CN114924442B - Alignment method of display panel and display panel - Google Patents
Alignment method of display panel and display panel Download PDFInfo
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- CN114924442B CN114924442B CN202210537710.2A CN202210537710A CN114924442B CN 114924442 B CN114924442 B CN 114924442B CN 202210537710 A CN202210537710 A CN 202210537710A CN 114924442 B CN114924442 B CN 114924442B
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 115
- 239000000203 mixture Substances 0.000 claims abstract description 43
- 239000000178 monomer Substances 0.000 claims abstract description 33
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims description 50
- 230000005611 electricity Effects 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 10
- 238000004873 anchoring Methods 0.000 abstract description 17
- 229920000642 polymer Polymers 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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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
- G02F1/13378—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
- G02F1/1337—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
- G02F1/133723—Polyimide, polyamide-imide
-
- 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
- G02F1/133738—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homogeneous alignment
Abstract
The application provides an alignment method of a display panel and the display panel, wherein the alignment method comprises the steps of carrying out first light irradiation on a display panel to be aligned before loading a first preset voltage on a liquid crystal composition to enable part of liquid crystal molecules to form a preset inclination angle, carrying out polymerization reaction on part of photoreactive monomers under the first light irradiation to obtain a polymer, anchoring the liquid crystal molecules by the polymer, compensating the difference of anchoring force on the liquid crystal molecules caused by the difference of thickness of a first alignment layer and a second alignment layer close to respective edges, so as to improve the difference of pretilt angles of a plurality of liquid crystal molecules generated under the action of the first preset voltage due to the difference of the applied anchoring force, and further improve the uneven brightness problem caused by the existence of the pretilt angle difference of the liquid crystal molecules in a display area due to narrower frames.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to an alignment method of a display panel and a display panel.
Background
With the rapid development of the liquid crystal display device, the liquid crystal display device is rapidly developed in industries such as intelligent mobile terminals, television screens and the like, and more other industries also put forward demands on the liquid crystal display device, such as the increasingly vigorous electronic contest display industry and the like. As the market demand for liquid crystal display devices increases, narrow frame liquid crystal display devices have grown.
However, the too narrow frame may cause a problem in that the display area of the liquid crystal display device may have uneven brightness.
Disclosure of Invention
The application aims to provide an alignment method of a display panel and the display panel, so as to solve the problem that uneven brightness display occurs in a display area of the display panel due to too narrow frame.
In order to achieve the above purpose, the technical scheme is as follows:
an alignment method of a display panel, the method comprising:
providing a display panel to be aligned, wherein the display panel to be aligned comprises a first substrate, a second substrate, a liquid crystal composition, a first alignment layer and a second alignment layer which are oppositely arranged, the first alignment layer is arranged on the surface of the first substrate, which is close to the second substrate, the second alignment layer is arranged on the surface of the second substrate, which is close to the first substrate, the liquid crystal composition is arranged between the first alignment layer and the second alignment layer, and the liquid crystal composition comprises a plurality of liquid crystal molecules and a plurality of photoreactive monomers;
performing first light irradiation on the display panel to be aligned, wherein part of the photoreactive monomer is subjected to polymerization reaction under the first light irradiation;
and loading a first preset voltage on the liquid crystal composition, simultaneously carrying out second light irradiation on the display panel to be aligned, deflecting a plurality of liquid crystal molecules under the action of the first preset voltage, deflecting the liquid crystal molecules close to the first alignment layer and the second alignment layer until the liquid crystal molecules have a preset pretilt angle, and carrying out polymerization reaction on at least part of the rest of the photoreactive monomers under the second light irradiation.
In some embodiments of the alignment method of a display panel, the first light irradiation and the second light irradiation adopt the same wavelength, and the duration of the first light irradiation is shorter than that of the second light irradiation.
In some embodiments of the alignment method of a display panel, before performing the first light irradiation on the display panel to be aligned, the method further includes:
and carrying out static electricity removal treatment on the display panel to be aligned.
In some embodiments of the alignment method of a display panel, the performing the static electricity removing treatment on the display panel to be aligned includes:
and loading a second preset voltage to the liquid crystal composition in the display panel to be aligned.
In some embodiments of the alignment method of a display panel, after loading a second preset voltage on the display panel to be aligned and before performing the first light irradiation on the display panel to be aligned, the method further includes:
loading a third preset voltage to the liquid crystal composition in the display panel to be aligned, wherein the third preset voltage is larger than the first preset voltage.
In some embodiments, the method for aligning a display panel comprises sequentially alternating at least two times loading a second preset voltage to the liquid crystal composition in the display panel to be aligned and loading a third preset voltage to the liquid crystal composition in the display panel to be aligned.
In some embodiments of the alignment method of a display panel, after performing the second light irradiation on the display panel to be aligned, the method further includes:
and carrying out third light irradiation on the display panel to be aligned after the second light irradiation treatment, and carrying out polymerization reaction on the rest of the photoreactive monomer under the action of the third light irradiation.
In some embodiments of the alignment method of a display panel, the display panel to be aligned further includes a filter layer, where the filter layer is disposed between the first substrate and the first alignment layer, and light adopted by the first light irradiation and the second light irradiation is incident from a side of the second substrate away from the first substrate.
In some embodiments, the first alignment layer and the second alignment layer have a thickness of 70 micrometers or more and 100 micrometers or less.
A display panel is manufactured by the alignment method of the display panel.
The beneficial effects are that: the application provides an alignment method of a display panel and the display panel, wherein the alignment method comprises the steps of carrying out first light irradiation on a display panel to be aligned before loading a first preset voltage on a liquid crystal composition to enable part of liquid crystal molecules to form a preset inclination angle, carrying out polymerization reaction on part of photoreactive monomers under the first light irradiation to obtain a polymer, anchoring the liquid crystal molecules by the polymer, compensating the difference of anchoring force on the liquid crystal molecules caused by the difference of thickness of a first alignment layer and a second alignment layer close to respective edges, so as to improve the difference of pretilt angles of a plurality of liquid crystal molecules generated under the action of the first preset voltage due to the difference of the applied anchoring force, and further improve the uneven brightness problem caused by the existence of the pretilt angle difference of the liquid crystal molecules in a display area due to narrower frames.
Drawings
FIG. 1 is a flow chart of an alignment method of a display panel according to an embodiment of the application;
fig. 2A-2C are schematic process diagrams illustrating an alignment method of a display panel according to an embodiment of the application;
FIG. 3 is a graph showing the voltage (V) -transmittance (T) curve of the panel under different conditions;
FIG. 4 is a flow chart of an alignment method of a display panel according to another embodiment of the application;
fig. 5 is a flowchart illustrating an alignment method of a display panel according to another embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
Fig. 1 is a flow chart of an alignment method of a display panel according to an embodiment of the application. The alignment method of the display panel comprises the following steps:
s101: the method comprises the steps of providing a display panel to be aligned, wherein the display panel to be aligned comprises a first substrate, a second substrate, a liquid crystal composition, a first alignment layer and a second alignment layer which are oppositely arranged, the first alignment layer is arranged on the surface of the first substrate, which is close to the second substrate, the second alignment layer is arranged on the surface of the second substrate, which is close to the first substrate, the liquid crystal composition is arranged between the first alignment layer and the second alignment layer, and the liquid crystal composition comprises a plurality of liquid crystal molecules and a plurality of photoreactive monomers.
Specifically, referring to fig. 2A, the display panel 100 to be aligned has a display area 100a and a frame area 100b, wherein the frame area 100b is located at the periphery of the display area 100 a. The display panel 100 includes a first substrate 110, a second substrate 120, a filter layer 119, a pixel electrode 112, a common electrode 122, a first alignment layer 114, a second alignment layer 124, a liquid crystal composition and a sealant 117.
The first alignment layer 114 and the second alignment layer 124 are located in the display area 100a and the frame area 100b. The first alignment layer 114 is disposed on a surface of the first substrate 110 adjacent to the second substrate 120, and the second alignment layer 124 is disposed on a surface of the second substrate 120 adjacent to the first substrate 110.
The first alignment layer 114 and the second alignment layer 124 are vertical alignment films, each including polyimide including a polyimide main chain and first branches 1141 connected to the polyimide main chain, the first branches 1141 extending in a thickness direction of the display panel 100 to be aligned.
The thickness of the first alignment layer 114 and the second alignment layer 124 is greater than or equal to 70 microns and less than or equal to 100 microns, such as 80 microns, 90 microns, or 100 microns.
It should be noted that, the first alignment layer 114 and the second alignment layer 124 are obtained by applying an alignment solution by an inkjet printing method, and then performing a polymerization reaction on the alignment solution at a high temperature and then performing a vertical alignment treatment. Because the alignment solution is subjected to the action of surface tension, the thickness of the first alignment layer 114 and the second alignment layer 124, which are formed by shaping the alignment solution, will be uneven, and the first branches 1141 are densely distributed at the positions with thicker thickness and the first branches 1141 are sparsely distributed at the positions with thinner thickness. The bezel area 100b of the display panel 100 to be aligned is narrower, and portions of the first alignment layer 114 and the second alignment layer 124 near the respective edge thicknesses are present in the display area 100a, resulting in uneven distribution of the first branches 1141 of the display area 100a near the bezel area 100b.
The frame glue 117 is located in the frame area 100b. The sealant 117 is disposed between the first substrate 110 and the second substrate 120, and connects the first substrate 110 and the second substrate 120.
The liquid crystal composition is disposed in a space surrounded by the sealant 117, the first substrate 110, and the second substrate 120, and is located between the first alignment layer 114 and the second alignment layer 124. The liquid crystal composition includes a plurality of liquid crystal molecules 118, a plurality of photoreactive monomers 116, and a photoinitiator. The liquid crystal molecules 118 are negative liquid crystal molecules, the photoreactive monomer 116 is an acrylate monomer, and the photoinitiator is an ultraviolet initiator.
When no electric field is applied to the plurality of liquid crystal molecules 118, the long axes of the plurality of liquid crystal molecules 118 are parallel to the thickness direction of the display panel 100 to be aligned, and at this time, the first branched chains 1141 unevenly distributed in the display area 100a near the frame area 100b also have a problem of uneven distribution of the alignment force provided to the liquid crystal molecules 118 along the thickness direction of the display panel 100 to be aligned.
The pixel electrodes 112 are disposed between the first substrate 110 and the first alignment layer 114, and the plurality of pixel electrodes 112 are disposed at intervals. The pixel electrode 112 is made of a transparent conductive material.
The common electrode 122 is disposed between the second substrate 120 and the second alignment layer 124. The common electrode 122 is an entire transparent conductive layer.
The filter layer 119 is disposed between the first substrate 110 and the first alignment layer 114, the pixel electrode 112 is disposed between the filter layer 119 and the first alignment layer 114, and a thin film transistor array layer is disposed between the filter layer 119 and the first substrate 110. The filter layer 119 includes red, blue, and green photoresists.
Note that the filter layer 119 may be disposed between the second substrate 120 and the common electrode 122.
S102: and carrying out first light irradiation on the display panel to be aligned, and carrying out polymerization reaction on part of the photoreactive monomers under the first light irradiation.
Specifically, referring to fig. 2B, the first ultraviolet light L1 is incident on the display panel 100 to be aligned from a side of the second substrate 120 away from the first substrate 110, the first ultraviolet light L1 passes through the second substrate 120 and irradiates the liquid crystal composition, the photoinitiator in the liquid crystal composition is activated by the first ultraviolet light L1, and the activated initiator initiates polymerization of a portion of the photoreactive monomer 116 to obtain a first polymer 1161, wherein the first polymer 1161 is formed on the surfaces of the first alignment layer 114 and the second alignment layer 124, and the first polymer 1161 includes a second branch 1162 extending along a first direction, which is parallel to a thickness direction of the display panel 100 to be aligned.
The wavelength of the first ultraviolet light L1 is greater than or equal to 300 nm and less than or equal to 330 nm, such as 315 nm and 320 nm. The illuminance of the first ultraviolet light L1 for the first light irradiation is more than or equal to 0.4mW/cm 2 And less than or equal to 0.6mW/cm 2 For example 0.45mW/cm 2 . And the first ultraviolet light L1 is irradiated for more than or equal to 25s and less than or equal to the first timeAt 35s, for example, the time is 32s.
It should be noted that the second branches 1162 provide the alignment force in the thickness direction of the display panel 100 to be aligned to the plurality of liquid crystal molecules 118, so that the overall alignment force of the liquid crystal molecules 118 in the thickness direction of the display panel 100 to be aligned increases, the order of the liquid crystal molecules 118 under the action of the external electric field increases, and the difference of the alignment forces of the first alignment layer 114 and the second alignment layer 124 on the liquid crystal molecules 118 in the display area 100a near the frame area 100b relatively decreases.
S103: and (3) loading the liquid crystal composition with a first preset voltage, and simultaneously, carrying out second light irradiation on the display panel to be aligned, wherein a plurality of liquid crystal molecules deflect under the action of the first preset voltage, the liquid crystal molecules close to the first alignment layer and the second alignment layer deflect to have a preset pretilt angle, and at least part of the rest photoreactive monomers undergo polymerization reaction under the second light irradiation to obtain the display panel.
Specifically, referring to fig. 2C, voltages are applied to the pixel electrode 112 and the common electrode 122, respectively, the difference between the voltages applied to the pixel electrode 112 and the common electrode 122 is a first preset voltage V1, the liquid crystal molecules 118 close to the first alignment layer 114 and the second alignment layer 124 are deflected to have a preset pretilt angle by the electric field force corresponding to the first preset voltage V1, the alignment force of the second branched chain 1162 and the first branched chain 1141, and the liquid crystal molecules 118 far from the first alignment layer 114 and the second alignment layer 124 are deflected to have a long axis perpendicular to the thickness direction of the display panel 100 to be aligned by the electric field force corresponding to the first preset voltage V1; meanwhile, a second ultraviolet light L2 is incident to the display panel 100 to be aligned from a side of the second substrate 120 away from the first substrate 110, the second ultraviolet light L2 irradiates the liquid crystal composition through the second substrate 120, etc., a photoinitiator in the liquid crystal composition is activated by the first ultraviolet light L1, and the activated initiator initiates polymerization of the remaining at least part of the photoreactive monomer 116 to obtain a second polymer 1163, the second polymer 1163 is formed on the surfaces of the first alignment layer 114 and the second alignment layer 124, and the second polymer 1163 includes a third branch 1164 extending in a second direction.
Wherein the included angle between the second direction and the first direction is greater than 0 degrees and less than 90 degrees or greater than 90 degrees and less than 180 degrees. The second direction is associated with a preset pretilt angle of the liquid crystal molecules 118 near the first alignment layer 114 and the second alignment layer 124.
The first preset voltage V1 is a saturation voltage, which is a critical voltage for deflecting the long axes of the plurality of liquid crystal molecules 118 from parallel to the thickness direction of the display panel 100 to be aligned to perpendicular to the thickness direction of the display panel 100 to be aligned. The first preset voltage V1 is greater than or equal to 12V and less than or equal to 15V, for example, the first preset voltage V1 is 13V or 14V.
The wavelength of the second ultraviolet light L2 is the same as the wavelength of the first ultraviolet light L1, and the illuminance of the first light irradiation is equal to the illuminance of the second light irradiation, so that the second light irradiation and the first light irradiation can be completed by the same ultraviolet lamp irradiation.
The angle between the tilt direction of the liquid crystal molecules 118 having the preset pretilt angle and the direction perpendicular to the thickness of the display panel 100 to be aligned is greater than or equal to 1 degree and less than or equal to 1.5 degrees, for example, 1.2 degrees, 1.3 degrees.
The duration of the first light irradiation is less than the duration of the second light irradiation, so that the amount of reaction of the photoreactive monomer 116 at the first light irradiation is less than the amount of reaction at the second light irradiation. The ratio of the duration of the second light irradiation to the duration of the first light irradiation is greater than or equal to 2 and less than or equal to 3. Specifically, the time period of the second light irradiation is greater than or equal to 60s and less than or equal to 80s.
It should be noted that, for the liquid crystal molecules 118 near the first alignment layer 114 and the second alignment layer 124, the alignment forces of the second branch 1162 and the first branch 1141 act on the liquid crystal molecules 118 in the display area 100a near the frame area 100b, the alignment forces of the liquid crystal molecules 118 are less affected by the uneven distribution of the alignment forces of the first branch 1141, and after the electric field force corresponding to the first preset voltage V1 acts on the plurality of liquid crystal molecules 118, the pretilt angles of the liquid crystal molecules 118 near the first alignment layer 114 and the second alignment layer 124 formed in the display area 100a near the frame area 100b and other positions of the display area 100a are less different, which is beneficial to improving the uneven display problem of the display panel caused by the pretilt angle difference.
In addition, in the conventional technology, when a voltage is applied to the liquid crystal mixture to form a preset pretilt angle, the first illumination causes the photoreactive monomer in the liquid crystal mixture to polymerize, and then the second illumination is performed on the liquid crystal mixture under the condition that the liquid crystal mixture is not powered, although the reaction amount of the photoreactive monomer is increased, and the anchoring force to liquid crystal molecules is further increased, when the liquid crystal molecules form the preset pretilt angle under the action of the saturated voltage, the difference of the alignment forces applied by the alignment film in the display area close to the frame area is not improved, so that the difference of the pretilt angles formed by the liquid crystal molecules cannot be improved.
In this embodiment, the alignment method of the display panel performs the first light irradiation on the display panel to be aligned before loading the first preset voltage on the liquid crystal composition to form a preset pretilt angle on a part of liquid crystal molecules, and the polymerization reaction of the part of photoreactive monomers occurs under the first light irradiation to obtain a polymer, which plays an anchoring role on the liquid crystal molecules, compensates the difference of the anchoring force on the liquid crystal molecules caused by the difference of the thickness of the first alignment layer and the thickness of the second alignment layer close to the respective edges, so as to improve the pretilt angle difference generated by the first preset voltage due to the difference of the anchoring force on the plurality of liquid crystal molecules, and further improve the uneven brightness problem caused by the existence of the pretilt angle difference of the liquid crystal molecules in the display area due to narrower frame.
Please refer to fig. 3, which is a schematic diagram illustrating a voltage (V) -transmittance (T) curve of the display panel under different conditions. Curve 1 is a VT curve corresponding to the display panel to be aligned before the processing in step S102, curve 2 is a VT curve corresponding to the display panel to be aligned after the processing in step S103 without the processing in step S102, and curve 3 is a VT curve corresponding to the display panel to be aligned after the processing in step S102 and step S103 in order.
Referring to fig. 3, when the transmittance T is a, the voltage V required by the curve 1 is greater than the voltage V required by the curve 3, and the driving voltage V required by the curve 3 is greater than the voltage V required by the curve 2, mainly because the photoreactive monomer 116 in the display panel to be aligned before the processing in the step S102 is unreacted, the anchoring force of the first branched chains 1141 of the first alignment layer 114 and the second alignment layer 124 to the liquid crystal molecules 118 is strong, and a larger voltage is required to drive the liquid crystal molecules 118 to deflect; in the display panel to be aligned processed in step S103 without the processing in step S102, a part of unreacted photoreactive monomer 116 covers the first branches 1141 of the first alignment layer 114 and the second alignment layer 124, and the branches of the polymer formed after polymerization of the photoreactive monomer 116 have anchoring force to the liquid crystal molecules 118, but the anchoring force applied to the whole liquid crystal molecules 118 is relatively weakened; in the display panel to be aligned processed in steps S102 and S103 in this order, the reaction amount of the photoreactive monomer 116 increases, the sum of the anchoring force provided by the branched chains of the polymer formed after polymerization of the photoreactive monomer 116 to the liquid crystal molecules 118 and the anchoring force provided by the first branched chains 1141 of the first alignment layer 114 and the second alignment layer 124 to the liquid crystal molecules increases, the control ability of the anchoring force to the liquid crystal molecules 118 increases, and the voltage required to drive the liquid crystal molecules 118 to deflect relatively increases.
Fig. 4 is a flow chart of an alignment method of a display panel according to another embodiment of the application. The alignment method of the display panel shown in fig. 4 is substantially similar to the alignment method of the display panel shown in fig. 1, except that before the first light irradiation is performed on the display panel 100 to be aligned, the method further includes:
s104: and carrying out static electricity removal treatment on the display panel to be aligned.
Specifically, the liquid crystal composition in the display panel to be aligned 100 is loaded with a second preset voltage, which is a difference of voltages loaded to the pixel electrode 112 and the common electrode 122, the second preset voltage being equal to 0V or close to 0V, to form a circuit loop to eliminate static electricity. For example, no voltage is applied to both the pixel electrode 112 and the common electrode 122 so that the second preset voltage is 0V.
It should be noted that, since the display panel to be aligned is charged with static electricity during the manufacturing process, static electricity in the display panel to be aligned is eliminated, which is favorable for avoiding the problem of poor alignment of the liquid crystal molecules caused by the deflection of the liquid crystal molecules in advance due to static electricity.
S105: the liquid crystal composition in the display panel to be aligned is loaded with a third preset voltage.
Specifically, the liquid crystal composition in the display panel to be aligned 100 is loaded with a third preset voltage, which is a difference between voltages loaded to the pixel electrode 112 and the common electrode 122, and the third preset voltage is greater than the first preset voltage V1. Since the third preset voltage is greater than the first preset voltage V1, the long axes of the liquid crystal molecules 118 are substantially disposed along a direction perpendicular to the thickness of the display panel 100 to be aligned, and the order of the arrangement of the liquid crystal molecules 118 increases.
The third preset voltage is greater than or equal to 15V and less than or equal to 18V, for example, 16V and 17V.
Further, the loading of the second preset voltage to the liquid crystal composition in the display panel 100 to be aligned and the loading of the third preset voltage to the liquid crystal composition in the display panel 100 to be aligned are sequentially alternated at least twice to further eliminate static electricity and increase the order of the arrangement of the plurality of liquid crystal molecules 118.
Specifically, the loading of the liquid crystal composition in the display panel 100 to be aligned with the second preset voltage and the loading of the liquid crystal composition in the display panel 100 to be aligned with the third preset voltage are sequentially alternated twice.
Fig. 5 is a flowchart illustrating an alignment method of a display panel according to another embodiment of the application. The alignment method of the display panel shown in fig. 5 is substantially similar to the alignment method of the display panel shown in fig. 1, except that after the second light irradiation is performed on the display panel 100 to be aligned, the method further includes:
s106: and (3) carrying out third light irradiation on the display panel to be aligned after the second light irradiation treatment, and carrying out polymerization reaction on the rest photoreactive monomer under the action of the third light irradiation.
Specifically, the third ultraviolet light is incident to the display panel 100 to be aligned from a side of the second substrate 120 away from the first substrate 110, the third ultraviolet light passes through the second substrate 120 and irradiates the liquid crystal composition, the rest of the photoinitiator in the liquid crystal composition is activated under the action of the third ultraviolet light, and the rest of the photoreactive monomer after the second irradiation is polymerized under the irradiation of the third ultraviolet light.
The wavelength of the third ultraviolet light is the same as that of the first ultraviolet light L1, and the illuminance of the third ultraviolet light is smaller than that of the first ultraviolet light L1, so that the service life of a lamp tube for emitting the third ultraviolet light is prolonged while the reaction of the residual photoreactive monomer is ensured.
The time of the third light irradiation is more than or equal to 60s, so as to ensure that the residual photoreactive monomer reacts fully. In the third light irradiation, no voltage was applied to the liquid crystal molecules, and the temperature was 25 degrees celsius at room temperature.
It should be noted that, compared to the alignment method shown in fig. 1, in the present embodiment, under the condition of ensuring that the pretilt angle difference of the liquid crystal molecules is small, the reaction amount of the photoreactive monomer is further increased, and the anchoring force of the polymer after polymerization of the photoreactive monomer to the liquid crystal molecules is increased.
It will be appreciated that step S106 may also be combined with step S104 and step S105 in fig. 4.
The application also provides a display panel which is manufactured by the alignment method of the display panel.
The application also provides a display device, which comprises the display panel and a backlight module, wherein the backlight module is positioned on the light incident side of the display panel.
The above description of the embodiments is only for helping to understand the technical solution of the present application and its core ideas; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. An alignment method of a display panel, the method comprising:
providing a display panel to be aligned, wherein the display panel to be aligned comprises a first substrate, a second substrate, a liquid crystal composition, a first alignment layer and a second alignment layer which are oppositely arranged, the first alignment layer is arranged on the surface of the first substrate, which is close to the second substrate, the second alignment layer is arranged on the surface of the second substrate, which is close to the first substrate, the liquid crystal composition is arranged between the first alignment layer and the second alignment layer, and the liquid crystal composition comprises a plurality of liquid crystal molecules and a plurality of photoreactive monomers;
before the liquid crystal molecules form a preset pretilt angle, carrying out first light irradiation on the display panel to be aligned, and carrying out polymerization reaction on part of the photoreactive monomer under the first light irradiation;
and loading a first preset voltage on the liquid crystal composition, simultaneously carrying out second light irradiation on the display panel to be aligned, deflecting a plurality of liquid crystal molecules under the action of the first preset voltage, deflecting the liquid crystal molecules close to the first alignment layer and the second alignment layer until the liquid crystal molecules have a preset pretilt angle, and carrying out polymerization reaction on at least part of the rest of the photoreactive monomers under the second light irradiation.
2. The alignment method of a display panel according to claim 1, wherein the first light irradiation has the same wavelength as light employed in the second light irradiation, and a duration of the first light irradiation is shorter than a duration of the second light irradiation.
3. The alignment method of a display panel according to claim 1, wherein before the first light irradiation is performed on the display panel to be aligned, the method further comprises:
and carrying out static electricity removal treatment on the display panel to be aligned.
4. The alignment method of a display panel according to claim 3, wherein the performing the static electricity removing process on the display panel to be aligned comprises:
and loading a second preset voltage to the liquid crystal composition in the display panel to be aligned.
5. The alignment method of a display panel according to claim 4, wherein after loading a second preset voltage on the display panel to be aligned and before performing the first light irradiation on the display panel to be aligned, the method further comprises:
loading a third preset voltage to the liquid crystal composition in the display panel to be aligned, wherein the third preset voltage is larger than the first preset voltage.
6. The alignment method of claim 5, wherein the loading of the liquid crystal composition in the display panel to be aligned with a second preset voltage and the loading of the liquid crystal composition in the display panel to be aligned with a third preset voltage are sequentially alternated at least twice.
7. The alignment method of a display panel according to claim 1, wherein after the second light irradiation is performed on the display panel to be aligned, the method further comprises:
and carrying out third light irradiation on the display panel to be aligned after the second light irradiation treatment, and carrying out polymerization reaction on the rest of the photoreactive monomer under the action of the third light irradiation.
8. The alignment method of claim 1, wherein the display panel to be aligned further comprises a filter layer disposed between the first substrate and the first alignment layer, and the light used for the first light irradiation and the second light irradiation is incident from a side of the second substrate away from the first substrate.
9. The alignment method of claim 1, wherein the first alignment layer and the second alignment layer have a thickness of greater than or equal to 70 microns and less than or equal to 100 microns.
10. A display panel, characterized in that the display panel is manufactured by the alignment method of the display panel according to any one of claims 1-9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087440A (en) * | 2009-12-08 | 2011-06-08 | 华映视讯（吴江）有限公司 | Method for manufacturing liquid crystal display panel |
| CN102566129A (en) * | 2012-02-29 | 2012-07-11 | 深圳市华星光电技术有限公司 | Optical self-compensating bending type liquid crystal display panel and manufacturing method thereof |
| CN104035238A (en) * | 2014-04-23 | 2014-09-10 | 友达光电股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN111413827A (en) * | 2020-04-20 | 2020-07-14 | Tcl华星光电技术有限公司 | Liquid crystal display panel and pretilt angle forming method |
| CN111552121A (en) * | 2020-05-08 | 2020-08-18 | 深圳市华星光电半导体显示技术有限公司 | Alignment film, display panel and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI372294B (en) * | 2008-07-21 | 2012-09-11 | Au Optronics Corp | Liquid crystal display panel and fabricating method thereof |
| KR102600513B1 (en) * | 2016-05-10 | 2023-11-09 | 삼성디스플레이 주식회사 | Liquid crystal display and manufacturing method thereof |
-
2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087440A (en) * | 2009-12-08 | 2011-06-08 | 华映视讯（吴江）有限公司 | Method for manufacturing liquid crystal display panel |
| CN102566129A (en) * | 2012-02-29 | 2012-07-11 | 深圳市华星光电技术有限公司 | Optical self-compensating bending type liquid crystal display panel and manufacturing method thereof |
| CN104035238A (en) * | 2014-04-23 | 2014-09-10 | 友达光电股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN111413827A (en) * | 2020-04-20 | 2020-07-14 | Tcl华星光电技术有限公司 | Liquid crystal display panel and pretilt angle forming method |
| CN111552121A (en) * | 2020-05-08 | 2020-08-18 | 深圳市华星光电半导体显示技术有限公司 | Alignment film, display panel and preparation method thereof |
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