of the present invention has at least one of the following advantages. The projection device of the present invention adopts a light valve system with a dust-proof module, wherein the light valve is disposed in the accommodation space of the dust-proof module. Thus, the projection device of the present invention can not only maintain the dust-proof effect on the light valve, but also make other optical elements in the housing easier to dissipate heat, and can more flexibly design the heat dissipation mechanism in the projection device. In addition, since the light valve system can be separately disassembled from the housing, it is easy to assemble, repair or replace, thereby improving the service life of the projection device and reducing the cost of the projection device.

[0082] However, the above are only the preferred embodiments of the present invention, and the scope of the embodiments of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the invention still fall within the scope covered by the patent of the present invention. In addition, any embodiment or claim of the present invention does not have to achieve all the purposes or advantages or features disclosed in the present invention. Moreover, the abstract and the title (invention name) are only used to assist in the retrieval of patent documents and are not used to limit the scope of the rights of the present invention.

Claims

1. A projection device, characterized in that, The projection device includes a housing, a lighting system, an electrical connector, a light valve system, and a projection lens, wherein: The lighting system is disposed in the housing and is configured to provide an illumination beam. The electrical connector is disposed in the housing. The light valve system includes a dust-proof module and a light valve module, wherein: The dust-proof module includes a frame and two transparent plates. The two transparent plates are respectively disposed at two opposite ends of the frame, and the frame and the two transparent plates form a receiving space. The light valve module includes a light valve and an electrical connection portion. The light valve is disposed in the receiving space. The light valve and the two transparent plates are located on the transmission path of the illumination beam, and the light valve is configured to convert the illumination beam into an image beam. The electrical connection portion passes through a through hole of the frame, and one end of the electrical connection portion located inside the receiving space is electrically connected to the light valve, and the other end of the electrical connection portion located outside the receiving space is detachably electrically connected to the electrical connector. The projection lens is disposed on the transmission path of the image beam.

2. The projection device according to claim 1, wherein The light valve system further includes a dust-proof member. The frame has at least one heat dissipation hole, and the dust-proof member is disposed on the frame and covers the at least one heat dissipation hole.

3. The projection device according to claim 1, wherein The light valve system further includes two sealing members. One of the two sealing members is disposed between the edge of one of the two transparent plates and the frame, and the other of the two sealing members is disposed between the edge of the other of the two transparent plates and the frame.

4. The projection device according to claim 1, characterized in that, The light valve system further includes a dust barrier member. The dust barrier member is disposed between the electrical connection portion and the through hole.

5. The projection device according to claim 1, wherein The electrical connector includes a card-edge connector, and the other end of the electrical connection portion located outside the receiving space includes a gold finger that is detachably electrically connected to the card-edge connector.

6. The projection device according to claim 1, wherein, The projection device further includes a fan. The fan is disposed in the housing. The light valve system further includes a wind guiding member. The frame further has at least one air inlet. The wind guiding member is disposed on a side of the frame facing away from the light valve module and is adjacent to the at least one air inlet, and the fan is configured to generate an air flow that passes through the wind guiding member and the at least one air inlet.

7. The projection device according to claim 6, wherein The light valve system further includes a dust-proof member. The dust-proof member is disposed on the frame and covers the at least one air inlet.

8. The projection device according to claim 6, wherein The wind guiding member and the electrical connection portion are respectively located on opposite sides of the frame.

9. The projection device according to claim 6, wherein, The wind guiding member includes a wind blocking wall. The wind blocking wall is configured to guide the air flow generated by the fan to the at least one air inlet, and the wind blocking wall shields the at least one air inlet in the orthographic projection direction of the at least one air inlet.

10. The projection device according to claim 1, characterized in that, The housing has an installation opening, and the light valve system is detachably fixed to the electrical connector through the installation opening.

11. The projection device according to claim 10, wherein The housing includes a cover body, and the cover body is configured to shield or expose the installation opening.

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