WO2014047994A1 - 一种背光模组及液晶显示装置 - Google Patents

一种背光模组及液晶显示装置 Download PDF

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Publication number
WO2014047994A1
WO2014047994A1 PCT/CN2012/083378 CN2012083378W WO2014047994A1 WO 2014047994 A1 WO2014047994 A1 WO 2014047994A1 CN 2012083378 W CN2012083378 W CN 2012083378W WO 2014047994 A1 WO2014047994 A1 WO 2014047994A1
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WIPO (PCT)
Prior art keywords
light bar
backlight module
temperature
liquid crystal
crystal display
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/083378
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English (en)
French (fr)
Inventor
张彦学
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/701,036 priority Critical patent/US9016920B2/en
Publication of WO2014047994A1 publication Critical patent/WO2014047994A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the invention belongs to the field of liquid crystal display, and more particularly to a backlight module and a liquid crystal display device.
  • the liquid crystal display device of the prior art includes a liquid crystal display panel and a backlight module. Since the liquid crystal display panel cannot emit light, it is required to provide a surface light source with uniform illumination by the backlight module.
  • the backlight module generally includes a light guide plate. 2, the back plate 1 and the light bar 3, the light bar 3 belongs to the line light source, and the light guide plate 2 converts the line light source into a surface light source which can be used for the liquid crystal display panel. As shown in Figure 2, the light bar is located on the left side of the backlight module.
  • the heat dissipation in the middle of the light bar is slow, and the heat dissipation in the two ends is fast, so the temperature in the middle of the light bar is high, and the temperature in the two ends is high.
  • the aging speed and degree of the light bar are directly related to the working temperature. The higher the working temperature, the faster the aging speed, and the more severe the brightness decay. Due to the different working temperatures, the aging speed and degree of the lights on the two ends of the light bar are different from those in the middle area, resulting in different brightness, and the brightness of the entire light bar is no longer hooked, resulting in a brighter light at both ends of the light guide plate. Darker, reducing the taste of the backlight module.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device.
  • the entire light bar of the backlight module has a uniform operating temperature, a relatively uniform light emission, and a high optical taste.
  • the technical solution of the present invention is: a backlight module, comprising a light guide plate, a light bar and a back plate, wherein the light guide plate is disposed in the back plate, the light bar is disposed on a side of the light guide plate, and the backlight module is further A heating device for heating both ends of the light bar is included.
  • the heating device is disposed at the back of the light bar.
  • the heating device is disposed on the backboard to increase the operating temperature of the two ends of the light bar by heating the ambient temperature of the two ends of the light bar.
  • the number of the heating devices is two, and respectively corresponds to the positions of the two ends of the light bar.
  • the heating device is a ring-shaped resistance wire, the electric wire is small in volume, the heating power is easy to control, and the wire is not easily damaged.
  • the backlight module further includes a temperature controller, the temperature controller is disposed at two end regions of the light bar, and the temperature controller is electrically connected to the heating device.
  • the temperature controller is a thermostat controller.
  • the backlight module further includes a control chip, a temperature sensor for measuring the temperature of the two ends of the light bar, and a power adjusting device for adjusting the power of the heating device, wherein the temperature sensor and the power adjusting device are electrically connected to the control chip. .
  • the backlight module further includes a control chip, a temperature sensor for measuring the temperature of the two ends and the middle portion of the light bar, and a power adjusting device for adjusting the power of the heating device, wherein the temperature sensor and the power adjusting device are both controlled
  • the chip is electrically connected.
  • a liquid crystal display device comprising the backlight module described above.
  • the beneficial effects of the present invention are as follows:
  • the backlight module of the present invention is provided with a heating device, and the heating device is located at two end regions of the light bar, and the heating device generates heat when the light bar is working to improve the working temperature of the two ends of the light bar. , so that the working temperature of the two ends of the light bar is close to or equal to the temperature of the middle part of the light bar, so that the aging degree of the light on the light bar is nearly uniform, so that the brightness of the light emitted by the light bar after using for a long time is still relatively uniform.
  • Improve the optical taste of the backlight module improve the optical taste of the backlight module.
  • the heat dissipation structure or the heat dissipating device cannot be used to reduce the operating temperature in the central portion of the light bar to the operating temperature at the two ends of the light bar, thereby achieving a consistent operating temperature.
  • the heating device is used to increase the working temperature of the two ends of the light bar, so that the light bar obtains a relatively uniform working temperature, and solves the problem that the backlight module is not uniform due to the aging of the lamp on the light bar.
  • a liquid crystal display device comprising a backlight module and a PCB board
  • the backlight module includes a light guide plate, a light bar and a back plate
  • the light guide plate is disposed in the back plate.
  • Light bar It is disposed on a side of the light guide plate
  • the PCB board is provided with a high heat generating IC and a MOS tube, and the IC and the MOS tube on the PCB board are close to both end regions of the light bar.
  • the technical solution does not additionally add a heating device, but directly sets the two components IC and MOS tube which have the largest heat generation in the PCB board near the two ends of the light bar, because the IC and the MOS tube are in the steady state of operation.
  • the temperature is higher than the temperature at the two ends of the light bar, and is close to the temperature in the middle of the light bar, so the temperature of the two ends of the light bar can be increased, so that the uniformity of the overall temperature of the light bar tends to be uniform.
  • FIG. 1 is a schematic structural view of a backlight module in the prior art
  • Embodiment 3 is a schematic structural view of Embodiment 1 of a backlight module according to the present invention.
  • FIG. 4 is a temperature distribution diagram of the first embodiment of the backlight module of the present invention in a steady state;
  • FIG. 5 is a schematic rear view of the light bar of the second embodiment of the backlight module of the present invention.
  • the present invention discloses a liquid crystal display device, including a backlight module, as a first embodiment of the backlight module of the present invention.
  • the backlight module includes a light guide plate 2, a light bar 3 and a back plate. 1
  • the light guide plate 2 is disposed in the back plate 1
  • the light bar 3 is disposed on a side of the light guide plate 2
  • the backlight module further includes a heating device 4 for heating both ends of the light bar.
  • the heating device 4 is disposed on the backboard 1.
  • the number of the heating devices 4 is two, and corresponds to the positions of the two ends of the light bar 3 respectively, and the environment of the two ends of the light bar 3 is heated.
  • the temperature is increased to increase the operating temperature of the two ends of the light bar 3.
  • the heating device 4 is a ring-shaped electric resistance wire, and the electric wire is small in volume, the heating power is easy to control, and is not easily damaged.
  • the backlight module of the present invention is provided with a heating device 4, and the heating device 4 is located at two end regions of the light bar 3.
  • the heating device 4 When the light bar 3 is in operation, the heating device 4 generates heat to increase the working temperature of the two ends of the light bar 3.
  • the light bar 3 is located on the left side of the backlight module, so that the working temperature of the two ends of the light bar 3 is close to or
  • the temperature in the middle portion of the light bar 3 is such that the aging degree of the light on the light bar 3 is nearly uniform, so that the brightness of the light emitted by the light bar 3 after a long period of use is still relatively uniform, and the optical taste of the backlight module is improved.
  • the heat dissipation structure or the heat dissipating device cannot be used to reduce the operating temperature in the central portion of the light bar to the operating temperature at the two ends of the light bar, thereby achieving a consistent operating temperature.
  • the heating device is used to increase the working temperature of the two ends of the light bar, so that the light bar obtains a relatively uniform working temperature, and solves the problem that the backlight module is not uniform due to the aging of the lamp on the light bar.
  • the difference from the first embodiment is that the heating device 4 is disposed on the back of the light bar 3, and directly heats the two ends of the light bar 3, and other structures are beneficial.
  • the effects are the same as the examples - and will not be described here.
  • the backlight module may further be provided with a temperature controller, the temperature controller is disposed at two end regions of the light bar, and the temperature controller is electrically connected to the heating device, generally
  • the temperature controller is disposed at two end regions of the light bar, and the temperature controller is electrically connected to the heating device, generally
  • the temperature controller is turned on to make the heating device work.
  • the temperature controller is disconnected to stop the heating device, so that the two ends of the light bar are kept within a certain temperature range.
  • the narrower the temperature range the better the temperature range is closer to the working temperature in the middle of the light bar.
  • the temperature controller uses a thermostat controller, it can ensure the consistency of the working temperature of the entire light bar.
  • the backlight module may further include a control chip, a temperature sensor for measuring the temperature of the two ends of the light bar, and a power adjusting device for adjusting the power of the heating device, the temperature sensor And the power adjustment device is electrically connected to the control chip. Since the temperature of the light bar is only changed within a small range when the light bar of the liquid crystal display device is in a steady state, the temperature of the two ends of the light bar is measured by the temperature sensor in this embodiment.
  • the power adjustment device is used to increase the heating.
  • the power of the device increase the amount of heat, to improve the light bar.
  • the temperature of the two ends of the strip makes the temperature of the two ends of the strip converge with the temperature of the middle area, so that the aging degree of the lamp on the strip is nearly uniform, and the optical taste of the backlight module is improved.
  • the backlight module further includes a control chip, a temperature sensor for measuring the temperature of the two ends and the middle portion of the light bar, and a power adjusting device for adjusting the power of the heating device,
  • the temperature sensor and the power adjusting device are electrically connected to the control chip.
  • the temperature sensor can measure the temperature at the two ends and the middle portion of the light bar, and the temperature at both ends of the light bar is directly compared with the temperature in the central portion of the light bar. Then, according to the comparison result, the control chip controls the power adjustment device to increase or decrease the heating power. Since the temperature data used is directly measured, it is more accurate and can ensure the uniformity of the overall temperature of the light bar to the utmost extent.
  • the backlight module includes a light guide plate, a light bar and a back plate, and the light guide plate is disposed in the back plate, and the light bar is disposed.
  • the PCB board is provided with a high heat generating IC and a MOS tube, and the IC and MOS tubes on the PCB board are close to both end regions of the light bar.
  • the technical solution does not additionally add a heating device, but directly sets the two components IC and MOS tube which have the largest heat generation in the PCB board near the two ends of the light bar, because the IC and the MOS tube are in the steady state of operation.
  • the temperature is higher than the temperature at the two ends of the light bar, and is close to the temperature in the middle of the light bar, so the temperature of the two ends of the light bar can be increased, so that the uniformity of the overall temperature of the light bar tends to be uniform.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Resistance Heating (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)

Description

【技术领域】
本发明属于液晶显示领域， 更具体的说， 涉及一种背光模组及液晶显示装 置。
【背景技术】
现有技术中液晶显示装置包括液晶显示面板和背光模组， 由于液晶显示面 板不能发光， 所以需要由背光模组提供发光均匀的面光源， 如图 1 所示， 背光 模组一般又包括导光板 2、 背板 1和灯条 3 , 灯条 3属于线光源， 导光板 2把线 光源转化为可以供液晶显示面板使用的面光源。 如图 2所示， 灯条位于背光模 组的左侧， 由于灯条为长条状， 灯条中部区域散热慢， 两端区域散热快， 所以 导致灯条中部区域温度高， 两端区域温度低， 灯条的老化速度及程度与工作温 度直接相关， 工作温度越高， 老化速度越快， 亮度衰减越严重。 由于工作温度 不同， 灯条上两端区域的灯与中部区域的灯老化速度和程度不同， 导致亮度不 同， 整个灯条光线亮度不再均勾， 最终导致导光板两端区域较亮， 中部区域较 暗， 降低了背光模组的品味。
【发明内容】
本发明所要解决的技术问题是提供一种背光模组及液晶显示装置， 所述背 光模组的整个灯条工作温度均匀， 发出光线也比较均匀， 具有较高的光学品味。
本发明的技术方案为： 一种背光模组， 包括导光板、 灯条和背板， 所述导 光板设置在背板内， 所述灯条设置在导光板的侧面， 所述背光模组还包括用于 加热灯条两端的加热装置。
优选的， 所述加热装置设置在灯条背部。
优选的， 所述加热装置设置在背板上， 通过加热灯条两端区域的环境温度， 来提高灯条两端区域的工作温度。 优选的， 所述加热装置数量为两个， 并分别与灯条两端位置相对应。
优选的， 所述加热装置为环形电阻丝， 电组丝体积小， 发热功率容易控制， 且不易损坏。
优选的， 所述背光模组还包括温度控制器， 所述温度控制器设置在灯条的 两端区域， 所述温度控制器与加热装置电连接。
优选的， 所述温度控制器为恒温控制器。
优选的， 所述背光模组还包括控制芯片、 用于测量灯条两端温度的温度传 感器和用于调整加热装置功率的功率调整装置， 所述温度传感器和功率调整装 置均与控制芯片电连接。
优选的， 所述背光模组还包括控制芯片、 用于测量灯条两端和中部区域温 度的温度传感器和用于调整加热装置功率的功率调整装置， 所述温度传感器和 功率调整装置均与控制芯片电连接。
本发明还公开了另一种技术方案： 一种液晶显示装置， 包括上面所述的背 光模组。
本发明的有益效果为： 本发明所述背光模组上设有加热装置， 所述加热装 置位于灯条的两端区域， 在灯条工作时加热装置发热以提高灯条两端区域的工 作温度， 使灯条两端区域的工作温度接近或等于灯条中部区域的温度， 使灯条 上的灯老化程度接近一致， 从而使灯条的在使用较长一段时间后发出的光线亮 度仍然比较均匀， 提高背光模组的光学品味。
现有技术中， 由于结构限制， 无法利用散热结构或散热装置使灯条中部区 域的工作温度降低为灯条两端区域的工作温度， 进而达到均勾一致的工作温度， 本发明运用反向思维， 利用加热装置提高灯条两端区域的工作温度， 使灯条获 得较均勾的工作温度， 解决了灯条上灯老化程度不一致导致的背光模组光线不 均匀的难题。
本发明的另一种技术方案为： 一种液晶显示装置， 包括背光模组和 PCB板， 所述背光模组包括导光板、 灯条和背板， 所述导光板设置在背板内， 所述灯条 设置在导光板的侧面， 所述 PCB板上设有高发热量的 IC和 MOS管， 所述 PCB 板上的 IC和 MOS管靠近灯条的两端区域。
本技术方案不另外加设加热装置， 而是直接把 PCB板中发热量最大的两种 元器件 IC和 MOS管设置在靠近灯条两端区域处， 由于 IC和 MOS管处于工作 稳态时的温度高于灯条两端区域的温度， 接近灯条中部区域的温度， 所以可以 提高灯条两端区域的温度， 从而使灯条整体温度的均匀度趋于一致。
【附图说明】
图 1是现有技术中背光模组的结构示意图；
图 2是现有技术中背光模组的工作处于稳态时的温度分布图；
图 3是本发明所述背光模组实施例一的结构示意图；
图 4是本发明所述背光模组实施例一工作处于稳态时的温度分布图； 图 5是本发明所述背光模组实施例二中灯条的背面示意图。
【具体实施方式】
本发明公开一种液晶显示装置， 包括背光模组， 作为本发明背光模组的实 施例一， 如图 3和图 4所示， 所述背光模组包括导光板 2、 灯条 3和背板 1 , 所 述导光板 2设置在背板 1内， 所述灯条 3设置在导光板 2的侧面， 所述背光模 组还包括用于加热灯条两端的加热装置 4。
在本实施例中， 所述加热装置 4设置在背板 1上， 所述加热装置 4数量为 两个， 并分别与灯条 3两端位置相对应， 通过加热灯条 3两端区域的环境温度， 来提高灯条 3两端区域的工作温度， 所述加热装置 4为环形电阻丝， 电组丝体 积小， 发热功率容易控制， 且不易损坏。
本发明所述背光模组上设有加热装置 4,所述加热装置 4位于灯条 3的两端 区域， 在灯条 3工作时加热装置 4发热以提高灯条 3两端区域的工作温度， 如 图 4所示， 灯条 3位于背光模组的左侧， 使灯条 3两端区域的工作温度接近或 等于灯条 3中部区域的温度， 使灯条 3上的灯老化程度接近一致， 从而使灯条 3 的在使用较长一段时间后发出的光线亮度仍然比较均匀， 提高背光模组的光学 品味。
现有技术中， 由于结构限制， 无法利用散热结构或散热装置使灯条中部区 域的工作温度降低为灯条两端区域的工作温度， 进而达到均勾一致的工作温度， 本发明运用反向思维， 利用加热装置提高灯条两端区域的工作温度， 使灯条获 得较均勾的工作温度， 解决了灯条上灯老化程度不一致导致的背光模组光线不 均匀的难题。
作为本发明背光模组的实施例二， 如图 5所示， 与实施例一不同之处在于 所述加热装置 4设置在灯条 3背部， 直接加热灯条 3两端区域， 其它结构及有 益效果均与实施例——致， 此处不再赘述。
作为本发明背光模组的另一实施例，所述背光模组还可以设置温度控制器， 所述温度控制器设置在灯条的两端区域， 所述温度控制器与加热装置电连接， 一般情况下， 首先根据经验及通过实验获取灯条工作处于稳态时中部区域的温 度， 然后选取合适的温度控制器， 当低于设定温度时， 温度控制器导通使加热 装置工作， 当高于设定温度时， 温度控制器断路使加热装置停止工作， 从而使 灯条两端区域保持在一定的温度范围内， 温度范围越窄越好， 温度范围越接近 灯条中部区域的工作温度越好， 如果温度控制器选用恒温控制器则更能保证整 个灯条工作温度的一致性。
作为本发明背光模组的另一实施例， 所述背光模组还可以包括控制芯片、 用于测量灯条两端温度的温度传感器和用于调整加热装置功率的功率调整装 置， 所述温度传感器和功率调整装置均与控制芯片电连接， 由于液晶显示装置 灯条处于工作稳态时， 灯条上的温度只会在较小的范围内变动， 本实施例通过 温度传感器测量灯条两端的温度， 并与灯条中部区域处于稳态时的经验温度数 据相对比， 当测量到的灯条两端温度小于灯条中部区域处于稳态时的经验温度 数据时， 就利用功率调整装置加大加热装置的功率， 增加发热量， 来提高灯条 两端区域的温度， 当测量到的灯条两端温度大于灯条中部区域处于稳态时的经 验温度数据时， 就利用功率调整装置减小加热装置的功率， 减小发热量， 来降 低灯条两端区域的温度， 使灯条两端区域的温度与中部区域的温度趋于一致， 从而使灯条上的灯老化程度接近一致， 提高背光模组的光学品味。
作为本发明背光模组的另一实施例， 所述背光模组还包括控制芯片、 用于 测量灯条两端和中部区域温度的温度传感器和用于调整加热装置功率的功率调 整装置， 所述温度传感器和功率调整装置均与控制芯片电连接， 与上实施例不 同之处温度传感器可以测量灯条两端和中部区域的温度， 灯条两端的温度与灯 条中部区域的温度进行直接对比， 然后根据对比结果， 控制芯片控制功率调整 装置加大或减小加热功率， 由于使用的温度数据是直接测量的， 所以更准确， 能最大程度保证灯条整体温度的一致性。
作为本发明液晶显示装置的另一个实施例， 包括背光模组和 PCB板， 所述 背光模组包括导光板、 灯条和背板， 所述导光板设置在背板内， 所述灯条设置 在导光板的侧面， 所述 PCB板上设有高发热量的 IC和 MOS管， 所述 PCB板 上的 IC和 MOS管靠近灯条的两端区域。
本技术方案不另外加设加热装置， 而是直接把 PCB板中发热量最大的两种 元器件 IC和 MOS管设置在靠近灯条两端区域处， 由于 IC和 MOS管处于工作 稳态时的温度高于灯条两端区域的温度， 接近灯条中部区域的温度， 所以可以 提高灯条两端区域的温度， 从而使灯条整体温度的均匀度趋于一致。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1、 一种背光模组， 包括： 导光板、 灯条和背板， 所述导光板设置在背板内， 所述灯条设置在导光板的侧面， 所述背光模组还包括用于加热灯条两端的加热 装置。
2、 根据权利要求 1所述的背光模组， 其中， 所述加热装置设置在灯条背部 或者设置在背板上。
3、 根据权利要求 1所述的背光模组， 其中， 所述加热装置数量为两个， 并 分别与灯条两端位置相对应。
4、 根据权利要求 1所述的背光模组， 其中， 所述加热装置为环形电阻丝。
5、 根据权利要求 1所述的背光模组， 其中， 所述背光模组还包括温度控制 器， 所述温度控制器设置在灯条的两端区域， 所述温度控制器与加热装置电连 接。
6、根据权利要求 5所述的背光模组， 其中， 所述温度控制器为恒温控制器。
7、根据权利要求 1所述的背光模组， 其中， 所述背光模组还包括控制芯片、 用于测量灯条两端温度的温度传感器和用于调整加热装置功率的功率调整装 置， 所述温度传感器和功率调整装置均与控制芯片电连接。
8、根据权利要求 1所述的背光模组， 其中， 所述背光模组还包括控制芯片、 用于测量灯条两端和中部区域温度的温度传感器和用于调整加热装置功率的功 率调整装置， 所述温度传感器和功率调整装置均与控制芯片电连接。
9、 一种液晶显示装置， 包括背光模组， 所述背光模组包括： 导光板、 灯条 和背板， 所述导光板设置在背板内， 所述灯条设置在导光板的侧面， 所述背光 模组还包括用于加热灯条两端的加热装置。
10、 根据权利要求 9所述的液晶显示装置， 其中， 所述加热装置设置在灯 条背部或者设置在背板上。
11、 根据权利要求 9所述的液晶显示装置， 其中， 所述加热装置数量为两 个， 并分别与灯条两端位置相对应。
12、 根据权利要求 9所述的液晶显示装置， 其中， 所述加热装置为环形电 阻丝。
13、 根据权利要求 9所述的液晶显示装置， 其中， 所述背光模组还包括温 度控制器， 所述温度控制器设置在灯条的两端区域， 所述温度控制器与加热装 置电连接。
14、 根据权利要求 13所述的液晶显示装置， 其中， 所述温度控制器为恒温 控制器。
15、 根据权利要求 9所述的液晶显示装置， 其中， 所述背光模组还包括控 制芯片、 用于测量灯条两端温度的温度传感器和用于调整加热装置功率的功率 调整装置， 所述温度传感器和功率调整装置均与控制芯片电连接。
16、 根据权利要求 9所述的液晶显示装置， 其中， 所述背光模组还包括控 制芯片、 用于测量灯条两端和中部区域温度的温度传感器和用于调整加热装置 功率的功率调整装置， 所述温度传感器和功率调整装置均与控制芯片电连接。
17、 一种液晶显示装置， 包括背光模组和 PCB板， 所述背光模组包括导光 板、 灯条和背板， 所述导光板设置在背板内， 所述灯条设置在导光板的侧面， 所述 PCB板上设有高发热量的 IC和 MOS管， 所述 PCB板上的 IC和 MOS管 靠近灯条的两端区域。
PCT/CN2012/083378 2012-09-27 2012-10-23 一种背光模组及液晶显示装置 Ceased WO2014047994A1 (zh)

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