WO2017161759A1 - 一种背光模组及显示设备 - Google Patents

一种背光模组及显示设备 Download PDF

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WO2017161759A1
WO2017161759A1 PCT/CN2016/088972 CN2016088972W WO2017161759A1 WO 2017161759 A1 WO2017161759 A1 WO 2017161759A1 CN 2016088972 W CN2016088972 W CN 2016088972W WO 2017161759 A1 WO2017161759 A1 WO 2017161759A1
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emitting diode
light emitting
backlight module
lens
light
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PCT/CN2016/088972
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English (en)
French (fr)
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付常佳
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乐视控股（北京）有限公司
乐视致新电子科技（天津）有限公司
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Priority to US15/246,452 priority Critical patent/US20170277001A1/en
Publication of WO2017161759A1 publication Critical patent/WO2017161759A1/zh

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  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • a backlight module of a liquid crystal display device generally uses a light-emitting diode (LED) as a light source.
  • the backlight module can be divided into a direct-input type and a side-input type.
  • the light source of the direct-input type backlight module is distributed under the diffusion board, and the backlight module is mainly applied to the backlight unit.
  • Large-size LCD display devices such as monitors and TVs.
  • a display device using a direct-lighting type backlight module generally has defects such as low brightness, dark shadow on the LED, or dark bands on the edge. Therefore, how to improve the picture quality of the display device is a technical problem to be solved in the present application.
  • the invention provides a backlight module and a display device to improve the picture quality of the display device.
  • the backlight module provided by the present invention includes a backing plate having an accommodating space, a reflection sheet sequentially disposed in the accommodating space of the backboard, a light source assembly, and a diffusion plate, wherein:
  • the light source assembly includes a plurality of first LED devices and a plurality of second LED devices, the second LED device having an illumination angle smaller than an illumination angle of the first LED device, the plurality of first LED devices being arranged in a ring And in a position opposite to a peripheral region of the diffusion plate, the plurality of second LED devices are located inside the plurality of first LED devices.
  • each of the first LED devices has an illumination angle of 150° to 170°
  • each of the second LED devices has an illumination angle of 90° to 120°.
  • each of the first LED devices comprises a package-mounted LED chip and a reflective lens
  • each second LED device comprising a package-mounted LED chip and a refractive lens
  • the reflective lens comprises a reflective glass lens, a reflective polycarbonate lens or a reflective polymethyl methacrylate lens
  • the refractive lens comprises a refractive glass lens, a refractive polycarbonate lens or Refractive polymethyl methacrylate lens.
  • the plurality of first LED devices are evenly distributed, and the plurality of second LED devices are evenly distributed.
  • the plurality of first LED devices are arranged in a ring shape and are opposite to the peripheral region of the diffusion plate. Since the illumination angle of the first LED device is relatively large, more light may be incident on the diffusion.
  • the edge of the board is effective to improve the edge dark band phenomenon of the backlight module picture; the plurality of second LED devices are located inside the plurality of first LED devices, and since the illumination angle of the second LED device is relatively small, the light can be compared
  • the concentrated injection into the diffuser plate effectively improves the brightness of the backlight module and the phenomenon of light and shadow.
  • the backlight module provided by the invention is applied to a display device, and can effectively improve the picture quality of the display device.
  • the present invention also provides a display device, including the backlight module of any of the foregoing technical solutions. Since the backlight module has the above-mentioned advantageous effects, the display device has a high picture quality.
  • the display device comprises a liquid crystal television, a liquid crystal display or a liquid crystal display screen.
  • FIG. 1 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention
  • FIG. 2 is a top plan view of a light source assembly of a backlight module according to an embodiment of the present invention
  • FIG. 3 is a schematic view of a first LED device
  • FIG. 4 is a schematic view of a second LED device.
  • a backlight module includes a backplane 1 having an accommodating space, a reflective sheet 2 disposed in the accommodating space of the backplane 1, and a light source assembly 3 and diffusion. Board 4, where:
  • the light source assembly 3 includes a plurality of first LED devices 31 and a plurality of second LED devices 32.
  • the illumination angle of the second LED device 32 is smaller than the illumination angle of the first LED device 31, and the plurality of first LED devices 31 are arranged in a ring shape.
  • the plurality of second LED devices 32 are located inside the plurality of first LED devices 31 as opposed to the peripheral region of the diffusion plate 4.
  • the backlight module is a direct-lighting backlight module, and the light emitted by the LED device is incident on the bottom of the diffusion plate.
  • LED light source assemblies typically include a printed circuit board and LED devices disposed on the printed circuit board.
  • the backlight module usually includes optical film, plastic frame and the like, which are not shown in the drawings.
  • the plurality of first LED devices 31 are arranged in a ring shape and are opposite to the peripheral region of the diffusion plate 4, and it can be understood that the orthographic projection of the plurality of first LED devices 31 on the diffusion plate 4 is located on the diffusion plate 4. In the region near the edge, since the light emitted from the first LED device 31 is diverged at a certain illumination angle, it can be incident on the peripheral region of the diffusion plate 4 including the edge position.
  • the plurality of second LED devices 32 are located inside the plurality of first LED devices 31, which means that the plurality of second LED devices 32 are located inside the annular array formed by the plurality of first LED devices 31.
  • the plurality of first LED devices 31 are arranged in a ring shape and The peripheral regions of the diffusing plate 4 are opposite in position. Since the light emitting angle of the first LED device 31 is relatively large, more light can be incident on the edge of the diffusing plate 4, thereby effectively improving the edge dark band phenomenon of the backlight module image.
  • the plurality of second LED devices 32 are located inside the plurality of first LED devices 31. Since the illumination angle of the second LED device 32 is relatively small, the light can be more concentrated into the diffusion plate 4, thereby effectively improving the backlight mode. The brightness of the group picture is low, and the light is shadowed.
  • the backlight module provided by the embodiment of the invention is applied to a display device, which can effectively improve the picture quality of the display device.
  • each of the first LED devices 31 has an illumination angle of 150° to 170°, and each of the second LED devices 32 has an illumination angle of 90° to 120°.
  • the plurality of first LED devices 31 are evenly distributed, and the plurality of second LED devices 32 are evenly distributed.
  • each of the first LED devices 31 includes a package-mounted LED chip 30 and a reflective lens 311, as shown in FIG. 4, each of the second LED devices 32 including a package.
  • the assembled LED chip 30 and the refractive lens 321 are provided.
  • the LED device Since the LED chip is small in size, compact in structure, and has a small light-emitting area, the LED device needs to be designed for secondary optical structure according to the application in specific applications, thereby shaping and changing the light emitted by the LED chip, and adjusting the illumination of the LED device. Angle and intensity distribution.
  • the lens and the LED chip package can change the illumination angle, thereby changing the size of the light beam, and functioning to change the illumination area and the illumination value of the surface of the object to be illuminated.
  • the first LED device 31 adopts a reflective lens 311, and the surface of the lens has a concave shape.
  • the light emitted by the LED chip 30 passes through the reflective lens 311, and the divergence angle is large, so that more light can be emitted.
  • the edge of the diffusion plate 4 is inserted, thereby effectively improving the edge dark band phenomenon of the backlight module picture.
  • the second LED device 32 adopts a refractive lens 321 having a dome shape.
  • the light emitted by the LED chip 30 passes through the refractive lens 321 and has a relatively small divergence angle, and can be concentrated into the diffusing plate 4, thereby effectively improving the backlight.
  • the brightness of the module screen is low, and the light is shadowed.
  • the reflective lens 311 and the refractive lens 321 are not limited to those shown in FIGS. 3 and 4, and the type of material is not limited.
  • the reflective lens 311 may be a reflective glass lens, a reflective polycarbonate lens, or a reflection. Polymethyl methacrylate lens, etc.; refractive lens 321 can be a refractive glass lens, a refractive polycarbonate lens or a refractive polymethyl methacrylate lens, and the like.
  • the embodiment of the invention further provides a display device, comprising the backlight module of any of the foregoing technical solutions. Since the backlight module has the above-mentioned advantageous effects, the display device has a high picture quality. Display
  • the specific type of the device is not limited.
  • the display device may be a liquid crystal television, a liquid crystal display, or a liquid crystal display screen.

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Abstract

一种背光模组及显示设备。背光模组包括具有容置空间的背板（1）、顺序放置于背板（1）的容置空间内的反射片（2）、光源组件（3）和扩散板（4），其中：光源组件（3）包括多个第一发光二极管器件（31）和多个第二发光二极管器件（32），第二发光二极管器件（32）的发光角度小于第一发光二极管器件（31）的发光角度，多个第一发光二极管器件（31）排列呈环状并与扩散板（4）的周边区域位置相对，多个第二发光二极管器件（32）位于多个第一发光二极管器件（31）的内侧。第一发光二极管器件（31）的发光角度相对较大，因此可以有较多的光线射入扩散板（4）的边缘，从而改善背光模组画面的边缘暗带现象；第二发光二极管器件（32）的发光角度相对较小，因此光线可以较集中的射入扩散板（4），从而改善背光模组画面的亮度低、灯影等现象。

Description

一种背光模组及显示设备
本申请要求在2016年03月22日提交中国专利局、申请号为201620231141.9、实用新型名称为“一种背光模组及显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示技术领域，特别是涉及一种背光模组及显示设备。
背景技术
随着科技的不断进步，消费者对平板显示器、平板电视等显示设备的需求也在不断提升，显示设备的结构、外观、性能等各个方面的更新也日益频繁。
目前，液晶显示设备的背光模组普遍采用LED(light-emitting diode，发光二极管，简称LED)作为光源。根据光源的分布位置，背光模组可分为直下入光式和侧入光式两种，其中，直下入光式背光模组的光源分布于扩散板的下方，该类背光模组主要应用于显示器、电视等大尺寸液晶显示设备。
现有采用直下入光式背光模组的显示设备，其画面通常存在亮度低、LED上方暗影或边缘暗带等缺陷。因此，如何提高显示设备的画面品质是本申请亟待解决的技术问题。
发明内容
本发明提供了一种背光模组及显示设备，以提高显示设备的画面品质。
本发明提供的背光模组，包括具有容置空间的背板、顺序放置于所述背板的容置空间内的反射片、光源组件和扩散板，其中：
所述光源组件包括多个第一LED器件和多个第二LED器件，所述第二LED器件的发光角度小于所述第一LED器件的发光角度，所述多个第一LED器件排列呈环状并与扩散板的周边区域位置相对，所述多个第二LED器件位于所述多个第一LED器件的内侧。
优选的，每个第一LED器件的发光角度为150°～170°，每个第二LED器件的发光角度为90°～120°。
优选的，每个第一LED器件包括封装装配的LED芯片和反射式透镜，每个第二LED器件包括封装装配的LED芯片和折射式透镜。
可选的，所述反射式透镜包括反射式玻璃透镜、反射式聚碳酸酯透镜或反射式聚甲基丙烯酸甲酯透镜；所述折射式透镜包括折射式玻璃透镜、折射式聚碳酸酯透镜或折射式聚甲基丙烯酸甲酯透镜。
优选的，所述多个第一LED器件均匀分布，所述多个第二LED器件均匀分布。
在本发明技术方案中，多个第一LED器件排列呈环状并与扩散板的周边区域位置相对，由于第一LED器件的发光角度相对较大，因此，可以有较多的光线射入扩散板的边缘，从而有效改善背光模组画面的边缘暗带现象；多个第二LED器件位于多个第一LED器件的内侧，由于第二LED器件的发光角度相对较小，因此，光线可以较集中的射入扩散板，从而有效改善背光模组画面的亮度低、灯影等现象。本发明提供的背光模组应用于显示设备，可以有效提高显示设备的画面品质。
本发明还提供一种显示设备，包括前述任一技术方案所述的背光模组。由于背光模组具有上述有益效果，因此，显示设备具有较高的画面品质。
可选的，所述显示设备包括液晶电视、液晶显示器或液晶展示屏。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例背光模组的截面结构示意图；
图2为本发明实施例背光模组的光源组件俯视图；
图3为第一LED器件示意图；
图4为第二LED器件示意图。
附图标记：
1-背板
2-反射片
3-光源组件
4-扩散板
31-第一LED器件
32-第二LED器件
30-LED芯片
311-反射式透镜
321-折射式透镜
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
如图1和图2所示，本发明实施例提供的背光模组，包括具有容置空间的背板1、顺序放置于背板1的容置空间内的反射片2、光源组件3和扩散板4，其中：
光源组件3包括多个第一LED器件31和多个第二LED器件32，第二LED器件32的发光角度小于第一LED器件31的发光角度，多个第一LED器件31排列呈环状并与扩散板4的周边区域位置相对，多个第二LED器件32位于多个第一LED器件31的内侧。
上述背光模组为直下入光式背光模组，LED器件发出的光线射入扩散板的底部。LED光源组件一般包括印刷电路板和设置在印刷电路板上的LED器件。背光模组除包含上述背板1、反射片2、光源组件3和扩散板4外，通常还包括光学膜片、胶框等部件，在图中未一一予以示出。
上述实施例中，多个第一LED器件31排列呈环状并与扩散板4的周边区域位置相对，可以理解为，多个第一LED器件31在扩散板4上的正投影位于扩散板4靠近边缘的区域，由于第一LED器件31发出的光线呈一定发光角度的发散，因此，可以射入扩散板4包括边缘位置的周边区域。多个第二LED器件32位于多个第一LED器件31的内侧，则是指，多个第二LED器件32位于多个第一LED器件31所形成的环状排列的内侧。
在本发明实施例的技术方案中，多个第一LED器件31排列呈环状并与 扩散板4的周边区域位置相对，由于第一LED器件31的发光角度相对较大，因此，可以有较多的光线射入扩散板4的边缘，从而有效改善背光模组画面的边缘暗带现象；多个第二LED器件32位于多个第一LED器件31的内侧，由于第二LED器件32的发光角度相对较小，因此，光线可以较集中的射入扩散板4，从而有效改善背光模组画面的亮度低、灯影等现象。本发明实施例提供的背光模组应用于显示设备，可以有效提高显示设备的画面品质。
可参考图1所示，优选的，每个第一LED器件31的发光角度为150°～170°，每个第二LED器件32的发光角度为90°～120°。如图2所示，多个第一LED器件31均匀分布，多个第二LED器件32均匀分布。采用该设计，边缘暗带、亮度低、灯影等画质缺陷得以改善，并且背光模组的画面均一性较好。
在本发明的优选实施例中，如图3所示，每个第一LED器件31包括封装装配的LED芯片30和反射式透镜311，如图4所示，每个第二LED器件32包括封装装配的LED芯片30和折射式透镜321。
由于LED芯片体积小、结构紧凑，发光面积较小，因此LED器件在具体应用时，需要根据应用场合进行二次光学结构设计，从而对LED芯片发出的光进行整形和改变，调整LED器件的发光角度和光强分布。将透镜与LED芯片封装能够改变发光角度，从而改变光束的大小，起到改变被照物表面照明面积和照度值的作用。
在本发明的优选实施例中，第一LED器件31采用反射式透镜311，透镜表面具有凹陷形状，LED芯片30发出的光经过反射式透镜311后发散角度较大，可以使较多的光线射入扩散板4的边缘，从而有效改善背光模组画面的边缘暗带现象。第二LED器件32采用折射式透镜321，透镜表面具有拱起形状，LED芯片30发出的光经过折射式透镜321后发散角度相对较小，可以较集中的射入扩散板4，从而有效改善背光模组画面的亮度低、灯影等现象。
反射式透镜311和折射式透镜321的具体结构形式不限于图3和图4所示，并且材质类型不限，例如，反射式透镜311可以为反射式玻璃透镜、反射式聚碳酸酯透镜或反射式聚甲基丙烯酸甲酯透镜，等等；折射式透镜321可以为折射式玻璃透镜、折射式聚碳酸酯透镜或折射式聚甲基丙烯酸甲酯透镜，等等。
本发明实施例还提供一种显示设备，包括前述任一技术方案的背光模组。由于背光模组具有上述有益效果，因此，显示设备具有较高的画面品质。显 示设备的具体类型不限，例如显示设备可以为液晶电视、液晶显示器或液晶展示屏等。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (7)

  1. 一种背光模组，包括具有容置空间的背板、顺序放置于所述背板的容置空间内的反射片、光源组件和扩散板，其特征在于：
    所述光源组件包括多个第一发光二极管器件和多个第二发光二极管器件，所述第二发光二极管器件的发光角度小于所述第一发光二极管器件的发光角度，所述多个第一发光二极管器件排列呈环状并与扩散板的周边区域位置相对，所述多个第二发光二极管器件位于所述多个第一发光二极管器件的内侧。
  2. 根据权利要求1所述的背光模组，其特征在于，每个第一发光二极管器件的发光角度为150°～170°，每个第二发光二极管器件的发光角度为90°～120°。
  3. 根据权利要求1所述的背光模组，其特征在于，每个第一发光二极管器件包括封装装配的发光二极管芯片和反射式透镜，每个第二发光二极管器件包括封装装配的发光二极管芯片和折射式透镜。
  4. 根据权利要求3所述的背光模组，其特征在于，所述反射式透镜包括反射式玻璃透镜、反射式聚碳酸酯透镜或反射式聚甲基丙烯酸甲酯透镜；所述折射式透镜包括折射式玻璃透镜、折射式聚碳酸酯透镜或折射式聚甲基丙烯酸甲酯透镜。
  5. 根据权利要求1～4任一项所述的背光模组，其特征在于，所述多个第一发光二极管器件均匀分布，所述多个第二发光二极管器件均匀分布。
  6. 一种显示设备，其特征在于，包括如权利要求1～5任一项所述的背光模组。
  7. 如权利要求6所述的显示设备，其特征在于，所述显示设备包括液晶电视、液晶显示器或液晶展示屏。
PCT/CN2016/088972 2016-03-22 2016-07-06 一种背光模组及显示设备 WO2017161759A1 (zh)

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CN108761854B (zh) * 2018-04-26 2019-09-10 武汉华星光电技术有限公司 光源模组、背光模组及液晶显示装置
TWI703386B (zh) * 2019-07-31 2020-09-01 友達光電股份有限公司 背光模組
CN113641035A (zh) * 2021-03-23 2021-11-12 达亮电子(滁州)有限公司 背光模组以及显示装置
CN114141140A (zh) * 2021-11-01 2022-03-04 深圳市高展光电有限公司 防蓝光显示屏组件
CN114326214A (zh) * 2022-01-20 2022-04-12 阿纳克斯（苏州）轨道***有限公司 一种固定发光角度的led显示器背光结构
CN114415426B (zh) * 2022-02-17 2022-11-29 深圳创维－Rgb电子有限公司 一种Mini LED模组及其显示设备
CN116149098B (zh) * 2023-04-18 2023-06-27 惠科股份有限公司 显示装置
CN116449605A (zh) * 2023-04-19 2023-07-18 惠科股份有限公司 背光模组及显示设备

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