CN110806661A - Alignment ultraviolet ray irradiation machine and liquid crystal alignment method - Google Patents
Alignment ultraviolet ray irradiation machine and liquid crystal alignment method Download PDFInfo
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- CN110806661A CN110806661A CN201911169817.0A CN201911169817A CN110806661A CN 110806661 A CN110806661 A CN 110806661A CN 201911169817 A CN201911169817 A CN 201911169817A CN 110806661 A CN110806661 A CN 110806661A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 87
- 239000010408 film Substances 0.000 claims description 13
- 239000010409 thin film Substances 0.000 claims description 10
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 239000000178 monomer Substances 0.000 description 8
- 230000004044 response Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- G02F1/1337—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
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Abstract
The invention relates to an alignment ultraviolet ray irradiation machine and a liquid crystal alignment method, wherein the alignment ultraviolet ray irradiation machine comprises: a cavity; the carrying platform is arranged at the bottom in the cavity and is used for carrying the liquid crystal display substrate; at least two ultraviolet light sources emitting different wavelengths and used for carrying out ultraviolet alignment on liquid crystals in the liquid crystal display substrate; and at least one rotatable lamp holder is arranged at the top in the cavity, each lamp holder is provided with at least two ultraviolet light sources, and each lamp holder is used for rotating the ultraviolet light sources corresponding to the ultraviolet alignment required wavelength to the lower part of the lamp holder to irradiate the liquid crystal display substrate, so that the cost can be reduced.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to an alignment ultraviolet ray irradiation machine and a liquid crystal alignment method.
Background
The polymer stabilized vertical alignment (PS-VA) enables the Liquid Crystal Display panel to have the characteristics of high contrast, fast response time, and the like, and the Liquid Crystal Display (LCD) prepared by using the technology is increasingly applied in the fields such as televisions, billboards, vehicles, electronic contests, and the like. Particularly for competitive products such as competitive computer displays, the response time is required to be faster than that of ordinary products, and therefore, it is more necessary to prepare a liquid crystal display panel by using a polymer-stabilized vertical alignment technology and then apply the liquid crystal display panel to the field.
A conventional liquid crystal display panel generally includes a Color Filter (CF) substrate, a Thin Film Transistor (TFT) substrate, and a Liquid Crystal (LC) sandwiched between the Color Filter substrate and the TFT substrate, wherein the TFT substrate and the Color Filter substrate respectively have an alignment film thereon. In the process of forming the liquid crystal display panel into the box, voltage is applied to a substrate to enable liquid crystal to be poured, a Reactive Monomer (RM) is contained in the liquid crystal, the reactive monomer in the liquid crystal is subjected to polymerization reaction in a mode of irradiating ultraviolet light (UV) to the substrate by a polymer stable vertical alignment technology, so that a pretilt angle is formed in the liquid crystal, the process is called ultraviolet alignment, after the alignment is completed, the ultraviolet light irradiation is carried out for a long time again to enable residual reactive monomer to be subjected to polymerization reaction, and the alignment process is completed.
The uv alignment of the liquid crystal is achieved by aligning uv irradiators, but the uv wavelengths required by different liquid crystal systems are usually different, for example, the wavelengths required by the conventional liquid crystal system and the reactive monomer of the fast response liquid crystal system are different, and if two uv irradiators of different wavelength types are provided, the cost is high.
Disclosure of Invention
In view of the above, it is desirable to provide an alignment ultraviolet irradiator and a liquid crystal alignment method that can reduce the cost.
In a first aspect, an alignment ultraviolet irradiator is provided, comprising:
a cavity;
the carrying platform is arranged at the bottom in the cavity and is used for carrying the liquid crystal display substrate;
at least two ultraviolet light sources emitting different wavelengths and used for carrying out ultraviolet alignment on liquid crystals in the liquid crystal display substrate; and
the liquid crystal display device comprises a cavity, at least one rotatable lamp holder arranged at the top in the cavity, at least two ultraviolet light sources arranged on each lamp holder, and each lamp holder is used for rotating the ultraviolet light sources corresponding to the ultraviolet alignment required wavelength to the lower part of the lamp holder to irradiate the liquid crystal display substrate.
Above-mentioned join in marriage ultraviolet ray irradiation machine, can set up the ultraviolet light source of two at least different wavelength that are used for ultraviolet to join in marriage on the rotatable lighting fixture, when ultraviolet is joined in marriage and needs which kind of wavelength, the ultraviolet light source that required wavelength corresponds just is rotated to lighting fixture below by the rotatable lighting fixture and shines the liquid crystal display base plate, when needing another kind of wavelength, just can rotate the ultraviolet light source that another wavelength corresponds to the lighting fixture below, just only with an ultraviolet ray irradiation machine just can realize the production of multiple different liquid crystal system products, can reduce cost.
In a second aspect, a liquid crystal alignment method is provided, the alignment method comprising:
providing a liquid crystal display substrate and an alignment ultraviolet ray irradiation machine, wherein the liquid crystal display substrate comprises a color film substrate, a thin film transistor substrate and liquid crystal sandwiched between the color film substrate and the thin film transistor substrate, the thin film transistor substrate and the color film substrate are respectively provided with an alignment film, and the alignment ultraviolet ray irradiation machine comprises a cavity; the carrying platform is arranged at the bottom in the cavity and is used for carrying the liquid crystal display substrate; at least two ultraviolet light sources emitting different wavelengths and used for carrying out ultraviolet alignment on liquid crystals in the liquid crystal display substrate; the rotatable lamp holders are arranged at the top in the cavity, each lamp holder is provided with at least two ultraviolet light sources, and each lamp holder is used for rotating the ultraviolet light source corresponding to the wavelength required by ultraviolet alignment to the position below the lamp holder to irradiate the liquid crystal display substrate;
and pressurizing the liquid crystal display substrate by utilizing an electrifying system, rotating an ultraviolet light source corresponding to the wavelength required by the ultraviolet alignment of the liquid crystal display substrate to the lower part of the lamp holder, and irradiating the liquid crystal display substrate to enable liquid crystals in the liquid crystal display substrate to generate polymerization reaction so as to form a pre-tilt angle.
According to the liquid crystal alignment method, the alignment ultraviolet ray irradiation machine is used for ultraviolet alignment, at least two ultraviolet ray light sources with different wavelengths for ultraviolet alignment can be arranged on the rotatable lamp holder, when the ultraviolet alignment needs to be carried out with which wavelength, the ultraviolet ray light source corresponding to the needed wavelength is rotated to the position below the lamp holder by the rotatable lamp holder to irradiate the liquid crystal display substrate, when the other wavelength is needed, the ultraviolet ray light source corresponding to the other wavelength can be rotationally switched to the position below the lamp holder, the production of various liquid crystal system products can be realized by only one ultraviolet ray irradiation machine, and the cost can be reduced.
Drawings
FIG. 1 is a schematic structural diagram of an alignment UV irradiator according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an alignment UV irradiator according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an alignment UV irradiator with 7 lamp holders according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lamp holder according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a three-sided stand according to a first embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a three-sided stand according to a second embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a four-sided stand according to a first embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a four-sided stand according to a second embodiment of the present invention;
fig. 9 is a flowchart illustrating a liquid crystal alignment method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the present invention provides an alignment ultraviolet irradiation machine, configured to perform ultraviolet alignment on liquid crystals, as shown in fig. 1, the alignment ultraviolet irradiation machine includes:
a cavity 110;
a carrier 120, disposed at the bottom of the cavity 110, for carrying a liquid crystal display substrate 130;
at least two ultraviolet light sources 140 emitting different wavelengths for ultraviolet alignment of liquid crystals in the liquid crystal display substrate 130; and
at least one rotatable lamp holder 150 is disposed at the top of the cavity 110, at least two types of the ultraviolet light sources 140 are disposed on each lamp holder 150, and each lamp holder 150 is configured to rotate the ultraviolet light source 140 corresponding to the wavelength required for ultraviolet alignment to the lower side to irradiate the liquid crystal display substrate 130.
In one embodiment, as shown in fig. 2, the alignment ultraviolet irradiator in the embodiment of the present invention further includes an energizing system 160 disposed outside the cavity 110 for applying a voltage to the substrate to control the liquid crystal molecules to change the direction.
It should be noted that each of the lamp holders 150 of fig. 1 and 2 only shows two light sources, and actually, three or more light sources may be provided on each lamp holder 150.
For the ultraviolet light source 140, specifically, the ultraviolet light source 140 may be an ultraviolet lamp tube. The ultraviolet light source 140 is disposed at a side of the lamp holder 150 and can rotate with the lamp holder 150. The wavelength range of each light source can be 280 nm-500 nm. The ultraviolet light sources 140 include at least one of the ultraviolet light sources 140 emitting a wavelength of 313nm and the ultraviolet light sources 140 emitting a wavelength of 365 nm. If a general liquid crystal system is required, the ultraviolet light source 140 with a wavelength of 313nm is rotated to the lower side of the lamp holder 150 to irradiate the liquid crystal display substrate during the ultraviolet alignment, and if a fast response liquid crystal system is required, the ultraviolet light source 140 with a wavelength of 365nm is rotated to the lower side of the lamp holder 150 to irradiate the liquid crystal display substrate 130.
When the ultraviolet light source 140 is used for irradiating the liquid crystal display substrate, the wavelength of the polymerization reaction of the reactive monomer of the common liquid crystal system is 313nm, the wavelength required by the polymerization reaction of the fast response liquid crystal is 365nm, and each lamp holder 150 is provided with an ultraviolet light source emitting 313nm wavelength and an ultraviolet light source emitting 365nm wavelength, so that the wavelength requirements of two products of the common liquid crystal system and the fast response liquid crystal system can be met, two alignment ultraviolet ray irradiation machines are not needed, and the equipment cost and the operation cost can be saved.
Specifically, the light sources on each lamp holder 150 are the same in type and the same in number, so as to facilitate the illumination uniformity in the ultraviolet alignment. When each ultraviolet light source 140 is an ultraviolet lamp tube, each ultraviolet lamp tube is axially arranged along the lamp holder 150, so that the transverse space of the lamp holder 150 can be saved, the rotation of the ultraviolet light source 140 is facilitated, and the number of each ultraviolet lamp tube on each lamp holder 150 can be one. When the ultraviolet light sources 140 corresponding to the wavelengths required for the ultraviolet alignment are rotated downward, the unnecessary ultraviolet light sources 140 are not positioned under the lamp holder 150 and are turned off. For example, as shown in fig. 3, a total of 7 lamp holders 150 are installed in the cavity 110, each lamp holder 150 is installed with two lamp tubes, one is an ultraviolet lamp tube emitting 365nm wavelength ultraviolet light, the other is an ultraviolet lamp tube emitting 313nm wavelength ultraviolet light, when the ultraviolet light with 313nm wavelength needs to be irradiated, the ultraviolet lamp tubes with 313nm wavelength on the 7 lamp holders 150 are all rotated to the lower side to irradiate the liquid crystal display substrate 130, and the ultraviolet lamp tubes with 365nm wavelength are all rotated to the upper side of the lamp holders 150 and are closed, so as to avoid causing interference.
Specifically, each lamp holder 150 is arranged in parallel and transversely at equal intervals, the height of each lamp holder 150 relative to the liquid crystal display substrate is the same, the position of the same ultraviolet light source 140 on each lamp holder 150 is the same, when the ultraviolet alignment of the liquid crystal display substrate 130 is required, the lamp holders 150 are rotated to rotate the corresponding ultraviolet light sources 140 to the lower side of the lamp holders 150, the light sources with the same wavelength are all arranged at the same position and are also arranged in parallel at equal intervals, the distance between the light sources and the liquid crystal display substrate 130 is also equal, and the uniform irradiation of the liquid crystal display substrate 130 is facilitated.
For example, as shown in fig. 3, each lamp holder 150 has a 365nm ultraviolet lamp and a 313nm ultraviolet lamp, a total of 7 lamp holders 150, 7 lamp holders 150 are arranged in parallel and at equal intervals and are separated from each other, the two lamps on the 7 lamp holders 150 are arranged in an opposite manner, if 313nm ultraviolet lamp is required for ultraviolet alignment, all the 365nm ultraviolet lamps on the 7 lamp holders 150 rotate to the upper side, all the 7 313nm ultraviolet lamps rotate to the lower side, all the 313nm ultraviolet lamps are in a horizontal plane and are arranged in parallel at equal intervals in the transverse direction, and the liquid crystal display substrate 130 below can be uniformly irradiated. Similarly, if 365nm ultraviolet lamps are required for ultraviolet alignment, all 365nm ultraviolet lamps are on a horizontal plane.
As for the lamp holders 150, the lamp holders 150 may adopt an electric rotation manner, in one embodiment, as shown in fig. 4, each of the lamp holders 150 includes a rotating shaft 152, a motor 154 and a supporting frame 156, the supporting frame 156 is sleeved on the rotating shaft 152, the ultraviolet light source 140 is disposed on the supporting frame 156, and an output shaft of the motor 154 is mechanically connected to the rotating shaft 152, and is configured to control the rotating shaft 152 to rotate, so as to drive the ultraviolet light source 140 on the supporting frame 156 to rotate.
It should be noted that the view direction of fig. 4 is perpendicular to the view directions of fig. 1 to 3.
Specifically, the rotating shaft 152 and the supporting frame 156 of each lamp holder 150 are disposed in the cavity 110, the motor 154 can also be disposed in the cavity 110, and in other embodiments, the motor 154 can be disposed outside the cavity 110, so that the two ends of the rotating shaft 152 of each lamp holder 150 are exposed outside the cavity 110 through the sidewall of the cavity 110, and then are mechanically connected to the output shaft of the motor 154 disposed outside the cavity 110.
Regarding the number of the motors 154, in one embodiment, the number of the motors 154 in the alignment ultraviolet irradiator is two in total, the first end of each rotating shaft 152 is mechanically connected to the output shaft of one of the motors 154, the second end of each rotating shaft 152 is mechanically connected to the output shaft of the other motor 154, and the two motors 154 are used for synchronously controlling the rotation of each lamp holder 150, so that the rotational stability can be improved. In other embodiments, each lamp holder 150 may not share the motor 154 but separately configure the motor 154, and may separately configure one motor 154, or may separately configure two motors 154, and when two motors 154 are separately configured, each end of the rotating shaft 152 is mechanically connected to an output shaft of one motor 154, so as to improve the rotational stability. Further, when each lamp holder 150 is separately provided with the motor 154, in order to enable each lamp holder 150 to rotate synchronously, the motor 154 may be electrically connected to the same controller, so that the same light source of each lamp holder 150 can rotate synchronously to the corresponding position, thereby improving the synchronism of the irradiation of the same light source to the liquid crystal display substrate.
Regarding the supporting frame 156, in one embodiment, in each lamp holder 150, the number of the side surfaces of the supporting frame 156 is the same as the number of the types of the light sources, the same type of the ultraviolet light sources 140 are disposed on the same side surface of the supporting frame 156, and the vertical distance from each type of the ultraviolet light sources 140 to the rotating shaft 152 is the same.
For example, in the case of three or four uv light sources 140 shown in fig. 5-8, circles of different patterns in fig. 5-8 represent different light sources, and the cross-sectional geometry of the support 156 is schematically illustrated, and as shown in fig. 5-8, the number of sides of the geometric shape enclosed by the cross-section of the support 156 is the same as the number of types of light sources, i.e., the number of sides of the support 156 is the same as the number of types of light sources, and the same light source is located on the same side of the support.
In this embodiment, the number of the lateral sides of the supporting frame 156 is customized according to the number of the light sources, and the vertical distances from the light sources to the rotating shaft 152 are equal, so that when the required light sources are rotated to the lower part of the lamp holder 150, the illumination intensity and the illumination uniformity can be improved. In other embodiments, the cross-sectional geometry of the support frame 156 may be circular, and in the case where there is one light source for each light source on the lamp holder 150, the spacing between the light sources on the support frame 156 may be the same.
In the alignment ultraviolet irradiation machine in the embodiment of the invention, at least two ultraviolet light sources 140 with different wavelengths for ultraviolet alignment can be arranged on the rotatable lamp holder 150, when the wavelength is required for the ultraviolet alignment, the ultraviolet light source 140 corresponding to the required wavelength is rotated to the position below the lamp holder 150 by the rotatable lamp holder 150 to irradiate the liquid crystal display substrate, when the other wavelength is required, the ultraviolet light source 140 corresponding to the other wavelength can be rotated and switched to the position below the lamp holder 150, the production of various liquid crystal system products can be realized by only using one ultraviolet irradiation machine, and the equipment cost and the operation cost can be reduced. The alignment ultraviolet ray irradiation machine in the embodiment of the invention can be applied to a primary alignment ultraviolet machine and can also be applied to a secondary alignment ultraviolet machine.
The embodiment of the present invention further provides a liquid crystal alignment method, referring to fig. 9, the alignment method includes:
step 902: providing a liquid crystal display substrate and an alignment ultraviolet ray irradiation machine, wherein the liquid crystal display substrate comprises a color film substrate, a thin film transistor substrate and liquid crystal sandwiched between the color film substrate and the thin film transistor substrate, the thin film transistor substrate and the color film substrate are respectively provided with an alignment film, as shown in fig. 2, the alignment ultraviolet ray irradiation machine comprises a cavity 110; a carrier 120, disposed at the bottom of the cavity 110, for carrying a liquid crystal display substrate 130; at least two ultraviolet light sources 140 emitting different wavelengths for performing ultraviolet alignment on the liquid crystal in the liquid crystal display substrate; at least one rotatable lamp holder 150, which is disposed at the top of the cavity 110, wherein each lamp holder 150 is provided with at least two types of the ultraviolet light sources 140, each lamp holder 150 is used for rotating the ultraviolet light source 140 corresponding to the wavelength required by the ultraviolet alignment to the lower side of the lamp holder 150 to irradiate the liquid crystal display substrate 130, and the power-up system 160.
For specific limitations of the alignment uv irradiator, reference is made to the foregoing examples, and the limitations are not repeated here.
Step 904: the energizing system 160 is used to pressurize the lcd substrate, and rotate the uv light source 140 corresponding to the wavelength of the lcd substrate 130 to the lower part of the lamp holder 150, so as to irradiate the lcd substrate, and the liquid crystal in the lcd substrate 130 is polymerized to form a pre-tilt angle.
Specifically, the step may occur in a cell forming process of the liquid crystal display panel, in which a voltage is applied to a liquid crystal display substrate to tilt liquid crystal containing reactive monomers, and the polymer-stabilized vertical alignment technique polymerizes the reactive monomers in the liquid crystal by irradiating ultraviolet light to the substrate, so that the liquid crystal forms a pre-tilt angle, which is called ultraviolet alignment, and after one alignment, the ultraviolet light irradiation is performed for a long time to polymerize the residual reactive monomers, i.e., perform a second alignment, so that the alignment process is completed.
Specifically, when the lamp holders 150 have more than two lamp holders 150, the types of the light sources on each lamp holder 150 are the same, and the number of each light source is also the same, all the lamp holders 150 may be synchronously rotated by rotating the ultraviolet light sources 140 corresponding to the wavelengths required by the liquid crystal display substrate 130 to the lower side of the lamp holders 150, so that the same ultraviolet light sources 140 are synchronously rotated to the lower side of the lamp holders 150 to irradiate the liquid crystal display substrate 130, thereby improving the irradiation synchronism and improving the irradiation uniformity.
Specifically, the uv light source 140 for irradiating the lcd substrate 130 is turned on, and other types of uv light sources 140 not required for the sub-uv alignment may be turned off so as not to cause interference.
In the liquid crystal alignment method in the embodiment of the invention, the alignment ultraviolet ray irradiator is used for ultraviolet alignment, at least two ultraviolet ray sources 140 with different wavelengths for ultraviolet alignment can be arranged on the rotatable lamp holder 150, when the ultraviolet alignment needs to be at any wavelength, the ultraviolet ray source 140 corresponding to the needed wavelength is rotated to the position below the lamp holder 150 by the rotatable lamp holder 150 to irradiate the liquid crystal display substrate, when the other wavelength is needed, the ultraviolet ray source 140 corresponding to the other wavelength can be rotated and switched to the position below the lamp holder 150, the production of various liquid crystal system products can be realized by only one ultraviolet ray irradiator, and the equipment cost and the operation cost can be reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An alignment ultraviolet ray irradiation machine, characterized by comprising:
a cavity;
the carrying platform is arranged at the bottom in the cavity and is used for carrying the liquid crystal display substrate;
at least two ultraviolet light sources emitting different wavelengths and used for carrying out ultraviolet alignment on liquid crystals in the liquid crystal display substrate; and
the liquid crystal display device comprises a cavity, at least one rotatable lamp holder arranged at the top in the cavity, at least two ultraviolet light sources arranged on each lamp holder, and each lamp holder is used for rotating the ultraviolet light sources corresponding to the ultraviolet alignment required wavelength to the lower part of the lamp holder to irradiate the liquid crystal display substrate.
2. The alignment UV irradiator according to claim 1, wherein the light sources are of the same type and the number of light sources is the same for each lamp holder.
3. The alignment UV irradiator according to claim 2, wherein each UV light source is a UV lamp tube, each UV lamp tube is disposed axially along a lamp holder, and the number of each UV lamp tube in each lamp holder is one.
4. The alignment ultraviolet irradiator according to claim 2, wherein the number of the lamp holders is two or more, each lamp holder is arranged in parallel and laterally at equal intervals, the height of each lamp holder relative to the liquid crystal display substrate is the same, and the positions of the same kind of ultraviolet light sources on the respective lamp holders are the same.
5. The alignment UV irradiator according to claim 2, wherein the UV light source comprises at least one of a 313nm wavelength and a 365nm wavelength.
6. The alignment UV irradiator according to claim 2, further comprising a power-up system disposed outside the chamber for applying a voltage to the liquid crystal display substrate to control the liquid crystal in the liquid crystal display substrate to change direction.
7. The alignment ultraviolet irradiation machine according to any one of claims 1 to 6, wherein each of the lamp holders comprises a rotating shaft, a motor and a support frame, the support frame is sleeved on the rotating shaft, the ultraviolet light source is disposed on the support frame, and an output shaft of the motor is mechanically connected to the rotating shaft for controlling the rotating shaft to rotate, thereby driving the ultraviolet light source on the support frame to rotate.
8. The alignment UV irradiator according to claim 7, wherein the number of motors in the alignment UV irradiator is two in total, the first end of each rotating shaft is mechanically connected to the output shaft of one of the motors, the second end of each rotating shaft is mechanically connected to the output shaft of the other motor, and the two motors are used for synchronously controlling the rotation of each lamp holder.
9. The alignment UV irradiator according to claim 7, wherein in each lamp holder, the number of the side surfaces of the support frame is the same as the number of the types of the light sources, the same type of UV light source is disposed on the same side surface of the support frame, and the vertical distance from each type of UV light source to the rotating shaft is the same.
10. A liquid crystal alignment method is characterized by comprising the following steps:
providing a liquid crystal display substrate and an alignment ultraviolet ray irradiation machine, wherein the liquid crystal display substrate comprises a color film substrate, a thin film transistor substrate and liquid crystal sandwiched between the color film substrate and the thin film transistor substrate, the thin film transistor substrate and the color film substrate are respectively provided with an alignment film, and the ultraviolet ray irradiation machine comprises a cavity; the carrying platform is arranged at the bottom in the cavity and is used for carrying the liquid crystal display substrate; at least two ultraviolet light sources emitting different wavelengths and used for carrying out ultraviolet alignment on liquid crystals in the liquid crystal display substrate; the rotatable lamp holders are arranged at the top in the cavity, each lamp holder is provided with at least two ultraviolet light sources, and each lamp holder is used for rotating the ultraviolet light source corresponding to the wavelength required by ultraviolet alignment to the position below the lamp holder to irradiate the liquid crystal display substrate;
and pressurizing the liquid crystal display substrate by using an electrifying system, rotating an ultraviolet light source corresponding to the wavelength required by the liquid crystal display substrate to the lower part of the lamp holder, irradiating the liquid crystal display substrate, and performing polymerization reaction on liquid crystals in the liquid crystal display substrate to form a pre-tilt angle.
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| CN111552123A (en) * | 2020-05-25 | 2020-08-18 | Tcl华星光电技术有限公司 | Ultraviolet irradiation device for liquid crystal alignment and ultraviolet irradiation method thereof |
| CN111679512A (en) * | 2020-06-05 | 2020-09-18 | Tcl华星光电技术有限公司 | Photo-alignment device and photo-alignment method |
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| CN111552123A (en) * | 2020-05-25 | 2020-08-18 | Tcl华星光电技术有限公司 | Ultraviolet irradiation device for liquid crystal alignment and ultraviolet irradiation method thereof |
| CN111679512A (en) * | 2020-06-05 | 2020-09-18 | Tcl华星光电技术有限公司 | Photo-alignment device and photo-alignment method |
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