WO2012155377A1 - 使用uv光源的导光板及背光显示模块 - Google Patents

使用uv光源的导光板及背光显示模块 Download PDF

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Publication number
WO2012155377A1
WO2012155377A1 PCT/CN2011/075958 CN2011075958W WO2012155377A1 WO 2012155377 A1 WO2012155377 A1 WO 2012155377A1 CN 2011075958 W CN2011075958 W CN 2011075958W WO 2012155377 A1 WO2012155377 A1 WO 2012155377A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
phosphor
light guide
reflecting
Prior art date
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Ceased
Application number
PCT/CN2011/075958
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English (en)
French (fr)
Inventor
任杰
林博瑛
俞刚
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/203,738 priority Critical patent/US8680492B2/en
Publication of WO2012155377A1 publication Critical patent/WO2012155377A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G02B6/0003—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 doped with fluorescent agents
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • 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

Definitions

  • the invention relates to a light guide plate and a backlight display module, in particular to a light guide plate and a backlight display module using the UV light source, which can reduce the chromatic aberration of the single-edge light-input backlight.
  • FIG. 1 is a schematic structural view of a light guide plate of the prior art.
  • the light guide plate 100 of FIG. 1 includes a light incident surface 101, a reflective surface 102, a light exit surface 103, and a side reflective surface 104.
  • the light source 110 in Fig. 1 is UV (ultraviolet: Ultra) a light source, the light emitted by the light source 110 enters the light guide plate 100 through the light incident surface 101, and is converted into white light by converting the phosphor 111 (where the conversion phosphor 111 is a mixture of a yellow phosphor and a blue phosphor), and then converted.
  • the rear white light is totally reflected by the optical microstructure 105 on the reflective surface 102, and is emitted from the light exit surface 103.
  • the light is absorbed every time the optical microstructure 105 is scattered.
  • the optical microstructure 105 of the light guide plate 100 can be formed by printing or non-printing; the ink on the printed optical microstructure 105 mainly absorbs the short-wavelength light emitted by the light source 110, so When the light is transmitted to the side far from the light-incident surface 101, the color chromaticity of the light becomes larger (that is, the color changes toward the yellowish direction), and finally the in-plane color difference (that is, the color of each point in the backlight surface is uneven), the light guide plate The larger the size, the more obvious the color difference, which seriously affects the visual quality and the quality of the product.
  • Non-printing light guide plate such as microstructure for MS (methyl methacrylate / styrene copolymer, Methylmetahacrylate Styrene)
  • MS methyl methacrylate / styrene copolymer, Methylmetahacrylate Styrene
  • the main object of the present invention is to provide a light guide plate and a backlight display module using a UV light source to solve the problem of uneven color of dots in the backlight surface.
  • a light guide plate comprising:
  • a light-incident surface for receiving light; a conversion phosphor for converting the light into white light on the light-incident surface; for reflecting light received by the light-incident surface and destroying the light-incident surface a total reflection of the received light in the light guide plate to generate a reflective surface of the surface light; a light exiting surface for emitting the surface light; and a light for reflecting the light incident surface and the reflective surface, away from a side reflective surface of one end of the light incident surface;
  • the side reflective surface is provided with a compensation phosphor for adjusting the color of the surface light emitted by the light exit surface;
  • the compensation phosphor is doped in the body of the side reflective surface
  • a light transmissive film coated with the compensation phosphor is attached to an inner side of the side reflective surface
  • a light transmissive film doped with the compensation phosphor is attached to an inner side of the side reflective surface
  • the side reflective surface is provided with at least one corner.
  • the present invention also provides a light guide plate comprising: a light incident surface for receiving light; a conversion phosphor disposed on the light incident surface side for converting the light into white light; The light received by the light incident surface destroys the total reflection of the light received by the light incident surface in the light guide plate to generate a reflective surface of the surface light; the light exit surface for emitting the surface light; and The light incident on the light incident surface and the reflective surface is away from the side reflective surface of one end of the light incident surface; and the side reflective surface is provided with a compensation phosphor for adjusting the color of the surface light emitted by the light exit surface.
  • the present invention also provides a backlight display module, the backlight display module includes: a light guide plate and a UV light source; the light guide plate includes: a light incident surface for receiving light; and is disposed on the light incident surface side for Converting the light into a white light conversion phosphor; for reflecting the light received by the light incident surface and destroying the total reflection of the light received by the light incident surface in the light guide plate to generate a reflective surface of the surface light; a light emitting surface for emitting the surface light; and a light reflecting surface for reflecting the light incident surface and the light reflecting surface, a side reflecting surface away from one end of the light incident surface; and the side reflecting surface is provided with an adjustment a compensation phosphor for the color of the surface light emitted by the light exiting surface; the light source being disposed on a side of the light incident surface of the light guide plate for emitting light to the light incident surface.
  • the compensation phosphor is doped in the body of the side reflective surface and/or the conversion phosphor is doped in the body of the light incident surface.
  • the inner side of the side reflective surface is pasted with a light-transmissive film coated with the compensation phosphor and/or the inner side of the light-incident surface is coated with a coating of the conversion phosphor.
  • Light film is pasted with a light-transmissive film coated with the compensation phosphor and/or the inner side of the light-incident surface is coated with a coating of the conversion phosphor.
  • the inner side of the side reflective surface is pasted with a light transmissive film doped with the compensating phosphor and/or the inner side of the light incident surface is affixed with a doping of the converted phosphor. Light film.
  • the compensation phosphor comprises a blue phosphor; the conversion phosphor comprises a yellow phosphor and a blue phosphor.
  • At least one of the corners is disposed on the side reflective surface.
  • the light guide plate is a microstructured MS material light guide plate.
  • a brightness enhancement film for increasing light extraction efficiency is disposed on one side of the light exit surface.
  • the reflecting surface is provided with a reflecting unit for increasing the light reflecting efficiency.
  • the light guide plate and the backlight display module of the present invention use the compensation phosphor on the side reflective surface of the light guide plate to reduce one side compared with the problem of backlight chromatic aberration on the one side of the light guide plate and the backlight display module.
  • the difference in in-plane color of the in-light backlight to achieve good visual quality and product quality.
  • the light guide plate and the backlight display module of the present invention use the compensation phosphor on the side reflective surface of the light guide plate to reduce one side compared with the problem of backlight chromatic aberration on the one side of the light guide plate and the backlight display module.
  • the difference in in-plane color of the in-light backlight to achieve good visual quality and product quality.
  • FIG. 1 is a schematic structural view of a light guide plate of the prior art
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a light guide plate of the present invention
  • FIG 3 is a schematic structural view of a second preferred embodiment of the light guide plate of the present invention.
  • the backlight display module of the present invention is a laterally-lit backlight display module, and the backlight display module includes a light guide plate 200 and a light source 210.
  • the light source 210 is, for example, a cold cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL), Light Emitting Diode (LED), Organic Light Emitting Diode (Organic) Light Emitting Diode, OLED), Electro-Luminescence (EL), Light Bar (Light) Bar) or a UV source of any combination of the above.
  • the light guide plate 200 includes a light incident surface 201, a light reflecting surface 202, a light emitting surface 203, and a side reflecting surface 204.
  • the light incident surface 201 is configured to receive light
  • the reflective surface 202 is configured to reflect the light received by the light incident surface 201 and destroy the light.
  • the light reflected by the light surface 201 is totally reflected in the light guide plate 200 to generate surface light; the light exit surface 203 is used to emit the surface light; and the side light reflecting surface 204 is away from the end of the light incident surface 201 for reflection.
  • the compensation phosphor 206 of the color of the surface light emitted by the light surface 203 is described.
  • the light guide plate and the backlight display module of the present invention solve the problem of backlight chromatic aberration on the one side of the light guide plate and the backlight display module, and the first preferred embodiment of the light guide plate of the present invention shown in FIG. 2
  • a layer of compensating phosphor 206 is coated on the side reflecting surface 204 of the light guide plate 200.
  • the compensating phosphor 206 is mainly a phosphor that excites light of short wavelength, so that when the light is transmitted When the compensating phosphor 206 is encountered, more short-wavelength light is generated, and then reflected back to compensate for part of the short-wavelength light absorbed by the ink of the optical microstructure 205, and the color compensation method is used to make the light source 210 The color of the far outgoing light is compensated.
  • the compensating phosphor 206 may be doped into the body of the side reflecting surface 204, that is, the compensating phosphor 206 is mixed into a plastic or other material for manufacturing the body of the side reflecting surface 204 in a predetermined ratio. And it is dispersed in the body of the side reflecting surface 204 by means of injection molding.
  • a light transmissive film may also be applied on the inner side of the side reflective surface 204, and the film may be coated with a compensation phosphor 206 or doped with a compensation phosphor 206 in the light transmissive film.
  • the coating method may be: mixing the compensation phosphor 206 into a chemical solvent, and then applying the chemical solvent to the side reflective surface 204 by inkjet or directly applying the compensation phosphor 206 to the transparent film.
  • the method of doping the compensating phosphor 206 in the light transmissive film may be: dissolving and mixing the compensating phosphor 206 with the light transmissive material to form a film having doping. The user can select the appropriate way to set the compensating phosphor 206 on the side reflecting surface 204 as needed.
  • the conversion phosphor 211 is disposed on the light incident side in the same manner as described above.
  • the compensation phosphor 206 used includes the blue phosphor, so that when the transmitted light hits When the blue phosphor is excited, more short-wavelength light is generated, and then reflected back to compensate for part of the short-wavelength light absorbed by the ink of the optical microstructure 205, and the color compensation is used to make the light source 210 farther away. The color of the emitted light is compensated.
  • the compensation phosphors 206 are coated on the side reflective surface 204 to adjust different ratios according to different light guide plate sizes.
  • the same conversion phosphor 211 is mainly a yellow phosphor and a blue phosphor, and can be correspondingly proportioned according to the wavelength of the UV source to generate desired white light.
  • the compensation phosphor 206 is disposed on the side reflective surface 204 to reduce the difference in the in-plane color of the one-side incident backlight, no matter what manner the compensation phosphor 206 is disposed on the side reflective surface 204. It belongs to the scope of protection of the present invention.
  • the light guide plate 300 includes a light incident surface 301, a light reflecting surface 302, a light emitting surface 303, and a side reflecting surface 304.
  • the light incident surface 301 is configured to receive light
  • the reflective surface 302 is configured to reflect the light received by the light incident surface 301 and destroy the light.
  • the light reflected by the light surface 301 is totally reflected in the light guide plate 300 to generate surface light; the light exit surface 303 is used to emit the surface light; and the side reflective surface 304 is away from the light incident surface 301 for reflection.
  • the compensating phosphor 306 of the color of the surface ray emitted by the smooth surface 303 is described.
  • at least one edge 307 is disposed on the side reflecting surface 304.
  • the angular design of the surface 302, the light-emitting surface 303, and the side reflective surface 304, particularly the edge 307 on the side reflective surface 304, can effectively adjust the light angle, thereby increasing the light-emitting efficiency of the light guide plate 300.
  • a brightness enhancement film 308 for increasing light extraction efficiency is disposed on one side of the light exit surface 303.
  • a reflecting unit 309 for increasing the light reflecting efficiency is disposed on one side of the reflecting surface 302. As shown in FIG. 3, the reflecting unit 309 is configured to reflect the light that passes through the light guide plate 300 back to the light guide plate 300 to increase the light usage rate.
  • the brightness enhancing film 308 is disposed on the light emitting surface 303 side of the light guide plate 300. To increase the light extraction efficiency of the light guide plate 300.
  • the compensating phosphor 306 can be doped into the body of the side reflecting surface 304, that is, the compensating phosphor 306 is mixed into the body or the other material for manufacturing the side of the side reflecting surface 304 in a predetermined ratio. And dispersed in the body of the side reflecting surface 304 by means of mold injection molding.
  • a light transmissive film may also be applied on the inner side of the side reflective surface 304, and the film is coated with a compensation phosphor 306 or a doped compensation phosphor 306 in the light transmissive film.
  • the coating method may be: mixing the compensation phosphor 306 into a chemical solvent, and then applying the chemical solvent to the side reflective surface 304 by inkjet or directly applying the compensation phosphor 306 to the transparent film.
  • the method of doping the compensating phosphor 306 in the light transmissive film may be: dissolving and mixing the compensating phosphor 306 with the light transmissive material to form a doped film.
  • the user can set the compensation phosphor 306 on the side reflecting surface 304 according to a suitable manner.
  • the conversion phosphor 311 is disposed on the light incident side in the same manner as described above.
  • the light guide plate is a microstructured MS material light guide plate.
  • the light guide plate of the present invention is also applicable to a light guide plate of other materials of non-printing type, such as a light guide plate of a microstructured MS material.
  • the main reason for the color difference of the MS material light guide plate is that the MS material itself absorbs short-wavelength light, so the same
  • the light guide plate structure of the present invention can be used to solve in-plane chromatic aberration and improve visual quality and product quality.
  • the present invention also relates to a backlight display module, the backlight display module includes a light guide plate and a UV light source, the light guide plate includes: a light incident surface for receiving light; and is disposed on the light incident surface side for a conversion phosphor for converting light into white light; for reflecting light received by the light incident surface and destroying a total reflection of light received by the light incident surface in the light guide plate to generate a reflective surface of the surface light; a light emitting surface for emitting the surface light; and a light reflecting surface for reflecting the light incident surface and the light reflecting surface, a side reflecting surface away from one end of the light incident surface; and the side reflecting surface is provided with adjusting the light emitting surface a compensation phosphor for the color of the surface light emitted by the surface; the UV light source being disposed on a side of the light incident surface of the light guide plate for emitting light to the light incident surface.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Description

使用UV光源的导光板及背光显示模块 技术领域
本发明涉及一种导光板及背光显示模块，特别是涉及一种可减轻单边入光背光色差的使用UV光源的导光板及背光显示模块。
 背景技术
目前在侧入光背光模块中，采用发光二极管（light-emitting diode，LED）或者冷阴极荧光灯管（Cold Cathode Fluorescent Lamp，CCFL）等作为光源。为满足薄型化的发展要求，大尺寸背光模块已经慢慢设计为单边入光，且随着光源发光效率的提升会使得单边入光成为设计的趋势。但是随之也会出现一些设计上问题，图1为现有技术的导光板的结构示意图，图1中的导光板100包括入光面101、反光面102、出光面103以及侧反光面104，图1中光源110为UV(紫外：Ultra Violet)光源，光源110发出的光线经入光面101进入到导光板100后，通过转换荧光粉111转换为白光（其中转换荧光粉111为黄色荧光粉和蓝色荧光粉的混合物），然后转换后的白光被反光面102上的光学微结构105破坏光线的全反射，从出光面103出射，但是光线在导光板内传播时，光线每碰到一次光学微结构105被散射的同时也被吸收掉部分波长光线的能量，因此光线每一次被散射其频谱都会变化，所以当光线从导光板100的一侧传递到另一侧时，光线的颜色也在逐渐的变化。现有侧入光背光模块中，导光板100的光学微结构105可以采用印刷式或者非印刷式形成；印刷式光学微结构105上的油墨主要吸收的是光源110发出的短波长的光，故导致光线传递到远离入光面101一侧时光的颜色色度会变大（即颜色会朝偏黄的方向变化），最终出现面内色差(即背光面内各点颜色不均匀)，导光板的尺寸越大色差越明显，严重影响视觉品质和产品的质量。非印刷式导光板，采用如微结构为MS（甲基丙烯酸甲酯/苯乙烯共聚合物，Methylmetahacrylate Styrene）材料或者其他材料的导光板，由于MS材料或者其他材料本身吸收短波长同样会导致出现面内色差。
故，有必要提供一种使用UV光源的导光板及背光显示模块，以解决现有技术所存在的问题。
 技术问题
本发明的主要目的在于提供一种使用UV光源的导光板及背光显示模块，以解决的背光面内各点颜色不均匀的问题。
 技术解决方案
本发明提供的技术方案如下：
一种导光板，包括：
用于接收光线的入光面；设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；用于发射所述面光线的出光面；以及，用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；
所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉；
所述补偿荧光粉掺杂于所述侧反光面的本体内；或，
所述侧反光面的内侧贴有涂覆所述补偿荧光粉的透光薄膜；或，
所述侧反光面的内侧贴有掺杂所述补偿荧光粉的透光薄膜；
所述侧反光面上设置有至少一个棱角。
本发明还提供一种导光板，所述导光板包括：用于接收光线的入光面；设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；用于发射所述面光线的出光面；以及用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉。
本发明还提供一种背光显示模块，所述背光显示模块包括：导光板以及UV光源；所述导光板包括：用于接收光线的入光面；设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；用于发射所述面光线的出光面；以及用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉；所述光源设置在所述导光板的入光面的一侧，用于向所述入光面发射光线。
在本发明的一实施例中，所述补偿荧光粉掺杂于所述侧反光面的本体内和/或所述转换荧光粉掺杂于所述入光面的本体内。
在本发明的一实施例中，所述侧反光面的内侧贴有涂覆所述补偿荧光粉的透光薄膜和/或所述入光面的内侧贴有涂覆所述转换荧光粉的透光薄膜。
在本发明的一实施例中，所述侧反光面的内侧贴有掺杂所述补偿荧光粉的透光薄膜和/或所述入光面的内侧贴有掺杂所述转换荧光粉的透光薄膜。
在本发明的一实施例中，所述补偿荧光粉包括蓝光荧光粉；所述转换荧光粉包括黄光荧光粉和蓝光荧光粉。
在本发明的一实施例中，所述侧反光面上设置有至少一个棱角。
在本发明的一实施例中，所述导光板为微结构MS材料导光板。
在本发明的一实施例中，所述出光面一侧设置有用于增加出光效率的增亮膜。
在本发明的一实施例中，所述反光面一侧设置有用于增加反光效率的反射单元。
相较于现有的导光板及背光显示模块的单侧入光出现背光色差的问题，本发明的导光板及背光显示模块利用在导光板的侧反光面上涂覆补偿荧光粉来减轻单侧入光式背光的面内颜色的差异以达到良好的视觉品质和产品质量。
 有益效果
相较于现有的导光板及背光显示模块的单侧入光出现背光色差的问题，本发明的导光板及背光显示模块利用在导光板的侧反光面上涂覆补偿荧光粉来减轻单侧入光式背光的面内颜色的差异以达到良好的视觉品质和产品质量。
附图说明
图1为现有技术的导光板的结构示意图；
图2为本发明的导光板的第一较佳实施例的结构示意图；
图3为本发明的导光板的第二较佳实施例的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。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2，其为本发明的导光板的第一较佳实施例的结构示意图。本发明的背光显示模块为侧向式入光的背光显示模块，背光显示模块包括导光板200及光源210。光源210为例如冷阴极荧光灯管（Cold Cathode Fluorescent Lamp，CCFL）、发光二极管(Light Emitting Diode，LED)、有机发光二极管(Organic Light Emitting Diode，OLED)、电激发光组件(Electro-Luminescence，EL)、发光灯条(Light Bar)或上述的任意组合的UV光源。导光板200包括入光面201、反光面202、出光面203以及侧反光面204，入光面201用于接收光线；反光面202用于反射所述入光面201接收的光线，并破坏所述入光面201接收的光线在所述导光板200内的全反射以产生面光线；出光面203用于发射所述面光线；侧反光面204远离所述入光面201一端，用于反射所述入光面201和所述反光面202的光线；转换荧光粉211设置在所述入光面201侧，用于将所述光线转换为白光；所述侧反光面204上设置有调整所述出光面203发射的面光线的颜色的补偿荧光粉206。
本发明的导光板及背光显示模块为了解决现有的导光板及背光显示模块的单侧入光出现背光色差的问题，在图2所示的本发明的导光板的第一较佳实施例的结构示意图中，在导光板200的侧反光面204上涂布一层补偿荧光粉206，此补偿荧光粉206主要是以激发能产生短波长的光的荧光粉为主，这样当传递过来的光线碰到补偿荧光粉206时就会激发产生较多的短波长的光，然后再反射回去补偿被光学微结构205的油墨吸收掉的部分短波长的光，利用颜色补偿的方式使得离光源210较远的出射光的颜色得到补偿。
作为本发明的较佳实施例，补偿荧光粉206可掺杂于侧反光面204的本体内，即补偿荧光粉206依预定比例混入用于制造侧反光面204的本体的塑料或者其他材料中，并借由模具射出成型的方式，散布于侧反光面204的本体内。也可在侧反光面204的内侧贴覆透光薄膜，薄膜上涂覆有补偿荧光粉206或在透光薄膜中掺杂补偿荧光粉206。涂覆方式可为：将补偿荧光粉206混入于化学溶剂中，再将该化学溶剂以喷墨方式涂布于侧反光面204上或直接将补偿荧光粉206涂覆于透光薄膜上。在透光薄膜中掺杂补偿荧光粉206的方式可为：将补偿荧光粉206与透光材料解热混合再冷却以后形成具有掺杂的薄膜。用户可以根据需要选择合适的方式在侧反光面204上设置补偿荧光粉206。转换荧光粉211可采用上述同样的方式设置在入光面侧。
作为本发明的较佳实施例，由于目前光学微结构205上油墨主要吸收的是光源210发出的短波长的光，因此采用的补偿荧光粉206包括有蓝光荧光粉，这样当传递过来的光线碰到蓝光荧光粉时就会激发产生较多的短波长的光，然后再反射回去补偿被光学微结构205的油墨吸收掉的部分短波长的光，利用颜色补偿的方式使得离光源210较远的出射光的颜色得到补偿。同时在侧反光面204上涂覆补偿荧光粉206可以根据不同的导光板尺寸调整不同的比例，当单边入光的导光板210的尺寸越大时则需要配比较多的蓝光荧光粉来多补偿短波长的光，否则导光板210尺寸越大光线传递越远，面内色差越严重。同样转换荧光粉211主要为黄光荧光粉和蓝光荧光粉，可以根据UV光源的波长进行相应的比例配置以产生所需要的白光。
综上所述，只要是在侧反光面204上设置补偿荧光粉206用来减轻单侧入光式背光的面内颜色的差异，不管补偿荧光粉206采用什么方式设置在侧反光面204上都属于本发明的保护范围。
在图3所示的本发明的导光板的第二较佳实施例的结构示意图中。导光板300包括入光面301、反光面302、出光面303以及侧反光面304，入光面301用于接收光线；反光面302用于反射所述入光面301接收的光线，并破坏所述入光面301接收的光线在所述导光板300内的全反射以产生面光线；出光面303用于发射所述面光线；侧反光面304远离所述入光面301一端，用于反射所述入光面301和所述反光面302的光线；转换荧光粉311设置在所述入光面301侧，用于将所述光线转换为白光；所述侧反光面304上设置有调整所述出光面303发射的面光线的颜色的补偿荧光粉306。同时所述侧反光面304上还设置有至少一个棱角307。由反射定理可知，当棱角307越小时则光线被偏折的角度越大，而当棱角307越大时则光线被偏折的角度越小，借由导光板300上的入光面301、反光面302、出光面303以及侧反光面304的棱角设计，特别是侧反光面304上的棱角307设计可有效的调整出光角度，进而增加导光板300的出光效率。其中棱角的数量、形状等设计可以根据出光效率等原因进行调整，并不因此限制本发明的保护范围，只要是在侧反光面304上设置补偿荧光粉306用来减轻单侧入光式背光的面内颜色的差异，都属于本发明的保护范围。所述出光面303一侧设置有用于增加出光效率的增亮膜308。所述反光面302一侧设置有用于增加反光效率的反射单元309。如图3所示，反射单元309用于将向下穿出导光板300的光线反射回导光板300以增加光的使用率，增亮膜308设置在导光板300的出光面303一侧，用来增加导光板300的出光效率。
本发明的第二较佳实施例中，补偿荧光粉306可掺杂于侧反光面304的本体内，即补偿荧光粉306依预定比例混入用于制造侧反光面304的本体的塑料或者其他材料中，并借由模具射出成型的方式，散布于侧反光面304的本体内。也可在侧反光面304的内侧贴覆透光薄膜，薄膜上涂覆有补偿荧光粉306或在透光薄膜中掺杂补偿荧光粉306。涂覆方式可为：将补偿荧光粉306混入于化学溶剂中，再将该化学溶剂以喷墨方式涂覆于侧反光面304上或直接将补偿荧光粉306涂覆于透光薄膜上。在透光薄膜中掺杂补偿荧光粉306的方式可为：将补偿荧光粉306与透光材料解热混合再冷却以后形成具有掺杂的薄膜。用户可以根据需要选择合适的方式在侧反光面304上设置补偿荧光粉306。转换荧光粉311可采用上述同样的方式设置在入光面侧。
作为本发明的较佳实施例，导光板为微结构MS材料导光板。本发明的导光板也适用于非印刷式的其他材料的导光板，如微结构MS材料导光板等，MS材料导光板产生色差的主要原因是MS材料本身吸收短波长的光造成的，故同样可以用本发明的导光板结构去解决面内色差，改善视觉品位和产品质量。
本发明还涉及一种背光显示模块，所述背光显示模块包括导光板以及UV光源，所述导光板包括：用于接收光线的入光面；设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；用于发射所述面光线的出光面；以及用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉；所述UV光源设置在所述导光板的入光面的一侧，用于向所述入光面发射光线。
综上所述，虽然本发明已以较佳实施例揭露如上，但上述较佳实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
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Claims (15)

  1. 一种导光板，包括：
    用于接收光线的入光面；
    设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；
    用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；
    用于发射所述面光线的出光面；以及
    用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；
    其特征在于：
    所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉；所述补偿荧光粉掺杂于所述侧反光面的本体内；或，
    所述侧反光面的内侧贴有涂覆所述补偿荧光粉的透光薄膜；或，
    所述侧反光面的内侧贴有掺杂所述补偿荧光粉的透光薄膜；
    所述侧反光面上设置有至少一个棱角。
  2. 一种导光板，包括：
    用于接收光线的入光面；
    设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；
    用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；
    用于发射所述面光线的出光面；以及
    用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；
    其特征在于：
    所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉。
  3. 根据权利要求2所述的导光板，其特征在于，所述补偿荧光粉掺杂于所述侧反光面的本体内。
  4. 根据权利要求2所述的导光板，其特征在于，所述侧反光面的内侧贴有涂覆所述补偿荧光粉的透光薄膜。
  5. 根据权利要求2所述的导光板，其特征在于，所述侧反光面的内侧贴有掺杂所述补偿荧光粉的透光薄膜。
  6. 根据权利要求2所述的导光板，其特征在于，所述补偿荧光粉包括蓝光荧光粉。
  7. 根据权利要求2所述的导光板，其特征在于，所述侧反光面上设置有至少一个棱角。
  8. 根据权利要求2所述的导光板，其特征在于，所述导光板为微结构MS材料导光板。
  9. 根据权利要求2所述的导光板，其特征在于，所述出光面一侧设置有用于增加出光效率的增亮膜。
  10. 根据权利要求2所述的导光板，其特征在于，所述反光面一侧设置有用于增加反光效率的反射单元。
  11. 一种背光显示模块，其特征在于，包括导光板以及UV光源，
    所述导光板包括：
    用于接收光线的入光面；
    设置在所述入光面侧，用于将所述光线转换为白光的转换荧光粉；
    用于反射所述入光面接收的光线并破坏所述入光面接收的光线在所述导光板内的全反射以产生面光线的反光面；
    用于发射所述面光线的出光面；以及
    用于反射所述入光面和所述反光面的光线，远离所述入光面一端的侧反光面；
    所述侧反光面上设置有调整所述出光面发射的面光线的颜色的补偿荧光粉；
    所述UV光源设置在所述导光板的入光面的一侧，用于向所述入光面发射光线。
  12. 根据权利要求11所述的背光显示模块，其特征在于，所述补偿荧光粉掺杂于所述侧反光面的本体内。
  13. 根据权利要求11所述的背光显示模块，其特征在于，所述侧反光面的内侧贴有涂覆所述补偿荧光粉的透光薄膜。
  14. 根据权利要求11所述的背光显示模块，其特征在于，所述侧反光面的内侧贴有掺杂所述补偿荧光粉的透光薄膜。
  15. 根据权利要求11所述的背光显示模块，其特征在于，所述侧反光面上设置有至少一个棱角。
PCT/CN2011/075958 2011-05-19 2011-06-20 使用uv光源的导光板及背光显示模块 Ceased WO2012155377A1 (zh)

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