CN108594542B - Cholesteric liquid crystal electronic paper display device with regional display and manufacturing method thereof - Google Patents
Cholesteric liquid crystal electronic paper display device with regional display and manufacturing method thereof Download PDFInfo
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- CN108594542B CN108594542B CN201810649274.1A CN201810649274A CN108594542B CN 108594542 B CN108594542 B CN 108594542B CN 201810649274 A CN201810649274 A CN 201810649274A CN 108594542 B CN108594542 B CN 108594542B
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- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 120
- 239000000758 substrate Substances 0.000 claims abstract description 86
- 239000011521 glass Substances 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000003086 colorant Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007650 screen-printing Methods 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920002120 photoresistant polymer Polymers 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 5
- 238000004528 spin coating Methods 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 3
- 238000007761 roller coating Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000002788 crimping Methods 0.000 claims description 2
- 230000031700 light absorption Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 40
- 239000000463 material Substances 0.000 description 13
- 239000004642 Polyimide Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
-
- 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
- G02F1/13718—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 a change of the texture state of a cholesteric liquid crystal
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The cholesteric liquid crystal electronic paper display device comprises a first glass substrate and a second glass substrate which are oppositely arranged, a first electrode layer arranged on the first glass substrate, a first orientation film covering the first electrode layer, a second electrode layer arranged on the second glass substrate, a second orientation film covering the second electrode layer, an outer sealing frame and an inner sealing frame which are connected with the first orientation film and the second orientation film, wherein the outer sealing frame and the inner sealing frame are of closed structures, the outer sealing frame surrounds the inner sealing frame from the outside, a plurality of closed spaces are formed among the outer sealing frame, the inner sealing frame and the first glass substrate and the second glass substrate, and cholesteric liquid crystals for displaying different colors are filled in different closed spaces. Therefore, one display area is closed and surrounded by the other display area, and the process difficulty and the cost are lower. The invention also provides a manufacturing method of the cholesteric liquid crystal electronic paper display device with the regional display.
Description
Technical Field
The invention relates to the technical field of electronic paper, in particular to a cholesteric liquid crystal electronic paper display device with regional display and a manufacturing method thereof.
Background
In the Internet of things age when the Internet enters the Internet of things, the electronic paper becomes an important display medium for information exchange and communication. The electronic paper has the image storage and display characteristics of paper-like, and is widely applied to the paper-like display fields such as electronic books, electronic shelf labels and the like by replacing a single image with ultralow power consumption. In the electronic paper market, electrophoresis type electronic paper occupies a dominant place. The principle of the electrophoresis type electronic paper is as follows: the electrophoretic particles are moved in the electrophoretic liquid by an electric field, and the particles are subjected to surface treatment and are charged or uncharged, so that various particles form a desired arrangement to display images and characters.
Along with the development of display technology, cholesteric liquid crystal electronic paper is widely applied to the display fields of shelf labels and the like due to the advantages of light weight, thinness, no need of a backlight module, low power consumption, high contrast, wide viewing angle and the like, and generally, the cholesteric liquid crystal electronic paper screen adopts printing ink with different colors and cholesteric liquid crystals on the lower surface of the liquid crystal screen in a silk-screen mode, the same-screen multicolor display is realized through subtractive color mixing, the process difficulty is high, the cost is high, a crystal filling opening is required to be reserved in a generally adopted vacuum crystal filling mode, one display area cannot be closed and surrounded by the other display area, and the requirements of application occasions such as electronic shelf labels and the like cannot be met.
Disclosure of Invention
In view of the above, the present invention provides a cholesteric liquid crystal electronic paper display device and a manufacturing method thereof, which can realize the closed surrounding of one display area and the split display of the other display area with lower process difficulty and lower cost, so as to solve the above problems.
The cholesteric liquid crystal electronic paper display device comprises a first glass substrate and a second glass substrate which are oppositely arranged, a first electrode layer arranged on the side surface of the first glass substrate, which is opposite to the second glass substrate, a first orientation film which covers the first electrode layer, a second electrode layer arranged on the side surface of the second glass substrate, which is opposite to the first glass substrate, a second orientation film which covers the second electrode layer, an outer sealing frame and an inner sealing frame which are positioned between the first glass substrate and the second glass substrate and are connected with the first orientation film and the second orientation film, wherein the outer sealing frame and the inner sealing frame are of a closed structure, the outer sealing frame and the inner sealing frame encircle the inner sealing frame from the outside, a plurality of closed spaces are formed among the outer sealing frame, the inner sealing frame and the first glass substrate and the second glass substrate, and cholesteric liquid crystals for displaying different colors are filled in different closed spaces.
Further, there is no common portion between the outer seal frame and the inner seal frame.
Further, the number of the inner sealing frames is two, namely a first inner sealing frame and a second inner sealing frame, the first inner sealing frame surrounds the second inner sealing frame from the outside, and a common part is not arranged between the first inner sealing frame and the second inner sealing frame.
Further, a first driving control chip and a first driving layer flexible circuit board which are connected with the second electrode layer are further arranged on the second glass substrate, and the first driving control chip is connected with the first driving layer flexible circuit board.
Further, the first electrode layer and the second electrode layer are both indium tin oxide transparent electrode layers.
Further, the outer sealing frame is an epoxy resin sealing frame, and the inner sealing frame is a transparent sealing frame with viscosity.
Further, the width of the outer sealing frame is 0.2-0.4mm, and the width of the inner sealing frame is 0.01-0.02mm.
A manufacturing method of a cholesteric liquid crystal electronic paper display device with regional display comprises the following steps:
step S1: manufacturing a glass substrate and an electrode layer;
Step S2: coating an orientation film on the electrode layer;
Step S3: an external sealing frame is arranged on the side surface of the second glass substrate with the second electrode layer and the second orientation film or on the side surface of the first glass substrate with the first electrode layer and the first orientation film in a screen printing mode, a plurality of internal sealing frames are arranged in a roller coating or spin coating adhesive photoresist, exposure and development mode, and corresponding closed spaces are formed between the external sealing frames and the internal sealing frames and between the adjacent internal sealing frames;
Step S4: dripping cholesteric liquid crystals of different materials into the closed space by adopting a liquid crystal dripping process;
step S5: compounding the first glass substrate and the second glass substrate;
step S6: and crimping the first driving control chip and the first driving layer flexible circuit board onto the second glass substrate.
Further, the method further comprises the step S7: and (3) coating a black light absorption layer on the lower surface of the second glass substrate by adopting a screen printing method.
Compared with the prior art, the cholesteric liquid crystal electronic paper display device with the regional display comprises a first glass substrate and a second glass substrate which are oppositely arranged, a first electrode layer arranged on the side surface of the first glass substrate, which is opposite to the second glass substrate, a first orientation film which covers the first electrode layer, a second electrode layer arranged on the side surface of the second glass substrate, which is opposite to the first glass substrate, a second orientation film which covers the second electrode layer, and an external sealing frame and an internal sealing frame which are positioned between the first glass substrate and the second glass substrate and connected with the first orientation film and the second orientation film, wherein the external sealing frame and the internal sealing frame are of a closed structure, the external sealing frame surrounds the internal sealing frame from the outside, a plurality of closed spaces are formed among the external sealing frame, the internal sealing frame and the first glass substrate, and the second glass substrate, and cholesteric liquid crystals for displaying different colors are filled in different closed spaces. Therefore, one display area is closed and surrounded by the other display area, and the process difficulty and the cost are lower. The invention also provides a manufacturing method of the cholesteric liquid crystal electronic paper display device with the regional display.
Drawings
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic top view of a cholesteric liquid crystal electronic paper display device with a split display according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of a cholesteric liquid crystal electronic paper display device with a split display according to an embodiment of the invention.
Fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Detailed Description
Specific embodiments of the present invention will be described in further detail below based on the drawings. It should be understood that the description herein of the embodiments of the invention is not intended to limit the scope of the invention.
Referring to fig. 1 to 3, the cholesteric liquid crystal electronic paper display device for displaying in a divided area provided by the present invention includes a first glass substrate 1 and a second glass substrate 2 disposed opposite to each other, a first electrode layer 17 disposed on a side surface of the first glass substrate 1 opposite to the second glass substrate 2, a first alignment film 18 covering the first electrode layer 17, a second electrode layer 22 disposed on a side surface of the second glass substrate 2 opposite to the first glass substrate 1, a second alignment film 21 covering the second electrode layer 22, an external sealing frame 3 and an internal sealing frame 4 disposed between the first glass substrate 1 and the second glass substrate 2 and connected to the first alignment film 18 and the second alignment film 21, wherein the external sealing frame 3 and the internal sealing frame 4 are both of a closed structure, the external sealing frame 3 surrounds the internal sealing frame 4 from outside, and no common part is present between the external sealing frame 3 and the internal sealing frame 4. In the present embodiment, the number of the inner seal frames 4 is two, namely, a first inner seal frame and a second inner seal frame, the first inner seal frame surrounds the second inner seal frame from the outside, and there is no common portion between the first inner seal frame and the second inner seal frame. In the present embodiment, the first electrode layer 17 is an SEG electrode, and the second electrode layer 22 is a COM electrode.
The outer sealing frame 3 and the inner sealing frame 4 bond the first glass substrate 1 and the second glass substrate 2 together at a predetermined interval, and form 3 enclosed spaces A, B, C with the first glass substrate 1 and the second glass substrate 2, wherein the enclosed space a is completely located in the second inner sealing frame, the enclosed space B is located between the first inner sealing frame and the second inner sealing frame, and the enclosed space C is located between the first inner sealing frame and the outer sealing frame 3. The second glass substrate 2 is further provided with a first drive control chip 5 and a first drive layer flexible circuit board (FlexiblePrintedCircuit, FPC) 6 which are connected with the second electrode layer 22, and the first drive control chip 5 is connected with the first drive layer flexible circuit board 6.
The outer sealing frame 3 is an epoxy resin sealing frame, and the inner sealing frame 4 is a transparent sealing frame with viscosity.
The invention is different from other display elements in that a plurality of totally-enclosed spaces separated by the external sealing frame 3 and the internal sealing frame 4 are arranged in a liquid crystal screen, liquid crystal in the external enclosed space can enclose the liquid crystal in the internal enclosed space in a closed manner, and different liquid crystal materials are filled in different enclosed spaces to form different display areas and display different colors, so that the display modes and colors are diversified, and the market demand is met. The display areas are independent from each other, and any one of the display areas displays a planar state or a focal conic state under the action of an electric field.
The invention also provides a manufacturing method of the cholesteric liquid crystal electronic paper display device with regional display, which comprises the following steps:
Step S1: the method for manufacturing the glass substrate and the electrode layer comprises the following steps: cleaning and drying the substrate; coating photoresist on the surface of the substrate; heating and curing the substrate and the photoresist; exposing with a MASK alignment exposure Machine (MASK); developing by a developing solution; heating and hardening; etching with an etching solution; and stripping the photoresist remained after the development by the stripping liquid to form an Indium Tin Oxide (ITO) transparent electrode layer.
Step S2: coating an orientation film on the indium tin oxide transparent electrode layer, and adopting a spin coating method, namely coating Polyimide (PI) vertical orientation material on the surface of the cleaned indium tin oxide transparent electrode layer, pre-baking at 75 ℃ for 30 minutes after coating, and curing at 250 ℃ for 60 minutes, wherein the error range of the working temperature is +/-5 ℃ and the error range of the heating time is +/-1 minute; forming a PI vertical alignment film on the surface of the substrate with the ITO transparent electrode layer, wherein the thickness of the PI vertical alignment film is controlled to be about 400 angstroms, and the thickness error is allowed to be within +/-100 angstroms; the PI oriented material used KPI300B, the solids content of the diluent was adjusted to 4% with an error of 0.1% during coating.
Step S3: on the side surface of the second glass substrate 2 with the second electrode layer 22 and the second orientation film 21, or on the side surface of the first glass substrate 1 with the first electrode layer 17 and the first orientation film 18, an external sealing frame 3 is arranged in a screen printing mode, two internal sealing frames 4 are arranged in a roller coating or spin coating photoresist, exposure and development mode, and the two internal sealing frames 4 are transparent, so that the internal sealing frames are made of a photoresist material with viscosity, PSA030 manufactured by taiwanon materials company in china is selected, a photoetching viscosity diaphragm is formed in a spin coating mode, the film thickness is controlled by changing the rotation number and time of a spin coater, two internal sealing frames 4 without a common part are formed in a fixed place on the second orientation film 21 in an alignment exposure mode according to requirements, and the internal sealing frames are enclosed by the external sealing frames; the outer sealing frame 3 forms a sealing ring by using an epoxy resin glue according to a designed sealing ring positioning symbol and using a screen printing method, wherein the epoxy resin glue is FER-11, and the doping spacing material is a glass rod with the diameter of 3.3 mu m, and the content percentage of the glass rod is 1.2%. The mixture of the epoxy resin paste and the glass rod is stirred for more than 1 hour by using a stirrer, so that the spacer material is uniformly distributed in the epoxy resin paste. The mesh number of the silk screen material is 420 meshes, the material is stainless steel, the silk screen material is covered with a photosensitive film, and the thickness of the photosensitive film is 18 mu m. The outer sealing frames 3 and the two inner sealing frames 4 are closed, the edges of the outer sealing frames 3 and the two inner sealing frames 4 are not provided with openings, the outer sealing frames 3 and the two inner sealing frames 4 bond the first glass substrate 1 and the second glass substrate 2 together at a preset interval, and three closed spaces A, B, C are formed by the outer sealing frames 3 and the two inner sealing frames 4 and the first glass substrate 1 and the second glass substrate 2; the width of the outer sealing frame 3 is 0.3mm, and the width of the inner sealing frame 4 is 0.015mm.
Step S4: the process method of adopting the liquid crystal dropping process (OneDropFilling, ODF) is used for dropping cholesteric liquid crystals used for displaying different colors in the closed A, B, C closed spaces according to the requirement. Specifically, KGI-001C-450 was instilled in the closed space A, KGI-001 (20%) +KGI-001C-450 (80%), and KGI-001 (80%) +KGI-001C-450 (20%) was instilled in the closed space C. The cholesteric liquid crystal is a liquid crystal mixture liquid drop formed by a cholesteric liquid crystal material and a spacer, the liquid crystal mixture liquid drop is a mixture formed by chiral liquid crystal and nematic liquid crystal, the pitches of the chiral liquid crystal and the nematic liquid crystal are different, the added spacer balls are 3 mu m, and the mixture is required to be stirred for more than 1 hour by using a stirrer, so that the spacer material is uniformly distributed in the cholesteric liquid crystal. When the liquid crystal is dripped, the dripping amount of the liquid crystal needs to be fully considered to prevent the pollution of the liquid crystal and the frame glue penetration caused by the solidification of the liquid crystal and the frame glue in the adjacent area.
Step S5: compounding the first glass substrate 1 and the second glass substrate 2, aligning the first glass substrate 1 and the second glass substrate 2, and overlapping the first glass substrate 1 and the second glass substrate 2 under vacuum; the outer sealing frame 3 and the two inner sealing frames 4 bond the first glass substrate 1 and the second glass substrate 2 into a box shape by means of high-temperature hot pressing.
Step S6: the first drive control chip 5 and the first drive layer flexible circuit board 6 are crimped onto the second glass substrate 2.
Step S7: a black light absorbing layer is coated on the lower surface of the second glass substrate 2 by a screen printing method.
Compared with the prior art, the cholesteric liquid crystal electronic paper display device with regional display and the manufacturing method thereof realize display of at least two colors in the same cholesteric liquid crystal screen, and compared with multicolor display realized by screen printing, the cholesteric liquid crystal electronic paper display device with regional display reduces the process difficulty and saves the cost. And by adopting ODF (OneDropFilling) technology, the liquid crystal can be saved, the crystal filling time can be saved, and the method is not limited by a large-size screen.
The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions or improvements within the spirit of the present invention are intended to be covered by the claims of the present invention. Such as changing the type or number of the adhesive layers, the type of the electrophoretic layer, the thickness and type of the substrate, the type of the driving back plate, the bonding conditions of the layers, etc.
Claims (6)
1. A cholesteric liquid crystal electronic paper display device with regional display is characterized in that: the liquid crystal display device comprises a first glass substrate and a second glass substrate which are oppositely arranged, a first electrode layer is arranged on the side surface of the first glass substrate, which is opposite to the second glass substrate, a first orientation film which covers the first electrode layer, a second electrode layer is arranged on the side surface of the second glass substrate, which is opposite to the first glass substrate, a second orientation film which covers the second electrode layer, an outer sealing frame and an inner sealing frame which are positioned between the first glass substrate and the second glass substrate and connected with the first orientation film and the second orientation film, the outer sealing frame and the inner sealing frame are of a closed structure, the outer sealing frame and the outer sealing frame surround the inner sealing frame from the outside, a plurality of closed spaces are formed among the outer sealing frame, the inner sealing frame and the first glass substrate, the second glass substrate, different closed spaces are internally filled with cholesteric liquid crystals for displaying different colors, no common part is arranged between the outer sealing frame and the inner sealing frame, the number of the inner sealing frames is two, the inner sealing frames are respectively a first inner sealing frame and a second inner sealing frame, the inner sealing frame surrounds the first chip and the second sealing frame from the outer side, the inner sealing frame is connected with the second chip driving circuit, the inner sealing frame is connected with the first chip driving circuit and the inner sealing frame is also connected with the second chip, and the inner sealing frame is arranged between the inner sealing frame and the first chip driving circuit and the inner sealing layer.
2. The segmented display cholesteric liquid crystal electronic paper display device of claim 1, wherein: the first electrode layer and the second electrode layer are both indium tin oxide transparent electrode layers.
3. The segmented display cholesteric liquid crystal electronic paper display device of claim 1, wherein: the external sealing frame is an epoxy resin sealing frame, and the internal sealing frame is a transparent sealing frame with viscosity.
4. The segmented display cholesteric liquid crystal electronic paper display device of claim 1, wherein: the width of the outer sealing frame is 0.2-0.4mm, and the width of the inner sealing frame is 0.01-0.02mm.
5. A method of manufacturing a cholesteric liquid crystal electronic paper display device for area display as defined in any one of claims 1 to 4, characterized by: the method comprises the following steps:
step S1: manufacturing a glass substrate and an electrode layer;
Step S2: coating an orientation film on the electrode layer;
Step S3: an external sealing frame is arranged on the side surface of the second glass substrate with the second electrode layer and the second orientation film or on the side surface of the first glass substrate with the first electrode layer and the first orientation film in a screen printing mode, a plurality of internal sealing frames are arranged in a roller coating or spin coating adhesive photoresist, exposure and development mode, and corresponding closed spaces are formed between the external sealing frames and the internal sealing frames and between the adjacent internal sealing frames;
Step S4: dripping cholesteric liquid crystals for displaying different colors into the closed space by adopting a liquid crystal dripping process;
step S5: compounding the first glass substrate and the second glass substrate;
step S6: and crimping the first driving control chip and the first driving layer flexible circuit board onto the second glass substrate.
6. The method of manufacturing according to claim 5, wherein: further comprising step S7: and (3) coating a black light absorption layer on the lower surface of the second glass substrate by adopting a screen printing method.
Priority Applications (1)
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CN101034234A (en) * | 2006-03-07 | 2007-09-12 | 精工爱普生株式会社 | Liquid crystal device, method of making the same, and electronic apparatus |
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