An LED light leakage prevention optical engine and projector

Abstract

This utility model relates to an LED light leakage prevention optical engine and a projector. The optical engine includes: a housing, an internal circulation fan, an imaging component, a heat exchange module, and a light source component. The internal circulation fan is disposed inside the housing, and an internal circulation duct is formed inside the housing, connecting the air inlet and outlet of the internal circulation fan. The imaging component includes an LCD screen located in the internal circulation duct. The heat exchange module includes a cold-side heat sink and a hot-side heat sink. The light source component includes an LED light source and a light funnel. The imaging component is disposed on the light-emitting side of the light funnel, and the LED light source is disposed at the light inlet of the light funnel. The LED light source includes a substrate and a light-emitting chip disposed on the substrate. A light-shielding silicone is fixed on the substrate and surrounding the light-emitting chip. The light inlet of the light funnel abuts against the light-shielding silicone. The optical engine of this embodiment forms a closed space between the light funnel and the substrate, eliminating gaps and achieving a light-shielding effect, thus preventing light leakage at the light source and also providing dust protection.

Description

Technical Field

[0001] This utility model relates to the field of LCD projector technology, and in particular to an LED anti-light leakage optical engine and projector. Background Technology

[0002] The key component of an LCD projector is the optical engine, which generally includes an LCD screen, a light source, and a light funnel. The main process of imaging is that the light emitted by the light source is focused by the light funnel and then passes through the LCD screen to form image light.

[0003] When a projector is in use, because the light source is diffused, light can pass through the gaps in the projector and shine onto the outside of the product, causing light leakage, which is particularly detrimental to the viewing experience in dark environments. In this case, it is necessary to block the light from the projector, such as by applying adhesive or black tape, which takes a considerable amount of time. Utility Model Content

[0004] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide an LED light leakage prevention optical engine and projector.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An LED light leakage prevention optical mechanism, comprising:

[0007] The casing, internal circulation fan, imaging components, heat exchange module, and light source components;

[0008] The internal circulation fan is disposed inside the housing, and an internal circulation duct is formed inside the housing, connecting the air inlet and outlet of the internal circulation fan. The imaging component includes an LCD screen located in the internal circulation duct. The heat exchange module includes a cold-side heat sink and a hot-side heat sink. The cold-side heat sink is disposed in the internal circulation duct, and the hot-side heat sink is disposed outside the housing and connected to the cold-side heat sink to conduct heat. The light source component includes an LED light source and a light funnel disposed in the internal circulation duct. The imaging component is disposed on the light-emitting side of the light funnel, and the light inlet of the light funnel extends outside the housing. The LED light source is disposed at the light inlet of the light funnel. The LED light source includes a substrate and a light-emitting chip disposed on the substrate. A light-shielding silicone is fixed on the substrate and surrounding the light-emitting chip. The light inlet of the light funnel abuts against the light-shielding silicone.

[0009] As can be seen from the above configuration, the optical engine of this application embodiment provides a ring of light-shielding silicone around the light-emitting chip on the substrate. The light funnel is in close contact with the light-shielding silicone, so that a closed space is formed between the light funnel and the substrate. The absence of gaps achieves the light-shielding effect, realizing no light leakage at the light source, and also serves as a dustproof function.

[0010] In one embodiment, the light-shielding silicone has a rectangular ring structure, and the ring width of the light-shielding silicone is 1mm-4mm.

[0011] In one embodiment, the thickness of the light-shielding silicone is 0.5mm-2mm.

[0012] In one embodiment, the distance from the inner edge of the light-shielding silicone to the light-emitting chip is 2mm-6mm.

[0013] In one embodiment, the casing contains a first cavity, a second cavity, a heat dissipation cavity, and a fan cavity. The first cavity is located on top of the second cavity. The heat dissipation cavity is located on one side of the first and second cavities and is connected to both the first and second cavities. The fan cavity is located on the other side of the first and second cavities and is connected to both the first and second cavities. The first cavity, heat dissipation cavity, second cavity, and fan cavity are sequentially connected to form the internal circulation air duct. The LCD screen is located in the first cavity, the cold surface heat sink is located in the heat dissipation cavity, the light funnel portion is located in the second cavity, and the internal circulation fan is located in the fan cavity.

[0014] In one embodiment, the optical engine further includes an LED heat sink connected to the side of the substrate facing away from the light funnel.

[0015] In one embodiment, the optical engine further includes an external circulation fan, which is disposed outside the housing and is used to cool the LED heat sink and the hot surface heat sink.

[0016] In one embodiment, the imaging assembly 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 sequentially along the light-emitting direction of the light funnel, and the first Fresnel lens covers the light-emitting port of the light funnel.

[0017] In one implementation, the cold-side radiator and the hot-side radiator are integrated into one unit.

[0018] This application discloses a projector that includes an LED light leakage prevention optical engine as described in this application.

[0019] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the optomechanism in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the internal structure of the optical engine in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the internal gas flow of the optomechanism in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the light source assembly in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the LED light source structure in the embodiments of this application;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 10. Internal circulation air duct; 101. First cavity; 102. Second cavity; 103. Heat dissipation cavity; 104. Fan cavity; 2. Internal circulation fan; 31. First Fresnel lens; 32. Heat insulation glass; 33. LCD screen; 34. Second Fresnel lens; 41. Cold side heat sink; 42. Hot side heat sink; 51. LED light source; 511. Substrate; 5110. Light-shielding silicone; 512. Light-emitting chip; 52. Light funnel; 6. LED heat sink; 7. External circulation fan. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and 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 drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this utility model.

[0029] Please see Figures 1 to 5This embodiment provides an LED light leakage prevention optical engine, which includes: a housing 1, an internal circulation fan 2, an imaging component, a heat exchange module, and a light source component.

[0030] The internal circulation fan 2 is disposed inside the housing 1. An internal circulation duct 10 is formed inside the housing 1, connecting the air inlet and outlet of the internal circulation fan 2. The imaging component includes an LCD screen 33 located within the internal circulation duct 10. The heat exchange module includes a cold-side heat sink 41 and a hot-side heat sink 42. The cold-side heat sink 41 is disposed within the internal circulation duct 10, and the hot-side heat sink 42 is disposed outside the housing 1 and connected to the cold-side heat sink 41 to conduct heat. The light source component includes an LED light source 51 and... The light funnel 52 is disposed in the internal circulation air duct 10, the imaging component is disposed on the light-emitting side of the light funnel 52, the light inlet of the light funnel 52 extends outside the housing 1, the LED light source 51 is disposed at the light inlet of the light funnel 52, the LED light source 51 includes a substrate 511 and a light-emitting chip 512 disposed on the substrate 511, a light-shielding silicone 5110 is fixed on the substrate 511 and disposed around the light-emitting chip 512, and the light inlet of the light funnel 52 abuts against the light-shielding silicone 5110.

[0031] As can be seen from the above configuration, the optical engine of this application embodiment provides a ring of light-shielding silicone 5110 around the light-emitting chip 512 on the substrate 511. The light funnel 52 is in close contact with the light-shielding silicone 5110, so that a closed space is formed between the light funnel 52 and the substrate 511. There are no gaps, which plays a role in shielding light and achieving no light leakage at the light source. At the same time, it also plays a role in dust prevention.

[0032] On the other hand, the optical mechanism of this application can also dissipate heat from the optical funnel 52, resulting in better overall heat dissipation and more stable operation. For example... Figure 3 As shown, where Figure 3 The black arrow in the middle indicates the airflow direction of the internal circulation duct. When the internal circulation fan 2 is started, it drives the airflow in the internal circulation duct 10 to circulate. As the air flows, it passes through the cold surface radiator 41 for heat exchange, thus cooling down and becoming cold air. The cold air cools the LCD screen 33 and the light funnel 52 in the internal circulation duct 10, quickly carrying away the heat generated by the LCD screen 33 and the light funnel 52, and circulating in sequence. Since the cold surface radiator 41 heats up during heat exchange, it needs to be connected to the hot surface radiator 42 outside the casing 1 to absorb the heat from the cold surface radiator 41, keeping the cold surface radiator 41 at a low temperature. This effectively achieves rapid heat dissipation of the LCD screen 33 and the light funnel 52, effectively ensuring the normal operation of the LCD screen 33 and the light funnel 52 and the safety of the whole machine, and extending the service life of the LCD screen 33 and the light funnel 52.

[0033] In some embodiments, the light-shielding silicone 5110 has a rectangular ring structure to fit the shape of the light inlet of the light funnel 52, and the ring width of the light-shielding silicone 5110 is 1mm-4mm, which can achieve a good sealing and light-shielding effect.

[0034] In some embodiments, the thickness of the light-shielding silicone 5110 is 0.5mm-2mm, which can achieve a good sealing and light-shielding effect.

[0035] In some embodiments, the distance from the inner edge of the light-shielding silicone 5110 to the light-emitting chip 512 is 2mm-6mm, maintaining a suitable distance from the light-emitting chip 512 to prevent the light-shielding silicone 5110 from deforming due to heat and affecting its performance.

[0036] Specifically, in this embodiment, the housing 1 has a first cavity 101, a second cavity 102, a heat dissipation cavity 103, and a fan cavity 104 formed inside. The first cavity 101 is disposed on top of the second cavity 102, the heat dissipation cavity 103 is disposed on one side of the first cavity 101 and the second cavity 102, and the heat dissipation cavity 103 communicates with both the first cavity 101 and the second cavity 102. The fan cavity 104 is disposed on the other side of the first cavity 101 and the second cavity 102. On one side, the fan cavity 104 is connected to the first cavity 101 and the second cavity 102 respectively. The first cavity 101, the heat dissipation cavity 103, the second cavity 102 and the fan cavity 104 are sequentially connected to form the internal circulation air duct 10. The LCD screen 33 is disposed in the first cavity 101, the cold surface heat sink 41 is disposed in the heat dissipation cavity 103, the light funnel 52 is partially disposed in the second cavity 102, and the internal circulation fan 2 is disposed in the fan cavity 104. With this arrangement, the internal layout of the casing 1 is reasonable and the air flow is convenient. The air blown out by the internal circulation fan 2 passes through the first cavity 101, the heat dissipation cavity 103 and the second cavity 102 in sequence and returns to the air inlet of the internal circulation fan 2, thereby achieving cooling of the LCD screen 33 and the light funnel 52.

[0037] Preferably, the optomechanism in this embodiment further includes an LED heat sink 6, which is connected to the side of the substrate 511 facing away from the light funnel 52. The LED heat sink can dissipate heat from the LED light source 51, thereby effectively ensuring the normal operation of the LED light source 51 and extending its service life.

[0038] Furthermore, the optical engine in this embodiment also includes an external circulation fan 7, which is disposed outside the housing 1 and is used to cool the LED heat sink 6 and the hot surface heat sink 42 to improve the heat dissipation effect.

[0039] Preferably, the imaging component in this embodiment further includes a first Fresnel lens 31, a heat-insulating glass 32, and a second Fresnel lens 34. The first Fresnel lens 31, the heat-insulating glass 32, the LCD screen 33, and the second Fresnel lens 34 are arranged sequentially along the light-emitting direction of the light funnel 52, and the first Fresnel lens 31 covers the light-emitting port of the light funnel 52.

[0040] Preferably, the cold-side radiator 41 and the hot-side radiator 42 are integrally formed to improve the heat transfer efficiency between the cold-side radiator 41 and the hot-side radiator 42, thereby facilitating heat dissipation.

[0041] This embodiment also provides a projector that includes an LED light leakage prevention optical engine as described in this embodiment. This projector has all the beneficial effects of the optical engine in this embodiment, which will not be described in detail here.

[0042] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An LED light leakage prevention optical mechanism, characterized in that, include: The casing, internal circulation fan, imaging components, heat exchange module, and light source components; The internal circulation fan is disposed inside the housing, and an internal circulation duct is formed inside the housing, connecting the air inlet and outlet of the internal circulation fan. The imaging component includes an LCD screen located in the internal circulation duct. The heat exchange module includes a cold-side heat sink and a hot-side heat sink. The cold-side heat sink is disposed in the internal circulation duct, and the hot-side heat sink is disposed outside the housing and connected to the cold-side heat sink to conduct heat. The light source component includes an LED light source and a light funnel disposed in the internal circulation duct. The imaging component is disposed on the light-emitting side of the light funnel, and the light inlet of the light funnel extends outside the housing. The LED light source is disposed at the light inlet of the light funnel. The LED light source includes a substrate and a light-emitting chip disposed on the substrate. A light-shielding silicone is fixed on the substrate and surrounding the light-emitting chip. The light inlet of the light funnel abuts against the light-shielding silicone.

2. The LED light leakage prevention optical mechanism according to claim 1, characterized in that: The light-shielding silicone has a rectangular ring structure, and the ring width of the light-shielding silicone is 1mm-4mm.

3. The LED light leakage prevention optical mechanism according to claim 1, characterized in that: The thickness of the light-shielding silicone is 0.5mm-2mm.

4. The LED light leakage prevention optical mechanism according to claim 1, characterized in that: The distance from the inner edge of the light-shielding silicone to the light-emitting chip is 2mm-6mm.

5. The LED light leakage prevention optical mechanism according to any one of claims 1-4, characterized in that: The casing contains a first cavity, a second cavity, a heat dissipation cavity, and a fan cavity. The first cavity is located on top of the second cavity. The heat dissipation cavity is located on one side of the first and second cavities and is connected to both the first and second cavities. The fan cavity is located on the other side of the first and second cavities and is connected to both the first and second cavities. The first cavity, heat dissipation cavity, second cavity, and fan cavity are sequentially connected to form the internal circulation air duct. The LCD screen is located in the first cavity, the cold surface heat sink is located in the heat dissipation cavity, the light funnel portion is located in the second cavity, and the internal circulation fan is located in the fan cavity.

6. The LED light leakage prevention optical mechanism according to claim 5, characterized in that: It also includes an LED heat sink, which is connected to the side of the substrate facing away from the light funnel.

7. The LED light leakage prevention optical mechanism according to claim 6, characterized in that: It also includes an external circulation fan, which is located outside the housing and is used to cool the LED heat sink and the hot surface heat sink.

8. The LED light leakage prevention optical mechanism according to claim 7, characterized in that: The imaging assembly 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 sequentially along the light-emitting direction of the light funnel, and the first Fresnel lens covers the light-emitting port of the light funnel.

9. The LED light leakage prevention optical mechanism according to claim 8, characterized in that: The cold-side radiator and the hot-side radiator are integrated into one unit.

10. A projector, characterized in that, Including the LED light leakage prevention optical mechanism as described in any one of claims 1-9.

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