CN105116611A - Light leakage preventing structure applied in cooperation with quantum dot high-color-gamut optical film - Google Patents
Light leakage preventing structure applied in cooperation with quantum dot high-color-gamut optical film Download PDFInfo
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- CN105116611A CN105116611A CN201510606403.5A CN201510606403A CN105116611A CN 105116611 A CN105116611 A CN 105116611A CN 201510606403 A CN201510606403 A CN 201510606403A CN 105116611 A CN105116611 A CN 105116611A
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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
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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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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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)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a light leakage preventing structure applied in cooperation with a quantum dot high-color-gamut optical film. The structure comprises a backlight source, and the surface of at least one module of the backlight source is provided with a color coating which contains a light absorption material and/or a fluorescent material. The light absorption material absorbs excessive blue light on the periphery of the edge of a blue-light LED backlight source, and the fluorescent material absorbs blue light and then converts the excessive blue light into white light. The blue light leakage defect of liquid crystal display equipment with the quantum dot high-color-gamut optical film and the blue light LED backlight source is effectively overcome.
Description
Technical field
The present invention relates to field of display devices, particularly relate to the liquid crystal display field having used quantum dot high colour gamut blooming technology.
Background technology
At present, technology of quantum dots is applied to field of liquid crystal display, significantly can improve colour gamut and the colour vividness of display device, and capable of reducing energy consumption.Colour gamut can bring up to 100% (NTSC standard) from 70% of existing main flow display device (NTSC standard).Technology of quantum dots is applied to liquid crystal display, during the display device of especially small-medium size, usually uses fluorescent film (i.e. quantum dot high colour gamut blooming) the matching used blue-ray LED backlight with it containing quantum dot.
But some blue light can spill from the gap between the frame of backlight and light guide plate.When the width of LCDs frame is less, its frame is difficult to block the blue light spilt from backlight edge surrounding completely, when causing display device normally to show, screen edge surrounding occurs significantly blue, cause whole screen edge place color distortion, greatly reduce the display quality of display device thus.The phenomenon of this leakage blue light is particularly outstanding in the display device of small-medium size, and this is because the display screen frame of small-medium size is narrower, more difficultly blocks the blue light spilt from backlight edge surrounding.
And, in recent years the development of small-medium size display device is just carried out towards narrow the frame even direction of Rimless, this makes the problem of Lou blue light more outstanding, and existing light leakage technology mainly adopts baffle plate and photomask to block the light spilt from backlight frame, now the blue light total amount of light-guide edge does not decline, just disperseed in light-guide edge region, now the blue light strength of unit area declines to some extent, but occur that the region of blue light increases, backlight edge surrounding still can be observed obvious blueness, and therefore prior art cannot head it off.
The use quantum dot blooming of prior art and the liquid crystal display of blue-ray LED backlight comprise backlight.This backlight from top to bottom successively layer establish following assembly: liquid crystal panel 101, diffusion barrier 102, brightness enhancement film 103, quantum dot blooming 104, light guide plate 105 and reflective membrane 106.Backlight also comprises frame 107 and blue-ray LED light bar 108, frame 107 and liquid crystal panel 101 are connected to form a cavity volume, and this cavity volume is around in the periphery that layer establishes assembly diffusion barrier 102, brightness enhancement film 103, quantum dot blooming 104, light guide plate 105 and reflective membrane 106, blue-ray LED light bar 108 is placed in frame 107, and is attached at the side of light guide plate 105.
It should be noted that, liquid crystal panel 101, diffusion barrier 102, brightness enhancement film 103, quantum dot blooming 104, light guide plate 105 are sheet material with reflective membrane 106, they are stacked combination each other, the surface that each sheet material is adjacent sheet material laminating is plate face, and the face that each sheet material connects with frame 107 is side.
Wherein, described light absorbent is the color material that can absorb blue light, and it is specially colored dyes or colored pigment.The described colored dyes that can absorb blue light comprises orchil, orange, weld or black dyes; The described colored pigment that can absorb blue light comprises red pigment, orange pigment, yellow uitramarine or black pigment.Described fluorescent material is the color material that can send ruddiness or green glow after absorbing blue light, and it is specially red fluorescence powder, green emitting phosphor, red fluorescence dyestuff or Green fluorescent dye.
As shown in Figure 1, color coating 111 is provided with at the edge in the plate face of light guide plate.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards quantum dot blooming 104 of light guide plate 105.This is coating location 1.
As shown in Figure 2, color coating 111 is provided with at the edge in the plate face of light guide plate.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards reflective membrane 106 of light guide plate 105.This is coating location 2.
As shown in Figure 3, color coating 111 is provided with in the side of light guide plate.Particularly, color coating 111 is provided with in three sides not being fitted with blue-ray LED light bar 108 of light guide plate 105.This is coating location 3.
As shown in Figure 4, color coating 111 is provided with at the edge in the plate face of reflective membrane 106.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards light guide plate 105 of reflective membrane 106.This is coating location 4.
As shown in Figure 5, color coating 111 is provided with at the edge in the plate face of quantum dot blooming 104.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards brightness enhancement film 103 of quantum dot blooming 104.This is coating location 5.
As shown in Figure 6, color coating 111 is provided with at the edge in the plate face of quantum dot blooming 104.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards light guide plate 105 of quantum dot blooming 104.This is coating location 6.
As shown in Figure 7, color coating 111 is provided with at the edge in the plate face of brightness enhancement film 103.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards diffusion barrier 102 of brightness enhancement film 103.This is coating location 7.
As shown in Figure 8, color coating 111 is provided with at the edge in the plate face of brightness enhancement film 103.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards quantum dot blooming 104 of brightness enhancement film 103.This is coating location 8.
As shown in Figure 9, color coating 111 is provided with at the edge in the plate face of diffusion barrier 102.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards liquid crystal panel 101 of diffusion barrier 102.This is coating location 9.
As shown in Figure 10, color coating 111 is provided with at the edge in the plate face of diffusion barrier 102.Particularly, color coating 111 is provided with at four edges, limit in the plate face towards brightness enhancement film 103 of diffusion barrier 102.This is coating location 10.
As shown in figure 11, color coating 111 is provided with at the medial surface of the frame of backlight.Particularly, outside the side corresponding with blue-ray LED light bar 108, three medial surfaces of the frame of remaining backlight are equipped with color coating 111.This is coating location 11.
Wherein, the fluorescent material that described color coating 111 adopts is the material that can send ruddiness, green glow after absorbing blue light, the material that can send other color of light is not selected as the material solving leakage Blue-light filtering using this material, because quantum dot high colour gamut blooming is under the exciting of blue-ray LED, send ruddiness and green glow, preferably do not send the light of other colors.When interpolation can send the material of other color of light, the glow color of quantum dot blooming can be caused impure, thus reduce the colour gamut of display device.
Described light absorbent and/or fluorescent material mix with bonding agent, are made into glue, then coat the backlight assembly surfaces such as reflective membrane, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier, frame, form color coating 111.Described light absorbent and the total concentration of fluorescent material in described glue are 5 ~ 60%, are preferably 10 ~ 40%.Described concentration is depending on Lou blue light degree.The blue light strength spilt is higher, and described material concentration is larger.
Summary of the invention
For this reason, for above-mentioned technical matters, the invention provides the anti-light leakage structure that a kind of simple and effective elimination blue-ray LED backlight edge surrounding leaks the cooperation quantum dot high colour gamut blooming application of blue light, it solves the defect using the liquid crystal display of quantum dot high colour gamut blooming and blue-ray LED backlight to leak blue light.
For achieving the above object, technical scheme provided by the invention is as follows:
The anti-light leakage structure coordinating quantum dot high colour gamut blooming to apply, comprises backlight, arranges color coating in the surface of at least one assembly of described backlight; Described color coating is the coating containing light absorbent and/or fluorescent material, and described light absorbent absorbs the excessive blue light of blue-ray LED backlight edge surrounding, and excessive blue light is transformed into white light after absorbing blue light by described fluorescent material.
Wherein, described color coating is the coating containing light absorbent and/or fluorescent material, mean described color coating and can be coating containing light absorbent, described color coating can be the coating containing fluorescent material, and described color coating also can be the coating containing light absorbent and fluorescent material.
Wherein, described fluorescent material is the material that can send ruddiness or green glow after absorbing blue light, and the blue light that the ruddiness sent and green glow send in conjunction with described blue-ray LED backlight, is combined into white light.
Wherein, the assembly of described backlight comprises reflectance coating, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier and frame, at least one place in the edge on surface of the edge on the edge on the surface of the reflectance coating of this backlight, the surface of light guide plate or side, quantum dot blooming, the edge on the surface of brightness enhancement film, the edge on the surface of diffusion barrier and the inside surface of frame is provided with described color coating, effectively eliminates the unnecessary blue light spilt from backlight edge surrounding.
As a further improvement on the present invention, the selection of the process position of described blue-ray LED backlight assembly is depending on the degree of Lou blue light.The degree of leaking blue light is higher, and process position is more.The regioselective criterion of described process is, after treatment, the blue light strength of backlight edge peripheral regions weakens to consistent with backlight body region, or the ratio of red, green, blue three kinds of color of light of backlight edge peripheral regions is adjusted to consistent with backlight body region.
Preferably, described color coating is provided with at the four limit border areas in the plate face towards light guide plate of reflective membrane.
Preferably, described color coating is provided with at the four limit border areas not being fitted with three sides of blue-ray LED light bar and/or the plate face of this light guide plate of light guide plate.
Preferably, described color coating is provided with at four limit border areas of quantum dot blooming.
Preferably, described color coating is provided with at four limit border areas of brightness enhancement film.
Preferably, described color coating is provided with at four limit border areas of diffusion barrier.
Preferably, in the inner side of the frame of backlight except except not being coated with of blue-ray LED light bar, its excess-three limit is equipped with described color coating.
As a further improvement on the present invention, the fluorescent material after the excessive blue light of described absorption, excessive blue light being transformed into white light is the material that can send ruddiness or green glow after absorbing blue light, adopt the material that can send ruddiness or green glow after absorbing blue light as solving the material leaking Blue-light filtering, and preferably can not send the material of other color of light, because quantum dot high colour gamut blooming is under the exciting of blue-ray LED, send ruddiness and green glow, do not send the light of other colors.When interpolation can send the material of other color of light, the glow color of quantum dot blooming can be caused impure, thus reduce the colour gamut of display device.
As a further improvement on the present invention, described light absorbent is the color material that can absorb blue light, and it is specially colored dyes or colored pigment.
As a further improvement on the present invention, the described colored dyes that can absorb blue light comprises: orchil, orange, weld or black dyes.
As a further improvement on the present invention, the described colored pigment that can absorb blue light comprises: red pigment, orange pigment, yellow uitramarine or black pigment.
As a further improvement on the present invention, described fluorescent material is the color material that can send ruddiness, green glow after absorbing blue light, and it is specially red fluorescence powder, green emitting phosphor, red fluorescence dyestuff or Green fluorescent dye.
As a further improvement on the present invention, the emission wavelength of described red fluorescence material is 610nm ~ 650nm.
As a further improvement on the present invention, the emission wavelength of described green fluorescent material is 510nm ~ 540nm.
As a further improvement on the present invention, the consumption of described light absorbent and fluorescent material and ratio, determine according to the degree of leaking blue light.The backlight of different size model, the degree of leaking blue light is different.Same backlight, the degree that diverse location leaks blue light is different.The blue light strength spilt is higher, and described material usage is larger.Described material usage and the criterion of ratio weaken the blue light strength of backlight edge peripheral regions to consistent with backlight body region, or make the ratio of red, green, blue three kinds of color of light of backlight edge peripheral regions be adjusted to consistent with backlight body region.
As a further improvement on the present invention, the consumption of described light absorbent and fluorescent material and ratio, determine according to the characteristic of different materials, comprise the absorptivity of light absorbent to red, green, blue three kinds of color of light, and the luminescence efficiency of fluorescent material.Described material usage and the criterion of ratio weaken the blue light strength of backlight edge peripheral regions to consistent with backlight body region, or make the ratio of red, green, blue three kinds of color of light of backlight edge peripheral regions be adjusted to consistent with backlight body region.
As a further improvement on the present invention, described light absorbent and fluorescent material are adhered to backlight assembly surface by bonding agent, or these materials self can adhere to backlight assembly surface, or be that these materials can penetrate in backlight assembly, thus form color coating.
As a further improvement on the present invention, also comprise bonding agent in the formula of described color coating, it is specially one or more in organic siliconresin, epoxy resin, acryl resin, polyurethane, UV light-cured resin, polypropylene, polycarbonate, ethylene-vinyl acetate copolymer.
As a further improvement on the present invention, also comprise the solvent of bonding agent in the formula of described color coating, it is specially one or more in aromatic hydrocarbons, alkanes, alcohols, ester class, ketone, ethers.
As a further improvement on the present invention, described color coating is coated on backlight assembly by modes such as flow coat, spraying, blade coating, transfer printings.
As a further improvement on the present invention, described color coating is located at the backlight assembly surfaces such as reflective membrane, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier, frame.The thickness of described color coating is 10 ~ 200 μm, is preferably 50 ~ 120 μm.The thickness of described color coating is depending on Lou blue light degree.The blue light strength spilt is higher, and coating thickness is larger.
As a further improvement on the present invention, described color coating is located at the edge in the plate face of the backlight assemblies such as reflective membrane, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier.And the width of described color coating is 0.2 ~ 1mm, be preferably 0.3 ~ 0.6mm.
As a further improvement on the present invention, described light absorbent and/or fluorescent material mix with bonding agent, be made into glue, then coat the backlight assembly surfaces such as reflective membrane, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier, frame, form color coating.Described can absorb blue light light absorbent and ruddiness can be sent after absorbing blue light, the total concentration of fluorescent material in described glue of green glow be 5 ~ 60%, is preferably 10 ~ 40%.Described concentration is depending on Lou blue light degree.The blue light strength spilt is higher, and described material concentration is larger.
Compared with prior art, there is following good effect: the present invention effectively solves the leakage blue light defect of the liquid crystal display of the use amount high colour gamut blooming of point and blue-ray LED backlight.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of color coating of the present invention coating location 1 in the backlight.
Fig. 2 is the schematic diagram of color coating of the present invention coating location 2 in the backlight.
Fig. 3 is the schematic diagram of color coating of the present invention coating location 3 in the backlight.
Fig. 4 is the schematic diagram of color coating of the present invention coating location 4 in the backlight.
Fig. 5 is the schematic diagram of color coating of the present invention coating location 5 in the backlight.
Fig. 6 is the schematic diagram of color coating of the present invention coating location 6 in the backlight.
Fig. 7 is the schematic diagram of color coating of the present invention coating location 7 in the backlight.
Fig. 8 is the schematic diagram of color coating of the present invention coating location 8 in the backlight.
Fig. 9 is the schematic diagram of color coating of the present invention coating location 9 in the backlight.
Figure 10 is the schematic diagram of color coating of the present invention coating location 10 in the backlight.
Figure 11 is the schematic diagram of color coating of the present invention coating location 11 in the backlight.
When Figure 12 is " backlight assembly is through process " and " backlight assembly is unprocessed " in the embodiment of the present invention 1, the spectrogram of backlight fringe region emitted light.
When Figure 13 is " backlight assembly is through process " and " backlight assembly is unprocessed " in the embodiment of the present invention 4, the spectrogram of backlight fringe region emitted light.
When Figure 14 is " backlight assembly is through process " and " backlight assembly is unprocessed " in the embodiment of the present invention 5, the spectrogram of backlight fringe region emitted light.
Embodiment
The invention provides a kind of anti-light leakage structure coordinating quantum dot high colour gamut blooming to apply, comprise backlight, the assembly of this backlight comprises reflectance coating, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier and frame, by being provided with color coating on the surface at least one place of the reflectance coating of this backlight, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier and frame.
Described color coating is the coating containing light absorbent and/or fluorescent material, mean described color coating and can be coating containing light absorbent, described color coating can be the coating containing fluorescent material, and described color coating also can be the coating containing light absorbent and fluorescent material.
And described light absorbent or fluorescent material only can coat the surface of one of them assembly of this backlight, also can coat multiple assembly surfaces of backlight.
Embodiment 1 ~ 13 is preferred compositions of color coating 111 position, and the color coating 111 that described coating location adopts.As shown in table 1.
The material that the appropriately combined and described coating location of table 1 color coating 111 position adopts
Compared with existing light leakage technology, the invention has the beneficial effects as follows: by using color coating, effectively can solve the leakage Blue-light filtering of the blue-ray LED backlight edge surrounding of use amount point blooming, promoting the image displaying quality of related display device.As shown in Figure 12 ~ 14, for embodiment 1 (Figure 12), embodiment 4 (Figure 13) and embodiment 5 (Figure 14) are before carrying out color coating process to the assembly of blue-ray LED backlight, the blue light strength of backlight edge surrounding is far above green glow and red light intensity, and after color coating process, the blue light strength of backlight edge surrounding and green glow and red light intensity close, illustrate that method provided by the invention is effective.And the amplitude that blue light weakens can adjust arbitrarily according to actual needs.
The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or modification, if these are changed and modification belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the anti-light leakage structure coordinating quantum dot high colour gamut blooming to apply, is characterized in that: comprise backlight, arranges color coating in the surface of at least one assembly of described backlight; Described color coating is the coating containing light absorbent and/or fluorescent material, and described light absorbent absorbs the excessive blue light of blue-ray LED backlight edge surrounding, and excessive blue light is transformed into white light after absorbing blue light by described fluorescent material.
2. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 1, it is characterized in that: the described coating containing fluorescent material is the coating that can send the material of ruddiness or green glow after absorbing blue light, the blue light that the ruddiness sent and green glow send in conjunction with described blue-ray LED backlight, is combined into white light.
3. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 1 or 2, it is characterized in that: the assembly of described backlight comprises reflectance coating, light guide plate, quantum dot blooming, brightness enhancement film, diffusion barrier and frame, at least one place in the edge on surface of the edge on the edge on the surface of the reflectance coating of this backlight, the surface of light guide plate or side, quantum dot blooming, the edge on the surface of brightness enhancement film, the edge on the surface of diffusion barrier and the inside surface of frame is provided with described color coating.
4. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 1, it is characterized in that: described light absorbent is colored pigment or colored dyes, described fluorescent material is fluorescent powder or fluorescent dye.
5. the anti-light leakage structure coordinating quantum dot high colour gamut blooming to apply as described in claim 2 or 4, is characterized in that: described fluorescent material is red fluorescence powder, green emitting phosphor, red fluorescence dyestuff or Green fluorescent dye.
6. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 1, it is characterized in that: the thickness of described color coating is 10 ~ 200 μm.
7. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 3, it is characterized in that: described in be located at the color coating at the edge on the surface of described backlight assembly width be 0.2 ~ 1mm.
8. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 5, it is characterized in that: the emission wavelength of described red fluorescence powder or red fluorescence dyestuff is 610nm ~ 650nm.
9. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 5, it is characterized in that: the emission wavelength of described green emitting phosphor or Green fluorescent dye is 510nm ~ 540nm.
10. coordinate the anti-light leakage structure of quantum dot high colour gamut blooming application as claimed in claim 1, it is characterized in that: described color coating is coated on described backlight assembly by modes such as flow coat, spraying, blade coating, transfer printings.
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