WO2014201758A1 - 彩膜基板、显示装置及彩膜基板的制造方法 - Google Patents

彩膜基板、显示装置及彩膜基板的制造方法 Download PDF

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Publication number
WO2014201758A1
WO2014201758A1 PCT/CN2013/081169 CN2013081169W WO2014201758A1 WO 2014201758 A1 WO2014201758 A1 WO 2014201758A1 CN 2013081169 W CN2013081169 W CN 2013081169W WO 2014201758 A1 WO2014201758 A1 WO 2014201758A1
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Prior art keywords
film
substrate
color
liquid crystal
polarized light
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Ceased
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English (en)
French (fr)
Inventor
张洪术
邵喜斌
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/52—RGB geometrical arrangements

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a color film substrate, a display device, and a method of manufacturing a color film substrate.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • the main structure of the TFT-LCD includes a backlight 1 and a liquid crystal module, and the liquid crystal module mainly includes an array substrate 3 and a color filter substrate which are connected together. And a liquid crystal layer 4 between the array substrate 3 and the color filter substrate, wherein the color filter substrate mainly comprises: a glass substrate 7, a black matrix 5 (Black Matrix, BM for short), and a color photoresist 6.
  • the color filter substrate mainly comprises: a glass substrate 7, a black matrix 5 (Black Matrix, BM for short), and a color photoresist 6.
  • the optical path of the TFT-LCD is as follows: The natural light emitted by the backlight 1 enters the polarizing plate 2 to form linearly polarized light, and the linearly polarized light passes through the liquid crystal module, and the polarization direction of the linearly polarized light is caused by the twist of the liquid crystal molecules in the liquid crystal layer 4.
  • the main function of the black matrix 5 in the color film substrate is to block stray light and prevent light leakage between the sub-pixels; the main function of the color resist 6 is to utilize the filtering
  • the method produces three primary colors of red, green and blue (RGB), each of which forms a sub-pixel, and then mixes the three primary colors of red, green and blue with different strengths and weaknesses to present various colors, so that the TFT-LCD displays full color.
  • Liquid crystals can be classified into nematic liquid crystals, smectic liquid crystals, and cholesteric liquid crystals depending on the type of molecular arrangement.
  • cholesteric liquid crystal is an important liquid crystal material, which has a spiral structure and can selectively reflect light.
  • the wave width of the reflected light is expressed by ⁇ , ⁇ :::: ⁇ )8 ⁇ , ⁇ ::: ⁇ ” ⁇ , where ⁇ and r are the refractive indices parallel and perpendicular to the direction of the incident light, and ⁇ indicates the incident direction and the spiral
  • the angle between the axes, P represents the pitch; in addition to the reflected band, the cholesteric liquid crystal does not affect the amplitude and polarization state of the light wave.
  • the ⁇ value of the colorless organic compound is between 0.3 and 0.4. Therefore, the reflection wavelength ⁇ of the cholesteric liquid crystal is limited to several tens of nanometers in the visible light region, and therefore, the cholesteric liquid crystal is adjusted.
  • the pitch ⁇ can achieve wide-wave reflection.
  • the existing color filter substrate forms a light by filtering, which causes more light loss, and the light utilization efficiency of the backlight is low.
  • An object of the present invention is to provide a color film substrate, a display device, and a method of manufacturing a color filter substrate for reducing the loss of light through the color filter substrate and improving the light utilization efficiency of the backlight.
  • the color filter substrate of the present invention is used for a display panel, the display panel has a plurality of pixels, and each of the pixels has a plurality of sub-pixel units of different colors, and the color filter substrate comprises:
  • the color film on a side of the quarter retardation film facing away from the substrate, the color film having different color transmission regions, each of the color transmission regions transmitting circularly polarized light of a corresponding color And reflect the circularly polarized light of the remaining colors.
  • the display device of the present invention includes the color filter substrate described in the foregoing technical solution.
  • the color filter substrate further comprises a polarization detecting sheet between the base substrate and the quarter retardation film.
  • the angle between the slow axis of the quarter-replacement diaphragm and the transmission axis of the analyzer is 45 ⁇ .
  • the color film comprises two layers of cholesteric liquid crystal film
  • each layer of the cholesteric liquid crystal film comprises a strip-shaped region which is continuously arranged and respectively reflects circularly polarized light of three primary colors of red, green and blue, and the width of the strip-shaped region
  • the strip-shaped regions corresponding to the positions of the two layers of cholesteric liquid crystal film reflect circularly polarized light of different primary colors.
  • the cholesteric liquid crystal film comprises 4-(6-(acryloyloxy:hexyloxy)benzoic acid o-methylhydroquinone diester and 4-(4-pentylcyclohexyl) A mixed solution of benzoic acid phenyl- 1,2-ethylene glycol diester.
  • the color film further comprises a transparent substrate carrying the color film body.
  • the display device of the present invention includes the color filter substrate of any of the above.
  • a method of manufacturing a color filter substrate of the present invention comprising: Forming a black matrix on one side of the substrate substrate;
  • a color film having transmissive regions of different colors is attached over the quarter retardation film.
  • the method before attaching the quarter retardation film to the other surface of the substrate substrate, the method further comprises:
  • a polarizer is attached to the other side of the substrate.
  • the angle between the slow axis of the quarter-replacement diaphragm and the transmission axis of the analyzer is 45°.
  • attaching the color film having different color transmission regions on the quarter retardation film comprises the following steps:
  • a transparent substrate having a first layer of a cholyl ffl alcohol liquid crystal film and a second layer of a cholesteric liquid crystal film is attached over the quarter retardation film.
  • attaching the color film having different color transmission regions on the quarter retardation film comprises the following steps:
  • a mixed solution of methyl hydroquinone diester and 4-(4-pentylcyclohexyl)-benzoic acid phenyl-1,2-ethanediol diester cured by UV light
  • a cholesteric liquid crystal film which is continuously arranged and reflects red, green, and blue primary color circularly polarized light is formed; two transparent substrates having a cholesteric liquid crystal film are staggered by a sub-pixel width, and a matching color film is formed.
  • the alignment color film is attached over the quarter retardation film.
  • FIG. 1 is a schematic structural diagram of a TFTiCD of the prior art
  • FIG. 2 is a schematic structural view of a display panel including a color filter substrate according to an embodiment of the present invention
  • FIG. 3 is a light path diagram of a display panel according to an embodiment of the present invention
  • FIG. 4 is a schematic structural view of a display panel including a color filter substrate according to another embodiment of the present invention
  • FIG. 5 is a schematic structural view of a color film of the present invention
  • FIG. 6 is a schematic flow chart of an embodiment of a method of manufacturing a color filter substrate of the present invention.
  • the embodiment of the invention provides a color film substrate, a display device and a method for manufacturing the color film substrate.
  • a quarter-refractive film that converts linearly polarized light into circularly polarized light is added to the color filter substrate, and each color-transmitting region in the color film can transmit a circle of a corresponding color Polarized light and can be reversed The circularly polarized light of the remaining colors is emitted.
  • the reflected circularly polarized light can enter the backlight, and is reused by the scattering of the diffusion film in the backlight and the reflection of the reflective film, thereby reducing the light passage.
  • the loss of the color film substrate greatly improves the light utilization efficiency of the backlight.
  • the display panel comprises a color film substrate comprising a black matrix and a color photoresist having three primary colors of red, green and blue, the display panel having a plurality of pixels, each pixel having a plurality of sub-pixel units of different colors, black
  • the matrix has a plurality of open areas corresponding to the sub-pixel units of the display panel, and the color photoresist is filled in the open area of the black matrix.
  • the black matrix is consistent with the existing black matrix.
  • the color filter substrate includes:
  • the color film 19 on a side of the quarter retardation film 18 facing away from the substrate substrate 16, the color film 19 having different color transmission regions, each of the color transmission regions transmitting circularly polarized light of a corresponding color and Reflects the circularly polarized light of the remaining colors.
  • a quarter-replacement film 18 for converting linearly polarized light into circularly polarized light is added to the color filter substrate, and each color of the color film 19 is added.
  • the transmissive area can transmit the circularly polarized light of the corresponding color and can reflect the circularly polarized light of the remaining colors. Therefore, according to the reversible principle of the optical path, the reflected circularly polarized light can enter the backlight 11 and be scattered and reflected by the diffusing film in the backlight. The reflection of the film is reused, thereby reducing the loss of light through the color filter substrate and greatly improving the light utilization efficiency of the backlight.
  • the color film may be a film formed by a cholesteric liquid crystal in a cholesteric liquid crystal, and the cholesteric liquid crystal film has a function of reflecting circularly polarized light;
  • the material of the black matrix 15 may be selected from a photosensitive type containing a carbon black material.
  • Resin, the material of the base substrate 16 may be selected from transparent glass, transparent resin, or the like.
  • the current color film substrate with color resist has a utilization rate of about 30% for the light source, and the color film substrate using the invention can achieve a light source utilization rate of about 50% to 60%. 3 is used to explain the principle that the color filter substrate of the present invention can improve the utilization ratio of the backlight.
  • FIG. 3 is used to explain the principle that the color filter substrate of the present invention can improve the utilization ratio of the backlight.
  • FIG. 3 is a schematic diagram of the light path of the display panel according to an embodiment of the present invention, taking the color film of the three primary colors of red, green and blue as an example, as shown in FIG.
  • the natural light from the backlight passes through the polarizer! 2 becomes linearly polarized light, and the linearly polarized light is transformed by 90 degrees after passing through the array substrate 13 and the liquid crystal layer 14, and a part of the light is blocked by the black matrix 15, and then passed through the base substrate 16 and the quarter retardation film.
  • the film 18 becomes circularly polarized light
  • the color film 19 can transmit circularly polarized light of corresponding sub-pixels and can reflect light of other colors, such as red sub-pixels (R) can transmit red circularly polarized light, reflect green circularly polarized light, and
  • R red sub-pixels
  • the blue circularly polarized light, the reflected green circularly polarized light and the blue circularly polarized light pass through the liquid crystal cell again into the backlight, reflect the light through the reflective film 21, enter the diffusion film 22, and pass through the liquid crystal cell again. Therefore, the light is improved as shown in FIG. 4, which is a schematic structural view of a display panel including another color film substrate of the present invention.
  • the color filter substrate of another embodiment of the present invention further includes an analyzer 17 between the substrate substrate 16 and the quarter retardation film 18.
  • an analyzer ⁇ is added between the substrate substrate 16 and the quarter retardation film 18, and the linearly polarized light emitted from the liquid crystal layer 14 can be converted to be perpendicular to a quarter.
  • the normal linearly polarized light of the retardation film 18 facilitates the conversion of the linearly polarized light into circularly polarized light by the quarter retardation film 18, thereby facilitating the transmission and reflection of the circularly polarized light by the color film 19, thereby improving the backlight. Light utilization.
  • the angle between the slow axis of the quarter retardation diaphragm 18 and the transmission axis of the analyzer 17 is
  • the light passes through the analyzer sheet and becomes linearly polarized light, and the angle between the quarter-reciprocal diaphragm 18 and the transmission axis of the analyzer sheet is 45H.
  • the light of the film 17 is all converted into circularly polarized light, which is beneficial to the reflection of the circularly polarized light by the color film, and further improves the utilization of the backlight, and the light transmission of the quarter retardation film 18 and the analyzer 17 is improved.
  • the angle of the shaft is not 45°, and the quarter-replacement diaphragm 18 converts the linearly polarized light transmitted through the analyzer 17 into elliptically polarized light, which is equivalent to the superposition of linearly polarized light and circularly polarized light. Therefore, the color film can only reflect the circularly polarized light in the elliptically polarized light, and at this time, the utilization efficiency of the backlight is lowered.
  • the quarter-resonance diaphragm is a quarter-wave plate to further illustrate the principle of efficient use of light: 0
  • the polarized light is vertically polarized
  • the vertical linearly polarized light becomes right-handed circularly polarized light
  • a region that transmits red right-handed circularly polarized light can transmit red right-handed circularly polarized light, reflect green-blue right-handed circularly polarized light, and reflect right-handed circular polarization in the region of the color film.
  • the light becomes left-handed circularly polarized light ⁇ 1 ; after a quarter-wave plate
  • the light is returned to the diffusion film 22 of the backlight through the liquid crystal cell, and is reused by the reflection of the reflection film 21.
  • the color film 19 comprises two layers of cholesteric liquid crystal film, and each layer of the cholesteric liquid crystal film comprises a strip-shaped region which is continuously arranged and reflects the circularly polarized light of the red, green and blue primary colors respectively.
  • the width of the strip-shaped region is a sub-pixel width, and the strip-shaped regions corresponding to the positions of the two layers of cholesteric liquid crystal film reflect circularly polarized light of different primary colors.
  • the color film 19 includes two layers of cholesteric liquid crystal film. Due to the presence of the cholesteric liquid crystal spiral structure, selective reflection light can be realized by adjusting the pitch of the liquid crystal, as shown in FIG. , G, B_ respectively indicate that the sub-pixel region can reflect red circularly polarized light, green circularly polarized light, and blue circularly polarized light, and thus, the composite cholesteric liquid crystal film can reflect green circularly polarized light and blue circularly polarized light.
  • 1_ and composite cholesteric liquid crystal film can reflect blue circularly polarized light and red circularly polarized light, and transmit green circularly polarized light, J3 ⁇ 4 iI composite cholesteric liquid crystal
  • the film can reflect the red circularly polarized light and the green circularly polarized light, and transmits the blue circularly polarized light. Therefore, the two-layer cholesteric liquid crystal film can be used to realize the ffi of the color film, which has the function of reflecting light and reflecting The returned light is again utilized by the action of the reflective film, thereby greatly improving the light gain rate of the backlight.
  • the cholesteric liquid crystal film comprises o-methyl 4-(6-(acryloyloxy)hexyloxy)benzoate
  • a mixed solution of a base hydroquinone diester and 4-(4-pentylcyclohexyl)-benzoic acid-(1R) 1-phenyl 4,2 ethylene glycol diester is obtained.
  • C6M 4-(6(acryloyloxy)hexyloxy: benzoic acid o-methylhydroquinone diester
  • ZLI-4572 4-(4-pentyl ring) ⁇ > ⁇ benzoic acid-(1R 1 -phenyl-!,2-ethylene glycol diester referred to as ZLI-4572, purchased from Merck, is a right-handed chiral molecule, by adjusting both The weight ratio of the formed cholesteric liquid crystal film can reflect light of different wavelengths.
  • the weight ratio of C6M and ZLI4572 is 93.7:6, and the cholesteric liquid crystal film formed at 3 can reflect the red light of ⁇ near 756 nm.
  • the weight ratio of C6M and ZLI 4572 is 91, 0:9, and the cholesteric liquid crystal film formed at 0 can reflect the green light of ⁇ near 550 nm, and the cholesteric liquid crystal formed when the weight ratio of C6M and ZLI4572 is 87, 8:12.2.
  • the film can reflect blue light having a ⁇ near 400 tim.
  • the cholesteric liquid crystal film preferably further comprises a photoinitiator having a mass fraction of 5%, and the photoinitiator is various, for example, the photoinitiator is 2,2-dimethoxy.
  • the color film 19 further comprises a transparent substrate carrying the color film body.
  • the color film is thin and needs to be fabricated on a transparent substrate to be conveniently mounted on the color film substrate.
  • the material of the transparent substrate may be acrylic material, cellulose acetate, etc., which can be used for Pf ⁇ .
  • a transparent material for the film may be acrylic material, cellulose acetate, etc., which can be used for Pf ⁇ .
  • Embodiments of the present invention provide a display device including any of the above color film substrates. Since the color filter substrate can transmit light or reflect light, the reflected light is again used by the reflective film in the backlight, thereby improving the light utilization efficiency of the backlight.
  • the type of display device is not limited, and may be, for example, TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In-Plane-Switdiing) mode, and FFS (Fringe Field Switching). , fringe field switch) mode, etc.
  • the display device of the present invention can also be an OGS (One Glass Solution) display device, which can better meet the demand for ultra-thinness of the smart terminal and further improve the display effect.
  • the IPS mode and the FFS mode set the polarization axis of the analyzer to be generally 90°
  • the TN mode sets the transmission axis of the analyzer to be 135°.
  • the quarter retardation film is set. The angle between the slow axis of the sheet and the transmission axis of the analyzer is 45°.
  • the display device may specifically be: a product or a component having any display function, such as a liquid crystal panel, an electronic paper, an OLED panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or the like.
  • a product or a component having any display function such as a liquid crystal panel, an electronic paper, an OLED panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or the like.
  • the embodiment of the present invention further provides a method for manufacturing a color filter substrate, comprising: step 101, forming a black matrix on one side of the substrate;
  • Step 102 attaching a quarter retardation film on the other surface of the substrate
  • Step 103 applying a color film on the quarter retardation film, the color film having different color transmission regions, each of the color transmission regions transmitting the circularly polarized light of the corresponding color and reflecting the circularly polarized light of the remaining colors .
  • the method further comprises: before attaching the quarter retardation film to the other surface of the substrate substrate:
  • a polarizer is attached to the other surface of the base substrate.
  • the angle between the slow axis of the quarter-replacement diaphragm and the transmission axis of the analyzer is 45 °.
  • the angle between the transmission axis of the analyzer and the slow axis of the quarter retardation film is set to 45°, and the through-detection film line can be transmitted.
  • the polarized light is all converted into circularly polarized light, which further improves the utilization efficiency of the backlight.
  • the above-described method of attaching a color film having transmissive regions of different colors on a quarter retardation film comprises the following steps:
  • a transparent substrate having a first layer of a cholyl alcohol liquid crystal film and a second layer of a cholesteric liquid crystal film is attached over the quarter retardation film.
  • the other aspect of attaching the color film having different color transmission regions on the quarter retardation film comprises the following steps:
  • Two transparent substrates having a cholesteric liquid crystal film are staggered by a sub-pixel width to form a matching color film;
  • the alignment color film is attached over the quarter retardation film.
  • the material of the transparent substrate may be cellulose acetate
  • the material of the alignment layer may be polyimide
  • the photoinitiator may be added in the mixed solution, for example, the mass fraction may be 5%. 2,2-Dimethoxy-2-phenylacetophenone was used as a photoinitiator.
  • a color film substrate, a display device, and a method for manufacturing a color film substrate are provided. Due to the improvement of the color film process of the color film substrate, the color film is made of a material having both a transmissive function and a reflective effect.
  • the preferred embodiment of the present invention provides a color film prepared by a cholesteric liquid crystal film. Therefore, the use of such a color film makes the backlight utilization rate of the present invention greatly improved, and the existing color film having a color resist is provided.
  • the utilization ratio of the substrate to the light source is about 30%, and the color film substrate of the invention can achieve a light source utilization rate of about 50% to 60%.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Optical Filters (AREA)

Abstract

一种彩膜基板包括：衬底基板（16）；位于衬底基板（16）一面的黑矩阵（15）；位于衬底基板（16）另一面的四分之一相位差膜片（18）；位于四分之一相位差膜片（18）的背离衬底基板（16）一面上的彩膜（19），彩膜（19）具有不同颜色的透射区域，每一种颜色透射区域透过相应颜色的圆偏振光并可反射其余颜色的圆偏振光。还提供了一种显示装置和一种彩膜基板的制造方法。反射的圆偏振光可以进入背光源被重新利用，降低了光通过彩膜基板的损失，大大提高了背光源的光利用率。

Description

本发明涉及显示技术领域， 特别是涉及一种彩膜基板、 显示装置及一种 彩膜基板的制造方法。
在平板显示装置中， 薄膜晶体管液晶显示器 ( Thin Film Transistor Liquid Crystal Display, 筒称 TFT- LCD)具有体积小、 功耗低、 制造成本相对较低和 无辐射等特点， 在当前的平板显示器市场占据了主导地位。
目前， 如图 i所示， 现有技术的 TFT- LCD结构示意图， TFT- LCD的主 要结构包括背光源 1和液晶模组， 液晶模组主要包括对盒在一起的阵列基板 3和彩膜基板， 以及位于阵列基板 3和彩膜基板之间的液晶层 4, 其中， 彩膜 基板主要包括： 玻璃基板 7、 黑色矩阵 5 (Black Matrix, 简称 BM)和彩色光 阻 6。 TFT- LCD的光路如下： 背光源 1发射的自然光进入起偏片 2， 形成线 偏振光， 线偏振光再经过液晶模组， 由于液晶层 4中液晶分子的扭转使得的 线偏振光的偏振方向改变 90度， 再经过检偏片 8出射线偏振光， 在彩膜基板 中黑色矩阵 5 的主要作用是遮挡杂散光， 防止各亚像素间漏光； 彩色光阻 6 的主要作用是利用滤光的方式产生红绿蓝 （RGB) 三原色， 每个原色形成一 个亚像素， 再将红绿蓝三原色以不同的强弱比例混合， 从而呈现出各种色彩， 使 TFT- LCD显示出全彩。
液晶按照分子排列种类的不同可以分为向列相液晶、 近晶相液晶和胆甾 相液晶等。 其中， 胆甾相液晶是一类重要的液晶材料， 其具有螺旋结构， 可 以选择性的反射光。 反射光的波宽用 Δλ表示， Δλ::::ΔηΡίΧ)8θ, Δη:::Μ」―， 其 中， ^和 r 分别为平行和垂直于入射光方向的折射率， Θ表示入射方向与螺 旋轴之间的夹角， P 表示螺距； 在反射波带以外， 胆 相液晶不会对光波的 振幅和偏振状态产生影响。 一般而言， 无色的有机化合物的 Δη值在 0.3〜0.4 之间，因此，胆甾相液晶的反射波宽 Δλ在可见光区域被限制在几十纳米之内， 因此， 通过调整胆甾相液晶的螺距 Ρ可以实现宽波反射。 现有的彩膜基板通过滤光的方式形成出射光， 导致较多的光损失， 使得 背光源的光利用率较低。
本发明的目的是提供一种彩膜基板、 显示装置及一种彩膜基板的制造方 法， 用以降低光通过彩膜基板的损失， 提高背光源的光利用率。
本发明的彩膜基板用于显示面板， 所述显示面板上具有多个像素， 每个 像素中具有多个颜色不同的亚像素单元， 所述彩膜基板包括：
衬底基板；
位于所述衬底基板一面上的黑矩阵；
位于所述衬底基板另一面上的四分之一相位差膜片；
位于所述四分之一相位差膜片的、 背离所述衬底基板的一面上的彩膜， 所述彩膜具有不同颜色透射区域， 每一种颜色透射区域透过相应颜色的圆偏 振光并反射其余颜色的圆偏振光。
本发明的显示装置包括前述技术方案所述的彩膜基板。
优选的， 所述彩膜基板还包括位于所述衬底基板和四分之一相位差膜片 之间的检偏片。
较佳的， 所述四分之一相位差膜片的慢轴与所述检偏片的透光轴的夹角 为 45 σ。
优选的， 所述彩膜包括两层胆留醇液晶膜， 每一层胆 醇液晶膜包括连 续排布的、 分别反射红绿蓝三原色圆偏振光的条形区域， 所述条形区域的宽 度为亚像素宽度， 所述两层胆 醇液晶膜位置对应的条形区域反射不同原色 的圆偏振光。
较佳的， 所述胆 醇液晶膜由包含 4- (6- (丙烯酰氧基：己氧基)苯甲酸邻甲 基对苯二酚二酯和 4- (4-戊基环己垸基)-苯甲酸 苯基- 1，2-乙二醇二酯的 混合溶液得到。
较佳的， 所述彩膜还包括承载彩膜本体的透明基材。
本发明的显示装置包括上述任一种所述的彩膜基板。
本发明的彩膜基板的制造方法， 包括： 在衬底基板一面上形成黑矩阵；
在衬底基板另一面上贴附四分之一相位差膜片；
在四分之一相位差膜片之上贴附具有不同颜色透射区域的彩膜。
优选的， 所述在衬底基板另一面上贴附四分之一相位差膜片之前还包 括：
在衬底基板另一面上贴^检偏片。
较佳的， 设置所述四分之一相位差膜片的慢轴与所述检偏片的透光轴的 夹角为 45°。
优选的， 所述在四分之一相位差膜片之上贴附具有不同颜色透射区域的 彩膜包括如下步骤：
在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93.7:6.3、 91.0:9.0 和 87.8: 12.2的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4- (4-戊基 环己垸基)-苯甲酸 - (1R)小苯基 - 1，2-乙二醇二酯的混合溶液， 经紫外光照固化 后形成连续排布的、 分别反射红绿蓝三原色圆偏振光的第一层胆甾醇液晶 膜；
在第一层胆甾醇液晶膜上按照亚像素宽度涂覆重量比分别为 91.0:9.0、 87,8: 12.2和 93,7:6.3的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯 和 4— (4-戊基环己垸基)-苯甲酸 - 苯基- U-乙二醇二酯的混合溶液， 经紫 外光照固化后形成连续排布的、 分别反射绿蓝红三原色圆偏振光的第二层胆 甾醇液晶膜；
在四分之一相位差膜片之上贴附具有第一层胆 ffl醇液晶膜和第二层胆甾 醇液晶膜的透明基材。
优选的， 所述在四分之一相位差膜片之上贴附具有不同颜色透射区域的 彩膜包括如下步骤：
在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93,7:6,3、 91.0:9.0 和 87,8: 122的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4- (4-戊基 环己垸基)-苯甲酸 苯基- 1,2-乙二醇二酯的混合溶液， 经紫外光照固化 后形成连续排布的、 分别反射红绿蓝三原色圆偏振光的胆甾醇液晶膜； 将两个具有胆甾醇液晶膜的透明基材错开一个亚像素宽度迸行贴附， 形 成对位的彩膜；
在四分之一相位差膜片之上贴附所述对位的彩膜。
在本发明技术方案中， 由于在彩膜基板中增加了将线偏振光转变为圆偏 振光的四分之一相位差膜片， 并且彩膜中每一种颜色透射区域可透过相应颜 色的圆偏振光并可反射其余颜色的圆偏振光， 因此， 根据光路可逆原理， 反 射的圆偏振光可以进入背光源， 再经背光源中扩散膜的散射和反射膜的反射 后被重新利用， 因此， 降低了光通过彩膜基板的损失， 大大提高了背光源的
图 1为现有技术的 TFTiCD结构示意图；
图 2为包括本发明一实施例的彩膜基板的显示面板结构示意图； 图 3为本发明一实施例的显示面板光路图；
图 4为包括本发明另一实施例的彩膜基板的显示面板结构示意 ^ 图 5为本发明的彩膜结构示意图；
图 6为本发明的彩膜基板的制造方法的实施例流程示意图。
附图标记：
1背光源 2-起偏片 3-阵列基板 4-液晶层 5-黑矩阵
6-彩色光阻 7玻璃基板 8-检偏片 11背光源 12起偏片
13-阵列基板 14-液晶层 15-黑矩阵 16-衬底基板 Π-检偏片
18-四分之一相位差膜片 19-彩膜 21-反射膜 22-扩散膜
为了降低光通过彩膜基板的损失， 提高背光源的光利用率， 本发明实施 例提供了一种彩膜基板、 显示装置及一种彩膜基板的制造方法。 在该技术方 案中， 由于在彩膜基板中增加了将线偏振光转变为圆偏振光的四分之一相位 差膜片， 并且彩膜中每一种颜色透射区域可透过相应颜色的圆偏振光并可反 射其余颜色的圆偏振光， 因此， 根据光路可逆原理， 反射的圆偏振光可以进 入背光源， 再经背光源中扩散膜的散射和反射膜的反射后被重新利用， 因 此， 降低了光通过彩膜基板的损失， 大大提高了背光源的光利用率。 为使本 发明的目的、 技术方案和优点更加清楚， 以下列举具体实施例对本发明作迸 一步详细说明。
显示面板包括彩膜基板和阵列基板， 彩膜基板包括黑矩阵和具有红绿蓝 三原色的彩色光阻， 显示面板上具有多个像素， 每个像素中具有多个颜色不 同的亚像素单元， 黑矩阵具有与显示面板的亚像素单元一一对应的多个开口 区域， 彩色光阻填充于黑矩阵的开口区域， 在本发明的技术方案中， 黑矩阵 和现有的黑矩阵一致。
如图 2所示， 本发明显示面板的结构示意图， 其为本发明彩膜基板的一 实施例， 所述彩膜基板包括：
衬底基板 16;
位于衬底基板 16—面上的黑矩阵 15;
位于衬底基板 16另一面上的四分之一相位差膜片 18;
位于四分之一相位差膜片 18的、 背离衬底基板 16的一面上的彩膜 19, 彩膜 19 具有不同颜色透射区域， 每一种颜色透射区域透过相应颜色的圆偏 振光并可反射其余颜色的圆偏振光。
在本发明实施例中， 如图 2所示， 由于在彩膜基板中增加了将线偏振光 转变为圆偏振光的四分之一相位差膜片 18， 并且彩膜 19中每一种颜色透射 区域可透过相应颜色的圆偏振光并可反射其余颜色的圆偏振光， 因此， 根据 光路可逆原理， 反射的圆偏振光可以进入背光源 11 , 再经背光源中扩散膜的 散射和反射膜的反射后被重新利用， 因此， 降低了光通过彩膜基板的损失， 大大提高了背光源的光利用率。 在本发明技术方案中， 彩膜可以为胆甾相液 晶中的胆甾醇液晶形成的薄膜， 胆甾醇液晶膜具有反射圆偏振光的作用； 黑 矩阵 15的材质可选择包含炭黑材料的感光型树脂， 衬底基板 16的材质可选 择透明玻璃、 透明树脂等等。 现有的具有彩色光阻的彩膜基板对光源的利用 率为 30%左右， 而使用该发明的彩膜基板对光源利用率能达到 50%〜60%左 右。 结合图 3解释本发明的彩膜基板可以提高背光源利用率的原理， 图 3为 本发明一实施例的显示面板光路图， 以红绿蓝色三原色的彩膜为例， 如图 3 所示， 背光源发出的自然光经过起偏片 ！2 变为线偏振光， 该线偏振光经过 阵列基板 13和液晶层 14后偏振方向转变了 90度， 经过黑矩阵 15遮挡了部 分光， 再经过衬底基板 16和四分之一相位差膜片 18变为圆偏振光， 彩膜 19 可以透射对应亚像素的圆偏振光， 并且能反射其它颜色的光， 如红色亚像素 ( R)可以透过红色圆偏振光， 反射绿色圆偏振光和蓝色圆偏振光， 反射回去 的绿色圆偏振光和蓝色圆偏振光再次经过液晶盒进入背光源， 通过反射膜 21 对光的反射， 再进入扩散膜 22， 又一次经过液晶盒被利用， 因此， 提高了光 如图 4所示， 包括本发明另一种彩膜基板的显示面板结构示意图。 本发 明另一实施例的彩膜基板还包括位于衬底基板 16和四分之一相位差膜片 18 之间的检偏片 17。
在本发明实施例中， 在衬底基板 16和四分之一相位差膜片 18之间增加 一个检偏片 Π， 可以将从液晶层 14 出射的线偏振光转换为垂直于四分之一 相位差膜片 18的法向的线偏振光， 利于四分之一相位差膜片 18将线偏振光 转换为圆偏振光， 进而利于彩膜 19 对圆偏振光进行透射和反射， 提高背光 源的光利用率。
较佳的， 四分之一相位差膜片 18的慢轴与检偏片 17的透光轴的夹角为
45。。
在本发明实施例中， 光透过检偏片 Π 后变为线偏振光， 四分之一相位 差膜片 18与检偏片 Π的透光轴的夹角为 45H 能将透过检偏片 17的光全 部转化为圆偏振光， 这样就利于彩膜对圆偏振光的反射， 进一歩提高背光源 的利用率， 当四分之一相位差膜片 18与检偏片 17的透光轴的夹角不为 45° 寸， 四分之一相位差膜片 18 将透过检偏片 17 的线偏振光转化为椭圆偏振 光， 椭圆偏振光相当于线偏振光和圆偏振光的叠加， 因此， 彩膜只能将椭圆 偏振光中的圆偏振光反射， 这时， 背光源的利用效率有所降低。
针对优选的实施例， 以四分之一相位差膜片为四分之一波片来进一步说 明光被高效利用的原理： 0
光线从检偏片 17出射后偏光态为垂直线偏振光， 9
1 i
i 1 」的作用， 垂直线偏振光变为右旋圆偏振光
Figure imgf000009_0001
经过彩膜 19， 以透过红色右旋圆偏振光的区域为例， 在彩膜的该区域可 以透射红色右旋圆偏振光， 反射绿色蓝色右旋圆偏振光， 反射后右旋圆偏振 丄 (―
光变为左旋圆偏振光^ 1 ； 再经过四分之一波片
Figure imgf000009_0002
由光线可逆原理， 光线透过液晶盒返回背光源的扩散膜 22， 再经过反射 膜 21的反射作用而被再次利用。
优选的， 如图 5所示， 彩膜 19包括两层胆甾醇液晶膜， 每一层胆甾醇液 晶膜包括连续排布的、 分别反射红绿蓝三原色圆偏振光反射的条形区域， 所 述条形区域的宽度为亚像素宽度， 所述两层胆 醇液晶膜位置对应的条形区 域反射不同原色的圆偏振光。
在本发明实施例中， 如图 5所示， 彩膜 19包括两层胆 醇液晶膜， 由于 胆甾醇液晶螺旋结构的存在， 通过调节液晶的螺距可以实现选择性反射光， 如图 5所示， 、 G, B_分别表示该亚像素区域可以反射红色圆偏振光、 绿色 圆偏振光和蓝色圆偏振光， 因此， 和 复合的胆甾醇液晶膜可以反射绿色 圆偏振光和蓝色圆偏振光， 而透射出红色圆偏振光， 同理， 1_和 复合的胆 甾醇液晶膜可以反射蓝色圆偏振光和红色圆偏振光， 而透射出绿色圆偏振 光， J¾ iI复合的胆甾醇液晶膜可以反射红色圆偏振光和绿色圆偏振光， 而 透射出蓝色圆偏振光， 因此， 采用这样两层胆留醇液晶膜可以实现彩膜的作 ffi , 由于其具有反射光的作用， 反射回去的光经反射膜的作用再一次被利 用， 因此， 大大提高了背光源的光利 ^率。
优选的， 所述胆 醇液晶膜由包含 4- (6— (丙烯酰氧基)己氧基)苯甲酸邻甲 基对苯二酚二酯和 4- (4戊基环己垸基)-苯甲酸 -(1R) 1 -苯基 4，2乙二醇二酯的 混合溶液得到。
在本发明实施例中， 4- (6 (丙烯酰氧基)己氧基：苯甲酸邻甲基对苯二酚二 酯简称为 C6M, 作为光聚合单体， 4- (4-戊基环己垸基 >■苯甲酸 -(1R 1 -苯基 -!，2-乙二醇二酯简称为 ZLI- 4572， 购自默克公司， 为一种右旋手性分子， 通 过调节这两者的重量比形成的胆甾醇液晶膜， 可以实现对不同波长的光进行 反射， 如 C6M和 ZLI4572的重量比为 93.7:6,3时形成的胆甾醇液晶膜可以 反射 λ在 756nm附近的红光， C6M和 ZLI 4572的重量比为 91 ,0:9,0时形成 的胆甾醇液晶膜可以反射 λ在 550nm附近的绿光， C6M和 ZLI4572的重量 比为 87,8:12.2时形成的胆甾醇液晶膜可以反射 λ在 400tim 近的蓝光。 该胆 甾醇液晶膜优选还包括质量分数为 5%的光起始剂， 光起始剂有多种， 例如 光起始剂为 2,2-二甲氧基- 2-苯基苯乙酮。
较佳的， 所述彩膜 19还包括承载彩膜本体的透明基材。
在本发明实施例中， 彩膜很薄， 需要制作在透明基材上以方便安装于彩 膜基板上， 这类透明基材的材质可以为亚克力材料、 醋酸纤维素等可以用 于贴 Pf†膜的透明材料。
本发明实施例提供一种显示装置， 包括上述的任一种彩膜基板。 由于上 述的彩膜基板可以透射光也可以反射光， 反射回去的光经背光源中的反射膜 又再一次被利用， 因此， 提高了背光源的光利用率。
显示装置的类型不限， 例如可以为 TN (Twisted Nematic， 扭曲向列）模 式、 VA (Vertical Alignment, 垂直取向) 模式、 IPS (In- Plane- Switdiing, 平 面方向转换） 模式和 FFS (Fringe Field Switching, 边缘场开关） 模式等。 本 发明显示装置也可以为 OGS (One Glass Solution, 一体化触控） 显示装置， 能够较好的满足智能终端超薄化的需求， 并进一步提升显示效果。 其中， IPS模式和 FFS模式设置检偏片的透光轴一般为 90°, TN模式设置检偏片的 透光轴为 135°, 在较佳的实施方式中， 设置四分之一相位差膜片的慢轴与检 偏片的透光轴的夹角为 45°。
所述显示装置具体可以为： 液晶面板、 电子纸、 OLED面板、 液晶电视、 液晶显示器、 数码相框、 手机、 平板电脑等具有任何显示功能的产品或部件。 如图 6所示， 本发明实施例还提供一种彩膜基板的制造方法， 包括： 步骤 101、 在衬底基板一面上形成黑矩阵；
步骤 102、 在衬底基板另一面上贴附四分之一相位差膜片；
步骤 103、 在四分之一相位差膜片之上贴 彩膜， 所述彩膜具有不同颜 色透射区域， 每一种颜色透射区域透射相应颜色的圆偏振光并可反射其余颜 色的圆偏振光。
在本发明彩膜基板的制造方法中， 优选的， 所述在衬底基板另一面上贴 附四分之一相位差膜片之前还包括：
在衬底基板另一面上贴附检偏片。
较佳的， 设置所述四分之一相位差膜片的慢轴与所述检偏片的透光轴的 夹角为 45 ° 。
在本发明实施例中， 制作彩膜基板时， 设置检偏片的透光轴与四分之一 相位差膜片的慢轴的夹角为 45 ° , 这时可以将透过检偏片线偏振光全部转化 为圆偏振光， 进一步提高了背光源的利用效率。
在本发明彩膜基板的制造方法中， 所述在四分之一相位差膜片之上贴附 具有不同颜色透射区域的彩膜的一种方案包括如下步骤：
在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93.7:6.3、 91.0:9.0 和 87.8: 12.2的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4- (4-戊基 环己垸基)-苯甲酸 - (1R)小苯基 - 1，2-乙二醇二酯的混合溶液， 经紫外光照固化 后形成连续排布的、 分别反射红绿蓝三原色圆偏振光的第一层胆甾醇液晶 膜；
在第一层胆甾醇液晶膜上按照亚像素宽度涂覆重量比分别为 91.0:9.0、 87,8: 12.2和 93,7:6.3的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯 和 4— (4-戊基环己垸基)-苯甲酸 - 苯基- U-乙二醇二酯的混合溶液， 经紫 外光照固化后形成连续排布的、 分别反射绿蓝红三原色圆偏振光的第二层胆 甾醇液晶膜； 以及
在四分之一相位差膜片之上贴附具有第一层胆 ffl醇液晶膜和第二层胆甾 醇液晶膜的透明基材。 在本发明彩膜基板的制造方法中， 所述在四分之一相位差膜片之上贴附 具有不同颜色透射区域的彩膜的另一种方案包括如下步骤：
在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93,7:6.3、 91.0:9,0 和 87.8: 12.2的 4- (6 -(丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4- (4-戊基 环己烷基)-苯甲酸(1R) 1苯基- !，2-乙二醇二酯的混合溶液， 经紫外光照固化 后形成连续排布的、 分别反射红绿蓝三原色圆偏振光的胆甾醇液晶膜；
将两个具有胆甾醇液晶膜的透明基材错开一个亚像素宽度迸行贴附， 形 成对位的彩膜； 以及
在四分之一相位差膜片之上贴附所述对位的彩膜。
在本发明实施例中， 透明基材的材料可以选用≡醋酸纤维素， 取向层的 材料可以选用聚酰亚胺， 混合溶液中可以增加光起始剂， 例如， 可以选用质 量分数为 5%的 2,2-二甲氧基- 2-苯基苯乙酮作为光起始剂。
在本发明上述实施例中， 提供了彩膜基板、 显示装置及彩膜基板的制造 方法， 由于对彩膜基板彩膜工艺的改进， 彩膜采用既具有透射作用又具有反 射作用的材料制成， 本发明优选实施例提供的是胆 醇液晶膜制备的彩膜， 因此， 采用这样的彩膜使得本发明的背光源利用率有了较大的提高， 现有的 具有彩色光阻的彩膜基板对光源的利用率为 30%左右， 而使 ^该发明的彩膜 基板对光源利用率能达到 50%〜60%左右。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

1、 一种彩膜基板， 其特征在于， 包括：
衬底基板；
位于所述衬底基板一面上的黑矩阵；
位于所述衬底基板另一面上的四分之一相位差膜片； 以及
位于所述四分之一相位差膜片的、背离所述衬底基板的一面上的彩膜， 所 述彩膜具有不同颜色透射区域， 每一种颜色透射区域透过相应颜色的圆偏振 光并反射其余颜色的圆偏振光。
2、 如权利要求 1所述的彩膜基板， 其特征在于， 还包括位于所述衬底基 板和四分之一相位差膜片之间的检偏片。
3、 如权利要求 2所述的彩膜基板， 其特征在于， 所述四分之一相位差膜 片的慢轴与所述检偏片的透光轴的夹角为 45 。
4、 如权利要求 1〜3 中任一项所述的彩膜基板， 其特征在于， 所述彩膜包 括两层胆 醇液晶膜， 每一层胆 醇液晶膜包括连续排布的、分别反射红绿蓝 三原色圆偏振光的条形区域， 所述条形区域的宽度为亚像素宽度， 所述两层 胆甾醇液晶膜位置对应的条形区域反射不同原色的圆偏振光。
5、 如权利要求 4所述的彩膜基板， 其特征在于， 所述胆甾醇液晶膜由包 含 4 (6 -- (丙烯酰氧基）己氧基)苯甲酸邻甲基对苯二酚二酯和 4-- (4 戊基环己垸 基) --苯甲酸- - ( 1R) - 1 - -苯基- - - 1， 2--乙二醇二酯的混合溶液得到。
6、 如权利要求 4所述的彩膜基板， 其特征在于， 所述彩膜还包括承载彩 膜本体的透明基材。
7、 一种显示装置， 其特征在于， 包括如权利要求 1〜6任一项所述的彩膜 基板。
8、 一种彩膜基板的制造方法， 其特征在于， 包括：
在衬底基板一面上形成黑矩阵；
在衬底基板另一面上贴 ^四分之一相位差膜片； 以及
在四分之一相位差膜片之上贴附彩膜， 所述彩膜具有不同颜色透射区 域， 每一种颜色透射区域透过相应颜色的圆偏振光并反射其余颜色的圆偏振
9、 如权利要求 8所述的制造方法， 其特征在于， 所述在衬底基板另一面 上贴附四分之一相位差膜片之前还包括：
在衬底基板另一面上贴附检偏片。
10、 如权利要求 9所述的制造方法， 其特征在于， 设置所述四分之一相位 差膜片的慢轴与所述检偏片的透光轴的夹角为 45 ° 。
11、 如权利要求 8〜10中任一项所述的制造方法， 其特征在于， 所述在四 分之一相位差膜片之上贴附具有不同颜色透射区域的彩膜包括以下步骤： 在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93. 7 : 6„3、 91. 0 : 9. 0 和 87. 8 : 12. 2的 4 (6 (：丙烯酰氧基）己氧基)苯甲酸邻甲基对苯二酚二酯和 4- - (4 戊基环己垸基) --苯甲酸 (1R) - 1--苯基- - 1， 2--乙二醇二酯的混合溶液， 经紫外光 照固化后形成连续排布的、分别反射红绿蓝三原色圆偏振光的第一层胆 醇液 晶膜；
在第一层胆甾醇液晶膜上按照亚像素宽度涂覆重量比分别为 91.0:9.0、 87.8: 12,2和 93.7:6.3的 4 (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4 (4-戊基环己垸基)-苯甲酸(1 R 1-苯基- 1,2乙二醇二酯的混合溶液， 经紫外 光照固化后形成连续排布的、分别反射绿蓝红三原色圆偏振光的第二层胆甾醇 液晶膜； 以及
在四分之一相位差膜片之上贴^具有第一层胆 醇液晶膜和第二层胆甾 醇液晶膜的透明基材。
12、 如权利要求 8〜10中任一项所述的制造方法， 其特征在于， 所述在四 分之一相位差膜片之上贴 具有不同颜色透射区域的彩膜包括以下步骤： 在透明基材上涂覆取向层；
在取向层上按照亚像素宽度涂覆重量比分别为 93,7:6,3、 91.0:9.0 和 87,8: 12.2的 4- (6- (丙烯酰氧基)己氧基)苯甲酸邻甲基对苯二酚二酯和 4- (4-戊基 环己垸基)-苯甲酸 -(I R)-1-苯基- 1,2乙二醇二酯的混合溶液， 经紫外光照固化 后形成连续排布的分别反射红绿蓝 原色圆偏振光的胆 醇液晶膜；
将两个具有胆留醇液晶膜的透明基材错开一个亚像素宽度进行贴附， 形 成对位的彩膜； 以及
在四分之一相位差膜片之上贴附所述对位的彩膜。
PCT/CN2013/081169 2013-06-20 2013-08-09 彩膜基板、显示装置及彩膜基板的制造方法 Ceased WO2014201758A1 (zh)

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