WO2012022076A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2012022076A1
WO2012022076A1 PCT/CN2010/078581 CN2010078581W WO2012022076A1 WO 2012022076 A1 WO2012022076 A1 WO 2012022076A1 CN 2010078581 W CN2010078581 W CN 2010078581W WO 2012022076 A1 WO2012022076 A1 WO 2012022076A1
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WO
WIPO (PCT)
Prior art keywords
group
lamps
light
backlight module
light emitting
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Application number
PCT/CN2010/078581
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English (en)
French (fr)
Inventor
曹谦
林博瑛
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 US12/997,714 priority Critical patent/US8780297B2/en
Publication of WO2012022076A1 publication Critical patent/WO2012022076A1/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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133613—Direct backlight characterized by the sequence of light sources

Definitions

  • the present invention relates to a backlight module, and more particularly to a backlight module for configuring a light emitting diode according to a heat dissipation condition of a position of the light emitting diode and a brightness bin of the light emitting diode.
  • the liquid crystal display is mainly composed of a backlight module and a liquid crystal panel. It has been widely used in the display industry because of its advantages of thinness, low driving voltage and low power consumption compared with other display devices.
  • the types of backlight modules can be mainly divided into light-emitting diode (LED) backlight modules and cold cathode fluorescent tubes (CCFL) backlight modules. Since the LED backlight module has the advantage of low power consumption, replacing the cold cathode fluorescent tube backlight module with the LED backlight module has become the mainstream trend of the backlight module industry.
  • the current LED backlight modules have a plurality of light emitting diodes mounted on a Ughtbar.
  • the finished product of the light-emitting diode is graded according to a predetermined specification, which may be based on the brightness, chromaticity, wavelength or forward voltage of the LED. Since the backlight module is required to provide a uniform backlight, usually only the LEDs classified in a certain main level (bin) are selected to be placed on the light bar. Therefore, the proportion of the number of light-emitting diodes actually used is too low in the total amount of production, and the manufacturing cost of the backlight module is relatively increased.
  • the light-emitting diode strips currently applied to the backlight module are arranged in an equidistant arrangement.
  • the light-emitting diode located at the center of the light strip is bound to be located.
  • the light-emitting diodes at both ends of the light bar are less likely to dissipate heat, and the temperature difference has a great influence on the light-emitting efficiency of the light-emitting diode.
  • the uneven heat distribution phenomenon will affect the backlight module.
  • the uniformity of the overall illumination, and the operating life of the LEDs located at the center of the light bar is also relatively short.
  • a main object of the present invention is to provide a backlight module in which the arrangement of the light emitting diodes is configured according to the heat dissipation conditions of the position of the light emitting diodes and the brightness bin thereof.
  • the present invention provides a backlight module, which is a one-side backlight module for a liquid crystal display device, the liquid crystal display device has a display area, and the display area has a
  • the backlight module includes a light guide plate and a back plate, and the back plate is disposed to overlap with the light guide plate and the display area, and the backlight module further includes:
  • a plurality of light emitting diodes wherein the plurality of light emitting diodes are divided into a plurality of corresponding light groups according to a spacing between adjacent two light emitting diodes, wherein the plurality of light emitting diodes have a position center adjacent to a center line of the display area, adjacent to each other
  • a lamp group having a large spacing between the light emitting diodes is located relatively close to the center of the position and has a higher brightness level; a lamp group having a smaller pitch between adjacent light emitting diodes is located relatively far from the center of the position, and has Lower brightness level.
  • the LED of the backlight module is divided into:
  • a first group of lamps wherein the LEDs of the first group of lamps are disposed at a position relatively close to the center of the position, and a first spacing is maintained between the LEDs of the first group of lamps;
  • a third group of lamps wherein a brightness level of the third group of lamps is lower than a brightness level of the first group of lights, and a light emitting diode of the third group of lamps is disposed at a position relatively far from a center of the position, and Maintaining a third spacing between the LEDs of the third group of lamps, the third spacing being less than the first spacing;
  • a second group of lamps wherein a brightness level of the second group of lights is between a brightness level of the first group of lamps and a third group of lamps, and a light emitting diode of the second group of lamps is disposed in the First light group and place Between the third group of lamps, and maintaining a second spacing between the LEDs of the second group of lamps, the second spacing is between the first spacing and the third spacing.
  • the light guide plate includes a light incident surface; and the plurality of light emitting diodes are light incident surfaces facing the light guide plate.
  • the backlight module further includes a light bar group, the light bar group is disposed on the back plate and faces the light incident surface of the light guide plate, and the light bar group
  • the at least one light bar is symmetrically disposed on the basis of the center of the position, and the plurality of light emitting diodes are disposed on the at least one light bar.
  • the light incident surface of the light guide plate is a planar or sawtooth structural surface.
  • the light incident surface of the light guide plate has a plurality of concave surfaces, and the plurality of concave surfaces respectively correspond to the plurality of light groups, and each of the concave surfaces is spaced apart from the corresponding light group. The distance between the group of lamps having a higher brightness level and the corresponding concave surface is greater than the distance between the group of lamps having a lower brightness level and the corresponding concave surface.
  • the light incident surface of the light guide plate has a plurality of convex surfaces, and the plurality of convex surfaces respectively correspond to the plurality of light groups, and each of the convex surfaces is separated from the corresponding light group
  • the distance between the group of lamps having a higher brightness level and the corresponding convex surface is smaller than the distance between the group of lamps having a lower brightness level and the corresponding convex surface.
  • the light emitting diode is directly disposed on the backplane.
  • the present invention provides another backlight module, which is a backlight module for a liquid crystal display device.
  • the liquid crystal display device has a display area, and the display area has a display area center line.
  • the backlight module includes a backplane, and the backplane is correspondingly overlapped with the display area, and the backlight module includes:
  • the plurality of light emitting diodes are divided into a plurality of corresponding light groups according to a spacing between adjacent two light emitting diodes, wherein the plurality of light emitting diodes have a position center adjacent to a center line of the display area, adjacent to each other
  • the position of the group of lamps having a large spacing between the light emitting diodes is relatively close to the position Centered, and has a higher brightness level; the group of lamps with smaller spacing between adjacent LEDs is relatively far from the center of the position and has a lower brightness level.
  • the plurality of light emitting diodes are disposed on the backplane, and the center of the plurality of light emitting diodes relative to a center line of the display area is substantially at The center of the backboard.
  • the backlight module of the invention not only improves the heat dissipation environment of the light emitting diode by using different arrangement of the light emitting diodes, so that the luminous efficiency of all the light emitting diodes can be consistent, and the brightness of different brightness levels can be improved.
  • the ratio of diodes used is no longer limited to the use of light-emitting diodes of the same brightness level as in the prior art, which helps to reduce the manufacturing cost of the backlight module.
  • FIG. 1A is a schematic view of a first embodiment of a backlight module of the present invention.
  • FIG. 1B is a schematic diagram showing a pitch value corresponding to a light-emitting diode of a plurality of lamp groups of the backlight module of the present invention and a corresponding brightness level.
  • FIG. 2 is a schematic view of a second embodiment of a backlight module of the present invention.
  • FIG 3 is a schematic view of a third embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic view of a fourth embodiment of a backlight module of the present invention.
  • Fig. 5 is a schematic view showing a fifth embodiment of the backlight module of the present invention.
  • FIG. 6 is a schematic view of a sixth embodiment of a backlight module of the present invention.
  • FIG. 7 is a schematic view of a seventh embodiment of a backlight module of the present invention.
  • Figure 8A is a schematic diagram of the prior art for the use of light emitting diodes of different brightness levels.
  • FIG. 8B is a schematic diagram of the use of the light emitting diodes of different brightness levels according to the present invention.
  • FIG. 1A is a schematic diagram of a first embodiment of a backlight module according to the present invention.
  • the backlight module of the first embodiment of the present invention is a one-side backlight module.
  • the backlight module includes a backplane 10, a light guide panel 20, a light bar group 30, and a plurality of light emitting diodes 40, 50, and 60.
  • the backplane 10 overlaps with a display area 12 of a liquid crystal display.
  • the light guide plate 20 and the back plate 10 are arranged to overlap each other and overlap with the display area 12, and the light guide plate 20 includes a light incident surface 201.
  • the light incident surface 201 is a The plane on the side.
  • the display area 12 has a display area center line 14 and a light incident side, and the light incident side is on the same side as the light incident surface 201.
  • the light bar group 30 is located on the light incident side of the display area 12, and may be a light incident surface 201 disposed on the back plate 10 and facing the light guide plate 20.
  • the lamp in this embodiment The strip set 30 consists of a light strip.
  • the plurality of light emitting diodes 40, 50, 60 face the light incident surface 201 of the light guide plate 20, and are disposed on the light bar of the light bar group 30, and have a position center corresponding to the display area center line 14.
  • 30C the light bar of the light bar group 30 is symmetrically arranged based on the position center 30C.
  • the center of the light bar corresponds to the position center 30C.
  • the plurality of LEDs 40, 50, 60 are divided into a plurality of corresponding groups of lamps according to the spacing between the adjacent two LEDs 40, 50, 60, respectively, a first group of lamps G1 and a second group of lamps. G2 and a third lamp group G3, the light-emitting diodes 40, 50, 60 may be white light-emitting diodes, but not limited thereto. As shown in FIG.
  • the light emitting diode 40 of the first lamp group G1 is disposed at a position closest to the position center 30C, wherein the light emitting diode 40 of the first lamp group G1 maintains a a first pitch dl; the light emitting diode 50 of the second lamp group G2 is disposed at a position farther from the position center 30C than the first lamp group G1, wherein the second lamp group G2 A second spacing d2 is maintained between the LEDs 50, and the second spacing d2 is smaller than the first spacing d1; and the LED 60 of the third group G3 is disposed at a position farthest from the center 30C of the position.
  • the LED 50 of the second lamp group G2 is disposed between the first lamp group G1 and the third lamp group G3, wherein the third lamp group G3 maintains a third between the LEDs 60.
  • the pitch d3 is smaller than the first pitch d1 and the second pitch d2, respectively.
  • FIG. 1B shows the spacings dl, d2, and d3 corresponding to the LEDs 40, 50, and 60 of the plurality of lamp groups G1, G2, and G3, and the corresponding brightness levels L1, L2, and L3.
  • the light-emitting diode 40 of the first lamp group G1 belongs to the first brightness level L1, and has the highest brightness, and the first interval dl is also the largest; the light-emitting diode 50 of the second lamp group G2 belongs to the second brightness level L2.
  • the brightness is second highest, and the second interval d2 is large.
  • the light-emitting diode 60 of the third lamp group G3 belongs to the third brightness level L3, and has the lowest brightness and the third distance d3 is the smallest.
  • FIG. 2 is a schematic diagram of a second embodiment of a backlight module according to the present invention.
  • the backlight module of the second embodiment of the present invention is similar to the first embodiment of the present invention, and generally uses the same component name and label, but The difference between the two embodiments is as follows:
  • the light bar group 30 includes two light bars 31 and 32.
  • the two light bars 31 and 32 are symmetrically arranged based on the position center 30C.
  • the position center 30C is located between the two light bars 31, 32.
  • the light emitting diode 40 of the first lamp group G1, the light emitting diode 50 of the second lamp group G2, and the light emitting diode 60 of the third lamp group G3 are arranged in the same manner as the first embodiment.
  • Articles 31, 32 The embodiment shown in Figures 2 and 1A does not limit the number of light bars included in the light bar set 30 of the present invention.
  • FIG. 3 is a schematic diagram of a third embodiment of a backlight module according to the present invention.
  • the backlight module of the third embodiment of the present invention is similar to the first embodiment of the present invention, and generally uses the same component name and label, but The difference between the three embodiments is that the light incident surface 201 of the light guide plate 20 has a plurality of convex surfaces 202.
  • the plurality of convex surfaces 202 respectively correspond to the plurality of lamp groups G1, G2, and G3, and each of the convex surfaces 202 is spaced apart from the corresponding lamp group G1, G2, and G3 by a distance XI.
  • the distance XI is relatively smaller than the distance X2 between the second lamp group G2 having the second lowest brightness level and the corresponding convex surface 202, and the distance X2 is relatively smaller than the third lamp group G3 having the lowest brightness level and the corresponding convex surface thereof.
  • the distance between 202 is X3.
  • FIG. 4 is a schematic diagram of a fourth embodiment of a backlight module according to the present invention.
  • the backlight module of the fourth embodiment of the present invention is similar to the first embodiment of the present invention, and generally uses the same component name and label, but The difference between the four embodiments is that the light incident surface 201 of the light guide plate 20 has a plurality of concave surfaces 203.
  • the plurality of concave surfaces 203 respectively correspond to the plurality of lamp groups G1, G2, G3, and each of the concave surfaces 202 is spaced apart from the corresponding lamp group G1, G2, G3 by a distance Y1, ⁇ 2, ⁇ 3,
  • the distance Y1 between the first lamp group G1 having a higher brightness level and the corresponding concave surface 203 is relatively larger than the distance Y2 between the second lamp group G2 having the second low brightness level and the corresponding concave surface 203
  • the distance Y2 is relatively larger than the distance Y3 between the third lamp group G3 having the lowest brightness level and its corresponding concave surface 203.
  • a backlight module according to a fifth embodiment of the present invention is similar to the first embodiment of the present invention, and substantially uses the same component name and label, but The difference between the five embodiments is that the light incident surface 201 of the light guide plate 20 is a sawtooth structure surface, wherein the distance between the first lamp group G1 having a higher brightness level and the corresponding sawtooth structure is substantially equal to the second time. The distance between the second lamp group G2 of the low brightness level and its corresponding sawtooth structure, and the distance between the third lamp group G3 having the lowest brightness level and its corresponding sawtooth structure.
  • FIG. 6 is a schematic diagram of a sixth embodiment of a backlight module according to the present invention.
  • the backlight module of the sixth embodiment of the present invention is also a one-sided backlight module, which is similar to the first embodiment of the present invention.
  • the same component name and label are used substantially, but the difference between the sixth embodiment is that the backlight module includes only one backplane 10, a light guide panel 20 and a plurality of light emitting diodes 40, 50, 60, wherein the plurality of The light emitting diodes 40, 50, 60 are directly disposed on the back plate 10, and are disposed on the side frame which is vertically bent upward on the side of the back plate 10 to face the light entering the light guide plate 20.
  • FIG. 7 is a schematic diagram of a seventh embodiment of a backlight module according to a seventh embodiment of the present invention.
  • the backlight module of the seventh embodiment of the present invention comprises a backlight module and a plurality of LEDs 40 . , 50, 60.
  • the back panel 10 overlaps with a display area 12 of a liquid crystal display.
  • the display area 12 has a display area center line 14.
  • the plurality of light emitting diodes 40, 50, 60 are disposed on the backboard 10 or the light bar, and the plurality of light emitting diodes 40, 50, 60 have a position center 30C with respect to the center line 14 of the display area.
  • the position center 30C of the plurality of light emitting diodes 40, 50, 60 with respect to the center line 14 of the display area is substantially at the center of the back plate 10.
  • the light-emitting diodes 40, 50, and 60 are also divided into a plurality of corresponding light groups according to the hierarchical manner shown in FIG. 1B.
  • the light emitting diode 40 of the first lamp group G1 is disposed at a position closest to the position center 30C, and a first pitch dl is maintained between the light emitting diodes 40 of the first lamp group G1; the second lamp group G2
  • the light emitting diode 50 is disposed at a position farther from the position center 30C than the first lamp group G1, and maintains a second interval d2 between the light emitting diodes 50 of the second lamp group G2; and the third lamp group G3 emits light.
  • the diode 60 is disposed at a position farthest from the position center 30C, that is, the light emitting diode 50 of the second lamp group G2 is disposed between the first lamp group G1 and the third lamp group G3, and the third A third pitch d3 is maintained between the light emitting diodes 60 of the lamp group G3. Furthermore, the light-emitting diode 40 of the first lamp group G1 belongs to the first brightness level L1, and has the highest brightness, and the first interval d1 is the largest; the light-emitting diode 50 of the second lamp group G2 belongs to the second brightness level L2, The brightness is second highest, and the second interval d2 is large.
  • the light-emitting diode 60 of the third lamp group G3 belongs to the third brightness level L3, and has the lowest brightness and the third distance d3 is the smallest. This embodiment does not particularly limit the number of the light emitting diodes 40, 50, 60.
  • the present invention allows the distance between the light-emitting diodes near the center position Relatively greater than the spacing between the light-emitting diodes away from the central position, the difference in heat dissipation conditions between the near-center position and the light-emitting diode away from the center position is reduced, so that the luminous efficiencies of all the light-emitting diodes tend to be uniform.
  • FIG. 8A and FIG. 8B are schematic diagrams of the prior art and the present invention for the use of light-emitting diodes of different brightness levels.
  • the present invention can effectively improve the utilization rate of the light-emitting diode used when manufacturing the backlight module, and reduce the cost.

Description

背光模组 技术领域
本发明是有关于一种背光模组， 特别是有关于一种根据发光二极管所处 位置的散热条件及发光二极管的亮度级别 (bright bin)来进行发光二极管配置 的背光模组。 龍
液晶显示装置 (liquid crystal display, LCD)主要由背光模组及液晶面板组 成， 比起其它显示装置具有轻薄、 低驱动电压及低功耗等优点， 在显示器产 业里已得到广泛运用。 目前背光模组的种类主要可分为发光二极管 (LED)背 光模组及冷阴极荧光管 (CCFL)背光模组。 由于发光二极管背光模组具有低功 耗的优势， 因此以发光二极管背光模组取代冷阴极荧光管背光模组已是目前 背光模组产业发展的主流趋势。
基于模组化的概念， 目前大部分的发光二极管背光模组将多个发光二极 管装设在一灯条 (Ughtbar)上。 在装设之前， 会以一预定的规格标准对量产的 发光二极管成品进行分级， 其进行分级的依据可以是发光二极管的亮度、 色 度、 波长或正向电压等。 由于背光模组要求能提供均匀的背光源， 通常只有 被分类在某一主要级别 (bin)的发光二极管会被选用设置在灯条上。 因此造成 实际被采用的发光二极管数量占总量产数量的比例过低， 相对提高背光模组 的制造成本。
再者， 目前应用于背光模组的发光二极管灯条， 其发光二极管的排列方 式皆为等间距排列， 当灯条驱动发光时， 位于所述灯条中央位置的发光二极 管势必会比位于所述灯条两端的发光二极管较不易散热， 由于温度差异对发 光二极管的发光效率影响很大， 热分布不均的现象将会影响所述背光模组的 整体发光的均匀程度， 且位于所述灯条中央位置的发光二极管工作寿命也相 对较短。
因此， 有必要提供一种背光模组， 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， 其发光二极管的配置方式是 根据发光二极管所处位置的散热条件及其亮度级别 (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， 为一侧入式的背 光模组， 用于一液晶显示装置， 所述液晶显示装置具有一显示区， 所述显示 区具有一显示区中心线， 所述背光模组包含一导光板及一背板， 所述背板与 所述导光板及所述显示区对应重叠设置， 所述背光模组还包含：
多个发光二极管， 所述多个发光二极管依据相邻两发光二极管之间的间 距大小分成多个对应的灯群， 所述多个发光二极管相对所述显示区中心线具 有一位置中心， 相邻发光二极管之间间距较大的灯群的位置相对接近所述位 置中心， 且具有较高的亮度级别； 相邻发光二极管之间间距较小的灯群的位 置相对远离所述位置中心， 且具有较低的亮度级别。
在本发明的一实施例中， 所述背光模组的发光二极管分成：
一第一灯群， 所述第一灯群的发光二极管是设置在相对接近所述位置中 心的位置， 且所述第一灯群的发光二极管之间维持一第一间距；
一第三灯群， 所述第三灯群的亮度级别低于所述第一灯群的亮度级别， 所述第三灯群的发光二极管是设置在相对远离所述位置中心的位置， 且所述 第三灯群的发光二极管之间维持一第三间距， 所述第三间距小于所述第一间 距； 以及
一第二灯群， 所述第二灯群的亮度级别介于所述第一灯群与所述第三灯 群的亮度级别之间， 所述第二灯群的发光二极管是设置在所述第一灯群与所 述第三灯群之间， 且所述第二灯群的发光二极管之间维持一第二间距， 所述 第二间距大小介于所述第一间距与所述第三间距之间。
在本发明的一实施例中， 所述导光板包含有一入光面； 所述多个发光二 极管是面向所述导光板的入光面。
在本发明的一实施例中， 所述背光模组进一步包含一灯条组， 所述灯条 组设于所述背板上并面对所述导光板的入光面，所述灯条组包含至少一灯条， 所述至少一灯条以所述位置中心为基准而对称设置， 所述多个发光二极管是 设置于所述至少一灯条上。
在本发明的一实施例中， 所述导光板的入光面是平面或锯齿结构面。 在本发明的一实施例中， 所述导光板的入光面具有多个凹面， 所述多个 凹面分别对应所述多个灯群，且每一所述凹面与其所对应的灯群间隔一距离， 其中具有较高亮度级别的灯群与其所对应的凹面之间的距离大于具有较低亮 度级别的灯群与其所对应的凹面之间的距离。
在本发明的一实施例中， 所述导光板的入光面具有多个凸面， 所述多个 凸面分别对应所述多个灯群，且每一所述凸面与其所对应的灯群相隔一距离， 其中具有较高亮度级别的灯群与其所对应的凸面之间的距离小于具有较低亮 度级别的灯群与其所对应的凸面之间的距离。
在本发明的一实施例中， 所述发光二极管是直接设于所述背板上。
再者， 本发明提供另一种背光模组， 为一直下式的背光模组， 用于一液 晶显示装置， 所述液晶显示装置具有一显示区， 所述显示区具有一显示区中 心线， 所述背光模组包含有一背板， 所述背板与所述显示区对应重叠， 所述 背光模组包含：
多个发光二极管， 所述多个发光二极管依据相邻两发光二极管之间的间 距大小分成多个对应的灯群， 所述多个发光二极管相对所述显示区中心线具 有一位置中心， 相邻发光二极管之间间距较大的灯群的位置相对接近所述位 置中心， 且具有较高的亮度级别； 相邻发光二极管之间间距较小的灯群的位 置相对远离所述位置中心， 且具有较低的亮度级别。
在本发明的一实施例中， 所述多个发光二极管是设于所述背板上， 且所 述多个发光二极管相对所述显示区中心线所具有的所述位置中心基本上是处 于所述背板的中心处。
与现有技术相比较， 本发明的背光模组不仅利用不同的发光二极管间距 的安排改善了发光二极管的散热环境， 使所有发光二极管的发光效率可趋于 一致， 还可提高不同亮度级别的发光二极管被采用的比例， 而不再受限于如 现有技术， 必须选用同一亮度级别的发光二极管， 故有助于降低背光模组的 制造成本。 附图说明
图 1 A是本发明背光模组第一实施例的示意图。
图 1B 是本发明背光模组的多个灯群的发光二极管所对应的间距值以及 所对应的亮度级别的示意图。
图 2是本发明背光模组第二实施例的示意图。
图 3是本发明背光模组第三实施例的示意图。
图 4是本发明背光模组第四实施例的示意图。
图 5是本发明背光模组第五实施例的示意图。
图 6是本发明背光模组第六实施例的示意图。
图 7是本发明背光模组第七实施例的示意图。
图 8A是先前技术对不同亮度级别的发光二极管的采用示意图。
图 8B是本发明对不同亮度级别的发光二极管的采用示意图。 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。 再者， 本发明所提到的方向用语， 例 如 「上」、 「下」、 「前」、 「后」、 「左」、 「右」、 「内」、 「外」、 「侧面」 等， 仅是 参考附图的方向。 因此， 使用的方向用语是用以说明及理解本发明， 而非用 以限制本发明。
请参照图 1A所示， 图 1A揭示本发明背光模组第一实施例的示意图， 其 中本发明第一实施例的背光模组为一侧入式的背光模组。 本实施例中， 所述 背光模组包含一背板 10、 一导光板 20、 一灯条组 30及多个发光二极管 40、 50、 60。 所述背板 10与一液晶显示器所具有的一显示区 12对应重叠。 所述 导光板 20与所述背板 10对应重叠设置而同样与所述显示区 12对应重叠，所 述导光板 20包含有一入光面 201， 本实施例中， 所述入光面 201为一侧边的 平面。 所述显示区 12具有一显示区中心线 14及一入光侧边， 所述入光侧边 与所述入光面 201同侧。 所述灯条组 30位于所述显示区 12的入光侧边， 并 可以是设置在所述背板 10上， 且面向所述导光板 20的入光面 201， 本实施 例中所述灯条组 30由一灯条组成。 所述多个发光二极管 40、 50、 60面向所 述导光板 20的入光面 201， 且设置于所述灯条组 30的灯条上， 并对应所述 显示区中心线 14具有一位置中心 30C, 所述灯条组 30的灯条是以所述位置 中心 30C为基准而对称设置， 详细来说， 所述灯条的中心是对应所述位置中 心 30C。 所述多个发光二极管 40、 50、 60并依据相邻两发光二极管 40、 50、 60之间的间距大小分成多个对应的灯群， 分别为一第一灯群 Gl、 一第二灯 群 G2及一第三灯群 G3 , 所述的发光二极管 40、 50、 60可以是白光发光二 极管， 但不在此限。 如图 1A所示， 在本实施例中， 所述第一灯群 G1的发光 二极管 40是设置在最接近位置中心 30C的位置，其中所述第一灯群 G1的发 光二极管 40之间维持一第一间距 dl ; 所述第二灯群 G2的发光二极管 50设 置在相对第一灯群 G1 较远离位置中心 30C的位置， 其中所述第二灯群 G2 的发光二极管 50之间维持一第二间距 d2，所述第二间距 d2小于所述第一间 距 dl ; 而所述第三灯群 G3 的发光二极管 60则设置在最远离位置中心 30C 的位置， 即所述第二灯群 G2的发光二极管 50是设置所述第一灯群 G1及所 述第三灯群 G3之间， 其中所述第三灯群 G3的发光二极管 60之间维持一第 三间距 d3， 所述第三间距 d3分别小于所述第一间距 dl及所述第二间距 d2。
同时参考图 1B所示， 图 1B为所述多个灯群 Gl、 G2、 G3的发光二极管 40、 50、 60所对应的间距 dl、 d2、 d3 以及所对应的亮度级别 Ll、 L2、 L3 的示意图， 其中所述第一灯群 G1的发光二极管 40同属第 1亮度级别 L1 , 其亮度最高， 第一间距 dl也最大； 所述第二灯群 G2的发光二极管 50同属 第 2亮度级别 L2, 其亮度次高， 第二间距 d2次大； 所述第三灯群 G3的发 光二极管 60同属第 3亮度级别 L3 , 其亮度最低， 第三间距 d3最小。
请参考图 2所示， 为本发明背光模组第二实施例的示意图， 本发明第二 实施例的背光模组相似于本发明第一实施例， 并大致沿用相同组件名称及标 号， 但第二实施例的差异特征在于： 本实施例中所述灯条组 30 包含两灯条 31、 32， 所述两灯条 31、 32是以所述位置中心 30C为基准而对称设置， 详 细来说， 所述位置中心 30C是位于所述两灯条 31、 32之间。 所述第一灯群 G1的发光二极管 40、所述第二灯群 G2的发光二极管 50及所述第三灯群 G3 的发光二极管 60以相同于第一实施例的方式排列在所述两灯条 31、 32上。 图 2及图 1A所示的实施例并非限制本发明所述灯条组 30所包含灯条的数量。
请参考图 3所示， 为本发明背光模组第三实施例的示意图， 本发明第三 实施例的背光模组相似于本发明第一实施例， 并大致沿用相同组件名称及标 号，但第三实施例的差异特征在于：所述导光板 20的入光面 201具有多个凸 面 202。 再者， 本实施例中， 所述多个凸面 202分别对应所述多个灯群 Gl、 G2、 G3， 且每一所述凸面 202与其所对应的灯群 Gl、 G2、 G3 间隔一距离 XI、 X2、 X3 , 其中具有较高亮度级别的第一灯群 G1与其所对应的凸面 202 之间的距离 XI相对小于具有次低亮度级别的第二灯群 G2与其所对应的凸面 202之间的距离 X2,同时距离 X2相对小于具有最低亮度级别的第三灯群 G3 与其所对应的凸面 202之间的距离 X3。
请参考图 4所示， 为本发明背光模组第四实施例的示意图， 本发明第四 实施例的背光模组相似于本发明第一实施例， 并大致沿用相同组件名称及标 号，但第四实施例的差异特征在于：所述导光板 20的入光面 201具有多个凹 面 203。 再者， 所述多个凹面 203分别对应所述多个灯群 Gl、 G2、 G3， 且 每一所述凹面 202与其所对应的灯群 Gl、 G2、 G3间隔一距离 Yl、 Υ2、 Υ3， 其中具有较高亮度级别的第一灯群 G1与其所对应的凹面 203之间的距离 Yl 相对大于具有次低亮度级别的第二灯群 G2与其所对应的凹面 203之间的距 离 Y2, 同时距离 Y2相对大于具有最低亮度级别的第三灯群 G3与其所对应 的凹面 203之间的距离 Y3。
请参考图 5所示， 为本发明背光模组第五实施例的示意图， 本发明第五 实施例的背光模组相似于本发明第一实施例， 并大致沿用相同组件名称及标 号，但第五实施例的差异特征在于：所述导光板 20的入光面 201为一锯齿结 构面， 其中具有较高亮度级别的第一灯群 G1 与其所对应的锯齿结构之间的 距离大致等于具有次低亮度级别的第二灯群 G2与其所对应的锯齿结构之间 的距离， 以及大致等于具有最低亮度级别的第三灯群 G3与其所对应的锯齿 结构之间的距离。
请参考图 6所示， 为本发明背光模组第六实施例的示意图， 本发明第六 实施例的背光模组同样为一侧入式的背光模组， 相似于本发明第一实施例， 并大致沿用相同组件名称及标号， 但第六实施例的差异特征在于： 所述背光 模组仅包含一背板 10， 一导光板 20及多个发光二极管 40、 50、 60， 其中所 述多个发光二极管 40、 50、 60是直接设置于所述背板 10上， 且其设置在所 述背板 10 的侧边垂直向上弯折的侧框上， 以面向所述导光板 20 的入光面 201 ο
请参考图 7所示， 为本发明背光模组第七实施例的示意图， 本发明第七 实施例的背光模组为一直下式背光模组，其包含一背板 10及多个发光二极管 40、 50、 60。 所述背板 10与一液晶显示器所具有的一显示区 12对应重叠。 所述显示区 12具有一显示区中心线 14。 所述多个发光二极管 40、 50、 60是 设于所述背板 10或灯条上， 所述多个发光二极管 40、 50、 60相对所述显示 区中心线 14具有一位置中心 30C, 本实施例中， 所述多个发光二极管 40、 50、 60相对所述显示区中心线 14所具有的所述位置中心 30C基本上是处于 背板 10的中心处。
本发明的第七实施例中， 所述发光二极管 40、 50、 60同样依据图 1B所 示的分级方式分成多个对应的灯群， 本实施例中即为一第一灯群 Gl、一第二 灯群 G2及一第三灯群 G3。所述第一灯群 G1的发光二极管 40设置在最接近 位置中心 30C的位置，且所述第一灯群 G1的发光二极管 40之间维持一第一 间距 dl ; 所述第二灯群 G2的发光二极管 50设置在相对第一灯群 G1较远离 位置中心 30C的位置，且所述第二灯群 G2的发光二极管 50之间维持一第二 间距 d2;而所述第三灯群 G3的发光二极管 60则设置在最远离位置中心 30C 的位置， 即所述第二灯群 G2的发光二极管 50是设置所述第一灯群 G1及所 述第三灯群 G3之间， 且所述第三灯群 G3的发光二极管 60之间维持一第三 间距 d3。 再者， 所述第一灯群 G1的发光二极管 40同属第 1亮度级别 L1 , 其亮度最高，第一间距 dl最大；所述第二灯群 G2的发光二极管 50同属第 2 亮度级别 L2, 其亮度次高， 第二间距 d2次大； 所述第三灯群 G3的发光二 极管 60同属第 3亮度级别 L3 , 其亮度最低， 第三间距 d3最小。 本实施例并 未对所述发光二极管 40、 50、 60的数量有特别的限制。
由于接近中心位置的发光二极管相对于远离中心位置的发光二极管来 说， 其散热条件较差， 因此本发明令接近中心位置的发光二极管之间的间距 相对大于远离中心位置的发光二极管之间的间距， 缩小接近中心位置与远离 中心位置的发光二极管的散热条件的差异， 使所有发光二极管的发光效率可 趋于一致。 再者， 请参照图 8A及图 8B所示， 分别是先前技术与本发明对不 同亮度级别的发光二极管的采用示意图。 如图 8A所示， 现有技术仅按照亮 度级别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亮度级别 的发光二极管可用于背光模组。 但如图 8B所示， 本发明根据不同的间距条 件， 即不同的散热条件， 而装设不同亮度级别的发光二极管使整体发光亮度 同样可维持均匀， 则有第 1亮度级别， 第 2亮度级别， 第 3亮度级别的发光 二极管均可用于背光模组， 因此， 本发明能有效地提高制作背光模组时， 所 采用发光二极管的使用率， 降低成本。
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， 为一侧入式的背光模组， 用于一液晶显示装置， 所述液晶 显示装置具有一显示区，所述显示区具有一显示区中心线，所述背光模组 包含一导光板及一背板，所述背板与所述导光板及所述显示区对应重叠设 置， 其特征在于： 所述背光模组还包含多个发光二极管， 所述多个发光二 极管是面向所述导光板的一入光面，所述多个发光二极管相对所述显示区 中心线具有一位置中心，所述多个发光二极管依据相邻两发光二极管之间 的间距大小分成：
一第一灯群，所述第一灯群的发光二极管是设置在相对接近所述位置中心 的位置， 且所述第一灯群的发光二极管之间维持一第一间距；
一第三灯群，所述第三灯群的亮度级别低于所述第一灯群的亮度级别，所 述第三灯群的发光二极管是设置在相对远离所述位置中心的位置，且所述 第三灯群的发光二极管之间维持一第三间距，所述第三间距小于所述第一 间距； 以及
一第二灯群，所述第二灯群的亮度级别介于所述第一灯群与所述第三灯群 的亮度级别之间，所述第二灯群的发光二极管是设置在所述第一灯群与所 述第三灯群之间，且所述第二灯群的发光二极管之间维持一第二间距，所 述第二间距大小介于所述第一间距与所述第三间距之间。
2. 如权利要求 1所述的背光模组，其特征在于：所述背光模组进一步包含一 灯条组，所述灯条组设于所述背板上并面向所述导光板的入光面，所述灯 条组包含至少一灯条， 所述至少一灯条以所述位置中心为基准而对称设 置， 所述多个发光二极管是设置于所述至少一灯条上。
3. 如权利要求 1所述的背光模组，其特征在于：所述导光板的入光面是平面 或锯齿结构面。
4. 如权利要求 1所述的背光模组，其特征在于：所述导光板的入光面具有多 个凹面，所述多个凹面分别对应所述多个灯群，且每一所述凹面与其所对 应的灯群间隔一距离，其中具有较高亮度级别的灯群与其所对应的凹面之 间的距离大于具有较低亮度级别的灯群与其所对应的凹面之间的距离。
5. 如权利要求 1所述的背光模组，其特征在于：所述导光板的入光面具有多 个凸面，所述多个凸面分别对应所述多个灯群，且每一所述凸面与其所对 应的灯群间隔一距离，其中具有较高亮度级别的灯群与其所对应的凸面之 间的距离小于具有较低亮度级别的灯群与其所对应的凸面之间的距离。
6. 如权利要求 1所述的背光模组，其特征在于：所述发光二极管是直接设于 所述背板上。
7. 一种背光模组， 为一侧入式的背光模组， 用于一液晶显示装置， 所述液晶 显示装置具有一显示区，所述显示区具有一显示区中心线，所述背光模组 包含一导光板及一背板，所述背板与所述导光板及所述显示区对应重叠设 置， 其特征在于： 所述背光模组还包含：
多个发光二极管，所述多个发光二极管依据相邻两发光二极管之间的间距 大小分成多个对应的灯群，所述多个发光二极管相对所述显示区中心线具 有一位置中心，相邻发光二极管之间间距较大的灯群的位置相对接近所述 位置中心，且具有较高的亮度级别；相邻发光二极管之间间距较小的灯群 的位置相对远离所述位置中心， 且具有较低的亮度级别。
8. 如权利要求 7所述的背光模组，其特征在于：所述背光模组的发光二极管 分成：
一第一灯群，所述第一灯群的发光二极管是设置在相对接近所述位置中心 的位置， 且所述第一灯群的发光二极管之间维持一第一间距；
一第三灯群，所述第三灯群的亮度级别低于所述第一灯群的亮度级别，所 述第三灯群的发光二极管是设置在相对远离所述位置中心的位置，且所述 第三灯群的发光二极管之间维持一第三间距，所述第三间距小于所述第一 间距； 以及
一第二灯群，所述第二灯群的亮度级别介于所述第一灯群与所述第三灯群 的亮度级别之间，所述第二灯群的发光二极管是设置在所述第一灯群与所 述第三灯群之间，且所述第二灯群的发光二极管之间维持一第二间距，所 述第二间距大小介于所述第一间距与所述第三间距之间。
9. 如权利要求 7所述的背光模组，其特征在于:所述导光板包含有一入光面; 所述多个发光二极管是面向所述导光板的入光面。
10.如权利要求 9所述的背光模组，其特征在于：所述背光模组进一步包含一 灯条组，所述灯条组设于所述背板上并面向所述导光板的入光面，所述灯 条组包含至少一灯条， 所述至少一灯条以所述位置中心为基准而对称设 置， 所述多个发光二极管是设置于所述至少一灯条上。
11.如权利要求 9所述的背光模组，其特征在于：所述导光板的入光面是平面 或锯齿结构面。
12.如权利要求 9所述的背光模组，其特征在于：所述导光板的入光面具有多 个凹面，所述多个凹面分别对应所述多个灯群，且每一所述凹面与其所对 应的灯群间隔一距离，其中具有较高亮度级别的灯群与其所对应的凹面之 间的距离大于具有较低亮度级别的灯群与其所对应的凹面之间的距离。
13.如权利要求 9所述的背光模组，其特征在于：所述导光板的入光面具有多 个凸面，所述多个凸面分别对应所述多个灯群，且每一所述凸面与其所对 应的灯群间隔一距离，其中具有较高亮度级别的灯群与其所对应的凸面之 间的距离小于具有较低亮度级别的灯群与其所对应的凸面之间的距离。
14.如权利要求 9所述的背光模组，其特征在于：所述发光二极管是直接设于 所述背板上。
15.—种背光模组， 为一直下式的背光模组， 用于一液晶显示装置， 所述液晶 显示装置具有一显示区，所述显示区具有一显示区中心线，所述背光模组 包含有一背板， 所述背板与所述显示区对应重叠， 其特征在于： 所述背光 模组包含：
多个发光二极管，所述多个发光二极管依据相邻两发光二极管之间的间距 大小分成多个对应的灯群，所述多个发光二极管相对所述显示区中心线具 有一位置中心，相邻发光二极管之间间距较大的灯群的位置相对接近所述 位置中心，且具有较高的亮度级别；相邻发光二极管之间间距较小的灯群 的位置相对远离所述位置中心， 且具有较低的亮度级别。
如权利要求 15所述的背光模组， 其特征在于： 所述多个发光二极管是设 于所述背板上，且所述多个发光二极管相对所述显示区中心线所具有的所 述位置中心是处于所述背板的中心处。
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