WO2017173703A1 - 一种背光模组以及液晶显示器 - Google Patents

一种背光模组以及液晶显示器 Download PDF

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Publication number
WO2017173703A1
WO2017173703A1 PCT/CN2016/082301 CN2016082301W WO2017173703A1 WO 2017173703 A1 WO2017173703 A1 WO 2017173703A1 CN 2016082301 W CN2016082301 W CN 2016082301W WO 2017173703 A1 WO2017173703 A1 WO 2017173703A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
concave
disposed
concave unit
liquid crystal
Prior art date
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PCT/CN2016/082301
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English (en)
French (fr)
Inventor
樊勇
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/104,253 priority Critical patent/US20180101061A1/en
Publication of WO2017173703A1 publication Critical patent/WO2017173703A1/zh

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Classifications

    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a liquid crystal display.
  • TFT-LCD thin film transistor-liquid crystal In the display, thin film transistor liquid crystal display
  • the TFT-LCD panel since the TFT-LCD panel itself does not emit light, it needs to be displayed by means of an external light source.
  • a light source has two kinds of backlights and a reflective light source, since the backlight light source does not need to be subjected to environmental changes. Therefore, the light sources in current TFT-LCD displays are almost all backlight sources.
  • LED Light Emitting Diode
  • TFT-LCD backlights the type of light source has undergone a CCFL (Cold Cathode Fluorescent) Lamp, cold cathode fluorescent tube) to LED (Light Emitting) Diode, LED) two light sources.
  • LEDs have become the mainstream of backlights due to their small size, fast response time, long life, non-breaking, high color gamut and many types of packages.
  • LED backlights can be basically divided into side-lit backlights and direct-lit backlights.
  • the direct type backlight has a wide application due to the small number of light sources and no light guide plate, and has been widely used, but the light sources easily interfere with each other, so that the area control ability of the liquid crystal display is weakened, and the dynamics of the liquid crystal display are reduced. Contrast.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display, which can enhance the regional light control capability of the liquid crystal display and improve the dynamic contrast of the display screen.
  • a technical solution adopted by the present invention is to provide a backlight module, the backlight module includes: a back plate including a plurality of concave units arranged in an array; and a light source disposed on the inner bottom surface of the concave unit .
  • the backlight module further includes: a reflective sheet disposed on an inner side surface of the concave unit.
  • the concave unit is composed of a plurality of side surfaces and a bottom surface, and the opening area of the concave unit is larger than the area of the bottom surface.
  • the bottom surface is a plane or a curved surface
  • the light source is disposed at the center of the bottom surface; or the bottom surface is a bent structure, and the light source is disposed at a bend of the bottom surface.
  • the side is a plane or a curved surface.
  • the number of sides is four, and the bottom surface and the opening are both rectangular.
  • the backlight module further includes: a diffusion plate disposed above the opening of the concave unit; and an optical film disposed on a side of the diffusion plate facing away from the concave unit.
  • the concave unit on the back plate is formed by punching.
  • a liquid crystal display including a display panel and a backlight module
  • the backlight module including: a back plate, including a plurality of concave units arranged in an array; It is disposed on the inner bottom surface of the concave unit.
  • the backlight module further includes: a reflective sheet disposed on an inner side surface of the concave unit.
  • the concave unit is composed of a plurality of side surfaces and a bottom surface, and the opening area of the concave unit is larger than the area of the bottom surface.
  • the bottom surface is a plane or a curved surface
  • the light source is disposed at the center of the bottom surface; or the bottom surface is a bent structure, and the light source is disposed at a bend of the bottom surface.
  • the side is a plane or a curved surface.
  • the number of sides is four, and the bottom surface and the opening are both rectangular.
  • the backlight module further includes: a diffusion plate disposed above the opening of the concave unit; and an optical film disposed on a side of the diffusion plate facing away from the concave unit.
  • the concave unit on the back plate is formed by punching.
  • the backlight module of the present invention comprises a back plate and a light source, wherein the back plate comprises a plurality of concave units arranged in an array; the light source is disposed on the inner bottom surface of the concave unit.
  • the present invention can prevent the light of two adjacent concave units from interfering with each other, realize the area control of the liquid crystal display, and improve the dynamic contrast of the display screen.
  • FIG. 1 is a side view showing the structure of a first embodiment of a backlight module of the present invention
  • FIG. 2 is a top plan view showing the structure of a first embodiment of a backlight module of the present invention
  • FIG. 3 is a side view showing another structure of the first embodiment of the backlight module of the present invention.
  • FIG. 4 is a side view showing the structure of a second embodiment of the backlight module of the present invention.
  • FIG. 5 is a top plan view showing the structure of a second embodiment of the backlight module of the present invention.
  • Fig. 6 is a schematic structural view of an embodiment of a liquid crystal display of the present invention.
  • the backlight module includes a back plate 11 and a light source 12, wherein the back plate 11 includes a plurality of concave units arranged in an array, and the light source 12 is disposed in the concave unit. On the underside of the inside.
  • the back plate 11 may be made of a metal material.
  • aluminum or aluminum alloy is a back plate material with good thermal conductivity; in addition, the back plate 11 may also be made of plastic, and the back plate made of plastic has light weight. , low cost and other characteristics.
  • the backing plate 11 includes a plurality of concave units arranged in an array. It will be understood that the backing plate 11 is a unitary body, and each of the adjacent two concave units is integrally formed.
  • the back plate 11 and the concave unit on the back plate 11 are formed by one stamping, and in other embodiments, may be formed by a reverse molding or the like.
  • the openings of each adjacent two concave units can be smoothly connected to avoid the connection being too sharp and damaging other components.
  • the junction of two adjacent concave units may be arranged in an arc shape as indicated by reference numeral 111 in FIG.
  • the light source 12 is equivalent to being in a cavity structure, and the light emitted by the light source 12 can only be directed to the opening direction of the concave unit. Therefore, the light emitted by the light source 12 in every two adjacent concave units does not interfere with each other.
  • the light source 12 is an LED light bar.
  • FIG. 2 a schematic top view of the structure of the first embodiment of the backlight module of the present invention, wherein the concave units are distributed in a horizontal and vertical array arrangement, and the 3*3 distribution manner of the illustration is only an example, and the specific implementation is
  • the setting can be arbitrarily set according to the brightness, color, and size of the display panel.
  • FIG 3 is a side view showing another structure of a backlight module according to a first embodiment of the present invention, wherein the backlight module further includes a reflection sheet 13 disposed on an inner side surface of the concave unit, and a diffusion plate 14 disposed above the concave unit opening. And an optical film 15 disposed on a side of the diffusing plate facing away from the concave unit.
  • the light source 12 is disposed on the bottom surface of the concave unit, and the reflection sheet 13 is disposed on the inner surface of the concave unit for further reflecting the light emitted by the light source 12, so that the light emitted by the light source 12 in the concave unit can be
  • the display panel area corresponding to the concave unit is irradiated. Increasing the reflection sheet 13 is advantageous for eliminating the light shadow of the light source 12 and improving the light extraction efficiency.
  • the reflective sheet 13 may be replaced by a layer of reflective material coated on the inner side of the concave unit of the backing plate 11.
  • the diffusing plate 14 is a light diffusing plate and has good properties such as heat resistance, dimensional stability, mechanical strength, and flame resistance, and has high light transmittance, excellent shielding property and durability, and the light diffusion effect is optimized. Status for direct backlights.
  • the diffusion plate 14 is configured to refract and scatter the light emitted by the light source 12 and output it.
  • the diffusion plate 14 may be made of polystyrene (PS), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate.
  • PS polystyrene
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinyl chloride
  • PET alcohol ester
  • PMMA acrylic acid
  • MMA acrylic acid
  • the diffusion plate 12 may be a diffusion plate or a combination of multiple diffusion plates for refracting and scattering the light multiple times.
  • the optical film 15 may be a layer or a combination of layers.
  • the optical film 15 acts as an optical refraction, an optical process, or the like on the light, and cooperates with the diffusion plate 14 to make the backlight more uniform.
  • the concave unit is composed of a plurality of side surfaces and a bottom surface, and the opening area of the concave unit is larger than the bottom surface area.
  • the bottom surface of the concave unit is a rectangular plane, and the side surface is a plane of four trapezoids.
  • the light portion emitted from the light source 12 directly enters the diffusion plate 14, and the other portion is reflected by the reflection sheet 13 and enters the diffusion plate 14.
  • the backlight module of the present embodiment includes a back plate and a light source, wherein the back plate includes a plurality of concave units arranged in an array; the light source is disposed on the inner bottom surface of the concave unit.
  • the present invention can prevent the light of two adjacent concave units from interfering with each other, realize the area control of the liquid crystal display, and improve the dynamic contrast of the display screen.
  • a schematic side view of a second embodiment of a backlight module of the present invention includes a backing plate 41 , a light source 42 , a reflective sheet 43 , a diffusing plate 44 , and an optical film 45 .
  • the back plate 41 includes a plurality of concave units arranged in an array, the light source 42 is disposed on the bottom surface of the concave unit, the reflection sheet 43 is disposed on the side surface of the concave unit, and the diffusion plate 44 is disposed above the opening of the concave unit, the optical film 45 is disposed on one side of the diffuser plate facing away from the concave unit.
  • the concave unit is composed of a plurality of side surfaces and a bottom surface, and the opening area of the concave unit is larger than the bottom surface area.
  • the bottom surface of the concave unit is a circular plane, and the side surface is an arc-shaped surrounding surface.
  • the curvature of the curved surface may be set according to the size of the light source 42 and the size of the concave unit to ensure that the light emitted by the light source 42 enters the region corresponding to the concave unit on the diffusion plate 44 to the greatest extent.
  • the bottom surface 411 of the concave unit is a circular plane
  • the side surface 412 of the concave unit extends upwardly from the bottom surface, and the opening is continuously increased during the extension process. And gradually becomes a rectangle from a circle so that two adjacent concave units are connected to each other.
  • the bottom surface of the concave unit may also be a curved surface or a bent structure, and the light source may be disposed at the center of the curved surface or the bent structure.
  • the sides of the concave unit may also be flat or curved.
  • the bottom surface and the side surface of the concave unit are both curved surfaces, they may be combined into a hemispherical structure, that is, the concave unit is a hemispherical structure, and the light source is disposed at the center of the bottom surface of the hemispherical structure.
  • the side surface of the concave unit may also be a reflecting surface formed by combining a plurality of planes.
  • a schematic structural diagram of an embodiment of a liquid crystal display according to the present invention includes a display panel 61 and a backlight module 62 .
  • the display panel 61 includes an array substrate, a color filter substrate, and a liquid crystal layer between the array substrate and the color filter substrate.
  • the backlight module 62 is a backlight module as described in each of the above embodiments.
  • the backlight module 62 includes a back plate, a light source, a reflective sheet, a diffusing plate, and an optical film.
  • the backboard comprises a plurality of concave units arranged in an array, the concave unit is composed of a rectangular bottom surface and four trapezoidal planes, and the side view is trapezoidal.
  • the light source is disposed on the inner bottom surface of the concave unit.
  • the backboard comprises a plurality of array-shaped concave units, the concave unit is composed of a circular bottom surface and an arc-shaped surrounding surface, and the light source is disposed on the inner bottom surface of the concave unit.

Abstract

一种背光模组以及液晶显示器，背光模组包括：背板（11），包括多个阵列分布的凹状单元；光源（12），设置于凹状单元的内底面上。能够增强液晶显示器的区域控光能力，提高了显示画面的动态对比度。

Description

一种背光模组以及液晶显示器
【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以及液晶显示器。
【背景技术】
在传统的TFT-LCD（thin film transistor-liquid crystal display，薄膜晶体管液晶显示器）显示器中，由于TFT-LCD面板本身并不发光，需要借助外加光源才能进行显示，通常这样的光源有背光源和反射式光源两种，由于背光式光源无需受环境变化，所以目前的TFT-LCD显示器中的光源几乎都为背光式光源。
在TFT-LCD背光源中，光源类型经历了从CCFL（Cold Cathode Fluorescent Lamp，冷阴极荧光灯管）到LED（Light Emitting Diode，发光二极管）两种光源。由于LED具有体积小，响应时间快，寿命长，不易碎，色域高，封装体种类多等等优点，目前已成为背光源的主流。LED背光基本可以分为侧入式背光和直下式背光。
其中，直下式背光由于使用光源数目少、无导光板，成本较低，得到了广泛的应用，但是各个光源之间容易相互干扰，使液晶显示器的区域控光能力减弱，降低了液晶显示器的动态对比度。
【发明内容】
本发明主要解决的技术问题是提供一种背光模组以及液晶显示器，能够增强液晶显示器的区域控光能力，提高了显示画面的动态对比度。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，该背光模组包括：背板，包括多个阵列分布的凹状单元；光源，设置于凹状单元的内底面上。
其中，该背光模组还包括：反射片，设置于凹状单元的内侧面。
其中，凹状单元由多个侧面以及一底面包围组成，凹状单元的开口面积大于底面面积。
其中，底面为平面或弧面，光源设置于底面中心；或底面为弯折结构，光源设置于底面的折弯处。
其中，侧面为平面或弧面。
其中，侧面数量为4个，底面和开口均为长方形。
其中，该背光模组还包括：扩散板，设置于凹状单元的开口上方；光学膜片，设置于扩散板的背向凹状单元的一侧。
其中，背板上的凹状单元是通过冲压形成的。
其中，每相邻的两个凹状单元的开口平滑连接。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示器，包括显示面板和背光模组，该背光模组包括：背板，包括多个阵列分布的凹状单元；光源，设置于凹状单元的内底面上。
其中，该背光模组还包括：反射片，设置于凹状单元的内侧面。
其中，凹状单元由多个侧面以及一底面包围组成，凹状单元的开口面积大于底面面积。
其中，底面为平面或弧面，光源设置于底面中心；或底面为弯折结构，光源设置于底面的折弯处。
其中，侧面为平面或弧面。
其中，侧面数量为4个，底面和开口均为长方形。
其中，该背光模组还包括：扩散板，设置于凹状单元的开口上方；光学膜片，设置于扩散板的背向凹状单元的一侧。
其中，背板上的凹状单元是通过冲压形成的。
其中，每相邻的两个凹状单元的开口平滑连接。
本发明的有益效果是：区别于现有技术的情况，本发明的背光模组包括背板和光源，其中，背板包括多个阵列分布的凹状单元；光源设置于凹状单元的内底面上。通过上述方式，本发明能够避免相邻两个凹状单元的光互相干扰，实现了液晶显示器的区域控光，提高了显示画面的动态对比度。
【附图说明】
图1是本发明背光模组第一实施方式的结构侧视示意图；
图2是本发明背光模组第一实施方式的结构俯视示意图；
图3是本发明背光模组第一实施方式的另一结构侧视示意图；
图4是本发明背光模组第二实施方式的结构侧视示意图；
图5是本发明背光模组第二实施方式的结构俯视示意图；
图6是本发明液晶显示器一实施方式的结构示意图。
【具体实施方式】
参阅图1本发明背光模组第一实施方式的结构侧视示意图，该背光模组包括背板11和光源12，其中，背板11包括多个阵列分布的凹状单元，光源12设置于凹状单元内的底面上。
可选的，背板11可以是金属材料制成，例如，铝或者铝合金就是导热性能良好的背板材料；另外，背板11还可以是塑料制成，塑料制成的背板具有重量轻、成本低等特点。
背板11包括多个阵列分布的凹状单元，可以理解的，背板11是一个整体，相邻的每两个凹状单元均是一体成型的。可选的，背板11以及背板11上的凹状单元是通过一次冲压形成的，在其他实施方式中，还可以采用倒模等方式制成。
可选的，由于凹状单元的开口处往往需要安装其他的光学元件，因此，每相邻的两个凹状单元的开口处可以平滑连接，以避免连接处太尖锐而损坏其他元器件。例如，可以将相邻两个凹状单元的连接处设置成弧形，如图1中的标号111处。
可以理解的，由于每个凹状单元的特殊形状，使得光源12相当于处在一个腔体结构里，光源12发出的光只能照向凹状单元的开口方向。因此，每两个相邻的凹状单元里的光源12发出的光是不会互相干扰的。
可选的，光源12为LED灯条。
同时参阅图2，本发明背光模组第一实施方式的结构俯视示意图，其中，凹状单元是以横竖阵列排布的形式分布的，图示的3*3的分布方式仅为示例，在具体实现中，可以根据显示画面的亮度、颜色以及显示面板的大小等任意设置。
参阅图3，本发明背光模组第一实施方式的另一结构侧视示意图，其中，该背光模组还包括设置于凹状单元内侧面的反射片13、设置于凹状单元开口上方的扩散板14以及设置于扩散板的背向凹状单元一侧的光学膜片15。
其中，光源12设置于凹状单元内的底面上，反射片13设置于凹状单元的内侧面上，用于进一步对光源12发出的光进行反射，以使该凹状单元里的光源12发出的光能够照射到与该凹状单元对应的显示面板区域。增加反射片13，有利于消除光源12的灯影，并提高出光效率。
可选的，反射片13还可以由涂覆在背板11凹状单元内侧面的上的一层反射材料来替代。
扩散板14为光扩散板，具有耐热性、尺寸稳定性、机械强度、耐燃性等良好性能，并有高度光线透过率，优良的遮蔽性及耐久性，使其光线扩散效果达到最佳状态，适用于直下式背光源。
具体地，扩散板14用于对光源12发出的光线进行折射和散射后输出。
可选的，扩散板14可以是通过聚苯乙烯（PS）、聚碳酸酯（PC）、聚乙烯（PE）、聚丙烯（PP）、聚氯乙烯（PVC）、聚对苯二甲酸乙二醇酯（PET）、压克力（PMMA）、丙烯酸（MMA）等等透光性聚合材料或合成材料制成的。
可选的，在一实施例中，扩散板12可以是一层扩散板，还可以是多层扩散板的组合，用以对光线进行多次折射和散射。
光学膜片15可以是一层，也可以是多层的组合。光学膜片15对光起到光学折射、光学处理等作用，配合扩散板14，使背光更加均匀。
具体地，在本实施方式中，凹状单元由多个侧面以及一底面包围组成，凹状单元的开口面积大于底面面积。
其中，如图2和图3所示，凹状单元的底面为长方形的平面，侧面为4个梯形的平面。
参见图3中的光路，光源12发出的光部分直接进入扩散板14，另一部分通过反射片13反射后进入扩散板14。
区别于现有技术，本实施方式的背光模组包括背板和光源，其中，背板包括多个阵列分布的凹状单元；光源设置于凹状单元的内底面上。通过上述方式，本发明能够避免相邻两个凹状单元的光互相干扰，实现了液晶显示器的区域控光，提高了显示画面的动态对比度。
参阅图4，本发明背光模组第二实施方式的结构侧视示意图，本实施方式的背光模组包括背板41、光源42、反射片43、扩散板44以及光学膜片45。
其中，背板41包括多个阵列分布的凹状单元，光源42设置于凹状单元内的底面上，反射片43设置于凹状单元内的侧面，扩散板44设置于凹状单元开口的上方，光学膜片45设置于扩散板的背向凹状单元的一侧。
具体地，在本实施方式中，凹状单元由多个侧面以及一底面包围组成，凹状单元的开口面积大于底面面积。凹状单元的底面为圆形的平面，侧面为弧形的包围面。
可选的，弧面的弧度可以根据光源42的大小、凹状单元的大小来设置，以保证光源42发出的光最大程度的进入扩散板44上与凹状单元对应的区域。
可以理解的，参阅图5，本发明背光模组第二实施方式的结构俯视示意图，凹状单元的底面411为圆形平面，凹状单元的侧面412连接底面向上延伸，延伸的过程中开口不断增大，并且由圆形逐渐变成长方形，以便相邻的两个凹状单元互相连接。
另外，在其他实施方式中，凹状单元的底面也可以是弧面或者弯折结构，光源可以设置在弧面或者弯折结构的中心。凹状单元的侧面也可以是平面或者弧面。例如，当凹状单元的底面和侧面均为弧面时，可以组合成半球结构，即凹状单元为一个半球结构，光源设置于半球结构的底面中心。
另外，在其他实施方式中，凹状单元的侧面还可以是多个平面组合形成的反射面。
参阅图6，本发明液晶显示器一实施方式的结构示意图，该液晶显示器包括显示面板61以及背光模组62。
其中，显示面板61包括阵列基板、彩膜基板以及阵列基板和彩膜基板之间的液晶层。
背光模组62是如以上各个实施方式所述的背光模组。
具体地，在一实施方式中，背光模组62包括背板、光源、反射片、扩散板以及光学膜片。
可选的，背板包括多个阵列分布的凹状单元，凹状单元由一个长方形底面和4个梯形的平面组成，其侧视图为梯形。光源设置于该凹状单元的内底面上。
可选的，背板包括多个阵列分布的凹状单元，凹状单元由一个圆形的底面和1个弧形的包围面组成，光源设置于该凹状单元的内底面上。
本实施方式中的背光模组的结构具体可以参考以上各个实施方式，这里不再赘述。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (18)

  1. 一种液晶显示器，包括显示面板和背光模组，其中，所述背光模组包括：
    背板，包括多个阵列分布的凹状单元；
    光源，设置于所述凹状单元的内底面上。
  2. 根据权利要求1所述的液晶显示器，其中，还包括：
    反射片，设置于所述凹状单元的内侧面。
  3. 根据权利要求2所述的液晶显示器，其中，所述凹状单元由多个侧面以及一底面包围组成，所述凹状单元的开口面积大于所述底面面积。
  4. 根据权利要求3所述的液晶显示器，其中，所述底面为平面或弧面，所述光源设置于所述底面中心；或
    所述底面为弯折结构，所述光源设置于所述底面的折弯处。
  5. 根据权利要求3所述的液晶显示器，其中，所述侧面为平面或弧面。
  6. 根据权利要求3所述的液晶显示器，其中，所述侧面数量为4个，所述底面和开口均为长方形。
  7. 根据权利要求1所述的液晶显示器，其中，还包括：
    扩散板，设置于所述凹状单元的开口上方；
    光学膜片，设置于所述扩散板的背向所述凹状单元的一侧。
  8. 根据权利要求1所述的液晶显示器，其中，所述背板上的所述凹状单元是通过冲压形成的。
  9. 根据权利要求1所述的液晶显示器，其中，每相邻的两个所述凹状单元的开口平滑连接。
  10. 一种背光模组，其中，包括：
    背板，包括多个阵列分布的凹状单元；
    光源，设置于所述凹状单元的内底面上。
  11. 根据权利要求10所述的背光模组，其中，还包括：
    反射片，设置于所述凹状单元的内侧面。
  12. 根据权利要求11所述的背光模组，其中，所述凹状单元由多个侧面以及一底面包围组成，所述凹状单元的开口面积大于所述底面面积。
  13. 根据权利要求12所述的背光模组，其中，所述底面为平面或弧面，所述光源设置于所述底面中心；或
    所述底面为弯折结构，所述光源设置于所述底面的折弯处。
  14. 根据权利要求12所述的背光模组，其中，所述侧面为平面或弧面。
  15. 根据权利要求12所述的背光模组，其中，所述侧面数量为4个，所述底面和开口均为长方形。
  16. 根据权利要求10所述的背光模组，其中，还包括：
    扩散板，设置于所述凹状单元的开口上方；
    光学膜片，设置于所述扩散板的背向所述凹状单元的一侧。
  17. 根据权利要求10所述的背光模组，其中，所述背板上的所述凹状单元是通过冲压形成的。
  18. 根据权利要求10所述的背光模组，其中，每相邻的两个所述凹状单元的开口平滑连接。
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