WO2016169182A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2016169182A1
WO2016169182A1 PCT/CN2015/088974 CN2015088974W WO2016169182A1 WO 2016169182 A1 WO2016169182 A1 WO 2016169182A1 CN 2015088974 W CN2015088974 W CN 2015088974W WO 2016169182 A1 WO2016169182 A1 WO 2016169182A1
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WO
WIPO (PCT)
Prior art keywords
heat dissipation
display device
dissipation plate
circuit board
liquid crystal
Prior art date
Application number
PCT/CN2015/088974
Other languages
English (en)
French (fr)
Inventor
马永达
张玉欣
吴新银
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/022,623 priority Critical patent/US10613271B2/en
Publication of WO2016169182A1 publication Critical patent/WO2016169182A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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

  • the present invention belongs to the field of display technologies, and in particular, to a display device.
  • a backlight module is generally used in a liquid crystal display device (LCD) to provide a uniform light source for the liquid crystal display to realize image display.
  • the backlight module is divided into a side-in backlight module and a direct-lit backlight module, wherein the light source in the side-in backlight module is located on the side of the display panel, and the direct-lit backlight module The light source in the group is at the bottom of the display panel.
  • the light source in the existing backlight module usually uses an LED (Light Emitting Diode) as a light source, and the LED is a low-calorie illuminator, but a large number of LEDs will generate a lot of heat when illuminated for a long time; meanwhile, for convenient power connection
  • the display panel provides a power supply and a signal source driven circuit board (PCB) connected to the liquid crystal screen and is disposed on the back panel. During the operation of the display device, the circuit board also generates a certain amount of heat. .
  • a heat dissipation hole is generally formed in the outer casing of the display device, and the light source and the circuit board are disposed in a heat dissipation chamber formed between the back plate and the outer casing.
  • the heat generated by the light source and the heat generated by the circuit board are simultaneously collected and conducted through the same heat dissipation plate, and the back plate under the light bar is directly Undertake the circuit board. Since the heat dissipation plate does not distinguish between the heat dissipation of the light bar and the circuit board, and generally the heat emitted by the light bar is greater than the heat emitted by the circuit board, the heat directly transmitted to the back plate may cause a large circuit board located on the back plate.
  • the heat dissipation pressure accelerates the aging of the circuit board and the electronic components thereon, reducing the service life of the display device.
  • the technical problem to be solved by the present invention is to provide a display device according to the above-mentioned deficiencies in the prior art, wherein by providing an arch structure on the heat dissipation plate, the heat dissipation plate can be reduced to be transmitted to the back in a region corresponding to the circuit board.
  • the heat of the board reduces the temperature of the area where the board is located, thereby preventing the aging of electronic components and prolonging the life of the board.
  • a display device includes a backlight module and a display panel
  • the backlight module includes a light guide plate, a heat dissipation plate, and a light source
  • the heat dissipation plate includes a heat dissipation plate body and a heat dissipation plate side body.
  • the heat sink body is perpendicular to the heat sink body and is connected to the heat sink body on at least one side of the heat sink body;
  • the display panel includes a liquid crystal screen and a circuit board connected to the liquid crystal panel.
  • the liquid crystal panel and the circuit board are disposed parallel to the direction in which the heat dissipation plate body is disposed and are respectively disposed on two sides of the heat dissipation plate; at least a portion of the heat dissipation plate body corresponding to the area of the circuit board
  • the distance between the liquid crystal panels is smaller than the distance between other regions of the heat dissipation plate body and the liquid crystal panel.
  • an arch structure facing the liquid crystal panel is formed with respect to a plane where the circuit board is located.
  • the display device further includes a backing plate disposed on a side of the backing plate away from the heat dissipation plate and corresponding to an arched structure of the heat dissipation plate.
  • the arch structure may be a single arch structure; or the arch structure may also be a multi-arch structure including at least two connected holes.
  • the arch structure is a multi-arch structure including at least two connected holes
  • the bottom of the connection portion of the adjacent holes of the multi-arch structure is in contact with the back plate.
  • the light guide plate is disposed between the heat dissipation plate and the liquid crystal panel, and a setting direction of a dome of the arch structure is parallel to a direction in which the light guide plate is disposed, and a dome of the arch structure
  • a contact member having a spaced-apart, concave-convex configuration is provided, and the dome of the arch structure is in contact with the bottom of the light guide plate through the contact member.
  • the backlight module further includes a bottom reflection sheet, the bottom reflection sheet is disposed in parallel with the light guide plate and located between the light guide plate and the heat dissipation plate, and the setting area of the bottom reflection sheet at least corresponds to In a central area of the light guide plate.
  • a direction in which the dome of the arch structure is disposed is parallel to a direction in which the bottom reflection sheet is disposed, and a dome of the arch structure is provided with a groove structure or a convex structure which is spaced apart, and the arch The dome of the shaped structure is in contact with the bottom of the bottom reflector.
  • the light source is disposed on the side plate of the heat dissipation plate and located at the light guide At least one side of the board.
  • heat dissipation plate main body and the back plate are connected by screwing or directly riveting.
  • the beneficial effects of the present invention are: in the display device, by forming an arch structure in a region of the heat dissipation plate of the backlight module corresponding to the circuit board, the heat generated by the light source such as the light bar is partially transmitted to the inner side of the display device near the display device space.
  • a better heat dissipation effect can be obtained;
  • the area corresponding to the circuit board of the backplane is not in contact with the heat dissipation plate, thereby solving the circuit of the light entrance side and the display panel of the side-entry backlight module.
  • the problem that the data line on the lead-out side of the board is concentrated is the same, the heat dissipation pressure of the board area is alleviated, and the service life of the display device is improved.
  • FIG. 1 is a schematic structural view of a display device according to Embodiment 1 of the present invention.
  • Figure 2 is a partially enlarged schematic view showing the display device of Figure 1;
  • Figure 3 is a schematic structural view of the convex structure or the groove structure of Figure 2;
  • Figure 4 is a schematic view showing another structure of the convex structure or the groove structure of Figure 2;
  • FIG. 5 is a schematic structural diagram of a display device according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a display device according to Embodiment 3 of the present invention.
  • Figure 7 is a partially enlarged schematic structural view of the display device of Figure 6;
  • 11-heat sink 111-heat sink body, 112-heat sink side body, 113-arch structure, 115-raised structure, 116-groove structure, 12-light bar, 13-light guide, 14-bottom reflection Sheet, 15-optical film,
  • the embodiment provides a display device, which preferably solves the problem that the heat dissipation set is when the data line lead-out side of the circuit board of the display panel and the light source of the side-entry backlight module are on the same side.
  • the problem in the display device improves the service life of the display device.
  • the display device includes a backlight module and a display panel.
  • the backlight module includes a light guide plate 13 , a heat dissipation plate 11 , and a light source (such as the light bar 12 in FIG. 1 ).
  • the heat dissipation plate 11 includes a heat dissipation plate body. 111 and a heat sink side body 112, the heat sink side body 112 is perpendicular to the heat sink body 111 and is connected to the heat sink body 111 on at least one side of the heat sink body 111; the display panel includes a liquid crystal panel 21 and a circuit connected to the liquid crystal panel 21.
  • the board 22 (the board 22 may be, for example, a PCB or an FPC), the liquid crystal screen 21 and the circuit board 22 are disposed in parallel with the direction in which the heat sink body 111 is disposed and are respectively disposed on both sides of the heat sink 11; the heat sink main body 111 corresponds to the circuit
  • the distance between at least a portion of the area of the board 22 and the liquid crystal panel 21 is smaller than the distance between the other areas of the heat sink main body 111 and the liquid crystal panel 21.
  • the heat dissipation plate 11 in the present embodiment may be an L-shaped structure in which an opening is formed toward one side of the liquid crystal panel 21 (a heat dissipation plate side body 112 is formed on one side of the heat dissipation plate main body 111) or a concave structure (in the heat dissipation plate main body)
  • the opposite side faces of the 111 form the heat sink side body 112), and the L-shaped structure or the concave structure is further provided with an arching toward the liquid crystal panel 21 on the side opposite to the opening.
  • an arch structure 113 facing the liquid crystal panel 21 is formed in a region of the heat sink main body 111 corresponding to the circuit board 22 with respect to a plane in which the circuit board 22 is located.
  • the arch structure 113 is a single arch structure.
  • the light guide plate 13 is disposed between the heat dissipation plate 11 and the liquid crystal panel 21, and the light source is disposed on the heat dissipation plate side body 112 and located on at least one side of the light guide plate 13.
  • a heat dissipation plate 11 having a concave structure with two heat dissipation plate side bodies 112 may be used, and two light sources may be respectively disposed on the heat dissipation plate side bodies 112 on both sides of the concave structure; or, two L-types may be used.
  • the heat dissipation plate 11 of the structure has only one heat dissipation plate side body 112 for each of the L-shaped structure heat dissipation plates 11, and one light source is disposed on each of the heat dissipation plate side bodies 112 of each of the heat dissipation plates 11.
  • the arrangement direction of the dome of the arch structure 113 is parallel to the direction in which the light guide plate 13 is disposed, and the dome of the arch structure 113 is provided with spaced apart, concave-convex contact members, and the arch structure 113 The dome is in contact with the bottom of the light guide plate 13 through the contact member.
  • the contact member comprises a convex structure and a groove structure.
  • 2 is a partial enlarged view of FIG. 1.
  • a spacer structure 115 and a groove structure 116 are provided in the dome region.
  • the raised structure 115 and the groove structure 116 may, for example, be parallel to the sides of the light strip, respectively.
  • the raised structure 115 and the recess structure 116 are also They can be spaced apart and perpendicular to the sides of the light bar.
  • the contact member in the dome region can also be provided with a raised structure 115 only on its upper surface as shown in FIG.
  • the backlight module of the embodiment may further include an optical film 15 , which enables the backlight module to obtain a more uniform backlight with suitable brightness.
  • the display device further includes a back plate 31.
  • the heat dissipation plate body 111 and the back plate 31 are connected by screwing or directly riveting; and the circuit board 22 is disposed on a side of the back plate 31 away from the heat dissipation plate 11 , and the back plate 31 is provided with the circuit board 22 .
  • the area is separated from the heat sink 11. The heat generated by the light bar 12 is conducted to the back plate 31 through the heat dissipation plate 11.
  • the display device further includes a module frame 32.
  • the backlight module can be single-sided or double-side light according to the brightness requirement of the liquid crystal panel 21.
  • the LED light bar 12 may be assembled on one heat sink side body of one heat sink 11, or the LED light bar 12 may be assembled on the opposite two heat sink side bodies of one heat sink 11, or respectively on two heat sinks
  • the LED light bar 12 is assembled on the side body of the eleven, which is not limited herein.
  • the display device of the embodiment by providing an arch structure on the heat dissipation plate, a better heat dissipation effect can be obtained, and heat transferred to the back plate in the region corresponding to the circuit board can be reduced, and the circuit board can be reduced.
  • the temperature in the area to prevent aging of electronic components and extend the life of the board.
  • the embodiment provides a display device.
  • the difference between the embodiment and the embodiment 1 is that the arch structure in the heat sink body is different.
  • the area of the heat sink main body 111 corresponding to the circuit board 22 is formed with respect to the plane of the circuit board 22 toward the liquid crystal panel 21 including at least two connected holes.
  • a multi-arched structure 113 For example, as shown in FIG. 5, the arch structure 113 of the heat dissipation plate 11 in this embodiment may have a double arch structure.
  • the arch structure 113 can also be a multi-arch structure, which can be flexibly designed according to the size of the circuit board area or the heat dissipation requirement, which is not limited herein.
  • the arch structure 113 is a multi-arch structure of at least two connected holes, the bottom of the connection portion of the adjacent holes of the arch structure 113 is in contact with the back plate 31 for better support effect.
  • the other structures in the display panel and the backlight module are the same as those of the display device in Embodiment 1, and will not be described in detail herein.
  • the dome of the arch structure 113 may be provided with spaced apart, concave-convex contact members, and the dome of the arch structure 113 passes through the contact member and the light guide plate. The bottom of the 13 is in contact and will not be detailed here.
  • the display device of the embodiment by providing an arch structure on the heat dissipation plate, a better heat dissipation effect can be obtained, and heat transferred to the back plate in the region corresponding to the circuit board can be reduced, and the circuit board can be reduced.
  • the temperature in the area to prevent aging of electronic components and extend the life of the board.
  • the embodiment provides a display device.
  • the backlight module in the embodiment further includes a bottom reflection sheet.
  • the light source can be better utilized and the light utilization efficiency can be improved.
  • the backlight module further includes a bottom reflective sheet 14 disposed in parallel with the light guide plate 13 and located between the light guide plate 13 and the heat dissipation plate 11 .
  • the arrangement area of the bottom reflection sheet 14 corresponds at least to the central area of the light guide plate 13. That is, the bottom reflection sheet 14 is installed between the light guide plate 13 and the heat dissipation plate 11, and its area may be equal to or slightly smaller than the area of the light guide plate 13 (as shown in FIG. 6).
  • the arrangement direction of the dome of the arch structure 113 is parallel to the direction in which the bottom reflection sheet 14 is disposed, and the dome of the arch structure 113 is provided with a groove structure or a convex structure which is spaced apart, and an arch structure The dome of 113 is in contact with the bottom of the bottom reflection sheet 14.
  • Fig. 6 is a view showing a heat dissipation plate of a single arch structure in the first embodiment
  • Fig. 7 is a partial enlarged view of Fig. 6.
  • the area of the heat dissipation plate 11 corresponding to the circuit board 22 is arched toward the liquid crystal panel 21; at the same time, the contact area between the top of the arch structure and the bottom of the bottom reflection sheet 14 is further provided with a convex structure 115, thereby reducing the heat dissipation plate 11 and the bottom reflection sheet.
  • the conduction of heat to the bottom reflection sheet 14 further reduces the heat conducted by the heat dissipation plate 11 to the light guide plate 13, and reduces the risk of deformation of the light guide plate 13 on the light entrance side (i.e., near the light bar side) due to heat.
  • the other structures in the display panel and the backlight module are the same as those of the display device in Embodiment 1 or Embodiment 2, and will not be described in detail herein.
  • the heat generated by the light source such as the light bar is partially transmitted to the back plate near the display device.
  • the inside space On the one hand, a better heat dissipation effect can be obtained; on the other hand, the heat transferred from the heat dissipation plate to the backplane in the area corresponding to the circuit board is reduced, and the light incident side and the display panel of the side-entry backlight module are solved.
  • the problem that the data line on the lead-out side of the circuit board is concentrated at the same time is concentrated, the heat dissipation pressure of the circuit board area is alleviated, and the service life of the display device is improved.

Abstract

一种显示装置，该显示装置包括背光模组和显示面板，背光模组包括导光板（13）、散热板（11）和光源（12），散热板（11）包括散热板主体（111）以及散热板侧体（112），散热板侧体（112）垂直于散热板主体（111）并且在散热板主体（111）的至少一侧与散热板主体（111）相连；显示面板包括液晶屏（21）以及与液晶屏（21）相连的电路板（22），液晶屏（21）和电路板（22）平行于散热板主体（111）的设置方向设置且分别设置于散热板（11）的两侧；散热板主体（111）的对应于电路板（22）的区域的至少一部分与液晶屏（21）之间的距离小于散热板主体（111）的其他区域与液晶屏（21）之间的距离。通过该显示装置，可以减少散热板（11）在对应于电路板（22）的区域传导给背板（31）的热量，降低电路板（22）所在区域的温度，从而防止电子元器件的老化，延长电路板（22）的寿命。

Description

显示装置 技术领域
本发明属于显示技术领域，具体涉及一种显示装置。
背景技术
由于液晶本身不发光，因此在液晶显示装置(Liquid Crystal Display，简称LCD)中通常采用背光模组(Back Light Module，简称BLM)为液晶屏提供均匀的光源，以实现图像显示。根据背光模组中光源设置位置的不同，背光模组分为侧入式背光模组和直下式背光模组，其中，侧入式背光模组中的光源位于显示面板的侧面，直下式背光模组中的光源位于显示面板的底部。
现有的背光模组中的光源通常采用LED(Light Emitting Diode，发光二极管)作为光源，LED为低热量发光体，但大量LED长时间点亮也将产生不少热量；同时，为便于电源连接，显示面板中为液晶屏提供电源和信号源驱动的电路板(Printed Circuit Board，简称PCB)与液晶屏连接且设置于背板上，在显示装置工作过程中，电路板也会产生一定的热量。为了保证显示装置的正常工作，通常在显示装置背面的外壳开设散热孔，并将光源和电路板设置在背板与外壳之间形成的散热腔室中。
为实现显示装置结构的薄型化，在现有的侧入式背光模组中，光源产生的热量和电路板产生的热量通过同一块散热板同时采集并进行传导，且灯条下方的背板直接承接电路板。由于散热板对于灯条和电路板的散发热量未做区分，且通常情况下灯条散发的热量大于电路板散发的热量，直接传导到背板的热量会导致位于背板的电路板存在较大的散热压力，加速电路板及其上的电子元器件的老化，降低显示装置的使用寿命。
可见，设计一种能在保证结构紧凑的基础上，增加散热效果并防止电路板及其上的电子元器件的老化的背光模组成为目前亟待解决的技术问题。
发明内容
本发明所要解决的技术问题是针对现有技术中存在的上述不足，提供一种显示装置，其中，通过在散热板上设置拱形结构，可以减少散热板在对应于电路板的区域传导给背板的热量，降低电路板所在区域的温度，从而防止电子元器件的老化，延长电路板的寿命。
根据本发明的一个方面，提供了一种显示装置，包括背光模组和显示面板，所述背光模组包括导光板、散热板和光源，所述散热板包括散热板主体以及散热板侧体，所述散热板侧体垂直于所述散热板主体并且在所述散热板主体的至少一侧与所述散热板主体相连；所述显示面板包括液晶屏以及与所述液晶屏相连的电路板，所述液晶屏和所述电路板平行于所述散热板主体的设置方向设置且分别设置于所述散热板的两侧；所述散热板主体的对应于所述电路板的区域的至少一部分与所述液晶屏之间的距离小于所述散热板主体的其他区域与所述液晶屏之间的距离。
进一步地，在所述散热板主体的对应于所述电路板的区域，相对于所述电路板所在的平面形成朝向所述液晶屏的拱形结构。
进一步地，所述显示装置还包括背板，所述电路板设置于所述背板远离所述散热板的一侧、且与所述散热板的拱形结构相对应。
进一步地，所述拱形结构可以为单拱形结构；或者，所述拱形结构也可以为包括至少两个相连孔的多拱形结构。
进一步地，在所述拱形结构为包括至少两个相连孔的多拱形结构时，所述多拱形结构的相邻孔的连接部的底部与所述背板接触。
进一步地，所述导光板设置于所述散热板与所述液晶屏之间，所述拱形结构的拱顶的设置方向与所述导光板的设置方向平行，所述拱形结构的拱顶设置有间隔分布的、凹凸配置的接触部件，且所述拱形结构的拱顶通过所述接触部件与所述导光板的底部相接触。
进一步地，所述背光模组还包括底反射片，所述底反射片与所述导光板平行设置且位于所述导光板与所述散热板之间，所述底反射片的设置区域至少对应于所述导光板的中心区域。
进一步地，所述拱形结构的拱顶的设置方向与所述底反射片的设置方向平行，所述拱形结构的拱顶设置有间隔分布的凹槽结构或凸起结构、且所述拱形结构的拱顶与所述底反射片的底部相接触。
进一步地，所述光源设置于所述散热板侧体上，且位于所述导光 板的至少一侧。
进一步地，所述散热板主体与所述背板通过螺丝连接或直接铆合连接。
本发明的有益效果是：在显示装置中，通过在背光模组的散热板对应于电路板的区域形成拱形结构，将例如灯条的光源产生的热量部分传导到背板靠近显示装置的内侧空间。一方面，能获得更好的散热效果；另一方面，使得背板的与电路板对应的区域不与散热板接触，从而解决了在侧入式背光模组的入光侧与显示面板的电路板的数据线引出侧相同时热量较集中的问题，缓解了电路板区域的散热压力，提高了显示装置的使用寿命。
附图说明
图1为本发明实施例1中显示装置的结构示意图；
图2为图1中显示装置的局部放大结构示意图；
图3为图2中凸起结构或凹槽结构的一种结构示意图；
图4为图2中凸起结构或凹槽结构的另一种结构示意图；
图5为本发明实施例2中显示装置的结构示意图；
图6为本发明实施例3中显示装置的结构示意图；
图7为图6中显示装置的局部放大结构示意图；
图中：
11-散热板，111-散热板主体，112-散热板侧体，113-拱形结构，115-凸起结构，116-凹槽结构，12-灯条，13-导光板，14-底反射片，15-光学膜材，
21-液晶屏，22-电路板，
31-背板，32-模组框架。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明显示装置作进一步详细描述。
实施例1：
本实施例提供一种显示装置，该显示装置较好解决了当显示面板的电路板的数据线引出侧与侧入式背光模组的光源在同一侧时散热集 中的问题，提高了显示装置的使用寿命。
如图1所示，该显示装置包括背光模组和显示面板，其中，背光模组包括导光板13、散热板11和光源(例如图1中的灯条12)，散热板11包括散热板主体111以及散热板侧体112，散热板侧体112垂直于散热板主体111并且在散热板主体111的至少一侧与散热板主体111相连；显示面板包括液晶屏21以及与液晶屏21相连的电路板22(电路板22例如可以为PCB或FPC)，液晶屏21和电路板22平行于散热板主体111的设置方向设置且分别设置于散热板11的两侧；散热板主体111的对应于电路板22的区域的至少一部分与液晶屏21之间的距离小于散热板主体111的其他区域与液晶屏21之间的距离。
例如，本实施例中的散热板11可以为朝向液晶屏21的一侧形成开口的L型结构(在散热板主体111的一侧形成散热板侧体112)或者内凹结构(在散热板主体111的相对两侧均形成散热板侧体112)，并且，该L型结构或内凹结构在与所述开口相对的一侧还设置有朝向液晶屏21的拱起。
在图1中，在散热板主体111的对应于电路板22的区域相对于电路板22所在的平面形成朝向液晶屏21的拱形结构113。在本实施例中，该拱形结构113为单拱形结构。
导光板13设置于散热板11与液晶屏21之间，光源设置于散热板侧体112上且位于导光板13的至少一侧。例如，可以采用具有两个散热板侧体112的呈内凹结构的散热板11，将两个光源分别设置在内凹结构两侧的散热板侧体112上；或者，可以采用两个L型结构的散热板11，每个L型结构的散热板11仅具有一个散热板侧体112，在每个散热板11的散热板侧体112上各设置一个光源。
进一步地，本实施例中拱形结构113的拱顶的设置方向与导光板13的设置方向平行，拱形结构113的拱顶设置有间隔分布的、凹凸配置的接触部件，且拱形结构113的拱顶通过接触部件与导光板13的底部相接触。
其中，接触部件包括凸起结构和凹槽结构。图2为图1的局部放大图，从图2中可以很明显地看出，拱顶区域中设置有间隔分布的凸起结构115和凹槽结构116。凸起结构115和凹槽结构116例如可以分别平行于灯条的侧面。如图3所示，凸起结构115和凹槽结构116也 可以间隔设置且分别垂直于灯条的侧面。当然，容易理解的是，拱顶区域中的接触部件也可以如图4所示，仅在其上表面设置凸起结构115。这里，通过在散热板11的对应于电路板22的区域设置朝向液晶屏21的拱形结构113，并在拱形结构113的顶面与导光板13的底部接触的区域设置接触部件以减少散热板11与导光板13的接触面积，减少了散热板11对导光板13传导热量的影响。
另外，从图1可见，本实施例的背光模组还可以包括光学膜材15，光学膜材15能使得背光模组获得更均匀的、亮度合适的背光。
在图1中，显示装置还包括背板31。可选的是，散热板主体111与背板31通过螺丝连接或直接铆合连接；而电路板22设置于背板31远离散热板11的一侧，且背板31的设置有电路板22的区域与散热板11相分离。灯条12产生的热量通过散热板11传导到背板31上。一方面，由于散热板11的实际有效散热体积增大，因此能获得更好的散热效果；另一方面，通常情况下，由于空气的导热系数远小于金属的导热系数，因此，能有效保证电路板22所在区域不受大量热量的影响，从而防止电子元器件的老化，确保电路板的寿命。
当然，为了能固定液晶屏21和保持液晶屏21与背光模组恰当的距离，显示装置还包括模组框架32。
容易理解的是，在本实施例的显示装置中，根据液晶屏21的亮度需求，背光模组可以为单侧入光或双侧入光。例如，可以在一个散热板11的一个散热板侧体上组装LED灯条12，或者在一个散热板11的相对的两个散热板侧体上组装LED灯条12，或者分别在两个散热板11的侧体上组装LED灯条12，这里不做限定。
在本实施例的显示装置中，通过在散热板上设置拱形结构，既可以获得更好的散热效果，又可以减少散热板在对应于电路板的区域传导给背板的热量，降低电路板所在区域的温度，从而防止电子元器件的老化，延长电路板的寿命。
实施例2：
本实施例提供一种显示装置，本实施例与实施例1的区别在于，散热板主体中的拱形结构不同。
在本实施例中，在散热板主体111的对应于电路板22的区域相对于电路板22所在的平面形成朝向液晶屏21的包括至少两个相连孔的 多拱形结构113。例如，如图5所示，本实施例中散热板11的拱形结构113可以为双拱形结构。当然，拱形结构113也可以为多拱形结构，这可以根据电路板区域的大小或散热要求进行灵活设计，这里不做限定。
进一步地，在拱形结构113为至少两个相连孔的多拱形结构时，拱形结构113的相邻孔的连接部的底部与背板31接触，以便起到更好的支撑效果。
在本实施例的显示装置中，显示面板和背光模组中的其他结构与实施例1中的显示装置的对应结构相同，这里不再详述。同样的，为了减少散热板11对导光板13的影响，在拱形结构113的拱顶可以设置有间隔分布的、凹凸配置的接触部件，且拱形结构113的拱顶通过接触部件与导光板13的底部相接触，这里也不再详述。
在本实施例的显示装置中，通过在散热板上设置拱形结构，既可以获得更好的散热效果，又可以减少散热板在对应于电路板的区域传导给背板的热量，降低电路板所在区域的温度，从而防止电子元器件的老化，延长电路板的寿命。
实施例3：
本实施例提供一种显示装置，本实施例与实施例1或实施例2的区别在于，本实施例中的背光模组还包括底反射片。通过设置底反射片，可以更好的利用光源，提高光利用率。
如图6所示，背光模组还包括底反射片14，底反射片14与导光板13平行设置且位于导光板13与散热板11之间。底反射片14的设置区域至少对应于导光板13的中心区域。即，底反射片14安装在导光板13与散热板11之间，其面积可以与导光板13的面积相等或稍小于导光板13的面积(如图6所示)。
在本实施例中，拱形结构113的拱顶的设置方向与底反射片14的设置方向平行，拱形结构113的拱顶设置有间隔分布的凹槽结构或凸起结构、且拱形结构113的拱顶与所述底反射片14的底部相接触。
图6以实施例1中的单拱形结构的散热板为例，图7为图6的局部放大图。散热板11的对应于电路板22的区域朝向液晶屏21拱起；同时，拱形结构顶部与底反射片14底部的接触区域还设置有凸起结构115，从而减少散热板11与底反射片14的接触面积，减少散热板11 上的热量向底反射片14的传导，进而降低散热板11传导给导光板13的热量，降低导光板13在入光侧(即靠近灯条侧)因受热而导致变形不良的风险。
本实施例的显示装置中，显示面板和背光模组中的其他结构与实施例1或实施例2中显示装置的对应结构相同，这里不再详述。
与实施例1或实施例2相同，在本实施例的显示装置中，通过在散热板上设置拱形结构，既可以获得更好的散热效果，又可以减少散热板在对应于电路板的区域传导给背板的热量，降低电路板所在区域的温度，从而防止电子元器件的老化，延长电路板的寿命。
在实施例1-实施例3的显示装置中，通过在背光模组中的散热板对应于电路板的区域形成拱形结构，将例如灯条的光源产生的热量部分传导到背板靠近显示装置的内侧空间。一方面，能获得更好的散热效果；另一方面，减少了散热板在对应于电路板的区域传导给背板的热量，解决了在侧入式背光模组的入光侧与显示面板的电路板的数据线引出侧相同时热量较集中的问题，缓解了电路板区域的散热压力，提高了显示装置的使用寿命。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (11)

  1. 一种显示装置，包括背光模组和显示面板，所述背光模组包括导光板、散热板和光源，所述散热板包括散热板主体以及散热板侧体，所述散热板侧体垂直于所述散热板主体并且在所述散热板主体的至少一侧与所述散热板主体相连；所述显示面板包括液晶屏以及与所述液晶屏相连的电路板，所述液晶屏和所述电路板平行于所述散热板主体的设置方向设置且分别设置于所述散热板的两侧；其中，所述散热板主体的对应于所述电路板的区域的至少一部分与所述液晶屏之间的距离小于所述散热板主体的其他区域与所述液晶屏之间的距离。
  2. 根据权利要求1所述的显示装置，其中，在所述散热板主体的对应于所述电路板的区域，相对于所述电路板所在的平面形成朝向所述液晶屏的拱形结构。
  3. 根据权利要求2所述的显示装置，其中，所述显示装置还包括背板，所述电路板设置于所述背板远离所述散热板的一侧、且与所述散热板的拱形结构相对应。
  4. 根据权利要求3所述的显示装置，其中，所述拱形结构为单拱形结构。
  5. 根据权利要求3所述的显示装置，其中，所述拱形结构为包括至少两个相连孔的多拱形结构。
  6. 根据权利要求5所述的显示装置，其中，所述多拱形结构的相邻孔的连接部的底部与所述背板接触。
  7. 根据权利要求2-6中任一项所述的显示装置，其中，所述导光板设置于所述散热板与所述液晶屏之间，所述拱形结构的拱顶的设置方向与所述导光板的设置方向平行，所述拱形结构的拱顶设置有间隔分布的、凹凸配置的接触部件，且所述拱形结构的拱顶通过所述接触部件与所述导光板的底部相接触。
  8. 根据权利要求2-6中任一项所述的显示装置，其中，所述背光模组还包括底反射片，所述底反射片与所述导光板平行设置且位于所述导光板与所述散热板之间，所述底反射片的设置区域至少对应于所述导光板的中心区域。
  9. 根据权利要求8所述的显示装置，其中，所述拱形结构的拱顶 的设置方向与所述底反射片的设置方向平行，所述拱形结构的拱顶设置有间隔分布的凹槽结构或凸起结构、且所述拱形结构的拱顶与所述底反射片的底部相接触。
  10. 根据权利要求1-6中任一项所述的显示装置，其中，所述光源设置于所述散热板侧体上，且位于所述导光板的至少一侧。
  11. 根据权利要求3-6中任一项所述的显示装置，其中，所述散热板主体与所述背板通过螺丝连接或直接铆合连接。
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