TWM552113U - Projector device and heat dissipation system thereof - Google Patents

Description

Projection device and its heat dissipation system

The present invention relates to the field of projection technology, and more particularly to a heat dissipation system and a projection device applied to the heat dissipation system.

With the development of technology, projection devices (such as projectors) are becoming more and more widely used in life and work. A projection device is a high-power device that converts electrical energy into light energy, and its composition includes a plurality of heat sources that generate a large amount of heat during operation, such as a light source, a color wheel, a light modulator, and the like.

Among them, a light modulator (such as a DMD light modulator) is an important digital optical device currently used in a projector, which performs image modulation by light emitted from a light source via a color wheel or the like to form a picture. However, the illumination of the light source emitted by the light source via the color wheel or the like in the projector causes the temperature of the light modulator to rise, and a large number of control circuits integrated on the light modulator also generate considerable operation during operation. Heat, which causes the operating temperature of the light modulator to rise. Excessive operating temperatures can degrade the life of the light modulator and can even cause damage to the light modulator. Therefore, a heat dissipation system is required to cool and cool the optical modulator, and the operating temperature of the optical modulator is lowered to ensure that the optical modulator is within a set operating temperature to ensure performance and service life.

In a conventional projection device, a heat sink thermally connected to the light modulator is disposed in an air flow passage, and a first suction fan and a first exhaust fan are respectively disposed at two ends of the air flow passage. The heat generated on the light modulator is transferred to the heat sink, and the airflow flowing in the air flow passage flows through the heat sink to take away the heat generated by the heat sink, thereby modulating the light The heat generated by the device is taken away to achieve heat dissipation to the light modulator. However, in the existing heat dissipation mode, the first fan is far from the center position of the light modulator, and the airflow in the airflow passage sequentially flows out through the first end, the center position, and the second end of the heat sink. That is, the airflow in the airflow passage sequentially dissipates heat to the first end, the central position, and the second end of the optical modulator, which cannot directly dissipate heat directly from the center position of the optical modulator, so that The higher operating temperature at the center of the light modulator reduces the lifetime of the light modulator.

In view of the above, it is necessary to provide a heat dissipation system with high heat dissipation efficiency and a projection device using the heat dissipation system.

A heat dissipation system includes a duct assembly, a first fan, and a first heating element; wherein a first air passage is formed in the air duct assembly; and the first fan is disposed on the first Further, the first heat generating component is disposed outside the first air duct, and the airflow discharged by the first fan is substantially perpendicular to a central position of a main heat generating surface of the first heat generating component.

As a preferred solution, the heat dissipation system further includes a heat dissipation component disposed between the first heat generating component and the first fan and thermally connected to a main heat generating surface of the first heat generating component; The airflow discharged by the first fan flows into the heat dissipating component, and is guided to flow out from two airflow outflow directions different from the inflow direction of the airflow via the heat dissipating component.

As a preferred solution, the two airflow outflow directions are oppositely disposed and are respectively disposed substantially perpendicular to the inflow direction of the airflow.

As a preferred solution, the heat dissipating component includes a plurality of heat dissipating fins disposed in parallel, and an air flow channel is formed between each adjacent two heat dissipating fins, and a straight line extending in a direction of the airflow flowing into the heat dissipating device is substantially perpendicular to The plane in which the fins are located, the airflow flowing into the heat dissipating component is guided through the plurality of airflow channels to flow out from two opposite directions extending along the fins.

As a preferred solution, the heat dissipation system is further provided with a second air passage and a third air passage for respectively circulating two air flows flowing out through the heat dissipation component.

As a preferred solution, the heat dissipation system further includes a current limiting plate; wherein the current limiting plate is disposed at an air inlet of the first air passage for preventing passage through the second air passage or the third Airflow from the air duct is drawn into the first air duct.

In a preferred embodiment, the air duct assembly includes a plurality of panels connected to each other, and sidewalls of the plurality of panels define the first air duct.

As a preferred solution, the at least one plate member is made of a heat conductive material, and the heat dissipation system further includes a second heat generating component thermally connected to the plate member made of a heat conductive material.

As a preferred solution, the plurality of panels are made of a heat insulating material.

A projection device comprising any of the above described heat dissipation systems.

The heat dissipation system of the present invention is configured to dissipate the cold air absorbed by the first fan directly to the center position of the first heat generating component by providing the first fan capable of generating an air flow substantially at the center position of the first heat generating component. , improving the heat dissipation efficiency of the first heating element

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways than those described herein, and those skilled in the art can do without departing from the scope of the present invention. Similar applications, and thus the present invention is not limited by the specific embodiments disclosed below.

Secondly, the present invention is described in detail in conjunction with the schematic diagram. In the detailed description of the present embodiment, the cross-sectional view showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and should not be limited herein. The scope of this creative protection. In addition, the actual three-dimensional dimensions of length, width and depth should be included in the actual production.

It should be noted that “substantially perpendicular” and “substantially facing” as used in the present creative embodiment and the appended claims mean that the intersection angle is approximately 90°, for example, the intersection angle is 90±5°, 90± 10°.

Please refer to FIG. 1. FIG. 1 is a structural diagram of an optical path of a projection apparatus. As shown in FIG. 1 , a projection apparatus 100 provided by an embodiment of the present invention includes a light source 10 , a color wheel 20 , at least one optical relay system 30 , a light modulator 40 , and a projection lens unit 50 .

The light source 10 is used to emit an excitation light, such as blue excitation light, and the light source 10 may be a blue laser light source (or a blue laser). In a modified embodiment, the light source 10 may also be a light source of other colors, and is not limited to a blue light source. For example, the light source 10 may be an ultraviolet laser source (or an ultraviolet laser) to emit ultraviolet excitation. Light. Further, the light source 10 is preferably a semiconductor laser light source for providing the excitation light of high brightness.

The color wheel 20 is disposed on the optical path of the excitation light emitted by the light source 10 for receiving the excitation light emitted by the light source 10 and emitting the light of the at least two colors. The color wheel 20 may be a disk-shaped color wheel for sequentially emitting light of the at least two colors (such as red, green, blue, three-color light, yellow-blue light, etc.). Specifically, the color wheel 20 may be provided with a fluorescent material, and the fluorescent material may be excited by the excitation light to generate a laser of another color or two colors (such as a laser of a color such as red, green and yellow). Thus, the color wheel can emit light of at least two colors.

In this embodiment, the color wheel 20 is a transmissive color wheel, that is, the light of the light source 10 is incident from one side of the color wheel 20; and the other side of the color wheel 20 emits the at least two a variety of colors of light. Of course, in a variant embodiment, the color wheel can also be a reflective color wheel 20.

The optical relay system 30 is disposed on one side of the light source 10 for performing uniformization, collection, and shaping of the light emitted by the color wheel 20 (for example, such that the projection spot of the light beam conforms to a predetermined shape). Provided to the light modulator 40.

The light modulator 40 is disposed between the optical relay system 30 and the projection lens unit 50 for incident on the light modulator 40 via the optical relay system 30 according to input image data. The beam is image modulated to produce modulated image light and transmitted to the projection lens unit 50. The light modulator 40 can include a reflective light modulator or a transmissive light modulator. Wherein the light beam from the light source 10 is incident on the front surface of the reflective light modulator and is reflected from the reflective light modulator to the projection lens unit 50; or the light beam from the light source 10 is incident on the light source 10 The front surface of the projection type light modulator is transmitted to the projection lens unit 50 through the projection type light modulator. The reflective light modulator comprises a reflective light valve (Digital Micromirror Device, DMD), the reflective light valve comprising a plurality of tiny mirrors of the same number of primitives, electronically or mechanically changing the angle of each mirror The light beam entering the front surface of the reflective light valve is modulated and reflected. In the embodiment, the light modulator 40 is the reflective light valve, that is, a DMD light modulator.

The projection lens unit 50 is configured to amplify an incident modulated image light and project the modulated image light onto a screen (not shown) to display a predetermined image.

When the light modulator 40 is driven, it generates heat by itself. At the same time, in addition to self-heating, the reflective optical modulator generates heat due to reflection loss and the projection type optical modulator generates heat due to transmission loss.

Please refer to FIG. 2 at the same time. FIG. 2 is a partial structural diagram of the first embodiment of the heat dissipation system. As shown in FIG. 2, a first embodiment of the present invention provides a heat dissipation system 200 disposed adjacent to the light modulator 40. The heat dissipation system 200 is configured to dissipate heat from the heat generating elements of the other light-emitting devices 40, such as the light modulator 40. Specifically, the heat dissipation system 200 includes a channel assembly 60, a first fan 63, a heat dissipation component 64, and a second fan 65.

The channel assembly 60 includes a plurality of panels 61 that are interconnected. It will be appreciated that the plurality of panels 61 may be integrally formed to form the channel assembly 60, or may be separately formed and reassembled to form the channel assembly 60. At least one panel 61 is mounted to the control panel bracket 66. The control board bracket 66 serves as the mounting bracket of the control panel of the projection apparatus 100. It can be appreciated that in other embodiments, the channel assembly 60 can be mounted to other internal supports of the projection device 100. A first air duct 62 is formed in the channel assembly 60. In other words, sidewalls of the plurality of plate members 61 define the first air duct 62. The first air duct 62 has an air inlet 621 and an air outlet 623. The first fan 63 is disposed at the air outlet 623. It can be understood that the first fan 63 can be disposed directly on a plate 61 of the first air duct 62 or on an internal support frame (not shown) of the projection device 100. It can be understood that in other embodiments, other internal components of the projection device 100, such as a circuit board, electronic components, and the like, may also be disposed on the board member 61 such that the heat dissipation system 200 is Other internal components of the projection device 100 dissipate heat.

In the first air passage 62, external cold air is sucked into the first air passage 62 from the air inlet 621 by a pressure (negative pressure) generated by the first fan 63, and is first The fan 63 is discharged from the air outlet 623 to the outside of the first air duct 62. In particular, in the illustrated embodiment, the first air duct 62 is generally dome shaped for guiding and forming an air flow that is substantially perpendicular to the heat dissipation assembly 64. It can be understood that, in other embodiments, the shape of the first air duct 62 is not limited; it should be additionally noted that the board members 61 are made of a heat insulating material (such as an insulating plastic material) for The heat outside the first air passage 62 is prevented from being transmitted to the cold air in the first air passage 62 via the air passage wall.

The heat dissipating component 64 is disposed outside the first air duct 62 and located below the airflow of the air outlet of the first fan 63. Specifically, in the illustrated embodiment, the air outlet of the first fan 63 is also facing the center position of the heat dissipation assembly 64. It can be understood that, in other embodiments, the center position of the heat dissipation component 64 may not be opposite to the air outlet of the first fan 63, as long as the heat dissipation component 64 is located below the airflow of the air outlet of the first fan 63. And the airflow generated by the first fan 63 may be substantially orthogonal (or substantially perpendicular) to the center of the heat dissipation component 64, for example, the first fan 63 is disposed in the middle of the first air duct 62. The position, and the airflow discharged by the first fan 63 flows toward the center of the heat dissipation assembly 64 substantially directly or vertically.

The heat dissipating component 64 includes a plurality of heat dissipating fins 642 disposed in parallel, and each of the adjacent two heat dissipating fins 642 has a predetermined gap therebetween to form an air flow channel. In this embodiment, the heat dissipation fins 642 are disposed in a strip shape, and the heat dissipation fins 642 are arranged in a rectangular shape in parallel. A straight line extending in the airflow direction of the cool air discharged from the exhaust vent of the first fan 63 is substantially perpendicular to a plane in which the heat radiating fins 642 are disposed in parallel. The cool air discharged from the air outlet of the first fan 63 is substantially perpendicularly blown toward the center of the plane of the heat dissipating fins 642 of the heat dissipating component 64, and is guided by the airflow channels. The fins 642 are branched into two airflows at substantially the center position, and the outflow directions of the two airflows are substantially perpendicular to the inflow direction of the airflow flowing into the heat dissipation assembly 64, respectively. The two air flows are respectively discharged in the opposite two directions, that is, two opposite directions in which the heat radiating fins 642 extend along the longitudinal direction thereof, under the pressure (negative pressure) generated by the second fan 65, to The heat dissipation system 200 is outside. It is conceivable that in other embodiments, the second fan 65 can be omitted, and the two airflows shunted by the heat dissipation component 64 can also be discharged to the heat dissipation system 200 under the action of the first fan 63. outer.

The heat dissipation component 64 is also thermally coupled to the first heat generating component. In the embodiment, the first heat generating component is the light modulator 40. The exhaust vent of the first fan 63 is substantially centered on the main heat generating surface of the first heat generating component. It can be understood that the air outlet of the first fan 63 may not be centered on the main heat generating surface of the first heat generating component, as long as the airflow discharged by the first fan 63 is substantially perpendicular to the main heat generating component. The air flow at the center of the heat generating surface may be, for example, the first fan 63 is disposed at a central portion of the first air passage 62 and generates a center substantially perpendicular or perpendicular to the main heat generating surface of the first heat generating component. airflow. The heat generated by the first heat generating component is transferred to the heat dissipating component 64, and the two airflows shunted through the heat dissipating component 64 discharge the heat generated by the first heat generating component to the outside of the heat dissipation system 200. The heat generated by the center position of the main heat generating surface of the first heat generating component is directly transmitted to the heat dissipating component because the air outlet of the first fan 63 is substantially opposite to the center position of the main heat generating surface of the first heat generating component. In turn, the airflow driven by the first fan 63 is quickly carried away, thereby improving the heat dissipation efficiency of the center position of the main heat generating surface of the first heat generating component.

Please refer to FIG. 3. FIG. 3 is a partial structural diagram of a second embodiment of the heat dissipation system. As shown in FIG. 3, the heat dissipation system 200 provided in the second embodiment of the present invention has a structure substantially the same as that of the projection apparatus of the first embodiment. The difference is that the heat dissipation system 200 further includes a current limiting plate 72, a second heating element 74, a third heating element 75, a fourth heating element 76, and a third fan 78. Preferably, the heat generation amount of the third heat generating component 75 and the fourth heat generating component 76 is greater than the heat generation amount of the first heat generating component. At least one of the plates 61 is made of a thermally conductive material such as enamel, silver, copper, or gold or aluminum. The plate member 61 made of a heat conductive material is thermally connected to the second heat generating component 74, which is, for example, a circuit board. The heat dissipation system 200 further includes a second air duct 73 and a third air duct 77, and two air flows that are branched by the heat dissipation component 64, wherein one airflow is discharged to the heat dissipation via the second air duct 73. The system 200 is outside and another air stream is discharged to the outside of the heat dissipation system 200 via the third air duct 77. The second fan 65 and the third heat generating component 75 are disposed in the second air duct 73. Under the action of the second fan 65, the airflow flowing through the second air duct 73 causes the third heat to be generated. The heat generated by the component 75 is discharged to the outside of the heat dissipation system 200. The third fan 78 and the fourth heating element 76 are disposed in the third air duct 77. Under the action of the third fan 78, the airflow flowing through the third air passage 77 generates the fourth heating element 76. The heat is discharged to the outside of the projection device 100. The restrictor plate 72 is disposed at the air inlet 621 of the first air duct 62, and is bent and extended toward the second air duct 73 for preventing the second air duct 73 or the third air duct 77 from being blocked. The outflowing gas is directly sucked into the first duct 62, and the area of the air inlet 621 is increased, so that the outside cold air is better introduced into the first duct 62.

It can be understood that, in other embodiments, the heat dissipating component 64 may be omitted, and the airflow discharged by the first fan 63 flows substantially perpendicularly to a central position of the main heat generating surface of the first heat generating component, thereby directly The central position of the first heating element is used to dissipate heat.

It can be understood that in other embodiments, the two airflows shunted through the heat dissipation component 64 can flow out in two opposite directions. For example, the heat dissipation component 64 includes a plurality of heat dissipation fins 642 disposed in parallel. The heat dissipation fin 642 has a V shape.

The heat dissipation system 200 of the present invention, by providing the first fan 63 substantially at the center position of the main heat generating surface of the first heat generating component, directly directs the cold air absorbed by the first fan 63 to the first heat. The central position of the main heat generating surface of the element is dissipated to improve the heat dissipation efficiency of the first heat generating element. At the same time, the direction of the airflow discharged from the first air duct 62 is substantially perpendicular to the plane of the plurality of heat dissipation fins 642 disposed in parallel with the heat dissipation component 64, and between the two adjacent heat dissipation fins 642 is formed. The air flow passage causes the airflow discharged from the first air duct 62 to flow substantially perpendicularly to a central position of the plane where the heat dissipation fins 642 are located, and the airflow flowing into the heat dissipation assembly 64 is a plane where the heat dissipation fins 642 are located. The center position is divided along the extending direction of the air flow passage so that two opposite air flows out of the heat dissipation assembly 64, thereby further improving the heat dissipation efficiency of the first heat generating component. The third heating element 75 and the fourth heating element 76 are respectively disposed in the second air channel 73 and the third air channel 77, which simplifies the heat dissipation while improving the overall heat dissipation efficiency of the heat dissipation system 200. The structure of system 200.

The above embodiments are only used to illustrate the technical solution of the present invention and are not limited. In addition, it can be seen that the heat dissipation of the heat generating component in other types of devices can also refer to the heat dissipation system provided by the present invention. Although the present invention has been described in detail with reference to the preferred embodiments thereof, those skilled in the art should understand that the modifications and equivalents of the present invention may be made without departing from the spirit and scope of the present invention.

<this creation>
100‧‧‧Projection device
200‧‧‧heating system
10‧‧‧Light source
20‧‧‧ color wheel
30‧‧‧Optical Relay System
40‧‧‧Light Modulator
50‧‧‧Projection lens unit
60‧‧‧Channel components
61‧‧‧ boards
62‧‧‧First air duct
621‧‧‧air inlet
623‧‧‧air outlet
63‧‧‧First fan
64‧‧‧Heat components
642‧‧‧heat fins
65‧‧‧second fan
66‧‧‧Control panel bracket
72‧‧‧Limitor
73‧‧‧Second air duct
74‧‧‧Second heating element
75‧‧‧ Third heating element
76‧‧‧Four heating element
77‧‧‧ Third airway
78‧‧‧third fan

FIG. 1 is a structural diagram of an optical path of a projection apparatus according to the present invention. 2 is a partial structural schematic view of a first embodiment of the heat dissipation system of the present invention. FIG. 3 is a partial structural schematic view of a second embodiment of the heat dissipation system of the present invention.

60‧‧‧Channel components

61‧‧‧ boards

62‧‧‧First air duct

63‧‧‧First fan

64‧‧‧Heat components

65‧‧‧second fan

66‧‧‧Control panel bracket

621‧‧‧air inlet

623‧‧‧air outlet

642‧‧‧heat fins

40‧‧‧Light Modulator

200‧‧‧heating system

Claims (10)

A heat dissipation system includes: a duct assembly having a first air duct formed in the air duct assembly; a first fan disposed in the first air duct; and a first heat generating component disposed in the air duct The first air duct is outside; wherein the airflow discharged by the first fan is substantially perpendicular to a central position of the main heat generating surface of the first heat generating component. The heat dissipation system of claim 1, further comprising a heat dissipating component disposed between the first heat generating component and the first fan and thermally insulated from a main heat generating surface of the first heat generating component Connecting; wherein the airflow discharged by the first fan flows into the heat dissipating component, and is guided through the heat dissipating component to flow out from two airflow outflow directions different from the inflow direction of the airflow. The heat dissipation system of claim 2, wherein the two airflow outflow directions are oppositely disposed, and are respectively disposed substantially perpendicular to an inflow direction of the airflow. The heat dissipation system of claim 3, wherein the heat dissipation component comprises a plurality of heat dissipation fins disposed in parallel, and an air flow passage is formed between each adjacent two heat dissipation fins, and flows along the airflow. The straight line extending in the direction of the heat sink is substantially perpendicular to the plane in which the heat sink fins are located; wherein the airflow flowing into the heat sink assembly is guided through the air flow channels to flow out from two opposite directions extending along the heat sink fins. The heat dissipation system of claim 2, wherein the heat dissipation system is further provided with a second air passage and a third air passage for respectively circulating two air flows flowing out through the heat dissipation assembly. The heat dissipation system of claim 5, wherein the heat dissipation system further comprises a current limiting plate disposed at an air inlet of the first air passage for preventing passage through the second air passage or The airflow flowing out of the third air passage is drawn into the first air passage. The heat dissipation system of claim 1, wherein the air duct assembly comprises a plurality of panels connected to each other, the side walls of the panels defining the first air duct. The heat dissipation system of claim 7, wherein at least one of the plates is made of a heat conductive material; wherein the heat dissipation system further comprises a heat of the plate member made of the heat conductive material. A second heating element connected. The heat dissipation system of claim 7, wherein the panels are made of a heat insulating material. A projection apparatus comprising the heat dissipation system according to any one of claims 1 to 9.