CN211086895U - High bright monolithic liquid crystal projector totally enclosed ray apparatus heat radiation structure - Google Patents

Abstract

The utility model discloses a fully sealed optical machine heat dissipation structure for a high-brightness single-chip liquid crystal projector. and lens, and also includes a cooling fan and a heat exchange radiator. The lens is arranged at the open end of the casing and is sealed with the casing. The inner cavity of the casing is divided into a first cavity and a second cavity by the first lens and the second lens. The cavity and the third cavity, the liquid crystal screen and the cooling fan are arranged in the third cavity, and the heat exchange radiator is closely attached to the outer wall of the casing and communicated with the third cavity. The high-brightness single-chip liquid crystal projector proposed by the utility model has a fully-sealed optical-mechanical heat-dissipating structure, and has good sealing performance and heat-dissipating energy, and can be designed according to different light source power and projection brightness requirements. A high-brightness fully-sealed projector with a variety of specifications meets the heat dissipation requirements of the optical-mechanical fully-sealed.

Description

A fully sealed optomechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector

technical field

The utility model relates to the field of single-chip projectors, and particularly discloses a fully-sealed light-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector.

Background technique

A single-chip LCD projector, that is, using a full-color TFT LCD screen as a light valve, with the help of a certain designed Kohler lighting system, is composed of a light source, a condenser, a front Fresnel lens, a LCD screen, a rear Fresnel lens and a lens. A projector that enlarges the image by projection. Since its launch in the late 1980s and early 1990s, it has been decades of history. Although it has undergone so many years of development, many deficiencies have been improved, such as volume, luminous flux output, appearance, color, and quality stability.

However, since the transmittance of the LCD screen is only 5-7% (depending on the manufacturer and model of the LCD screen), its efficiency is only 5-7%, and the remaining 93-95% of the light is all concentrated on the LCD screen and is absorbed by the LCD screen. The screen absorbs (about 1% of the light is reflected by the LCD screen), and it is reflected in the form of heat, which makes the temperature of the LCD screen very high. The fan must be forced to dissipate heat to ensure that the temperature of the LCD screen is lower than 80 degrees Celsius. Therefore, All optics, from the condenser to the lens, cannot be sealed against dust due to the need for ventilation. As a result, after the optical device has been used for a certain period of time, the deposited dust will seriously reduce the indicators of the projector. In severe cases, after a year of use (about 3000 hours), the optical performance is not as good as 1/5 of the new machine, and it is difficult to continue to use it. About half a month, the whole machine must be disassembled to remove dust from the optical components such as the LCD screen of the core imaging device, which leads to consumers losing confidence in the single-chip projector, because the maintenance is too cumbersome.

Therefore, the maintenance of the existing single-chip projector due to dust accumulation in the later use process is cumbersome, which is a technical problem to be solved urgently.

Utility model content

The utility model provides a single-chip liquid crystal projector fully sealed optical machine, which aims to solve the technical problem of cumbersome maintenance caused by dust accumulation in the later use process of the existing single-chip projector.

The utility model provides a fully sealed optical machine heat dissipation structure for a high-brightness single-chip liquid crystal projector, which comprises a casing with one end open, a condenser lens, a first lens, a liquid crystal screen, a second lens and The lens also includes a cooling fan and a heat exchange radiator. The lens is arranged at the open end of the casing and is sealed with the casing. The inner cavity of the casing is divided into a first cavity and a second cavity by the first lens and the second lens. The cavity and the third cavity, the liquid crystal screen and the cooling fan are arranged in the third cavity, and the heat exchange radiator is closely attached to the outer wall of the casing and communicated with the third cavity.

Further, a first ventilation channel is formed between the first lens and the liquid crystal screen, and a second ventilation channel is formed between the liquid crystal screen and the second lens; A ventilation channel and an air return groove of the second ventilation channel, the first ventilation channel, the air return groove and the second ventilation channel constitute a ventilation circuit.

Further, the cross section of the air recirculation groove is arc-shaped.

Further, the fully-sealed opto-mechanical heat dissipation structure of the high-brightness single-chip liquid crystal projector further includes a cold and hot air isolation sheet disposed on the ventilation circuit in the third cavity for separating the cold and hot air.

Further, the fully sealed optical machine heat dissipation structure of the high-brightness single-chip liquid crystal projector also includes a first reflecting mirror and a second reflecting mirror, the first reflecting mirror is arranged between the condenser mirror and the first lens; the second reflecting mirror is arranged between the second reflecting mirror and the second reflecting mirror. between the lens and the lens.

Further, the cross section of the casing is C-shaped, the condenser lens and the lens are co-located on one side of the casing, and the first reflecting mirror and the second reflecting mirror are co-located on the other side of the casing.

Further, the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are disposed toward the same side.

Further, the first reflector and the second reflector are arranged in a bell mouth shape.

Further, the first lens adopts a Fresnel lens, which is used to convert the light with the set angle reflected by the first reflecting mirror into nearly parallel light and irradiate the liquid crystal screen.

Further, the second lens adopts a Fresnel lens, which is used to collect the light emitted from the liquid crystal screen to the entrance of the lens.

The beneficial effects obtained by the utility model are:

The fully-sealed optical-mechanical heat dissipation structure of the high-brightness single-chip liquid crystal projector proposed by the utility model adopts a casing, a condenser lens, a first lens, a liquid crystal screen, a second lens, a lens, a cooling fan and a heat exchange radiator, which is consistent with the prior art. In contrast, the lens is sealed with the open end of the casing, which can be sealed and dustproof; a heat exchange radiator is added to the original air path, and all optical components are sealed and installed in a casing. When the light source Through the condenser lens and the first lens, the light that cannot be transmitted is converted into heat, and then the internal air is circulated through the internal cooling fan. When the heat is carried by the wind, 70% of the heat is transferred to the heat exchange radiator, thereby reducing the temperature of the internal circulating air. The outer side of the heat exchange radiator is designed at the strong flow tuyere of the room temperature environment, so that the flowing air can force the heat exchange radiator to cool down. After 2 heat exchanges, the temperature of the internal circulating air is slightly higher than the ambient temperature by about 20°C. The high-brightness single-chip liquid crystal projector proposed by the utility model has a fully-sealed optical-mechanical heat-dissipating structure, and has good sealing performance and heat-dissipating energy, and can be designed according to different light source power and projection brightness requirements. A high-brightness fully-sealed projector with a variety of specifications meets the heat dissipation requirements of the optical-mechanical fully-sealed.

Description of drawings

1 is a schematic structural diagram of an embodiment of a fully-sealed optical-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector provided by the present invention;

FIG. 2 is a schematic diagram of the heat dissipation principle of an embodiment of the fully sealed opto-mechanical heat dissipation structure of the high-brightness single-chip liquid crystal projector provided by the present invention.

Description of reference numbers:

10. Chassis; 20. Condenser lens; 30. First lens; 40. LCD screen; 50. Second lens; 60. Lens; 70. Cooling fan; 80. Heat exchange radiator; 11. First cavity; 12 , the second cavity; 13, the third cavity; 131, the first ventilation channel; 132, the second ventilation channel; 133, the air return groove; 134, the hot and cold air separator; 91, the first mirror; 92, second mirror.

specific implementation

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the present invention provides a fully sealed optical machine heat dissipation structure for a high-brightness single-chip liquid crystal projector, comprising a casing 10 with one end open, a condenser lens 20 arranged in the inner cavity of the casing 10 along the optical path, a first The lens 30 , the liquid crystal screen 40 , the second lens 50 and the lens 60 also include a cooling fan 70 and a heat exchange radiator 80 . The lens 60 is arranged at the open end of the casing 10 and is sealed with the casing 10 . The cavity is divided into a first cavity 11 , a second cavity 12 and a third cavity 13 by the first lens 30 and the second lens 50 . The liquid crystal screen 40 and the cooling fan 70 are arranged in the third cavity 13 for heat exchange and heat dissipation. The device 80 is closely attached to the outer wall of the casing 10 and communicates with the third cavity 13 . The heat exchange radiator 80 is used to transfer the heat inside the optical engine to the radiator through the cooling fan 70, and then take away the heat on the heat exchange radiator 80 through the external flowing wind, so as to reduce the internal temperature of the optical engine, so as to achieve The heat dissipation is completely isolated and sealed inside and outside the optical machine.

In the above structure, the first ventilation channel 131 is formed between the first lens 30 and the liquid crystal screen 40, and the second ventilation channel 132 is formed between the liquid crystal screen 40 and the second lens 50; The air return grooves 133 in the three cavities 13 are used to communicate the first ventilation channel 131 and the second ventilation channel 132. The first ventilation channel 131, the air return groove 133 and the second ventilation channel 132 constitute a ventilation circuit. Preferably, the cross section of the air recirculation groove 133 is arc-shaped. The fully sealed opto-mechanical heat dissipation structure of the high-brightness single-chip liquid crystal projector further includes a cold and hot air separator 134 disposed on the ventilation circuit in the third cavity 13 for separating the cold and hot air. Optionally, the fully sealed optical-mechanical heat dissipation structure of the high-brightness single-chip liquid crystal projector further includes a first reflection mirror 91 and a second reflection mirror 92, and the first reflection mirror 91 is arranged between the condenser lens 20 and the first lens 30; the second reflection mirror 91 The mirror 92 is provided between the second lens 50 and the lens 60 .

Preferably, referring to FIG. 1 and FIG. 2 , the high-brightness single-chip liquid crystal projector provided by the present embodiment provides a fully-sealed optical-mechanical heat dissipation structure, the cross-section of the casing 10 is C-shaped, and the condenser lens 20 and the lens 60 are arranged on the same side of the casing 10 . On one side, the first reflecting mirror 91 and the second reflecting mirror 92 are both disposed on the other side of the casing 10 . The reflection surfaces of the first reflection mirror 91 and the second reflection mirror 92 are disposed toward the same side. The first reflector 91 and the second reflector 92 are provided in a bell mouth shape. In this embodiment, the cross-section of the casing is C-shaped, which saves space, reduces the volume of the opto-mechanical machine, and effectively utilizes the space for heat dissipation, making product design more compact and reducing product packaging and transportation costs. Preferably,

The first lens 30 adopts a Fresnel lens, which is used to convert the light with a set angle reflected by the first reflecting mirror 91 into nearly parallel light and irradiate the liquid crystal panel 40 . The second lens 50 adopts a Fresnel lens, and is used for collecting the light emitted from the liquid crystal screen 40 to the entrance of the lens 60 . The lens 60 adopts three concave-convex lenses for projecting the content displayed on the liquid crystal screen 40 onto the screen.

Please refer to Fig. 1 and Fig. 2. The high-brightness single-chip liquid crystal projector provided by the present embodiment provides a fully sealed opto-mechanical heat dissipation structure, and its working principle is as follows:

A heat exchange radiator 80 is added to the original air duct, and all optical components are sealed and installed in a casing 10. When the light source is projected onto the liquid crystal screen 40 through the condenser lens 20 and the first lens 30, it cannot pass through. The light is converted into heat, and then the internal air circulation is driven by the internal cooling fan 70. When the hot air after cooling the liquid crystal screen 40 is forced to blow to the inside of the heat exchange radiator 80, 70% of the heat carried by the wind is transferred to the heat exchange. on the radiator 80, thereby reducing the temperature of the internal circulating air. The outer side of the heat exchange radiator 80 is designed at a strong flow tuyere in a room temperature environment, so that the flowing wind can force the heat exchange radiator 80 to cool down. After 2 heat exchanges, the temperature of the internal circulating air is slightly higher than the ambient temperature by about 20°C. Among them, the area and shape of the heat exchange radiator 80 increase the heat dissipation area and shape according to the optical bodies of different powers, so as to meet the requirements of different types of sealed optical bodies, and at the same time fully seal the optical devices.

The high-brightness single-chip LCD projector provided in this embodiment has a fully sealed optical-mechanical heat dissipation structure. When the ambient temperature is maintained at 33 degrees Celsius for a long time, the power of the light source is less than 150W, the total luminous flux of the light source is less than 15,000 lumens, and the design efficiency of the lighting system is equal. Regardless of this part of the heat, the maximum temperature measured by the LCD screen is not higher than 60 degrees, which is already within the actual allowable working range of the LCD screen, so that the optical machine can be completely sealed, dust is eliminated, and the projector can be used. Maintenance cycle extend.

While the preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of this invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (10)

1. A high-brightness single-chip liquid crystal projector fully sealed optical machine heat dissipation structure, characterized in that it comprises a casing (10) with one end open, and a condenser (20) sequentially arranged in the inner cavity of the casing (10) along the optical path. ), a first lens (30), a liquid crystal screen (40), a second lens (50) and a lens (60), further comprising a cooling fan (70) and a heat exchange radiator (80), the lens (60) is provided with At the open end of the casing (10) and sealed with the casing (10), the inner cavity of the casing (10) is covered by the first lens (30) and the second lens (50) ) is divided into a first cavity (11), a second cavity (12) and a third cavity (13), the liquid crystal screen (40) and the cooling fan (70) are arranged in the third cavity In (13), the heat exchange radiator (80) is closely attached to the outer wall of the casing (10) and communicates with the third cavity (13). 2. The fully-sealed optomechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 1, wherein a first ventilation channel is formed between the first lens (30) and the liquid crystal screen (40) (131), a second ventilation channel (132) is formed between the liquid crystal screen (40) and the second lens (50); 13) An air return groove (133) for connecting the first ventilation channel (131) and the second ventilation channel (132), the first ventilation channel (131), the air return groove (133) ) and the second ventilation channel (132) constitute a ventilation circuit. 3. The fully-sealed opto-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 2, wherein the cross section of the air recirculation groove (133) is arc-shaped. 4. The fully-sealed opto-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 2, further comprising a ventilation circuit arranged in the third cavity (13) for separating cold and heat Hot and cold air spacer (134) for wind. 5. The fully-sealed optical-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 1, further comprising a first reflecting mirror (91) and a second reflecting mirror (92), the first reflecting mirror (92). A mirror (91) is arranged between the condenser lens (20) and the first lens (30); the second reflecting mirror (92) is arranged between the second lens (50) and the lens (60) between. 6. The fully sealed opto-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 5, wherein the cross section of the casing (10) is C-shaped, and the condenser lens (20) and the lens are (60) are co-located on one side of the casing (10), and the first reflecting mirror (91) and the second reflecting mirror (92) are co-located on the other side of the casing (10). . 7. The fully-sealed opto-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 5 or 6, characterized in that the reflection of the first reflector (91) and the second reflector (92) Set with faces facing the same side. 8. The fully-sealed opto-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 5 or 6, wherein the first reflector (91) and the second reflector (92) are horns Mouth setting. 9. The fully-sealed optical-mechanical heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 5 or 6, wherein the first lens (30) is a Fresnel lens, which is used to The reflection mirror (91) reflects the light with a set angle and converts it into a nearly parallel light to irradiate on the liquid crystal screen (40). 10. The fully sealed optical machine heat dissipation structure for a high-brightness single-chip liquid crystal projector according to claim 5 or 6, wherein the second lens (50) adopts a Fresnel lens, which is used to convert the liquid crystal screen The light emitted from (40) is collected into the entrance of the lens (60).

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