CN108897170A - A kind of color converts the liquid crystal module of film and its composition - Google Patents

A kind of color converts the liquid crystal module of film and its composition Download PDF

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CN108897170A
CN108897170A CN201810833405.1A CN201810833405A CN108897170A CN 108897170 A CN108897170 A CN 108897170A CN 201810833405 A CN201810833405 A CN 201810833405A CN 108897170 A CN108897170 A CN 108897170A
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light
color
spectrum
film
grid
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CN108897170B (en
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黄炳乐
沈俊慧
张永志
陈明
任慧
朱其祥
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Fuzhou Jinweihang Information Technology Co ltd
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Fujian Chuanzheng Communications College
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    • 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
    • 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
    • G02F1/133624—Illuminating devices characterised by their spectral emissions

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

Abstract

The present invention relates to a kind of color conversion film and its liquid crystal modules of composition.Including a substrate, it is dispersed with the grid closely arranged above it, and it is one group with three grid and is periodically respectively embedded into or coats blue, green and red spectrum transition material on grid, these materials include using quanta point material as optimal selection, after being embedded in or having coated color-converting material, upper substrate is covered again after coating transparent UV glue on substrate, forms complete color conversion color film；Color conversion film is that excitation purity, light efficiency and gamut area can be improved under the cooperation of color filter film traditional in liquid crystal display device.The present invention is applied to that its light efficiency can be improved in liquid crystal display, promote colour purity and improve gamut area.

Description

A kind of color converts the liquid crystal module of film and its composition
Technical field
The present invention relates to a kind of color conversion film and its liquid crystal modules of composition.
Background technique
Using the colorization technology of color conversion regime in liquid crystal display, organic el display, liquid phase display technology, photograph Application in bright etc. is just extensively studied.The conversion of so-called color is that will to be converted to wavelength under the light issued from light source longer Light, such as indicate that green, emitting red light light source will be converted under the shorter blue-light source of wavelength.By that will have color conversion The composition of function is made film and combines with such as blue-light source, passes through conversion film so as to realize from single blue-light source Output blue, green, these three red primary colors simultaneously, that is, realize the output for capableing of white light.By the way that above-mentioned blue light will be combined White light source obtained from source and film with color conversion function is as light source unit and by the light source unit and liquid crystal drive Partially, color filter film combines, and can make full color display.In addition, can be directly used as if there is no liquid crystal drive part White light source, such as the white light source that can be used as LED illumination etc..
The light source of backlight is developed to from the past twenties years cold-cathode fluorescence lamps (CCFL) and is converted with fluorescent powder White light-emitting diodes (1pc-WLED).1pc-WLED is to excite YAG with blue-ray LED:Ce3+ yellow fluorescent powder generates white light. The remarkable advantage of 1pc-WLED is long-life, low cost and is easily assembled.Nevertheless, its wide yellow spectrum cause it is narrow Colour gamut, colour gamut only have 75%NTSC, its maximum transmitted efficiency (TE) in 1931 colour space of International Commission on Illumination (CIE) It is 8.7%.Industry in order to promote gamut area, occur quantum dot in a backlight in the form of quantum dot enhancing film (QDEF) To apply.Its total colour gamut can achieve 115%NTSC in the CIE1931 colour space, but its maximum TE is remained in 9.7% or so, this numerical value is suitable with the efficiency of the 1p-WLED backlight constituted.
Application for a patent for invention CN108141939A discloses color conversion film and light source unit, display and photograph containing it Bright device, color conversion film only illustrate color conversion film and are constituted by two layers, one layer be luminous organic material color Conversion layer, in addition one layer is the transparent resin with certain oxygen transmission rate, and there is no the critical technical parameters to color conversion film Selection is explained, for example does not illustrate that the spatial distribution of the green converted out and red is that range is proper, is not also referred to The information such as arrangement architecture in color conversion layer out.
Application for a patent for invention CN107922835A discloses color shifting combination object, color conversion film and the back comprising it Light unit, display and illumination, application for a patent for invention CN107709516A disclose color shifting combination object, color conversion film with And light emitting device, liquid crystal display device and the lighting device of film are converted comprising the color, color described in the two patent applications turns Composition is changed although the description of the emission wavelength range of green and red illuminating material, but how it to specifically not choosing and select Take method to explain, therefore, it is impossible to according to this method be rapidly selected the efficient of colored color filter in matching liquid crystal module and The spectral combination scheme of wide colour gamut.
Application for a patent for invention CN104763949A discloses a kind of backlight module and display device, the backlight module packet It includes:Light guide plate, the monochromatic source of light guide plate incident side, the quantum contact plate of the grating of light guide plate light-emitting surface, light guide plate light-emitting surface, institute It states quantum contact plate and the monochromatic light after diffraction is converted into white light.Its by light guide plate, grating, quantum dot plate mechanically It combines from level to level, not only assembling trouble, but also needs the grating and quantum contact plate film of large area, higher cost.
Utility model patent CN205404872U discloses a kind of grating type light guide plate based on quantum dot, the backlight mould Group need to change the traditional modular structure of principle, replace a upper novel light guide plate, this scheme is unfavorable in existing mould group It promotes and applies.
Method used by the invention patent only needs to increase by one layer of color conversion diaphragm, does not need in backlight module Other optical components are modified, while can quickly be matched to efficient and photochromic domain using optical electivity method of the invention Spectral combination scheme, therefore, the program is conducive to promote and apply in existing mould group.
Summary of the invention
The purpose of the present invention is to provide a kind of color conversion film and its liquid crystal modules of composition, it is intended to improve liquid crystal display The optical efficiency and increase gamut area of device.
To achieve the above object, the technical scheme is that：A kind of color conversion film, including close-packed arrays are grilled Middle layer, the upper layer for being respectively arranged on middle layer upper and lower, lower layer, the upper layer, lower layer by high transmittance transparent substrate structure At；The grid of the middle layer was to be transmissive to grid/insertion of the transparent region of blue light or coated with can emit blue light The grid of the blue region of primitive color light, insertion or grid and insertion coated with the green wavelength that can emit green primaries light Or the grid coated with the red light region that can emit primary red light is one group of periodic repeated arrangement, and transparent region Grid/blue region grid, the grid of green wavelength, red light region grid between by black barrier interval.
In an embodiment of the present invention, the grid of the transparent region, transparent filler are PET material or optical grade PMMA material；The material of the grid of the grid of blue region, the grid of green wavelength or red light region, insertion or coating is amount Son point fluorescent material, wherein blue region is blue quantum dot, green area is green quantum dot, and red area is amount of red Sub- point.
In an embodiment of the present invention, the lower layer, upper layer are made of PET material or optical grade PMMA material, Thickness range is between 0.05mm to 0.5mm；The thickness of the middle layer is between 1um to 10um.
In an embodiment of the present invention, the barrier size in middle layer between the size and grid of each grid is arranged in pairs or groups with corresponding The liquid crystal pixel of liquid crystal display and the light transmission part size of color filter film and barrier size be mutually matched.
The liquid crystal module that film is constituted is converted based on color described above the present invention also provides a kind of, the liquid crystal module For backlight using blue light as light source, light source obtains blue collimation plane uniform source of light after uniformly collimating, and turns through color It changes after film and appears blue light respectively, convert out the green light with blue light and convert out the feux rouges with blue light, while the color is converted Film and color filter film cooperate, and color is converted non-switched blue light in film and is filtered out；Wherein, the color converts film middle layer Grid with the grid of the grid of transparent region, the grid of green wavelength, red light region be one group of periodic repeated arrangement.
The liquid crystal module that film is constituted is converted based on color described above the present invention also provides a kind of, the liquid crystal module Backlight is using ultraviolet light as light source, and light source obtains ultraviolet collimation plane uniform source of light after uniformly collimating, and through color The blue light with ultraviolet light is converted out after conversion film respectively, the green light with ultraviolet light is converted out and converts out with ultraviolet light Feux rouges, while color conversion film and color filter film cooperate, and color is converted non-switched ultraviolet light in film and is filtered out；Its In, the grid of the color conversion film middle layer is with the grid of the grid of blue region, the grid of green wavelength, red light region One group of periodic repeated arrangement.
In an embodiment of the present invention, the material of the color conversion film is calculated by using wide colour gamut and high photosynthetic efficiency spectrum Method is chosen, to improve the gamut range and efficiency of liquid crystal display or lighting apparatus, specific wide colour gamut and high photosynthetic efficiency light Composing calculation method, steps are as follows：
Step S1, the blue and green light of film and the light of red light region are converted according to the color of the use in liquid crystal display device Transmitance is composed, the light source light spectrum that matches with the color filter film spectral transmittance in liquid crystal display device is selected, obtains several groups Spectroscopic data, and the following quantum dot spectrum Gauss curve fitting function of use calculates the spatial distribution data of every group of spectrum：
S (λ)=Aexp [- 2.773 (λ-λc)2/(Δλ)2] (1)
In formula, S (λ) indicates that quantum dot spectrum, A indicate spectrum peak, λcIndicate that spectral centroid wavelength, Δ λ indicate spectrum Halfwidth wavelength；
Step S2, the resulting every group of spatial distribution data of step S1 are converted into corresponding chromaticity coordinates, calculation formula respectively It is as follows：
In formula, S (λ) is the emission spectrum of backlight, then X, Y, Z are the tristimulus values of the backlight, For CIE1931 standard colorimetric observer's spectral tristimulus value curve, x, y and z are known as the chromaticity coordinates of CIE1931 colorimeter system；
Then, according to formula (4) calculate separately out every group of spectrum corresponding to colour gamut：
In formula, SrgbIndicate the area of colour triangle, xrAnd yrIt is the chromaticity coordinates of red primaries, xgAnd ygIt is the color of green primary color Coordinate, xbAnd ybIt is the chromaticity coordinates of blue primary；CGR indicates the ratio of colour gamut covering, AdisplayIndicate the colour gamut face of display device Product, AstandardIndicate the area of standard color gamut；
Step S3, the luminous energy ratio of three kinds of primary color spectras is calculated according to the requirement of the colour temperature of white balance to be achieved, so The light energy use efficiency of every group of spectrum is calculated further according to visual efficiency function afterwards, it is specific as follows：
The respective luminous intensity ratio of three kinds of primary color spectras is solved according to the mild three kinds of primary colors chromaticity coordinates of aim colour, is calculated public Formula is as follows：
In formula, (xw, yw, zw) be known reference white light source chromaticity coordinates, (xi, yi, zi| i=r, g, b) be respectively it is red, Green, blue three-color component chromaticity coordinates, (fi| i=r, g, b) be respectively three kinds of color components of red, green, blue ratio；
Then, radiance efficiency of the every group of spectrum under known reference white light source is calculated according to formula (6)：
In formula, LER is radiance efficiency, Pout(λ) is the power spectral density of the light source of total output light, and V (λ) is standard Luminosity function, while KmIt is under photopic conditions in the case where ideal monochrome 555nm light source, LER value is 6831m/ W；
The light energy use efficiency of each group of spectrum can be indicated with following formula：
In formula, Pout(λ) is the power spectral density of the light source of total output light, Pin(λ) is the power spectrum of the light source of total input light Density；
The total light energy use efficiency of every group of spectrum can be calculated with following formula：
TLE=LERTE (8)
In formula, TLE is the total light energy use efficiency of spectrum；
Step S4, coloring domain and the optimal spatial distribution combination of light energy use efficiency are chosen from every group of spectrum, as face Color converts the design spectroscopic data of film, selects suitable material as the light conversion material of color conversion film according to spectroscopic data.
In an embodiment of the present invention, in the step S1, selection and the color filter film spectrum in liquid crystal display device Transmitance matches light source light spectrum, i.e., the spectrum that the peak center wavelength of selected light source light spectrum falls in color filter film is maximum thoroughly Cross wave-length coverage corresponding to rate；In the step S4, coloring domain and optimal group of light energy use efficiency are chosen from every group of spectrum It closes, that is, refers to and colour gamut highest, light energy use efficiency highest or the optimum combination for taking into account the two are selected according to practical application.
In an embodiment of the present invention, the light source on color conversion film is incident on for collimation ultraviolet light, wherein ultraviolet photopeak It is worth central wavelength range from 325nm to 390nm, and spectrum halfwidth is 20nm and its hereinafter, the color converts the indigo plant on film The luminescent spectrum peak center wave-length coverage of color, green and red is respectively：445nm < λb< 460nm, 510nm < λg< 555nm, 630nm < λr< 685nm, luminescent spectrum halfwidth are 30nm and its following.
In an embodiment of the present invention, the light source on color conversion film is incident on as collimation blue light, blue peak center Wave-length coverage is from 445nm to 460nm, and spectrum halfwidth is 20nm and its hereinafter, the color converts green and red on film Luminescent spectrum peak center wavelength be respectively 510nm < λg< 555nm, 630nm < λr< 685nm, the half of luminescent spectrum are high Width is 30nm and its following.
Compared to the prior art, the invention has the advantages that：The present invention can be improved the light of liquid crystal display device It learns efficiency and increases gamut area.
Detailed description of the invention
Fig. 1 is that color converts film interlayer structure figure.
Fig. 2 is that color converts membrane structure figure.
Fig. 3 is the liquid crystal display die set that film is converted containing color.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
The present invention provides a kind of colors to convert film, including the grilled middle layer of close-packed arrays, is respectively arranged on middle layer The upper layer of upper and lower, lower layer, the upper layer, lower layer are made of the transparent substrate of high transmittance；The grid of the middle layer with It was transmissive to grid/insertion of the transparent region of blue light or the lattice coated with the blue region that can emit blue light primitive color light Son, insertion or the grid coated with the green wavelength that can emit green primaries light and insertion or coated with red can be emitted The grid of the red light region of primitive color light be one group of periodic repeated arrangement, and grid/blue region grid of transparent region, By black barrier interval between the grid of green wavelength, the grid of red light region.
The grid of the transparent region, transparent filler are PET material or optical grade PMMA material；Blue region The material of the grid of grid, the grid of green wavelength or red light region, insertion or coating is quantum dot fluorescence material, wherein Blue region is blue quantum dot, green area is green quantum dot, and red area is red quantum dot.
The lower layer, upper layer are made of PET material or optical grade PMMA material, and thickness range arrives for 0.05mm Between 0.5mm；The thickness of the middle layer is between 1um to 10um.Barrier in middle layer between the size and grid of each grid The light transmission part size and barrier size phase of wall size and the liquid crystal pixel of the liquid crystal display of corresponding collocation and color filter film Mutually matching.
The liquid crystal module that film is constituted is converted based on color described above the present invention also provides a kind of, the liquid crystal module For backlight using blue light as light source, light source obtains blue collimation plane uniform source of light after uniformly collimating, and turns through color It changes after film and appears blue light respectively, convert out the green light with blue light and convert out the feux rouges with blue light, while the color is converted Film and color filter film cooperate, and color is converted non-switched blue light in film and is filtered out；Wherein, the color converts film middle layer Grid with the grid of the grid of transparent region, the grid of green wavelength, red light region be one group of periodic repeated arrangement.
The liquid crystal module that film is constituted is converted based on color described above the present invention also provides a kind of, the liquid crystal module Backlight is using ultraviolet light as light source, and light source obtains ultraviolet collimation plane uniform source of light after uniformly collimating, and through color The blue light with ultraviolet light is converted out after conversion film respectively, the green light with ultraviolet light is converted out and converts out with ultraviolet light Feux rouges, while color conversion film and color filter film cooperate, and color is converted non-switched ultraviolet light in film and is filtered out；Its In, the grid of the color conversion film middle layer is with the grid of the grid of blue region, the grid of green wavelength, red light region One group of periodic repeated arrangement.
In the present invention, the material of the color conversion film is selected by using wide colour gamut and high photosynthetic efficiency spectrum calculation method It takes, to improve the gamut range and efficiency of liquid crystal display or lighting apparatus, specific wide colour gamut and high photosynthetic efficiency spectrum calculating side Steps are as follows for method：
Step S1, the blue and green light of film and the light of red light region are converted according to the color of the use in liquid crystal display device Transmitance is composed, the light source light spectrum that matches with the color filter film spectral transmittance in liquid crystal display device is selected, obtains several groups Spectroscopic data, and the following quantum dot spectrum Gauss curve fitting function of use calculates the spatial distribution data of every group of spectrum：
S (λ)=Aexp [- 2.773 (λ-λc)2/(Δλ)2] (1)
In formula, S (λ) indicates that quantum dot spectrum, A indicate spectrum peak, λcIndicate that spectral centroid wavelength, Δ λ indicate spectrum Halfwidth wavelength；
Step S2, the resulting every group of spatial distribution data of step S1 are converted into corresponding chromaticity coordinates, calculation formula respectively It is as follows：
In formula, S (λ) is the emission spectrum of backlight, then X, Y, Z are the tristimulus values of the backlight, For CIE1931 standard colorimetric observer's spectral tristimulus value curve, x, y and z are known as the chromaticity coordinates of CIE1931 colorimeter system；
Then, according to formula (4) calculate separately out every group of spectrum corresponding to colour gamut：
In formula, SrgbIndicate the area of colour triangle, xrAnd yrIt is the chromaticity coordinates of red primaries, xgAnd ygIt is the color of green primary color Coordinate, xbAnd ybIt is the chromaticity coordinates of blue primary；CGR indicates the ratio of colour gamut covering, AdisplayIndicate the colour gamut face of display device Product, AstandardIndicate the area of standard color gamut；
Step S3, the luminous energy ratio of three kinds of primary color spectras is calculated according to the requirement of the colour temperature of white balance to be achieved, so The light energy use efficiency of every group of spectrum is calculated further according to visual efficiency function afterwards, it is specific as follows：
The respective luminous intensity ratio of three kinds of primary color spectras is solved according to the mild three kinds of primary colors chromaticity coordinates of aim colour, is calculated public Formula is as follows：
In formula, (xw, yw, zw) be known reference white light source chromaticity coordinates, (xi, yi, zi| i=r, g, b) be respectively it is red, Green, blue three-color component chromaticity coordinates, (fi| i=r, g, b) be respectively three kinds of color components of red, green, blue ratio；
Then, radiance efficiency of the every group of spectrum under known reference white light source is calculated according to formula (6)：
In formula, LER is radiance efficiency, Pout(λ) is the power spectral density of the light source of total output light, and V (λ) is standard Luminosity function, while KmIt is under photopic conditions in the case where ideal monochrome 555nm light source, LER value is 683lm/ W；
The light energy use efficiency of each group of spectrum can be indicated with following formula：
In formula, Pout(λ) is the power spectral density of the light source of total output light, Pin(λ) is the power spectrum of the light source of total input light Density；
The total light energy use efficiency of every group of spectrum can be calculated with following formula：
TLE=LERTE (8)
In formula, TLE is the total light energy use efficiency of spectrum；
Step S4, coloring domain and the optimal spatial distribution combination of light energy use efficiency are chosen from every group of spectrum, as face Color converts the design spectroscopic data of film, selects suitable material as the light conversion material of color conversion film according to spectroscopic data.
In an embodiment of the present invention, in the step S1, selection and the color filter film spectrum in liquid crystal display device Transmitance matches light source light spectrum, i.e., the spectrum that the peak center wavelength of selected light source light spectrum falls in color filter film is maximum thoroughly Cross wave-length coverage corresponding to rate；In the step S4, coloring domain and optimal group of light energy use efficiency are chosen from every group of spectrum It closes, that is, refers to and colour gamut highest, light energy use efficiency highest or the optimum combination for taking into account the two are selected according to practical application.
In an embodiment of the present invention, the light source on color conversion film is incident on for collimation ultraviolet light, wherein ultraviolet photopeak It is worth central wavelength range from 325nm to 390nm, and spectrum halfwidth is 20nm and its hereinafter, the color converts the indigo plant on film The luminescent spectrum peak center wave-length coverage of color, green and red is respectively：445nm < λb< 460nm, 510nm < λg< 555nm, 630nm < λr< 685nm, luminescent spectrum halfwidth are 30nm and its following.
In an embodiment of the present invention, the light source on color conversion film is incident on as collimation blue light, blue peak center Wave-length coverage is from 445nm to 460nm, and spectrum halfwidth is 20nm and its hereinafter, the color converts green and red on film Luminescent spectrum peak center wavelength be respectively 510nm < λg< 555nm, 630nm < λr< 685nm, the half of luminescent spectrum are high Width is 30nm and its following.
The following are specific implementation examples of the invention.
The present invention designs a kind of color conversion film, and uniform collimated back can be converted after color conversion film Red and green light and FWHM at FWHM width less than 30nm are less than the blue light of 20nm, and its peak center wavelength can be according to color Domain and light efficiency require to be selected；The color transition region that the color is converted in film is made of quanta point material.The color turns Film is changed to be made of three-decker, wherein lower layer be made of the transparent substrate of high transmittance, middle layer is lattice by periodic arrangement Son is constituted, upper layer is made of the transparent substrate of high transmittance.Barrier ruler in middle layer between the size and grid of each grid It is very little to be consistent with the transmission light portion size and barrier of the color filter film of the liquid crystal display of corresponding use.As shown in Figure 2 Lower layer and upper layer are made of PET material or optical grade PMMA material, and thickness range is between 0.05mm to 0.5m；In described The thickness of interbed is between 1um to 10um.
Fig. 1-3 is described as follows：
Fig. 1 is that color converts film interlayer structure figure, and 101 be black barrier in Fig. 1, and 102 be red quantum dot material, 103 be green quanta point material, and 104 be transparent material or blue quanta point material, these quanta point materials are by quantum dot, divide Powder and polymer, in mass ratio, the quantum dot account for 3.3% to the 7.8% of gross mass, and the solvent accounts for gross mass 50.4% to 78.1%, the polymer accounts for 18.1% to the 47.3% of gross mass.
Fig. 2 is that color converts membrane structure figure, and 10 be middle layer in Fig. 2；11 be upper layer, and 12 be lower layer, and upper and lower layer main body is Transparent organic glass plays the role of protecting middle layer quantum dot water proof oxygen-impermeable.
Fig. 3 is the liquid crystal display die set that film is converted containing color, and 1 converts film for color in Fig. 3；2 be light source, blue light or Ultraviolet light；3 be collimated backlight；4 be the polarizer；5 be liquid crystal and TFT；6 be color filter film；7 be analyzer.
In the embodiment of the present invention 1：As Fig. 1 color conversion layer middle layer (10) on grid to be transmissive to blue The transparent region (104) of light and insertion coated with two regions that can emit green (103) and red (102) primitive color light are One group of periodic repeated arrangement, and be by black barrier interval (101) between them.Blue light can be penetrated in middle layer Region, be transparent filler such as PET material or optical grade PMMA material, can launch green and primary red area The material of its insertion of domain or coating is quantum dot fluorescence material, and wherein green area is green quantum dot and red area is red Quantum dot.The backlight of the liquid crystal module as shown in Figure 3 using blue light as light source (2), place by color conversion film (1) In blue-light source above the backlight (3) after uniformly collimating, wherein blue collimation plane uniform source of light passes through the color Blue light is penetrated after conversion film (1) respectively, the green light source with blue is converted out and converts out the red light with blue, together When color conversion film and traditional color filter film (6) cooperate, will not turn in color conversion film (1) Green and red area The blue light changed filters out, to promote the colour purity of liquid crystal display device, gamut area and light efficiency.
The quantum dot is red quantum dot (102) and green quantum dot (103), including Cdse/ZnS, InP/ZnS, Pbse/ PbS, Cdse/CdS, CdTe/CdS or CdTe/ZnS, size are distributed in 1nm to 10nm；The emission peak wave of the green quantum dot A length of 510 arrive 555nm；The emission peak wavelength of the red quantum dot is 635 to 685nm；The halfwidth of its luminescent spectrum is 30nm and its following.
In the embodiment of the present invention 2：As Fig. 1 color conversion layer middle layer (10) on grid be embedded in or be coated with energy Enough three regions for emitting blue (104), green (103) and red (102) primitive color light are one group of periodic repeated arrangement, and It and between them is by black barrier interval (101).Three regions that can emit primitive color light in middle layer, insertion or painting The material covered is quantum dot fluorescence material, and wherein blue region is blue quantum dot, green area is green quantum dot and red Region is red quantum dot.For the backlight of the liquid crystal module as shown in Figure 3 using ultraviolet light as light source, the color converts film Ultraviolet source is placed on above the backlight (2) after uniformly collimating, wherein ultraviolet collimation plane uniform source of light passes through institute State color conversion film (1) after convert out respectively with ultraviolet light blue-light source, convert out with ultraviolet light green light source and The red light with ultraviolet light is converted out, while color conversion film and traditional color filter film (6) cooperate, and ultraviolet light is passed through Non-switched ultraviolet light filters out after crossing color conversion film (1), to promote the colour purity of liquid crystal display device, gamut area and light Effect.
The quantum dot is blue quantum dot (104), red quantum dot (102) and green quantum dot (103), including Cdse/ZnS, InP/ZnS, Pbse/PbS, Cdse/CdS, CdTe/CdS or CdTe/ZnS, size are distributed in 1nm to 10nm；The indigo plant quantum dot Emission peak wavelength be 445nm to 460nm, the halfwidth of luminescent spectrum is 20nm and its following；The green quantum dot Emission peak wavelength is 510 to 555nm；The emission peak wavelength of the red quantum dot is 630 to 685nm；Its luminescent spectrum Halfwidth is 30nm and its following.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.

Claims (10)

1. a kind of color converts film, which is characterized in that including the grilled middle layer of close-packed arrays, be respectively arranged in middle layer, The upper layer of lower section, lower layer, the upper layer, lower layer are made of the transparent substrate of high transmittance；The grid of the middle layer is with energy Grid/insertion of enough transparent regions transmitted through blue light or grid coated with the blue region that can emit blue light primitive color light, Insertion or the grid coated with the green wavelength that can emit green primaries light and insertion are red former coated with that can emit The grid of the red light region of coloured light is one group of periodic repeated arrangement, and grid/blue region grid of transparent region, green By black barrier interval between the grid in light region, the grid of red light region.
2. a kind of color according to claim 1 converts film, which is characterized in that the grid of the transparent region is transparent Filler be PET material or optical grade PMMA material；The lattice of the grid of blue region, the grid of green wavelength or red light region The material of son, insertion or coating is quantum dot fluorescence material, wherein blue region is blue quantum dot, green area is green Color quantum dot, red area are red quantum dot.
3. a kind of color according to claim 1 converts film, which is characterized in that the lower layer, upper layer are by PET material Or optical grade PMMA material is constituted, thickness range is between 0.05mm to 0.5mm；The thickness of the middle layer is arrived in 1um Between 10um.
4. a kind of color according to claim 1 converts film, which is characterized in that the size and lattice of each grid in middle layer Barrier size between son and the light transmission part size and barrier of the liquid crystal pixel of the liquid crystal display of corresponding collocation and color filter film Wall size is mutually matched.
5. a kind of liquid crystal module constituted based on any color conversion film of Claims 1-4, which is characterized in that the liquid For the backlight of brilliant mould group using blue light as light source, light source obtains blue collimation plane uniform source of light after uniformly collimating, and It appears blue light respectively after color converts film, convert out the green light with blue light and convert out the feux rouges with blue light, simultaneously should Color converts film and color filter film cooperates, and color is converted non-switched blue light in film and is filtered out；Wherein, the color conversion The grid of film middle layer is one group periodically heavy with the grid of the grid of transparent region, the grid of green wavelength, red light region Multiple bank column.
6. a kind of liquid crystal module constituted based on any color conversion film of Claims 1-4, which is characterized in that the liquid For the backlight of brilliant mould group using ultraviolet light as light source, light source obtains ultraviolet collimation plane uniform source of light after uniformly collimating, And it converts out blue light with ultraviolet light respectively after color converts film, convert out the green light and converting out with ultraviolet light and have The feux rouges of ultraviolet light, while color conversion film and color filter film cooperate, and color is converted non-switched ultraviolet light in film and is filtered It removes；Wherein, the grid of the color conversion film middle layer is with the grid of blue region, the grid of green wavelength, red light region Grid be one group of periodic repeated arrangement.
7. a kind of liquid crystal module according to claim 5 or 6, which is characterized in that the material of the color conversion film passes through It is chosen using wide colour gamut and high photosynthetic efficiency spectrum calculation method, to improve the gamut range and effect of liquid crystal display or lighting apparatus It is as follows that rate, specific wide colour gamut and high photosynthetic efficiency spectrum calculate method and step：
Step S1, the spectrum according to the blue and green light of the color of the use in liquid crystal display device conversion film and red light region is saturating Rate is crossed, the light source light spectrum that matches with the color filter film spectral transmittance in liquid crystal display device is selected, obtains several groups spectrum Data, and the following quantum dot spectrum Gauss curve fitting function of use calculates the spatial distribution data of every group of spectrum：
S (λ)=Aexp [- 2.773 (λ-λc)2/(Δλ)2] (1)
In formula, S (λ) indicates that quantum dot spectrum, A indicate spectrum peak, λcIndicate spectral centroid wavelength, the half of Δ λ expression spectrum is high Wide wavelength；
Step S2, the resulting every group of spatial distribution data of step S1 are converted into corresponding chromaticity coordinates respectively, calculation formula is as follows：
In formula, S (λ) is the emission spectrum of backlight, then X, Y, Z are the tristimulus values of the backlight, For CIE1931 standard colorimetric observer's spectral tristimulus value curve, x, y and z are known as the chromaticity coordinates of CIE1931 colorimeter system；
Then, according to formula (4) calculate separately out every group of spectrum corresponding to colour gamut：
In formula, SrgbIndicate the area of colour triangle, xrAnd yrIt is the chromaticity coordinates of red primaries, xgAnd ygIt is the chromaticity coordinates of green primary color, xbAnd ybIt is the chromaticity coordinates of blue primary；CGR indicates the ratio of colour gamut covering, AdisplayIndicate the gamut area of display device, AstandardIndicate the area of standard color gamut；
Step S3, the luminous energy ratio of three kinds of primary color spectras is calculated according to the requirement of the colour temperature of white balance to be achieved, then again The light energy use efficiency of every group of spectrum is calculated according to visual efficiency function, it is specific as follows：
The respective luminous intensity ratio of three kinds of primary color spectras is solved according to the mild three kinds of primary colors chromaticity coordinates of aim colour, calculation formula is such as Under：
In formula, (xw, yw, zw) be known reference white light source chromaticity coordinates, (xi, yi, zi| i=r, g, b) it is red, green, blue respectively The chromaticity coordinates of three kinds of color components, (fi| i=r, g, b) be respectively three kinds of color components of red, green, blue ratio；
Then, radiance efficiency of the every group of spectrum under known reference white light source is calculated according to formula (6)：
In formula, LER is radiance efficiency, Pout(λ) is the power spectral density of the light source of total output light, and V (λ) is standard luminescent Spend function, while KmIt is under photopic conditions in the case where ideal monochrome 555nm light source, LER value is 683lm/W；
The light energy use efficiency of each group of spectrum can be indicated with following formula：
In formula, Pout(λ) is the power spectral density of the light source of total output light, Pin(λ) is the power spectrum of the light source of total input light Degree；
The total light energy use efficiency of every group of spectrum can be calculated with following formula：
TLE=LERTE (8)
In formula, TLE is the total light energy use efficiency of spectrum；
Step S4, coloring domain and the optimal spatial distribution combination of light energy use efficiency are chosen from every group of spectrum, are turned as color The design spectroscopic data for changing film selects suitable material as the light conversion material of color conversion film according to spectroscopic data.
8. a kind of liquid crystal module according to claim 7, which is characterized in that in the step S1, selection and liquid crystal display Color filter film spectral transmittance in device matches light source light spectrum, i.e., the peak center wavelength of selected light source light spectrum is fallen in Wave-length coverage corresponding to the spectrum maximum transmission of color filter film；In the step S4, coloring domain is chosen from every group of spectrum With the optimal combination of light energy use efficiency, that is, refers to and colour gamut highest, light energy use efficiency highest are selected according to practical application or taken into account The optimum combination of the two.
9. a kind of liquid crystal module according to claim 7, which is characterized in that be incident on subject to the light source on color conversion film Straight ultraviolet light, wherein ultraviolet light peak center wave-length coverage from 325nm to 390nm, and spectrum halfwidth be 20nm and its hereinafter, The luminescent spectrum peak center wave-length coverage of blue, green and red on color conversion film is respectively：445nm < λb< 460nm, 510nm < λg< 555nm, 630nm < λr< 685nm, luminescent spectrum halfwidth are 30nm and its following.
10. a kind of liquid crystal module according to claim 7, which is characterized in that being incident on the light source that color is converted on film is Blue light is collimated, blue peak central wavelength range is from 445nm to 460nm, and spectrum halfwidth is 20nm and its hereinafter, described It is respectively 510nm < λ that color, which converts green and red luminescent spectrum peak center wavelength on film,g< 555nm, 630nm < λr< 685nm, the halfwidth of luminescent spectrum are 30nm and its following.
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