WO2015074287A1 - 散热回路管及用该散热回路管的背光模组 - Google Patents
散热回路管及用该散热回路管的背光模组 Download PDFInfo
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- WO2015074287A1 WO2015074287A1 PCT/CN2013/088083 CN2013088083W WO2015074287A1 WO 2015074287 A1 WO2015074287 A1 WO 2015074287A1 CN 2013088083 W CN2013088083 W CN 2013088083W WO 2015074287 A1 WO2015074287 A1 WO 2015074287A1
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- WIPO (PCT)
- Prior art keywords
- pipeline
- evaporation part
- heat dissipation
- liquid
- gas
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Definitions
- Liquid Crystal Display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
- Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal display panel and a backlight module.
- the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energizing or not, and the light of the backlight module is changed. Refracted to produce a picture. Since the liquid crystal display panel itself does not emit light, the light source provided by the backlight module is required to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
- the backlight module is divided into a side-lit backlight module and a direct-lit backlight module according to different light source injection positions.
- the direct type backlight module the light source is disposed behind the liquid crystal display panel, and the surface light source is directly formed and supplied to the liquid crystal display panel.
- the side-lit backlight module is disposed on the edge of the back panel behind the liquid crystal display panel, and the light emitted by the light source enters the light guide plate from the light-incident surface of the light guide plate (LGP) side, and is reversed. After the radiation and diffusion, the light-emitting surface of the light guide plate is emitted, and then passed through the optical film group to form a surface light source to be supplied to the liquid crystal display panel.
- LED Light Emitting Diode
- a heat circuit tube is usually disposed under a printed circuit board (PCB) on which a plurality of LED lamps are mounted to dissipate heat of the LED lamp.
- PCB printed circuit board
- FIG. 1 is a schematic structural diagram of a conventional LED heat dissipation loop tube.
- the heat dissipation loop tube is an alloy tube made of a metal such as copper or titanium, and includes a liquid tube 100 , an evaporation portion 300 , and a gas.
- the tube 500 and the condensing tube 700 are provided with a heat-dissipating liquid (including water, Freon refrigerant, ammonia, methanol, etc.) which is easy to absorb heat and volatilize, and the heat-dissipating liquid flows into the evaporation portion 300 through the liquid tube 100 to absorb heat and volatilize.
- Gas enter gas tube 500, and then condense After the tube 700 is condensed into a liquid, it is again introduced into the liquid tube 100, so that it can be used repeatedly to enhance the heat dissipation effect.
- the heat dissipation loop tube of the structure achieves a better heat dissipation effect, when the number of LED lamps to be dissipated in the backlight module is large, the number of heat dissipation loop tubes to be installed is also large.
- FIG. 2 is a schematic diagram of the installation of an existing LED heat dissipation loop tube.
- the side-lit backlight module has two sets of backlights 900 disposed oppositely.
- Each backlight 900 includes a printed circuit board.
- 902 A plurality of LED lamps 904 mounted on the printed circuit board 902, so that the backlight module of the structure uses four identical heat dissipation circuit tubes for heat dissipation, and two heat dissipation circuit tubes are disposed under each of the printed circuit boards 902 for The LED lamp thereon dissipates heat, and the printed circuit board 902 abuts against the evaporation portion 300 of the heat dissipation circuit tube during installation.
- the heat dissipation circuit tube of the structure makes the number of heat dissipation components required in the existing backlight module more, increases the heat dissipation cost and the production cost, and is complicated in operation during assembly. Summary of the invention
- the object of the present invention is to provide a heat-dissipating circuit tube, which can be operated during assembly, and which ensures that the backlight module 3 is provided with a heat-dissipating circuit, and the assembly is simple and easy to ensure.
- Good heat dissipation effect a heat-dissipating liquid can realize heat dissipation of two sets of backlights, reducing the number of required heat-dissipating liquids and reducing production costs.
- the present invention provides a heat dissipation circuit tube, comprising: a first evaporation portion, a second evaporation portion disposed opposite to the first evaporation portion, and a first connection with the first evaporation portion and the second evaporation portion a pipeline, a second pipeline connected to the first evaporation portion and the second evaporation portion and disposed opposite to the first pipeline, and a heat dissipation liquid disposed in the first pipeline and the second pipeline
- the first evaporation portion, the first conduit, the second evaporation portion and the second conduit are connected end to end in sequence to form a closed circuit;
- the first conduit includes a first gas conduit connecting the first evaporation portion, and the connection portion a first condensation line of a gas line and a first liquid line connecting the first condensation line and the second evaporation portion;
- the second line includes a second gas line connecting the second evaporation portion, and the connection a second condensation line of the two gas lines and a second liquid
- the first evaporation portion includes a first compensation chamber adjacent to the second liquid pipeline, a first liquid chamber located in front of the first compensation chamber, and a first baffle disposed in front of the first liquid chamber.
- a first capillary body mounted on the first baffle, a first gas passage above the first capillary body and a first heat transfer layer on the first gas passage;
- the second evaporation portion includes a proximity a second compensation chamber of a liquid line, a second liquid chamber in front of the second compensation chamber, a second baffle disposed in front of the second liquid chamber, and a second device mounted on the second baffle Capillary, one located in the second a second gas passage above the capillary and a second heat transfer layer on the second gas passage.
- the heat dissipating liquid is composed of water, Freon refrigerant, ammonia and sterol.
- the first conduit and the second conduit route copper. At least one of titanium is made.
- the present invention also provides a backlight module using a heat dissipation loop tube, comprising: a back plate, a light guide plate disposed in the back plate, two backlights disposed in the back plate, and disposed between the back plate and the backlight a first line connecting the first evaporation portion and the second evaporation portion to the first evaporation portion and the first evaporation portion and the first evaporation portion a second pipeline and a heat dissipating liquid disposed in the first pipeline and the second pipeline, the first evaporation portion, the first pipeline, the second evaporation portion and the second pipeline are connected end to end in sequence Forming a closed circuit;
- the first pipeline includes a first gas line connecting the first evaporation portion, a first condensation line connecting the first gas line, and a first condensation line and a second evaporation portion a first liquid line;
- the second line includes a second gas line connecting the second evaporation portion, a second condensation line connecting the second gas line, and
- the first evaporation portion includes a first replenishing chamber adjacent to the second liquid pipeline, a first liquid chamber located in front of the first compensation chamber, a first baffle disposed in front of the first liquid chamber, and a first baffle a first capillary body mounted on the first baffle, a first gas passage above the first capillary body and a first heat transfer layer on the first gas passage;
- the second evaporation portion includes a proximity a second compensation chamber of a liquid line, a second liquid chamber in front of the second compensation chamber, a second baffle disposed in front of the second liquid chamber, and a second device mounted on the second baffle
- Each of the backlights includes a printed circuit board and a plurality of LED lamps mounted and electrically connected to the printed circuit board, and the two printed circuit boards of the two backlights directly abut the first heat transfer layer and On the second heat transfer layer.
- the heat dissipating liquid is composed of water, Freon refrigerant, ammonia, and methanol.
- the first conduit and the second conduit are made of at least one of copper and titanium.
- the backplane includes a bottom plate and a plurality of side plates vertically connected to the bottom plate, the bottom plate includes a first bottom plate and two second bottom plates arranged in a stepped manner with the first bottom plate, the printed circuit board and the heat dissipation circuit tube An evaporation portion and a second evaporation portion are disposed on the second bottom plate and an upper surface of the printed circuit board is flush with an upper surface of the first bottom plate.
- the present invention also provides a backlight module using a heat dissipation loop tube, comprising: a back plate, a light guide plate disposed in the back plate, two backlights disposed in the back plate, and disposed between the back plate and the backlight a heat dissipation circuit tube and a reflection sheet disposed between the back plate and the light guide plate,
- the heat dissipation circuit tube includes: a first evaporation portion, a second evaporation portion disposed opposite to the first evaporation portion, and the first evaporation portion And second steaming a first pipeline connected to the hair portion, a second pipeline connected to the first evaporation portion and the second evaporation portion and disposed opposite to the first pipeline, and disposed in the first pipeline and the second pipeline
- the first evaporation portion, the first conduit, the second evaporation portion and the second conduit are sequentially connected end to end to form a closed circuit;
- the first conduit includes a first gas connected to the first evaporation portion
- the first evaporation portion includes a first compensation chamber adjacent to the second liquid pipeline, a first liquid chamber located in front of the first compensation chamber, and a first baffle disposed in front of the first liquid chamber.
- a first capillary disposed on the first baffle, a first gas passage above the first capillary, and a first heat transfer layer on the first gas passage;
- the second evaporation portion includes a a second compensation chamber adjacent to the first liquid pipeline, a second liquid chamber in front of the second compensation chamber, a second baffle disposed in front of the second liquid chamber, and a second baffle mounted on the second baffle a second capillary, a second gas passage above the second capillary and a second heat transfer layer on the second gas passage.
- Each of the backlights includes a printed circuit board and a plurality of LED lamps mounted and electrically connected to the printed circuit board, and the two printed circuit boards of the two backlights directly abut the first heat transfer layer and the first Two heat transfer layers.
- the heat dissipating liquid is composed of water, Freon refrigerant, ammonia, and methanol.
- the first conduit and the second conduit are made of at least one of copper and titanium.
- the backplane includes a bottom plate and a plurality of side plates vertically connected to the bottom plate, the bottom plate includes a first bottom plate and two second bottom plates arranged in a stepped manner with the first bottom plate, the printed circuit board and the heat dissipation circuit tube An evaporation portion and a second evaporation portion are disposed on the second bottom plate and an upper surface of the printed circuit board is flush with an upper surface of the first bottom plate.
- the assembly operation is simple, and only one heat-dissipating liquid can be injected therein to realize heat dissipation of a plurality of LED lamps on two sets of backlights, thereby ensuring better heat dissipation effect and reducing production cost of the heat dissipation loop tube and the backlight module.
- FIG. 1 is a schematic structural view of a conventional heat dissipation circuit tube
- FIG. 2 is a schematic view showing the installation of a conventional heat dissipation circuit tube
- FIG. 3 is a schematic structural view of a heat dissipation loop tube of the present invention.
- FIG. 4 is a schematic structural view of a first evaporation portion in a heat dissipation loop tube of the present invention
- FIG. 5 is a schematic structural view of a second evaporation portion in a heat dissipation loop pipe of the present invention.
- FIG. 6 is a schematic structural view of a backlight module using a heat dissipation loop tube according to the present invention.
- Figure 7 is a schematic view showing the installation of the heat dissipation circuit tube of the present invention. Specific. The way of travel.
- the present invention provides a heat dissipation loop tube, comprising: a first evaporation portion 2, a second evaporation portion 4 disposed opposite to the first evaporation portion 2, and the first evaporation portion 2 and the second evaporation portion.
- a first conduit 6 connected to the portion 4
- a second conduit 8 connected to the first evaporation portion 2 and the second evaporation portion 4 and disposed opposite the first conduit 6, and a first conduit 6 disposed in the first conduit 6
- a heat dissipating liquid in the second conduit 8 , the first evaporation portion 2 a heat dissipating liquid in the second conduit 8 , the first evaporation portion 2 .
- the first conduit 6, the second evaporation portion 4 and the second conduit 8 are connected end to end in sequence to form a closed circuit, and the first conduit 6 includes a first gas conduit 62 connected to the first evaporation portion 2, and a connection portion a first condensing line 64 of a gas line 62 and a first liquid line 66 connecting the first condensing line 64 and the second evaporation portion 4, the second line 8 including a portion connecting the second evaporation portion 4
- the first condensation line 64 has a shape
- the second condensation line 84 has a U-shaped structure.
- the first line 6 and the second line 8 are symmetrically arranged in structure.
- the function of the symmetrical portion is not the same.
- the first condensing line 64 and the second condensing line 84 are oppositely recessed to reduce the entire first line 6 and The length of the second pipe 8 reduces the occupied area of the entire heat-dissipating circuit pipe.
- the first conduit 6 and the second conduit 8 are made of at least one of copper and titanium.
- the first conduit 6 and the second conduit 8 are made of copper or a titanium alloy.
- the heat dissipating liquid is injected into the tube when the heat dissipating circuit tube is fabricated, and the environment for injecting the heat dissipating liquid into the heat dissipating circuit tube is a vacuum environment during manufacture, so as to prevent the gas in the air from entering the heat dissipating circuit.
- the space inside the tube is occupied by the tube
- the heat dissipating liquid is composed of water, Freon refrigerant, ammonia and decyl alcohol, and the heat dissipating liquid flows in the direction of the arrow in Fig. 3 in the heat dissipating circuit tube.
- the first evaporation portion 2 includes a first compensation chamber 22 adjacent to the second liquid line 86, and a first liquid chamber located in front of the first compensation chamber 22. 23, a first baffle 24 disposed in front of the first liquid chamber 23, a first capillary body 25 mounted on the first baffle 24, a first gas passage 26 located above the first capillary body 25, and a a first heat transfer layer 27 on the first gas passage 26;
- the second evaporation portion 4 includes a second compensation chamber 42 adjacent to the first liquid line 66, and a second portion in front of the second compensation chamber 42 a second liquid chamber 43, a second baffle 44 disposed in front of the second liquid chamber 43, a second capillary 45 mounted on the second baffle 44, and a second gas passage above the second capillary 45 46 and a second heat transfer layer 47 on the second gas passage 46.
- the heat-dissipating liquid flows in the direction of the arrow in Fig. 4, and in the second evaporation portion 4, the heat-dissipating liquid flows in the direction of the arrow in Fig. 5.
- the heat dissipation liquid body flows from the second liquid pipe 86 into the first replenishing chamber 22 of the first evaporation portion 2 connected to the second liquid pipe 86, and sequentially passes through the first evaporation portion 2
- the first liquid chamber 23 and the first capillary body 25 absorb the heat transferred by the first heat transfer layer 27 into a gas, and the heat dissipation liquid evaporated into the gas flows through the first gas passage 26 of the first evaporation portion 2 and
- the first gas line 62 connected to the first evaporation portion 2 is then condensed into a liquid through the first condensation line 64 connected to the first gas line 62, into the first liquid line 66, and then into the first
- the two evaporation portions 4 can realize repeated recycling of the heat dissipating liquid, thereby ensuring a relatively low heat dissipation effect, and a heat dissipating liquid in the structure can be recycled by the two evaporation portions, thereby reducing the number of parts of the required heat dissipating
- the present invention provides a backlight module using a heat dissipation loop tube, including: a backboard 20.
- the light guide plate 40 disposed in the back plate 20, the two backlights 60 disposed in the back plate 20, the heat dissipation circuit tube 200 disposed between the back plate 20 and the backlight 60, and the back plate 20 and the light guide plate 40 Reflective sheet 80 between.
- Each backlight 60 includes a printed circuit board 602 and a plurality of LED lights 604 mounted and electrically coupled to the printed circuit board 602.
- the heat dissipation circuit tube 200 includes: a first evaporation portion 2, a second evaporation portion 4 disposed opposite to the first evaporation portion 2, and a first conduit connected to the first evaporation portion 2 and the second evaporation portion 4 6.
- the second conduit 8 connected to the first evaporation portion 2 and the second evaporation portion 4 and disposed opposite to the first conduit 6 and disposed in the first conduit 6 and the second conduit 8 Heat dissipation liquid, the first The evaporation portion 2, the first conduit 6, the second evaporation portion 4 and the second conduit 8 are sequentially connected end to end to form a closed circuit, and the first conduit 6 includes a first gas conduit connecting the first evaporation portion 2.
- the first condensation line 64 has a shape
- the second condensation line 84 has a U-shaped structure.
- the first line 6 and the second line 8 are symmetrically arranged in structure. However, the function of the symmetrical portion is not the same.
- the first condensing line 64 and the second condensing line 84 are oppositely recessed to reduce the entire first line 6 and The length of the second pipe 8 reduces the occupied area of the entire heat dissipation circuit pipe.
- the first conduit 6 and the second conduit 8 are made of at least one of copper and titanium.
- the first conduit 6 and the second conduit 8 are made of copper or a titanium alloy.
- the heat dissipating liquid is injected into the tube when the heat dissipating circuit tube is fabricated, and the environment for injecting the heat dissipating liquid into the heat dissipating circuit tube is a vacuum environment during manufacture, so as to prevent the gas in the air from entering the space occupying the tube in the heat dissipating circuit tube.
- the heat dissipating liquid is composed of water, Freon refrigerant, ammonia, methanol, etc., and the heat dissipating liquid flows in the direction of the arrow in Fig. 3 in the heat dissipating circuit tube.
- the first evaporation portion 2 includes a first compensation chamber 22 adjacent to the second liquid line 86 , and a first liquid chamber located in front of the first compensation chamber 22 . 23, a first baffle 24 disposed in front of the first liquid chamber 23, a first capillary body 25 mounted on the first baffle 24, a first gas passage 26 located above the first capillary body 25, and a a first heat transfer layer 27 on the first gas passage 26;
- the second evaporation portion 4 includes a second compensation chamber 42 adjacent to the first liquid line 66, and a second portion in front of the second compensation chamber 42 a second liquid chamber 43, a second baffle 44 disposed in front of the second liquid chamber 43, a second capillary 45 mounted on the second baffle 44, and a second gas above the second capillary 45
- the path 46 and a second heat transfer layer 47 on the second gas passage 46 is a first compensation chamber 22 adjacent to the second liquid line 86 , and a first liquid chamber located in front of the first compensation chamber 22 . 23, a first ba
- the heat-dissipating liquid flows in the direction of the arrow in Fig. 4, and in the second evaporation portion 4, the heat-dissipating liquid flows in the direction of the arrow in Fig. 5
- the first liquid passing through the first evaporating portion 2 is sequentially passed.
- the cavity 23 and the first capillary body 25 absorb the heat transferred by the first heat transfer layer 27 into a gas, and the heat dissipation liquid evaporated into the gas passes through the first gas passage of the first evaporation portion 2 26 flows into the first gas line 62 connected to the first evaporation portion 2, and then condenses into a liquid through the first condensation line 64 connected to the first gas line 62, enters the first liquid line 66, and then
- the second evaporation portion 4 can realize repeated recycling of the heat dissipation liquid, thereby ensuring better heat dissipation effect, and a heat dissipation liquid in the structure can be used for recycling two evaporation portions, thereby reducing the number of required heat dissipation liquids.
- the production cost is reduced
- the two printed circuit boards 602 of the two backlights 60 are directly on the first heat transfer layer 27 and the second heat transfer layer 47, respectively.
- the heat dissipation circuit tube of the structure can realize the heat dissipation of the two sets of backlights 60 by only one heat dissipation liquid, reduces the number of required heat dissipation liquids, reduces the production cost, and is formed by integrally forming all the components constituting the heat dissipation circuit tube. , Easy to operate when assembled.
- the backplane 20 includes a bottom plate 202 and a plurality of side plates 204 vertically connected to the bottom plate 202.
- the bottom plate 202 includes a first bottom plate 222 and two second bottom plates 224 arranged in a stepped manner with the first bottom plate 222.
- the first evaporation portion 2 and the second evaporation portion 4 of the printed circuit board 602 and the heat dissipation circuit tube 200 are disposed on the second bottom plate 224, and the upper surface of the printed circuit board 602 is flush with the upper surface of the second bottom plate 222.
- the bottom plate 202 of the backboard is further provided with a pipeline groove (not shown) relative to the first and second pipelines 2, 4 of the heat dissipation loop tube 200, and the heat dissipation loop tube 200 is further mounted on the back. Inside the board 20.
- the heat dissipation circuit tube of the present invention and the backlight module using the heat dissipation circuit tube integrally form all the components of the heat dissipation circuit tube, and the assembly operation of the backlight module using the heat dissipation circuit tube is simple. And only need to inject a heat dissipating liquid into it to realize heat dissipation of multiple LED lights on the two sets of backlights, ensuring better heat dissipation effect and reducing the production cost of the heat dissipation loop tube and the backlight module.
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Abstract
一种散热回路管及用该散热回路管的背光模组,散热回路管包括:第一蒸发部(2)、与第一蒸发部(2)相对设置的第二蒸发部(4)、第一管路(6)、与第一管路(6)相对设置的第二管路(8)及设于第一管路(6)与第二管路(8)内的散热液体。第一蒸发部(2)、第一管路(6)、第二蒸发部(4)与第二管路(8)依次首尾连接,形成一密闭回路。第一管路(6)包括连接第一蒸发部(2)的第一气体管路(62)、连接第一气体管路(62)的第一冷凝管路(64)及连接第一冷凝管路(64)与第二蒸发部(4)的第一液体管路(66),第二管路(8)包括连接第二蒸发部(4)的第二气体管路(82)、连接第二气体管路(82)的第二冷凝管路(84)及连接第二冷凝管路(84)与第一蒸发部(2)的第二液体管路(86)。还公开了包括散热回路管的背光模组。
Description
热回路管及用该散热回路管的背光模组
背光模组,
液晶显示装置 ( Liquid Crystal Display, LCD )具有机身薄、 省电、 无 辐射等众多优点, 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示装置, 其包括液晶显示面板及背光模组 (backlight module ) 。 液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液 晶分子, 两片玻璃基板中间有许多垂直和水平的细小电线, 通过通电与否 来控制液晶分子改变方向, 将背光模组的光线折射出来产生画面。 由于液 晶显示面板本身不发光, 需要借由背光模组提供的光源来正常显示影像, 因此, 背光模组成为液晶显示装置的关键组件之一。 背光模组依照光源入 射位置的不同分成侧入式背光模组与直下式背光模组两种。 直下式背光模 组是将发光光源设置在液晶显示面板后方, 直接形成面光源提供给液晶显 示面板。 而侧入式背光模组是将发光光源设于液晶显示面板侧后方的背板 边缘, 发光光源发出的光线从导光板 ( Light Guide Plate, LGP )一侧的入 光面进入导光板, 经反.射和扩散后从导光板出光面射出, 再经由光学膜片 组, 以形成面光源提供给液晶显示面板。
目前, 常见的发光光源有冷阴极萤光灯管 ( Cold Cathode Fluorescent Lam , CCFL ) 夕卜.置电极 '安光 : (External Electrode Fluorescent Lamp, EEFL )及发光二极管 ( Light Emitting Diode, LED ) , 其中, LED由于具 有环保、 使用寿命长等优点, 得到了广泛的应用, 而用于 LED散热的散 热装置是防止背光模组性能恶化、 延长背光模组寿命的的重要部分。
现有技术中, 通常采用在安装有数个 LED 灯的印劇电路板(Printed Circuit Board, PCB ) 下方设置- 热回路管, 实现 LED灯的散热。
请参阅图 1, 为现有的一种 LED散热回路管的结构示意图, 该散热回 路管是由铜、 钛等金属制成的合金管, 其包括一液体管 100、 一蒸发部 300, 一气体管 500以及- 冷凝管 700, 散热回路管内注有易吸热挥发的散 热液体 (包括水、 氟利昂制冷剂、 氨、 甲醇等) , 该散热液体经液体管 100 流入蒸发部 300后吸收热量挥发成气体, 进入气体管 500, 再经冷凝
管 700冷凝成液体后又再次进入液体管 100, 如此可反复使用, 提升散热 效果。
该结构的散热回路管虽然实现了较好的散热效果, 但当背光模组中待 散热的 LED灯较多时, 其所需安装的散热回路管的个数也较多。
请参阅图 2, 为现有的一种 LED散热回路管的安装示意图, 通常侧入 式背光模组具有相对设置的两组背光源 900, 每一背光源 900 包括一印劇 电路板. 902及安装于该印刷电路板 902上的数个 LED灯 904, 因而在该结 构的背光模组采用四个相同的散热回路管散热, 每一印刷电路板 902 下方 设有两个该散热回路管用于给其上的 LED灯散热, 安装时印刷电路板 902 抵靠于散热回路管的蒸发部 300。
因而, 该结构的散热回路管使现有的背光模组中所需的散热元件个数 较多, 增加了散热成本和生产成本, 且, 组装时操作复杂。 发明内容
本发明的目的在于提供一种散热回路管, 组装时操作筒便, 保证了较 ':发明 ^另 目的在于提供一种用散热回路 ^的背光 3模组, 组装时搡 作简便, 保证了较好的散热效果, 一份散热液体即可实现两组背光源散 热, 减少了所需散热液体的份数, 降低了生产成本。
为实现上述目的, 本发明提供一种散热回路管, 包括: 一第一蒸发 部、 与第一蒸发部相对设置的第二蒸发部、 与所述第一蒸发部及第二蒸发 部相连的第一管路、 与所述第一蒸发部及第二蒸发部相连并与第一管路相 对设置的第二管路及设于所述第一管路与第二管路内的散热液体, 所述第 一蒸发部、 第一管路、 第二蒸发部与第二管路依次首尾连接, 形成一密闭 回路; 所述第一管路包括连接第一蒸发部的第一气体管路、 连接第一气体 管路的第一冷凝管路及连接第一冷凝管路与第二蒸发部的第一液体管路; 所述第二管路包括连接第二蒸发部的第二气体管路、 连接第二气体管路的 第二冷凝管路及连接第二冷凝管路与第一蒸发部的第二液体管路。
所述第一蒸发部包括一靠近第二液体管路的第一补偿腔、 一位于所述 第一补偿腔前的第一液体腔, 一设于第一液体腔前的第一挡板、 一安装于 第一挡板上的第一毛细体、 一位于第一毛细体上方的第一气体通道及一位 于第一气体通道上的第一热量传递层; 所述第二蒸发部包括一靠近第一液 体管路的第二补偿腔、 一位于所述第二补偿腔前的第二液体腔、 一设于第 二液体腔前的第二挡板、 一安装于第二挡板上的第二毛细体、 一位于第二
毛细体上方的第二气体通道及一位于第二气体通道上的第二热量传递层。 所述散热液体由水, 氟利昂制冷剂、 氨及.曱醇组成。
所述第一管路与第二管路由铜。 钛至少一种制成。
本发明还提供一种用散热回路管的背光模组, 包括: 背板、 设于背板 内的导光板、 设于背板内的两个背光源、 设于背板与背光源之间的散热回 部 f与第一蒸发 相对设置 第 蒸发 Γ·ί所 第 蒸发部及^二蒸 发部相连的第一管路, 与所述第一蒸发部及第二蒸发部相连并与第一管路 相对设置的第二管路及设于所述第一管路与第二管路内的散热液体, 所述 第一蒸发部、 第一管路、 第二蒸发部与第二管路依次首尾连接, 形成一密 闭回路; 所述第一管路包括连接第一蒸发部的第一气体管路、 连接第一气 体管路的第一冷凝管路及连接第一冷凝管路与第二蒸发部的第一液体管 路; 所述第二管路包括连接第二蒸发部的第二气体管路、 连接第二气体管 路的第二冷凝管路及连接第二冷凝管路与第一蒸发部的第二液体管路。
所述第一蒸发部包括一靠近第二液体管路的第一 偿腔、 一位于所述 第一补偿腔前的第一液体腔、 一设于第一液体腔前的第一挡板、 一安装于 第一挡板上的第一毛细体、 一位于第一毛细体上方的第一气体通道及一位 于第一气体通道上的第一热量传递层; 所述第二蒸发部包括一靠近第一液 体管路的第二补偿腔、 一位于所述第二补偿腔前的第二液体腔、 一设于第 二液体腔前的第二挡板、 一安装于第二挡板上的第二毛细体、 一位于第二 毛细体上方的第二气体通道及一位于第二气体通道上的第二热量传递层。
每一背光源包括一印刷电路板及安装并电性连接于印刷电路板上的数 个 LED 灯, 所述两背光源的两印剧电路板分别直接抵靠于所述第一热量 传递层与第二热量传递层上。
所述散热液体由水、 氟利昂制冷剂、 氨及甲醇组成。
所述第一管路与第二管路由铜、 钛至少一种制成。
所述背板包括底板及垂直连接于底板的数个侧板, 所述底板包括第一 底板及两与第一底板呈台阶型设置的第二底板, 所述印刷电路板及散热回 路管的第一蒸发部与第二蒸发部设于第二底板上且所述印刷电路板的上表 面与所述第一底板的上表面平齐。
本发明还提供一种用散热回路管的背光模组, 包括: 背板、 设于背板 内的导光板、 设于背板内的两个背光源、 设于背板与背光源之间的散热回 路管及设于背板与导光板之间的反射片, 所述散热回路管包括: 一第一蒸 发部、 与第一蒸发部相对设置的第二蒸发部、 与所述第一蒸发部及第二蒸
发部相连的第一管路, 与所述第一蒸发部及第二蒸发部相连并与第一管路 相对设置的第二管路及设于所述第一管路与第二管路内的散热液体, 所述 第一蒸发部、 第一管路、 第二蒸发部与第二管路依次首尾连接, 形成一密 闭回路; 所述第一管路包括连接第一蒸发部的第一气体管路、 连接第一气 体管路的第一冷凝管路及连接第一冷凝管路与第二蒸发部的第一液体管 路; 所述第二管路包括连接第二蒸发部的第二气体管路、 连接第二气体管 路的第二冷凝管路及连接第二冷凝管路与第一蒸发部的第二液体管路, 所 述两背光源分别设于所述第一蒸发部与第二蒸发部上;
其中, 所述第一蒸发部包括一靠近第二液体管路的第一补偿腔、 一位 于所述第一补偿腔前的第一液体腔、 一设于第一液体腔前的第一挡板、 一 安装于第一挡板上的第一毛细体、 一位于第一毛细体上方的第一气体通道 及一位于第一气体通道上的第一热量传递层; 所述第二蒸发部包括一靠近 第一液体管路的第二补偿腔, 一位于所述第二补偿腔前的第二液体腔、 一 设于第二液体腔前的第二挡板、 一安装于第二挡板上的第二毛细体, 一位 于第二毛细体上方的第二气体通道及一位于第二气体通道上的第二热量传 递层。
每一背光源包括一印刷电路板及安装并电性连接于印刷电路板上的数 个 LED 灯, 所述两背光源的两印刷电路板分别直接抵靠于所述第一热量 传递层与第二热量传递层上。
所述散热液体由水、 氟利昂制冷剂、 氨及甲醇组成。
所述第一管路与第二管路由铜、 钛至少一种制成。
所述背板包括底板及垂直连接于底板的数个侧板, 所述底板包括第一 底板及两与第一底板呈台阶型设置的第二底板, 所述印刷电路板及散热回 路管的第一蒸发部与第二蒸发部设于第二底板上且所述印刷电路板的上表 面与所述第一底板的上表.面平齐。
本发明的有益效杲: 本发明的散热回路管及用该散热回路管的背光模 组, 构成该散热回路管的所有元件一体成型制成, 进,¾使用该散热回路管 的背光模组的组装操作简便, 且只需在其内注入一份散热液体即可实现两 组背光源上的多个 LED 灯散热, 保证了较好的散热效果, 降低了散热回 路管及背光模组的生产成本。
为了能更进一步了解本发明的特征以及技术内容, 请参阔以下有关本 发明的详细说明与附图, 然而附图仅提供参考与说明用, 并非用来对本发 明加以限制。
附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其它有益效果显而易见。
附图中,
图 1为现有散热回路管的结构示意图;
图 2为现有散热回路管的安装示意图;
图 3为本发明散热回路管的结构示意图;
图 4为本发明散热回路管中的第一蒸发部的结构示意图;
图 5为本发明散热回路管中的第二蒸发部的结构示意图;
图 6为本发明用散热回路管的背光模组的结构示意图;
图 7为本发明散热回路管的安装示意图。 具体.实旅方式.
为更进一步阐述本发明所釆取.的技术手段及.其效果, 以下结合本发明 的俛选实施例及其附图进行详细描述。
请参阅图 3 , 本发明提供一种散热回路管, 包括: 一第一蒸发部 2、 与第一蒸发部 2相对设置的第二蒸发部 4、 与所述第一蒸发部 2及第二蒸 发部 4相连的第一管路 6、 与所述第一蒸发部 2及第二蒸发部 4相连并与 第一管路 6相对设置的第二管路 8及设于所述第一管路 6与第二管路 8内 的散热液体, 所述第一蒸发部 2。 第一管路 6、 第二蒸发部 4与第二管路 8 依次首尾连接, 形成一密闭回路, 所述第一管路 6 包括连接第一蒸发部 2 的第一气体管路 62、 连接第一气体管路 62的第一冷凝管路 64及连接第一 冷凝管路 64与第二蒸发部 4的第一液体管路 66, 所述第二管路 8包括连 接第二蒸发部 4的第二气体管路 82、 连接第二气体管路 82的第二冷凝管 路 84及连接第二冷凝管路 84与第一蒸发部 2 的第二液体管路 86。 优选 的, 所述第一冷凝管路 64呈 形结构, 所述第二冷凝管路 84 同样呈 "U" 形结构, 在结构上该第一管路 6与第二管路 8呈对称结构设置, 但 其相对称的部位的功能却不尽相同, 在本实施例中, 所述第一冷凝管路 64 与第二冷凝管路 84相对内凹设置, 以降低整条第一管路 6 与第二管路 8 的长度, 降低整个散热回路管的占用面积。
所述第一管路 6与第二管路 8由铜、 钛至少一种制成。 本实施例中, 所述第一管路 6与第二管路 8由铜、 钛合金制成。
所述散热液体在散热回路管制作时注入管内, 且制作时, 向散热回路 管内注入散热液体的环境为真空环境, 以避免空气中的气体进入散热回路
管内占用管内的空间
所述散热液体由水、 氟利昂制冷剂、 氨及曱醇等组成, 该散热液体在 散热回路管内按图 3中的箭头方向流动。
具体地, 请参阅图 4及图 5, 所述第一蒸发部 2 包括一靠近第二液体 管路 86 的第一补偿腔 22、 一位于所述第一朴偿腔 22 前的第一液体腔 23、 一设于第一液体腔 23前的第一挡板 24、 一安装于第一挡板 24上的第 一毛细体 25、 一位于第一毛细体 25上方的第一气体通道 26及一位于第一 气体通道 26上的第一热量传递层 27; 所述第二蒸发部 4包括一靠近第一 液体管路 66的第二补偿腔 42、 一位于所述第二补偿腔 42前的第二液体腔 43、 一设于第二液体腔 43前的第二挡板 44、 一安装于第二挡板 44上的第 二毛细体 45、 一位于第二毛细体 45上方的第二气体通道 46及一位于第二 气体通道 46上的第二热量传递层 47。
在第一蒸发部 2内, 所述散热液体按图 4中的箭头方向流动, 在第二 蒸发部 4内, 所述散热液体按图 5中的箭头方向流动。
具体地, 所述散热液.体从第二液体管路 86 流入与该第二液体管路 86 相连的第一蒸发部 2的第一朴偿腔 22后, 依次通过该第一蒸发部 2的第 一液体腔 23及第一毛细体 25并吸收第一热量传递层 27传递的热量转化 成气体, 被蒸发成气体的散热液体再通过该第一蒸发部 2 的第一气体通道 26流入与该第一蒸发部 2相连的第一气体管路 62 内, 然后经过与该第一 气体管路 62相连的第一冷凝管路 64冷凝成液体, 进.入第一液体管路 66, 然后进入第二蒸发部 4如此可实现散热液体的反复循环利用, 保证了较 的散热效果, 且本结构中一份散热液体可供两个蒸发部循环使用, 减少了 所需散热液体的份数, 降低了生产成本, 同时由于构成散热回路管的所有 元件一体成型制成, 组装时操作更简便。
请参阅图 6及图 7, 并结合参阔图 3至图 5, 本发明提供一种用散热 回路管的背光模组, 包括: 背板 20。 设于背板 20内的导光板 40、 设于背 板 20 内的两个背光源 60、 设于背板 20 与背光源 60之间的散热回路管 200及设于背板 20与导光板 40之间的反射片 80。 每一背光源 60包括一 印刷电路板 602及安装并电性连接于印刷电路板 602 上的数个 LED 灯 604。
所述散热回路管 200包括: 一第一蒸发部 2、 与第一蒸发部 2相对设 置的第二蒸发部 4、 与所述第一蒸发部 2及第二蒸发部 4相连的第一管路 6、 与所述第一蒸发部 2及第二蒸发部 4相连并与第一管路 6相对设置的 第二管路 8及设于所述第一管路 6与第二管路 8内的散热液体, 所述第一
蒸发部 2 , 第一管路 6 , 第二蒸发部 4与第二管路 8依次首尾连接, 形成 一密闭回路, 所述第一管路 6包括连接第一蒸发部 2的第一气体管路 62、 连.接第一气体管路 62的第一冷凝管路 64及连接第一冷凝管路 64与第二 蒸发部 4的第一液体管路 66, 所述第二管路 8包括连接第二蒸发部 4的第 二气体管路 82、 连接第二气体管路 82的第二冷凝管路 84及连接第二冷凝 管路 84与第一蒸发部 2的第二液体管路 86, 所述两背光源 60分别设于所 述第一蒸发部 2 与第二蒸发部 4 上。 优选的, 所述第一冷凝管路 64 呈 形结构, 所述第二冷凝管路 84 同样呈 "U" 形结构, 在结构上该第 一管路 6与第二管路 8呈对称结构设置, 但其相对称的部位的功能却不尽 相同, 在本实施例中, 所述第一冷凝管路 64与第二冷凝管路 84相对内凹 设置, 以降低整条第一管路 6与第二管路 8的长度, 降低整个散热回路管 的占用面积。
所述第一管路 6与第二管路 8由铜、 钛至少一种制成。 本实施例中, 所述第一管路 6与第二管路 8由铜、 钛合金制成。
所述散热液体在散热回路管制作时注入管内, 且制作时, 向散热回路 管内注入散热液体的环境为真空环境, 以避免空气中的气体进入散热回路 管内占用管内的空间。
所述散热液体由水、 氟利昂制冷剂、 氨及甲醇等组成, 该散热液体在 散热回路管内按图 3中的箭头方向流动。
具体地, 请参阔图 4及图 5 , 所述第一蒸发部 2 包括一靠近第二液体 管路 86 的第一补偿腔 22、 一位于所述第一补偿腔 22 前的第一液体腔 23、 一设于第一液体腔 23前的第一挡板 24、 一安装于第一挡板 24上的第 一毛细体 25、 一位于第一毛细体 25上方的第一气体通道 26及一位于第一 气体通道 26上的第一热量传递层 27; 所述第二蒸发部 4包括一靠近第一 液体管路 66的第二补偿腔 42、 一位于所述第二补偿腔 42前的第二液体腔 43、 一设.于第二液体腔 43前的第二挡板 44、 一安装于第二挡板 44上的第 二毛细体 45、 一位于第二毛细体 45上方的第二气体通 _道 46及一位于第二 气体通道 46上的第二热量传递层 47。
在第一蒸发部 2内, 所述散热液体按图 4中的箭头方向流动, 在第二 蒸发部 4内 , 所述散热液体按图 5中的箭头方向流动„
具体地, 所述散热液体从第二液体管路 86 流入与该第二液体管路 86 相连的第一蒸发部 2的第一 偿腔 22后, 依次通过该第一蒸发部 2的第 一液体腔 23及第一毛细体 25并吸收第一热量传递层 27传递的热量转化 成气体, 被蒸发成气体的散热液体再通过该第一蒸发部 2 的第一气体通道
26流入与该第一蒸发部 2相连的第一气体管路 62 内, 然后经过与该第一 气体管路 62相连的第一冷凝管路 64冷凝成液体, 进入第一液体管路 66, 然后进入第二蒸发部 4如此可实现散热液体的反复循环利用, 保证了较好 的散热效果, 且本结构中一份散热液体可供两个蒸发部循环使用, 减少了 所需散热液体的份数, 降低了生产成本, 同时由于构成散热回路管的所有 元件一体成型制成, 组装时搡作更简便。
所述两个背光源 60 的两印刷电路板. 602 分别直接 ^靠于所述第一热 量传递层 27与第二热量传递层 47上„
本结构的散热回路管只需一份散热液体可实现两组背光源 60 的散 热, 减少了所需散热液体的份数, 降低了生产成本, 且由于构成散热回路 管的所有元件一体成型制成, 组装时操作更简便。
所述背板 20包括底板 202及垂直连接于底板 202的数个侧板 204, 所 述.底板 202包括第一底板 222及两与第一底板 222呈台阶型设置的第二底 板 224, 所述印刷电路板 602及散热回路管 200的第一蒸发部 2与第二蒸 发部 4设于第二底板 224上且所述印刷电路板 602的上表面与所述第 底 板 222 的上表面平齐。 进一步地, 所述背板的底板 202 相对散热回路管 200的第一与第二管路 2、 4还设有管路凹槽(未图示) , 进而将所述散热 回路管 200安装于背板 20内。
综上所述, 本发明的散热回路管及用该散热回路管的背光模组, 构成 该散热回路管的所有元件一体成型制成, 进而使用该散热回路管的背光模 组的组装操作简便, 且只需在其内注入一份散热液体即可实现两组背光源 上的多个 LED 灯散热, 保证了较好的散热效果, 降低了散热回路管及背 光模组的生产成本。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形, 而所有这些改变和变形 都应属于本发明权利要求的保护范围。
Claims
2 , 如权利要求 1 所述的散热回路管, 其中, 所述第一蒸发部包括一 靠近第二液体管路的第一补偿腔、 一位于所述第一补偿腔前的第一液体 腔、 一设于第一液体腔前的第一挡板、 一安装于第一挡板上的第一毛细 体、 一位于第一毛细体上方的第一气体通道及一位于第―气体通道上的第 一热量传递层; 所述第二蒸发部包括一靠近第一液体管路的第二补偿腔、 一位于所述第二补偿腔前的第二液体腔、 一设于第二液体腔前的第二挡 板、 一安装于第二挡板上的第二毛细体、 一位于第二毛细体上方的第二气 体通道及一位于第二气体通道上的第二热量传递层。
3、 如权利要求 1 所述的散热回路管, 其中, 所述散热液体由水、 氟 利昂制冷剂、 氨及甲醇组成。
4 , 如权利要求 i 所述的散热回路管, 其中, 所述第一管路与第二管 路由铜、 钛至少一种制成„
6、 如权利要求 5 所述的用散热回路管的背光模组, 其中, 所述第一 蒸发部包括一靠近第二液体管路的第一补偿腔、 一位于所述第一补偿腔前 的第一液体腔、 一设于第一液体腔前的第一挡板、 一安装于第一挡板上的 第一毛细体、 一位于第一毛细体上方的第一气体通道及一位于第一气体通 道上的第一热量传递层; 所述第二蒸发部包括一靠近第一液体管路的第二 补偿腔、 一位于所述第二补偿腔前的第二液体腔、 一设于第二液体腔前的 第二挡板、 一安装于第二挡板上的第二毛细体、 一位于第二毛细体上方的 第二气体通道 —位于第二气体通道上的第二热量传递层。
7、 如权利要求 6 所述的用散热回路管的背光模组, 其中, 每一背光 源包括一印刷电路板及安装并电性连接于印刷电路板上的数个 LED 灯, 所述两背光源的两印刷电路板分别直接抵靠于所述第一热量传递层与第二 热量传递层上。
8、 如权利要求 5 所述的用散热回路管的背光模组, 其中, 所述散热 液体由水、 氟利昂制冷剂、 氨及曱醇组成。
9 , 如权利要求 5 所述的用散热回路管的背光模组, 其中, 所述第一 管路与第二管路由铜、 钛至少一种制成。
10, 如权利要求 7所述的用散热回路管的背光模组, 其中, 所述背板 包括底板及垂直连接于底板的数个侧板, 所述底板包括第一底板及两与第 一底板呈台阶型设置的第二底板, 所述印刷电路板及散热回路管的第一蒸 发部与第二蒸发部设于第二底板上且所述印刷电路板的上表面与所述第一 底板的上表面平齐。
11 , 一种用散热回路管的背光模组, 包括: 背板、 设于背板内的导光 板、 设于背板内的两个背光源、 设于背板与背光源之间的散热回路管及设 于背板与导光板之间的反射片, 所述散热回路管包括: 一第一蒸发部、 与 第一蒸发部相对设置的第二蒸发部、 与所述第一蒸发部及第二蒸发部相连 的第一管路、 与所述第一蒸发部及第二蒸发部相连并与第一管路相对设置 的第二管路及设于所述第一管路与第二管路内的散热液体, 所述第一蒸发 部, 第一管路、 第二蒸发部与第二管路依次首尾连接, 形成一密闭回路; 所述第一管路包括连接第一蒸发部的第一气体管路、 连接第一气体管路的 第一冷凝管路及连接第一冷凝管路与第二蒸发部的第一液体管路; 所述第 二管路包括连接第二蒸发部的第二气体管路、 连接第二气体管路的第二冷 凝管路及连接第二冷凝管路与第一蒸发部的第二液体管路, 所述两背光源
分别设于所述第一蒸发部与第二蒸发部上;
其中, 所述第一蒸发部包括一靠近第二液体管路的第一补偿腔, 一位 于所述第一补偿腔前的第一液体腔、 一设于第一液体腔前的第一挡板。 一 安装于第一挡板上的第一毛细体、 一位于第一毛细体上方的第一气体通道 及一位于第一气体通道上的第一热量传递层; 所述第二蒸发部包括一靠近 第一液体管路的第二补偿腔 一位于所述第二补偿腔前的第二液体腔、 一 设于第二液体腔前的第二挡板、 一安装于第二挡板上的第二毛细体, 一位 于第二毛细体上方的第二气体通道及一位于第二气体通道上的第二热量传 递层。
12、 如权利要求 11 所述的用散热回路管的背光模组, 其中, 每一背 光源包括一印刷电路板及安装并电性连接于印刷电路板上的数个 LED 灯, 所述两背光源的两印刷电路板分别直接抵靠于所述第一热量传递层与 第二热量传递层上。
13、 如权利要求 11 所述的用散热回路管的背光模组, 其中, 所述.散 热液体由水、 氟利昂制冷剂。 氨及甲醇组成。
】4、 如权利要求 11 所述的用散热回路管的背光模组, 其中, 所述第 一管路与第二管路由铜 钛至少一种制成。
15、 如权利要求 12 所述的用散热回路管的背光模组, 其中, 所述背 板包括底板及垂直连接于底板的数个侧板, 所述底板包括第一底板及两与 第一底板呈台阶型设置的第二底板, 所述印刷电路板及散热回路管的第一 蒸发部与第二蒸发部设于第二底板上且所述印刷电路板的上表面与所述第 一底板的上 .表面平齐。
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