WO2015027528A1 - 适用于背光模组的荧光粉光学膜片的筛选方法及背光模组 - Google Patents

适用于背光模组的荧光粉光学膜片的筛选方法及背光模组 Download PDF

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Publication number
WO2015027528A1
WO2015027528A1 PCT/CN2013/082938 CN2013082938W WO2015027528A1 WO 2015027528 A1 WO2015027528 A1 WO 2015027528A1 CN 2013082938 W CN2013082938 W CN 2013082938W WO 2015027528 A1 WO2015027528 A1 WO 2015027528A1
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Prior art keywords
optical film
phosphor optical
backlight module
light
screening method
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PCT/CN2013/082938
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English (en)
French (fr)
Inventor
贺虎
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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 JP2016537071A priority Critical patent/JP6216065B2/ja
Priority to US14/116,762 priority patent/US9025149B2/en
Priority to GB1600838.5A priority patent/GB2531202B/en
Priority to KR1020167001043A priority patent/KR101778900B1/ko
Priority to RU2016105820A priority patent/RU2633800C2/ru
Publication of WO2015027528A1 publication Critical patent/WO2015027528A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • 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
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the invention relates to a screening method and a backlight module for a phosphor optical film suitable for a backlight module.
  • the present invention relates to the field of liquid crystal display; and more particularly to a method for screening a phosphor optical film suitable for a backlight module and a backlight module. Background technique
  • the liquid crystal display mainly includes a liquid crystal panel and a backlight module.
  • the backlight module is disposed opposite to the liquid crystal panel, and the backlight module provides a display light source to the liquid crystal panel, so that the liquid crystal panel displays the image by the light provided by the backlight module.
  • the backlight module is mainly divided into a direct type backlight module and a side-in type backlight module.
  • the light source is the core, and its characteristics determine the display effect of the backlight module, such as brightness, chromaticity and color saturation (NTSC) of the backlight module.
  • the brightness of the backlight module can be adjusted by adjusting the luminous flux of the light source, the number of light sources, the driving mode of the light source, and the structure of the optical film used in the backlight module; the chromaticity of the backlight module can be determined by the spectrum and optical components of the light source.
  • the light transmission spectrum and color filter spectrum are matched to the standard color; the color saturation of the backlight module is used as an additional specification to distinguish high-grade models (ie high-grade liquid crystal displays) and low Graded models (ie low-grade liquid crystal displays), the color saturation specifications of backlight modules in common low-grade models are about 62% ⁇ 70%, and high-grade models require color saturation of their backlight modules. Degree is greater than 75%.
  • the uniformity of chromaticity in the surface of the backlight module is also to enhance the human visual perception of the liquid crystal display. For example, in the low-grade model, the in-plane color difference of the backlight module is required to be less than 0.010.
  • the side-lit backlight module includes a light guide plate 10 , a light source 20 disposed adjacent to the light incident surface of the light guide plate 10 , and a phosphor optical film 30 disposed on the light exit surface of the light guide plate 10 ;
  • the light source 20 uses a blue light emitting diode (LED), and the phosphor optical film 30 converts part of the blue light emitted by the light source 20 into red light, green light, and then another portion of the blue light that is not converted and the red light and green formed by the conversion. After the light is mixed, white light is formed as a backlight source of the backlight module.
  • LED blue light emitting diode
  • the backlight module shown in FIG. 1 can be optimally matched with the color filter in the liquid crystal panel, and can achieve higher color saturation and transmittance.
  • the materials used in the light guide plate usually polymethyl methacrylate (PMMA), MS, etc.
  • PMMA polymethyl methacrylate
  • MS MS, etc.
  • the light guide plate absorbs the blue light more clearly, so that the light guide plate is away from the light source.
  • the chromaticity of the direction is gradually increased, which seriously affects the chromaticity uniformity in the plane of the backlight module. Summary of the invention
  • an object of the present invention is to provide a screening method for a phosphor optical film suitable for a backlight module, the screening method comprising the steps of: a) not matching a phosphor optical film
  • the backlight module of the film is divided into a plurality of measurement areas in the plane, and the light transmission spectrum of each measurement area is obtained; b) obtaining the chromaticity value of each measurement area with the phosphor optical film; c) judging step b Whether the chromaticity value of each measurement zone obtained with the phosphor optical film is within the standard chromaticity range; if the chromaticity value of each measurement zone with the phosphor optical film is in the standard chromaticity In the range, the screening of the phosphor optical film is completed; if the chromaticity value of at least one measurement area with the phosphor optical film is not within the standard chromaticity range, the at least one measurement area is matched with a new one.
  • step b) further includes: bl) obtaining a light transmission spectrum of the phosphor optical film matched with each measurement area; b2) obtaining a light transmission spectrum after each measurement area is matched with the phosphor optical film; b3 Based on the light transmission spectrum obtained in step b2), the chromaticity value after each measurement zone is matched with the phosphor optical film is obtained.
  • the phosphor optical film associated with each measurement zone has different fabrication parameters.
  • the phosphor optical film is a quantum dot film.
  • Another object of the present invention is to provide a screening method for a phosphor optical film suitable for a backlight module, the screening method comprising the steps of: a) in-plane of a backlight module not matched with a phosphor optical film Dividing into a plurality of measurement zones, and obtaining a light transmission spectrum of each measurement zone; b) obtaining a light transmission spectrum of the nth phosphor optical film, wherein n is a positive integer; c) obtaining the mth measurement zone The light transmission spectrum after the nth phosphor optical film, wherein m is a positive integer; d) based on the light transmission spectrum obtained in step c), the mth measurement area is matched with the nth phosphor optical film The latter chromaticity value; e) determining whether the chromaticity value of the mth measurement area obtained in step d) is matched with the nth phosphor optical film is within the standard chromaticity range ⁇ 'if the mth measurement area If
  • the phosphor optical film is a quantum dot film.
  • each phosphor optical film has different fabrication parameters.
  • Still another object of the present invention is to provide a backlight module, the backlight module includes a light source and a light guide plate, and the light guide plate includes a light incident surface and a light exit surface, and the light source is adjacent to the light incident surface.
  • the backlight module further includes a phosphor optical film that is screened according to the screening method described above, and the phosphor optical film is disposed on the light emitting surface.
  • the phosphor optical film is a quantum dot film.
  • the phosphor optical film is disposed on the light-emitting surface by printing or spraying.
  • the phosphor optical film can finally convert the light emitted by the light source into white light, it can be used as a backlight source of the backlight module.
  • the phosphor optical film corresponds to different regions of different measurement areas of the backlight module. With different manufacturing parameters, the phosphor optical film and the backlight module are highly matched, so that the backlight module has better chroma uniformity and transmittance while having better chroma uniformity.
  • FIG. 1 is a schematic diagram of a backlight module capable of improving color saturation in the prior art.
  • FIG. 2 is a flow chart showing a screening method of a phosphor optical film suitable for a backlight module according to Embodiment 1 of the present invention.
  • Figure 3 is a schematic illustration of one embodiment of a divided measurement zone of the present invention.
  • FIG. 4 is a flow chart showing a method of screening a phosphor optical film suitable for a backlight module according to Embodiment 2 of the present invention.
  • Figure 5 is a schematic illustration of a backlight module of the present invention. detailed description
  • Example 1 The embodiments of the present invention are now described in detail, and in the accompanying drawings, The embodiments are described below to explain the present invention by referring to the figures.
  • the thickness of layers and regions may be exaggerated for clarity.
  • unnecessary details of well-known structures and/or functions may be omitted in order to avoid obscuring the inventive concept of the present invention.
  • FIG. 2 is a flow chart showing a screening method of a phosphor optical film suitable for a backlight module according to Embodiment 1 of the present invention.
  • the screening method according to an embodiment of the present invention includes the following steps:
  • the backlight module not matched with the phosphor optical film is divided into a plurality of measurement areas, and the light transmission spectrum of each measurement area is obtained.
  • the plurality of measurement areas in the surface of the backlight module can be sequentially divided into the first measurement area A1, the second measurement area A2, and the direction from the side of the backlight module to the side away from the side. ..., the m measurement area Am, ... and the like, but the division of the plurality of measurement areas in the surface of the backlight module of the present invention is not limited to that shown in FIG.
  • the light transmission spectrum refers to the light transmittance corresponding to each wavelength in the visible light band.
  • an optical measuring device such as a spectroradiometer, a color analyzer, etc.
  • an optical measuring device can be used to measure and collect the chromaticity values of the plurality of measurement areas in the surface of the backlight module not matched with the phosphor optical film, and establish the unmatched a chromaticity matrix of a plurality of measurement areas in a surface of the backlight module of the phosphor optical film, the chromaticity matrix including chromaticity values of each measurement area, from which the measurement of each surface of the backlight module can be seen
  • the difference in the chromaticity values of the regions, and whether the chromaticity values of the respective measurement regions are within the standard chromaticity range, the standard chromaticity range will be explained below.
  • the standard chromaticity range refers to the standard chromaticity ⁇ chromaticity tolerance, wherein, in practice, the backlight modules have different sizes, so the standard chromaticity range is according to different size backlight modules. And different.
  • step S3 if the chromaticity values of each measurement area with the phosphor optical film are within the standard chromaticity range, the screening of the phosphor optical film suitable for the backlight module is completed, where It should be noted that, since the chromaticity values of the respective measurement areas in the surface of the backlight module are different, the fabrication parameters of the phosphor optical film (such as the composition, ratio, and concentration of the phosphor) of each measurement area are Differently, the manufacturing parameters of the respective regions of the phosphor optical film suitable for the backlight module which are made according to the parameters of the phosphor optical film corresponding to each of the measurement regions are different, and each The area corresponds to each measurement area; if at least one measurement area is matched with the phosphor optical film, the chromaticity value is not within the standard chromaticity range, then the at least one measurement area is matched with a new phosphor optical film (here The new phosphor optical film has a fabrication parameter that is different from the fabrication parameters of the phosphor optical film that
  • step S1 multiplying the transmittance corresponding to each wavelength in the light transmission spectrum of each measurement region obtained in step S1 by the transmittance corresponding to each wavelength in the light transmission spectrum of the phosphor optical film, Further, a light transmission spectrum after each measurement zone is matched with the phosphor optical film is obtained.
  • the chromaticity value of each measurement zone matched with the optical film of the powder is obtained.
  • this step by multiplying the transmittance corresponding to each wavelength in the light transmission spectrum of each measurement area with the phosphor optical film and the viewing function (ie, the visual value corresponding to the different wavelength)
  • the color tristimulus value is integrated in the visible light band, and the chromaticity value after matching the phosphor optical film in each measurement area is obtained according to the obtained color tristimulus value.
  • This embodiment refers to the chromaticity value under the CIE1931 standard.
  • the present invention is not limited thereto, and may be a chromaticity value under other standards such as CIE1976 and the like.
  • the phosphor optical film is preferably a quantum. Point the film.
  • FIG. 4 is a flow chart showing a method of screening a phosphor optical film suitable for a backlight module according to Embodiment 2 of the present invention.
  • the screening method according to an embodiment of the present invention includes the following steps:
  • the backlight module not matched with the phosphor optical film is divided into a plurality of measurement areas, and the light transmission spectrum of each measurement area is obtained.
  • the plurality of measurement areas in the surface of the backlight module can be sequentially divided into the first measurement area A1, the second measurement area A2, and the direction from the side of the backlight module to the side away from the side. ..., the m measurement area Am, ... and the like, but the division of the plurality of measurement areas in the surface of the backlight module of the present invention is not limited to that shown in FIG.
  • the light transmission spectrum refers to the light transmittance corresponding to each wavelength in the visible light band.
  • an optical measuring device such as a spectroradiometer, a color analyzer, etc.
  • an optical measuring device can be used to measure and collect the chromaticity values of the plurality of measurement areas in the surface of the backlight module not matched with the phosphor optical film, and establish the unmatched a chromaticity matrix of a plurality of measurement areas in a surface of the backlight module of the phosphor optical film, the chromaticity matrix including chromaticity values of each measurement area, from which the measurement of each surface of the backlight module can be seen
  • S2 obtaining a light transmission spectrum of the nth phosphor optical film, wherein n is a positive integer.
  • step S4 Based on the light transmission spectrum of the mth measurement area obtained in step S3 and the nth phosphor optical film, the chromaticity value of the mth measurement area matched with the nth phosphor optical film is obtained.
  • the transmittance corresponding to each wavelength in the light transmission spectrum after the mth measurement area is matched with the nth phosphor optical film and the viewing function (ie, the visual value corresponding to the different wavelength)
  • the color tristimulus value is integrated in the visible light band, and the chromaticity value of the mth measurement area matched with the nth phosphor optical film is obtained according to the obtained color tristimulus value
  • the embodiment refers to The chromaticity value under the CIE 1931 standard, but the present invention is not limited thereto, and may be a chromaticity value under other standards (such as CIE 1976, etc.).
  • the standard chromaticity range refers to the standard chromaticity chromaticity tolerance, wherein, in practice, the backlight modules have different sizes, so the standard chromaticity range is according to different size backlight modules. And different.
  • the fabrication parameters of the phosphor optical film of each measurement area such as the composition of the phosphor, The ratios and concentrations are different.
  • the phosphor optical film is preferably a quantum. Point the film.
  • the present invention also provides a backlight module having a phosphor optical film produced by the above-described screening method according to the first embodiment or the second embodiment.
  • a backlight module having a phosphor optical film produced by the above-described screening method according to the first embodiment or the second embodiment.
  • Fig. 5 please refer to Fig. 5.
  • the backlight module 100 includes a light source (such as a blue light emitting diode) 200 and a light guide.
  • the light guide plate 300 includes a light incident surface 301 and a light exiting surface 302.
  • the light source 200 is disposed adjacent to the light incident surface 301, and the phosphor optical is selected according to the screening method described in Embodiment 1 or Embodiment 2 above.
  • the diaphragm 400 can be disposed on the light exit surface 302, for example, by printing or spraying.
  • the phosphor optical film is preferably a quantum dot film. sheet.
  • the phosphor optical film 400 can finally convert the light emitted by the light source 200 into white light, it can be used as a backlight source of the backlight module, and as described in Embodiment 1 or Embodiment 2, the phosphor optical film 400 corresponds to Different areas of different measurement areas (display areas) of the backlight module have different fabrication parameters, so the phosphor optical film 400 and the backlight module are highly matched, so that the backlight module has high color saturation and wear.
  • the permeability has good chromaticity uniformity at the same time.

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Abstract

一种适用于背光模组的荧光粉光学膜片的筛选方法及背光模组。该背光模组包括光源与导光板，所述导光板包括一入光面和一出光面，出光面上设置荧光粉光学膜片。该筛选方法包括步骤：a）将未搭配荧光粉光学膜片（30）的背光模组面内划分成多个测量区，并获取每个测量区的透光光谱；b）获取每个测量区搭配荧光粉光学膜片（30）后的色度值；c）判断步骤b）中得到的每个测量区搭配荧光粉光学膜片后的色度值是否在标准色度范围内；若每个测量区搭配荧光粉光学膜片后的色度值均在所述标准色度范围内，则完成所述荧光粉光学膜片的筛选；若至少一个测量区搭配荧光粉光学膜片（30）后的色度值不在所述标准色度范围内，则对该至少一个测量区搭配新的荧光粉光学膜片（30），并返回步骤b）。具有上述荧光粉光学膜片的背光模组在具有较高的色饱和度及穿透率的同时具有较好的色度均匀性。

Description

说 明 书 适用于背光模组的荧光粉光学膜片的筛选方法及背光模组 技术领域
本发明涉及液晶显示领域； 更具体地讲， 涉及一种适用于背光模组的荧光 粉光学膜片的筛选方法及背光模组。 背景技术
液晶显示器（Liquid Crystal Display, LCD) 由于具有机身薄、 省电、 低辐 射、 画面柔和不伤眼等众多优点而得到越来越广泛的应用。 液晶显示器主要包 括液晶面板和背光模组， 其中， 背光模组与液晶面板相对设置， 并且背光模组 向液晶面板提供显示光源， 使得液晶面板借由背光模组提供的光而显示画面。
目前， 背光模组主要分为直下式背光模组和侧入式背光模组。 然而无论是 直下式背光模组还是侧入式背光模组， 光源作为核心， 其特性决定了背光模组 的显示效果， 例如背光模组的亮度、 色度及色饱和度 （NTSC) 等。 背光模组 的亮度可以通过调整光源的光通量、 光源的数量、 光源的驱动方式以及背光模 组中使用的光学膜片的架构来进行调节； 背光模组的色度则可由光源的光谱、 光学部材的透光光谱、 彩色滤光片光谱 （Color Filter Spectrum) 共同匹配达到 标准色度； 而背光模组的色饱和度作为一个附加规格主要是用于区别高品阶机 种 （即高品阶液晶显示器） 和低品阶机种 （即低品阶液晶显示器）， 常见的低 品阶机种中的背光模组的色饱和度规格大约为 62%〜70%， 高品阶机种则需要 其背光模组的色饱和度大于 75%。另外， 背光模组面内的色度均匀性也是提升 液晶显示器的人眼视觉感受， 例如在低品阶机种中要求背光模组面内色差小于 0.010。 图 1是现有技术的一种可提升色饱和度的侧入式背光模组的示意图。如图 1所示， 该侧入式背光模组包括导光板 10、 邻近于导光板 10的入光面设置的 光源 20以及设置于导光板 10的出光面上的荧光粉光学膜片 30; 其中， 光源 20采用蓝光发光二极管 （LED) , 而荧光粉光学膜片 30可将光源 20发出的部 分蓝光转换为红光、 绿光， 而后未被转换的另一部分蓝光和转换形成的红光、 绿光混合后形成白光来作为背光模组的背光光源。 与使用白光 LED作为背光 模组中的光源相比， 图 1所示的背光模组能够与液晶面板中的彩色滤光片 (Color Filter)做最佳化的匹配， 可以实现较高的色饱和度及穿透率。 然而由于 导光板所采用的材质（通常为聚甲基丙烯酸甲酯（PMMA)、 MS等） 以及导光 板上网点的存在， 使得导光板对于蓝光的吸收较为明显， 使得导光板的沿着远 离光源的方向的色度逐渐提高， 这严重影响到背光模组面内的色度均匀性。 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适用于背 光模组的荧光粉光学膜片的筛选方法， 所述筛选方法包括歩骤： a) 将未搭配 荧光粉光学膜片的背光模组面内划分成多个测量区， 并获取每个测量区的透光 光谱； b) 获取每个测量区搭配荧光粉光学膜片后的色度值； c ) 判断歩骤 b) 中得到的每个测量区搭配荧光粉光学膜片后的色度值是否在标准色度范围内； 若每个测量区搭配荧光粉光学膜片后的色度值均在所述标准色度范围内， 则完 成所述荧光粉光学膜片的筛选； 若至少一个测量区搭配荧光粉光学膜片后的色 度值不在所述标准色度范围内， 则对该至少一个测量区搭配新的荧光粉光学膜 片， 并返回歩骤 b)。
此外， 歩骤 b) 进一歩包括： bl ) 获取与每个测量区搭配的荧光粉光学膜 片的透光光谱； b2) 获得每个测量区搭配荧光粉光学膜片后的透光光谱； b3 ) 基于歩骤 b2)中获得的透光光谱，得到每个测量区搭配荧光粉光学膜片后的色 度值。
此外， 每个测量区搭配的荧光粉光学膜片具有不同的制作参数。
此外， 所述荧光粉光学膜片为量子点膜片。
本发明的另一目的还在于提供一种适用于背光模组的荧光粉光学膜片的 筛选方法， 所述筛选方法包括歩骤： a) 将未搭配荧光粉光学膜片的背光模组 面内划分成多个测量区， 并获取每个测量区的透光光谱； b ) 获取第 n个荧光 粉光学膜片的透光光谱， 其中， n为正整数； c ) 获得第 m个测量区搭配第 n 个荧光粉光学膜片后的透光光谱， 其中， m为正整数； d)基于歩骤 c ) 中获得 的透光光谱， 得到第 m个测量区搭配第 n个荧光粉光学膜片后的色度值； e ) 判断歩骤 d)中获得的第 m个测量区搭配第 n个荧光粉光学膜片后的色度值是 否在标准色度范围内 ·'若第 m个测量区搭配第 n个荧光粉光学膜片后的色度值 不在标准色度范围内， 则返回歩骤 b)， 并使歩骤 b) 中的 n=n+l ; 若第 m个测 量区搭配第 n个荧光粉光学膜片后的色度值在标准色度范围内， 则返回歩骤 c)， 并使歩骤 c) 中的 m=m+l。
此外， 所述荧光粉光学膜片为量子点膜片。
此外， 每个荧光粉光学膜片具有不同的制作参数。
本发明的又一目的又在于提供一种背光模组， 所述背光模组包括光源与导 光板，所述导光板包括一入光面和一出光面，所述光源邻近于所述入光面设置， 其中， 所述背光模组还包括根据以上所述的筛选方法筛选的荧光粉光学膜片， 所述荧光粉光学膜片设置于所述出光面上。
此外， 所述荧光粉光学膜片为量子点膜片。
此外， 所述荧光粉光学膜片通过印刷或喷涂的方式设置于所述出光面上。 本发明由于荧光粉光学膜片能够将光源发出的光最终转换为白光， 因而可 用做背光模组的背光光源， 此外， 该荧光粉光学膜片对应于背光模组不同的测 量区的不同区域是具有不同的制作参数， 因此该荧光粉光学膜片与背光模组高 度匹配， 使得背光模组在具有较高的色饱和度及穿透率的同时具有较好的色度 均匀性。 附图说明
图 1是现有技术的一种可提升色饱和度的背光模组的示意图。
图 2是根据本发明的实施例 1的适用于背光模组的荧光粉光学膜片的筛选 方法流程图。
图 3是本发明的划分测量区的一种实施方式的示意图。
图 4是根据本发明的实施例 2的适用于背光模组的荧光粉光学膜片的筛选 方法流程图。 图 5是本发明的背光模组的示意图。 具体实施方式
现在对本发明的实施例进行详细的描述， 其示例表示在附图中， 其中，相 同的标号始终表示相同部件。下面通过参照附图对实施例进行描述以解释本发 明。 在附图中， 为了清晰起见， 可以夸大层和区域的厚度。 在下面的描述中， 为了避免公知结构和 /或功能的不必要的详细描述所导致的本发明构思的混淆， 可省略公知结构和 /或功能的不必要的详细描述。 实施例 1
图 2是根据本发明的实施例 1的适用于背光模组的荧光粉光学膜片的筛选 方法流程图。
如图 2所示， 根据本发明的实施例的筛选方法包括歩骤：
S1 : 将未搭配荧光粉光学膜片的背光模组面内划分成多个测量区， 并获取 每个测量区的透光光谱。 在该歩骤中， 背光模组面内的多个测量区可按照从背 光模组的一侧到远离该一侧的方向依次划分为第一个测量区 Al、 第二个测量 区 A2、……、 第 m个测量区 Am、……等多个测量区， 但本发明在背光模组面 内的多个测量区的划分并不以图 3所示为限。 在本实施例中， 透光光谱指的是 在可见光波段内每一波长对应的透光率。 此外， 可利用光学测量装置（诸如分 光辐射亮度计、 色彩分析仪等）测量并采集未搭配荧光粉光学膜片的背光模组 面内的多个测量区的色度值， 并建立该未搭配荧光粉光学膜片的背光模组面内 的多个测量区的色度矩阵， 该色度矩阵包括每个测量区的色度值， 从该色度矩 阵可以看出背光模组面内各个测量区的色度值差异， 以及各个测量区的色度值 是否在标准色度范围内， 标准色度范围将在下面说明。
S2: 获取每个测量区搭配荧光粉光学膜片后的色度值。
S3： 判断歩骤 S2中得到的每个测量区搭配荧光粉光学膜片后的色度值是 否在标准色度范围内。 在本实施例中， 标准色度范围指的是标准色度±色度公 差， 其中， 由于在实际中， 背光模组具有不同的尺寸大小， 因此标准色度范围 根据不同尺寸大小的背光模组而不同。
在歩骤 S3中， 如果每个测量区搭配荧光粉光学膜片后的色度值均在标准 色度范围内， 则完成了适用于背光模组的荧光粉光学膜片的筛选， 此处， 需要 说明的是， 由于背光模组面内的各个测量区的色度值均存在差异， 因此搭配每 个测量区的荧光粉光学膜片的制作参数 （诸如荧光粉的成分、 比例、 浓度）是 各不相同的， 由此， 根据筛选的对应每个测量区的荧光粉光学膜片的参数制作 的适用于该背光模组的荧光粉光学膜片的各个区域的制作参数是不相同的， 各 个区域对应匹配各个测量区； 如果至少有一个测量区搭配荧光粉光学膜片后的 色度值不在所述标准色度范围内， 则对该至少一个测量区搭配新的荧光粉光学 膜片（这里的新的荧光粉光学膜片具有的制作参数是不同于该至少一个测量区 之前搭配的荧光粉光学膜片的制作参数）， 并返回歩骤 S2。 歩骤 S2进一歩包括歩骤：
521 ) 获取与每个测量区对应搭配的荧光粉光学膜片的透光光谱。
522)将歩骤 S1中得到的每个测量区的透光光谱中的每一波长对应的透光 率与荧光粉光学膜片的透光光谱中的每一波长对应的透光率相乘， 进而获得每 个测量区搭配荧光粉光学膜片后的透光光谱。
523 ) 基于歩骤 S22) 中获得的每个测量区搭配荧光粉光学膜片后的透光 光谱， 得到每个测量区搭配光粉光学膜片后的色度值。 在该歩骤中， 通过将每 个测量区搭配荧光粉光学膜片后的透光光谱中的每一波长对应的透光率与视 见函数（即不同波长对应的明视觉值）相乘后在可见光波段内积分得到颜色三 刺激值， 根据得到的颜色三刺激值进而获得每个测量区搭配荧光粉光学膜片后 的色度值，本实施例指的是在 CIE1931标准下的色度值，但本发明并不限于此， 也可以是在其他标准 （诸如 CIE1976等） 下的色度值。
此外， 由于量子点具有激发光谱宽且连续分布， 而发射光谱窄而对称，颜 色可调， 光化学稳定性高， 荧光寿命长等优点， 因此在本实施例中， 荧光粉光 学膜片优选为量子点膜片。
实施例 2
图 4是根据本发明的实施例 2的适用于背光模组的荧光粉光学膜片的筛选 方法流程图。
如图 4所示， 根据本发明的实施例的筛选方法包括歩骤：
S1 : 将未搭配荧光粉光学膜片的背光模组面内划分成多个测量区， 并获取 每个测量区的透光光谱。 在该歩骤中， 背光模组面内的多个测量区可按照从背 光模组的一侧到远离该一侧的方向依次划分为第一个测量区 Al、 第二个测量 区 A2、……、 第 m个测量区 Am、……等多个测量区， 但本发明在背光模组面 内的多个测量区的划分并不以图 3所示为限。 在本实施例中， 透光光谱指的是 在可见光波段内每一波长对应的透光率。 此外， 可利用光学测量装置（诸如分 光辐射亮度计、 色彩分析仪等）测量并采集未搭配荧光粉光学膜片的背光模组 面内的多个测量区的色度值， 并建立该未搭配荧光粉光学膜片的背光模组面内 的多个测量区的色度矩阵， 该色度矩阵包括每个测量区的色度值， 从该色度矩 阵可以看出背光模组面内各个测量区的色度值差异， 以及各个测量区的色度值 是否在标准色度范围内， 标准色度范围将在下面说明。 S2: 获取第 n个荧光粉光学膜片的透光光谱， 其中， n为正整数。
S3： 将第 m个测量区的透光光谱中每一波长对应的透光率与第 n个荧光 粉光学膜片的透光光谱中每一波长对应的透光率相乘，进而获得第 m个测量区 搭配第 n个荧光粉光学膜片后的透光光谱， 其中， m为正整数。
S4: 基于歩骤 S3中获得的第 m个测量区搭配第 n个荧光粉光学膜片后的 透光光谱，得到第 m个测量区搭配第 n个荧光粉光学膜片后的色度值。在该歩 骤中，通过将第 m个测量区搭配第 n个荧光粉光学膜片后的透光光谱中每一波 长对应的透光率与视见函数（即不同波长对应的明视觉值）相乘后在可见光波 段内积分得到颜色三刺激值，根据得到的颜色三刺激值进而获得第 m个测量区 搭配第 n个荧光粉光学膜片后的色度值，本实施例指的是在 CIE1931标准下的 色度值， 但本发明并不限于此， 也可以是在其他标准（诸如 CIE1976等）下的 色度值。
S5: 判断歩骤 S4中获得的第 m个测量区搭配第 n个荧光粉光学膜片后的 色度值是否在标准色度范围内。 在本实施例中， 标准色度范围指的是标准色度 士色度公差， 其中， 由于在实际中， 背光模组具有不同的尺寸大小， 因此标准 色度范围根据不同尺寸大小的背光模组而不同。
在歩骤 S5中， 如果第 m个测量区搭配第 n个荧光粉光学膜片后的色度值 不在标准色度范围内， 则返回歩骤 S2， 并使歩骤 S2中的 n=n+l， 此处， 需要 说明的是， 由于背光模组面内的各个测量区的色度值均存在差异， 因此搭配每 个测量区的荧光粉光学膜片的制作参数 （诸如荧光粉的成分、 比例、 浓度）是 各不相同的， 由此， 根据筛选的参数制作的荧光粉光学膜片的各个区域的制作 参数是不相同的， 各个区域对应匹配各个测量区； 如果第 m个测量区搭配第 n 个荧光粉光学膜片后的色度值在标准色度范围内， 则返回歩骤 S3， 并使歩骤 S3中的 m=m+l。
此外， 由于量子点具有激发光谱宽且连续分布， 而发射光谱窄而对称，颜 色可调， 光化学稳定性高， 荧光寿命长等优点， 因此在本实施例中， 荧光粉光 学膜片优选为量子点膜片。
本发明还提供了一种具有利用上述的实施例 1或实施例 2所述的筛选方法 制作的荧光粉光学膜片的背光模组， 具体请参照图 5。
如图 5所示， 背光模组 100包括光源 （诸如蓝色发光二极管） 200与导光 板 300， 其中， 导光板 300包括一入光面 301和一出光面 302， 光源 200邻近 于入光面 301设置， 根据上述的实施例 1或实施例 2所述的筛选方法筛选的荧 光粉光学膜片 400可例如通过印刷或喷涂等方式设置于出光面 302上。
由于量子点具有激发光谱宽且连续分布，而发射光谱窄而对称，颜色可调， 光化学稳定性高， 荧光寿命长等优点， 因此在本实施例中， 荧光粉光学膜片优 选为量子点膜片。
由于荧光粉光学膜片 400能够将光源 200发出的光最终转换为白光， 因而 可用做背光模组的背光光源， 并且如实施例 1或实施例 2所述， 该荧光粉光学 膜片 400对应于背光模组不同的测量区 （显示区域） 的不同区域是具有不同的 制作参数， 因此该荧光粉光学膜片 400与背光模组高度匹配， 使得背光模组在 具有较高的色饱和度及穿透率的同时具有较好的色度均匀性。
尽管已经参照其示例性实施例具体显示和描述了本发明，但是本领域的技 术人员应该理解， 在不脱离权利要求所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上的各种改变。

Claims

权利要求书
1、 一种适用于背光模组的荧光粉光学膜片的筛选方法， 其中， 所述筛选 方法包括歩骤：
a) 将未搭配荧光粉光学膜片的背光模组面内划分成多个测量区， 并获取 每个测量区的透光光谱；
b) 获取每个测量区搭配荧光粉光学膜片后的色度值；
c)判断歩骤 b)中得到的每个测量区搭配荧光粉光学膜片后的色度值是否 在标准色度范围内；
若每个测量区搭配荧光粉光学膜片后的色度值均在所述标准色度范围内， 则完成所述荧光粉光学膜片的筛选；
若至少一个测量区搭配荧光粉光学膜片后的色度值不在所述标准色度范 围内， 则对该至少一个测量区搭配新的荧光粉光学膜片， 并返回歩骤 b)。
2、 根据权利要求 1所述的筛选方法， 其中， 歩骤 b) 进一歩包括： bl ) 获取与每个测量区搭配的荧光粉光学膜片的透光光谱；
b2) 获得每个测量区搭配荧光粉光学膜片后的透光光谱；
b3 )基于歩骤 b2)中获得的透光光谱， 得到每个测量区搭配荧光粉光学膜 片后的色度值。
3、 根据权利要求 1所述的筛选方法， 其中 4SA、: I量区搭配的荧光粉光 学膜片具有不同的制作参数。
4、 根据权利要求 2所述的筛选方法， 其中 水、: I量区搭配的荧光粉光 学膜片具有不同的制作参数。
5、 根据权利要求 1所述的筛选方法， 其中 所述 ί光粉光学膜片为量子 点膜片。
6、 根据权利要求 2所述的筛选方法， 其中 所述 ί光粉光学膜片为量子 点膜片。
7、 根据权利要求 3所述的筛选方法， 其中 所述 ί光粉光学膜片为量子 点膜片。
8、 根据权利要求 4所述的筛选方法， 其中 所述 ί光粉光学膜片为量子 点膜片。
9、 一种适用于背光模组的荧光粉光学膜片的筛选方法， 其中， 所述筛选 方法包括歩骤：
a) 将未搭配荧光粉光学膜片的背光模组面内划分成多个测量区， 并获取 每个测量区的透光光谱；
b) 获取第 n个荧光粉光学膜片的透光光谱， 其中， n为正整数； c) 获得第 m个测量区搭配第 n个荧光粉光学膜片后的透光光谱， 其中， m为正整数；
d) 基于歩骤 c) 中获得的透光光谱， 得到第 m个测量区搭配第 n个荧光 粉光学膜片后的色度值；
e) 判断歩骤 d) 中获得的第 m个测量区搭配第 n个荧光粉光学膜片后的 色度值是否在标准色度范围内；
若第 m个测量区搭配第 n个荧光粉光学膜片后的色度值不在标准色度范围 内， 则返回歩骤 b)， 并使歩骤 b ) 中的 n=n+l ;
若第 m个测量区搭配第 n个荧光粉光学膜片后的色度值在标准色度范围 内， 则返回歩骤 c)， 并使歩骤 c) 中的 m=m+l。
10、 根据权利要求 9所述的筛选方法， 其中， 所述荧光粉光学膜片为量子 点膜片。
11、 根据权利要求 9所述的筛选方法， 其中， 每个荧光粉光学膜片具有不 同的制作参数。
12、 根据权利要求 10所述的筛选方法， 其中， 每个荧光粉光学膜片具有 不同的制作参数。
13、 一种背光模组， 其包括光源与导光板， 所述导光板包括一入光面和一 出光面， 所述光源邻近于所述入光面设置， 其中， 所述背光模组还包括根据权 利要求 1或 9所述的筛选方法筛选的荧光粉光学膜片，所述荧光粉光学膜片设 置于所述出光面上。
14、 根据权利要求 13所述的背光模组， 其中， 所述荧光粉光学膜片为量 子点膜片。
15、 根据权利要求 13所述的背光模组， 其中， 所述荧光粉光学膜片通过 印刷或喷涂的方式设置于所述出光面上。
16、 根据权利要求 14所述的背光模组， 其中， 所述荧光粉光学膜片通过 印刷或喷涂的方式设置于所述出光面上。
PCT/CN2013/082938 2013-09-02 2013-09-04 适用于背光模组的荧光粉光学膜片的筛选方法及背光模组 WO2015027528A1 (zh)

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