Projector with light leakage prevention heat dissipation structure

Abstract

The utility model discloses a projector with a light leakage prevention heat dissipation structure, which comprises a light machine shell, a fan, an LED light source, a light hopper, a Fresnel lens, heat insulation glass, an LCD light valve, a field lens, an imaging reflector and a projection lens, a first heat dissipation air channel is formed between the Fresnel lens and the heat insulation glass, a second heat dissipation air channel is formed between the heat insulation glass and the LCD light valve, and a third heat dissipation air channel is formed between the LCD light valve and the field lens. An air outlet of the first heat dissipation air duct is formed by alternately arranging a first flow guide plate and a second flow guide plate, and an S-shaped curve is formed between the first flow guide plate and the second flow guide plate. By improving the structures of the air outlets of the first heat dissipation air duct, the second heat dissipation air duct and the third heat dissipation air duct, the problem of light leakage caused by diffuse reflection of light is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, in particular to a projector with a light leakage prevention and heat dissipation structure. Background Art

[0002] According to a high-efficiency heat dissipation device and projector disclosed in patent No. CN202221401939.5, its optical system includes an LED light source, a condenser, a condensing collimating lens, a heat-insulating glass, an LCD light valve, a field lens, an imaging reflector and a projection lens arranged in sequence according to the direction of light travel, wherein a heat dissipation duct is formed between the condensing collimating lens and the heat-insulating glass, between the heat-insulating glass and the LCD light valve, and between the LCD light valve and the field lens; the LED light source is connected to a plurality of fins via a metal plate and a heat pipe, and a fan blows air to the air inlet of the heat dissipation duct, and blows the heat generated by the LCD light valve to the plurality of fins through the air outlet of the heat dissipation duct, and an arc guide section is provided on the fin, so that the hot air turns after passing through the arc guide section and blows out in a direction away from the LED light source, and then is discharged from the air outlet of the projector housing. Its technical solution minimizes the size of the projector while ensuring the heat dissipation conditions. However, in the above patented technology, after the light emitted by the LED light source passes through the condenser, condenser collimator lens, heat-insulating glass, LCD light valve and field lens in sequence, the light will be diffusely reflected in the heat dissipation duct, and eventually part of the light will be emitted from the air outlet of the projector housing, causing light leakage, affecting the user experience. Therefore, how to minimize the light from being diffusely reflected in the heat dissipation duct and emitted from the air outlet of the projector housing while ensuring the heat dissipation conditions, causing light leakage, is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a projector with an anti-light leakage heat dissipation structure. The present invention effectively avoids the problem of light leakage caused by diffuse reflection of light by improving the structures of the air outlets of the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct.

[0004] To achieve the above-mentioned purpose, the utility model provides a projector with a light leakage prevention and heat dissipation structure, comprising an optical machine housing, a fan, and an LED light source, a light bucket, a mirror, a heat-insulating glass, an LCD light valve, a field lens, an imaging reflector and a projection lens arranged in sequence according to the direction of light travel, the optical machine housing is provided with a light source installation port and a lens installation port, the LED light source and the projection lens are respectively installed at the light source installation port and the lens installation port, and the light bucket, the mirror, the heat-insulating glass, the LCD light valve, the field lens, the imaging reflector and the fan are installed in the optical machine housing;

[0005] A first heat dissipation duct, a second heat dissipation duct and a third heat dissipation duct are respectively formed between the Philips mirror and the heat-insulating glass, between the heat-insulating glass and the LCD light valve, and between the LCD light valve and the field lens; the air inlets of the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct are opposite to the position of the fan; the fan blows air to the air inlets of the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct, and blows out the heat generated by the LCD light valve through the air outlets of the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct;

[0006] The air outlet of the first heat dissipation air duct is formed by alternately arranging a first guide plate and a second guide plate, and an S-shaped bend is formed between the first guide plate and the second guide plate;

[0007] The air outlet of the second heat dissipation air duct is formed by alternately arranging a second guide plate and a third guide plate, a C-shaped bend is formed between the second guide plate and the third guide plate, and an end of the third guide plate close to the LCD light valve is inclined toward the air outlet of the third heat dissipation air duct;

[0008] The air outlet of the third heat dissipation air duct is formed by alternately arranging a third guide plate and a fourth guide plate, a C-shaped bend is formed between the third guide plate and the fourth guide plate, and an end of the fourth guide plate close to the field lens is flush with the field lens.

[0009] Beneficial effects of the utility model: the fan of the utility model blows air to the air inlets of the first heat dissipation air duct, the second heat dissipation air duct and the third heat dissipation air duct, blows out the heat generated by the LCD light valve through the air outlets of the first heat dissipation air duct, the second heat dissipation air duct and the third heat dissipation air duct, and then discharges it from the air outlet of the projector housing to achieve heat dissipation of the LCD light valve.

[0010] The light emitted by the LED light source passes through the light bucket, the mirror, the heat-insulating glass, the LCD light valve and the field mirror in sequence, and the light will be diffusely reflected in the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct, wherein the light in the first heat dissipation duct is the strongest among the first heat dissipation duct, the second heat dissipation duct and the third heat dissipation duct, and the light in the second heat dissipation duct and the third heat dissipation duct is weakened in sequence. The utility model designs an S-shaped bend at the air outlet of the first heat dissipation duct to effectively reduce the diffuse reflection of light. At the same time, the air outlet of the second heat dissipation duct is designed with a C-shaped bend, and the end of the third guide plate close to the LCD light valve is inclined toward the air outlet of the third heat dissipation duct, that is, the end of the third guide plate close to the LCD light valve is not flush with the LCD light valve, and the second guide plate makes a concave structure in the second heat dissipation duct, which effectively reduces the diffuse reflection of light in the second heat dissipation duct. In addition, since the end of the third guide plate close to the LCD light valve is inclined toward the air outlet of the third heat dissipation air duct, the side of the air outlet of the third heat dissipation air duct close to the field lens is reduced, which reduces the diffuse reflection of light to a certain extent, and the light in the third heat dissipation air duct itself is relatively weak. Therefore, the utility model effectively avoids the problem of light leakage caused by diffuse reflection of light in the first heat dissipation air duct, the second heat dissipation air duct and the third heat dissipation air duct and emitting from the air outlet of the projector housing by improving the structure of the air outlet of the first heat dissipation air duct, the second heat dissipation air duct and the third heat dissipation air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a cross-sectional view of the utility model.

[0013] The above reference numerals:

[0014] 1. Projector housing; 2. Optical machine housing; 3. LED light source; 4. Light bucket; 5. Mirror; 6. Heat-insulating glass; 7. LCD light valve; 8. Field lens; 9. Imaging reflector; 10. Projection lens; 11. Cooling fan; 12. Radiator; 100. First cooling air duct; 200. Second cooling air duct; 300. Third cooling air duct; 13. First guide plate; 14. Second guide plate; 15. Third guide plate; 16. Fourth guide plate. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0016] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0017] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0018] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Embodiment:

[0021] See also Figure 1As shown, the present embodiment provides a projector with an anti-light leakage and heat dissipation structure, comprising an optical machine housing 2, a fan 11, and an LED light source 3, a light bucket 4, a mirror 5, an insulating glass 6, an LCD light valve 7, a field lens 8, an imaging reflector 9 and a projection lens 10 which are arranged in sequence according to the direction of light travel. The optical machine housing 2 is provided with a light source mounting port and a lens mounting port, the LED light source 3 and the projection lens 10 are respectively mounted at the light source mounting port and the lens mounting port, and the light bucket 4, the mirror 5, the insulating glass 6, the LCD light valve 7, the field lens 8, the imaging reflector 9 and the fan 11 are installed in the optical machine housing 2.

[0022] A first heat dissipation duct 100, a second heat dissipation duct 200 and a third heat dissipation duct 300 are respectively formed between the Philips mirror 5 and the insulating glass 6, between the insulating glass 6 and the LCD light valve 7, and between the LCD light valve 7 and the field lens 8; the air inlets of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300 are opposite to the fan 11; the fan 11 blows air to the air inlets of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300, and blows out the heat generated by the LCD light valve 7 through the air outlets of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300.

[0023] The air outlet of the first heat dissipation duct 100 is formed by the alternating arrangement of the first guide plate 13 and the second guide plate 14, and an S-shaped bend is formed between the first guide plate 13 and the second guide plate 14; the air outlet of the second heat dissipation duct 200 is formed by the alternating arrangement of the second guide plate 14 and the third guide plate 15, a C-shaped bend is formed between the second guide plate 14 and the third guide plate 15, and an end of the third guide plate 15 close to the LCD light valve 7 is inclined toward the air outlet of the third heat dissipation duct 300; the air outlet of the third heat dissipation duct 300 is formed by the alternating arrangement of the third guide plate 15 and the fourth guide plate 16, a C-shaped bend is formed between the third guide plate 15 and the fourth guide plate 16, and an end of the fourth guide plate 16 close to the field lens 8 is flush with the field lens 8.

[0024] The projector of this embodiment of course also includes a projector housing 1, and a plurality of fins 12 for heat dissipation of the LED light source 3 (see the detailed description in patent number CN202221401939.5), etc., wherein the optical machine housing 2, fan 11, LED light source 3, light bucket 4, mirror 5, insulating glass 6, LCD light valve 7, field lens 8, imaging reflector 9, projection lens 10 and the plurality of fins 12 are all located in the projector housing 1, which is a conventional configuration structure of the projector and is a prior art, so it will not be elaborated in detail.

[0025] In this embodiment, the fan 11 blows air to the air inlets of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300, blows out the heat generated by the LCD light valve 7 through the air outlets of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300, and then discharges it from the air outlet of the projector housing 1, so as to achieve heat dissipation of the LCD light valve 7.

[0026] The light emitted by the LED light source 3 passes through the light bucket 4, the mirror 5, the heat-insulating glass 6, the LCD light valve 7 and the field lens 8 in sequence, and the light is diffusely reflected in the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300. Among the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300, the light in the first heat dissipation duct 100 is the strongest, and the light in the second heat dissipation duct 200 and the third heat dissipation duct 300 is weakened in sequence. In this embodiment, an S-shaped bend is designed at the air outlet of the first heat dissipation duct 100 to effectively reduce diffuse reflection of light. At the same time, the air outlet of the second heat dissipation duct 200 is designed with a C-shaped bend, and the end of the third guide plate 15 close to the LCD light valve 7 is inclined toward the air outlet of the third heat dissipation duct 300, that is, the end of the third guide plate 15 close to the LCD light valve 7 is not flush with the LCD light valve 7, and the second guide plate 14 makes a recessed structure in the second heat dissipation duct 200, which effectively reduces the diffuse reflection of light in the second heat dissipation duct 200.

[0027] In addition, since the end of the third guide plate 15 close to the LCD light valve 7 is inclined toward the air outlet of the third heat dissipation duct 300, the side of the air outlet of the third heat dissipation duct 300 close to the field lens 8 is reduced, which reduces the diffuse reflection of light to a certain extent, and the light in the third heat dissipation duct 300 itself is relatively weak. Therefore, this embodiment improves the structure of the air outlet of the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300, and effectively avoids the problem of light leakage caused by diffuse reflection of light in the first heat dissipation duct 100, the second heat dissipation duct 200 and the third heat dissipation duct 300 and emitting from the air outlet of the projector housing 1.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A projector with a light leakage prevention and heat dissipation structure, It is characterized in that The invention comprises an optical machine housing (2), a fan (11), and an LED light source (3), a light bucket (4), a mirror (5), a heat-insulating glass (6), an LCD light valve (7), a field lens (8), an imaging reflector (9), and a projection lens (10) which are arranged in sequence according to the direction of light travel; the optical machine housing (2) is provided with a light source mounting port and a lens mounting port; the LED light source (3) and the projection lens (10) are respectively mounted at the light source mounting port and the lens mounting port; and the light bucket (4), the mirror (5), the heat-insulating glass (6), the LCD light valve (7), the field lens (8), the imaging reflector (9), and the fan (11) are mounted in the optical machine housing (2); A first heat dissipation duct (100), a second heat dissipation duct (200) and a third heat dissipation duct (300) are respectively formed between the mirror (5) and the heat-insulating glass (6), between the heat-insulating glass (6) and the LCD light valve (7), and between the LCD light valve (7) and the field lens (8); air inlets of the first heat dissipation duct (100), the second heat dissipation duct (200) and the third heat dissipation duct (300) are located opposite to the fan (11); the fan (11) blows air to the air inlets of the first heat dissipation duct (100), the second heat dissipation duct (200) and the third heat dissipation duct (300), so as to blow out the heat generated by the LCD light valve (7) through the air outlets of the first heat dissipation duct (100), the second heat dissipation duct (200) and the third heat dissipation duct (300); The air outlet of the first heat dissipation air duct (100) is formed by alternately arranging a first guide plate (13) and a second guide plate (14), and an S-shaped bend is formed between the first guide plate (13) and the second guide plate (14); The air outlet of the second heat dissipation air duct (200) is formed by alternately arranging a second guide plate (14) and a third guide plate (15), a C-shaped bend is formed between the second guide plate (14) and the third guide plate (15), and an end of the third guide plate (15) close to the LCD light valve (7) is inclined toward the air outlet of the third heat dissipation air duct (300); The air outlet of the third heat dissipation air duct (300) is formed by alternately arranging a third guide plate (15) and a fourth guide plate (16), a C-shaped bend is formed between the third guide plate (15) and the fourth guide plate (16), and an end of the fourth guide plate (16) close to the field lens (8) is flush with the field lens (8).

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