CN109143690B - Liquid crystal display panel and manufacturing method thereof - Google Patents
Liquid crystal display panel and manufacturing method thereof Download PDFInfo
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- CN109143690B CN109143690B CN201810950705.8A CN201810950705A CN109143690B CN 109143690 B CN109143690 B CN 109143690B CN 201810950705 A CN201810950705 A CN 201810950705A CN 109143690 B CN109143690 B CN 109143690B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 313
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 174
- 239000000463 material Substances 0.000 claims abstract description 133
- 238000000034 method Methods 0.000 claims description 15
- 230000035515 penetration Effects 0.000 abstract description 9
- 230000000007 visual effect Effects 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 99
- 239000011159 matrix material Substances 0.000 description 18
- 238000002161 passivation Methods 0.000 description 12
- 125000006850 spacer group Chemical group 0.000 description 11
- 238000000059 patterning Methods 0.000 description 8
- 210000002858 crystal cell Anatomy 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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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
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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
- G02F1/133757—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 with different alignment orientations
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Spectroscopy & Molecular Physics (AREA)
Abstract
The invention provides a liquid crystal display panel and a manufacturing method thereof. The liquid crystal display panel includes: the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer and a retaining wall which are arranged between the first substrate and the second substrate; the liquid crystal layer is divided into a plurality of first liquid crystal areas and a plurality of second liquid crystal areas by the retaining wall, the first liquid crystal areas are provided with first liquid crystal materials, and the second liquid crystal areas are provided with second liquid crystal materials; the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage, and the first liquid crystal area and the second liquid crystal area which are provided with different liquid crystal materials are arranged in the liquid crystal layer, so that liquid crystals in the first liquid crystal area and the second liquid crystal area have different inversion angles under the same driving voltage, and the visual angle of the liquid crystal display panel can be expanded on the premise of not reducing the penetration rate.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display panel and a manufacturing method thereof.
Background
Liquid Crystal Displays (LCDs) have many advantages such as thin body, power saving, no radiation, and are widely used, for example: liquid crystal televisions, mobile phones, Personal Digital Assistants (PDAs), digital cameras, computer screens, notebook computer screens, or the like, are dominant in the field of flat panel displays.
An active Thin Film Transistor-liquid crystal display (TFT-LCD) is the most common liquid crystal display in the mainstream market at present, and can be roughly divided into the following according to the driving manner of the liquid crystal: twisted Nematic (TN) or Super Twisted Nematic (STN) types, In-Plane Switching (IPS) types, and Vertical Alignment (VA) types. Among them, the VA mode lcd has a very high contrast ratio compared to other types of lcds, and has a very wide application in large-size displays such as tv. Generally, a liquid crystal display device includes a housing, a liquid crystal panel disposed in the housing, and a Backlight module (Backlight module) disposed in the housing. The Liquid Crystal display panel is mainly composed of a Thin Film Transistor Array Substrate (TFT Array Substrate), a Color Filter Substrate (CF Substrate) and a Liquid Crystal Layer (Liquid Crystal Layer) disposed between the two substrates, and the Liquid Crystal display panel has an operation principle that a driving voltage is applied to a pixel electrode of the TFT Substrate and a common electrode of the CF Substrate to control rotation of Liquid Crystal molecules of the Liquid Crystal Layer, so that light of the backlight module is refracted to generate a picture.
The most common of the existing VA-type lcd panels is a Polymer Stabilized Vertical Alignment (PSVA) type lcd panel, which has the advantages of high contrast and fast response speed. However, the PSVA type liquid crystal display panel has a narrow viewing angle, and in order to expand the viewing angle of the PSVA type liquid crystal display panel, a multi-domain (domain) structure is proposed, in which one sub-pixel is divided into a plurality of regions, and liquid crystals in each region are tilted in different directions after voltage is applied, so that the viewing effects in the respective directions tend to be uniform on average. The 8-domain structure is a multi-domain structure which is most commonly used at present, and is characterized in that a sub-pixel is divided into a main area (main) and a sub-area (sub), a main area pixel electrode and a sub-area pixel electrode are respectively arranged in the main area and the sub-area, the main area pixel electrode and the sub-area pixel electrode are both meter-shaped pattern electrodes, the meter-shaped pattern electrodes are that a traditional plane electrode is divided into four areas, electrode patterns which are spaced by strip-shaped electrode branches and slits and extend towards four different directions are respectively formed in the four areas, the four areas can be respectively formed in the main area and the sub-area by adopting the meter-shaped pattern electrodes, and then the purpose of expanding the visual angle can be achieved by enabling liquid crystal molecules of 4 domains of the main area and 4 domains of the sub-area to turn to different angles.
Furthermore, the liquid crystal display panel with the multi-domain structure also adopts a charge sharing technology, the main area and the secondary area of one sub-pixel are connected through a capacitor or a TFT, when a data signal is input to the sub-pixel, the same data signal can enable the main area and the secondary area to have different driving voltages, and liquid crystals in the main area and the secondary area have different lodging angles, so that the visual angle is expanded, the color deviation of a large visual angle is reduced, but the driving voltage of the secondary area is reduced by about 20% -30% through the mode, and therefore the great penetration loss is generated.
Disclosure of Invention
The invention aims to provide a liquid crystal display panel, which can expand the visual angle of the liquid crystal display panel on the premise of not reducing the penetration rate.
The present invention also provides a method for manufacturing a liquid crystal display panel, which can extend the viewing angle of the liquid crystal display panel without reducing the transmittance.
To achieve the above object, the present invention provides a liquid crystal display panel including: the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer and a retaining wall which are arranged between the first substrate and the second substrate;
the liquid crystal layer is divided into a plurality of first liquid crystal areas and a plurality of second liquid crystal areas by the retaining wall, the first liquid crystal areas are provided with first liquid crystal materials, and the second liquid crystal areas are provided with second liquid crystal materials;
the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage.
The dielectric anisotropy of the first liquid crystal material is larger than that of the second liquid crystal material, and the birefringence of the first liquid crystal material is smaller than that of the second liquid crystal material.
The value ranges of the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material are as follows: -2.5 to-5; the product of the birefringence of the first liquid crystal material and the thickness of the liquid crystal box is as follows: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360 nm.
The first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
The liquid crystal display panel is a flexible liquid crystal display panel.
The invention also provides a manufacturing method of the liquid crystal display panel, which comprises the following steps:
step S1, providing a first substrate and a second substrate, wherein a retaining wall is formed on the first substrate, and the retaining wall divides the first substrate into a plurality of first liquid crystal regions and a plurality of second liquid crystal regions which are alternately arranged;
step S2 of dropping a first liquid crystal material and a second liquid crystal material in the plurality of first liquid crystal regions and the plurality of second liquid crystal regions, respectively, to form a liquid crystal layer; the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage;
and step S3, forming a box by the first substrate and the second substrate pair to form the liquid crystal display panel.
The dielectric anisotropy of the first liquid crystal material is larger than that of the second liquid crystal material, and the birefringence of the first liquid crystal material is smaller than that of the second liquid crystal material.
The value ranges of the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material are as follows: -2.5 to-5; the product of the birefringence of the first liquid crystal material and the thickness of the liquid crystal box is as follows: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360 nm.
The first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
The liquid crystal display panel is a flexible liquid crystal display panel.
The invention has the beneficial effects that: the invention provides a liquid crystal display panel, comprising: the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer and a retaining wall which are arranged between the first substrate and the second substrate; the liquid crystal layer is divided into a plurality of first liquid crystal areas and a plurality of second liquid crystal areas by the retaining wall, the first liquid crystal areas are provided with first liquid crystal materials, and the second liquid crystal areas are provided with second liquid crystal materials; the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage, and the first liquid crystal area and the second liquid crystal area which are provided with different liquid crystal materials are arranged in the liquid crystal layer, so that liquid crystals in the first liquid crystal area and the second liquid crystal area have different inversion angles under the same driving voltage, and the visual angle of the liquid crystal display panel can be expanded on the premise of not reducing the penetration rate. The invention also provides a manufacturing method of the liquid crystal display panel, which can expand the visual angle of the liquid crystal display panel on the premise of not reducing the penetration rate.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic view of a liquid crystal display panel according to the present invention;
FIG. 2 is a schematic diagram of a liquid crystal display panel according to a first embodiment of the present invention;
FIG. 3 is a diagram of a liquid crystal display panel according to a second embodiment of the present invention;
FIG. 4 is a diagram of a liquid crystal display panel according to a third embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for fabricating a liquid crystal display panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, the present invention provides a liquid crystal display panel, including: a first substrate 10, a second substrate 20 disposed opposite to the first substrate 10, and a liquid crystal layer 30 and a retaining wall 40 disposed between the first substrate 10 and the second substrate 20;
the liquid crystal layer 30 is divided into a plurality of first liquid crystal regions 31 and a plurality of second liquid crystal regions 32 which are alternately arranged by the retaining walls 40, a first liquid crystal material is arranged in the first liquid crystal regions 31, and a second liquid crystal material is arranged in the second liquid crystal regions 32;
the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage.
Specifically, in some embodiments of the present invention, the liquid crystal display panel may be a flexible liquid crystal display panel or a non-flexible liquid crystal display panel, and the first substrate 10 and the first substrate 20 may be flexible substrates, such as transparent plastic substrates, and may also be glass or other substrates. Optionally, one of the first substrate 10 or the second substrate 20 may be an Array substrate including a TFT structure and a pixel electrode layer, and the other of the first substrate 10 and the second substrate 20 may be a Color Filter substrate 20 including a Color Filter layer, a black matrix, and a common electrode layer, which is not limited to the present invention.
In specific implementation, as shown in fig. 2, in some embodiments of the present invention, the first substrate 10 is an array substrate, the second substrate 20 is a color film substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a pixel electrode layer 14 disposed on the passivation layer 13, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a color filter layer 22 and a black matrix 23 disposed on the second substrate 21, a common electrode 24 disposed on the color filter layer 22 and the black matrix 23, and a second alignment layer 25 disposed on the common electrode 24, wherein a supporting spacer 26 is further disposed between the first substrate 10 and the second substrate 20; in the embodiment shown in fig. 2, the retaining wall 40 is formed by an independent patterning process using an independent retaining wall material, and the retaining wall 40 may be formed on the first substrate 10 first and then contacted with the second substrate 20 by a pair after being formed, or may be formed on the second substrate 20 first and then contacted with the first substrate 10 by a pair after being formed.
In specific implementation, as shown in fig. 3, in some embodiments of the present invention, the first substrate 10 is an array substrate, the second substrate 20 is a color film substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a pixel electrode layer 14 disposed on the passivation layer 13, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a color filter layer 22 and a black matrix 23 provided on the second substrate 21, a common electrode 24 provided on the color filter layer 22 and the black matrix 23, and a second alignment layer 25 provided on the common electrode 24; in the embodiment shown in fig. 3, the retaining wall 40 and the supporting spacer 26 are made of the same material and formed simultaneously by the same patterning process, and the retaining wall 40 and the supporting spacer 26 may be formed on the first substrate 10 first and then contact the second substrate 20 through a pair group, or formed on the second substrate 20 first and then contact the first substrate 10 through a pair group.
In specific implementation, as shown in fig. 3, in some embodiments of the present invention, a COA technology may also be used, in these embodiments, the first substrate 10 is an array substrate, the second substrate 20 is an opposite substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a color filter layer 22 disposed on the passivation layer 13, a pixel electrode layer 14 disposed on the color filter layer 22, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a black matrix 23 disposed on the second substrate 21, a flat protective layer 27 disposed on the black matrix 23 and the second substrate 21, a common electrode 24 disposed on the flat protective layer 27, and a second alignment layer 25 disposed on the common electrode 24; a supporting spacer 26 is further disposed between the first substrate 10 and the second substrate 20. In the embodiment shown in fig. 4, the retaining wall 40 and the supporting spacer 26 are made of the same material and formed simultaneously by the same patterning process, and the retaining wall 40 and the supporting spacer 26 may be formed on the first substrate 10 first and then contacted with the second substrate 20 by a pair group after being formed, or may be formed on the second substrate 20 first and then contacted with the first substrate 10 by a pair group after being formed; of course, in this embodiment, the retaining wall 40 may also be formed by an independent patterning process using an independent retaining wall material, the retaining wall 40 may be formed on the first substrate 10 first and then contacted with the second substrate 20 by a pair after being formed, or may be formed on the second substrate 20 first and then contacted with the first substrate 10 by a pair after being formed, which may be selected according to actual requirements.
Specifically, in other embodiments of the present invention, the black matrix 23 may also be located on the array substrate. Specifically, the color filter layer 22 generally includes a plurality of color resist blocks arranged in an array, the black matrix 23 shields the area between adjacent color resist blocks to prevent color mixing, and preferably, the first pixel electrode and the second pixel electrode are patterned electrodes in a shape of a Chinese character 'mi'.
It should be emphasized that, in the present invention, the dielectric anisotropy of the first liquid crystal material is greater than the dielectric anisotropy of the second liquid crystal material, the birefringence of the first liquid crystal material is less than the birefringence of the second liquid crystal material, and by setting the dielectric anisotropy of the first liquid crystal material to be greater than the dielectric anisotropy of the second liquid crystal material, the liquid crystals in the first liquid crystal region 31 and the second liquid crystal region 32 can have different inversion angles under the same driving voltage, so as to form multi-domains, and realize wide viewing angle display, by setting the birefringence of the first liquid crystal material to be less than the birefringence of the second liquid crystal material, the product of the birefringence of the first liquid crystal material and the liquid crystal cell thickness is less than the product of the birefringence of the second liquid crystal material, and the transmittance loss caused by insufficient inversion of the liquid crystals due to the decrease of the dielectric anisotropy in the second liquid crystal region is compensated, display with wide viewing angle and high transmittance is realized.
Specifically, the value ranges of the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material are as follows: -2.5 to-5, preferably, the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material both have the following value range: -2.9 to-3.5.
Specifically, the product of the birefringence and the thickness of the liquid crystal cell of the first liquid crystal material is: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360nm, preferably, the product of the birefringence index of the first liquid crystal material and the thickness of the liquid crystal box is: 320 nm-350 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 320 nm-350 nm to keep the liquid crystal display panel to have higher penetration rate.
Preferably, the first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
Specifically, referring to fig. 5, the present invention further provides a method for manufacturing a liquid crystal display panel, including the following steps:
step S1, providing a first substrate 10 and a second substrate 20, wherein a retaining wall 40 is formed on the first substrate 10, and the retaining wall 40 divides the first substrate 10 into a plurality of first liquid crystal regions 31 and a plurality of second liquid crystal regions 32 which are alternately arranged.
Specifically, in some embodiments of the present invention, the liquid crystal display panel may be a flexible liquid crystal display panel or a non-flexible liquid crystal display panel, and the first substrate 10 and the first substrate 20 may be flexible substrates, such as transparent plastic substrates, and may also be glass or other substrates. Optionally, one of the first substrate 10 or the second substrate 20 may be an Array substrate including a TFT structure and a pixel electrode layer, and the other of the first substrate 10 and the second substrate 20 may be a Color Filter substrate 20 including a Color Filter layer, a black matrix, and a common electrode layer, which is not limited to the present invention.
Optionally, in the step S1, the first substrate 10 may be an array substrate or a color filter substrate, that is, the retaining wall 40 may be formed on the array substrate or the color filter substrate first.
In specific implementation, as shown in fig. 2, in some embodiments of the present invention, the first substrate 10 is an array substrate, the second substrate 20 is a color film substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a pixel electrode layer 14 disposed on the passivation layer 13, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a color filter layer 22 and a black matrix 23 disposed on the second substrate 21, a common electrode 24 disposed on the color filter layer 22 and the black matrix 23, and a second alignment layer 25 disposed on the common electrode 24, wherein a supporting spacer 26 is further disposed between the first substrate 10 and the second substrate 20; in the embodiment shown in fig. 2, the retaining wall 40 is formed by a separate patterning process using a separate retaining wall material.
In specific implementation, as shown in fig. 3, in some embodiments of the present invention, the first substrate 10 is an array substrate, the second substrate 20 is a color film substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a pixel electrode layer 14 disposed on the passivation layer 13, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a color filter layer 22 and a black matrix 23 provided on the second substrate 21, a common electrode 24 provided on the color filter layer 22 and the black matrix 23, and a second alignment layer 25 provided on the common electrode 24; a supporting spacer 26 is further disposed between the first substrate 10 and the second substrate 20, in the embodiment shown in fig. 3, the retaining wall 40 and the supporting spacer 26 are made of the same material and are formed simultaneously by the same patterning process;
in specific implementation, as shown in fig. 3, in some embodiments of the present invention, a COA technology may also be used, in these embodiments, the first substrate 10 is an array substrate, the second substrate 20 is an opposite substrate, and the first substrate 10 includes a first substrate 11, a TFT layer 12 disposed on the first substrate 11, a passivation layer 13 disposed on the TFT layer 12, a color filter layer 22 disposed on the passivation layer 13, a pixel electrode layer 14 disposed on the color filter layer 22, a planarization layer 15 disposed on the pixel electrode layer 14, and a first alignment layer 16 disposed on the planarization layer 15; the pixel electrode layer 14 includes a plurality of first pixel electrodes corresponding to the plurality of first liquid crystal regions 312 and a plurality of second pixel electrodes corresponding to the plurality of second liquid crystal regions 312, and the second substrate 20 includes: a second substrate 21, a black matrix 23 disposed on the second substrate 21, a flat protective layer 27 disposed on the black matrix 23 and the second substrate 21, a common electrode 24 disposed on the flat protective layer 27, and a second alignment layer 25 disposed on the common electrode 24; a supporting spacer 26 is further disposed between the first substrate 10 and the second substrate 20. In the embodiment shown in fig. 4, the retaining wall 40 and the supporting spacer 26 are made of the same material and formed simultaneously by the same patterning process, but in this embodiment, the retaining wall 40 may also be made of a separate retaining wall material and formed by a separate patterning process;
specifically, in other embodiments of the present invention, the black matrix 23 may also be located on the array substrate. Specifically, the color filter layer 22 generally includes a plurality of color resist blocks arranged in an array, and the black matrix 23 blocks an area between adjacent color resist blocks to prevent color mixing. Preferably, the first pixel electrode and the second pixel electrode are patterned electrodes in a shape of a Chinese character 'mi'.
Step S2 of dropping a first liquid crystal material and a second liquid crystal material in the plurality of first liquid crystal regions 31 and the plurality of second liquid crystal regions 32, respectively, to form a liquid crystal layer 30; the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage;
specifically, in the present invention, the dielectric anisotropy of the first liquid crystal material is greater than the dielectric anisotropy of the second liquid crystal material, the birefringence of the first liquid crystal material is less than the birefringence of the second liquid crystal material, and by setting the dielectric anisotropy of the first liquid crystal material to be greater than the dielectric anisotropy of the second liquid crystal material, the liquid crystals in the first liquid crystal region 31 and the second liquid crystal region 32 can have different inversion angles under the same driving voltage, so as to form multiple domains, and realize wide viewing angle display, by setting the birefringence of the first liquid crystal material to be less than the birefringence of the second liquid crystal material, the product of the birefringence of the first liquid crystal material and the thickness of the liquid crystal cell is less than the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal cell, so as to compensate for the transmittance loss caused by insufficient liquid crystal inversion due to the decrease of the dielectric anisotropy in the second liquid crystal region, display with wide viewing angle and high transmittance is realized.
Specifically, the value ranges of the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material are as follows: -2.5 to-5, preferably, the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material both have the following value range: -2.9 to-3.5.
Specifically, the product of the birefringence and the thickness of the liquid crystal cell of the first liquid crystal material is: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360nm, preferably, the product of the birefringence index of the first liquid crystal material and the thickness of the liquid crystal box is: 320 nm-350 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 320 nm-350 nm to keep the liquid crystal display panel to have higher penetration rate.
Preferably, the first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
Step S3, forming a cell by the pair of the first substrate 10 and the second substrate 20, and forming a liquid crystal display panel.
Specifically, the step S3 further includes a process of aligning the liquid crystal layer after the pair of the first substrate 10 and the second substrate 20 forms a cell, and preferably, the alignment is a PSVA alignment.
In summary, the present invention provides a liquid crystal display panel, including: the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer and a retaining wall which are arranged between the first substrate and the second substrate; the liquid crystal layer is divided into a plurality of first liquid crystal areas and a plurality of second liquid crystal areas by the retaining wall, the first liquid crystal areas are provided with first liquid crystal materials, and the second liquid crystal areas are provided with second liquid crystal materials; the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage, and the first liquid crystal area and the second liquid crystal area which are provided with different liquid crystal materials are arranged in the liquid crystal layer, so that liquid crystals in the first liquid crystal area and the second liquid crystal area have different inversion angles under the same driving voltage, and the visual angle of the liquid crystal display panel can be expanded on the premise of not reducing the penetration rate. The invention also provides a manufacturing method of the liquid crystal display panel, which can expand the visual angle of the liquid crystal display panel on the premise of not reducing the penetration rate.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. A liquid crystal display panel, comprising: the liquid crystal display panel comprises a first substrate (10), a second substrate (20) arranged opposite to the first substrate (10), and a liquid crystal layer (30) and a retaining wall (40) which are arranged between the first substrate (10) and the second substrate (20);
the liquid crystal layer (30) is divided into a plurality of first liquid crystal areas (31) and a plurality of second liquid crystal areas (32) which are alternately arranged by the retaining walls (40), a first liquid crystal material is arranged in the first liquid crystal areas (31), and a second liquid crystal material is arranged in the second liquid crystal areas (32);
the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage;
the first liquid crystal material has a birefringence that is less than a birefringence of the second liquid crystal material.
2. The liquid crystal display panel of claim 1, wherein the first liquid crystal material has a dielectric anisotropy that is greater than a dielectric anisotropy of the second liquid crystal material.
3. The liquid crystal display panel according to claim 2, wherein the dielectric anisotropy of the first liquid crystal material and the second liquid crystal material both have a value in a range of: -2.5 to-5; the product of the birefringence of the first liquid crystal material and the thickness of the liquid crystal box is as follows: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360 nm.
4. The liquid crystal display panel of claim 1, wherein the first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
5. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is a flexible liquid crystal display panel.
6. The manufacturing method of the liquid crystal display panel is characterized by comprising the following steps:
step S1, providing a first substrate (10) and a second substrate (20), wherein a retaining wall (40) is formed on the first substrate (10), and the first substrate (10) is divided into a plurality of first liquid crystal regions (31) and a plurality of second liquid crystal regions (32) which are alternately arranged by the retaining wall (40);
a step S2 of injecting a first liquid crystal material and a second liquid crystal material into the plurality of first liquid crystal regions (31) and the plurality of second liquid crystal regions (32), respectively, to form a liquid crystal layer (30); the first liquid crystal material and the second liquid crystal material have different inversion angles under the same driving voltage;
step S3, forming a box by the first substrate (10) and the second substrate (20) in a pair mode to form a liquid crystal display panel;
the first liquid crystal material has a birefringence that is less than a birefringence of the second liquid crystal material.
7. The method according to claim 6, wherein the first liquid crystal material has a dielectric anisotropy larger than that of the second liquid crystal material.
8. The method according to claim 7, wherein the first liquid crystal material and the second liquid crystal material have dielectric anisotropy in a range of: -2.5 to-5; the product of the birefringence of the first liquid crystal material and the thickness of the liquid crystal box is as follows: 290 nm-360 nm; the product of the birefringence of the second liquid crystal material and the thickness of the liquid crystal box is as follows: 290nm to 360 nm.
9. The method according to claim 6, wherein the first liquid crystal material and the second liquid crystal material are both negative liquid crystal materials.
10. The method of manufacturing a liquid crystal display panel according to claim 6, wherein the liquid crystal display panel is a flexible liquid crystal display panel.
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| CN110161737A (en) | 2019-05-13 | 2019-08-23 | 深圳市华星光电技术有限公司 | Display and its manufacturing method |
| CN110568645B (en) * | 2019-08-07 | 2021-07-06 | Tcl华星光电技术有限公司 | Display panel and display device |
| CN111273475B (en) | 2020-03-27 | 2021-05-28 | Tcl华星光电技术有限公司 | Display device, display panel and manufacturing method thereof |
| CN114326220B (en) * | 2021-12-30 | 2023-01-10 | 惠科股份有限公司 | Flexible display panel and electronic equipment |
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| CN101644843B (en) * | 2009-09-15 | 2012-04-11 | 深圳秋田微电子有限公司 | Fast response twisted nematic liquid crystal display |
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