Light leakage prevention projector

Abstract

The utility model relates to a light leakage prevention projector, which comprises an outer shell, a light machine main body and a heat dissipation device, heat dissipation holes communicated with the interior of the outer shell are formed in the side face of the outer shell, the ray machine body is arranged in the outer shell, ventilation openings communicated with the interior of the ray machine body are formed in the ray machine body, the heat dissipation device is arranged in the outer shell and comprises a heat dissipation fan and a heat dissipation device which are located at the positions corresponding to the heat dissipation holes, and the ventilation openings face the heat dissipation fan; the heat dissipation fan is used for driving air in the outer shell to pass through the heat dissipation device and then be discharged from the heat dissipation holes, the heat dissipation device comprises a plurality of heat dissipation fins arranged at intervals, and the heat dissipation fins are bent to form a preset angle to form a light blocking structure. In the application, the heat dissipation fins are bent at a certain angle to form the light blocking structure, so that the light blocking effect is realized, the light is prevented from directly leaking from the gaps among the heat dissipation fins, the light leakage phenomenon of the heat dissipation holes can be reduced, and the user experience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of projectors, in particular to a light leakage-proof projector. Background Art

[0002] The optical engine of the projector is the main heat-generating component, so it is necessary to design a heat dissipation structure for the optical engine. Optical engines are generally divided into closed optical engines and open optical engines. The air inside the closed optical engine is self-circulating and is not connected to the outside air, while the traditional open optical engine needs to be connected to the outside air. There is a vent on the optical engine, and this type of optical engine has a better heat dissipation effect.

[0003] The existing open optical machine has a vent connected to the outside, and there is no light-blocking design inside the projector. The light inside the optical machine is easily refracted through the vent, and the emitted light passes through the heat dissipation device and then leaks out through the heat dissipation holes of the projector shell. Due to the light leakage, the projector leaks light significantly when used in a dark environment, which seriously affects the user experience.

[0004] Therefore, it is urgent to design a solution to prevent light leakage for projectors using open optical engines. Utility Model Content

[0005] Based on this, the purpose of the utility model is to overcome the deficiencies of the prior art and provide a projector that prevents light leakage.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A light leakage-proof projector, comprising:

[0008] Outer shell, optical machine body and heat dissipation device;

[0009] A heat dissipation hole connected to the interior of the outer shell is provided on the side of the outer shell, the optical machine body is provided in the outer shell, a vent connected to the interior of the optical machine body is provided on the optical machine body, the heat dissipation device is provided in the outer shell, the heat dissipation device includes a heat dissipation fan and a radiator located at a position corresponding to the heat dissipation hole, the vent faces the heat dissipation fan, the heat dissipation fan is used to drive the air in the outer shell to pass through the radiator and then be discharged from the heat dissipation hole, the radiator includes a plurality of heat dissipation fins arranged at intervals, and the plurality of heat dissipation fins are bent at a preset angle to form a light-blocking structure.

[0010] As an implementation manner, the bending angle of the heat dissipation fin is 150° to 160°.

[0011] As an implementation manner, a light absorbing layer or a light absorbing structure is provided on the surface of the heat dissipation fin.

[0012] As an embodiment, the light absorption structure is an array-distributed microstructure, and the microstructure includes at least one structure selected from the group consisting of a triangle, a parallelogram, a trapezoid, and a rectangle.

[0013] As an embodiment, the light absorbing layer includes a light absorbing black coating or a light absorbing fluff layer.

[0014] As an implementation manner, an air outlet shell extends from the vent of the optical machine body, the vent is connected to the interior of the outer shell through the air outlet of the air outlet shell, and the air outlet shell is bent.

[0015] As an implementation manner, a light absorbing layer or a light absorbing structure is provided on the inner surface of the air outlet housing.

[0016] As an implementation manner, a light blocking bracket is provided between the vent and the heat dissipation fan.

[0017] As an implementation manner, the light blocking bracket includes a frame and a plurality of spaced light blocking sheets arranged in the frame, and the light blocking sheets are arranged to be inclined with respect to the axial direction of the heat dissipation hole.

[0018] As an implementation manner, a light absorbing layer or a light absorbing structure is provided on the surface of the light blocking sheet.

[0019] In the present application, a plurality of the heat sink fins are bent at a preset angle to form a light-blocking structure. By bending the heat sink fins at a certain angle to form a light-blocking structure, the light-blocking effect is achieved, preventing light from leaking directly from the gaps between the heat sink fins, which can greatly reduce the light leakage phenomenon of the heat sink hole and help improve the user experience.

[0020] 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

[0021] Figure 1 This is a schematic diagram of the structure of a projector according to an embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the internal structure of a projector according to an embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the internal structure of a projector according to an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of the heat sink structure of an embodiment of the present application;

[0025] Figure 5 A schematic diagram of a light absorption structure according to an embodiment of the present application;

[0026] Figure 6This is a schematic diagram of the structure of a projector according to another embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of the structure of a projector according to another embodiment of the present application;

[0028] Figure 8 This is a structural schematic diagram of a light shielding bracket according to another embodiment of the present application;

[0029] Description of reference numerals:

[0030] 1. Outer shell; 11. Heat dissipation holes; 2. Optical machine body; 21. Ventilation holes; 22. Air outlet shell; 3. Heat dissipation device; 31. Cooling fan; 32. Radiator; 321. Cooling fins; 4. Light shielding bracket; 41. Frame; 42. Light shielding sheet. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] See also Figures 1 to 5 This embodiment provides a light leakage-proof projector, comprising: an outer shell 1, an optical machine body 2, and a heat dissipation device 3. The outer shell 1 is used to install various components of the projector, the optical machine body 2 can form a projection light with image information to be projected onto a projection surface, and the heat dissipation device 3 is used to dissipate heat from the optical machine body 2.

[0034] Among them, the side of the outer shell 1 is provided with a heat dissipation hole 11 connected to the interior of the outer shell 1, the optical machine body 2 is arranged in the outer shell 1, and the optical machine body 2 is provided with a vent 21 connected to the interior of the optical machine body 2. The hot air in the optical machine body 2 can be discharged to the outer shell 1 through the vent 21 for cooling. The heat dissipation device 3 is arranged in the outer shell 1, and the heat dissipation device 3 includes a heat dissipation fan 31 and a radiator 32 located at a position corresponding to the heat dissipation hole 11. The vent 21 faces the heat dissipation fan 31. The heat dissipation fan 31 is used to drive the air in the outer shell 1 to pass through the radiator 32 and then be discharged from the heat dissipation hole 11, thereby achieving a cooling effect. Among them, the radiator 32 is used to dissipate heat from the light source module of the optical machine body 2, and the radiator 32 includes a plurality of heat dissipation fins 321 arranged at intervals.

[0035] In the prior art, the light refracted from the vent 21 passes through the gap between the cooling fan 31 and the plurality of cooling fins 321 and then leaks out from the cooling hole 11, thereby causing light leakage in the projector and a poor user experience. Therefore, in this embodiment, the plurality of cooling fins 321 are bent at a preset angle to form a light-blocking structure. By bending the cooling fins 321 at a certain angle to form a light-blocking structure, the effect of blocking light is achieved, and light is prevented from leaking directly from the gaps between the cooling fins 321, which can greatly reduce the light leakage of the cooling hole 11 and help improve the user experience. Specifically, after the cooling fins 321 are bent, a portion of the cooling fins 321 is inclined with respect to the axial direction of the cooling hole 11, so that when viewed along the axial direction of the cooling hole 11, only the bent cooling fins 321 can be seen, which can achieve a light-blocking effect.

[0036] In this embodiment, the bending angle of the heat dissipation fin 321 is 150° to 160°, that is, one part of the heat dissipation fin 321 and another part form an angle, and the angle ranges from 150° to 160°. The heat dissipation fin 321 arranged in this way has a good light shielding effect.

[0037] Preferably, a light absorbing layer or a light absorbing structure is provided on the surface of the heat dissipation fin 321. The light absorbing layer or the light absorbing structure can absorb light, and can reduce the reflection of light on the surface of the heat dissipation fin 321, thereby further reducing the occurrence of light leakage. Specifically, the light absorbing structure of this embodiment can be a microstructure distributed in an array, and a depression is formed between two microstructures. Optionally, the microstructure includes at least one structure selected from the group consisting of a triangle, a parallelogram, a trapezoid, and a rectangle. Please refer to Figure 5 , Figure 5 The microstructure shown in (1) is a triangle. Figure 5 The microstructure shown in (2) is a parallelogram, Figure 5 The microstructure shown in (3) is a trapezoid. Figure 5 The microstructure shown in (4) is a rectangle. The array distribution of the microstructure can also be specified, and the array distribution of different microstructures can be different. For example, the array distribution of the triangular structure is 10 microns apart, that is, two adjacent triangular structures are 10 microns apart. The array distribution of the parallelogram is 20 microns apart, that is, two adjacent parallelogram structures are 20 microns apart. In this setting, the array-distributed microstructure can reflect light multiple times, and can absorb once during each reflection process. After multiple reflections, the light can be basically eliminated or even completely eliminated. In addition, the light-absorbing layer of this embodiment includes a light-absorbing black coating or a light-absorbing fluff layer. The light-absorbing black coating or the light-absorbing fluff layer can absorb light, weaken the reflection of light, and reduce the impact of stray light.

[0038] In order to further reduce light leakage, preferably, as Figure 6 As shown, in some embodiments, the optical machine body 2 extends an air outlet housing 22 from the vent 21, and the vent 21 is connected to the inside of the outer shell 1 through the air outlet of the air outlet housing 22, and the air outlet housing 22 is bent. The air discharged from the vent 21 is guided by the air outlet housing 22 so that the air enters the cooling fan 31. At the same time, the air outlet housing 22 is bent, and the light can be reflected multiple times in the air outlet housing 22, thereby reducing the light emitted from the air outlet housing 22 and further reducing light leakage.

[0039] The light absorbing layer or light absorbing structure mentioned above may also be provided on the inner surface of the air outlet housing 22, thereby reducing the reflection of light on the inner surface of the air outlet housing 22, thereby further reducing the occurrence of light leakage.

[0040] In order to further reduce light leakage, preferably, as Figure 7 and 8 As shown, in some embodiments, a light shielding bracket 4 is provided between the vent 21 and the cooling fan 31, and the light shielding bracket 4 can shield the propagation of light without affecting the flow of air. Specifically, the light shielding bracket 4 includes a frame 41 and a plurality of spaced light shielding sheets 42 provided in the frame 41, and the light shielding sheets 42 are arranged at an angle to the axial direction of the cooling hole 11. Air can flow through the gaps of the light shielding sheets 42, and the light shielding sheets 42 can shield light.

[0041] The surface of the light blocking sheet 42 may also be provided with the light absorbing layer or light absorbing structure, thereby reducing the reflection of light on the surface of the light blocking sheet 42 and further reducing the occurrence of light leakage.

[0042] 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 light leakage-proof projector, characterized in that: include: Outer shell, optical machine body and heat dissipation device; A heat dissipation hole connected to the interior of the outer shell is provided on the side of the outer shell, the optical machine body is provided in the outer shell, a vent connected to the interior of the optical machine body is provided on the optical machine body, the heat dissipation device is provided in the outer shell, the heat dissipation device includes a heat dissipation fan and a radiator located at a position corresponding to the heat dissipation hole, the vent faces the heat dissipation fan, the heat dissipation fan is used to drive the air in the outer shell to pass through the radiator and then be discharged from the heat dissipation hole, the radiator includes a plurality of heat dissipation fins arranged at intervals, and the plurality of heat dissipation fins are bent at a preset angle to form a light-blocking structure.

2. The light leakage-proof projector according to claim 1, characterized in that: The bending angle of the heat dissipation fin is 150° to 160°.

3. The light leakage-proof projector according to claim 1, characterized in that: A light absorbing layer or a light absorbing structure is arranged on the surface of the heat dissipation fin.

4. The light leakage-proof projector according to claim 3, characterized in that: The light absorption structure is a microstructure distributed in an array, and the microstructure includes at least one structure selected from the group consisting of a triangle, a parallelogram, a trapezoid and a rectangle.

5. The light leakage-proof projector according to claim 3, characterized in that: The light absorbing layer includes a light absorbing black coating or a light absorbing fluff layer.

6. The light leakage-proof projector according to claim 1, characterized in that: An air outlet shell extends from the vent of the optical machine body, and the vent is connected to the interior of the outer shell through the air outlet of the air outlet shell, and the air outlet shell is bent.

7. The light leakage-proof projector according to claim 6, characterized in that: The inner surface of the air outlet housing is provided with a light absorbing layer or a light absorbing structure.

8. The light leakage-proof projector according to any one of claims 1 to 7, characterized in that: A light blocking bracket is arranged between the vent and the heat dissipation fan.

9. The light leakage-proof projector according to claim 8, characterized in that: The light shielding bracket comprises a frame and a plurality of spaced light shielding sheets arranged in the frame, wherein the light shielding sheets are arranged obliquely with respect to the axial direction of the heat dissipation hole.

10. The light leakage-proof projector according to claim 9, characterized in that: A light absorbing layer or a light absorbing structure is arranged on the surface of the light blocking sheet.

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