Light leakage prevention efficient heat dissipation projector

Abstract

The utility model relates to a light leakage prevention efficient heat dissipation projector. The projector comprises a housing, and a projection ray machine, a first vortex fan and a second vortex fan which are arranged in the housing. An air inlet hole and an air outlet hole are respectively formed in two opposite side walls of the shell; the projection light machine comprises an LCD screen and heat dissipation air channels passing through the two sides of the LCD screen. An air outlet of the first vortex fan is communicated with one end of the heat dissipation air duct through a first air guide structure, an air inlet of the second vortex fan is communicated with the other end of the heat dissipation air duct through a second air guide structure, and an air outlet of the second vortex fan is communicated to the air outlet hole through a third air guide structure; the first air guide structure and the third air guide structure are each provided with at least one bent part used for changing the air direction, and light absorption structures are arranged in the bent parts. According to the technical scheme, leakage of light is difficult to see from the air inlet hole and the air outlet hole of the shell, the light leakage phenomenon can be eradicated, the user experience can be improved, the heat dissipation efficiency of the projector is high, and use is facilitated.

Description

Technical Field

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

[0002] The projector's optical engine is the primary heat-generating component, so designing a heat dissipation structure for the engine is essential. Optical engines are generally divided into closed and open types. Closed engines have self-circulating air inside and are not connected to the outside air, while traditional open engines require external air connection. Existing open projector optical engines typically have a vent on the housing corresponding to the LCD screen, which provides better heat dissipation.

[0003] Existing open-type projectors have a vent that connects to the outside world, and the projector lacks a light-blocking design. This allows light from within the projector to refract through the vent and escape through the heat dissipation holes in the projector's outer casing. This light leakage is noticeable when the projector is used in dark environments, severely impacting the user experience.

[0004] Therefore, for projectors using open optical engines, there is an urgent need to design a solution that can ensure efficient heat dissipation and prevent light leakage. Utility Model Content

[0005] Based on this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a light leakage-proof and highly efficient heat dissipation projector.

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

[0007] A light leakage-proof and high-efficiency heat dissipation projector, comprising:

[0008] A housing and a projection light engine, a first vortex fan and a second vortex fan arranged in the housing;

[0009] The two opposite side walls of the housing are respectively provided with an air inlet and an air outlet;

[0010] The projection light engine includes an LCD screen and a heat dissipation duct passing through both sides of the LCD screen;

[0011] The air outlet of the first vortex fan is connected to one end of the heat dissipation duct through a first air guide structure, the air inlet of the second vortex fan is connected to the other end of the heat dissipation duct through a second air guide structure, and the air outlet of the second vortex fan is connected to the air outlet through a third air guide structure;

[0012] The first wind guide structure and the third wind guide structure each have at least one bending portion for changing wind direction, and a light absorbing structure is provided in the bending portion.

[0013] As an embodiment, the projection light engine further includes a light source module and a light source radiator for dissipating heat from the light source module. The light source module is used to emit light to the LCD screen, and the light source radiator is disposed in the third air guide structure.

[0014] As an embodiment, the light source module includes a light funnel and an LED light source, the light emitting side of the light funnel faces the LCD screen, the LED light source is arranged on the light incident side of the light funnel, and the light source heat sink is in contact with the LED light source.

[0015] As an embodiment, the projector further includes a power supply board disposed in the housing, and the power supply board is disposed between the air inlet hole and the air inlet of the first vortex fan.

[0016] As an embodiment, the projector also includes a temperature sensor and a main control board, wherein the temperature sensor is used to detect the temperature of the LED light source and the heat dissipation air duct, and the first vortex fan, the second vortex fan and the temperature sensor are all electrically connected to the main control board, and the main control board controls the speed of the first vortex fan and the second vortex fan by receiving the temperature signal from the temperature sensor.

[0017] As an embodiment, the temperature sensor includes a first sensor and a second sensor, the first sensor is arranged on the LED light source, and the second sensor is arranged in the heat dissipation duct.

[0018] As an embodiment, the projector further includes a first upper shell and a first lower shell located in the outer shell, the first upper shell can be detachably mounted on the first lower shell to form the first air guide structure, and the first lower shell is integrally formed with the outer shell.

[0019] As an embodiment, the projector also includes a second upper shell and a second lower shell located in the outer shell, the second upper shell can be detachably installed on the second lower shell to form the second air guide structure and the third air guide structure, and the second lower shell is integrally formed with the outer shell.

[0020] As an embodiment, a filter is provided at the air inlet, and the filter is used to filter the air passing through the air inlet.

[0021] As an embodiment, part of the light source heat sink is exposed in the air outlet.

[0022] By adopting the above technical solution, it is difficult to see light leakage from the air inlet and outlet holes of the shell, which can prevent the occurrence of light leakage, which is beneficial to improving user experience. In addition, the heat dissipation efficiency of the projector is also high, which is convenient for use.

[0023] 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

[0024] Figure 1 This is a schematic diagram of the structure of the projector in the embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of the projector with the top removed in an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the internal structure of the projector in an embodiment of the present application;

[0027] Figure 4 for Figure 3 Schematic diagram of air flow in the structure shown (the long black arrows indicate the air flow path);

[0028] Figure 5 This is a schematic diagram of a partial structure of a projector at one viewing angle in an embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of a portion of the structure of the projector from another viewing angle in an embodiment of the present application;

[0030] Description of reference numerals:

[0031] 1. Casing; 11. Air inlet; 12. Air outlet; 13. First upper shell; 14. First lower shell; 15. Second upper shell; 16. Second lower shell; 17. Filter; 2. Projection light engine; 21. LCD screen; 22. Cooling air duct; 23. Light source module; 231. Light funnel; 232. LED light source; 24. Light source heat sink; 31. First vortex fan; 32. Second vortex fan; 41. First air guide structure; 42. Second air guide structure; 43. Third air guide structure; 44. Bending portion; 51. Power board; 52. Main control board. DETAILED DESCRIPTION

[0032] To further illustrate various embodiments, this utility model is provided with accompanying drawings. These drawings form part of the disclosure of this utility model and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will be able to understand other possible implementations and the advantages of this utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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. Therefore, they cannot be understood as limiting the present invention.

[0034] See also Figures 1 to 6 This embodiment provides a light leakage-proof and high-efficiency heat dissipation projector, a housing, and a projection light engine, a first vortex fan, and a second vortex fan arranged in the housing.

[0035] An air inlet and an air outlet are respectively provided on two opposite side walls of the shell. Air can flow into the shell from the air inlet and flow out of the shell from the air outlet.

[0036] The projection light engine includes an LCD screen and heat dissipation ducts passing through both sides of the LCD screen. The heat dissipation ducts flow through both sides of the LCD screen and can efficiently dissipate heat for the LCD screen.

[0037] The air outlet of the first vortex fan is connected to one end of the heat dissipation duct through the first air guide structure, the air inlet of the second vortex fan is connected to the other end of the heat dissipation duct through the second air guide structure, and the air outlet of the second vortex fan is connected to the air outlet through the third air guide structure. Figure 4 As shown, when the first vortex fan and the second vortex fan are started, air can be sucked in from the air inlet, and enter the heat dissipation duct after passing through the first vortex fan and the first air guide structure in sequence to take away the heat of the LCD screen, and then pass through the second air guide structure, the second vortex fan and the third air guide structure and be discharged from the air outlet, thus forming a heat dissipation path to achieve efficient heat dissipation of the LCD screen.

[0038] The first and third air guide structures each have at least one bend, and a light-absorbing structure (not shown) is provided in the bend. This arrangement can change the direction of air flow, extend the length of the entire heat dissipation path, and absorb light. The light-absorbing structure can be a light-absorbing film layer or a light-absorbing microstructure. The first air guide structure has one bend, and the third air guide structure has two bends.

[0039] By adopting the above technical solution, when the internal light of the projector is emitted from one end of the heat dissipation duct, most of the light will first be absorbed by the bent portion of the first air guide structure, and even if the remaining light enters the air outlet of the first vortex fan, it will be difficult to be emitted from the air inlet of the first vortex fan. This is due to the structural limitations of the vortex fan (the directions of the air outlet and the air inlet are orthogonal); similarly, when the internal light of the projector is emitted from the other end of the heat dissipation duct, most of it will first be intercepted by the second vortex fan (the principle is the same as the first vortex fan), and it can also be absorbed when passing through the bent portion of the third air guide structure. It can be seen that by adopting the above technical solution, it is difficult to see light leakage from the air inlet and outlet of the outer shell, which can prevent the occurrence of light leakage, which is beneficial to improving user experience, and the heat dissipation efficiency of the projector is also high, which is convenient for use.

[0040] Specifically, the projection optical engine described in this embodiment also includes a light source module and a light source radiator for dissipating heat from the light source module. The light source module is used to emit light to the LCD screen, and the light source radiator is arranged in the third air guide structure. As a result, the air output from the air outlet of the second vortex fan can also pass through the light source radiator to remove its heat, cool the light source radiator, and then be discharged from the air outlet. The light source module includes a light funnel and an LED light source. The light output side of the light funnel faces the LCD screen, the LED light source is arranged on the light input side of the light funnel, and the light source radiator is in contact with the LED light source. The light emitted by the LED light source is concentrated by the light funnel and then emitted into the LCD screen. The projection optical engine also includes a front Fresnel lens (not marked in the figure) and a rear Fresnel lens (not marked in the figure). The front Fresnel lens is arranged between the light funnel and the LCD screen, and the rear Fresnel lens is arranged on the side of the LCD screen facing away from the light funnel. This can improve image quality.

[0041] Specifically, the projector of this embodiment further includes a power board disposed within the housing. The power board is configured to convert external electrical energy into the electrical energy required within the device. The power board is positioned between the air inlet and the air inlet of the first vortex blower. Thus, when the first vortex blower is operating, air is drawn through the air inlet and passed through the power board, removing heat from the power board. This optimal placement of the power board allows full utilization of the blower for heat dissipation.

[0042] Preferably, the projector of this embodiment further includes a temperature sensor (not shown) and a main control board. The temperature sensor is used to detect the temperature of the LED light source and the heat dissipation duct. The first and second vortex fans and the temperature sensor are all electrically connected to the main control board. The main control board controls the speed of the first and second vortex fans by receiving temperature signals from the temperature sensors. This arrangement allows the fan speed to be regulated based on the projector's internal temperature (light source temperature, LCD screen temperature), ensuring heat dissipation efficiency while effectively managing the projector's energy consumption and improving practicality.

[0043] Among them, the temperature sensor includes a first sensor and a second sensor, the first sensor is arranged on the LED light source, and the second sensor is arranged in the heat dissipation duct, so as to well monitor the temperature of the light source and the LCD screen. The first sensor and the second sensor can be NTC temperature sensors or other sensors, as long as they can achieve the temperature monitoring effect.

[0044] Preferably, this embodiment also includes a first upper shell and a first lower shell located in the outer shell. The first upper shell can be detachably installed on the first lower shell to form the first air guide structure. The first lower shell is integrally formed with the outer shell, which can improve the installation convenience and simplify the internal space, which is conducive to saving production costs.

[0045] Preferably, this embodiment further includes a second upper shell and a second lower shell located in the housing. The second upper shell is detachably mounted on the second lower shell to form the second and third air guide structures. The second lower shell is integrally formed with the housing, which improves installation convenience, simplifies internal space, and helps save production costs. The first and second upper shells can also be integrally formed.

[0046] Preferably, a filter is provided at the air inlet, and the filter is used to filter the air passing through the air inlet to prevent dust from entering the heat dissipation duct through the air inlet and contaminating the LCD screen.

[0047] In order to improve the heat dissipation efficiency, preferably, part of the light source heat sink is exposed in the air outlet, so that the light source heat sink can be closer to the air outside the air outlet, thereby improving the heat dissipation efficiency.

[0048] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A light leakage-proof and high-efficiency heat dissipation projector, characterized in that: include: A housing and a projection light engine, a first vortex fan and a second vortex fan arranged in the housing; The two opposite side walls of the housing are respectively provided with an air inlet and an air outlet; The projection light engine includes an LCD screen and a heat dissipation duct passing through both sides of the LCD screen; The air outlet of the first vortex fan is connected to one end of the heat dissipation duct through a first air guide structure, the air inlet of the second vortex fan is connected to the other end of the heat dissipation duct through a second air guide structure, and the air outlet of the second vortex fan is connected to the air outlet through a third air guide structure; The first wind guide structure and the third wind guide structure each have at least one bending portion for changing wind direction, and a light absorbing structure is provided in the bending portion.

2. The light leakage-proof and high-efficiency heat dissipation projector according to claim 1, characterized in that: The optical projection engine further includes a light source module and a light source radiator for dissipating heat from the light source module. The light source module is used to emit light to the LCD screen. The light source radiator is disposed in the third air guide structure.

3. The light leakage-proof and high-efficiency heat dissipation projector according to claim 2, characterized in that: The light source module includes a light funnel and an LED light source. The light emitting side of the light funnel faces the LCD screen. The LED light source is arranged on the light incident side of the light funnel. The light source heat sink contacts the LED light source.

4. The light leakage-proof and high-efficiency heat dissipation projector according to claim 1, characterized in that: It also includes a power supply board arranged in the housing, and the power supply board is arranged between the air inlet hole and the air inlet of the first vortex fan.

5. The light leakage-proof and high-efficiency heat dissipation projector according to claim 3, characterized in that: It also includes a temperature sensor and a main control board. The temperature sensor is used to detect the temperature of the LED light source and the heat dissipation air duct. The first vortex fan, the second vortex fan and the temperature sensor are all electrically connected to the main control board. The main control board controls the speed of the first vortex fan and the second vortex fan by receiving the temperature signal from the temperature sensor.

6. The light leakage-proof and high-efficiency heat dissipation projector according to claim 5, characterized in that: The temperature sensor includes a first sensor and a second sensor, the first sensor is arranged on the LED light source, and the second sensor is arranged in the heat dissipation duct.

7. The light leakage-proof and high-efficiency heat dissipation projector according to claim 1, characterized in that: It also includes a first upper shell and a first lower shell located in the outer shell. The first upper shell can be detachably mounted on the first lower shell to form the first air guide structure. The first lower shell is integrally formed with the outer shell.

8. The light leakage-proof and high-efficiency heat dissipation projector according to claim 1, characterized in that: It also includes a second upper shell and a second lower shell located in the shell. The second upper shell can be detachably mounted on the second lower shell to form the second air guide structure and the third air guide structure. The second lower shell is integrally formed with the shell.

9. The light leakage-proof and high-efficiency heat dissipation projector according to any one of claims 1 to 8, characterized in that: A filter is provided at the air inlet, and the filter is used to filter the air passing through the air inlet.

10. The light leakage-proof and high-efficiency heat dissipation projector according to any one of claims 2, 3, 5 and 6, characterized in that: Part of the light source heat sink is exposed in the air outlet.

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