CN104297984A - Color film substrate, manufacturing method thereof and liquid crystal display device - Google Patents
Color film substrate, manufacturing method thereof and liquid crystal display device Download PDFInfo
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- CN104297984A CN104297984A CN201410504905.2A CN201410504905A CN104297984A CN 104297984 A CN104297984 A CN 104297984A CN 201410504905 A CN201410504905 A CN 201410504905A CN 104297984 A CN104297984 A CN 104297984A
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
Abstract
The invention provides a color film substrate, a manufacturing method of the color film substrate and a liquid crystal display device and belongs to the field of liquid crystal display. The color film substrate comprises a light-emitting layer formed on a substrate, the light-emitting layer comprises a plurality of light-emitting areas capable of emitting light with different colors, the light-emitting areas are formed by quantum dot materials, and light with the corresponding color is emitted after the quantum dot materials are excited; a blue light filter layer arranged corresponding to the light-emitting layer is formed on the light-emitting layer. According to the technical scheme, the color gamut of a display frame can be improved, color saturation is increased, the quality of the display frame is improved, and the brightness of the display frame is guaranteed.
Description
Technical field
The present invention relates to field of liquid crystal display, refer to a kind of color membrane substrates and preparation method thereof, liquid crystal indicator especially.
Background technology
Existing display panels comprises array base palte to box and color membrane substrates, and the liquid crystal layer between array base palte and color membrane substrates, the backlight that available liquid crystal display panel uses is generally white backlight, this white backlight carries out mixed light by blue-ray LED and yellow light LED to form, color is impure, the monochromatic light that this white backlight obtains after the colored light-filtering units in color membrane substrates is filtered comprises the multiple color outside desired color, so just cause the colour gamut of display frame lower, color is truly bright-coloured not
Quantum dot (Quantum Dot, QD) namely nanocrystal, it is a kind of nano material of accurate zero dimension, combined " artificial molecule " by 103-105 atom, the size of quantum dot three dimensions is all between 1 ~ 10nm, the motion of its internal electron in all directions is all limited to, so quantum confined effect (quantum confinement effect) is remarkable especially.Because electronics and hole are by quantum confinement, continuous print band structure becomes the discrete energy levels structure with molecular characterization.The quantum dot of different size, electronics and hole are by the degree varies sample of quantum confinement, and the discrete energy levels structure of molecular characterization is also different because of the size difference of quantum dot.Therefore, be subject to after extraneous energy excites, the quantum dot of different size will send the fluorescence of different wave length, the namely light of shades of colour.In addition, because the wavelength of quantum dot stimulated emission is with only relevant with the level structure (size of quantum dot) of quantum dot, so the wavelength halfwidth (FWHM) launched is very narrow, luminance purity is very high, therefore, adopt quantum dot to have very high colour gamut as the display device of luminescent layer, display quality is very high.
But adopt quantum dot to need to excite with blue-ray LED (light emitting diode) as luminescent layer, and blue led have the shortcomings such as luminescence efficiency is low, preparation cost is high, causes the brightness of display frame to have very large decline.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of color membrane substrates and preparation method thereof, liquid crystal indicator, can improve the colour gamut of display frame, increases color saturation, promotes display frame quality, and ensures the brightness of display frame.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, a kind of color membrane substrates is provided, comprises:
Be formed in the luminescent layer on underlay substrate, described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Formed on the light-emitting layer, the blue color filter layer that arrange corresponding to described luminescent layer.
Further, described color membrane substrates also comprises:
Black matrix between adjacent light-emitting zone.
Further, described color membrane substrates also comprises:
The first protective seam between described blue color filter layer and described luminescent layer.
Further, described color membrane substrates also comprises:
Cover the second protective seam of described blue color filter layer.
Further, described luminescent layer comprises emitting red light region, green emitting region and blue-light-emitting region, and described emitting red light region is formed by red quantum point material, and described green emitting region is formed by green quanta point material; Described blue-light-emitting region is formed by blue quanta point material or is formed by transparent material.
Further, the material of described blue color filter layer is blue resins.
Further, described quantum dot is core-shell type quantum point.
The embodiment of the present invention additionally provides a kind of liquid crystal indicator, comprises color membrane substrates as above and backlight, and described backlight is white light backlight.
Further, described backlight is white light-emitting diode.
The embodiment of the present invention additionally provides a kind of method for making of color membrane substrates as above, and described method for making comprises:
Underlay substrate forms luminescent layer, and described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Form the blue color filter layer that arrange corresponding to described luminescent layer on the light-emitting layer.
Embodiments of the invention have following beneficial effect:
In such scheme, the white light that backlight produces can be converted into the shorter blue light of wavelength by arranging of blue color filter layer, and excites the quantum dot of corresponding light-emitting zone, thus launches the light of different colours.Because quantum dot has the narrow advantage of emission spectrum, and luminescence efficiency is high, therefore adopts quantum dot as luminescent layer, its monochromatic emission peak is narrower, luminescence efficiency is high, the colour gamut of the display frame of display device can be increased substantially, increase color saturation, promote the quality of display frame; In addition due to the existence of blue color filter layer, can no longer adopt blue led as backlight, avoid and adopt the shortcoming that blue led is low as backlight luminescence efficiency, cost is high, the brightness of display frame can be improved.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention color membrane substrates;
Fig. 2 is the schematic flow sheet of the method for making of embodiment of the present invention color membrane substrates;
Fig. 3 is the schematic diagram that the embodiment of the present invention forms after black matrix on underlay substrate;
Fig. 4 is the schematic diagram that the embodiment of the present invention forms after the light-emitting zone of different size quantum dot;
Fig. 5 is the schematic diagram that the embodiment of the present invention forms after the first protective seam;
Fig. 6 is the schematic diagram that the embodiment of the present invention forms after blue color filter layer.
Embodiment
For embodiments of the invention will be solved technical matters, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention provide a kind of color membrane substrates and preparation method thereof, liquid crystal indicator, can improve the colour gamut of display frame, increase color saturation, promote display frame quality, and ensure the brightness of display frame.
Embodiments provide a kind of color membrane substrates, described color membrane substrates comprises:
Be formed in the luminescent layer on underlay substrate, described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Formed on the light-emitting layer, the blue color filter layer that arrange corresponding to described luminescent layer.
In color membrane substrates of the present invention, the white light that backlight produces can be converted into the shorter blue light of wavelength by arranging of blue color filter layer, and excites the quantum dot of corresponding light-emitting zone, thus launches the light of different colours.Because quantum dot has the narrow advantage of emission spectrum, and luminescence efficiency is high, therefore adopts quantum dot as luminescent layer, its monochromatic emission peak is narrower, luminescence efficiency is high, the colour gamut of the display frame of display device can be increased substantially, increase color saturation, promote the quality of display frame; In addition due to the existence of blue color filter layer, can no longer adopt blue led as backlight, avoid and adopt the shortcoming that blue led is low as backlight luminescence efficiency, cost is high, the brightness of display frame can be improved.
Further, described color membrane substrates also comprises: the black matrix between adjacent light-emitting zone.
Further, described color membrane substrates also comprises: the first protective seam between described blue color filter layer and described luminescent layer, the first protective seam can be protected luminescent layer.
Further, described color membrane substrates also comprises: the second protective seam covering described blue color filter layer, the second protective seam can be protected blue color filter layer.
Further, described colorful light-emitting region comprises emitting red light region, green emitting region and blue-light-emitting region, and described emitting red light region is formed by red quantum point material, and described green emitting region is formed by green quanta point material; Described blue-light-emitting region is formed by blue quanta point material; Further, blue-light-emitting region can also be formed by transparent material, because be also provided with blue color filter layer on luminescent layer, when display device works, after the light transmission blue color filter layer of backlight outgoing be blue light, therefore blue-light-emitting region can adopt transparent material to be formed.
Further, the material of described blue color filter layer is blue resins, and particularly, blue color filter layer can adopt the material identical with existing color membrane substrates blue sub-pixel.
Further, described quantum dot is core-shell type quantum point, and thus hud typed quantum dot has better luminescence efficiency due to the surface imperfection that can reduce nano particle.
The embodiment of the present invention additionally provides a kind of liquid crystal indicator, comprises color membrane substrates as above and backlight.Wherein, the structure of color membrane substrates and the same above-described embodiment of principle of work, do not repeat them here.In addition, the structure of other parts of liquid crystal indicator with reference to prior art, can be not described in detail this herein.This liquid crystal indicator can be: TV, display, digital album (digital photo frame), mobile phone, panel computer etc. have product or the parts of any Presentation Function.Backlight is wherein white light backlight.
Further, this backlight is White LED (light emitting diode), and this backlight is compared with the blue light backlight of blue led, and brightness is higher, and the life-span is longer, and cost is lower.
The embodiment of the present invention additionally provides a kind of method for making of above-mentioned color membrane substrates, and described method for making comprises:
Underlay substrate forms luminescent layer, and described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Form the blue color filter layer that arrange corresponding to described luminescent layer on the light-emitting layer.
Further, described method for making also comprises: form black matrix, and described black matrix is between adjacent light-emitting zone.
Further, described method for making also comprises: between described blue color filter layer and described luminescent layer, form the first protective seam.
Further, described method for making also comprises: form the second protective seam covering described blue color filter layer.
Comprise emitting red light region, green emitting region and blue-light-emitting region for luminescent layer below, by reference to the accompanying drawings and specific embodiment color membrane substrates of the present invention and preparation method thereof is described in detail:
As shown in Figure 1; the color membrane substrates of the present embodiment comprises underlay substrate 1; black matrix 2; luminescent layer; first protective seam 4, blue color filter layer 3, second protective seam 8 of corresponding luminescent layer; luminescent layer comprises emitting red light region 5, green emitting region 6, blue-light-emitting region 7, has red light quantum point, green quantum dot and blue quantum dot respectively.Quantum dot is that some naked eyes cannot be seen, extremely small semiconductor nanocrystal, and combined by zinc, cadmium, selenium and sulphur atom, the particle diameter in crystal is less than 10 nanometers.It has a distinguished characteristic: will be luminous when being subject to electricity or light stimulus, produces light and pure color, and the light color sent determined by the composition material of quantum dot and size, shape.Preferably, red light quantum point, green light quantum point and blue quantum dot are respectively hud typed red light quantum point, green light quantum point and blue quantum dot.Thus hud typed quantum dot has better luminescence efficiency due to the surface imperfection that can reduce nano particle, and hud typed quantum dot is adopt the coated nuclear material containing cadmium of green shell material.The material of described nucleocapsid red light quantum point, nucleocapsid green light quantum point and nucleocapsid blue light quantum point can be the same or different.Its nuclear material can be cadmium selenide, cadmium sulfide, cadmium telluride, Se deposit ternary compound, selen-tellurjum cadmium ternary compound, sulphur cadmium telluride ternary compound, cadmium sulphur selenium ternary compound.Shell material can be zinc sulphide, zinc selenide, zinc telluridse, zinc sulphur selenium ternary compound, zinc sulphur tellurium ternary compound, zinc telluride selenide ternary compound.Certainly, the material of this quantum dot include but are not limited to: above-mentioned enumerate out several, have and with above-mentioned substance, there is same or analogous other materials and can be suitable for too.
The quantum dot of different size produces different colors by exciting, general red light quantum point is of a size of about 7 ~ 10nm, and green quantum dot is of a size of 5 ~ 7nm, and blue light quantum point is of a size of below 5nm, certainly according to the difference of quanta point material, size also has difference.Due to the size of red light quantum point, green light quantum point and blue light quantum point or material different, backlight light by blue color filter layer through blue-light excited under, monochromatic ruddiness can be produced in red light district, monochromatic green glow can be produced in green Region, monochromatic blue light can be produced in blue light region.The quantum efficiency of the quantum dot of nucleocapsid material can reach 80% ~ 90%, blue light through blue color filter layer all can be converted into ruddiness or green glow or blue light, excite the monochromatic light obtained to have the narrow and symmetrical advantage of emission spectrum, color can accuracy controlling, photochemical stability is high, and fluorescence lifetime is long, can increase substantially the colour gamut of the display frame of display device, increase color saturation, promote the quality of display frame.
In addition, in the present embodiment, due to the existence of blue color filter layer, can no longer adopt blue led as backlight, avoid and adopt the shortcoming that blue led is low as backlight luminescence efficiency, cost is high, the brightness of display frame can be improved.
As shown in Figure 2, the method for making of the color membrane substrates of the present embodiment specifically comprises the following steps:
Step 101, provide a underlay substrate 1, underlay substrate 1 is formed black matrix 2;
Particularly, underlay substrate 1 can be glass substrate or quartz base plate.As shown in Figure 3, underlay substrate 1 is cleaned, then on underlay substrate 1 spin coating or blade coating black photoresist, form the figure of black matrix 2 limiting pixel region through exposure imaging post-drying.
Step 102, on the underlay substrate 1 through above-mentioned steps, form the figure of luminescent layer, luminescent layer comprises emitting red light region 5, green emitting region 6, blue-light-emitting region 7;
Particularly, or can print in emitting red light region 5 that black matrix 2 limits by red quantum point transfer printing, by green quantum dot transfer printing or print in green emitting region 6 that black matrix 2 limits, by blue quantum dot transfer printing or print in blue-light-emitting region 7 that black matrix 2 limits, form structure as shown in Figure 4.General red light quantum point is of a size of about 7 ~ 10nm, and green quantum dot is of a size of 5 ~ 7nm, and blue light quantum point is of a size of below 5nm.
Further, the mode of solubilize spin coating can also be adopted to be formed in by red quantum point in the emitting red light region 5 of black matrix restriction, green quantum dot is formed in the green emitting region 6 of black matrix restriction, blue quantum dot is formed in the blue-light-emitting region 7 of black matrix restriction.
Step 103, on the underlay substrate 1 through above-mentioned steps, form the first protective seam 4;
Particularly, the first protective seam 4 can adopt transparent resin, and the mode of spin coating can be adopted to be formed on the underlay substrate 1 of above-mentioned steps by the first protective seam 4, forms structure as shown in Figure 5.
Using plasma enhancing chemical vapor deposition (PECVD) method can also deposit the first protective seam 4 on the underlay substrate 1 through above-mentioned steps; first protective seam 4 can select oxide, nitride or oxynitrides, and corresponding reacting gas is SiH
4, NH
3, N
2or SiH
2cl
2, NH
3, N
2.
Step 104, on the underlay substrate 1 through above-mentioned steps, form blue color filter layer 3;
Particularly, on the underlay substrate 1 through above-mentioned steps, can form blue color filter layer 3 by coating, sputtering, deposition or other modes, the thickness of blue color filter layer 3 can be 0.2 ~ 0.7 μm, forms structure as shown in Figure 6.
Step 105, on the underlay substrate 1 through above-mentioned steps, form the second protective seam 8.
Particularly, the second protective seam 8 can adopt transparent resin, and the mode of spin coating can be adopted to be formed on the underlay substrate 1 of above-mentioned steps by the second protective seam 8, forms structure as shown in Figure 1.
Using plasma enhancing chemical vapor deposition (PECVD) method can also deposit the second protective seam 8 on the underlay substrate 1 through above-mentioned steps; second protective seam 8 can select oxide, nitride or oxynitrides, and corresponding reacting gas is SiH
4, NH
3, N
2or SiH
2cl
2, NH
3, N
2.
Through the structure that above-mentioned steps 101-105 can obtain as shown in Figure 1, oriented layer and chock insulator matter can also be prepared in structure as shown in Figure 1 afterwards, form color membrane substrates, and color membrane substrates and array base palte are carried out becoming liquid crystal indicator to box-like.When liquid crystal indicator works, the light that backlight sends is at incident illumination layer after blue color filter layer, the white light that backlight produces can be converted into the shorter blue light of wavelength by blue color filter layer, and excites the quantum dot of corresponding light-emitting zone, thus launches the light of different colours.Because quantum dot has the narrow advantage of emission spectrum, and luminescence efficiency is high, therefore adopts quantum dot as luminescent layer, its monochromatic emission peak is narrower, luminescence efficiency is high, the colour gamut of the display frame of display device can be increased substantially, increase color saturation, promote the quality of display frame; In addition due to the existence of blue color filter layer, can no longer adopt blue led as backlight, avoid and adopt the shortcoming that blue led is low as backlight luminescence efficiency, cost is high, the brightness of display frame can be improved.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a color membrane substrates, is characterized in that, comprising:
Be formed in the luminescent layer on underlay substrate, described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Formed on the light-emitting layer, the blue color filter layer that arrange corresponding to described luminescent layer.
2. color membrane substrates according to claim 1, is characterized in that, described color membrane substrates also comprises:
Black matrix between adjacent light-emitting zone.
3. color membrane substrates according to claim 1, is characterized in that, described color membrane substrates also comprises:
The first protective seam between described blue color filter layer and described luminescent layer.
4. color membrane substrates according to claim 1, is characterized in that, described color membrane substrates also comprises:
Cover the second protective seam of described blue color filter layer.
5. the color membrane substrates according to any one of claim 1-4, it is characterized in that, described luminescent layer comprises emitting red light region, green emitting region and blue-light-emitting region, described emitting red light region is formed by red quantum point material, and described green emitting region is formed by green quanta point material; Described blue-light-emitting region is formed by blue quanta point material or is formed by transparent material.
6. the color membrane substrates according to any one of claim 1-4, is characterized in that, the material of described blue color filter layer is blue resins.
7. the color membrane substrates according to any one of claim 1-4, is characterized in that, described quantum dot is core-shell type quantum point.
8. a liquid crystal indicator, is characterized in that, comprises the color membrane substrates according to any one of claim 1-7 and backlight, and described backlight is white light backlight.
9. liquid crystal indicator according to claim 8, is characterized in that, described backlight is white light-emitting diode.
10. a method for making for color membrane substrates as claimed in any one of claims 1-9 wherein, is characterized in that, described method for making comprises:
Underlay substrate forms luminescent layer, and described luminescent layer comprises multiple light-emitting zone that can send different colours light, and described light-emitting zone is formed by quanta point material, and described quanta point material sends the light of corresponding color after being excited;
Form the blue color filter layer that arrange corresponding to described luminescent layer on the light-emitting layer.
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| CN104991374A (en) * | 2015-07-23 | 2015-10-21 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
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| CN105093682A (en) * | 2015-09-08 | 2015-11-25 | 深圳市华星光电技术有限公司 | Liquid crystal display |
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