WO2012155366A1 - 导光板及背光模块 - Google Patents

导光板及背光模块 Download PDF

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Publication number
WO2012155366A1
WO2012155366A1 PCT/CN2011/074981 CN2011074981W WO2012155366A1 WO 2012155366 A1 WO2012155366 A1 WO 2012155366A1 CN 2011074981 W CN2011074981 W CN 2011074981W WO 2012155366 A1 WO2012155366 A1 WO 2012155366A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
phosphor
light guide
reflecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/074981
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English (en)
French (fr)
Inventor
任杰
林博瑛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/145,009 priority Critical patent/US20140071709A1/en
Publication of WO2012155366A1 publication Critical patent/WO2012155366A1/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
    • G02B6/0011—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
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side 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
    • G02B6/0033—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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Definitions

  • the invention relates to a light guide plate and a backlight module, in particular to a light guide plate and a backlight module capable of reducing the chromatic aberration of a single-edge light-input backlight.
  • FIG. 1 a schematic diagram of a structure of a prior art light guide plate is disclosed.
  • the light guide plate 100 of FIG. 1 includes a side light incident surface 101 , a reflective surface 102 , a light exit surface 103 , and a side reflective surface 104 .
  • the light emitted by the light source 110 enters the light guide plate 100 through the side entrance light surface 101, and then destroys the total reflection of the light through the optical microstructure 105 on the reflective surface 102, so that the light exit surface 103 emits light, but when the light propagates in the light guide plate, the light is transmitted every time.
  • the optical microstructure 105 When the optical microstructure 105 is scattered, the energy of part of the wavelength light (especially blue light) is also absorbed, so that the spectrum of the light is changed every time the light is scattered, so when the light is transmitted from one side of the light guide plate 100 to another On one side, the color of the light is gradually changing due to the lack of partial wavelength light.
  • the energy of part of the wavelength light especially blue light
  • 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. (such as blue light), so the color chromaticity of the light will increase when the light is transmitted to the side away from the side entrance surface 101 (that is, the color will change toward the yellowish direction), and finally the in-plane color difference (ie, the points in the backlight plane) The color is uneven. The larger the size of the light guide plate, the more obvious the color difference is, which seriously affects the visual quality and the quality of the product.
  • non-printing light guides use, for example, a microstructured methyl methacrylate/styrene copolymer (Methylmetahacrylate) Styrene, MS)
  • a microstructured methyl methacrylate/styrene copolymer Metalmetahacrylate Styrene, MS
  • the invention provides a light guide plate and a backlight module to solve the problem of uneven color of various points in the backlight surface of the conventional flat panel display.
  • a main object of the present invention is to provide a light guide plate, the light guide plate includes: a side entrance light surface for receiving light; a reflective surface for reflecting the light received by the side light incident surface and generating surface light; a light emitting surface for emitting the surface light; and a light for reflecting the side light incident surface and the light reflecting surface, and a side light filling surface standing on the side light incident surface; wherein the side light filling surface Providing a phosphor thereon, being excited by the light to generate compensation light to adjust a color of the surface light emitted by the light-emitting surface; the phosphor is doped in the body of the side-filling surface; At least one edge is provided on the glossy surface.
  • the present invention also provides a light guide plate, the light guide plate comprising: a side entrance light surface for receiving light; a reflective surface for reflecting the light received by the side entrance light surface and generating surface light; a light emitting surface of the surface light; and a light for reflecting the side light incident surface and the light reflecting surface, and a side light filling surface standing on the side light incident surface; wherein the side fill surface is provided with The phosphor is excited by the light to generate compensation light to adjust the color of the surface light emitted by the light exit surface.
  • Another object of the present invention is to provide a backlight module, the backlight module comprising:
  • a light source used to generate light
  • the light guide plate includes:
  • a side entrance light surface for receiving light generated by the light source
  • the side light filling surface is provided with a phosphor, and is excited by the light Compensating light is generated to adjust the color of the surface light emitted by the light exiting surface.
  • the phosphor is doped in the body of the side fill surface.
  • the side fill surface is coated with a light transmissive film coated with the phosphor.
  • the side fill surface is pasted with a light transmissive film doped with the phosphor.
  • the phosphor comprises a blue phosphor.
  • the side fill surface is provided with at least one corner.
  • the light guide plate is a microstructured methyl methacrylate/styrene copolymer (MS) 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 module of the present invention use the phosphor on the side fill surface of the light guide plate to reduce the unilateral light input, compared with the problem of backlight chromatic aberration on the one side of the light guide plate and the backlight module.
  • the difference in in-plane color of the backlight to achieve good visual quality and product quality.
  • the light guide plate and the backlight module of the present invention use the phosphor on the side fill surface of the light guide plate to reduce the unilateral light input, compared with the problem of backlight chromatic aberration on the one side of the light guide plate and the backlight module.
  • the difference in in-plane color of the 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 module of the present invention is a side-lit light-emitting backlight module, and the backlight 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 any combination of the above.
  • the light guide plate 200 includes a side entrance surface 201, a reflective surface 202, a light exit surface 203, and a side fill surface 204, wherein the side entrance surface 201 is for receiving light, and the reflective surface 202 is for reflecting the side entrance surface 201 for receiving Light, and destroying the total reflection of the light received by the side entrance surface 201 in the light guide plate 200 to generate surface light; the light exit surface 203 is used to emit the surface light; the side fill surface 204 is located away from the side One end of the light incident surface 201, that is, the pair of the light incident surface 201, the side light filling surface 204 is used to reflect the light entering the side light incident surface 201 and the reflective surface 202;
  • the surface 204 is provided with a phosphor 206, and the phosphor 206 can be excited by the light to generate compensation light to adjust the color of the surface light emitted by the light-emitting surface 203.
  • the light guide plate and the backlight module of the present invention are used to solve the problem of backlight chromatic aberration caused by the light incident on one side of the light guide plate and the backlight module, and the structure of the first preferred embodiment of the light guide plate of the present invention shown in FIG.
  • a phosphor 206 is coated on the side fill surface 204 of the light guide plate 200.
  • the phosphor 206 is mainly composed of a phosphor that excites light of a short wavelength, so that the transmitted light hits the fluorescent light.
  • the powder 206 When the powder 206 is excited, more short-wavelength compensation light is generated, and then reflected back to compensate for part of the short-wavelength light (for example, blue light) absorbed by the ink of the optical microstructure 205, and the light source 210 is used to compensate the light source 210. The color of the far outgoing light is compensated.
  • part of the short-wavelength light for example, blue light
  • the phosphor 206 may be doped in the body (substrate) of the side fill surface 204, that is, the phosphor 206 is mixed into the body of the body for fabricating the side fill surface 204 in a predetermined ratio or
  • the other materials are dispersed in the body of the side fill surface 204 by means of injection molding.
  • the light transmissive film may also be applied to the surface of the side fill surface 204, and the film may be coated with a phosphor 206 or doped with a phosphor 206 in the light transmissive film.
  • the coating method may be: mixing the phosphor 206 into a chemical solvent, and then applying the chemical solvent to the surface of the side fill surface 204 by inkjet or directly applying the phosphor 206 to the light-transmissive film.
  • the method of doping the phosphor 206 in the light transmissive film may be: dissolving and mixing the phosphor 206 and the light transmissive material to form a film having doping. The user can select the appropriate way to set the phosphor 206 on the side fill surface 204 as needed.
  • the phosphor 206 used includes the blue phosphor, so that when the transmitted light hits When the blue phosphor is excited, more short-wavelength compensation 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.
  • coating the phosphor 206 on the side fill surface 204 can adjust different ratios according to different light guide plate sizes.
  • the size of the light guide plate 210 with one side entering light is larger, more blue phosphors need to be matched.
  • the short-wavelength light is compensated, otherwise the larger the size of the light guide plate 210 is, the farther the light is transmitted, and the more the in-plane color difference is.
  • the phosphor 206 is disposed on the side fill surface 204 to reduce the difference in the in-plane color of the one-side incident backlight, regardless of the manner in which the phosphor 206 is disposed on the side fill surface 204, It belongs to the scope of protection of the present invention.
  • the light guide plate 300 includes a side entrance surface 301, a reflective surface 302, a light exit surface 303, and a side fill surface 304.
  • the side light incident surface 301 is for receiving light
  • the reflective surface 302 is for reflecting the side light incident surface 301.
  • the light exit surface 303 is used to emit the surface light
  • the side fill surface 304 is located away from the side One end of the light incident surface 301, that is, the pair of the light incident surface 301, the side light filling surface 304 is used to reflect the light incident on the side light incident surface 301 and the reflective surface 302;
  • the surface 304 is provided with a phosphor 306 which is excited by the light to generate compensation light to adjust the color of the surface light emitted by the light exit surface 303.
  • the side fill surface 304 is further provided with at least one outwardly protruding corner 307. It can be seen from the reflection theorem that the smaller the angle between the corners 307 is, the larger the angle at which the light is deflected, and the smaller the angle of the corners 307 is, the smaller the angle at which the light is deflected is obtained by the light guide plate 300.
  • the edge design of the side entrance surface 301, the reflective surface 302, the light exit surface 303, and the side fill surface 304, especially the edge 307 on the side fill surface 304, can effectively adjust the light angle, thereby increasing the light extraction efficiency of the light guide plate 300. .
  • the design of the number, shape and the like of the corners can be adjusted according to the light-emitting efficiency and the like, and does not limit the protection range of the present invention, as long as the phosphor 306 is disposed on the side-filling surface 304 to reduce the one-side light-indicating backlight.
  • the difference in in-plane color is within the scope of protection of the present invention.
  • a brightness enhancement film 308 for increasing light extraction efficiency may be disposed on one side of the light exit surface 303.
  • a reflection unit 309 for increasing the light reflection efficiency may be disposed on one side of the reflective 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 phosphor 306 may be doped in the body (substrate) of the side fill surface 304, that is, the phosphor 306 is mixed into the body for fabricating the side fill surface 304 in a predetermined ratio.
  • the plastic or other material is dispersed in the body of the side fill surface 304 by means of injection molding.
  • the light transmissive film may also be applied to the surface of the side fill surface 304, and the film may be coated with a phosphor 306 or doped with a phosphor 306 in the light transmissive film.
  • the coating method may be: mixing the phosphor 306 into a chemical solvent, and then applying the chemical solvent to the surface of the side fill surface 304 by inkjet or directly applying the phosphor 306 to the light-transmissive film.
  • the method of doping the phosphor 306 in the light transmissive film may be: dissolving and mixing the phosphor 306 with the light transmissive material to form a film having doping. The user can select the appropriate way to set the phosphor 306 on the side fill surface 304 as needed.
  • the light guide plate is a microstructured methyl methacrylate/styrene copolymer (Methylmetahacrylate) Styrene, MS) light guide.
  • the light guide plate of the present invention is also applicable to light guide plates of other materials such as non-printing materials, such as a microstructured MS light guide plate.
  • the main reason for the color difference of the MS light guide plate is that the MS material itself absorbs short-wavelength light (for example, blue light). Therefore, the light guide plate structure of the present invention can also be used to solve the in-plane chromatic aberration and improve the visual quality and product quality.
  • the invention also relates to a backlight module comprising a light source and a light guide plate.
  • the light source is for generating light.
  • the light guide plate includes: a side light incident surface for receiving light generated by the light source; a reflective surface for reflecting light received by the side light incident surface and destroying light received by the side light incident surface Full reflection in the light guide plate to generate surface light; a light exit surface for emitting the surface light; and a side fill surface for reflecting the side light incident surface and the light reflecting surface, and standing on the light a side light incident surface; wherein the side fill surface is provided with a phosphor, and the light is excited to generate compensation light to adjust the color of the surface light emitted by the light exit surface.

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

Description

导光板及背光模块 技术领域
本发明涉及一种导光板及背光模块，特别是涉及一种可减轻单边入光背光色差的导光板及背光模块。
 背景技术
目前在侧入光背光模组中，发光二极管（light-emitting diode，LED）或者冷阴极荧光灯管（Cold Cathode Fluorescent Lamp，CCFL）等提供光源。随着设计和薄型化的发展，大尺寸背光模组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。
如图1所示，其揭示一种现有技术的导光板的结构示意图，图1中的导光板100包括侧入光面101、反光面102、出光面103以及侧反光面104，图1中光源110发出的光线经侧入光面101进入到导光板100后通过反光面102上的光学微结构105破坏光线的全反射使得出光面103出射光，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(特别是蓝光)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，光线的颜色也因缺少了部分波长光线而在逐渐的变化中。
在现有侧入光背光模组中，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(如蓝光)，故导致光线传递到远离侧入光面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，严重影响视觉品位和产品的质量。
另一方面，非印刷式导光板，采用如具微结构的甲基丙烯酸甲酯/苯乙烯共聚合物(Methylmetahacrylate Styrene，MS)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光，故同样会导致出现面内色差。
故，有必要提供一种导光板及背光模块，以解决现有技术所存在的问题。
 技术问题
本发明提供一种导光板以及背光模块，以解决现有平板显示器背光面内各点颜色不均匀的问题。
 技术解决方案
本发明的主要目的在于提供一种导光板，所述导光板包括：用于接收光线的侧入光面；用于反射所述侧入光面接收的光线并产生面光线的反光面；用于发射所述面光线的出光面；以及，用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面的侧补光面；其中所述侧补光面上设置有荧光粉，受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色；所述荧光粉掺杂于所述侧补光面的本体内；所述侧补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：用于接收光线的侧入光面；用于反射所述侧入光面接收的光线并产生面光线的反光面；用于发射所述面光线的出光面；以及，用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面的侧补光面；其中所述侧补光面上设置有荧光粉，受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色。
本发明的另一目的在于提供一种背光模块，所述背光模块包括：
用以产生光线的光源；以及
导光板，所述导光板包括：
用于接收所述光源产生的光线的侧入光面；
用于反射所述侧入光面接收的光线并破坏所述侧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
用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面的侧补光面；所述侧补光面上设置有荧光粉，受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色。
在本发明的一实施例中，所述荧光粉掺杂于所述侧补光面的本体内。
在本发明的一实施例中，所述侧补光面贴有涂覆所述荧光粉的透光薄膜。
在本发明的一实施例中，所述侧补光面贴有掺杂所述荧光粉的透光薄膜。
在本发明的一实施例中，所述荧光粉包括蓝光荧光粉。
在本发明的一实施例中，所述侧补光面上设置有至少一个棱角。
在本发明的一实施例中，所述导光板为具微结构的甲基丙烯酸甲酯/苯乙烯共聚合物(MS)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模块利用在导光板的侧补光面上涂布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位和产品质量。
 有益效果
相较于现有的导光板及背光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模块利用在导光板的侧补光面上涂布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位和产品质量。
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；及
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。本发明的背光模块为侧向式入光的背光模块，背光模块包括导光板200及光源210。光源210例如为冷阴极荧光灯管（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。导光板200包括侧入光面201、反光面202、出光面203以及侧补光面204，其中侧入光面201用于接收光线；反光面202用于反射所述侧入光面201接收的光线，并破坏所述侧入光面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；侧补光面204位于远离所述侧入光面201的一端，也就是对位于所述侧入光面201，所述侧补光面204用于反射所述侧入光面201和所述反光面202的光线；所述侧补光面204上设置有荧光粉206，荧光粉206可受所述光线激发而产生补偿光，以调整所述出光面203发射的面光线的颜色。
本发明的导光板及背光模块为了解决现有的导光板及背光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的侧补光面204上涂布一层荧光粉206，此荧光粉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荧光粉206时就会激发产生较多的短波长的补偿光，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(例如蓝光)，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，荧光粉206可掺杂于侧补光面204的本体(基材)内，即荧光粉206依预定比例混入用于制造侧补光面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，散布于侧补光面204的本体内。也可在侧补光面204的表面贴覆透光薄膜，薄膜上涂覆有荧光粉206或在透光薄膜中掺杂荧光粉206。涂覆方式可为：将荧光粉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补光面204表面上或直接将荧光粉206涂布于透光薄膜上。在透光薄膜中掺杂荧光粉206的方式可为：将荧光粉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补光面204上设置荧光粉206。
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，因此采用的荧光粉206包括由蓝光荧光粉，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补偿光，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。同时在侧补光面204上涂布荧光粉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。
综上所述，只要是在侧补光面204上设置荧光粉206用来减轻单侧入光式背光的面内颜色的差异，不管荧光粉206采用什么方式设置在侧补光面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包括侧入光面301、反光面302、出光面303以及侧补光面304，其中侧入光面301用于接收光线；反光面302用于反射所述侧入光面301接收的光线，并破坏所述侧入光面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；侧补光面304位于远离所述侧入光面301的一端，也就是对位于所述侧入光面301，所述侧补光面304用于反射所述侧入光面301和所述反光面302的光线；所述侧补光面304上设置有荧光粉306，可受所述光线激发而产生补偿光，以调整所述出光面303发射的面光线的颜色。
同时，所述侧补光面304上还设置有至少一个向外凸出的棱角307。由反射定理可知，当棱角307的夹角越小时则光线被偏折的角度越大，而当棱角307的夹角越大时则光线被偏折的角度越小，借由导光板300上的侧入光面301、反光面302、出光面303以及侧补光面304的棱角设计，特别是侧补光面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，只要是在侧补光面304上设置荧光粉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。
再者，所述出光面303一侧可设置有用于增加出光效率的增亮膜308。所述反光面302一侧可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，荧光粉306可掺杂于侧补光面304的本体(基材)内，即荧光粉306依预定比例混入用于制造侧补光面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，散布于侧补光面304的本体内。也可在侧补光面304的表面贴覆透光薄膜，薄膜上涂覆有荧光粉306或在透光薄膜中掺杂荧光粉306。涂覆方式可为：将荧光粉306混入于化学溶剂中，再将该化学溶剂以喷墨方式涂布于侧补光面304表面上或直接将荧光粉306涂布于透光薄膜上。在透光薄膜中掺杂荧光粉306的方式可为：将荧光粉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补光面304上设置荧光粉306。
作为本发明的较佳实施例，导光板为具微结构的甲基丙烯酸甲酯/苯乙烯共聚合物(Methylmetahacrylate Styrene，MS)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，如具微结构的MS导光板等，MS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(例如蓝光)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模块，所述背光模块包括光源以及导光板。所述光源，用以产生光线。所述导光板包括：侧入光面，用于接收所述光源产生的光线；反光面，用于反射所述侧入光面接收的光线并破坏所述侧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；出光面，用于发射所述面光线；以及侧补光面，用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面；其中所述侧补光面上设置有荧光粉，受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色。
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：
    用于接收光线的侧入光面；
    用于反射所述侧入光面接收的光线并产生面光线的反光面；
    用于发射所述面光线的出光面；以及
    用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面的侧补光面；
    其特征在于：
    所述侧补光面上设置有荧光粉，所述荧光粉受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色；
    所述荧光粉掺杂于所述侧补光面的本体内；
    所述侧补光面上设置有至少一个棱角。
  2. 一种导光板，包括：
    用于接收光线的侧入光面；
    用于反射所述侧入光面接收的光线并产生面光线的反光面；
    用于发射所述面光线的出光面；以及
    用于反射所述侧入光面和所述反光面的光线，并对立于所述侧入光面的侧补光面；
    其特征在于：
    所述侧补光面上设置有荧光粉，所述荧光粉受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色。
  3. 根据权利要求2所述的导光板，其特征在于，所述荧光粉掺杂于所述侧补光面的本体内。
  4. 根据权利要求2所述的导光板，其特征在于，所述侧补光面贴有涂覆所述荧光粉的透光薄膜。
  5. 根据权利要求2所述的导光板，其特征在于，所述侧补光面贴有掺杂所述荧光粉的透光薄膜。
  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，所述侧补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，所述导光板为具微结构的甲基丙烯酸甲酯/苯乙烯共聚合物导光板。
  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. 一种背光模块，包括：
    用以产生光线的光源；以及
    导光板，包括：
    用于接收所述光源产生的光线的侧入光面；
    用于反射所述侧入光面接收的光线并产生面光线的反光面；
    用于发射所述面光线的出光面；及
    用于反射所述侧入光面和所述反光面的光线，并对立于远离所述侧入光面的侧补光面；
    其特征在于，所述侧补光面上设置有荧光粉，受所述光线激发而产生补偿光，以调整所述出光面发射的面光线的颜色。
  12. 根据权利要求11所述的背光模块，其特征在于，所述荧光粉掺杂于所述侧补光面的本体内。
  13. 根据权利要求11所述的背光模块，其特征在于，所述侧补光面贴有涂覆所述荧光粉的透光薄膜。
  14. 根据权利要求11所述的背光模块，其特征在于，所述侧补光面贴有掺杂所述荧光粉的透光薄膜。
  15. 根据权利要求11所述的背光模块，其特征在于，所述侧补光面上设置有至少一个棱角。
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