WO2017139999A1 - 垂直光配向方法及液晶显示面板的制作方法 - Google Patents

垂直光配向方法及液晶显示面板的制作方法 Download PDF

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Publication number
WO2017139999A1
WO2017139999A1 PCT/CN2016/074621 CN2016074621W WO2017139999A1 WO 2017139999 A1 WO2017139999 A1 WO 2017139999A1 CN 2016074621 W CN2016074621 W CN 2016074621W WO 2017139999 A1 WO2017139999 A1 WO 2017139999A1
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substrate
sub
light
alignment
regions
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French (fr)
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马超
马小龙
李泳锐
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US15/031,277 priority Critical patent/US10120239B2/en
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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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • 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
    • 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
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
    • 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
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/13624—Active matrix addressed cells having more than one switching element per pixel
    • 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
    • G02F1/133354—Arrangements for aligning or assembling substrates
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a vertical light alignment method and a method for fabricating a liquid crystal display panel.
  • Liquid crystal display is one of the most widely used flat panel displays.
  • the liquid crystal panel is a core component of liquid crystal displays.
  • the liquid crystal panel usually consists of a color filter substrate (CF Substrate), a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) disposed between the two substrates. ) constitutes.
  • a pixel electrode and a common electrode are respectively disposed on the array substrate and the color filter substrate.
  • liquid crystal displays As a leader in flat panel displays, liquid crystal displays have gradually occupied a dominant position in the display field due to their low power consumption, excellent picture quality and high production yield.
  • the display mode of the liquid crystal panel is mainly divided into a phase change (PC), a twisted nematic (TN), and a vertical alignment (VA).
  • PC phase change
  • TN twisted nematic
  • VA vertical alignment
  • IPS Plane Switching
  • FFS fringe field switching
  • the alignment technique widely used in the production of liquid crystal display panels is the rubbing alignment method.
  • the brush alignment method refers to the contact-oriented mechanical friction on the surface of the polymer with a flannel roller, and the energy supplied from the surface of the friction polymer causes the polymer main chain to be aligned due to the extension, thereby controlling the alignment of the liquid crystal.
  • the brush alignment method can provide a strong alignment ability of liquid crystal molecules, but in the process of brushing, due to the contact friction of the flannel, static electricity and particle contamination are generated, and these pollutions often directly cause damage to the liquid crystal element. Therefore, both academics and the industry are constantly researching and improving the non-contact alignment method. In addition to avoiding the contamination of static electricity and particles, it is also easier to control the alignment of liquid crystal molecules.
  • non-contact alignment method it is possible to perform small-area alignment according to some specific pattern masks, thereby producing some liquid crystal components with special requirements.
  • One of the most well-known non-contact alignment methods is an alignment agent that illuminates a sensitizer with a line of ultraviolet light, which is called ultraviolet alignment method, referred to as optical alignment.
  • the light alignment is irradiated on the high molecular polymer alignment film having the sensitizer by ultraviolet light having a linear polarization, so that the high molecular polymer has an alignment ability.
  • the utility model has the advantages that the contamination of the surface of the glass substrate can be avoided, the alignment of the small area can be performed, the alignment of the light shield can be performed, and the angle of the incident light and the length of the irradiation time can be used to control the parameters of the liquid crystal unit, such as the pretilt angle. , surface orientation strength, etc.
  • the photo-alignment agent is a polymer composed of a plurality of small molecule bonds. By hard baking or illuminating, the monomers are bonded to each other to form a macromolecule. In the liquid crystal alignment, in order to allow liquid crystal molecules to be aligned along the direction in which the alignment molecules are arranged, the selected monomers are bonded to form long bond molecules.
  • the light alignment technology can realize the state in which all the liquid crystal molecules are tilted integrally along the design direction through the alignment film, so that the liquid crystal molecules are tilted in one direction at the same time after the application of the electric field, and the response speed is improved. Since the protrusions and the slits can be divided into a plurality of regions, the aperture ratio is improved compared to the panel which is originally divided into a plurality of regions by the protrusions, and the light leakage caused by the scattering of the protrusions and the slit portions can be effectively reduced, and the contrast of the panel is improved. .
  • the liquid crystal tilting direction in one sub-pixel can have multiple tilting directions to compensate for the tilt viewing angle characteristics and color shift.
  • the movement of the reticle may cause loss of alignment accuracy and affect panel quality.
  • An object of the present invention is to provide a vertical light alignment method, in which each pixel region is divided into four sub-regions, and an alignment film having four alignment directions can be obtained, that is, the four sub-regions have different alignment directions, and the alignment precision is high.
  • the method is simple and the cost is low.
  • Another object of the present invention is to provide a method for fabricating a liquid crystal display panel, wherein the vertical alignment of the CF substrate and the TFT substrate is performed by the vertical light alignment method described above, and the alignment precision is high, so that the obtained liquid crystal display panel has a wide viewing angle. High penetration, no color shift, high contrast and high resolution.
  • the present invention first provides a vertical light alignment method comprising the following steps:
  • Step 1 Providing a substrate having a plurality of pixel regions arranged in an array; each pixel region is a square, and the pixel region is divided into four equal-sized square sub-regions;
  • Step 2 coating a layer of photo-alignment polymer on the substrate to form a photo-alignment film
  • Step 3 providing a photomask having a plurality of pattern units arranged in an array, wherein the shape of the pattern unit is the same as the shape of the pixel area, and each pattern unit comprises a light transmissive area. And a light-shielding area that is opaque, the shape and size of the light-transmitting area and the light-shielding area are respectively One sub-area on the pixel area and the other three sub-areas have the same shape and size;
  • Step 4 placing the substrate on a rotatable carrying platform, and using the reticle to irradiate the optical alignment film on the substrate with linear ultraviolet light according to a certain irradiation angle. At this time, the linear ultraviolet light is obliquely worn. Passing through the light transmissive area of the reticle to illuminate a sub-area of the plurality of pixel regions, so that the sub-region corresponding to the plurality of pixel regions forms a first alignment direction on the photo-alignment film; The position of the reticle and the direction of the linear ultraviolet light irradiation are always unchanged in the step 4, and the substrate is sequentially rotated three times by 90° through the carrying platform, and the optical alignment film on the substrate is continuously performed after each rotation.
  • the linear ultraviolet light sequentially passes obliquely through the light-transmitting region on the reticle to sequentially illuminate the other three sub-regions of the plurality of pixel regions, thereby corresponding to the plurality of pixel regions
  • the three sub-regions sequentially form second, third, and fourth alignment directions on the photo-alignment film, thereby obtaining an alignment film having four alignment directions, so that each pixel region has four alignment directions.
  • the sub-region is
  • the photo-alignment film is subjected to linear ultraviolet light irradiation according to an irradiation angle between the linear ultraviolet light and the substrate at an angle of 80 to 89.7.
  • the substrate provided in the step 1 is a TFT substrate or a CF substrate.
  • the substrate is rotated in a clockwise or counterclockwise direction.
  • the photo-alignment polymer coated on the substrate is a polyimide material.
  • the invention also provides a method for fabricating a liquid crystal display panel, comprising the following steps:
  • Step 10 Providing a TFT substrate and a CF substrate, wherein the TFT substrate and the CF substrate respectively have a plurality of pixel regions arranged corresponding to each other; each pixel region is a square, and the pixel region is divided into four equal sizes. Sub-regions of squares, which are first, second, third, and fourth sub-regions arranged in clockwise or counterclockwise, respectively;
  • Step 20 applying a layer of photo-alignment polymer on the TFT substrate and the CF substrate to form a photo-alignment film respectively;
  • Step 30 Providing a reticle having a plurality of arrayed pattern units, wherein the pattern unit has the same shape and size as the pixel area, and each pattern unit includes a light transmissive light transmission area. And a light-shielding region that is opaque, the shape and size of the light-transmitting region and the light-shielding region are respectively the same as the shape and size of one sub-region and the other three sub-regions on the pixel region;
  • Step 40 The CF substrate is placed on a rotatable carrying platform, and the optical alignment film on the CF substrate is irradiated with linear ultraviolet light according to a certain irradiation angle by using the photomask. At this time, the linear ultraviolet light is tilted.
  • Step 50 placing the TFT substrate on the carrying platform, and maintaining the position of the reticle and the linear ultraviolet light irradiation direction unchanged in the step 50, using the reticle on the TFT substrate
  • the light alignment film is irradiated with linear ultraviolet light according to a certain irradiation angle.
  • the linear ultraviolet light obliquely passes through the light transmission area of the reticle to correspondingly illuminate the second sub-area or the fourth of the plurality of pixel areas.
  • the substrate is sequentially rotated three times by 90° by the carrier, and the rotation is performed after each rotation
  • the optical alignment film on the TFT substrate continues to be irradiated with linear ultraviolet light, and the linear ultraviolet light sequentially passes obliquely through the light-transmitting region on the reticle to be irradiated on the other three sub-regions of the plurality of pixel regions, thereby
  • the three sub-regions corresponding to the plurality of pixel regions sequentially form a sixth, seventh, and eighth alignment directions on the photo-alignment film;
  • Step 60 the TFT substrate and the CF substrate are paired to obtain a liquid crystal display panel; at this time, the first, second, third, fourth sub-regions on the TFT substrate and the first and the second on the CF substrate 2.
  • the third and fourth sub-regions have a one-to-one correspondence; the optical alignment directions of the first, second, third, and fourth sub-regions on the TFT substrate are respectively the first and the first on the CF substrate Second, the third and fourth sub-areas have a light alignment direction that is perpendicular.
  • the photo-alignment polymer layer is subjected to linear ultraviolet light irradiation according to an irradiation angle between the linear ultraviolet light and the substrate at an angle of 80 to 89.7.
  • the CF substrate is rotated in a clockwise or counterclockwise direction.
  • the TFT substrate is rotated in a clockwise or counterclockwise direction.
  • the invention also provides a vertical light alignment method comprising the following steps:
  • Step 1 Providing a substrate having a plurality of pixel regions arranged in an array; each pixel region is a square, and the pixel region is divided into four equal-sized square sub-regions;
  • Step 2 coating a layer of photo-alignment polymer on the substrate to form a photo-alignment film
  • Step 3 providing a photomask having a plurality of pattern units arranged in an array, wherein the shape of the pattern unit is the same as the shape of the pixel area, and each pattern unit comprises a light transmissive area. And a light-shielding region that is opaque, the shape and size of the light-transmitting region and the light-shielding region are respectively the same as the shape and size of one sub-region and the other three sub-regions on the pixel region;
  • Step 4 placing the substrate on a rotatable carrying platform, and using the reticle to irradiate the optical alignment film on the substrate with linear ultraviolet light according to a certain irradiation angle.
  • linear purple The external light obliquely passes through the light-transmitting region of the reticle to be correspondingly irradiated on a sub-region of the plurality of pixel regions, so that the sub-region corresponding to the plurality of pixel regions forms on the photo-alignment film a direction of alignment; maintaining the position of the reticle and the direction of linear ultraviolet light irradiation are always unchanged in the step 4, and the substrate is sequentially rotated three times by 90° through the carrier, and each time the rotation is performed on the substrate
  • the light-aligning film continues to be irradiated with linear ultraviolet light, and the linear ultraviolet light sequentially passes obliquely through the light-transmitting region on the reticle to sequentially illuminate the other three sub-regions of the plurality of pixel regions,
  • the optical alignment film is subjected to linear ultraviolet light irradiation according to an irradiation angle between the linear ultraviolet light and the substrate at an angle of 80° to 89.7°;
  • the substrate provided in the step 1 is a TFT substrate or a CF substrate.
  • the present invention provides a method for vertical light alignment, which designs a pixel area as a square, and divides each pixel area into four equal-sized sub-areas, and a pattern unit corresponding to the pixel area on the reticle
  • the light transmissive region is composed of a light transmissive region and a light shielding region, wherein the shape and size of the light transmissive region are the same as the shape and size of a subregion of the pixel region, and the photomask is first used to face one of the pixel regions according to a certain illumination angle.
  • the area is irradiated with ultraviolet light to obtain the alignment direction of the sub-area, and then the position of the reticle and the direction of the linear ultraviolet light are kept unchanged.
  • the smear By rotating the substrate, the smear continues to use the reticle to the other three sub-pixel regions according to a certain illumination angle.
  • the regions are sequentially irradiated with ultraviolet light, and the alignment directions of the three sub-regions are sequentially obtained, that is, the alignment directions of the four sub-regions of the pixel region are different from each other. Since the photomask is always stable during the alignment process, the precision loss can be effectively reduced and improved.
  • the vertical alignment of the CF substrate and the TFT substrate is performed by the vertical light alignment method described above, and the alignment precision is high, and the alignment directions of the corresponding sub-regions on the CF substrate and the TFT substrate are perpendicular to each other.
  • the obtained liquid crystal display panel has a wide viewing angle, high penetration, no color shift, high contrast, and high resolution.
  • FIG. 1 is a schematic flow chart of a vertical light alignment method according to the present invention.
  • FIG. 2 is a schematic structural view of a pattern unit on a photomask provided in step 3 of the vertical light alignment method of the present invention
  • step 4 of the vertical light alignment method of the present invention is a schematic diagram of step 4 of the vertical light alignment method of the present invention.
  • FIG. 4 is a schematic view showing the liquid crystal molecules guided by the pixel regions after the vertical light alignment in the step 4 of the vertical light alignment method of the present invention
  • step 4 is a schematic diagram of step 4 of a method for fabricating a liquid crystal display panel of the present invention
  • FIG. 6 is a schematic view showing the alignment directions of the sub-regions on the CF substrate and the TFT substrate in the liquid crystal display panel obtained in the step 6 of the method for fabricating the liquid crystal display panel of the present invention.
  • the present invention provides a vertical light alignment method, comprising the following steps:
  • Step 1 providing a substrate having a plurality of arrayed pixel regions 500 on the substrate; each pixel region 500 is a square, and dividing the pixel region 500 into four equal-sized square sub-regions;
  • the substrate provided in the step 1 is a TFT substrate or a CF substrate.
  • Step 2 coating a layer of photo-alignment polymer on the substrate to form a photo-alignment film
  • the photo-alignment polymer coated on the substrate is a polyimide material.
  • Step 3 providing a reticle 900 having a plurality of arrayed pattern units 910 on the reticle 900.
  • the shape of the pattern unit 910 is the same as the shape of the pixel area 500, as shown in FIG.
  • Each of the pattern units 910 includes a light transmissive light transmissive area 911 and a light transmissive light blocking area 912, and the shape and size of the light transmissive area 911 and the light shielding area 912 are respectively different from a sub-area and the other three on the pixel area 50.
  • the sub-areas have the same shape and size;
  • Step 4 as shown in FIG. 3, the substrate is placed on a rotatable carrying platform, and the optical alignment film on the substrate is irradiated with linear ultraviolet light according to a certain irradiation angle by the reticle 900.
  • the linear ultraviolet light obliquely passes through the light transmitting region 911 of the reticle 900 and is correspondingly irradiated on a sub-region of the plurality of pixel regions 500, so that the sub-region corresponding to the plurality of pixel regions 500 is Forming a first alignment direction on the light alignment film; maintaining the position of the reticle 900 and the linear ultraviolet light irradiation direction are always unchanged in the step 4, and sequentially performing the substrate in a clockwise or counterclockwise direction through the carrier After three rotations of 90°, the linear alignment light on the substrate continues to be irradiated with linear ultraviolet light after each rotation, and the linear ultraviolet light sequentially passes obliquely through the light-transmitting region 911 on the mask 900 to sequentially illuminate the light.
  • the other pixel area 500 On the outer three sub-regions, the three sub-regions corresponding to the plurality of pixel regions 500 sequentially form second, third, and fourth alignment directions on the photo-alignment film, thereby obtaining an alignment film having four alignment directions.
  • the photo-alignment film is subjected to linear ultraviolet light irradiation according to an irradiation angle between the linear ultraviolet light and the substrate at an angle ⁇ of 80° to 89.7°.
  • the pixel region 500 that is aligned by the vertical light can align the liquid crystals, because in the alignment process, the alignment direction formed on the photoalignment film is along the linear ultraviolet light irradiated thereon.
  • the irradiation direction is such that the liquid crystal molecules stand on the substrate at an angle ⁇ with the substrate.
  • the present invention also provides a method for fabricating a liquid crystal display panel, comprising the following steps:
  • Step 10 Providing a TFT substrate and a CF substrate, wherein the TFT substrate and the CF substrate respectively have a plurality of pixel regions 500 arranged in a matrix corresponding to each other; each of the pixel regions 500 is a square, and the pixel region 500 is divided into four.
  • the sub-regions of equal squares are the first, second, third, and fourth sub-regions 501, 502, 503, and 504 arranged in clockwise or counterclockwise, respectively.
  • Step 20 Apply a layer of photo-alignment polymer to the TFT substrate and the CF substrate to form a photo-alignment film.
  • a reticle 900 is provided.
  • the reticle 900 has a plurality of arrayed pattern units 910.
  • the shape of the pattern unit 910 is the same as the shape of the pixel area 500.
  • Each pattern unit 910 includes The light transmissive light-transmissive region 911 and the opaque light-shielding region 912 are formed, and the shape and size of the light-transmitting region 911 and the light-shielding region 912 are respectively different from the shape of one sub-region and three other sub-regions on the pixel region 500. The same size.
  • Step 40 as shown in FIG. 5, the CF substrate is placed on a rotatable carrying platform, and the optical alignment film on the CF substrate is irradiated with linear ultraviolet light according to a certain irradiation angle.
  • the linear ultraviolet light obliquely passes through the light transmitting region 911 of the reticle 900 and correspondingly illuminates the first sub-region 501 of the plurality of pixel regions 500, thereby corresponding to the plurality of pixel regions 500.
  • a sub-region 501 forms a first alignment direction on the photo-alignment film; the position of the reticle 900 and the linear ultraviolet illuminating direction are maintained unchanged in the step 40, and the substrate is sequentially rotated three times by 90° through the carrier.
  • the linear alignment film 700 on the substrate is continuously irradiated with linear ultraviolet light, and the linear ultraviolet light is sequentially obliquely passed through the light transmission region 901 on the mask 900 to be irradiated to the plurality of pixels.
  • the second, third, and fourth sub-regions 502, 503, and 504 corresponding to the plurality of pixel regions 500, respectively, are sequentially Forming a second on the light alignment film The third and fourth alignment directions.
  • the CF substrate is rotated in a clockwise or counterclockwise direction.
  • Step 50 The TFT substrate is placed on the carrying platform, and the position of the reticle 900 and the linear ultraviolet light irradiation direction are maintained unchanged in the step 50, and the TFT substrate is used by the reticle 900.
  • the upper photo-alignment film is irradiated with linear ultraviolet light according to a certain irradiation angle. At this time, the linear ultraviolet light obliquely passes through the light-transmitting region 911 of the reticle 900 to correspondingly illuminate the second of the plurality of pixel regions 500.
  • Step 60 The TFT substrate and the CF substrate are paired to obtain a liquid crystal display panel.
  • the first, second, third, and fourth sub-regions 501 and 502 of the TFT substrate are 503, 504 and the first, second, third, and fourth sub-regions 501, 502, 503, and 504 on the CF substrate have a one-to-one correspondence; the first, second, third, and fourth on the TFT substrate
  • the light alignment directions of the sub-regions 501, 502, 503, and 504 are perpendicular to the optical alignment directions of the first, second, third, and fourth sub-regions 501, 502, 503, and 504 on the CF substrate, respectively.
  • the photo-alignment polymer layer is subjected to linear ultraviolet light irradiation according to an irradiation angle between the linear ultraviolet light and the substrate at an angle of 80 to 89.7.
  • the TFT substrate is rotated in a clockwise or counterclockwise direction.
  • the pixel region can be divided into sub-regions having a plurality of alignment directions without using protrusions and slits, the aperture ratio of the obtained liquid crystal display panel is greatly improved, and the aperture ratio is higher. Penetration, and avoiding light leakage caused by scattering of the slit portion, thereby improving the contrast of the liquid crystal display panel; in addition, since the pixel region is partitioned, there are four liquid crystals corresponding to one pixel region in the liquid crystal display panel. The tilting direction has a wider viewing angle and less color shift; and since the position of the mask 900 is kept stable during the vertical light alignment, the precision loss can be effectively reduced, and the accuracy of exposure and alignment can be improved.
  • the present invention provides a vertical light alignment method in which a pixel area is designed as a square, and each pixel area is divided into four equal-sized sub-areas, and the pattern unit corresponding to the pixel area on the reticle is composed of a light transmissive area and a light shielding area, wherein the shape and size of the light transmissive area The small and the sub-region of the pixel region have the same shape and size.
  • the reticle is irradiated with ultraviolet light to a sub-region of the pixel region according to a certain illumination angle to obtain an alignment direction of the sub-region, and then the reticle is maintained. The position and the direction of the linear ultraviolet light are unchanged.
  • the reticle By rotating the substrate, the reticle is continuously irradiated with ultraviolet light by the other three sub-regions of the pixel region according to a certain illumination angle to obtain the alignment direction of the three sub-regions, that is, the pixel
  • the alignment directions of the four sub-areas of the region are different from each other.
  • the vertical alignment of the CF substrate and the TFT substrate is performed by the vertical light alignment method described above, and the alignment precision is high, and the alignment directions of the corresponding sub-regions on the CF substrate and the TFT substrate are perpendicular to each other.
  • the obtained liquid crystal display panel has wide viewing angle, high penetration, no color shift, and high Contrast and high resolution characteristics.

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Abstract

一种垂直光配向方法和液晶显示面板的制作方法。垂直光配向方法将像素区域（500）设计为正方形，并将每一像素区域划分为四个大小相等的子区域，光罩（900）上对应像素区域（500）的图案单元（910）包括透光区（911）和遮光区（912），其中透光区（911）的形状和大小与像素区域（500）的一子区域的形状和大小相同，首先利用该光罩（900）按照一定的照射角度对像素区域（500）中的一个子区域进行紫外光照射，得到该子区域的配向方向，然后保持光罩（900）的位置和线性紫外光照射方向不变，通过旋转基板，对像素区域（500）的另外三个子区域依次进行紫外光照射，使像素区域（500）具有配向方向互不相同的四个子区域，配向精度高，方法简单，成本低。

Description

垂直光配向方法及液晶显示面板的制作方法 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种垂直光配向方法及液晶显示面板的制作方法。
背景技术
液晶显示器(Liquid Crystal Display，LCD)是目前最广泛使用的平板显示器之一，液晶面板是液晶显示器的核心组成部分。液晶面板通常是由一彩色滤光片基板(Color Filter Substrate，CF Substrate)、一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)以及一配置于两基板间的液晶层(Liquid Crystal Layer)所构成。一般阵列基板、彩色滤光片基板上分别设置像素电极、公共电极。当电压被施加到像素电极与公共电极便会在液晶层中产生电场，该电场决定了液晶分子的取向，从而调整入射到液晶层的光的偏振，使液晶面板显示图像。
作为平板显示器中的佼佼者，液晶显示器由于具有低的功耗、优异的画面品质以及较高的生产良率等性能，目前已经逐渐的占据了显示领域的主导地位。在液晶显示器中，基于液晶的运作模式，液晶面板的显示模式主要分为相变型(phase change，PC)、扭转向列型(twisted nematic，TN)、垂直配向型(Vertical Alignment，VA)、横向电场切换型(In plane Switching，IPS)、及边缘电场转换型(fringe field switching，FFS)等。在这些不同的显示技术中，配向方式又各有不同。目前在液晶显示面板的生产中较为广泛运用的配向技术是磨刷配向(Rubbing alignment)法。磨刷配向法是指在高分子表面用绒布滚轮进行接触式的定向机械摩擦，摩擦高分子表面所供的能量使高分子主链因延伸而定向排列，从而控制液晶配向排列。磨刷配向法可以提供液晶分子较强的配向能力，但是在磨刷的过程中，由于利用绒布接触式的摩擦，因此会产生静电和颗粒的污染，而这些污染往往直接造成液晶元件的损坏。因此不论是学术界还是业界都在不断研究改进非接触式的配向方式，除了可以避免静电和颗粒的污染，也可以比较容易控制液晶分子的配向方式。利用非接触式的配向方式，可以根据一些特定图形的光罩来进行小面积的配向，进而制作一些特别需求的液晶元件。其中最被大家熟知的非接触式配向方法为以线偏紫外光去照射有感光剂的配向剂，称之为紫外光配向法，简称光配向。
光配向利用线性偏极的紫外光照射在具有感光剂的高分子聚合物配向膜上，使得高分子聚合物具有配向能力。其优点为可避免玻璃基板表面的污染、可以进行小面积的配向、透过光罩可作图形的配向、及利用入射光的角度与照射时间的长短，可以控制液晶单元的参数，如预倾角、表面定向强度等。光配向剂为一种聚合物(Polymer)，由许多单体(monomer)小分子键结所组成。通过硬烤或是照光，使得单体间相互键结，形成大分子。在液晶配向中，为了要使液晶分子能够顺着配向分子排列的方向而排列，所选取的单体键结后，形成长键分子。
光配向技术能够通过配向膜实现所有液晶分子沿着设计方向整体倾斜的状态，所以施加电场后液晶分子同时向一个方向倾倒，响应速度得到提升。由于不使用突起和狭缝也能分割成多个区域，因此开口率比原来利用突起分割成多个区域的面板提高，并且能够有效减少在突起和狭缝部分散射导致的漏光，提升面板的对比度。但如果需要考虑到倾斜视角情况下的视角特性以及色偏，就需要对面板进行分区，使得一个子像素内的液晶倾倒方向可以有多个倾倒方向，以补偿倾斜视角特性及色偏。在使用光罩进行面板分区时，由于光罩的移动会导致配向精度的损失，影响面板质量。
发明内容
本发明的目的在于提供一种垂直光配向方法，将每一像素区域分成四个子区域，能够得到具有四个配向方向的配向膜，即使得该四个子区域具有不同的配向方向，配向精度高，方法简单，成本低。
本发明的目的还在于提供一种液晶显示面板的制作方法，采用上述的垂直光配向方法分别对CF基板和TFT基板进行垂直光配向，配向精度高，使所得到的液晶显示面板具有广视角、高穿透、无色偏、高对比和高分辨的特性。
为实现上述目的，本发明首先提供一种垂直光配向方法，包括以下步骤：
步骤1、提供一基板，所述基板上具有数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域；
步骤2、在所述基板上涂布一层光配向聚合物，形成光配向膜；
步骤3、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所 述像素区域上的一个子区域和另外三个子区域的形状大小相同；
步骤4、将所述基板放置于可旋转的承载台上，利用所述光罩对所述基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的一子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤4中均始终不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而依次对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第二、第三、第四配向方向，从而得到具有四种配向方向的配向膜，使每一像素区域具有四种配向方向的子区域。
所述步骤4中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向膜进行线性紫外光照射。
所述步骤1中提供的基板为TFT基板、或CF基板。
所述步骤4中按照顺时针或逆时针方向对所述基板进行旋转。
所述步骤2中，在所述基板上涂布的光配向聚合物为聚酰亚胺材料。
本发明还提供一种液晶显示面板的制作方法，包括以下步骤：
步骤10、提供TFT基板和CF基板，所述TFT基板和CF基板上分别具有相互对应的数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域，分别为按顺时针或逆时针依次排列的第一、第二、第三、第四子区域；
步骤20、在所述TFT基板和CF基板上分别涂布一层光配向聚合物，分别形成光配向膜；
步骤30、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所述像素区域上的一个子区域和另外三个子区域的形状大小相同；
步骤40、将所述CF基板放置于可旋转的承载台上，利用所述光罩对所述CF基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的第一子区域，从而对应于所述数个像素区域的第一子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤40中不变，通过承载台对所述基板依次进行三次90°旋转，每进行一 次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而对应照射在所述数个像素区域的第二、第三、第四子区域上，从而分别对应于所述数个像素区域的第二、第三、第四子区域依次在所述光配向膜上形成第二、第三、第四配向方向；
步骤50、将所述TFT基板放置于所述承载台上，继续保持所述光罩的位置和线性紫外光照射方向在该步骤50中不变，利用所述光罩对所述TFT基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的第二子区域或第四子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第五配向方向；通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对所述TFT基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第六、第七、第八配向方向；
步骤60、将所述TFT基板和CF基板对组，得到液晶显示面板；此时，所述TFT基板上的第一、第二、第三、第四子区域和CF基板上的第一、第二、第三、第四子区域为一一对应；所述TFT基板上的第一、第二、第三、第四子区域的光配向方向，分别和所述CF基板上的第一、第二、第三、第四子区域的光配向方向垂直。
所述步骤40和步骤50中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向聚合物层进行线性紫外光照射。
所述步骤40中，按照顺时针或逆时针方向对所述CF基板进行旋转。
所述步骤50中，按照顺时针或逆时针方向对所述TFT基板进行旋转。
本发明还提供一种垂直光配向方法，包括以下步骤：
步骤1、提供一基板，所述基板上具有数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域；
步骤2、在所述基板上涂布一层光配向聚合物，形成光配向膜；
步骤3、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所述像素区域上的一个子区域和另外三个子区域的形状大小相同；
步骤4、将所述基板放置于可旋转的承载台上，利用所述光罩对所述基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫 外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的一子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤4中均始终不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而依次对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第二、第三、第四配向方向，从而得到具有四种配向方向的配向膜，使每一像素区域具有四种配向方向的子区域；
其中，所述步骤4中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向膜进行线性紫外光照射；
其中，所述步骤1中提供的基板为TFT基板、或CF基板。
本发明的有益效果：本发明提供的一种垂直光配向的方法，将像素区域设计为正方形，并将每一像素区域划分为四个大小相等的子区域，光罩上对应像素区域的图案单元由透光区和遮光区所组成，其中所述透光区的形状和大小与像素区域的一子区域的形状和大小相同，首先利用该光罩按照一定的照射角度对像素区域中的一个子区域进行紫外光照射，得到该子区域的配向方向，然后保持光罩的位置和线性紫外光照射方向不变，通过旋转基板，继续利用该光罩按照一定的照射角度对像素区域的另外三个子区域依次进行紫外光照射，依次得到该三个子区域的配向方向，即使得像素区域的四个子区域的配向方向互不相同，由于在配向过程中光罩始终保持稳定，能够有效减少精度损耗，提高曝光的精度，因此配向精度高，方法简单，成本低；本发明提供的一种液晶显示面板的制作方法，采用上述的垂直光配向方法分别对CF基板和TFT基板进行垂直光配向，配向精度高，且CF基板和TFT基板上相对应的子区域的配向方向互相垂直，使所得到的液晶显示面板具有广视角、高穿透、无色偏、高对比和高分辨的特性。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明垂直光配向方法的流程示意图；
图2为本发明垂直光配向方法的步骤3中所提供的光罩上一图案单元的结构示意图；
图3为本发明垂直光配向方法的步骤4的示意图；
图4为本发明垂直光配向方法的步骤4中经过垂直光配向后的像素区域对液晶分子导向的示意图；
图5为本发明液晶显示面板的制作方法的步骤4的示意图；
图6为本发明液晶显示面板的制作方法的步骤6中所得到液晶显示面板中CF基板和TFT基板上各子区域的配向方向的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，本发明提供一种垂直光配向方法，包括以下步骤：
步骤1、提供一基板，所述基板上具有数个阵列排布的像素区域500；每一像素区域500为正方形，将所述像素区域500划分为四个大小相等的正方形的子区域；
具体的，所述步骤1中提供的基板为TFT基板、或CF基板。
步骤2、在所述基板上涂布一层光配向聚合物，形成光配向膜；
具体的，所述步骤2中，在所述基板上涂布的光配向聚合物为聚酰亚胺材料。
步骤3、提供光罩900，所述光罩900上具有数个阵列排布的图案单元910，所述图案单元910的形状大小与所述像素区域500的形状大小相同，如图2所示，每一图案单元910包括透光的透光区911和不透光的遮光区912，所述透光区911和遮光区912的形状大小分别和所述像素区域50上的一个子区域和另外三个子区域的形状大小相同；
步骤4、如图3所示，将所述基板放置于可旋转的承载台上，利用所述光罩900对所述基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩900的透光区911而对应照射在所述数个像素区域500的一子区域上，从而对应于所述数个像素区域500的该子区域在光配向膜上形成第一配向方向；保持所述光罩900的位置和线性紫外光照射方向在该步骤4中均始终不变，通过承载台对所述基板按照顺时针或逆时针方向依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩900上的透光区911而依次对应照射在所述数个像素区域500的另 外三个子区域上，从而对应于所述数个像素区域500的该三个子区域在光配向膜上依次形成第二、第三、第四配向方向，从而得到具有四种配向方向的配向膜。
具体的，所述步骤4中，按照线性紫外光与所述基板之间为80°～89.7°夹角θ的照射角度对所述光配向膜进行线性紫外光照射。
具体的，如图4所示，经过垂直光配向的像素区域500能够使液晶进行定向排列，由于在配向过程中，光配向膜上形成的配向方向为沿着照射于其上的线性紫外光的照射方向，即使得液晶分子按照与基板为θ夹角而立于基板上。
基于上述垂直光配向方法，本发明还提供一种液晶显示面板的制作方法，包括以下步骤：
步骤10、提供TFT基板和CF基板，所述TFT基板和CF基板上分别具有相互对应的数个阵列排布的像素区域500；每一像素区域500为正方形，将所述像素区域500划分为四个大小相等的正方形的子区域，分别为按顺时针或逆时针依次排列的第一、第二、第三、第四子区域501、502、503、504。
步骤20、在所述TFT基板和CF基板上分别涂布一层光配向聚合物，分别形成光配向膜。
步骤30、提供光罩900，所述光罩900上具有数个阵列排布的图案单元910，所述图案单元910的形状大小与所述像素区域500的形状大小相同，每一图案单元910包括透光的透光区911和不透光的遮光区912所组成，所述透光区911和遮光区912的形状大小分别和所述像素区域500上的一个子区域和另外三个子区域的形状大小相同。
步骤40、如图5所示，将所述CF基板放置于可旋转的承载台上，利用所述光罩900对所述CF基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩900的透光区911而对应照射在所述数个像素区域500的第一子区域501，从而对应于所述数个像素区域500的第一子区域501在光配向膜上形成第一配向方向；保持所述光罩900的位置和线性紫外光照射方向在该步骤40中不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜700继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩900上的透光区901而对应照射在所述数个像素区域500的第二、第三、第四子区域502、503、504上，从而分别对应于所述数个像素区域500的第二、第三、第四子区域502、503、504依次在所述光配向膜上形成第二、 第三、第四配向方向。
具体的，所述步骤40中，按照顺时针或逆时针方向对所述CF基板进行旋转。
步骤50、将所述TFT基板放置于所述承载台上，继续保持所述光罩900的位置和线性紫外光照射方向在该步骤50中不变，利用所述光罩900对所述TFT基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩900的透光区911而对应照射在所述数个像素区域500的第二子区域502或第四子区域504上，从而对应于所述数个像素区域500的该子区域在光配向膜上形成第五配向方向；通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对所述TFT基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩900上的透光区911而对应照射在所述数个像素区域500的另外三个子区域上，从而对应于所述数个像素区域500的该三个子区域在光配向膜上依次形成第六、第七、第八配向方向。
步骤60、将所述TFT基板和CF基板对组，得到液晶显示面板；此时，如图6所示，所述TFT基板的第一、第二、第三、第四子区域501、502、503、504和CF基板上的第一、第二、第三、第四子区域501、502、503、504为一一对应；所述TFT基板上的第一、第二、第三、第四子区域501、502、503、504的光配向方向，分别和所述CF基板上的第一、第二、第三、第四子区域501、502、503、504的光配向方向垂直。
具体的，所述步骤40和步骤50中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向聚合物层进行线性紫外光照射。
具体的，所述步骤50中，按照顺时针或逆时针方向对所述TFT基板进行旋转。
本发明的液晶显示面板的制作方法，由于不使用突起和狭缝也能将像素区域分割成具有多个配向方向的子区域，因此使所得到的液晶显示面板的开口率大大提高，有更高的穿透，并且避免了狭缝部分散射而导致的漏光，提升了液晶显示面板的对比度；另外，由于对像素区域进行了分区，使得液晶显示面板内对应一个像素区域上的液晶可以有4个倾倒方向，具有更广的视角和更少的色偏；并由于在垂直光配向过程中，光罩900的位置保持稳定，能够有效减少精度损耗，提高曝光和配向的精度。
综上所述，本发明提供的一种垂直光配向的方法，将像素区域设计为正方形，并将每一像素区域划分为四个大小相等的子区域，光罩上对应像素区域的图案单元由透光区和遮光区所组成，其中所述透光区的形状和大 小与像素区域的一子区域的形状和大小相同，首先利用该光罩按照一定的照射角度对像素区域中的一个子区域进行紫外光照射，得到该子区域的配向方向，然后保持光罩的位置和线性紫外光照射方向不变，通过旋转基板，继续利用该光罩按照一定的照射角度对像素区域的另外三个子区域依次进行紫外光照射，得到该三个子区域的配向方向，即使得像素区域的四个子区域的配向方向互不相同，由于在配向过程中光罩始终保持稳定，能够有效减少精度损耗，提高曝光的精度，因此配向精度高，方法简单，成本低；本发明提供的一种液晶显示面板的制作方法，采用上述的垂直光配向方法分别对CF基板和TFT基板进行垂直光配向，配向精度高，且CF基板和TFT基板上相对应的子区域的配向方向互相垂直，使所得到的液晶显示面板具有广视角、高穿透、无色偏、高对比和高分辨的特性。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (12)

  1. 一种垂直光配向方法，包括以下步骤：
    步骤1、提供一基板，所述基板上具有数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域；
    步骤2、在所述基板上涂布一层光配向聚合物，形成光配向膜；
    步骤3、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所述像素区域上的一个子区域和另外三个子区域的形状大小相同；
    步骤4、将所述基板放置于可旋转的承载台上，利用所述光罩对所述基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的一子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤4中均始终不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而依次对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第二、第三、第四配向方向，从而得到具有四种配向方向的配向膜，使每一像素区域具有四种配向方向的子区域。
  2. 如权利要求1所述的垂直光配向方法，其中，所述步骤4中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向膜进行线性紫外光照射。
  3. 如权利要求1所述的垂直光配向方法，其中，所述步骤1中提供的基板为TFT基板、或CF基板。
  4. 如权利要求1所述的垂直光配向方法，其中，所述步骤4中按照顺时针或逆时针方向对所述基板进行旋转。
  5. 如权利要求1所述的垂直光配向方法，其中，所述步骤2中，在所述基板上涂布的光配向聚合物为聚酰亚胺材料。
  6. 一种液晶显示面板的制作方法，包括以下步骤：
    步骤10、提供TFT基板和CF基板，所述TFT基板和CF基板上分别 具有相互对应的数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域，分别为按顺时针或逆时针依次排列的第一、第二、第三、第四子区域；
    步骤20、在所述TFT基板和CF基板上分别涂布一层光配向聚合物，分别形成光配向膜；
    步骤30、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所述像素区域上的一个子区域和另外三个子区域的形状大小相同；
    步骤40、将所述CF基板放置于可旋转的承载台上，利用所述光罩对所述CF基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的第一子区域，从而对应于所述数个像素区域的第一子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤40中不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而对应照射在所述数个像素区域的第二、第三、第四子区域上，从而分别对应于所述数个像素区域的第二、第三、第四子区域依次在所述光配向膜上形成第二、第三、第四配向方向；
    步骤50、将所述TFT基板放置于所述承载台上，继续保持所述光罩的位置和线性紫外光照射方向在该步骤50中不变，利用所述光罩对所述TFT基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的第二子区域或第四子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第五配向方向；通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对所述TFT基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第六、第七、第八配向方向；
    步骤60、将所述TFT基板和CF基板对组，得到液晶显示面板；此时，所述TFT基板上的第一、第二、第三、第四子区域和CF基板上的第一、第二、第三、第四子区域为一一对应；所述TFT基板上的第一、第二、第三、第四子区域的光配向方向，分别和所述CF基板上的第一、第二、第三、第四子区域的光配向方向垂直。
  7. 如权利要求6所述的液晶显示面板的制作方法，其中，所述步骤40和步骤50中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向聚合物层进行线性紫外光照射。
  8. 如权利要求6所述的液晶显示面板的制作方法，其中，所述步骤40中，按照顺时针或逆时针方向对所述CF基板进行旋转。
  9. 如权利要求6所述的液晶显示面板的制作方法，其中，所述步骤50中，按照顺时针或逆时针方向对所述TFT基板进行旋转。
  10. 一种垂直光配向方法，包括以下步骤：
    步骤1、提供一基板，所述基板上具有数个阵列排布的像素区域；每一像素区域为正方形，将所述像素区域划分为四个大小相等的正方形的子区域；
    步骤2、在所述基板上涂布一层光配向聚合物，形成光配向膜；
    步骤3、提供光罩，所述光罩上具有数个阵列排布的图案单元，所述图案单元的形状大小与所述像素区域的形状大小相同，每一图案单元包括透光的透光区和不透光的遮光区，所述透光区和遮光区的形状大小分别和所述像素区域上的一个子区域和另外三个子区域的形状大小相同；
    步骤4、将所述基板放置于可旋转的承载台上，利用所述光罩对所述基板上的光配向膜按照一定的照射角度进行线性紫外光照射，此时，线性紫外光倾斜地穿过所述光罩的透光区而对应照射在所述数个像素区域的一子区域上，从而对应于所述数个像素区域的该子区域在光配向膜上形成第一配向方向；保持所述光罩的位置和线性紫外光照射方向在该步骤4中均始终不变，通过承载台对所述基板依次进行三次90°旋转，每进行一次旋转后对基板上的光配向膜继续进行线性紫外光照射，则线性紫外光依次倾斜地穿过所述光罩上的透光区而依次对应照射在所述数个像素区域的另外三个子区域上，从而对应于所述数个像素区域的该三个子区域在光配向膜上依次形成第二、第三、第四配向方向，从而得到具有四种配向方向的配向膜，使每一像素区域具有四种配向方向的子区域；
    其中，所述步骤4中，按照线性紫外光与所述基板之间为80°～89.7°夹角的照射角度对所述光配向膜进行线性紫外光照射；
    其中，所述步骤1中提供的基板为TFT基板、或CF基板。
  11. 如权利要求10所述的垂直光配向方法，其中，所述步骤4中按照顺时针或逆时针方向对所述基板进行旋转。
  12. 如权利要求10所述的垂直光配向方法，其中，所述步骤2中，在所述基板上涂布的光配向聚合物为聚酰亚胺材料。
PCT/CN2016/074621 2016-02-15 2016-02-26 垂直光配向方法及液晶显示面板的制作方法 Ceased WO2017139999A1 (zh)

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106773216A (zh) * 2017-01-13 2017-05-31 深圳市华星光电技术有限公司 一种液晶显示器及其制备方法
CN107255891B (zh) * 2017-08-08 2023-02-03 惠科股份有限公司 一种显示装置的制作方法
CN108873597A (zh) * 2018-06-26 2018-11-23 南京中电熊猫液晶显示科技有限公司 一种掩膜版及配向曝光方法
CN110658653B (zh) * 2018-06-29 2021-09-03 上海微电子装备（集团）股份有限公司 光配向装置及方法
KR102701040B1 (ko) * 2018-09-10 2024-08-29 엘지디스플레이 주식회사 표시장치
CN109358455A (zh) * 2018-12-24 2019-02-19 信利（惠州）智能显示有限公司 一种光配向处理方法、光配向掩模板及光配向掩模板组
CN109459891B (zh) * 2018-12-29 2022-05-03 成都中电熊猫显示科技有限公司 显示面板的光配向方法及显示面板和显示装置
CN110174783A (zh) * 2019-05-28 2019-08-27 深圳市道尔顿电子材料有限公司 光取向va液晶显示器的制作方法
CN110568645B (zh) * 2019-08-07 2021-07-06 Tcl华星光电技术有限公司 显示面板及显示装置
CN110596960A (zh) * 2019-09-10 2019-12-20 东莞通华液晶有限公司 一种液晶显示屏的非接触式配向方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831706A (en) * 1996-05-14 1998-11-03 Samsung Electronics Co., Ltd. Liquid crystal displays with widened viewing angle and methods of fabrication thereof
US6864931B1 (en) * 1999-02-17 2005-03-08 Kent State University Electrically controllable liquid crystal microstructures
WO2007125758A1 (ja) * 2006-04-27 2007-11-08 Sharp Kabushiki Kaisha 液晶表示装置の製造方法及び露光装置
CN104965388A (zh) * 2015-07-06 2015-10-07 深圳市华星光电技术有限公司 用于光配向的光罩及光配向方法
CN105259710A (zh) * 2015-11-12 2016-01-20 深圳市华星光电技术有限公司 光配向光罩

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000098393A (ja) * 1998-09-21 2000-04-07 Sharp Corp 液晶表示装置
KR100519366B1 (ko) * 1999-04-03 2005-10-07 엘지.필립스 엘시디 주식회사 멀티도메인 액정표시소자
TWI328708B (en) * 2004-03-19 2010-08-11 Chimei Innolux Corp An ips liquid crystal display apparatus
US7995177B2 (en) * 2005-06-09 2011-08-09 Sharp Kabushiki Kaisha Liquid crystal display device
WO2008108032A1 (ja) * 2007-03-05 2008-09-12 Sharp Kabushiki Kaisha 液晶表示装置及びその製造方法
US7684001B2 (en) * 2007-06-01 2010-03-23 Au Optronics Corporation Liquid crystal display panel having photo-alignment film and patterned pixel electrodes with micro slits disposed therein, electronic apparatus, and manufacturing method thereof
JP5521305B2 (ja) * 2008-10-08 2014-06-11 セイコーエプソン株式会社 液晶装置の製造方法および液晶装置
JP5198577B2 (ja) * 2008-10-21 2013-05-15 シャープ株式会社 配向膜、配向膜材料および配向膜を有する液晶表示装置ならびにその形成方法
KR101612480B1 (ko) * 2008-12-22 2016-04-27 삼성디스플레이 주식회사 배향기판, 이를 포함하는 액정표시패널 및 배향기판의 제조방법
JP2012018256A (ja) * 2010-07-07 2012-01-26 Hitachi High-Technologies Corp 液晶用配向膜露光方法及びその装置
WO2013022075A1 (ja) * 2011-08-11 2013-02-14 シャープ株式会社 液晶表示装置
JP6057261B2 (ja) * 2012-10-22 2017-01-11 Ｎｌｔテクノロジー株式会社 液晶表示装置及びその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831706A (en) * 1996-05-14 1998-11-03 Samsung Electronics Co., Ltd. Liquid crystal displays with widened viewing angle and methods of fabrication thereof
US6864931B1 (en) * 1999-02-17 2005-03-08 Kent State University Electrically controllable liquid crystal microstructures
WO2007125758A1 (ja) * 2006-04-27 2007-11-08 Sharp Kabushiki Kaisha 液晶表示装置の製造方法及び露光装置
CN104965388A (zh) * 2015-07-06 2015-10-07 深圳市华星光电技术有限公司 用于光配向的光罩及光配向方法
CN105259710A (zh) * 2015-11-12 2016-01-20 深圳市华星光电技术有限公司 光配向光罩

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