Projection device

Abstract

The present application provides a projection device, which includes an illumination system, an optical engine module, a projection lens, at least one first housing, at least one second housing and at least one optical element. The at least one first housing includes a first flow channel for allowing a first fluid to pass therethrough. The at least one second housing is connected to the at least one first housing to form a receiving space. The at least one optical element is arranged in the receiving space, wherein heat generated by the at least one optical element is transferred to outside of the at least one first housing by the first fluid. The projection device can save a heat dissipation device arranged outside the first housing, so as to reduce assembly difficulty.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a projection device having a highly thermally conductive housing. Background Technology

[0002] A projection device is a display device used to produce large-screen images, and it has been continuously improving with the evolution and innovation of technology. The imaging principle of a projection device is to convert the illumination beam generated by the lighting system into an image beam through a light valve, and then project the image beam onto the target object (such as a screen or wall) through a projection lens to form a projected image.

[0003] Recent advancements in projection devices utilize laser light sources as excitation sources. The excitation beam emitted by the laser light source illuminates a wavelength conversion device (such as a phosphor wheel or phosphor disk). The wavelength conversion material on the device absorbs the excitation beam, generating a converted beam with a different wavelength. However, this wavelength conversion device generates heat during the excitation process, therefore a heat dissipation device is installed around it.

[0004] In existing technologies, the wavelength conversion device is installed in an air duct, which contains an air-liquid heat exchanger where circulating air exchanges heat with incoming water. Alternatively, a heat exchanger can be installed inside the housing of the wavelength conversion device to transfer heat from the housing to the outside. However, these heat dissipation devices not only result in a larger air duct volume due to the circulating air duct design, but also require an air-liquid heat exchanger within the duct, increasing assembly steps and complexity.

[0005] The "Background Art" paragraph is only used to help understand the content of this invention. Therefore, the content disclosed in the "Background Art" paragraph may include some prior art that is not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not mean that the content or the problem to be solved by one or more embodiments of this invention was known or recognized by those skilled in the art before this application was filed. Summary of the Invention

[0006] The present invention provides a projection device that can save the heat dissipation device configured on the outside of the first housing, thereby reducing the assembly difficulty.

[0007] Other objects and advantages of the present invention can be further understood from the technical features disclosed herein.

[0008] To achieve one or more of the above-mentioned objectives, or other objectives, the present invention provides a projection device comprising an illumination system, an optomechanical module, a projection lens, at least one first housing, at least one second housing, and at least one optical element. The illumination system provides an illumination beam. The optomechanical module is disposed in the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is disposed in the transmission path of the image beam to project the image beam out of the projection device. The at least one first housing includes a first flow channel for a first fluid to pass through it. The at least one second housing is connected to the at least one first housing to form an accommodating space. The at least one optical element is disposed in the accommodating space, wherein the at least one optical element is a component of at least one of the illumination system, the optomechanical module, and the projection lens. Heat generated by the at least one optical element is transferred to the outside via the first fluid.

[0009] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the projection device of the present invention, the housing of the lighting system, the optical engine module, and / or a portion of the projection lens can be designed as a first housing. The first housing includes a first flow channel for the transfer of a first fluid therein. At least one optical element is disposed in the accommodating space formed by the first housing and the second housing, and the at least one optical element is a component in the lighting system, the optical engine module, and / or a portion of the projection lens, so that the heat generated by the optical element is transferred to the outside of the first housing by the first fluid in the first housing. In this way, the optical elements located in the lighting system, the optical engine module, and / or the projection lens can achieve heat dissipation through the first housing, further saving the fan device disposed on the outside of the first housing, thereby reducing assembly difficulty and saving the circulating airflow channel required by the fan device.

[0010] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention.

[0012] Figure 2 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0015] Figure 5 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0016] Figure 6A and Figure 6B These are schematic diagrams of a portion of the projection device according to another embodiment of the present invention before and after assembly.

[0017] Figure 7 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0018] Figure 8 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0019] Figure 9 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0020] Figure 10 This is a schematic diagram of a partial projection device according to another embodiment of the present invention.

[0021] Figure 11 for Figure 2 An enlarged schematic diagram of the interior of the first housing.

[0022] Figure 12 This is a partially enlarged schematic diagram of the interior of the first housing according to another embodiment of the present invention.

[0023] Figure 13 This is a partially enlarged schematic diagram of the interior of the first housing according to another embodiment of the present invention. Detailed Implementation

[0024] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the accompanying views. The directional terms mentioned in the following embodiments (e.g., up, down, left, right, front, or back) are only for reference to the accompanying views. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0025] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention, and is for illustrative purposes only. Please refer to... Figure 1 The projection device 100 provided in this embodiment includes an illumination system 110, an optical engine module 120, a projection lens 130, at least one first housing 140, at least one optical element 150, and at least one second housing 160 (e.g., ...). Figure 2 The illumination system 110 provides an illumination beam LB. The optomechanical module 120 is disposed in the transmission path of the illumination beam LB and is used to convert the illumination beam LB into an image beam LI. The projection lens 130 is disposed in the transmission path of the image beam LI and is used to project the image beam LI out of the projection device 100 onto a projection target (not shown), such as a screen or wall.

[0026] In detail, the lighting system 110 is composed of, for example, multiple light-emitting elements, wavelength conversion elements, light-diffusing elements, light-filtering elements, and multiple light-splitting and combining elements, to provide light beams of different wavelengths to form an illumination beam LB. The multiple light-emitting elements are, for example, light-emitting diodes (LEDs) or laser diodes (LDs). However, the present invention does not limit the type or form of the lighting system 110 in the projection device 100; its detailed structure and implementation can be adequately taught, suggested, and described by common knowledge in the relevant art, and therefore will not be elaborated further.

[0027] The optomechanical module 120, for example, is composed of multiple prism elements, at least one light valve, and multiple optical elements of different types, for receiving the illumination beam LB provided by the illumination system 110. The optical element 150 includes a light valve, which modulates the illumination beam LB into an image beam L1. The light valve is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel) or a Digital Micro-mirror Device (DMD). In some embodiments, the light valve may also be a transmissive light modulator such as a Transparent Liquid Crystal Panel, an Electro-Optical Modulator, a Magneto-Optic Modulator, or an Acousto-Optic Modulator (AOM). This invention does not limit the type or form of the light valve. The detailed steps and implementation methods of the method for converting the illumination beam LB into the image beam L1 using the light valve are readily available from common knowledge in the relevant technical field and will not be elaborated further. In this embodiment, the number of light valves is one, for example, a projection device 100 using a single digital micromirror element, but in other embodiments there may be multiple, and the present invention is not limited thereto.

[0028] The projection lens 130 may include, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses including biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 130 may also include planar optical lenses to reflectively project the image beam L1 from the optomechanical module 120 onto the projection target. The present invention does not limit the type or form of the projection lens 70.

[0029] Figure 2 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 1 and Figure 2 . Figure 2 The displayed projection device can be applied to at least Figure 1 In this embodiment, at least one first housing 140 includes a first flow channel C1 for passing a first fluid F1 within the first flow channel C1 to transfer heat generated by at least one optical element 150 to the outside of the at least one first housing 140. The first fluid F1 is, for example, water, but is not limited thereto. At least one second housing 160 is connected to at least one first housing 140 to form a receiving space E, and at least one optical element 150 is disposed in the receiving space E. In other words, in this embodiment, the first housing 140 is a housing with high thermal conductivity, while the second housing 160 is a metal housing without flow channels.

[0030] Optical element 150 may be disposed in at least one of the illumination system 110, the optomechanical module 120, and the projection lens 130, and the heat generated by optical element 150 is conducted to the outside of at least one first housing 140 by heat convection through a first fluid F1 transferred inside at least one first housing 140, thereby achieving the effect of heat dissipation for optical element 150. Optical element 150 may be defined as a wavelength conversion device of illumination system 110, at least one optical valve of optomechanical module 120, and a prism element of optomechanical module 120, or any combination thereof. For example, in Figure 1 In this embodiment, optical element 150A is, for example, a wavelength conversion device (phosphor wheel) of illumination system 110, and optical element 150B is, for example, at least one light valve and prism element (e.g., TIR prism) of optomechanical module 120. In this way, the optical elements 150 located in illumination system 110 and optomechanical module 120 can achieve heat dissipation through the configuration of at least one first housing 140. Furthermore, at least one first housing 140 can also cover part of the projection lens 130, achieving heat dissipation for the projection lens 130 through the first housing 140. The above configuration can further reduce the need for a fan device located outside the first housing, thereby reducing assembly difficulty and saving the circulating airflow channels required by the fan device.

[0031] Figure 3 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 3 The projection device 100A shown in this embodiment is similar to... Figure 2The projection device 100 shown differs from the previous one in that, in this embodiment, the projection device 100A further includes at least one heat dissipation element 170, which is disposed in the accommodating space E for dissipating heat from the optical element 150 (fluorescent wheel). For example, in this embodiment, the heat dissipation element 170 is, for example, a fan, and there are, for example, two fans, respectively disposed on opposite sides of the optical element 150. In this way, the convection effect in the accommodating space E can be further improved, thereby effectively transferring heat to at least one first housing 140, and thus improving the heat dissipation effect on the optical element 150.

[0032] Figure 4 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 4 The projection device 100B shown in this embodiment is similar to... Figure 3 The projection device 100 shown differs from the previous one in that, in this embodiment, the optical element 150 is directly connected to at least one first housing 140. A heat dissipation element 170 is disposed in the accommodating space E to dissipate heat from the optical element 150. In this way, the heat generated by the optical element 150 is transferred to at least one first housing 140 by thermal conduction, thereby further improving the heat dissipation effect.

[0033] Figure 5 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 5 The projection device 100C shown in this embodiment is similar to... Figure 4 The projection device 100 shown differs from the previous one in that, in this embodiment, the first housing 140 further includes multiple heat dissipation fins 142, which are connected to the first flow channel C1 and located within the accommodating space E. When the optical element 150 (fluorescent wheel) generates heat, some of the heat is directly carried away by the first fluid F1 through thermal conduction. Simultaneously, the heat dissipation element 170 carries another portion of the heat to the air within the accommodating space E through thermal convection. The heat carried by the air within the accommodating space E is then transferred to the multiple heat dissipation fins 142, and then conducted to the first fluid F1 by the multiple heat dissipation fins 142. In this way, the thermal convection effect in the accommodating space E can be further improved, thereby enhancing the heat dissipation effect.

[0034] Figure 6A and Figure 6B These are schematic diagrams of a portion of the projection device according to another embodiment of the present invention before and after assembly. Please refer to... Figure 6A and Figure 6B The projection device 100D shown in this embodiment is similar to... Figure 3The projection device 100A is shown. The difference between the two is that, in this embodiment, the first housing 140 further includes at least one first locking structure 144, which is correspondingly connected to the second housing 160. In this embodiment, the number of first locking structures 144 is, for example, two, respectively disposed at the front and rear ends of the first housing 140. This enhances the airtightness between the first housing 140 and the second housing 160, preventing external dust from entering the accommodating space E, further improving internal heat convection, and strengthening heat exchange between the air in the accommodating space E and the first housing 140.

[0035] Figure 7 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 7 The projection device 100E shown in this embodiment is similar to... Figure 6B The projection device 100D is shown. The difference between the two is that, in this embodiment, the second housing 160A includes a second flow channel C2 for transferring the second fluid F2 within the second housing 160A. Heat generated by the optical element 150 is also transferred to the outside of the second housing 160A via the second fluid F2. In other words, in this embodiment, both the first housing 140 and the second housing 160A are housings with high thermal conductivity and have their own independent flow channels. In this embodiment, the transfer direction of the first fluid F1 is the same as the transfer direction of the second fluid F2. Furthermore, the second housing 160A includes at least one second locking structure 162, correspondingly connected to at least one first locking structure 144. In this way, the optical element 150 can achieve better heat dissipation through the configuration of both the first housing 140 and the second housing 160A.

[0036] Figure 8 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 8 The projection device 100E shown in this embodiment is similar to... Figure 6B The projection device 100D is shown. The difference between the two is that, in this embodiment, the first flow channel C1 and the second flow channel C2 are connected, and the first fluid F1 flows through the second flow channel C2. In this embodiment, for example, a connecting member 155 is configured between the first flow channel C1 and the second flow channel C2. The connecting member 155 has a third flow channel C3 for connecting the first flow channel C1 and the second flow channel C2. The connecting member 155 can be welded, assembled, or integrally formed with the first housing 140 and the second housing 160A. In this way, the optical element 150 can simultaneously achieve heat dissipation through the configuration of the first housing 140 and the second housing 160A.

[0037] Figure 9 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 9The projection device 100G shown in this embodiment is similar to... Figure 2 The projection device 100 shown is different from the previous one. In this embodiment, the projection device 100G also includes a cooling device 180, which is connected to the first housing 140 to cool and transfer the first fluid F1. The cooling device 180 and the first housing 140 form a cooling system CS. Specifically, in this embodiment, the cooling device 180 includes components such as a heat exchanger 182, a tank 184, and a pump 186. The cooling device 180 is connected to the first housing 140, and the first fluid F1 flows in the cooling system CS. In this way, the optical element 150 can achieve heat dissipation through the configuration of the first housing 140, which can further save the fan device configured on the outside of the first housing, thereby reducing the assembly difficulty and saving the circulating airflow channel required by the fan device.

[0038] Figure 10 This is a schematic diagram of a partial projection device according to another embodiment of the present invention. Please refer to... Figure 10 The projection device 100H shown in this embodiment is similar to... Figure 9 The projection device 100G is shown. The difference between the two is that, in this embodiment, the projection device 100H has multiple first housings 140, and a cooling device 180 is connected between the multiple first housings 140. In this way, the multiple optical elements 150 can achieve heat dissipation through the arrangement of the multiple first housings 140. For example, the multiple optical elements 150 are light-emitting elements, light valves, prisms, or part of the projection lens, and each of the multiple first housings 140 can surround the aforementioned optical element 150 or a portion of the optical element 150. Furthermore, in other embodiments, the first housing 140 of the projection device 100H can cover the lighting system 110, the optical engine module 120, and part of the projection lens 130. By transferring the heat generated by the multiple optical elements 150 to the outside of the first housing 140 through the first housing 140, the fan device disposed on the outside of the first housing can be further reduced, thereby reducing assembly difficulty and saving the circulating airflow channels required by the fan device.

[0039] Figure 11 for Figure 2 An enlarged schematic diagram of the interior of the first housing. Figure 12 This is a partially enlarged schematic diagram of the interior of the first housing according to another embodiment of the present invention. Figure 13 This is a partially enlarged schematic diagram of the interior of the first housing according to another embodiment of the present invention. Please refer to... Figures 11 to 13In different embodiments, the interior of the first housings 140A, 140B, and 140C further includes a plurality of flow channel fins 146 and 146A, which are disposed in the first flow channel C1. For example, the plurality of flow channel fins 146 of the first housing 140A are, for example, columnar in shape, such as... Figure 11 As shown. Alternatively, the shape of the plurality of flow channel fins 146A of the first housing 140B may be, for example, wing-shaped or plate-shaped, such as... Figure 12 As shown. In another embodiment, the first housing 140C may further be designed and configured with multiple flow channel fins 146 in a multi-layered arrangement within the first flow channel C1, such as... Figure 13 As shown, this further enhances the thermal convection of the first fluid F1 in the first flow channel C1, and further improves the heat dissipation effect.

[0040] In summary, in the projection device of the present invention, a portion of the housing of the lighting system, the optical engine module, and / or the projection lens can be designed as a first housing, including a first flow channel for transferring a first fluid within the first housing. At least one optical element is disposed within the accommodating space formed by the first housing and the second housing, and this at least one optical element is a component of the lighting system, the optical engine module, and / or the projection lens. Heat generated by the optical element is transferred to the outside of the first housing via the first fluid within the first housing. In this way, the optical elements located in the lighting system, the optical engine module, and / or the projection lens can achieve heat dissipation through the arrangement of the first housing, further reducing the need for a fan device disposed on the outside of the first housing, thereby reducing assembly difficulty and saving the circulating airflow channel required by the fan device.

[0041] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the invention are still within the scope of this patent. Furthermore, no embodiment or claim of the present invention needs to achieve all the objectives, advantages, or features disclosed in the present invention. In addition, the abstract and title of the invention are used only to assist in patent document retrieval and are not intended to limit the scope of the invention. Furthermore, the terms "first," "second," etc., mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

[0042] List of reference numerals

[0043] 100, 100A~100H: Projection device

[0044] 110: Lighting System

[0045] 120: Optomechanical Module

[0046] 130: Projection lens

[0047] 140, 140A~140C: First shell

[0048] 142: Heat dissipation fins

[0049] 144: First locking structure

[0050] 146, 146A: Flow channel fins

[0051] 150, 150A, 150B: Optical components

[0052] 155: Connecting element

[0053] 160, 160A: Second housing

[0054] 162: Second locking structure

[0055] 170: Heat dissipation element

[0056] 180: Cooling device

[0057] 182: Heat exchanger

[0058] 184: Water tank

[0059] 186: Pump

[0060] C1: First flow channel

[0061] C2: Second flow channel

[0062] C3: Third flow channel

[0063] CS: Cooling System

[0064] E: Compartment space

[0065] F1: First fluid

[0066] F2: Second fluid

[0067] LB: Illumination beam

[0068] LI: Image beam.

Claims

1. A projection device, characterized in that, The projection device includes an illumination system, an optomechanical module, a projection lens, at least one first housing, at least one second housing, a cooling device, and at least one optical element, wherein: The lighting system is used to provide a beam of light; The optomechanical module is configured in the transmission path of the illumination beam to convert the illumination beam into an image beam; The projection lens is positioned on the transmission path of the image beam to project the image beam out of the projection device; The at least one first housing includes a first flow channel for allowing a first fluid to pass through it; The at least one second housing is connected to the at least one first housing to form a receiving space, wherein the first fluid does not flow into the interior of the receiving space; The at least one optical element is disposed in the accommodating space, wherein the heat generated by the at least one optical element is transferred to the outside of the at least one first housing via the first fluid; The cooling device is connected to the at least one first housing for cooling and transferring the first fluid, and the cooling device and the at least one first housing form a cooling system.

2. The projection device according to claim 1, characterized in that, The at least one optical element is one or a combination of the wavelength conversion device of the illumination system, at least one optical valve of the optomechanical module, a prism element of the optomechanical module, and a portion of the projection lens.

3. The projection device according to claim 1, characterized in that, The projection device further includes at least one heat dissipation element, which is disposed in the accommodating space for dissipating heat from the at least one optical element.

4. The projection device according to claim 1, characterized in that, The at least one optical element is directly connected to the at least one first housing.

5. The projection device according to claim 1, characterized in that, The at least one first housing further includes a plurality of heat dissipation fins, which are connected to the first flow channel and located within the accommodating space.

6. The projection device according to claim 1, characterized in that, The at least one first housing further includes at least one first locking structure, which is correspondingly connected to the at least one second housing.

7. The projection device according to claim 6, characterized in that, The at least one second housing includes at least one second locking structure, which is correspondingly connected to the at least one first locking structure.

8. The projection device according to claim 1, characterized in that, The at least one second housing includes a second flow channel for passing a second fluid therein, and the heat generated by the at least one optical element is also transferred to the outside of the at least one second housing via the second fluid.

9. The projection device according to claim 8, characterized in that, The first flow channel is connected to the second flow channel, and the first fluid flows through the second flow channel.

10. The projection device according to claim 1, characterized in that, The number of the at least one first housing is multiple, and the cooling device is connected between the multiple first housings.

11. The projection device according to claim 1, characterized in that, The at least one first housing further includes a plurality of flow channel fins disposed in the first flow channel.

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