High-efficiency heat-dissipation direct-projection type open optical machine and LCD (Liquid Crystal Display) projector

Abstract

The utility model relates to a high-efficiency heat-dissipation direct-projection type open light machine and an LCD projector. The direct-projection type open light machine comprises a shell, an optical device, a heat dissipation fan, a light source module and a light source radiator. An optical cavity and a fan cavity which are communicated through an air vent are formed in the shell, and an air inlet communicated to the optical cavity and an air outlet communicated to the fan cavity are formed in the outer side of the shell; the optical device comprises an LCD screen; the cooling fan is arranged in the fan cavity; the light source module is arranged in the shell; the light source radiator is arranged on the outer side of the shell and located at the exhaust port. A first-stage dustproof structure is further arranged on the outer side of the shell. According to the direct-projection open ray machine, the first-stage dustproof structure is arranged on the air inlet path of the air inlet to remove dust in the air, so that the influence of dust in the air on the LCD screen is effectively prevented, black spots of the LCD screen are avoided, the overall projection effect is ensured, the user experience is improved, the first-stage dustproof structure is reasonable in structural design, and the service life of the LCD screen is prolonged. And the dustproof effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of LCD projectors, in particular to a direct-projection open light machine with efficient heat dissipation and an LCD projector. Background Art

[0002] At present, since users are not satisfied with the existing projector form, a direct projection optical path design has been proposed. The LCD projector form has been changed from the traditional square to a straight tube form, and the brightness will also increase due to the lack of a reflector. For this reason, the heat of the direct projection LCD light machine will be much greater than that of the traditional LCD light machine. The LCD light machine is divided into open and closed types. The closed light machine meets the dustproof effect while also increasing the burden on the heat dissipation system. Although the open light machine has a better heat dissipation effect, the space for accommodating the LCD screen is connected to the external atmosphere, which causes the floating dust in the air to easily follow the fresh air into the light machine and adsorb on the LCD screen, causing black spots to appear on the projected image. The appearance of black spots on the LCD screen due to dust adhesion is a problem that needs to be solved urgently for open light machines. Therefore, it is necessary to propose a direct projection open light machine with better dustproof effect. Utility Model Content

[0003] Based on this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a direct projection open light machine and LCD projector with efficient heat dissipation.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A direct projection open light machine with high efficiency heat dissipation, comprising:

[0006] Housing, optical device, heat dissipation fan, light source module and light source heat sink;

[0007] An optical cavity and a fan cavity connected through a vent are formed inside the housing, and an air inlet connected to the optical cavity and an air outlet connected to the fan cavity are arranged on the outside of the housing;

[0008] The optical device is arranged in the optical cavity, and the optical device comprises an LCD screen, and the LCD screen is located between the air inlet and the air vent;

[0009] The heat dissipation fan is arranged in the fan cavity;

[0010] The light source module is arranged in the housing and is used to provide light source to the LCD screen;

[0011] The light source heat sink is arranged outside the housing and located at the exhaust port, and the light source heat sink is used to dissipate heat from the light source module;

[0012] Among them, a primary dust-proof structure is also provided on the outside of the shell, and the primary dust-proof structure is used to remove dust from the air flowing into the air inlet. The primary dust-proof structure includes a plurality of wind shields arranged at intervals, and the gap between two adjacent wind shields can allow air to flow through, and the surface of the wind shield is provided with dust-sticking glue.

[0013] The direct projection open optical machine of the embodiment of the present application removes dust from the air by setting a first-level dustproof structure on the air inlet path of the air inlet, thereby effectively preventing the dust in the air from affecting the LCD screen, avoiding the appearance of black spots on the LCD screen, ensuring the overall projection effect, and being conducive to improving the user experience. The first-level dustproof structure is reasonably designed and has a good dustproof effect. On the other hand, the internal structure of the optical machine is reasonably arranged, which can effectively ensure the heat dissipation of the LCD screen while effectively cooling the light source radiator, so that the light source radiator can effectively dissipate the heat of the light source module, thereby increasing the life of the entire machine.

[0014] As an implementation manner, the wind shield is arranged to be inclined relative to the air intake path of the air intake port.

[0015] As an embodiment, a secondary dustproof structure is further provided on the outer side of the shell, and the secondary dustproof structure is used to remove dust from the air flowing into the air inlet, and the secondary dustproof structure is provided at the air inlet;

[0016] Compared with the secondary dustproof structure, the primary dustproof structure is farther away from the air inlet.

[0017] As an embodiment, the secondary dustproof structure is an arc-shaped air guide shell, and openings are provided at both ends of the arc-shaped air guide shell, wherein the opening at one end of the arc-shaped air guide shell faces the primary dustproof structure, and the opening at the other end is connected to the air inlet;

[0018] The inner wall of the arc-shaped air guide shell is also provided with dust-sticking glue.

[0019] As an implementation manner, auxiliary heat dissipation holes are further provided on the shell, and the fan cavity is connected to the outside through the auxiliary heat dissipation holes.

[0020] As an embodiment, the optical device further includes a first Fresnel lens, a heat-insulating glass, and a second Fresnel lens. The first Fresnel lens, the heat-insulating glass, the LCD screen, and the second Fresnel lens are arranged in sequence along the optical path. A first heat dissipation channel is formed between the first Fresnel lens and the heat-insulating glass, a second heat dissipation channel is formed between the heat-insulating glass and the LCD screen, and a third heat dissipation channel is formed between the LCD screen and the second Fresnel lens. The first heat dissipation channel, the second heat dissipation channel, and the third heat dissipation channel are all connected to the air inlet and the air vent.

[0021] As an implementation manner, the light source module includes an LED light source and a light funnel, the light emitted by the LED light source passes through the light funnel and then enters the first Fresnel lens, and the light source heat sink is disposed at the back of the LED light source.

[0022] As an implementation manner, the direct projection open light machine further includes a projection module, and the projection module is disposed on the light-emitting side of the second Fresnel lens, and the light emitted from the second Fresnel lens directly passes through the projection module and then is emitted.

[0023] As an implementation manner, the heat dissipation fan is a turbine fan.

[0024] An LCD projector comprises: the direct projection open light machine as described above.

[0025] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a direct-projection open optical machine from one viewing angle in an embodiment of the present application;

[0027] Figure 2 This is a schematic structural diagram of another perspective of the direct projection open optical machine in the embodiment of the present application;

[0028] Figure 3 This is a schematic structural diagram of another perspective of the direct projection open optical machine in the embodiment of the present application;

[0029] Figure 4 This is a schematic cross-sectional structure diagram of a direct-projection open optical machine in an embodiment of the present application;

[0030] Description of reference numerals:

[0031] 1. Shell; 11. Vent; 12. Optical cavity; 121. Air inlet; 13. Fan cavity; 131. Exhaust port; 132. Auxiliary heat dissipation hole; 14. First heat dissipation channel; 15. Second heat dissipation channel; 16. Third heat dissipation channel; 21. First Fresnel lens; 22. Heat-insulating glass; 23. LCD screen; 24. Second Fresnel lens; 3. Heat dissipation fan; 4. Light source module; 41. LED light source; 42. Light funnel; 5. Light source radiator; 6. Primary dust-proof structure; 61. Wind shield; 62. Gap; 7. Secondary dust-proof structure; 8. Projection module. DETAILED DESCRIPTION

[0032] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention.

[0033] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] See also Figures 1 to 4 This embodiment provides a direct-projection open light machine with efficient heat dissipation, including: a housing 1, an optical device, a heat dissipation fan 3, a light source module 4 and a light source heat sink 5.

[0035] The housing 1 has an optical cavity 12 and a fan cavity 13 connected through a vent 11 formed inside, and an air inlet 121 connected to the optical cavity 12 and an air outlet 131 connected to the fan cavity 13 are provided on the outside of the housing 1;

[0036] The optical device is disposed in the optical cavity 12 , and the optical device includes an LCD screen 23 . The LCD screen 23 is located between the air inlet 121 and the air vent 11 .

[0037] The heat dissipation fan 3 is disposed in the fan cavity 13 .

[0038] The light source module 4 is disposed in the housing 1 and is used to provide light to the LCD screen 23 .

[0039] The light source heat sink 5 is disposed outside the housing 1 and located at the exhaust port 131 . The light source heat sink 5 is used to dissipate heat for the light source module 4 .

[0040] Among them, the outer side of the shell 1 is also provided with a primary dustproof structure 6, which is used to remove dust from the air flowing into the air inlet 121. The primary dustproof structure 6 includes a plurality of windshields 61 arranged at intervals, and the gap 62 between two adjacent windshields 61 is for air to flow through, and the surface of the windshield 61 is provided with dust-adhesive glue. The windshield 61 can block the passing air, so that the air can only pass through the gap 62 between two adjacent windshields 61. When the air passes through the primary dustproof structure 6, the air first hits the windshield 61, so that the dust particles in the air can be adhered by the dust-adhesive glue on the surface of the windshield 61, thereby effectively removing the dust in the air. The dust-removed air passes through the gap 62 between two adjacent windshields 61 and then enters the air inlet 121.

[0041] When the heat dissipation fan 3 is working, it can drive the external cold air to pass through the dust removal of the primary dustproof structure 6 and then enter the air inlet 121. The cold air takes away the heat of the LCD screen 23 in the optical cavity 12 and then enters the fan cavity 13 through the vent 11. Then, the air is accelerated by the heat dissipation fan 3 and discharged from the exhaust port 131. When discharged, the air can also pass through the light source radiator 5, thereby taking away the heat of the light source radiator 5 and discharging it to the outside, thereby ensuring the heat dissipation effect of the light source radiator 5 on the light source module 4.

[0042] Through the above scheme, it can be known that the direct projection open optical machine of the embodiment of the present application removes dust from the air by setting a first-level dustproof structure 6 on the air inlet path of the air inlet 121, thereby effectively preventing the dust in the air from affecting the LCD screen 23, avoiding the appearance of black spots on the LCD screen 23, ensuring the overall projection effect, and being conducive to improving the user experience. The first-level dustproof structure 6 has a reasonable structural design and a good dustproof effect. On the other hand, the internal structure of the optical machine is reasonably arranged, which can effectively ensure the heat dissipation of the LCD screen 23 while effectively cooling the light source radiator 5, so that the light source radiator 5 can effectively dissipate heat from the light source module, thereby increasing the life of the entire machine.

[0043] Specifically, in this embodiment, the windshield 61 is inclined relative to the air inlet path of the air inlet 121, thereby better blocking the air, so that all the air can hit the windshield 61 and the dust can be stuck by the dust sticking glue. In this embodiment, the air inlet path of the air inlet 121 is parallel to the light emitting path of the light source module 4.

[0044] In order to improve the dust removal effect of the optical machine, preferably, a secondary dustproof structure 7 is also provided on the outer side of the shell 1 , and the secondary dustproof structure is used to remove dust from the air flowing into the air inlet 121 , and the secondary dustproof structure 7 is arranged at the air inlet 121 .

[0045] Compared with the secondary dustproof structure 7, the primary dustproof structure 6 is farther from the air inlet 121. Therefore, when the heat dissipation fan 3 is working, the air first passes through the primary dustproof structure 6 for dust removal, then passes through the secondary dustproof structure 7 for dust removal, and finally enters the air inlet 121.

[0046] Specifically, in this embodiment, the secondary dustproof structure 7 is an arc-shaped air guide shell, and openings are provided at both ends of the arc-shaped air guide shell, wherein the opening at one end of the arc-shaped air guide shell faces the primary dustproof structure 6, and the opening at the other end is connected to the air inlet 121, and the inner wall of the arc-shaped air guide shell is also provided with dust-adhesive glue. Through such a setting, when air passes through the arc-shaped air guide shell, it can hit its inner wall, so that the dust is adhered to the dust-adhesive glue on the inner wall, and the dust is further removed. Wherein, the dust-adhesive glue is a self-adhesive glue.

[0047] Preferably, the housing 1 is further provided with auxiliary heat dissipation holes 132, and the fan cavity 13 is connected to the outside through the auxiliary heat dissipation holes 132. Therefore, when the heat dissipation fan 3 is working, the external cold air can also be sucked in through the auxiliary heat dissipation holes 132, and the external cold air can be mixed with the hot air that takes away the heat of the LCD screen 23 in the fan cavity 13, so that the temperature of the hot air is reduced, and finally blown to the light source radiator 5 at the exhaust port 131 to cool the light source radiator 5. It can be understood that by such a setting, the cooling effect on the light source radiator 5 can be improved, so that the temperature of the light source radiator 5 is lower.

[0048] Specifically, in this embodiment, the optical device further comprises a first Fresnel lens 21, a heat-insulating glass 22, and a second Fresnel lens 24. The first Fresnel lens 21, the heat-insulating glass 22, the LCD screen 23, and the second Fresnel lens 24 are sequentially arranged at intervals along the optical path. A first heat dissipation channel 14 is formed between the first Fresnel lens 21 and the heat-insulating glass 22, a second heat dissipation channel 15 is formed between the heat-insulating glass 22 and the LCD screen 23, and a third heat dissipation channel 16 is formed between the LCD screen 23 and the second Fresnel lens 24. The first heat dissipation channel 14, the second heat dissipation channel 15, and the third heat dissipation channel 16 are all connected to the air inlet 121 and the vent 11. Thus, the cold air flowing in from the air inlet 121 can flow into the first heat dissipation channel 14, the second heat dissipation channel 15, and the third heat dissipation channel 16 at the same time, so that the first Fresnel lens 21, the heat-insulating glass 22, the LCD screen 23, and the second Fresnel lens 24 can be effectively cooled. The heat dissipation channels arranged in this way have a reasonable structure, and the cold air passing through the three heat dissipation channels at the same time can effectively reduce the temperature of the optical device.

[0049] Specifically, the light source module 4 includes an LED light source 41 and a light funnel 42 . The light emitted by the LED light source 41 enters the first Fresnel lens 21 after passing through the light funnel 42 . The light source heat sink 5 is disposed at the back of the LED light source 41 .

[0050] The direct projection open light machine of this embodiment further includes a projection module 8, which is arranged on the light exiting side of the second Fresnel lens 24, and the light emitted from the second Fresnel lens 24 directly passes through the projection module 8 before being emitted. The light emitted by the LED light source 41 passes through the light funnel 42, the first Fresnel lens 21, the heat-insulating glass 22, the LCD screen 23 and the second Fresnel lens 24 in sequence before being emitted from the projection module 8 to form a projected image.

[0051] The heat dissipation fan 3 described in this embodiment is a turbine fan, which is used to overcome the wind resistance caused by the long air duct.

[0052] This embodiment also provides an LCD projector, including the direct projection open light engine of this embodiment. Since it has the above direct projection open light engine, the LCD projector of this embodiment also has all the beneficial effects of the above direct projection open light engine, which will not be described in detail.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model manual self-centering vise. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A direct projection open light machine with high heat dissipation efficiency, characterized in that: include: Housing, optical device, heat dissipation fan, light source module and light source heat sink; An optical cavity and a fan cavity connected through a vent are formed inside the housing, and an air inlet connected to the optical cavity and an air outlet connected to the fan cavity are arranged on the outside of the housing; The optical device is arranged in the optical cavity, and the optical device comprises an LCD screen, and the LCD screen is located between the air inlet and the air vent; The heat dissipation fan is arranged in the fan cavity; The light source module is arranged in the housing and is used to provide light source to the LCD screen; The light source heat sink is arranged outside the housing and located at the exhaust port, and the light source heat sink is used to dissipate heat from the light source module; Among them, a primary dust-proof structure is also provided on the outside of the shell, and the primary dust-proof structure is used to remove dust from the air flowing into the air inlet. The primary dust-proof structure includes a plurality of wind shields arranged at intervals, and the gap between two adjacent wind shields can allow air to flow through, and the surface of the wind shield is provided with dust-sticking glue.

2. The direct projection open light machine according to claim 1, characterized in that: The wind shield is arranged to be inclined relative to the air intake path of the air intake port.

3. The direct projection open light machine according to claim 1, characterized in that: A secondary dustproof structure is also provided on the outer side of the shell, and the secondary dustproof structure is used to remove dust from the air flowing into the air inlet, and the secondary dustproof structure is provided at the air inlet; Compared with the secondary dustproof structure, the primary dustproof structure is farther away from the air inlet.

4. The direct projection open light machine according to claim 3, characterized in that: The secondary dustproof structure is an arc-shaped air guide shell, and openings are provided at both ends of the arc-shaped air guide shell, wherein the opening at one end of the arc-shaped air guide shell faces the primary dustproof structure, and the opening at the other end is connected to the air inlet; The inner wall of the arc-shaped air guide shell is also provided with dust-sticking glue.

5. The direct projection open light machine according to claim 1, characterized in that: The shell is also provided with auxiliary heat dissipation holes, and the fan cavity is connected with the outside through the auxiliary heat dissipation holes.

6. The direct projection open light machine according to claim 1, characterized in that: The optical device also includes a first Fresnel lens, a heat-insulating glass, and a second Fresnel lens. The first Fresnel lens, the heat-insulating glass, the LCD screen, and the second Fresnel lens are arranged in sequence along the optical path. A first heat dissipation channel is formed between the first Fresnel lens and the heat-insulating glass, a second heat dissipation channel is formed between the heat-insulating glass and the LCD screen, and a third heat dissipation channel is formed between the LCD screen and the second Fresnel lens. The first heat dissipation channel, the second heat dissipation channel, and the third heat dissipation channel are all connected to the air inlet and the air vent.

7. The direct projection open light machine according to claim 6, characterized in that: The light source module comprises an LED light source and a light funnel. The light emitted by the LED light source passes through the light funnel and then enters the first Fresnel lens. The light source heat sink is arranged at the back of the LED light source.

8. The direct projection open light machine according to claim 7, characterized in that: It also includes a projection module, which is arranged on the light-emitting side of the second Fresnel lens. The light emitted from the second Fresnel lens directly passes through the projection module and then emits.

9. The direct projection open light machine according to any one of claims 1 to 8, characterized in that: The heat dissipation fan is a turbine fan.

10. An LCD projector, characterized in that: include: A direct projection open light machine as described in any one of claims 1 to 9.

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