An LCD projector with membrane conduction heat dissipation

Abstract

This utility model discloses an LCD projector with film conduction heat dissipation, including a housing assembly; a light source assembly, an optical path assembly, and an imaging lens arranged sequentially, with the light source assembly and imaging lens respectively fixedly and through the housing assembly; a thermally conductive film assembly fixedly disposed within the housing assembly and enclosing the optical path assembly, with the light source assembly and imaging lens respectively sealed and through opposite sides of the thermally conductive film assembly; an inner heat dissipation assembly fixedly disposed within the thermally conductive film assembly; and an outer heat dissipation fan fixedly and through the outside of the housing assembly. The thermally conductive film assembly includes a thermally conductive film body, which is made of a material with high thermal conductivity, easy shaping, and foldability. This utility model effectively solves the problem of unsatisfactory heat dissipation performance in existing LCD projectors by sealing the optical path system of the LCD projector with the thermally conductive film body to form an internal space, and then through the cooperation of the inner heat dissipation assembly, the thermally conductive film body, and the outer heat dissipation fan.

Description

Technical Field

[0001] This utility model relates to the field of projector technology, and more specifically, to an LCD projector with membrane conduction heat dissipation. Background Technology

[0002] In LCD projectors, the LCD screen can only operate under polarized light in one direction of vibration, while the polarized light in the other direction of vibration will be blocked, and most of it will be converted into heat, raising the LCD temperature. When the temperature reaches a certain value, the LCD screen will malfunction or even be damaged. In order to enable the LCD screen and other optical components to work stably for a long time, it is necessary to use a fan to push the cooler air, such as the ambient air outside the machine, to convect and dissipate heat from the screen chamber composed of polarizing glass and LCD screen. This method is widely used because it is simple in structure, has high heat dissipation efficiency, and low cost. However, this structure will bring dust from the environment into the LCD display components, causing contamination and affecting the image.

[0003] To optimize dust protection for LCD projectors, the optical path must be sealed. In this configuration, since the ambient air cannot directly dissipate heat from the LCD optical components, heat must be transferred from the sealed space to the outside environment via a relay cooling system. Currently, finned relay cooling structures are commonly used. However, due to limitations in overall size, the area and number of heat dissipation fins cannot be too large, resulting in insufficient heat dissipation from the LCD optical components. Furthermore, the hot-end fins must be installed at the highest point of heated air within the optical engine, while simultaneously ensuring they do not obstruct effective light transmission. The passage of this passage presents significant challenges for design and styling. In the aforementioned finned relay heat dissipation structure, only the internal hot air flowing through the fins of the relay heat dissipation component can exchange heat; other areas, including the air in the circulation path, have no ability to dissipate heat. Furthermore, in the finned relay heat dissipation structure, the path of the circulating airflow within the sealed screen is singular after stabilization, causing a large amount of hot air to remain trapped and unable to participate in heat exchange, including the air within the optical path, which occupies the largest volume. This is one of the main reasons for the temperature rise within the screen, and the finned relay heat dissipation structure is also relatively expensive. Therefore, an LCD projector with film conduction heat dissipation is provided to solve the above problems. Utility Model Content

[0004] One of the objectives of this invention is to provide an LCD projector with membrane conduction heat dissipation, so as to solve the problem of unsatisfactory heat dissipation performance of existing LCD projectors.

[0005] This utility model discloses an LCD projector with membrane conduction heat dissipation, which can be achieved through the following technical solution: This utility model discloses an LCD projector with membrane conduction heat dissipation, comprising a housing assembly; a light source assembly, an optical path assembly, and an imaging lens arranged sequentially, wherein the light source assembly and the imaging lens are respectively fixedly and through the housing assembly; a thermally conductive film assembly fixedly disposed in the housing assembly and enclosing the optical path assembly, wherein the light source assembly and the imaging lens are respectively sealed and through the opposite sides of the thermally conductive film assembly; an inner heat dissipation assembly fixedly disposed in the thermally conductive film assembly; and an outer heat dissipation fan fixedly and through the outside of the housing assembly. The thermal conductive film assembly includes a thermal conductive film body, which is made of a material that has a high thermal conductivity, is easy to shape, and can be folded.

[0006] In one embodiment, a gap is provided between the housing assembly and the thermally conductive film assembly.

[0007] In one embodiment, the light source assembly includes an outer cavity fixedly disposed on the housing assembly and sealed and connected to the thermal conductive film assembly; a light source body fixedly disposed in the outer cavity; a heat sink fixedly disposed in the outer cavity and in close contact with the light source body; and a light source collimator fixedly disposed in the outer cavity and disposed on one side of the light source body.

[0008] In one embodiment, the heat sink is a heat pipe heat sink assembly. One end of the heat sink is in close contact with the light source body, and the other end is in close contact with the inner wall of the outer cavity. An LED cooling fan is also provided on the outer side of the outer cavity.

[0009] In one embodiment, the optical path assembly includes a first Fresnel mirror, a polarizer, an LCD screen, and a second Fresnel mirror arranged sequentially and on the same straight line.

[0010] In one embodiment, the imaging lens and the optical path assembly are arranged in a straight line or between the two with a reflector at a 45° angle.

[0011] In one embodiment, the thermal conductive film body is made of copper foil, aluminum foil, tin foil, or graphene film.

[0012] In one embodiment, the internal heat dissipation component includes an internal diffuser fan and an internal turbulence fan, both of which are fixedly disposed in the thermal conductive film component.

[0013] In one embodiment, at least one of the external heat dissipation fans is fixedly disposed on the outside of the housing assembly, and the external heat dissipation fan is disposed in the corresponding external area where the heat exchange in the internal space of the heat-conducting film assembly is relatively large.

[0014] In one embodiment, a semiconductor cooling chip is fixedly disposed through the housing assembly, and the cold end of the semiconductor cooling chip is in contact with the outer surface of the thermal conductive film body.

[0015] Compared with the prior art, the beneficial effects of this utility model of an LCD projector with membrane conduction heat dissipation are as follows: This invention relates to an LCD projector with membrane conduction heat dissipation. The heat-conducting film body seals the optical path system of the LCD projector to form an internal space. An internal diffuser fan and an internal turbulence fan work together to conduct heat generated by the optical path components to the heat-conducting film body. Then, an external heat dissipation fan and a semiconductor cooling chip work together to conduct the heat from the heat-conducting film body to the outside atmosphere. A heat sink and an LED heat dissipation fan work together to dissipate heat generated by the light source body, effectively solving the problem of unsatisfactory heat dissipation performance in existing LCD projectors. Furthermore, this LCD projector features a simple structure, low cost, and easy assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of an LCD projector with membrane conduction heat dissipation according to the present invention; Figure 2 This is a longitudinal cross-sectional schematic diagram of an LCD projector with membrane conduction heat dissipation according to the present invention; Figure 3 This is an exploded view of an LCD projector with membrane conduction heat dissipation according to this utility model.

[0018] The diagram shows: 10, LCD projector; 11, housing assembly; 111, spacer; 12, light source assembly; 121, outer cavity; 122, light source body; 123, heat sink; 124, light source collimator; 13, optical path assembly; 131, first Fresnel lens; 132, polarizer; 133, LCD screen; 134, second Fresnel lens; 14, imaging lens; 15, thermal conductive film assembly; 151, through hole; 16, internal heat dissipation assembly; 161, internal diffuser fan; 162, internal turbulence fan; 17, external heat dissipation fan; 18, semiconductor cooling chip. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-3 As shown, the LCD projector 10 with membrane conduction heat dissipation of this utility model mainly includes a housing assembly 11, a light source assembly 12, an optical path assembly 13, an imaging lens 14, a thermally conductive film assembly 15, an internal heat dissipation assembly 16, an external heat dissipation fan 17, and a semiconductor cooling chip 18. The housing assembly 11 is a hollow cavity, which serves as the supporting body. The light source assembly 12, the optical path assembly 13, and the imaging lens 14 are arranged sequentially, and the light source assembly 12 and the imaging lens 14 are respectively fixedly and through-mounted on the housing assembly 11. The thermally conductive film assembly 15 is fixedly mounted in the housing assembly 11 and wraps around the optical path assembly 13, while the light source assembly 12 and the imaging lens 14 are respectively tightly and closely mounted on the housing assembly 11. A sealing element is disposed on both sides of the thermal conductive film assembly 15, thereby sealing and enclosing the optical path assembly 13 for heat conduction. An inner heat dissipation assembly 16 is fixedly disposed in the thermal conductive film assembly 15, which uniformly diffuses the heat generated by the imaging lens 14, thereby enabling the thermal conductive film assembly 15 to perform uniform heat conduction. An outer heat dissipation fan 17 is fixedly disposed on the outside of the housing assembly 11, which dissipates the heat in the housing assembly 11. A semiconductor cooling chip 18 is fixedly disposed through the housing assembly 11, with its cold end in contact with the thermal conductive film assembly 15, thereby facilitating heat dissipation of the thermal conductive film assembly 15.

[0022] Please see Figures 1-3As shown, in this embodiment, the housing assembly 11 is made of plastic, and a gap 111 is provided between it and the heat-conducting film assembly 15, allowing air to circulate within the gap 111, thereby facilitating heat dissipation of the heat-conducting film assembly 15. In this embodiment, the light source assembly 12 includes an outer cavity 121, a light source body 122, a heat sink 123, and a light source collimator 124; the outer cavity 121 is a hollow cavity, which is fixedly mounted on the housing assembly 11 and sealed and connected to the heat-conducting film assembly 15, so that the light emitted by the light source body 122 can be projected onto the optical path assembly 13; the light source body 122 is fixedly mounted in the outer cavity 121 and is the light-emitting body; the heat sink 123 is fixedly mounted in the outer cavity 121 and is in close contact with the light source body 122, providing heat dissipation for the light source body 122; the light source collimator 124 is fixedly mounted in the outer cavity 121 and is located on one side of the light source body 122, its function being to reshape the large-angle divergent light emitted by the light source body 122 into quasi-parallel light. Specifically, a sealing ring is provided at the connection between the outer cavity 121 and the heat-conducting film assembly 15 to prevent outside air from entering the heat-conducting film assembly 15 through the connection between the outer cavity 121 and the heat-conducting film assembly 15; the heat sink 123 is a heat pipe heat sink assembly, one end of which is in close contact with the light source body 122, and the other end of the heat sink 123 is in close contact with the inner wall of the outer cavity 121. In order to enhance the heat dissipation performance of the heat sink 123, an LED cooling fan is also provided on the outside of the outer cavity 121 to dissipate heat from the heat sink 123; the light source collimator 124 is a lens, lens group or light cone.

[0023] Please see Figure 2 and Figure 3As shown, in this embodiment, the optical path assembly 13 includes a first Fresnel mirror 131, a polarizer 132, an LCD screen 133, and a second Fresnel mirror 134 arranged sequentially and on the same straight line. The heat-conducting film assembly 15 encloses the first Fresnel mirror 131, the polarizer 132, the LCD screen 133, and the second Fresnel mirror 134. The first Fresnel mirror 131 focuses the light passing through the collimator 124. The polarizer 132 filters the total aurora (including S and P light) emitted by the light source body 122 into monopolar S light or monopolar P light. The LCD screen 133 is the source of images and colors for the LCD projector 10. The second Fresnel mirror 134 is used to adapt to the focal length of the imaging lens 14. In this embodiment, the imaging lens 14 is fixedly mounted on the housing assembly 11 and extends through into the heat-conducting film assembly 15. A sealing ring is provided at the connection between the imaging lens 14 and the heat-conducting film assembly 15 to prevent outside air from entering the heat-conducting film assembly 15 through the connection between the imaging lens 14 and the heat-conducting film assembly 15. Specifically, the imaging lens 14 and the optical path assembly 13 are in a straight line. In another embodiment, a reflector at a 45° angle is also provided between the imaging lens 14 and the optical path assembly 13 to reflect the image projected by the optical path assembly 13 onto the imaging lens 14.

[0024] Please see Figure 2 and Figure 3 As shown, in this embodiment, the thermal conductive film assembly 15 includes a support mechanism and a thermal conductive film body; the support mechanism is fixedly disposed in the housing assembly 11; the thermal conductive film body is disposed on the support mechanism and wraps around the optical path assembly 13, and the outer cavity 121 and the imaging lens 14 are respectively sealed and penetrate through the opposite sides of the thermal conductive film body, thereby enabling the thermal conductive film assembly 15 to perform a sealing and heat-conducting operation on the optical path assembly 13. Specifically, the thermal conductive film body is made of a material with high thermal conductivity, easy shaping and foldability. Preferably, the thermal conductive film body is made of copper foil film, aluminum foil film, tin foil film or graphene film; through holes 151 are respectively provided at opposite ends of the thermal conductive film body, and the outer cavity 121 and the imaging lens 14 penetrate through the thermal conductive film body through the corresponding through holes 151.

[0025] Please see Figure 2 and Figure 3As shown, in this embodiment, the internal heat dissipation component 16 includes an internal diffuser fan 161 and an internal turbulence fan 162, both of which are fixedly installed in the heat-conducting film component 15. The internal diffuser fan 161 drives the air in the internal space of the heat-conducting film component 15 to flow over the surface of the optical path component 13 and fan out the heat in a convection manner. This hot air will return to the air inlet of the internal diffuser fan 161 along one or more paths to achieve internal circulation, thereby achieving uniform diffusion of the hot air in the internal space of the heat-conducting film component 15, so that the heat generated by the optical path component 13 is uniformly conducted to the heat-conducting film body. The internal turbulence fan 162 can fully agitate and mix the air in the internal space of the heat-conducting film assembly 15 before it participates in the convective heat dissipation cycle of the optical path assembly 13. This prevents the hot air participating in the heat dissipation of the internal space of the heat-conducting film assembly 15 from circulating in a closed space along a single path, resulting in a large amount of air stagnation. When the hot air in the internal space of the heat-conducting film assembly 15 exchanges heat with the inner wall of the heat-conducting film body, it is not uniform across the entire film surface. However, due to the high thermal conductivity of the heat-conducting film body itself, the heat conducted to the heat-conducting film body will be uniformized, which is conducive to more efficient absorption of heat in the internal space of the heat-conducting film assembly 15.

[0026] Please see Figures 1-3 As shown, in this embodiment, two external cooling fans 17 are respectively fixedly installed on the outside of the housing assembly 11. They utilize ambient air to dissipate heat from the outer surface of the heat-conducting film body, thereby reducing the temperature inside the heat-conducting film assembly 15. The external cooling fans 17 are located in the corresponding external areas where heat exchange is relatively large inside the heat-conducting film assembly 15. In other embodiments, the number of external cooling fans 17 can be one, three, four, or many other numbers, depending on actual needs.

[0027] It should be noted that the specific heat dissipation process of the LCD projector 10 with membrane conduction heat dissipation of this utility model is as follows: the heat dissipation component 123 and the LED heat dissipation fan work together to dissipate the heat generated by the light source body 122; the heat generated by the optical path component 13 is conducted to the heat-conducting film body through the cooperation of the internal diffusion fan 161 and the internal turbulence fan 162; and the heat on the heat-conducting film body is conducted to the outside atmosphere through the cooperation of the external heat dissipation fan 17 and the semiconductor cooling chip 18, thereby completing the specific heat dissipation operation of the LCD projector 10.

[0028] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An LCD projector with film conduction heat dissipation, characterized in that, The device includes a housing assembly; a light source assembly, an optical path assembly, and an imaging lens arranged sequentially, wherein the light source assembly and the imaging lens are respectively fixedly and through the housing assembly; a thermally conductive film assembly fixedly disposed in the housing assembly and enclosing the optical path assembly, wherein the light source assembly and the imaging lens are respectively sealed and through the opposite sides of the thermally conductive film assembly; an internal heat dissipation assembly fixedly disposed in the thermally conductive film assembly; and an external heat dissipation fan fixedly and through the outside of the housing assembly. The thermal conductive film assembly includes a thermal conductive film body, which is made of a material that has a high thermal conductivity, is easy to shape, and can be folded.

2. The LCD projector with film conduction heat dissipation according to claim 1, wherein, A gap is provided between the housing assembly and the thermally conductive film assembly.

3. The LCD projector with film conduction heat dissipation according to claim 1, wherein, The light source assembly includes an outer cavity, which is fixedly mounted on the housing assembly and is sealed and connected to the thermal conductive film assembly; a light source body fixedly mounted in the outer cavity; a heat sink fixedly mounted in the outer cavity and in close contact with the light source body; and a light source collimator fixedly mounted in the outer cavity and located on one side of the light source body.

4. An LCD projector with membrane conduction heat dissipation according to claim 3, characterized in that, The heat sink is a heat pipe heat sink assembly. One end of the heat sink is in close contact with the light source body, and the other end is in close contact with the inner wall of the outer cavity. An LED cooling fan is also provided on the outside of the outer cavity.

5. An LCD projector with membrane conduction heat dissipation according to claim 1, characterized in that, The optical path assembly includes a first Fresnel mirror, a polarizer, an LCD screen, and a second Fresnel mirror arranged sequentially and on the same straight line.

6. An LCD projector with membrane conduction heat dissipation according to claim 5, characterized in that, The imaging lens and the optical path assembly are aligned in a straight line or are positioned between each other by a reflector at a 45° angle.

7. An LCD projector with membrane conduction heat dissipation according to claim 1, characterized in that, The thermal conductive film body is made of copper foil, aluminum foil, tin foil, or graphene film.

8. An LCD projector with membrane conduction heat dissipation according to claim 1, characterized in that, The internal heat dissipation component includes an internal diffuser fan and an internal turbulence fan, both of which are fixedly installed in the thermal conductive film component.

9. An LCD projector with membrane conduction heat dissipation according to any one of claims 1-8, characterized in that, At least one of the external heat dissipation fans is fixedly disposed on the outside of the housing assembly, and the external heat dissipation fan is disposed in the corresponding external area where the heat exchange in the internal space of the heat-conducting film assembly is relatively large.

10. An LCD projector with membrane conduction heat dissipation according to any one of claims 1-8, characterized in that, A semiconductor cooling chip is fixedly and penetrated on the housing assembly, and the cold end of the semiconductor cooling chip is in contact with the outer surface of the thermal conductive film body.

Images