WO2012012959A1 - 一种背光模组 - Google Patents

一种背光模组 Download PDF

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Publication number
WO2012012959A1
WO2012012959A1 PCT/CN2010/076586 CN2010076586W WO2012012959A1 WO 2012012959 A1 WO2012012959 A1 WO 2012012959A1 CN 2010076586 W CN2010076586 W CN 2010076586W WO 2012012959 A1 WO2012012959 A1 WO 2012012959A1
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WO
WIPO (PCT)
Prior art keywords
light
backlight module
brightness level
disposed
center
Prior art date
Application number
PCT/CN2010/076586
Other languages
English (en)
French (fr)
Inventor
曹谦
林博瑛
郭仪正
胡哲彰
Original Assignee
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 US12/996,248 priority Critical patent/US20120057102A1/en
Publication of WO2012012959A1 publication Critical patent/WO2012012959A1/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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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

Definitions

  • the present invention relates to a backlight module, and more particularly to an LED backlight module capable of improving the usage of an LED. Background technique
  • a liquid crystal display is mainly composed of a back light module composed of a backlight, a plastic frame and a diffusion plate, and then assembled with a liquid crystal panel and a front frame.
  • a back light module composed of a backlight, a plastic frame and a diffusion plate, and then assembled with a liquid crystal panel and a front frame.
  • CCFL Cold Cathode Fluorescent Lamp
  • LED light-emitting diode Due to the low power consumption of the LED backlight module, it does not contain mercury.
  • the cold cathode fluorescent lamp backlight module will eventually become a history, and the LED backlight module will inevitably be replaced comprehensively.
  • a display backlight module using a light-emitting diode as a light source has a light-emitting diode disposed on a light bar.
  • the finished LEDs are screened in a predetermined specification to classify the mass-produced LEDs.
  • the performance indicators for classifying the LEDs include: The brightness of the LEDs , chromaticity, wavelength or forward voltage, etc. The LEDs are further classified. Panel manufacturers typically choose LEDs that are classified in a major bin (bin) for placement on the light bar.
  • the uniform display requirement of the backlight of the display is very strict, the above substantially limits the range of the panel manufacturer's choice of the light-emitting diode, and therefore, it will inevitably lead to the proportion of the selected number of light-emitting diodes in the total mass production. too small. As a result, the cost of the backlight module is increased, and the light-emitting diode cannot be fully utilized, thereby reducing the cost.
  • a primary object of the present invention is to provide a backlight module in which the arrangement of the light emitting diodes is configured using a brightness level (BRIGHT BIN) for the light emitting diodes.
  • the present invention provides a backlight module and a liquid crystal display.
  • the backlight module includes a back plate disposed at the bottom of the backlight module.
  • the liquid crystal display device has a display area corresponding to the back plate overlap.
  • the display area center line of the display area; and a plurality of light-emitting diodes, belonging to a plurality of brightness levels, the center line of the display area has a position center with respect to the plurality of light-emitting diodes, and the light-emitting diodes of the higher brightness level are disposed at the center of the relatively close position
  • the position of the light-emitting diode of the lower brightness level is set relatively far from the center of the position.
  • the LED backlight module manufactured by the invention and the liquid crystal display using the LED backlight module of the invention can not only improve the usage rate of the LED used in the liquid crystal display, but are not limited to the prior art. Selecting a group of LEDs of the same level (bin) can effectively improve the illumination of the liquid crystal display and the LED backlight module; Use rate to reduce costs.
  • Figure 3 is a third embodiment of the present invention.
  • Figure 5 is a fifth embodiment of the present invention.
  • Figure 6 is a sixth embodiment of the present invention.
  • Figure 7 is a seventh embodiment of the present invention
  • 8 is a schematic diagram of an LED backlight module according to an eighth embodiment of the present invention
  • FIG. 9 is a schematic diagram of an LED backlight module according to a ninth embodiment of the present invention.
  • Fig. 10 is a schematic view showing the use of the light-emitting diode of the present invention. detailed description
  • FIG. 1 is a schematic diagram of an LED backlight module according to a first embodiment of the present invention.
  • the first embodiment of the present invention is a side-lit LED backlight module for use in a liquid crystal display.
  • the brightness of the first brightness level is the highest, and the brightness of the fourth brightness level is the lowest.
  • the light emitting diode 40 belongs to the first brightness level.
  • the light emitting diode 50 belongs to the second brightness level.
  • the light-emitting diode 60 belongs to the third brightness level.
  • the light-emitting diode of the fourth brightness level is the darkest and is not used.
  • the light-emitting diode 40 is set to the first group, the light-emitting diode 50 is set to the second group, and the light-emitting diode 60 is set to the third group.
  • the LED backlight module includes a back plate 10, a light guide plate 20, a light bar 30 and a plurality of light emitting diodes 40-60.
  • the back plate 10 is disposed at the bottom of the LED backlight module.
  • the light guide plate 20 is disposed on the back plate 10 and overlaps with a display area 12 of the liquid crystal display.
  • the display area 12 has a display area center line (AA line center line) 14.
  • the backing plate 10 has a light entrance side that is perpendicular to the centerline 14 of the display area.
  • the light entrance side has a position center 30C.
  • the light bar 30 is disposed on the back plate 10, the light incident side of the LED backlight module, and faces a light incident surface 20-1 of the light guide plate 20.
  • a plurality of light emitting diodes each having a different brightness level are disposed on the light bar 30.
  • the light incident surface 20-1 of the light guide plate 20 is a flat surface.
  • the light-emitting diode 40 (the first group) belonging to the highest brightness level is disposed at the position closest to the position center 30C
  • the light-emitting diode 60 (the third group) belonging to the lowest brightness level is disposed at the farthest from the position center 30C.
  • Position, and LED 50 Group 2 is set at The light emitting diode 40 (the first group) and the light emitting diode 60 (the third group).
  • FIG. 2 it is a schematic diagram of an LED backlight module according to a second embodiment of the present invention.
  • This embodiment is a side-in LED backlight module.
  • the brightness of the first brightness level is the highest, and the brightness of the fourth brightness level is the lowest.
  • the light emitting diode 40 belongs to the first brightness level.
  • the light emitting diode 50 belongs to the second brightness level.
  • the light emitting diode 60 belongs to the third brightness level.
  • the darkest diode of the 4th brightness level is not used.
  • the light-emitting diode 40 is set to the first group, the light-emitting diode 50 is set to the second group, and the light-emitting diode 60 is set to the third group.
  • the LED backlight module comprises a backplane 10, a light guide panel 20, a light bar 30-1, a light bar 30-2 and a plurality of light emitting diodes 40, 50, 60.
  • the back plate 10 is disposed at the bottom of the backlight module of the light emitting diode.
  • the light guide plate 20 is disposed on the back plate 10 and overlaps with a display area 12 of the liquid crystal display.
  • the display area 12 has a display area center line (AA area center line) 14.
  • the backing plate 10 has a light entrance side that is perpendicular to the centerline 14 of the display area. The entrance side has a center of position 30C.
  • the light bar 30-1 and the light bar 30-2 are disposed on the back plate 10, and a light-emitting side of the LED backlight module is disposed on a light-incident surface 12-1 of the light guide plate 20.
  • the light bar 30-1 and the light bar 30-2 are symmetrically disposed on the back plate 10 and the light incident side of the LED backlight module, which is based on the position center 30C.
  • a plurality of light emitting diodes 40, 50, 60 are respectively disposed on the light bar 30-1, the light bar 30-2, and face a light incident surface 20-1 of the light guide plate 20.
  • the light incident surface 20-1 of the light guide plate 20 is a flat surface.
  • the highest level of the light-emitting diode 40 (the first group) is disposed on the light bar 30-1, and the light bar 30-2 is closest to the position center 30C, which is the lowest level light-emitting diode 60 (third The group is disposed at the position of the light bar 30-1, the light bar 30-2, which is farthest from the position center 30C.
  • FIG. 3 it is a schematic diagram of an LED backlight module according to a third embodiment of the present invention.
  • This embodiment is a one-side LED backlight module.
  • the brightness of the first brightness level is the highest, and the brightness of the fourth brightness level is the lowest.
  • the light emitting diode 40 belongs to the first brightness level.
  • led 50 belongs to the second brightness level.
  • the light emitting diode 60 belongs to the third brightness level.
  • the light-emitting diode of the fourth brightness level is the darkest and is not used.
  • the light-emitting diode 40 is set to the first group, the light-emitting diode 50 is set to the second group, and the light-emitting diode 60 is set to the third group.
  • the LED backlight module comprises a back plate 10, a light guide plate 20, four light bars 30-1, 30-2, 30-3 and 30-4 and a plurality of light emitting diodes 40, 50. 60.
  • the back plate 10 is disposed at the bottom of the LED backlight module.
  • the light guide plate 20 is disposed on the back plate 10 and overlaps with a display area 12 of the liquid crystal display.
  • the display area 12 has a display area center line (AA area center line) 14.
  • the backing plate 10 has a light entrance side that is perpendicular to the centerline 14 of the display area.
  • the entrance side has a position center 30C.
  • the light bars 30-1, 30-2, 30-3 and 30-4 are symmetrically arranged on the light incident side of the back panel 10 and the LED backlight module, which is based on the position center 30C.
  • a plurality of light emitting diodes 40, 50, 60 are disposed on the light bars 30-1, 30-2, 30-3 and 30-4, respectively, and face the light incident surface 20-1 of the light guide plate 20.
  • the light incident surface 20-1 of the light guide plate 20 is a flat surface.
  • the light bar 30-2, 30-3 is close to the center of the position 30C, and the light bar 30-1, 30-4 is far from the center 30C of the position.
  • the light-emitting diode 40 (Group 1) is disposed at the position closest to the center 30C of the position on the light bars 30-2, 30-3.
  • the light emitting diode 50 (Group 2) is disposed at a position farther from the center 30C of the light bar 30-2, 30-3.
  • the light-emitting diode 60 (Group 3) is placed at the farthest position from the center
  • FIG. 4 to FIG. 6 are schematic diagrams of the LED backlight module of the fourth, fifth and sixth embodiments of the present invention, respectively.
  • the fourth, fifth, and sixth embodiments of the present invention are mainly similar to the LED backlight module of the third embodiment.
  • the difference is that, as shown in Fig. 4, the light incident surface 20-2 of the fourth embodiment having the light guide plates 20 facing the light bars 30-1, 30-2, 30-3 and 30-4 has a plurality of concave surfaces.
  • the light incident surface 20-3 of the light guide plate 20 facing the light bars 30-1, 30-2, 30-3 and 30-4 of the fifth embodiment has a plurality of convex surfaces.
  • the light incident surface 20-4 of the light guide plate 20 facing the light bars 30-1, 30-2, 30-3 and 30-4 of the sixth embodiment is a sawtooth structural surface.
  • the liquid crystal display has a display area center line 14.
  • Figure 7 Shown is a schematic diagram of grading a plurality of light emitting diodes according to a brightness level of a light emitting diode (BRIGHT BIN).
  • the plurality of light-emitting diodes are screened into four levels, a light-emitting diode 40 of a first brightness level, a light-emitting diode 50 of a second brightness level, a light-emitting diode 60 of a third brightness level, and a light-emitting diode of a fourth brightness stage.
  • the brightness of the first brightness level is the highest, and the brightness of the fourth brightness level is the lowest.
  • the light-emitting diode of the fourth brightness level is not used at the darkest.
  • the light-emitting diode 40 (the first group) belonging to the first brightness level is disposed on the back plate near the center line 14 of the display area.
  • the light-emitting diodes 50 (second group) belonging to the second brightness level are disposed at a position far from the center line 14 of the display area.
  • the light-emitting diodes 60 (Group 3) belonging to the third brightness level are disposed at the position of the back plate which is farthest from the center line 14 of the display area, that is, the other side edges of the light-incident side which are close to the display area 12 position.
  • any of the liquid crystal displays of any of the above-described first to seventh embodiments may be employed.
  • FIG. 8 is a schematic diagram of an LED backlight module according to an eighth embodiment of the present invention
  • the LED backlight module includes a backplane 10 and a plurality of LEDs 40-60.
  • a plurality of light bars 30-5 are disposed on the back plate 10.
  • the LED of the 4th brightness level (B4) is not used.
  • the LED of the first brightness level (B1) is placed on the light bar at the center position 14-1.
  • the LEDs belonging to the 2nd brightness level (B2) are placed on the center bar 14-1, down, left, and right bars.
  • the light-emitting diode of the third brightness level (B3) is placed on the upper right, lower right, upper left, and lower left light bars at the center position 14-1.
  • this embodiment does not specifically limit the number of light bars 30-5.
  • FIG. 9 is a schematic diagram of an LED backlight module according to a ninth embodiment of the present invention.
  • This embodiment is a direct-lit LED backlight module.
  • the plurality of light emitting diodes are screened into four levels, a first brightness level (B1), a second brightness level (B2), a third brightness (B3), and a fourth brightness level (B4).
  • the LED backlight module includes a back plate 10 and a plurality of light emitting diodes.
  • the LED backlight module of the ninth embodiment of the present invention does not have There is a light bar, and a plurality of light emitting diodes can be directly disposed on the back plate 10.
  • the light-emitting diode of the first brightness (B1) is set at the center position 14-1.
  • the light-emitting diode belonging to the second brightness level (B2) is disposed in the upper, lower, left, and right directions of the center position 14-1.
  • the light-emitting diode belonging to the third brightness level (B3) is disposed at the upper right, lower right, upper left, and lower left directions of the center position 14-1. Note, however, that this embodiment does not specifically limit the number of light-emitting diodes B1, B2, B3, B4 and the position on the backplane 10.
  • FIG. 10 is a schematic diagram showing the improvement of the usage rate of the light emitting diode of the present invention.
  • the prior art classifies the light-emitting diodes to be disposed on the backlight module according to the brightness level (BRIGHT BIN), and only the light-emitting diodes of the third brightness level can be used for the backlight module.
  • the light-emitting diodes having the first brightness level, the second brightness level, and the third brightness level can be used for the backlight module.
  • a light-emitting diode of a higher brightness level is disposed at a position closer to the center of the position, and a position is set at a position farther from the center of the position.
  • Light-emitting diodes with lower brightness levels may be a white light-emitting diode or a light-emitting diode of other colors.
  • the usage rate of the light-emitting diode used in the manufacture of the liquid crystal display and the LED backlight module can be effectively improved, the cost is reduced, and the brightness of the light-emitting diode and the unevenness of the color are also improved, thereby further surrounding the center and the position of the liquid crystal display.
  • the brightness of the LEDs is more uniform.

Description

一种背光模组
技术领域
本发明是有关于一种背光模组， 特别是有关于一种可提高发光二极管使 用率的发光二极管背光模组。 背景技术
现今， 液晶显示器 (Liquid Crystal Display, LCD)主要由背光源、 胶框及 扩散板等构成的背光模组 (back light module)先行制作后， 再与液晶面板及前 框组装而构成的液晶模组成为一商品。 以往液晶显示器的背光光源多采用的 冷阴极荧光灯 (Cold Cathode Fluorescent Lamp, CCFL)背光模组正在迅速地被 发光二极管 (LED)背光模组所取代。 由于发光二极管背光模组的低功耗， 不 含汞的特性。 必然地， 冷阴极荧光灯背光模组终将成为历史， 而发光二极管 背光模组必然将全面性地取而代之。
目前， 采用发光二极管作为光源的显示器背光模组， 均将发光二极管设 置在灯条 (Lightbar)上。 而对于将设置在灯条上的发光二极管， 会以一预定的 规格对发光二极管成品进行筛选用以对量产的发光二极管进行分类， 通常对 发光二极管进行分类的性能指标包括： 发光二极管的亮度、 色度、 波长或正 向电压等。 进而将发光二极管进行分级。 面板生产商通常会选择被分类在在 某一主要级别 (bin)中的发光二极管， 用于设置在灯条上。 另一方面， 由于显 示器的背光均匀显示要求非常严格， 以上实质上是限缩了面板生产商可选择 发光二极管的范围， 因此， 必然会导致被选使用的发光二极管数量占量产总 量的比例过小。 如此， 则会导致背光模组的成本提高， 且无法充分利用发光 二极管， 降低成本。
因此， 有必要提供一种发光二极管背光模组及其发光二极管配置方法， 以解决现有技术所存在的问题。 发明内容
本发明的主要目的在于提供一种背光模组， 其发光二极管配置方法是利 用针对发光二极管的亮度级别 (BRIGHT BIN)而进行配置。
为达成本发明的前述目的， 本发明提供一种背光模组以及液晶显示器， 背光模组包含一背板， 设置在背光模组的底部； 液晶显示装置具有与背板重 叠对应的显示区， 显示区具有的一显示区中心线； 以及多个发光二极管， 分 属多个亮度级别， 显示区中心线相对多个发光二极管具有一位置中心， 属较 高亮度级别的发光二极管设置在相对接近位置中心的位置， 属较低亮度级别 的发光二极管设置在相对远离位置中心的位置。
依据本发明所制作的发光二极管背光模组以及采用本发明发光二极管背 光模组的液晶显示器，不仅可提高液晶显示器需采用的发光二极管的使用率， 而不再受限于如现有技术， 必须选用同一级别 (bin)的一组发光二极管， 能有 效地提高制作液晶显示器及发光二极管背光模组时， 所采用发光二;
Figure imgf000004_0001
用率， 降低成本。 附图说明
图 1是本发明第一 ；施例发光二; 背光模组的:
图 2是本发明第二 ；施例发光二; 背光模组的:
图 3是本发明第三 ；施例发光二; 背光模组的:
图 4是本发明第四 ；施例发光二; 背光模组的:
图 5是本发明第五 ；施例发光二; 背光模组的:
图 6是本发明第六 ；施例发光二; 背光模组的:
图 7是本发明第七 ；施例发光二; 背光模组的: 图 8是本发明第八实施例发光二极管背光模组的示意图;
图 9是本发明第九实施例发光二极管背光模组的示意图;
图 10是显示本发明提高发光二极管使用率的示意图。 具体实施方式
为让本发明上述目的、 特征及优点更明显易懂， 下文特举本发明较佳实 施例， 并配合附图， 作详细说明如下：
请参照图 1所示， 图 1是本发明第一实施例发光二极管背光模组的示意 图， 其中本发明第一实施例是显示应用于液晶显示器中的侧入式发光二极管 背光模组。如图 1中右侧所示，为多个发光二极管依据亮度级别 (BRIGHT BIN) 进行分级的示意图。 第 1亮度级的亮度最高， 第 4亮度级的亮度最低。 发光 二极管 40属于第 1亮度级。 发光二极管 50属于第 2亮度级。 发光二极管 60 属于第 3亮度级。 第 4亮度级的发光二极管最暗则不采用。 其中发光二极管 40设定为第 1群， 发光二极管 50设定为第 2群， 发光二极管 60设定为第 3 群。
在本实施例中， 发光二极管背光模组包含一背板 10， 一导光板 20， 一灯 条 30及多个发光二极管 40-60。 背板 10设置在发光二极管背光模组的底部。 导光板 20设置在背板 10上， 与液晶显示器所具有的一显示区 12重叠对应。 显示区 12具有一显示区中心线 (AA区中心线） 14。背板 10具有与显示区中心 线 14垂直的一入光侧边。 入光侧边具有一位置中心 30C。 灯条 30设置在背 板 10上，发光二极管背光模组的入光侧边，且面向导光板 20的一入光面 20-1。 多个分别具有不同亮度级别的发光二极管设置在灯条 30上。 导光板 20的入 光面 20-1为一平面。 在本实施例中， 属最高亮度级别的发光二极管 40(第 1 群)设置在最接近位置中心 30C的位置， 属最低亮度级别的发光二极管 60(第 3群)设置在最远离位置中心 30C的位置， 而发光二极管 50(第 2群)则设置在 发光二极管 40(第 1群)与发光二极管 60(第 3群)之间。
请参照图 2所示， 是本发明第二实施例发光二极管背光模组的示意图， 本实施例是一侧入式发光二极管背光模组。 如图 2中右侧所示， 为多个发光 二极管依据亮度级别 (BRIGHT BIN)进行分级的示意图。第 1亮度级的亮度最 高， 第 4亮度级的亮度最低。 发光二极管 40属于第 1亮度级。 发光二极管 50属于第 2亮度级。 发光二极管 60属于第 3亮度级。 第 4亮度级的发光二 极管最暗则不采用。 其中发光二极管 40设定为第 1群， 发光二极管 50设定 为第 2群， 发光二极管 60设定为第 3群。
本发明此实施例中， 发光二极管背光模组包含一背板 10， 一导光板 20， 一灯条 30-1， 一灯条 30-2及多个发光二极管 40、 50、 60。 背板 10设置在发 光二极管背光模组的底部。 导光板 20设置在背板 10上， 与液晶显示器所具 有的一显示区 12重叠对应。显示区 12具有一显示区中心线 (AA区中心线） 14。 背板 10具有与显示区中心线 14垂直的一入光侧边。 入光侧边具有一位置中 心 30C。 灯条 30-1与灯条 30-2设置在背板 10上， 发光二极管背光模组的一 入光侧边， 且面向导光板 20的一入光面 12-1。 灯条 30-1与灯条 30-2以位置 中心 30C为准而对称设置在背板 10上， 发光二极管背光模组的入光侧边。 多个发光二极管 40， 50， 60分别设置在灯条 30-1， 灯条 30-2上， 面向导光 板 20的一入光面 20-1。此导光板 20的入光面 20-1为一平面。在本实施例中， 属最高级别的发光二极管 40(第 1群)设置在灯条 30-1，灯条 30-2上最接近位 置中心 30C的位置， 属最低级别的发光二极管 60(第 3群)设置在灯条 30-1， 灯条 30-2上最远离位置中心 30C的位置。
请参照图 3所示， 是本发明第三实施例发光二极管背光模组的示意图， 本实施例是一侧入式发光二极管背光模组。 如图 3中右侧所示， 为多个发光 二极管依据亮度级别 (BRIGHT BIN)进行分级的示意图。第 1亮度级的亮度最 高， 第 4亮度级的亮度最低。 发光二极管 40属于第 1亮度级。 发光二极管 50属于第 2亮度级。 发光二极管 60属于第 3亮度级。 第 4亮度级的发光二 极管最暗则不采用。 其中发光二极管 40设定为第 1群， 发光二极管 50设定 为第 2群， 发光二极管 60设定为第 3群。
本发明此实施例中， 发光二极管背光模组包含一背板 10， 一导光板 20， 四个灯条 30-1， 30-2, 30-3及 30-4及多个发光二极管 40、 50、 60。 背板 10 设置在发光二极管背光模组的底部。 导光板 20设置在背板 10上， 与液晶显 示器所具有的一显示区 12重叠对应。 显示区 12具有一显示区中心线 (AA区 中心线 )14。 背板 10具有与显示区中心线 14垂直的一入光侧边。入光侧边具 有一位置中心 30C。灯条 30-1， 30-2, 30-3及 30-4以位置中心 30C为准而对 称设置在背板 10，发光二极管背光模组的入光侧边。多个发光二极管 40， 50， 60分别设置在灯条 30-1， 30-2, 30-3及 30-4上， 且面向导光板 20的入光面 20-1。导光板 20的入光面 20-1为一平面。灯条 30-2， 30-3接近位置中心 30C, 灯条 30-1， 30-4距离位置中心 30C较远。 发光二极管 40(第 1群)设置在灯条 30-2, 30-3上最接近位置中心 30C的位置。 发光二极管 50(第 2群)设置在灯 条 30-2， 30-3离位置中心 30C较远的位置。 发光二极管 60(第 3群)设置在距 离位置中心 30C最远的位置。
请参照图 4至图 6所示， 图 4至图 6分别是本发明第四、 第五、 第六实 施例发光二极管背光模组的示意图。 本发明第四， 第五， 第六实施例发光二 极管背光模组主要大部分与第三实施例的发光二极管背光模组相似。 不同的 是， 如图 4所示， 第四实施例所具有面向灯条 30-1， 30-2， 30-3及 30-4的导 光板 20的入光面 20-2具有多个凹面。 如图 5所示， 第五实施例所具有面向 灯条 30-1， 30-2 , 30-3及 30-4的导光板 20的入光面 20-3具有多个凸面。 如 图 6所示， 第六实施例所具有面向灯条 30-1， 30-2， 30-3及 30-4的导光板 20的入光面 20-4是为一锯齿结构面。
请参照图 7所示，。 液晶显示器具有一显示区中心线 14。 如图 7中右侧 所示，为多个发光二极管依据发光二极管亮度级别 (BRIGHT BIN)进行分级的 示意图。 将多个发光二极管筛选为四个级别， 第 1亮度级的发光二极管 40， 第 2亮度级的发光二极管 50， 第 3亮度级的发光二极管 60及第 4亮度级的 发光二极管。第 1亮度级的亮度最高， 第 4亮度级的亮度最低。如图 7所示， 第 4亮度级的发光二极管最暗不采用。 属第 1亮度级的发光二极管 40(第 1 群)即设置在显示区中心线 14 附近的背板上。 属第 2 亮度级的发光二极管 50(第 2群)设置在离显示区中心线 14相对远些的背板位置上。属第 3亮度级 的发光二极管 60(第 3群)则设置载离显示区中心线 14最远的背板位置上，即 已接近与显示区 12垂直的入光侧边的另外两侧边的位置。
并且， 任何种类的液晶显示器， 均可采用前述第一实施例 ~第七实施例 中之任一发光二极管背光模组。
请参阅图 8， 是本发明第八实施例发光二极管背光模组的示意图， 本发 明也能应用于直下式发光二极管背光模组。 发光二极管背光模组包含一背板 10及多个发光二极管 40-60。 多个灯条 30-5是设置在背板 10上。 如图 8所 示， 第 4亮度级 (B4) 的发光二极管不采用。 属第 1亮度级 (B1)的发光二极管 即设置位在中心位置 14-1 的灯条上。 属第 2亮度级 (B2) 的发光二极管设置 位在中心位置 14-1上， 下， 左， 右的灯条上。 属第 3亮度级 (B3) 的发光二 极管则设置位在中心位置 14-1右上， 右下， 左上， 左下的灯条上。但请注意， 本实施例并未对灯条 30-5数量有特别的限制。
请参照图 9所示， 是本发明第九实施例发光二极管背光模组的示意图， 本实施例是直下式发光二极管背光模组。 如图 9右侧所示， 为多个发光二极 管依据正向电压级别 (Vf BIN)进行分级的示意图。 将多个发光二极管筛选为 四个级别，第 1亮度级 (B1)，第 2亮度级 (B2)，第 3亮度 (B3)及第 4亮度级 (B4)。 发光二极管背光模组包含背板 10及多个发光二极管。与本发明第八实施例发 光二极管背光模组不同的是， 本发明第九实施例的发光二极管背光模组不具 有灯条， 而可将多个发光二极管直接设置在背板 10上。 如图 9所示， 属第 1 亮度 (B1)的发光二极管即设置位在中心位置 14-1。属第 2亮度级 (B2) 的发光 二极管设置在中心位置 14-1 的上、 下、 左、 右方向。 属第 3亮度级 (B3) 的 发光二极管则设置在中心位置 14-1右上， 右下， 左上， 左下的方向。 但请注 意， 本实施例并未对发光二极管 Bl， B2， B3， B4的数量及在背板 10上的 位置有特别的限制。
请参照图 10， 是显示本发明提高发光二极管使用率的示意图。 如图 10 中 (a)现有技术按照亮度级别 (BRIGHT BIN)对将要设置在背光模组上的发光 二极管进行分级， 仅有第 3亮度级的发光二极管可用于背光模组。 但在图 8 中 (b)中， 若依据本发明， 则有第 1亮度级， 第 2亮度级， 第 3亮度级的发光 二极管均可用于背光模组。 并且， 依据本发明第一实施例~第九实施例的发 光二极管背光模组， 在较接近位置中心的位置， 设置属较高亮度级别的发光 二极管， 在较远离位置中心的位置， 则设置属较低亮度级别的发光二极管。 并且， 本发明的发光二极管可以采用白色发光二极管， 或混合采用其它颜色 的发光二极管均可。 因此， 能有效地提高制作液晶显示器及发光二极管背光 模组时， 所采用发光二极管的使用率， 降低成本， 同时也改善发光二极管亮 度， 色度不均匀问题， 进而使液晶显示器中心与位处周边的发光二极管的亮 度， 色度更趋均匀。
本发明已由上述相关实施例加以描述， 然而上述实施例仅为实施本发明 的范例。 必需指出的是， 已公开的实施例并未限制本发明的范围。 相反地， 包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围 内。

Claims

权 利 要 求
1 .一种背光模组，用于液晶显示装置，其特征在于：所述背光模组包含: 一背板， 设置在所述背光模组的底部；
所述液晶显示装置具有与所述背板重叠对应的显示区， 所述显示区具有 的一显示区中心线； 以及
多个发光二极管， 分属多个亮度级别， 所述显示区中心线相对所述多个 发光二极管具有一位置中心， 属较高亮度级别的发光二极管设置在相对接近 所述位置中心的位置， 属较低亮度级别的发光二极管设置在相对远离所述位 置中心的位置。
2. 如权利要求 1所述的背光模组， 其特征在于： 所述背光模组是直下式 发光二极管的背光模组。
3. 如权利要求 2所述的背光模组， 其特征在于： 还包含多个灯条， 设置 在所述背板上， 所述多个发光二极管是设置在所述多个灯条上。
4. 如权利要求 3所述的背光模组， 其特征在于： 所述显示区中心线相对 所述多个发光二极管具有的所述位置中心实质上是处于背板的中心处。
5. 如权利要求 4所述的背光模组， 其特征在于： 所述多个灯条灯条以所 述位置中心为基准而对称设置， 依据所述多个亮度级别， 将所述多个发光二 极管分成多个对应的灯群， 属较高亮度级别的灯群设置在相对接近所述位置 中心的灯条上， 属较低亮度级别的灯群设置在相对远离所述位置中心的灯条 上， 介于较高亮度级别与较低亮度级别之间的灯群则设置在具有较高亮度级 别的灯群与具有较低亮度级别的灯群之间。
6. 如权利要求 2所述的背光模组， 其特征在于： 所述多个发光二极管是 直接设置在所述背板上。
7. 如权利要求 1所述的背光模组， 其特征在于： 所述管背光模组是侧入 式发光二极管的背光模组，所述侧入式发光二极管的背光模组还包含导光板， 所述导光板与所述背板及所述显示区重叠地对应设置。
8. 如权利要求 7所述的背光模组， 其特征在于： 还包含至少一灯条对应 所述导光板设置在与所述显示区中心线垂直的一侧边， 所述多个发光二极管 是设置在所述至少一灯条上。
9. 如权利要求 8所述的背光模组， 其特征在于： 所述至少一灯条以所述 位置中心为基准而对称设置， 依据所述多个亮度级别， 将所述多个发光二极 管分成多个对应的灯群， 属较高亮度级别的灯群设置在相对接近所述位置中 心的灯条上，属较低亮度级别的灯群设置在相对远离所述位置中心的灯条上， 介于较高亮度级别与较低亮度级别之间的灯群则设置在具有较高亮度级别的 灯群与具有较低亮度级别的灯群之间。
10. 如权利要求 9所述的背光模组， 其特征在于： 所述多个对应的灯群 分别是由具有相同亮度级别的发光二极管组成。
11 . 如权利要求 7所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面是平面或锯齿结构面。
12. 如权利要求 8所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面是平面或锯齿结构面。
13. 如权利要求 9所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面是平面或锯齿结构面。
14. 如权利要求 10所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面是平面或锯齿结构面。
15. 如权利要求 7所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面具有多个凹面或多个凸面。
16. 如权利要求 8所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面具有多个凹面或多个凸面。
17. 如权利要求 9所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面具有多个凹面或多个凸面。
18. 如权利要求 10所述的背光模组， 其特征在于： 所述导光板面对所述 至少一灯条的入光面具有多个凹面或多个凸面。
19. 如权利要求 2所述的背光模组， 其特征在于： 所述多个发光二极管 是白光发光二极管。
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