WO2014110836A1 - 光导入系统、侧入式背光模组及液晶显示器 - Google Patents

光导入系统、侧入式背光模组及液晶显示器 Download PDF

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Publication number
WO2014110836A1
WO2014110836A1 PCT/CN2013/070802 CN2013070802W WO2014110836A1 WO 2014110836 A1 WO2014110836 A1 WO 2014110836A1 CN 2013070802 W CN2013070802 W CN 2013070802W WO 2014110836 A1 WO2014110836 A1 WO 2014110836A1
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WIPO (PCT)
Prior art keywords
light
fluorescent film
disposed
backlight module
emitting
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PCT/CN2013/070802
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English (en)
French (fr)
Inventor
胡哲彰
贺虎
Original Assignee
深圳市华星光电技术有限公司
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Priority to US13/818,796 priority Critical patent/US9025109B2/en
Publication of WO2014110836A1 publication Critical patent/WO2014110836A1/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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • 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
    • G02F1/133618—Illuminating devices for ambient light

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a light introduction system, a side-lit backlight module, and a liquid crystal display.
  • the original light source described herein refers to a light source that emits light by itself, such as an LED, using an energy source such as electric power.
  • LEDs are widely used as backlight sources in backlight modules because of their energy-saving advantages.
  • the power consumption of the backlight source in the backlight module needs to be further reduced. This requires reducing the number of LEDs used to reduce the power consumption of the backlight source, or using a new energy-saving light source.
  • the backlight source in the backlight module can achieve further energy saving.
  • the use of ambient light as a backlight source in a backlight module is a new energy-saving solution that eliminates the need to use an original source that is powered by electricity, or reduces the proportion of the original source used, thus greatly reducing energy consumption.
  • the light-introducing system 1 includes an ambient light collecting system 10 and a plurality of optical fibers 20, wherein each of the optical fibers 20 has a light-emitting end 21 and an light-injecting end 22, and the light-injecting ends 22 of the respective optical fibers are gathered into a bundle. Adjacent to the ambient light collecting system 10, the light exiting ends 21 of the respective optical fibers are arranged adjacent to the light incident side 31 of the light guide plate 30.
  • the ambient light CL absorbed by the ambient light collecting system is transmitted into the optical fiber 20 through the light incident end 22 to be transmitted to the light exiting end 21, and the light emitted from the light emitting end 21 enters the light guiding plate 30 through the light incident side surface 31.
  • the light-emitting end 21 of the optical fiber 20 has a small illumination angle (usually less than 60 degrees)
  • the difference in brightness between the front end of the light-emitting end 21 and the light-emitting end 21 ie, the left and right sides of the light-emitting end 21
  • the phenomenon of dark and clear, in severe cases, can distinguish the position of each light end 21, which seriously affects the optical taste of the backlight module.
  • the ambient light CL contains a certain amount of short-wave light (wavelength range is about 200 nm to 400 nm)
  • some polymer materials may occur under long-time irradiation of short-wave light.
  • Photochemical reaction, in the backlight module many components are made of polymer materials, so it is very sensitive to short-wave light, such as long-term exposure to short-wave light, the function of many components will be greatly affected and longevity reduce.
  • an object of the present invention is to provide a light introduction system including: an ambient light collecting system that faces and absorbs ambient light; a plurality of light guiding devices, each of which has an input The light emitting end and the light emitting end are adjacent to a light incident side of the light guide plate, the light incident end is adjacent to the ambient light collecting system, and the absorbed ambient light enters the light incident end and conducts To the light-emitting end; a fluorescent film disposed between the light-emitting end and the light-incident side.
  • Another object of the present invention is to provide a side-in type backlight module, including a back plate, a light guide plate and an optical film.
  • the light guide plate includes a light incident side surface and a bottom surface connected to the light incident side surface. And the top surface, the back plate is disposed under the bottom surface, and the optical film is disposed on the top surface, wherein the edge-lit backlight module further includes a light introduction system, and the light is introduced
  • the system includes: an ambient light collecting system, facing and absorbing ambient light; a plurality of light guiding devices, each light guiding device having an light incident end and an light exit end, the light exit end being adjacent to the light incident side, the light entering The ambient light is adjacent to the ambient light collecting system, and the absorbed ambient light enters the light incident end and is transmitted to the light exiting end; and a fluorescent film is disposed between the light emitting end and the light incident side.
  • Another object of the present invention is to provide a liquid crystal display including a display panel, a back plate, a light guide plate and an optical film, the light guide plate including a light incident side surface and a bottom surface connected to the light incident side surface and opposite a top surface, the backing plate is disposed under the bottom surface, the optical film is disposed on the top surface, and the display panel is disposed on the optical film, wherein the liquid crystal display further
  • the light-introducing system includes: an ambient light collecting system that faces and absorbs ambient light; and a plurality of light guiding devices, each of the light guiding devices has an light-input end and an light-emitting end, and the light-emitting end is adjacent to the light-emitting end a light incident side, the light incident end is adjacent to the ambient light collecting system, and the absorbed ambient light enters the light incident end and is transmitted to the light emitting end; a fluorescent film is disposed at the light emitting end and Between the light incident sides.
  • a cover body is further disposed, the cover body covers the light-emitting end, and the fluorescent film is disposed on an inner wall or an outer surface of the cover body; or, the cover body is one, and the cover body covers the The light-emitting ends of the plurality of light guiding devices are disposed on the inner wall or the outer surface of the cover body.
  • the fluorescent film is disposed on the light incident side surface; or the fluorescent film is disposed on the light emitting surface On the light-emitting surface of the end.
  • a fluorescent film may be disposed on the light-incident side surface and the light-emitting surface of the light-emitting end. Further, the fluorescent film absorbs light having a wavelength in the range of 200 nm to 400 nm.
  • the light guiding device is an optical fiber.
  • the light introduction system diffuses the light beam emitted from the light-emitting end by providing a fluorescent film between the light-emitting end of the optical fiber and the light-incident side of the light guide plate.
  • the phenomenon of uneven brightness and darkness of the light beam emitted from the light exiting end on the light incident side is improved, the optical taste of the side-entry backlight module is improved, and the fluorescent film can
  • the short-wavelength light of 200nm ⁇ 400nm is converted into visible light, which reduces the proportion of short-wave light entering the side-entry backlight module, and increases the proportion of visible light entering the side-entry backlight module, avoiding the side-entry backlight module.
  • the components are exposed to short-wave light, which increases the life of the components and thus increases the life of the liquid crystal display.
  • FIG. 1 is a schematic view of a conventional light introduction system.
  • Fig. 2 is a schematic view showing a light introducing system of Embodiment 1 of the present invention.
  • Fig. 3 is an enlarged schematic view showing a region B in Fig. 1.
  • Fig. 4 is a schematic view showing the arrangement of a fluorescent film of Example 2 of the present invention.
  • Fig. 5a and Fig. 5b are schematic views showing the arrangement of a fluorescent film of Example 3 of the present invention.
  • Fig. 6a and Fig. 6b are schematic views showing the arrangement of a fluorescent film of Example 4 of the present invention.
  • FIG. 7 is a schematic diagram of a side-entry backlight module according to an embodiment of the invention.
  • a light introduction system 1 includes an ambient light collection system 10, a plurality of optical fibers 20, and a fluorescent film. 40.
  • the ambient light collecting system 10 faces and absorbs the ambient light CL. It is noted that the ambient light CL can be light emitted by sunlight, light, or other illuminating objects.
  • Each of the optical fibers 20 has a light-emitting end 21 and an light-incident end 22, and the light-incident end 22 of each of the optical fibers converges into a bundle and is adjacent to the ambient light collecting system 10, and the light-emitting ends 21 of the respective optical fibers are arranged adjacent to the light guide plate 30.
  • the light-emitting surface 211 of each light-emitting end 21 is covered with a fluorescent film 40.
  • the absorbed ambient light CL is transmitted into the optical fiber 20 through the light-injecting end 22 to the light-emitting end 21, and the light emitted from the light-emitting end 21 passes through the fluorescent film 40 and then enters the light-guide plate 30 through the light-incident side 31; wherein, the optical fiber 20 is a An excellent light guiding device, the energy loss of light in the optical fiber 20 is very low.
  • the absorbed ambient light CL includes visible light and a certain amount of short-wave light (wavelength range of about 200 nm to 400 nm)
  • the short-wave light directly damages the component made of the polymer material in the backlight module, and the fluorescence
  • the film 40 converts short-wave light into visible light, reducing the short-wave light component while increasing the composition of visible light.
  • the composition of the fluorescent film 40 may be a phosphor in which the three primary color phosphors are mixed in a certain ratio, and the three primary color phosphors may be red phosphorium-activated cerium oxide (Y 2 0 3: Eu:> , green phosphorium bismuth, strontium activated aluminate (MgAluO ⁇ Ce/Tb), blue phosphorium strontium activated magnesium strontium aluminate (BaMg 2 Al 16 0 27 :Eu), but not limited to this.
  • red phosphorium-activated cerium oxide Y 2 0 3: Eu:>
  • green phosphorium bismuth strontium activated aluminate
  • BaMg 2 Al 16 0 27 :Eu blue phosphorium strontium activated magnesium strontium aluminate
  • the fluorescent film 40 of the present embodiment contains a plurality of scattering particles, which have the function of scattering light, and can diffuse the light beam emitted from the light-emitting surface 211, assuming that the light-emitting surface 211 of the light-emitting end 21 does not cover the fluorescent film 40, The two light rays 212 and 213 which are arbitrarily taken out from the light-emitting surface 211 will be propagated along the broken line.
  • the fluorescent film 40 is contained.
  • the scattering particles diffuse the light beam passing through the fluorescent film 40, that is, the light rays 212, 213 are diffused and diffused and propagated along the solid line, thereby causing the light beam emitted from the light exiting surface 211 to be diffused.
  • Embodiment 2 Referring to FIG. 4, Embodiment 2 and implementation Example 1 does not Similarly, the fluorescent film 40 can also be disposed on the light incident side surface 31 of the light guide plate 30.
  • the scattering particles contained in the fluorescent film 40 diffuse the light beam passing through the fluorescent film 40, that is, the light rays 212 and 213 are scattered and diffused. The line propagates, and the light beam emitted from the light-emitting surface 211 is diffused.
  • a cover 90 may be disposed at a position relative to each of the light-emitting ends 21, the cover 90 including an inner wall 91 facing the light-emitting end 21 and an outer surface 92 facing away from the light-emitting end 21, and the fluorescent film 40 may be disposed on The inner wall 91 is disposed on the outer surface 92, and the scattering particles contained in the fluorescent film 40 diffuse the light beam passing through the fluorescent film 40, that is, the light rays 212, 213 are diffused and diffused and propagate along the solid line, thereby causing the light-emitting surface 211 to be emitted. The beam is diffused.
  • the shape of the cover 90 is not limited to the circular shape shown in the drawing, and may be, for example, an elliptical shape, a square shape, or the like.
  • Embodiment 4 Referring to FIG. 6a and FIG. 6b, for example, a light-emitting end 21 of a plurality of optical fibers 20 may be entirely covered by a cover 90.
  • the fluorescent film 40 may be disposed on the inner wall 91 or on the outer surface 92, and the fluorescent film 40
  • the scattering particles contained therein diffuse the light beam that has passed through the fluorescent film 40, that is, the light rays 212, 213 are diffused and diffused and propagated along a solid line, thereby causing the light beam emitted from the light-emitting surface 211 to be diffused.
  • the shape of the cover 90 is not limited to the square shape shown in the drawing, and may be, for example, elliptical, circular, or the like.
  • the light introduction system of the above-described embodiment of the present invention is generally applied to a side-entry backlight module of a liquid crystal display.
  • the side-lit backlight module 2 includes a back plate 50 , a light guide plate 30 , an optical film 60 , and a light introduction system according to an embodiment of the present invention.
  • the light guide plate 30 includes a light incident side surface 31 and is connected to the light incident side surface 31 .
  • the back plate 50 is disposed under the bottom surface 32, and the optical film 60 is disposed on the top surface 33.
  • the light emitted by the light introduction system of the embodiment passes through the light incident side surface 31 and enters the light guide plate.
  • the display panel 80 is disposed on the side-lit backlight module 2 to form a complete liquid crystal display 3 , and the side-lit backlight module 2 provides light to the display panel 80 , so that the display panel 80 displays images.
  • the light introduction system emits the light-emitting end by providing a fluorescent film between the light-emitting end of the optical fiber and the light-incident side of the light guide plate.
  • the light beam is diffused, which improves the phenomenon of uneven brightness and darkness of the light beam emitted from the light exiting end on the light incident side surface, improves the optical taste of the side-entry backlight module, and because the fluorescent film can It can convert short-wavelength light with wavelength from 200nm to 400nm into visible light, which reduces the proportion of short-wave light entering the side-entry backlight module, and increases the proportion of visible light entering the side-entry backlight module, avoiding side-entry
  • the components in the backlight module are exposed to short-wave light, which improves the life of the components and further increases the service life of the liquid crystal display.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种光导入系统（1）、侧入式背光模组（2）及液晶显示器（3），光导入系统（1）包括：环境光收集系统（10），朝向并且吸收环境光（CL）；若干导光装置，每一导光装置具有一入光端（22）及一出光端（21），出光端（21）邻近于导光板（30）的一入光侧面（31），入光端（22）邻近于环境光收集系统（10），被吸收的环境光（CL）进入入光端（22）并传导至出光端（21）；荧光膜（40），设置于出光端（21）与入光侧面（31）之间。荧光膜（40）使得出光端（21）射出的光束得到扩散，改善了出光端（21）射出的光束在入光侧面（31）上产生的亮暗不均的现象，提高了侧入式背光模组（2）的光学品味，并且由于荧光膜（40）能够将波长为200nm〜400nm的短波光转换为可见光，避免了侧入式背光模组（2）中的部件受到短波光的照射，提高了部件的寿命，进而提高了液晶显示器（3）的使用寿命。

Description

说 明 书 光导入系统、 侧入式背光模组及液晶显示器 技术领域
本发明涉及液晶显示技术领域， 具体地讲， 是涉及一种光导入系统、 侧入 式背光模组及液晶显示器。
背景技术
现今， 在液晶显示器（LCD, Liquid Crystal Display) 的背光模组中大多数 采用原始光源作为背光光源， 这里所述的原始光源是指利用电力等能源来使自 身发光的光源， 例如 LED。 LED具有高效节能的优点， 因此被广泛利用为背 光模组中的背光光源。 但随着人们更加注重节能环保， 现今背光模组中的背光 光源的功耗需要进一歩地降低， 这就需要减少 LED使用的数量来实现背光光 源功耗的降低， 或者使用新型的节能光源作为背光模组中的背光光源， 来达到 进一歩节能。 例如利用环境光作为背光模组中的背光光源是一种新型的节能方案， 无需 使用以电力为动力的原始光源， 或者将原始光源的使用比例减小， 这样就可以 大幅度地减少能耗。 目前比较可行的办法是将环境光收集后使用多条光纤传导 并由各条光纤的出光端将收集的环境光出射到背光模组中作为背光模组的背 光光源， 而且可以调整光纤的数量进而调整背光光源的数量。 参照图 1， 光导 入系统 1包括环境光收集系统 10、 若干条光纤 20， 其中， 每条光纤 20具有一 出光端 21及一入光端 22，各条光纤的入光端 22汇聚成一束后邻近于环境光收 集系统 10， 各条光纤的出光端 21邻近排列于导光板 30的入光侧面 31。
被环境光收集系统吸收的环境光 CL通过入光端 22进入光纤 20中传导至 出光端 21， 从出光端 21射出的光通过入光侧面 31进入导光板 30中。 然而， 由于光纤 20的出光端 21 的发光角度较小 （通常小于 60度）， 导致出光端 21 正前方与出光端 21之间 （即出光端 21左右两边） 的亮度差异过大， 从而产生 亮暗分明的现象， 严重时可以分辨出每一出光端 21所在的位置， 严重影响了 背光模组的光学品味。 此外， 由于环境光 CL中含有一定量的短波光 （波长范 围大约为 200nm〜400nm)， 一些高分子材料在短波光的长时间照射下， 会发生 光化学反应， 而在背光模组中， 许多部件都是由高分子材料制成的， 因此对短 波光十分敏感， 如长时间被短波光照射， 该许多部件的功能会受到较大的影响 并且寿命降低。 发明内容 为了解决上述现有技术存在的问题， 本发明的目的在于提供一种光导入系 统， 包括： 环境光收集系统， 朝向并且吸收环境光； 若干导光装置， 每一导光 装置具有一入光端及一出光端， 所述出光端邻近于导光板的一入光侧面， 所述 入光端邻近于所述环境光收集系统， 被吸收的所述环境光进入所述入光端并传 导至所述出光端； 荧光膜， 设置于所述出光端与所述入光侧面之间。 本发明的另一目的还在于提供一种侧入式背光模组， 包括背板、 导光板及 光学膜片， 所述导光板包括一入光侧面、 与所述入光侧面相连并相对的底面及 顶面， 所述背板设于所述底面之下， 所述光学膜片设于所述顶面之上， 其中， 所述侧入式背光模组还包括光导入系统， 所述光导入系统包括： 环境光收集系 统， 朝向并且吸收环境光； 若干导光装置， 每一导光装置具有一入光端及一出 光端， 所述出光端邻近于所述入光侧面， 所述入光端邻近于所述环境光收集系 统， 被吸收的所述环境光进入所述入光端并传导至所述出光端； 荧光膜， 设置 于所述出光端与所述入光侧面之间。 本发明的另一目的还在于提供一种液晶显示器， 包括显示面板、 背板、 导 光板及光学膜片， 所述导光板包括一入光侧面、 与所述入光侧面相连并相对的 底面及顶面， 所述背板设于所述底面之下， 所述光学膜片设于所述顶面之上， 所述显示面板设于所述光学膜片之上， 其中， 所述液晶显示器还包括光导入系 统， 所述光导入系统包括： 环境光收集系统， 朝向并且吸收环境光； 若干导光 装置， 每一导光装置具有一入光端及一出光端， 所述出光端邻近于所述入光侧 面， 所述入光端邻近于所述环境光收集系统， 被吸收的所述环境光进入所述入 光端并传导至所述出光端； 荧光膜， 设置于所述出光端与所述入光侧面之间。 此外， 还包括若干罩体， 所述罩体罩住所述出光端， 所述荧光膜设于所述 罩体的内壁上或外表面上； 或者， 罩体为一个， 所述罩体罩住所述若干导光装 置的出光端， 所述荧光膜设于所述罩体的内壁上或外表面上。 此外， 所述荧光膜设于所述入光侧面上； 或者， 所述荧光膜设于所述出光 端的出光表面上。 此外， 还可以将荧光膜设于所述入光侧面上及所述出光端的出光表面上。 此外， 所述荧光膜吸收波长范围为 200nm〜400nm的光。 此外， 所述导光装置为光纤。
根据本发明的光导入系统、 侧入式背光模组及液晶显示器， 该光导入系统 通过在光纤的出光端与导光板的入光侧面之间设置荧光膜， 使得出光端射出的 光束得到扩散， 改善了该出光端射出的光束在该入光侧面上产生的亮暗不均的 现象， 提高了该侧入式背光模组的光学品味， 并且由于该荧光膜能够将波长为
200nm〜400nm 的短波光转换为可见光， 减少了进入侧入式背光模组中的短波 光的比例， 同时增加了进入侧入式背光模组的可见光的比例， 避免了侧入式背 光模组中的部件受到短波光的照射， 提高了部件的寿命， 进而提高了液晶显示 器的使用寿命。
附图说明 图 1是现有的一种光导入系统的示意图。 图 2是本发明实施例 1的光导入系统的示意图。 图 3是图 1中的 B区域放大示意图。 图 4是本发明实施例 2的荧光膜的设置示意图。 图 5a和图 5b是本发明实施例 3的荧光膜的设置示意图。 图 6a和图 6b是本发明实施例 4的荧光膜的设置示意图。 图 7是本发明实施例的侧入式背光模组的示意图。
图 8是本发明实施例的液晶显示器的示意图。 具体实施方式 为了更好地阐述本发明所采取的技术手段及其效果， 以下结合本发明的实 施例及其附图进行详细描述， 其中， 相同的标号始终表示相同的部件。 实施例 1 参照图 2， 光导入系统 1包括环境光收集系统 10、若干条光纤 20、 荧光膜 40。 环境光收集系统 10朝向并且吸收环境光 CL， 值得注意的是， 环境光 CL 可为太阳光、 灯光、 或其他发光物体发出的光。 每条光纤 20具有一出光端 21 及一入光端 22，各条光纤的入光端 22汇聚成一束后邻近于环境光收集系统 10， 各条光纤的出光端 21邻近排列于导光板 30的入光侧面 31， 需要说明的是， 出 光端 21的数量及排列方式并不以图 2中所示为限， 而是根据实际情况来确定 出光端 21的数量及排列方式。每个出光端 21的出光表面 211上覆盖有荧光膜 40。 被吸收的环境光 CL通过入光端 22进入光纤 20中传导至出光端 21，从出 光端 21射出的光经过荧光膜 40后通过入光侧面 31进入导光板 30中； 其中， 光纤 20是一种优良的导光装置， 光在光纤 20中的能量损失非常低。 由于被吸 收的环境光 CL 中包括可见光及一定量的短波光 （波长范围大约为 200nm-400nm)的成分， 该短波光会直接地损害背光模组中由高分子材料制成 的部件， 而荧光膜 40可将短波光转化为可见光， 减少了短波光成分， 同时又 增加了可见光的成分。 在本实施例中， 荧光膜 40的成分可为三基色荧光粉按一定比例混合后的 荧光粉， 该三基色荧光粉可为红色荧光粉铕激活的氧化钇 (Y203:Eu:>， 绿色荧光 粉铈、 铽激活的铝酸盐 (MgAluO^Ce/Tb) , 蓝色荧光粉铕激活的铝酸钡镁 (BaMg2Al16027:Eu), 但不限于此。 参照图 3，本实施例的荧光膜 40中含有若干散射粒子，该散射粒子具有散 射光的作用， 可以将出光表面 211射出的光束进行扩散， 假设出光端 21 的出 光表面 211没有覆盖荧光膜 40，则从出光表面 211射出的光束中任意取的两条 光线 212、 213将沿虚线进行传播， 而在本实施例中， 由于出光端 21的出光表 面 211设有覆盖荧光膜 40，荧光膜 40中含有的散射粒子将通过荧光膜 40的光 束扩散， 即使得光线 212、 213得到散射扩散并沿实线进行传播， 进而使得出 光表面 211射出的光束得到扩散。 实施例 2 参照图 4， 实施例 2与实施例 1不同的是， 荧光膜 40也可设于导光板 30 的入光侧面 31上， 荧光膜 40中含有的散射粒子将通过荧光膜 40的光束扩散， 即使得光线 212、 213得到散射扩散并沿实线进行传播，进而使得出光表面 211 射出的光束得到扩散。 实施例 3 参照图 5a及图 5b， 荧光膜 40也存在着其他的设置。例如， 可在相对于每 个出光端 21的位置处设有罩体 90， 该罩体 90包括有面向出光端 21的内壁 91 及背向出光端 21 的外表面 92， 荧光膜 40可设于内壁 91上或设于外表面 92 上，荧光膜 40中含有的散射粒子将通过荧光膜 40的光束扩散，即使得光线 212、 213得到散射扩散并沿实线进行传播， 进而使得出光表面 211射出的光束得到 扩散。 当然， 在本实施例中， 罩体 90的形状并不以图中所示的圆形为限， 例 如也可以椭圆形、 方形等。 实施例 4 参照图 6a及图 6b， 例如也可用一个罩体 90将若干条光纤 20的出光端 21 全部罩住， 荧光膜 40可设于内壁 91上或设于外表面 92上， 荧光膜 40中含有 的散射粒子将通过荧光膜 40的光束扩散， 即使得光线 212、 213得到散射扩散 并沿实线进行传播， 进而使得出光表面 211射出的光束得到扩散。 当然， 在本 实施例中， 罩体 90的形状并不以图中所示的方形为限， 例如也可以椭圆形、 圆形等。 本发明上述实施例的光导入系统通常应用于液晶显示器的侧入式背光模 组中， 以下将对使用了上述本实施例的光导入系统的侧入式背光模组及液晶显 示器进行说明。 参照图 7， 侧入式背光模组 2包括背板 50、 导光板 30、 光学膜片 60及本 发明实施例的光导入系统， 导光板 30包括一入光侧面 31、与入光侧面 31相连 并相对的底面 32及顶面 33，背板 50设于底面 32的下方，光学膜片 60置于顶 面 33之上， 本实施例的光导入系统射出的光通过入光侧面 31进入导光板 30 中混合均匀， 而后混合均匀的光从顶面 33射出。 参照图 8，显示面板 80设于侧入式背光模组 2之上形成完整的液晶显示器 3， 则侧入式背光模组 2提供光给显示面板 80， 使得显示面板 80显示影像。 综上所述， 根据本发明的光导入系统、 侧入式背光模组及液晶显示器， 该 光导入系统通过在光纤的出光端与导光板的入光侧面之间设置荧光膜， 使得出 光端射出的光束得到扩散， 改善了该出光端射出的光束在该入光侧面上产生的 亮暗不均的现象， 提高了该侧入式背光模组的光学品味， 并且由于该荧光膜能 够将波长为 200nm〜400nm的短波光转换为可见光， 减少了进入侧入式背光模 组中的短波光的比例， 同时增加了进入侧入式背光模组的可见光的比例， 避免 了侧入式背光模组中的部件受到短波光的照射， 提高了部件的寿命， 进而提高 了液晶显示器的使用寿命。
虽然本发明是参照其示例性的实施例被具体描述和显示的， 但是本领域的 普通技术人员应该理解， 在不脱离由权利要求限定的本发明的精神和范围的情 况下， 可以对其进行形式和细节的各种改变。

Claims

权利要求书
1、 一种光导入系统， 其中， 包括： 环境光收集系统， 朝向并且吸收环境光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述出光端邻近 于导光板的一入光侧面， 所述入光端邻近于所述环境光收集系统， 被吸收的所 述环境光进入所述入光端并传导至所述出光端； 荧光膜， 设置于所述出光端与所述入光侧面之间。
2、 根据权利要求 1所述的光导入系统， 其中， 还包括若干罩体， 所述罩 体罩住所述出光端， 所述荧光膜设于所述罩体的内壁上。
3、 根据权利要求 1所述的光导入系统， 其中， 还包括一罩体， 所述罩体 罩住所述若干导光装置的出光端， 所述荧光膜设于所述罩体的内壁上。
4、 根据权利要求 1所述的光导入系统， 其中， 所述荧光膜设于所述入光 侧面上。
5、 根据权利要求 1所述的光导入系统， 其中， 所述荧光膜设于所述出光 端的出光表面上。
6、 根据权利要求 1所述的光导入系统， 其中， 所述荧光膜设于所述入光 侧面上及所述出光端的出光表面上。
7、 一种侧入式背光模组， 包括背板、 导光板及光学膜片， 所述导光板包 括一入光侧面、 与所述入光侧面相连并相对的底面及顶面， 所述背板设于所述 底面之下， 所述光学膜片设于所述顶面之上， 其中， 所述侧入式背光模组还包 括光导入系统， 所述光导入系统包括： 环境光收集系统， 朝向并且吸收环境光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述出光端邻近 于所述入光侧面， 所述入光端邻近于所述环境光收集系统， 被吸收的所述环境 光进入所述入光端并传导至所述出光端； 荧光膜， 设置于所述出光端与所述入光侧面之间。
8、 根据权利要求 7所述的侧入式背光模组， 其中， 所述光导入系统还包 括若干罩体， 所述罩体罩住所述出光端， 所述荧光膜设于所述罩体的内壁上。
9、 根据权利要求 7所述的侧入式背光模组， 其中， 所述光导入系统还包 括一罩体， 所述罩体罩住所述若干导光装置的出光端， 所述荧光膜设于所述罩 体的内壁上。
10、 根据权利要求 7所述的侧入式背光模组， 其中， 所述荧光膜设于所述 入光侧面上。
11、 根据权利要求 7所述的侧入式背光模组， 其中， 所述荧光膜设于所述 出光端的出光表面上。
12、 根据权利要求 7所述的侧入式背光模组， 其中， 所述荧光膜设于所述 入光侧面上及所述出光端的出光表面上。
13、 一种液晶显示器， 包括显示面板、 背板、 导光板及光学膜片， 所述导 光板包括一入光侧面、 与所述入光侧面相连并相对的底面及顶面， 所述背板设 于所述底面之下， 所述光学膜片设于所述顶面之上， 所述显示面板设于所述光 学膜片之上，其中，所述液晶显示器还包括光导入系统，所述光导入系统包括: 环境光收集系统， 朝向并且吸收环境光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述出光端邻近 于所述入光侧面， 所述入光端邻近于所述环境光收集系统， 被吸收的所述环境 光进入所述入光端并传导至所述出光端； 荧光膜， 设置于所述出光端与所述入光侧面之间。
14、 根据权利要求 13所述的液晶显示器， 其中， 所述光导入系统还包括 若干罩体， 所述罩体罩住所述出光端， 所述荧光膜设于所述罩体的内壁上。
15、 根据权利要求 13所述的液晶显示器， 其中， 所述光导入系统还包括 一罩体， 所述罩体罩住所述若干导光装置的出光端， 所述荧光膜设于所述罩体 的内壁上。
16、 根据权利要求 13所述的液晶显示器， 其中， 所述荧光膜设于所述入 光侧面上。
17、 根据权利要求 13所述的液晶显示器 其中， 所述荧光膜设于所述出 光端的出光表面上。
18、 根据权利要求 13所述的液晶显示器 其中， 所述荧光膜设于所述入 光侧面上及所述出光端的出光表面上。
PCT/CN2013/070802 2013-01-15 2013-01-21 光导入系统、侧入式背光模组及液晶显示器 WO2014110836A1 (zh)

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