WO2021109783A1

WO2021109783A1 - Polarization conversion system and projector

Info

Publication number: WO2021109783A1
Application number: PCT/CN2020/126556
Authority: WO
Inventors: 邓高飞; 周建华; 余新; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2019-12-03
Filing date: 2020-11-04
Publication date: 2021-06-10
Also published as: CN211348968U

Abstract

A polarization conversion system, comprising: a housing (1) forming a sealed accommodating space, wherein heat dissipation fins (17) are provided on the housing (1); and a polarization conversion module (2) located in the accommodating space. Hence, the present invention improves the dustproof effect of the polarization conversion module (2), and enhances the heat dissipation performance of the polarization conversion system, thereby prolonging the service life of the system. Further provided is a projector.

Description

Polarization conversion system and projector

Technical field

This application relates to the field of optical component heat dissipation technology, and in particular to a polarization conversion system and a projector.

Background technique

The polarization conversion system (PCS) is a very important component in the projection system, and its performance has a great influence on the light utilization, contrast, and image color saturation of the projection system.

The inventors of the present application have discovered during long-term research and development that in order to meet the heat dissipation requirements of the polarization conversion system, the prior art design is open, that is, the polarization conversion system housing has two openings, and a fan is installed at one opening to be polarized. The inside of the conversion system module blows air, and the other opening blows air. The shortcomings of this design are very obvious. When the projector is in a dusty environment, the surface of the polarization conversion system will accumulate dust. Even if the whole machine has an initial dust-proof design, it still cannot block the entry of fine dust particles. After a long time, The surface of the mirror of the polarization conversion system collects a lot of dust. When strong light comes in, it will cause the dust to be heated. When the temperature of the dust rises to a certain level, the mirror of the polarization conversion system will be broken due to the high temperature, causing the polarization conversion system module to be abnormal, and finally the light output effect of the whole machine will be abnormal, affecting Customer use.

Utility model content

The present application provides a polarization conversion system and a projector, which can improve the dustproof effect of the polarization conversion system, and can also enhance the heat dissipation performance of the polarization conversion system.

In order to solve the above technical problems, a technical solution adopted in this application is to provide a polarization conversion system. The polarization conversion system includes a housing forming a sealed accommodating space, wherein the housing is provided with heat dissipation fins; The module is located in the accommodating space.

Wherein, the housing includes a bottom plate; a cover plate arranged opposite to the bottom plate; and a side plate located between the bottom plate and the cover plate. The bottom plate, the side plate, and the cover plate form an accommodating space, and the side plate includes a first side plate and a second side plate , The third transparent side plate, the fourth transparent side plate, the first side plate and the second side plate are arranged oppositely, at least one of the first side plate, the second side plate and the bottom plate is provided with heat dissipation fins; the third transparent side plate It is arranged opposite to the fourth transparent side plate, and is used to transmit the incoming and outgoing light of the polarization conversion module.

Wherein, the polarization conversion system further includes a fan, and the fan is located between the cover plate and the polarization conversion module.

Among them, the cover plate is provided with a wire hole for leading out the power cord of the fan, and the cover plate is also provided with a sealing silicone gasket and a wire crimping plate, which are sequentially attached to the wire hole for conducting the power line of the fan. Fit and seal.

Wherein, the crimping plate is made of plastic material, the cover is also provided with a crimping plate cover, which is covered on the crimping plate, and the crimping plate cover is made of metal.

Wherein, a shading sheet is arranged between the fan and the polarization conversion module, the shading sheet is fixedly connected with the cover plate, and the shading sheet is provided with a through hole for transmitting the wind blown by the fan.

Among them, the distance between the light shield and the polarization conversion is 4mm-7mm, and the distance between the fan and the cover plate is 8mm-12mm.

Wherein, the heat dissipation fins are integrally arranged with the first side plate, the second side plate or the bottom plate.

Wherein, the first side plate, the second side plate and the inner and outer sides of the bottom plate are provided with heat dissipation fins.

In order to solve the above technical problems, another technical solution adopted in this application is to provide a projector, which includes a light source and the polarization conversion system of any one of the above embodiments, the light source is used for emitting an illuminating light beam, and the polarization conversion system is used for Polarization conversion of the illumination beam.

The beneficial effect of the embodiments of the present application is that, different from the prior art, the polarization conversion system of the present application can improve the polarization conversion module by arranging the polarization conversion module in the sealed accommodating space formed by the housing. Dustproof effect; and radiating fins are arranged on the shell, which can enhance the heat dissipation performance of the system, thereby increasing the service life of the polarization conversion module.

Description of the drawings

FIG. 1 is a schematic structural diagram of an embodiment of a polarization conversion system according to the present application;

Figure 2 is a cross-sectional view of Figure 1;

Fig. 3 is a schematic structural diagram of an embodiment of a projector according to the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The dust-proof effect of the existing polarization conversion system is not ideal, which affects the overall performance and life of the projector. In order to solve the above technical problems, the present application provides a polarization conversion system that takes into account the performance of sealing dust and heat dissipation.

Please refer to FIG. 1, which is a schematic structural diagram of an embodiment of a polarization conversion system of the present application. The polarization conversion system includes a housing 1 and a polarization conversion module 2.

Specifically, the housing 1 is formed with a sealed accommodating space, and the polarization conversion module 2 is located in the accommodating space. Optionally, in this embodiment, according to the heat dissipation requirement of the polarization conversion module 2, the accommodating space can be set with different sealing levels. Specifically, the smaller the heat dissipation requirement, the higher the sealing level can be set. The higher the sealing level of the accommodating space, the better the dust-proof effect, while reducing noise pollution and improving the user experience. Wherein, the shape of the housing 1 can be square, round, oval, and the like. In order to facilitate placement, the shape of the housing 1 in this embodiment is square.

The material of the housing 1 may be metal to increase the heat dissipation performance of the polarization conversion system. When the polarization conversion module 2 generates a lot of heat, the accommodating space can also be set to a higher sealing level. In this case, other components can be added to coordinate heat dissipation. For example, heat dissipation fins 17 can be provided on the housing 1 to improve the heat dissipation performance. Among them, the heat dissipation fins 17 may be arranged on the inside of the housing 1, or on the outside of the housing 1, and may also be arranged on the inside and outside of the housing 1 at the same time.

In a specific embodiment, the housing 1 includes a bottom plate 15, a cover plate 16 disposed opposite to the bottom plate 15, a side plate located between the bottom plate 15 and the cover plate 16, and the bottom plate 15, the side plate and the cover plate 16 form the above The housing space.

The side panels include a first side panel 11, a second side panel 12, a third transparent side panel 13 and a fourth transparent side panel 14. The first side panel 11 and the second side panel 12 are arranged opposite to each other. At least one of the two side plates 12 and the bottom plate 15 is provided with heat dissipation fins 17. Wherein, the length direction of the heat dissipation fin 17 is kept parallel to the flow direction of the heat dissipation air duct. Preferably, the heat dissipation fins 17 are integrally provided with the first side plate 11, the second side plate 12 or the bottom plate 15. In this way, the manufacturing process can be simplified, and the stability of the housing 1 can be increased.

Specifically, heat dissipation fins 17 may be provided on any one of the first side plate 11, the second side plate 12, and the bottom plate 15, or any two of the first side plate 11, the second side plate 12, and the bottom plate 15 may be provided. The heat dissipation fins 17 are provided on the top. Preferably, heat dissipation fins 17 may be provided on the first side plate 11, the second side plate 12 and the bottom plate 15 to improve the heat dissipation performance.

The third transparent side plate 13 and the fourth transparent side plate 14 are disposed opposite to each other, and are used to transmit the incoming and outgoing light of the polarization conversion module 2. In a specific embodiment, the material of the third transparent side plate 13 and the fourth transparent side plate 14 is glass.

Further, the polarization conversion system further includes a fan 3, the fan 3 is located between the cover plate 16 and the polarization conversion module 2, and the fan 3 is installed on the cover plate 16. The fan 3 is used for blowing cold air to dissipate the polarization conversion module 2.

The housing 1 of this embodiment is a sealed structure, and the internal heat dissipation adopts an internal circulation air duct design. As shown in Figure 2, the dashed arrow in the figure is a schematic diagram of the route of the air duct. The cold air from the fan 3 blows to the polarization conversion module 2, taking away the heat on the polarization conversion module 2, and then exits the polarization conversion module 2. The hot air turns into cold air through the design of the heat dissipation fins 17 or the metal housing 1, and is sucked by the fan 3 and then blows to the polarization conversion module 2. This cycle is used to dissipate the polarization conversion module 2.

Preferably, a light-shielding sheet 4 can also be arranged between the fan 3 and the polarization conversion module 2, the light-shielding sheet 4 is fixedly connected to the cover plate 16, and the light-shielding sheet 4 is provided with a through hole for transmitting the wind blown by the fan 3. That is, the light-shielding sheet 4 only covers the outer frame of the fan 3 to avoid affecting the transmission of the cold air blown by the fan 3. The light-shielding sheet 4 can block the light aging of the fan 3 caused by the stray light in the accommodating space, and increase the service life of the fan 3.

As shown in FIG. 2, the distance between the light shielding film 4 and the polarization conversion module 2 is: 4mm-7mm, preferably 5mm, so that lower noise can be obtained, and high-frequency howling sound can be avoided because the distance is too small. The distance between the fan 3 and the cover plate 16 is 8mm-12mm, preferably 10mm, to facilitate ventilation.

Since the fan 3 has a power cord (not marked in the figure), in order to facilitate the storage of the power cord, a wire hole (not marked in the figure) is provided on the cover plate 16 for leading out the power cord of the fan 3. The cover plate 16 is also provided with a sealing silicone gasket 163 and a crimping plate 161. The sealing silicone gasket 163 and the crimping plate 161 are attached to the cable hole in turn. After the power cord of the fan 3 is drawn from the cable hole, it is sealed with silicone rubber. The gasket 163 fits and seals, and then the pressure line plate 161 is used to compress and seal the silicone gasket 163. In order to avoid crushing the power cord, the crimping plate 161 can be made of plastic.

Further, the crimping plate cover 162 can also be placed on the cover 16 to cover the crimping plate 161. The crimping plate cover 162 can be made of metal to increase the robustness of the housing 1 and improve the heat dissipation of the housing 1. effect.

Different from the prior art, the housing 1 of the polarization conversion system of this embodiment adopts a sealed design, which can increase the dust-proof effect, reduce noise pollution, and improve user experience. Providing the heat dissipation fins 17 on the housing 1 can increase the heat dissipation effect of the polarization conversion system and increase the service life of the polarization conversion system.

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of an embodiment of a projector of the present application. The projector 300 of the present application includes a light source 301 and a polarization conversion system 302.

The light source 301 is used to emit an illuminating light beam, and the polarization conversion system 302 is used to perform polarization conversion on the illuminating light beam. The polarization conversion system 302 is the polarization conversion system of any of the foregoing embodiments.

For the specific structure of the polarization conversion system 302, please refer to the drawings and text descriptions of the foregoing embodiments, which will not be repeated here.

Different from the state of the art, the polarization conversion system 302 in the projector 300 of this embodiment adopts a sealed housing mode, which can increase the dustproof effect and reduce noise pollution, and radiating fins on the housing can improve the polarization conversion system 302 The heat dissipation performance of the projector can improve the performance and service life of the projector 300.

The above is only the implementation of this application, and does not limit the scope of this application. Any equivalent structure or equivalent process transformation made using the content of the description and drawings of this application, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of this application.

Claims

A polarization conversion system, characterized in that the polarization conversion system includes:

A housing is formed with a sealed accommodating space, wherein heat dissipation fins are provided on the housing;

The polarization conversion module is located in the accommodating space.
The polarization conversion system according to claim 1, wherein the housing comprises a bottom plate; a cover plate disposed opposite to the bottom plate; and a side plate located between the bottom plate and the cover plate, the bottom plate , The side plate and the cover plate form the accommodating space,

The side panel includes a first side panel, a second side panel, a third transparent side panel, and a fourth transparent side panel. The first side panel and the second side panel are arranged opposite to each other. The first side panel, At least one of the second side plate and the bottom plate is provided with the heat dissipation fin; the third transparent side plate is arranged opposite to the fourth transparent side plate, and is used to transmit the polarization conversion module in and out Light.
3. The polarization conversion system according to claim 2, wherein the polarization conversion system further comprises a fan, and the fan is located between the cover plate and the polarization conversion module.
The polarization conversion system according to claim 3, wherein the cover plate is provided with a wire hole for leading out the power cord of the fan, and the cover plate is also provided with a sealing silicone gasket and a pressure wire The boards are sequentially attached to the wire-passing holes for attaching and sealing the power cord of the fan.
The polarization conversion system according to claim 4, wherein the pressure line plate is made of plastic material, and the cover plate is further provided with a pressure line plate cover plate, which is covered on the pressure line plate, and The crimping plate cover is made of metal.
The polarization conversion system according to claim 3, wherein a shading sheet is provided between the fan and the polarization conversion module, the shading sheet is fixedly connected to the cover plate, and the shading sheet is provided with The through hole is used to transmit the wind blown by the fan.
The polarization conversion system according to claim 6, wherein the distance between the shading plate and the polarization conversion is 4mm-7mm, and the distance between the fan and the cover plate is 8mm-12mm .
The polarization conversion system according to claim 2, wherein the heat dissipation fins are integrally provided with the first side plate, the second side plate or the bottom plate.
The polarization conversion system according to claim 2, wherein the first side plate, the second side plate and the inner and outer sides of the bottom plate are provided with the heat dissipation fins.
A projector, characterized in that the projector comprises a light source and the polarization conversion system according to any one of claims 1-9, the light source is used to emit an illumination beam, and the polarization conversion system is used to The illumination beam undergoes polarization conversion.