CN211348968U - A polarization conversion system and projector - Google Patents

Abstract

The application discloses a polarization conversion system and a projector. The polarization conversion system includes: the heat dissipation device comprises a shell, a heat dissipation plate and a heat dissipation plate, wherein a sealed accommodating space is formed on the shell; and the polarization conversion module is positioned in the accommodating space. This application can improve the dustproof effect of polarization conversion module through making polarization conversion module be located the accommodation space, and sets up radiating fin on the shell, can strengthen polarization conversion system's heat dispersion to can improve system's life.

Description

A polarization conversion system and projector

technical field

The present application relates to the technical field of heat dissipation of optical components, 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.

In long-term research and development, the inventors of the present application found that in order to meet the heat dissipation requirements of the polarization conversion system, the design of the prior art is an open type, that is, the shell of the polarization conversion system has two openings, and a fan is installed in one opening, and the polarization conversion system has two openings. The inside of the conversion system module is ventilated, and the other opening is ventilated. The disadvantage of this design is very obvious. When the projector is in a dusty environment, dust will accumulate on the surface of the polarization conversion system. Even if the whole machine has an initial dustproof design, it still cannot prevent the entry of fine dust particles. The surface of the polarization conversion system mirror will collect a lot of dust. When the strong light comes, it will cause the dust to be heated. When the temperature of the dust rises to a certain level, the mirror surface of the polarization conversion system will be broken due to high temperature, resulting in abnormality of the polarization conversion system module, and finally the light output effect of the whole machine will be abnormal, which will affect the 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 also enhance its heat dissipation performance.

In order to solve the above-mentioned technical problems, a technical solution adopted in the present application is: to provide a polarization conversion system, the polarization conversion system includes: a casing formed with a sealed accommodating space, wherein the casing is provided with heat dissipation fins; The module is located in the accommodating space.

Wherein, the shell includes a bottom plate; a cover plate 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 a accommodating space, and the side plate includes a first side plate and a second side plate , a third transparent side plate, a fourth transparent side plate, the first side plate and the second side plate are arranged oppositely, and at least one of the first side plate, the second side plate and the bottom plate is provided with a cooling fin; 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 drawing out the power cord of the fan, and a sealing silicone gasket and a wire pressure plate are also arranged on the cover plate, which are attached to the wire hole in turn and used for the power cord of the fan. Fit seal.

Wherein, the line pressing plate is made of plastic material, and the cover plate is also provided with a line pressing plate cover, which is covered on the line pressing plate, and the line pressing 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 a through hole is arranged on the shading sheet 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 provided with the first side plate, the second side plate or the bottom plate.

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

In order to solve the above-mentioned technical problem, another technical solution adopted in the present application is to provide a projector, the projector includes a light source and the polarization conversion system of any of the above-mentioned embodiments, the light source is used for emitting an illumination beam, and the polarization conversion system is used for Polarization conversion of the illumination beam.

The beneficial effects of the embodiments of the present application are: different from the situation in 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 accommodation space formed by the housing. Dust-proof effect; and heat dissipation fins are arranged on the shell, which can enhance the heat dissipation performance of the system, thereby improving the service life of the polarization conversion module.

Description of drawings

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

Fig. 2 is the sectional view of Fig. 1;

FIG. 3 is a schematic structural diagram of an embodiment of the projector of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The dustproof 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-mentioned technical problems, the present application provides a polarization conversion system that takes into account the performance of sealing and dustproofing and heat dissipation.

Please refer to FIG. 1 . FIG. 1 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 forms a sealed accommodating space, and the polarization conversion module 2 is located in the accommodating space. Optionally, in this embodiment, different sealing levels can be set for the accommodating space according to the heat dissipation requirements of the polarization conversion module 2 . 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 dustproof effect, and at the same time, it can reduce noise pollution and improve the user experience. Wherein, the shape of the housing 1 can be square, circular, oval, or the like. For the convenience of placement, the shape of the housing 1 in this embodiment is square.

The material of the housing 1 can be metal, so as 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 cooperate with the heat dissipation. For example, heat dissipation fins 17 may be provided on the housing 1 to improve heat dissipation performance. Wherein, the heat dissipation fins 17 may be arranged on the inner side of the casing 1 , or may be arranged on the outer side of the casing 1 , and may also be arranged on the inner side and the outer side of the casing 1 at the same time.

In a specific embodiment, the housing 1 includes a bottom plate 15, a cover plate 16 opposite to the bottom plate 15, and a side plate located between the bottom plate 15 and the cover plate 16. The bottom plate 15, the side plate and the cover plate 16 form the above-mentioned accommodating 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 . The longitudinal direction of the heat dissipation fins 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 casing 1 can be increased.

Specifically, the 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 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 is disposed opposite to the fourth transparent side plate 14 for transmitting 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 to blow out cold air to dissipate heat from the polarization conversion module 2 .

The casing 1 of this embodiment is of a sealed structure, and the internal heat dissipation adopts the design of the internal circulation air duct. 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 towards the polarization conversion module 2, takes away the heat on the polarization conversion module 2, and passes through the polarization conversion module 2. The hot air changes into cold air through the design of the heat dissipation fins 17 or the metal casing 1 , and is sucked by the fan 3 and then blown toward the polarization conversion module 2 . This cycle is used to dissipate heat to the polarization conversion module 2 .

Preferably, a shading sheet 4 can also be arranged between the fan 3 and the polarization conversion module 2 , the shading sheet 4 is fixedly connected with the cover plate 16 , and the shading sheet 4 is provided with through holes for transmitting the wind blown by the fan 3 . That is, the light shielding sheet 4 only shields 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 accommodation space, and improve the service life of the fan 3 .

As shown in FIG. 2 , the distance between the light shielding sheet 4 and the polarization conversion module 2 is 4mm-7mm, preferably 5mm, so as to obtain lower noise and avoid high-frequency whistling due to too small distance. 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 drawing out the power cord of the fan 3 . The cover plate 16 is also provided with a sealing silicone gasket 163 and a pressure plate 161. The sealing silicone gasket 163 and the pressure plate 161 are attached to the wire hole in turn. After the power cord of the fan 3 is drawn out from the wire hole, the sealing silicone The gasket 163 is fitted and sealed, and then the pressing plate 161 is used to press and seal the silicone gasket 163 . In order to avoid crushing the power cord, the wire pressing plate 161 can be made of plastic.

Further, a pressure plate cover 162 can also be placed on the cover plate 16 and covered on the pressure plate 161 , and the pressure plate cover 162 can be made of metal material to increase the rigidity of the casing 1 and improve the heat dissipation of the casing 1 Effect.

Different from the situation in the prior art, the casing 1 of the polarization conversion system of the present embodiment adopts a sealed design, which can increase the dustproof effect, reduce noise pollution, and improve user experience. Disposing the heat dissipation fins 17 on the housing 1 can increase the heat dissipation effect of the polarization conversion system and improve the service life of the polarization conversion system.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a projector according to an embodiment 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 for emitting an illumination beam, and the polarization conversion system 302 is used for polarization conversion of the illumination beam. The polarization conversion system 302 is the polarization conversion system of any of the above-mentioned embodiments.

For the specific structure of the polarization conversion system 302, please refer to the drawings and descriptions of the above-mentioned embodiments, and details are not repeated here.

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

The above description is only an embodiment of the present application, and is not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (10)

1. A polarization conversion system, comprising:

the heat dissipation device comprises a shell, a heat dissipation plate and a heat dissipation plate, wherein a sealed accommodating space is formed on the shell;

and the polarization conversion module is positioned in the accommodating space.

2. The polarization conversion system of claim 1, wherein the housing comprises a backplane; the cover plate is arranged opposite to the bottom plate; and a side plate positioned between the bottom plate and the cover plate, wherein the bottom plate, the side plate and the cover plate form the accommodating space,

the side plates comprise a first side plate, a second side plate, a third transparent side plate and a fourth transparent side plate, the first side plate and the second side plate are arranged oppositely, and at least one of the first side plate, the second side plate and the bottom plate is provided with the radiating fins; the third transparent side plate and the fourth transparent side plate are arranged oppositely and used for transmitting light rays entering and exiting the polarization conversion module.

3. The polarization conversion system of claim 2, further comprising a fan located between the cover plate and the polarization conversion module.

4. The polarization conversion system according to claim 3, wherein the cover plate is provided with a wire hole for leading out a power line of the fan, and the cover plate is further provided with a sealing silica gel gasket and a wire pressing plate which are sequentially attached to the wire hole for attaching and sealing the power line of the fan.

5. The polarization conversion system according to claim 4, wherein the wire pressing plate is made of plastic, a wire pressing plate cover plate is further disposed on the cover plate and covers the wire pressing plate, and the wire pressing plate cover plate is made of metal.

6. The polarization conversion system according to claim 3, wherein a light shielding plate is disposed between the fan and the polarization conversion module, the light shielding plate is fixedly connected to the cover plate, and a through hole is disposed on the light shielding plate for transmitting wind blown by the fan.

7. The polarization conversion system of claim 6, wherein 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-12 mm.

8. The polarization conversion system of claim 2, wherein the heat sink fin is integrally provided with the first side plate, the second side plate, or the base plate.

9. The polarization conversion system according to claim 2, wherein the heat dissipation fins are provided on both inner and outer sides of the first side plate, the second side plate, and the bottom plate.

10. A projector comprising a light source for emitting an illumination beam and a polarization conversion system according to any one of claims 1 to 9 for polarization converting the illumination beam.

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