TWI393988B - Light source module and projector having same - Google Patents

Description

Light source module and projector

The invention relates to a light source module and a projector using the same.

The projector is a high-precision opto-mechatronics product. Its internal components are very sensitive to temperature, and the complexity of the internal structure of the projector makes the heat dissipation problem of the projector a major issue for manufacturers.

As the projector is getting smaller and smaller, the projector's light source is increasingly using red, green and blue light-emitting diodes (LEDs) as the light source. And in order to minimize the size of the projector, there is an L-shaped arrangement in the arrangement of the light source inside the projector. In this way, the red and blue LEDs share a heat sink, and the heat is dissipated by the fan. At the same time, the green light is separately used by a heat sink, and heat is transmitted to the previous heat sink through a heat pipe to dissipate heat by the fan. In this heat dissipation mode, heat between red, green, and blue LEDs is transmitted to each other and affects each other. However, the red, green and blue LEDs have different heat resistance, and the red LED has the worst heat resistance. When the temperature of the red LED reaches the maximum operating temperature, the green and blue LEDs do not reach the maximum operating temperature. However, in order to make the red LED work normally, when the fan dissipates heat from the heat sink, it is necessary to reduce the temperature of the entire heat sink to the temperature at which the red LED works, with the working temperature of the red LED as a reference. In fact, in order to dissipate heat with the red LED temperature as a reference, the fan needs to provide a larger air volume, a higher rotational speed, and a greater noise. This is not conducive to reducing the energy consumption and noise of the projector.

In view of this, it is necessary to provide a low-energy light source module and projector .

A light source module includes a first light source, a second light source, a third light source, and a first heat sink fin set. The first light source and the second light source are both thermally coupled to the first heat sink fin group. Each of the heat dissipation fins of the first heat dissipation fin set is provided with a groove, the light source module further includes a second heat dissipation fin set and a heat pipe, and the third light source and the second heat dissipation fin set Thermally coupled, the second heat dissipation fin is thermally coupled to the first heat dissipation fin set through a heat pipe, the groove is configured to reduce heat transfer between the second light source and the first light source, and Heat transfer between the second heat sink fin set and the first light source.

A projector includes a light source module and a fan, and the light source module includes a first light source, a second light source, a third light source, and a first heat sink fin set. The first light source and the second light source are both thermally coupled to the first heat sink fin group. Each of the heat dissipation fins of the first heat dissipation fin set is provided with a groove, the light source module further includes a second heat dissipation fin set and a heat pipe, and the third light source and the second heat dissipation fin set Thermally coupled, the second heat dissipation fin is thermally coupled to the first heat dissipation fin set through a heat pipe, the groove is configured to reduce heat transfer between the second light source and the first light source, and Heat transfer between the second heat sink fin set and the first light source, and the fan is used to cool the light source module.

The light source module provided by the present invention isolates the influence of the second light source on the heat dissipation of the first light source by processing the groove on the heat dissipation fin, so that the first light source needs less air volume when working at the same temperature, thereby reducing the air volume. The first fin group is the energy required for exhaust and reduces the noise generated by the exhaust.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a projector 10 according to an embodiment of the present invention includes a housing 1 , a heat dissipation channel 2 , a first fan 3 , a second fan 4 , and a light source module 6 . The heat dissipating flow passage 2 has an air inlet 2a and an air outlet 2b, and can be formed between the air inlet 2a and the air outlet 2b as shown by the arrow symbol in Fig. 1, so that the wind can enter and exit from the air inlet 2a. The flow path discharged from the tuyere 2b. The first fan 3 is disposed at the air inlet 2a of the heat dissipation channel 2. The first fan 3 includes a fan air outlet 3a, and the first fan 3 blows wind into the air inlet 2a of the heat dissipation channel 2 through the fan air outlet 3a. The second fan 4 is disposed at the air outlet 2b of the heat dissipation channel 2 for discharging hot air in the heat dissipation channel 2 out of the projector 10.

The light source module 6 is disposed in the housing 1 . The light source module 6 includes a first heat dissipation fin group 61 , a second heat dissipation fin group 62 , a heat pipe 63 , a heat equalization plate 64 , a first light source 65 , a second light source 66 , a third light source 67 , and a heat dissipation base 68 . . The first light source 65 has the worst heat resistance. In this embodiment, the first light source 65 is a red light emitting diode, the second light source 66 is a blue light emitting diode, and the third light source 67 is a green light emitting diode.

Referring to FIG. 2, the heat dissipation base 68 is an L-shaped substrate, and the heat dissipation base 68 is made of a heat conductive material. The heat dissipation base 68 includes a first plate 680 and a second plate 681 that are perpendicular to each other. The first light source 65 and the second light source 66 are fixed on the first board 680, and the third light source 67 is fixed on the second board 681 to provide a light source required for the projector 1 to project. In this embodiment, in order to prevent the second light source 66 from transmitting heat to the first light source 65 through the heat dissipation base 68, the first light source is affected. 65. The first plate 680 processes a heat insulating groove 680a between the second light source 66 and the first light source 65.

The first heat dissipation fin group 61 is thermally coupled to the first plate 680 for dissipating heat generated by the first light source 65 and the second light source 66. The second heat dissipation fin group 62 is thermally coupled to the second plate 681 for dissipating heat generated by the third light source 67. The first end 631 and the second end 632 of the heat pipe 63 are thermally coupled to the first heat dissipation fin group 61 and the second heat dissipation fin group 62 respectively, and the heat conduction of the second heat dissipation fin 62 can be guided. It flows to the first heat radiation fin group 61 located at the heat dissipation flow path 2. In the embodiment, the heat-receiving plate 64 is thermally coupled between the heat pipe 63 and the first heat-dissipating fin group 61 for distributing the heat of the heat pipe 63 to the first heat-dissipating fins. Group 61. In the embodiment, the heat equalizing plate 64 is a rectangular aluminum plate.

Referring to FIG. 3 , each of the heat dissipation fins 61 a of the first heat dissipation fin set 61 includes a first side 611 and a second side 612 . The first side 611 and the second side 612 are parallel to each other. The first side 611 is connected to the first plate 680. The second side 612 is connected to the heat equalizing plate 64. Each of the heat dissipation fins 61a of the first heat dissipation fin group 61 is further provided with a splayed groove 613. The splay groove 613 includes a first groove 601 and a second groove 602. The groove shape of the first groove 601 is rectangular, and the width a of the first groove 601 is 1.5-2 mm. In this embodiment, the width a of the first groove 601 is 2 mm. The first trench 601 includes a first start end 601a. The first starting end 601a is located between the first light source 65 and the second light source 66. In this embodiment, the first starting end 601a is opened on the first side 611 of the heat dissipation fin 61a, and The heat insulating grooves 680a communicate with each other. The angle between the first groove 601 and the first side 611 is a first angle α, and the first angle α is 20 degrees to 40 degrees. In this embodiment, the angle α is equal to 40 degrees. The length L1 of the first groove 601 is between 1/3 and 1/2 of the vertical distance L of the first starting end 601a to the second plate 681. In the embodiment, the length L1 is 1/1 2L. The first trench 601 separates an area on the first heat dissipation fin group 61 that is affected by the second light source 66 from an area affected by the first light source 65 to reduce the second light source 66. The generated heat is conducted to the first light source 65, thereby reducing the rise in temperature of the first light source 65.

The groove type of the second groove 602 is rectangular, and the width b of the second groove 602 is 1.5-2 mm. In the embodiment, the width b of the second groove 602 is 2 mm. The second trench 602 includes a second start end 602a. In this embodiment, the vertical distance c of the second starting end 602a from the second side 612 is 5-10 mm, and the distance from the end 641 of the heat equalizing plate 64 along the first side 611 is d is less than 3 mm. The angle between the second groove 602 and the second side 612 is a second angle β, the second angle β is 15 degrees to 50 degrees, and the length L2 of the second groove 602 is The contact length L3 of the hot plate 64 with the first heat radiation fin group 61 is 0.8 to 1.2 times. In the present embodiment, the length L2 of the second groove 602 is 1.2L3. The second trench 602 separates an area of the first heat dissipation fin group 61 affected by the heat pipe 63 from an area affected by the first light source 65 to reduce the generation of the third light source 67. Heat is conducted to the first light source 65, thereby reducing an increase in temperature of the first light source 65.

An end of the first set of heat sinks 61 adjacent to the first fan 3 is referred to as an air inlet end 614. A wind cut sound is generated between the first fan 3 and the first heat radiation fin group 61. In this embodiment, a gap m is maintained between the air inlet end 614 of the first heat dissipation fin group 61 and the edge of the fan air outlet 3a of the first fan 3 for reducing the wind cut sound. The wind that is blown out by the first fan 3 is lost, and the noise is too small to cause excessive noise. It is found by experiments that the gap m is preferably 2 mm.

Please refer to FIG. 4 , which is a projector 200 provided by a second embodiment of the present invention. The projector 200 is substantially the same as the projector 10 provided by the first embodiment, except that each of the first fins 161 is different. The heat dissipation fins 161a include a single groove 113. The groove shape of the single groove 113 is rectangular, and the width a of the single groove 113 is 1.5-2 mm. In the present embodiment, the width a of the single groove 113 is 2 mm. The single trench 113 includes a first starting end 113a and a first ending end 113b. The first starting end 113a is located between the first light source 165 and the second light source 166. In this embodiment, the first starting end 113a is formed on the first side 111 of the heat dissipation fin 161a and communicates with the heat insulating groove 121a. The vertical distance c of the first terminating end 113b from the second side 112 is 5-10 mm, and the distance d from the end 164a of the heat equalizing plate 164 in the direction of the first side 111 is less than 3 mm.

The projector provided by the present invention isolates the first light source at the same temperature by processing the groove on the heat dissipation fin to isolate the heat emitted by the second light source and the third light source from affecting the first heat source having the worst heat dissipation. It requires less air volume, which can reduce the energy consumption required by the exhaust and reduce the noise generated by the exhaust.

In addition, those skilled in the art can make other changes in the spirit of the invention, and all changes that are made according to the spirit of the invention should be included in the scope of the invention.

10,200‧‧‧Projector

1‧‧‧shell

2‧‧‧heating runner

2a‧‧‧air inlet

2b‧‧‧air outlet

3‧‧‧First fan

3a‧‧‧fan outlet

4‧‧‧second fan

6‧‧‧Light source module

61‧‧‧First heat sink fin set

61a, 161a‧‧ ‧ heat sink fins

611, 111‧‧‧ first side

612, 112‧‧‧ second side

613‧‧‧8-shaped groove

614‧‧‧Into the wind end

601‧‧‧first trench

602‧‧‧Second trench

62‧‧‧Second heat sink fin set

63‧‧‧heat pipe

631‧‧‧ first end

632‧‧‧ second end

64, 164‧‧ ‧ hot plate

641, 164a‧‧‧ end

113‧‧‧Single trench

113a‧‧‧first starting end

113b‧‧‧first termination

65, 165‧‧‧ first light source

66, 166‧‧‧ second light source

67‧‧‧ Third light source

68‧‧‧Solution base

680‧‧‧ first board

680a, 121a‧‧‧heat insulation tank

681‧‧‧ second board

1 is a schematic view of a projector according to a first embodiment of the present invention; FIG. 2 is a partial schematic view of the projector of FIG. 1; FIG. 3 is a partial schematic view of the projector of FIG. A schematic of the projector provided.

10‧‧‧Projector

1‧‧‧shell

2‧‧‧heating runner

2a‧‧‧air inlet

2b‧‧‧air outlet

3‧‧‧First fan

3a‧‧‧fan outlet

4‧‧‧second fan

6‧‧‧Light source module

61‧‧‧First heat sink fin set

61a‧‧‧Heat fins

611‧‧‧ first side

612‧‧‧ second side

613‧‧‧8-shaped groove

614‧‧‧Into the wind end

601‧‧‧first trench

602‧‧‧Second trench

62‧‧‧Second heat sink fin set

63‧‧‧heat pipe

631‧‧‧ first end

632‧‧‧ second end

64‧‧‧Homothermal board

641‧‧‧End

65‧‧‧First light source

66‧‧‧second light source

67‧‧‧ Third light source

68‧‧‧Solution base

680‧‧‧ first board

680a‧‧‧Insulation tank

681‧‧‧ second board

Claims (7)

A light source module includes a first light source, a second light source, a third light source, and a first heat sink fin set, wherein the first light source and the second light source are both thermally coupled to the first heat sink fin set The improvement is that each of the heat dissipation fins of the first heat dissipation fin set is provided with a groove, the light source module further includes a second heat dissipation fin set and a heat pipe, and the third light source and the first The second heat sink fins are thermally coupled to the first heat sink fins, and the trenches are configured to reduce the second light source and the first light source by a heat pipe. Heat transfer between the heat transfer and heat transfer between the second heat sink fin set and the first light source. The light source module of claim 1, wherein the groove disposed on the first heat dissipation fin set is a figure-eight groove, and the groove includes a first groove and a second groove. The first trench is for reducing heat transfer between the second light source and the first light source, and the second trench is for reducing heat between the third light source and the first light source transfer. The light source module of claim 1, wherein each of the heat dissipation fins of the first heat dissipation fin set includes a first side and a second side, and the first side and the second light source And the third light source is thermally coupled, the second side is thermally coupled to the heat pipe, the first trench includes a first starting end, and the first starting end is located between the first light source and the second light source, And located on the first side, the second trench includes a second starting end, and the second starting end is disposed near an end of the heat pipe thermally coupled to the first heat sink fin group. The light source module of claim 1, wherein the light source module further comprises a heat dissipation base, and the first heat dissipation fin group passes through the dispersion The thermal base is thermally coupled to the first light source and the second light source, and a heat insulating groove is disposed between the first light source and the second light source. A projector includes a light source module and a fan, the light source module includes a first light source, a second light source, a third light source, and a first heat sink fin set, wherein the first light source and the second light source are both thermally coupled The improvement of the first heat dissipation fin set is that each of the heat dissipation fins of the first heat dissipation fin set is provided with a groove, and the light source module further includes a second heat dissipation fin set and a heat pipe. The third light source is thermally coupled to the second heat dissipation fin group, and the second heat dissipation fin is thermally coupled to the first heat dissipation fin group through a heat pipe, and the groove is used to reduce the number Heat transfer between the two light sources and the first light source and heat transfer between the second heat sink fin set and the first light source, the fan being used to cool the light source module. The projector of claim 5, wherein the first light source is a red light emitting diode, the second light source is a blue light emitting diode, and the third light source is a green light emitting light Polar body. The projector of claim 6, wherein the groove provided on the first heat dissipation fin set is a figure-shaped groove, and the groove includes a first groove and a second groove. The first trench is for reducing heat transfer between the second light source and the first light source, and the second trench is for reducing heat transfer between the third light source and the first light source .