CN113589575A - Manufacturing method of polymer honeycomb network liquid crystal display - Google Patents
Manufacturing method of polymer honeycomb network liquid crystal display Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000178 monomer Substances 0.000 claims abstract description 23
- 230000005684 electric field Effects 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 6
- 210000002858 crystal cell Anatomy 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005191 phase separation Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 17
- 239000002131 composite material Substances 0.000 description 7
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- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 1
- LVGFPWDANALGOY-UHFFFAOYSA-N 8-methylnonyl prop-2-enoate Chemical compound CC(C)CCCCCCCOC(=O)C=C LVGFPWDANALGOY-UHFFFAOYSA-N 0.000 description 1
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- -1 lauryl ester Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F1/13345—Network or three-dimensional gels
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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
- G02F1/13378—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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a manufacturing method of a polymer honeycomb net liquid crystal display. The display is composed of two transparent conductive glass (or film) sandwich polymer honeycomb liquid crystal films, wherein the polymer is a photopolymerization monomer which is easy to polymerize along the vertical light beam propagation direction; the liquid crystal is a positive nematic liquid crystal. The manufacturing method of the display comprises the steps of firstly manufacturing a TN type hollow liquid crystal box, then filling a mixed liquid of liquid crystal and a prepolymer, and then performing vertical exposure and phase separation by collimated ultraviolet light, wherein the polymer forms a honeycomb pore network distributed along two dimensions in the liquid crystal box, and thus the polymer honeycomb network liquid crystal display is formed. The polymer honeycomb net liquid crystal display is in a scattering fog state in zero electric field, and is in a transparent state after voltage is applied, and the transparent state and the scattering state have obvious contrast to form a display effect. The polymer honeycomb net liquid crystal display has the characteristics of simple structure, low cost, easy manufacture and the like, and is suitable for being used as a display of special purposes of certain low-value consumable products.
Description
Technical Field
The invention relates to a liquid crystal display device, in particular to a manufacturing method of a polymer honeycomb network liquid crystal display device.
Background
As composite systems of polymer and liquid crystal, there are known a classification into Polymer Dispersed Liquid Crystal (PDLC) and Polymer Network Liquid Crystal (PNLC). Polymer dispersed liquid crystal is a polymer with a polymer content above about 30%, and the polymer forms a spherical cavity matrix to disperse the liquid crystal into small droplets. Polymer network liquid crystals are polymers with a polymer content of less than about 15%, the liquid crystals forming a matrix and the polymers forming a network of silk-chain strands discretely distributed in the liquid crystal layer. The PDLC product which is industrialized and has a large market is applied to an electric control light adjusting film; the PNLC product which is industrialized and has a larger market is applied to a liquid crystal writing board (polymer network stabilized cholesteric liquid crystal). The PDLC or PNLC is applied to a display and is also a new product development direction in the industry, the PDLC or PNLC is in a scattering state (trans is a transparent state) when having a zero electric field, and is in a transparent state (trans is a scattering state) when an electric field is applied, and characters or graphs are displayed by contrast of the scattering state and the transparent state. Although the PDLC or PNLC display has narrow application range and small market, the PDLC or PNLC display has high development value because the PDLC or PNLC display does not need a polaroid, and has simple structure, low cost and easy manufacture.
Disclosure of Invention
The invention provides a method for manufacturing a display of a novel composite system of a polymer and liquid crystal, wherein the polymer content is between 15 and 30 percent. The invention not only fills the blank in the research field of polymer and liquid crystal composite systems, but also develops a novel display device with certain application market. As PDLC and PNLC are known in the industry, a new name is required to be given to a new composite system of polymer and liquid crystal with the polymer content of 15-30%. It is conceivable that such a content of polymer is such that it does not form a polymer matrix in which the liquid crystal is dispersed, nor does it form a discretely interlaced network, but rather forms a sufficiently dense network, or even interconnected cell microcavities. As an ideal model, it is not assumed that it forms a network similar to a honeycomb network, referred to as a honeycomb network for short, and thus this new composite system of polymer and liquid crystal is not referred to as "Polymer Honeycomb Liquid Crystal (PHLC)".
The invention provides a polymer honeycomb net liquid crystal display, which is formed by pouring a prepolymer and liquid crystal mixed liquid into a low pretilt angle TN liquid crystal box, wherein the content of the prepolymer accounts for 15-30% of the mixed liquid, the prepolymer is a photopolymerizable monomer which is easy to polymerize along the vertical light beam propagation direction, the liquid crystal is positive nematic liquid crystal, the photopolymerizable monomer forms a polymer communicating pore passage honeycomb network which is distributed along the two-dimensional horizontal direction in the liquid crystal box after exposure of vertical plane incident collimated light source ultraviolet light, and liquid crystal molecules are distributed along the two-dimensional random horizontal direction on the surface of the liquid crystal box. When no electric field exists, the liquid crystal box is in a scattering state; upon application of an electric field, the liquid crystal cell assumes a transparent state. The scattering state forms a distinct contrast with the transparent state and thus constitutes a character or graphic display. The polymer and liquid crystal composite system proposed in the past is PDLC with relatively high polymer content or PNLC with relatively low polymer content, and no special attention is paid to the system with the polymer content of approximately 15-30%, so that the polymer and liquid crystal composite system has innovation in the concept of polymer honeycomb liquid crystal.
The invention provides a manufacturing method of a polymer honeycomb network liquid crystal display, which comprises the following steps:
firstly, manufacturing a TN liquid crystal empty box with characters or graphs and a low pretilt angle according to a conventional process;
secondly, preparing a liquid crystal and prepolymer mixed solution according to a conventional process;
step three, pouring liquid crystal and prepolymer mixed liquid into the empty liquid crystal box according to a conventional process;
and fourthly, ultraviolet light exposure is carried out according to a special process, and the special point is that the light source is collimated vertical plane incident ultraviolet light.
The liquid crystal display prepared by the steps is a scattering fog-state glass sheet (or film) in appearance, and after an electric field is applied, the appearance becomes a display capable of displaying characters or figures.
In the existing PDLC or PNLC products, people naturally adopt a surface light source to carry out ultraviolet light exposure phase separation, which is a known technology in the industry. The method for manufacturing the polymer honeycomb net liquid crystal display emphasizes ultraviolet light exposure according to a special process, and is characterized in that a light source is quasi-straight vertical plane incident ultraviolet light. This is based on the recent research efforts of the present inventors, and it was experimentally found that some linear monomers have a characteristic of being easily polymerizable in a direction perpendicular to the propagation direction of a light beam. Optically, if the direction of beam propagation is taken as the z-axis and the direction of perpendicular beam propagation is taken as the x-and y-axes, some monomers tend to polymerize along the z-direction of beam propagation, while some other monomers tend to polymerize along the x-and y-directions of perpendicular beam propagation. Indeed, photopolymerizable monomers are a very large family of organic molecules, which most monofunctional or multifunctional linear monomers do not possess, but are still easily found experimentally. From the view point of molecular physics, pi electron cloud or sigma electron cloud exists in organic matter molecules, and can be stably or concussively influenced or not influenced by polarized light disturbance, so that polymerization or non-polymerization occurs, and then photo-induced directional polymerization reaction occurs. The multifunctional monomer is easy to polymerize into multi-branched polymer. Generally, the large-area ultraviolet light area source is used in experiments or production, the light beam propagation direction is in all directions, and the prepared sample is certainly that polymer silk chains are in three-dimensional scattered distribution, so that the characteristic of polarized light induced oriented polymerization of certain photopolymerizable monomers is covered.
The invention provides a manufacturing method of a polymer honeycomb net liquid crystal display, which is characterized in that polarized light is adopted to induce and orient polymerization monomers, and a light source is a collimated light source for vertical incident ultraviolet light exposure, so that the invention has innovation on materials and process technical conditions in the manufacturing method. Since the most primitive patents for PDLC or PNLC have been invalid over the past thirty years, none of these prior patents are generally conceptual-connotative and are generally material-only, as most patents claim to a liquid crystal composition or a combination system of polymer components.
The invention provides an application of a polymer honeycomb net liquid crystal display, which has the characteristics of simple structure, low cost, easy manufacture, low driving voltage and the like, and is suitable for being used as special display devices of certain low-value and consumable products, such as children toy displays and the like.
Compared with the prior art, the polymer for PDLC generally comprises a mixed solution of a plurality of monomers and oligomers, for example, the mixed solution contains the monomers of isobornyl acrylate (IBOA), lauryl ester (LA), trimethylolpropane triacrylate (TMPTA) and the like; the mixed solution contains oligomer such as polyester acrylate, urethane acrylate, epoxy acrylate, etc. Monomers for PNLC are generally selected from multifunctional linear monomers for polymerization into networks. The claims set forth by the inventors in the technical background of polymeric materials are generally directed to the general structural formulae of liquid crystals or polymers. The material requirement of the invention is that the monomer can be photo-induced to be directionally polymerized in the direction vertical to the propagation direction of the light beam, and the monomer can be easily found in a plurality of experiments. Compared with the prior art, the PDLC or PNLC product adopts a large-area ultraviolet light source in the manufacturing process, and the invention needs to adopt a collimation vertical plane incident point light source, so that a collimation diaphragm device needs to be added between the surface light source and the product to meet the requirement of transforming the surface light source into the collimation vertical plane incident point light source. Compared with the prior art, the CN106281361B patent shows that the polymer content is very low, and is almost optional, the homeotropic arrangement of the negative liquid crystal molecules is restrained by the homeotropic orientation of the liquid crystal box substrate, and the function of the polymer network can not be seen at all. The polymer mesh liquid crystal display provided by the invention has the advantages that the density of the polymer silk chain network is higher, the polymer silk chain network is prone to arrangement along the surface, and the polymer network with a certain concentration can achieve the strong scattering effect of the PDLC polymer dispersed liquid crystal microdrops.
Drawings
FIG. 1 is a schematic diagram of PHLC principle in scattering state before power-up: 1. an upper glass substrate; 2. an ITO conductive layer is arranged; 3. an upper low pretilt alignment layer; 4. the transverse lying orientation polymer bee net is distributed in two dimensions in the easy plane; 5. two-dimensionally distributing transversely-lying oriented liquid crystal molecules in an easy plane; 6. a lower low pretilt alignment layer (orthogonal to the upper low pretilt alignment layer); 7. a lower ITO conductive layer; 8. a lower glass substrate.
FIG. 2 is a schematic diagram of the PHLC principle in a transparent state after power-up: 9. an upper glass substrate; 10. an ITO conductive layer is arranged; 11. an upper low pretilt alignment layer; 12. the transverse lying orientation polymer bee net is distributed in two dimensions in the easy plane; 13. liquid crystal molecules erected along the direction of the electric field; 14. a lower low pretilt alignment layer (orthogonal to the upper low pretilt alignment layer); 15. a lower ITO conductive layer; 16. a lower glass substrate.
FIG. 3 is a schematic diagram of a device for transforming a surface light source into a collimated vertical incident point light source: 17. an upper ultraviolet light area light source; 18. an upper collimating diaphragm array; 19. an article of manufacture; 20. a lower collimating diaphragm array; 21. a source of ultraviolet light.
Detailed Description
The present invention is described below with reference to specific examples.
Firstly, etching a low pretilt angle TN liquid crystal empty box with a cartoon pattern according to a conventional process: liquid crystal cell size 3X 4cm2The gap of the liquid crystal box is 5 mu m, the pretilt angle of the liquid crystal box is about 1 degree, the friction angles of the upper substrate and the lower substrate of the liquid crystal box are orthogonal, and the thickness of the ITO glass is 0.7 mm.
Step two, preparing a liquid crystal and prepolymer mixed solution according to a conventional process: X3P-1184 (n) from Nicotiana Kogyo for liquid Crystalo＝1.512，ne1.722, Δ n is 0.21); long-pending chemical product EM219 isodecyl acrylate (ISODA, n) for prepolymer monomer with easy polymerization direction perpendicular to light beam propagation direction11.438), a high refractive index monomer for adjusting the refractive index of the prepolymer, and an enhanceable chemical product EM2209-1 difunctional acrylate monomer (n)21.60-1.61); the mixing ratio of the two monomers is that the EM219 to the EM2209-1 is 0.75: 0.25 (namely 3 to 1); after mixing the two monomers, a small amount of photoinitiator 1173 (2-hydroxy-2-methyl-1-phenyl-1-propanone (HMPP) is added to about 1%, and the prepolymer is mixed with liquid crystal at a ratio of 0.25: 0.75 (i.e. 1: 3).
Step three, pouring mixed liquid into the empty liquid crystal box according to a conventional process: the viscosity of the liquid crystal and prepolymer mixed liquid is lower, and the liquid crystal and prepolymer mixed liquid can be easily poured into a liquid crystal box according to the conventional LCD process.
Fourthly, ultraviolet exposure (light intensity KW/m) according to a special process2And the exposure time is 2min), and is characterized in that the light source is collimated vertical plane incident ultraviolet light (the schematic diagram of the device is shown in figure 3).
The liquid crystal display prepared by the steps is a scattering fog-state glass sheet (also can be a film) in appearance, can display cartoon patterns after an electric field is applied, and can be used as a low-value consumable display on a toy.
In summary, the above-described examples illustrate the invention in detail, but do not limit the scope of the invention. After reading this disclosure, those skilled in the art will make minor changes and modifications to the invention without departing from the spirit and scope of the invention.
Claims (3)
1. A polymer mesh liquid crystal display, comprising:
the film is composed of two transparent conductive glass (or film) sandwich polymer honeycomb net liquid crystal films;
the polymer is a photo-polymerization monomer which is easy to polymerize along the vertical light beam propagation direction;
the liquid crystal is a positive nematic liquid crystal;
the polymer content is between 15 and 30 percent.
2. A manufacturing method of a polymer honeycomb network liquid crystal display is characterized by comprising the following steps:
firstly, manufacturing a low pretilt angle liquid crystal empty box with characters or graphs according to a conventional process;
secondly, preparing a liquid crystal and prepolymer mixed solution according to a conventional process;
step three, pouring mixed liquid into the empty liquid crystal box according to a conventional process;
and fourthly, ultraviolet light exposure is carried out according to a special process, and the special point is that the light source is collimated vertical plane incident ultraviolet light.
3. A polymer bee net liquid crystal display is characterized in that the liquid crystal box is in a scattering state in the absence of an electric field; upon application of an electric field, the liquid crystal cell assumes a transparent state. The scattering state forms a distinct contrast with the transparent state and thus constitutes a character or graphic display.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117031842A (en) * | 2023-10-10 | 2023-11-10 | 宜宾佳信电子科技有限公司 | Liquid crystal display and preparation method thereof |
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| JP2009048062A (en) * | 2007-08-22 | 2009-03-05 | Sony Corp | Manufacturing method of liquid crystal display device and liquid crystal display device |
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