CN108459440B - Double-layer display screen local superposition electronic paper device and manufacturing method thereof - Google Patents
Double-layer display screen local superposition electronic paper device and manufacturing method thereof Download PDFInfo
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- CN108459440B CN108459440B CN201810354888.7A CN201810354888A CN108459440B CN 108459440 B CN108459440 B CN 108459440B CN 201810354888 A CN201810354888 A CN 201810354888A CN 108459440 B CN108459440 B CN 108459440B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 67
- 238000001962 electrophoresis Methods 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 97
- 239000000758 substrate Substances 0.000 claims description 92
- 238000007789 sealing Methods 0.000 claims description 87
- 239000000565 sealant Substances 0.000 claims description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 239000002355 dual-layer Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 description 10
- 239000003292 glue Substances 0.000 description 10
- 229920000647 polyepoxide Polymers 0.000 description 10
- 229920001187 thermosetting polymer Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007788 liquid Substances 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
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- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—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
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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Abstract
The utility model provides a bilayer display screen local stack electronic paper device, includes upper cholesteric liquid crystal screen and lower floor's electrophoresis screen, is equipped with first sealed frame and second sealed frame between the first base plate and the second base plate of upper cholesteric liquid crystal screen, is equipped with cholesteric liquid crystal layer in the first sealed frame, is transparent in the second sealed frame. So with independent upper cholesteric liquid crystal screen and lower floor's electrophoresis screen organic combination together, both can keep the independence of demonstration, can overlap again and form local color display, reduced the size restriction of chip to the color screen, current chip can perfect support, has reduced the consumption and the cost is lower. The invention also provides a manufacturing method of the double-layer display screen local superposition electronic paper device.
Description
Technical Field
The invention relates to the technical field of electronic paper, in particular to a double-layer display screen local superposition electronic paper device 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.
In recent years, with the increasing visual pursuit of electronic display effect, research and application of color electronic paper are attracting more attention, and one color display scheme is that a cholesteric liquid crystal electronic paper screen and an electrophoretic electronic paper screen are overlapped in a double layer to form a color display. However, when the size of the display screen is larger, the existing chip is difficult to support double-layer stacked color display of a large screen, the display effect is poor, and meanwhile, due to the higher cost of cholesteric liquid crystal, the cost of the large-screen double-layer stacked color display product is higher, the selling price is higher, and the large-screen double-layer stacked color display product is difficult to popularize.
Disclosure of Invention
In view of the above, the present invention provides a dual-layer display local-superposition electronic paper device and a manufacturing method thereof, which can realize local color display by partially superposing dual-layer display screens, and can perfectly support the existing chip and has low cost, so as to solve the above problems.
The utility model provides a bilayer display screen local stack electronic paper device, includes upper cholesteric liquid crystal screen and lower floor's electrophoresis screen, upper cholesteric liquid crystal screen has first base plate, second base plate and interval set up in first sealed frame and the second sealed frame between first base plate and second base plate, first sealed frame is located the inside of second sealed frame, and two sides of first sealed frame and second sealed frame have public part, one side of first sealed frame is equipped with first opening, first sealed frame forms first sealed interval with first base plate and second base plate, outside first sealed frame and the region in second sealed frame forms second sealed interval with first base plate and second base plate, first sealed interval forms cholesteric liquid crystal layer through first opening pouring cholesteric liquid crystal, be transparent in the second sealed interval, the edge between upper cholesteric liquid crystal screen and the electrophoresis screen of lower floor is equipped with the sealant.
Further, the upper cholesteric liquid crystal screen sequentially comprises a first substrate, a first electrode layer, a first alignment film, a second electrode layer and a second substrate from top to bottom, wherein the first electrode layer is formed on the side surface of the first substrate facing the second substrate, and the first electrode layer is covered by the first alignment film; the second electrode layer is formed on a side of the second substrate facing the first substrate, and the second alignment film covers the second electrode layer.
Further, the thickness of the first substrate and the second substrate is 0.15-1.1mm.
Further, the lower layer electrophoresis screen sequentially comprises a third substrate, an electrophoresis layer and a driving backboard from top to bottom, a common electrode is attached to the bottom surface of the third substrate, and the area of the electrophoresis layer is larger than that of the cholesteric liquid crystal layer.
Further, a second driving control chip and a second driving layer flexible board connected with the second driving control chip are further arranged on the driving backboard.
Further, the electronic paper testing device further comprises a double-layer stacked electronic paper testing system board, a first driving control chip and a first driving layer flexible board connected with the first driving control chip are further arranged on the second substrate, a second driving control chip and a second driving layer flexible board connected with the second driving control chip are further arranged on the driving backboard, and the double-layer stacked electronic paper testing system board is connected with the first driving layer flexible board and the second driving layer flexible board.
Further, a second opening is formed in the portion, which is not overlapped with the first sealing frame, of the second sealing frame, and transparent TN type liquid crystal is poured into the second sealing section through the second opening.
Further, the second enclosed space is internally provided with a transparent substrate, a transparent electrode or transparent sealant.
A manufacturing method of a double-layer display screen local superposition electronic paper device comprises the following steps:
Step S1: the manufacturing method comprises the steps of manufacturing an upper-layer cholesteric liquid crystal screen, wherein the upper-layer cholesteric liquid crystal screen is provided with a first substrate, a second substrate, a first sealing frame and a second sealing frame, the first sealing frame and the second sealing frame are arranged between the first substrate and the second substrate at intervals, the first sealing frame is positioned in the second sealing frame, two side edges of the first sealing frame and the second sealing frame are provided with public parts, one side of the first sealing frame is provided with a first opening, the first sealing frame, the first substrate and the second substrate form a first sealing interval, a second sealing interval is formed between the first sealing frame and the second substrate and the first substrate, the first sealing interval is filled with cholesteric liquid crystal through the first opening, and the second sealing interval is transparent;
Step S2: manufacturing a lower layer electrophoresis screen;
step S3: attaching the upper cholesteric liquid crystal screen to the lower electrophoretic screen under the high power microscope;
Step S4: dispensing sealant at the peripheral edges between the upper cholesteric liquid crystal screen and the lower electrophoretic screen;
Step S5: placing the upper cholesteric liquid crystal screen and the lower electrophoretic screen which are mutually attached into a high-pressure bin together for defoaming and drying treatment;
Step S6: and (5) cooling.
Further, a second opening is formed in one side of the second sealing frame, and transparent TN type liquid crystal is poured into the second sealing section through the second opening.
Further, the second enclosed space is internally provided with a transparent substrate, a transparent electrode or transparent sealant.
Compared with the prior art, the double-layer display screen local superposition electronic paper device comprises an upper cholesteric liquid crystal screen and a lower electrophoretic screen, a first sealing frame and a second sealing frame are arranged between a first substrate and a second substrate of the upper cholesteric liquid crystal screen, a cholesteric liquid crystal layer is arranged in the first sealing frame, and the second sealing frame is transparent. So with independent upper cholesteric liquid crystal screen and lower floor's electrophoresis screen organic combination together, both can keep the independence of demonstration, can overlap again and form local color display, reduced the size restriction of chip to the color screen, current chip can perfect support, has reduced the consumption and the cost is lower. The invention also provides a manufacturing method of the double-layer display screen local superposition electronic paper device.
Drawings
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
Fig. 1 is a schematic cross-sectional view of a dual-layer display device partially overlapped with an electronic paper device according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic top view of a dual-layer display partially overlapped electronic paper device according to an embodiment of the present invention.
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, a dual-layer display local-superposition electronic paper device provided by the invention includes an upper layer cholesteric liquid crystal screen 100 and a lower layer electrophoretic screen 200.
Referring to fig. 2, the upper cholesteric liquid crystal panel 100 includes, in order from top to bottom, a first substrate 1, a first electrode layer 17, a first alignment film 18, a second alignment film 21, a second electrode layer 22, and a second substrate 2.
The first electrode layer 17 is formed on the side of the first substrate 1 facing the second substrate 2, and the first alignment film 18 covers the first electrode layer 17.
The second electrode layer 22 is formed on the side of the second substrate 2 facing the first substrate 1, and the second alignment film 21 covers the second electrode layer 22.
The first substrate 1 and the second substrate 2 are both glass substrates.
A first seal frame 11 and a second seal frame 12 are provided between the first alignment film 18 and the second alignment film 21, that is, between the first substrate 1 and the second substrate 2 at intervals. The first sealing frame 11 and the second sealing frame 12 are made of epoxy resin glue, and are used for bonding the first substrate 1 and the second substrate 2, that is, directly bonding the two layers of the orientation films in between.
The second substrate 2 is further provided with a first driving control chip 3 and a first driving layer flexible board (Flexible Printed Circuit, FPC) 4.
The lower layer electrophoretic screen 200 comprises a third substrate 5, an electrophoretic layer 6 and a driving backboard 7 from top to bottom.
The bottom surface of the third substrate 5 is attached with a common electrode.
The driving backboard 7 is also provided with a second driving control chip 8, the second driving control chip 8 is connected with a second driving layer flexible board 9, and the double-layer stacked electronic paper testing system board 11 is connected with the first driving layer flexible board 4 and the second driving layer flexible board 9.
In this embodiment, the size of the upper cholesteric liquid crystal panel 100 is smaller than the size of the lower electrophoretic panel 200, and the length and width of the upper cholesteric liquid crystal panel 100 are smaller than the length and width of the lower electrophoretic panel 200 by 1mm, respectively. A sealant 10 is provided at the edge between the upper cholesteric liquid crystal panel 100 and the lower electrophoretic panel 200. When the display is installed, the upper cholesteric liquid crystal screen 100 is attached to the lower electrophoretic screen 200 under the high power microscope, and is sealed by the sealant 10 at the edge. The sealant 10 is epoxy resin glue, the water absorption rate is less than 0.5%, the water vapor permeability is less than 4 g/(m2.24h), the water vapor permeability test condition is 60 ℃/90% RH, and the sample thickness is 1mm. After the upper cholesteric liquid crystal screen 100 is attached to the lower electrophoretic screen 200, the upper cholesteric liquid crystal screen enters a high-pressure bin to be defoamed and dried.
Referring to fig. 3, the first sealing frame 11 is located inside the second sealing frame 12, and two sides of the first sealing frame 11 and the second sealing frame 12 have a common portion, one side of the first sealing frame 11 is provided with a first opening 13, and a portion of the second sealing frame 12, which is not overlapped with the first sealing frame 11, is provided with a second opening 14. The first sealing frame 11 forms a first sealed section 15 with the first substrate 1 and the second substrate 2, and a second sealed section 16 is formed with the first substrate 1 and the second substrate 2 in a region outside the first sealing frame 11 and inside the second sealing frame 12. The first closed region 15 is filled with cholesteric liquid crystal through the first opening 13 to form a cholesteric liquid crystal layer; the second enclosed space 16 is transparent, such as a transparent substrate, a transparent electrode or a transparent sealant filled with a liquid crystal of a normal transparent TN type through the second opening 14, or not filled with a liquid crystal. When the second sealing region 16 is a transparent substrate, a transparent electrode, or a transparent sealant, the second opening 14 may not be provided on one side of the second sealing frame 12. The first seal frame 11 and the second seal frame 12 thus form a double ring seal frame.
In this embodiment, the transparent substrate is formed by etching a nano Indium Tin Oxide (ITO) in the second enclosed region 16, or a nano Indium tin oxide with a small sheet resistance is selected as the transparent electrode.
The first opening 13 and the second opening 14 are both positioned on the same side of the second substrate 2, so that the operation of filling liquid crystal is facilitated.
Thus, the area of the electrophoretic layer 6 of the lower electrophoretic screen 200 is much larger than the area of the cholesteric liquid crystal layer of the upper cholesteric liquid crystal screen 100. The upper cholesteric liquid crystal panel 100 is transparent at the portion overlapping the electrophoretic layer 6 outside the cholesteric liquid crystal layer.
The first side 111 and the second side 112 of the first sealing frame 11 in the region outside the cholesteric liquid crystal layer and in the partial region overlapping with the electrophoretic layer 6 are transparent thermosetting epoxy resin glue with the width of 0.1mm, the transparent thermosetting epoxy resin glue is doped with a spacing material, and the first side 111 and the second side 112 are silk-screened on the first substrate 1; the other parts of the first sealing frame 11 and the second sealing frame 12 are white thermosetting epoxy resin glue which is silk-screened on the second substrate 2, the width of the white thermosetting epoxy resin glue is 0.35mm, and a spacing material is doped in the white thermosetting epoxy resin glue. Wherein the spacer material is a glass rod with a diameter of 3.3 mu m, the weight percentage of the glass rod in the transparent thermosetting epoxy resin glue or in the white thermosetting epoxy resin glue is 1.2 percent, and the spacer material is uniformly distributed in the transparent or white epoxy resin glue by stirring for more than 1 hour through a stirrer.
The display sizes of the upper cholesteric liquid crystal screen 100 and the lower electrophoretic screen 200 are 4.2 inches, the thicknesses of the first substrate 1 and the second substrate 2 are 0.15-1.1mm, such as 0.55mm, the width of the first opening 13 is 3mm, the width of the second opening 14 is 5mm, and the thicknesses of the first enclosed region 15 and the second enclosed region 16 are 3.3 μm, namely, the thickness of the cholesteric liquid crystal layer.
The cholesteric liquid crystal is a mixture composed of chiral liquid crystal and nematic liquid crystal, and the model is as follows: MDA-00-1444 (23% by weight) and MDA-00-1445 (77% by weight), the pitches of the chiral liquid crystal and the nematic liquid crystal being different.
The upper cholesteric liquid crystal screen 100 can also adopt an electric control structural unit with a reflecting function or absorbing primary color light, and the display mode of the transparent electronic paper after power-on is an electrowetting mode, a transverse electrophoresis technology mode or an electrochromic mode; the lower electrophoretic screen 200 may also be an electronic paper with a type capable of implementing black-white red and gray scale switching.
The invention also provides a manufacturing method of the double-layer display screen local superposition electronic paper device, which comprises the following steps:
Step S1: manufacturing an upper cholesteric liquid crystal screen 100, wherein the upper cholesteric liquid crystal screen 100 sequentially comprises a first substrate 1, a first electrode layer 17, a first orientation film 18, a second orientation film 21, a second electrode layer 22 and a second substrate 2 from top to bottom, a first sealing frame 11 and a second sealing frame 12 are arranged between the first orientation film 18 and the second orientation film 21, namely between the first substrate 1 and the second substrate 2 at intervals, the first sealing frame 11 is positioned in the second sealing frame 12, two sides of the first sealing frame 11 and the second sealing frame 12 are provided with a common part, one side of the first sealing frame 11 is provided with a first opening 13, the first sealing frame 11 forms a first sealing interval 15 with the first substrate 1 and the second substrate 2, a second sealing interval 16 is formed between the first substrate 1 and the second substrate 2 and at an area outside the first sealing frame 11 and in the second sealing frame 12, the first sealing interval 15 is filled with cholesteric liquid crystal through the first opening 13 to form a cholesteric liquid crystal layer, and the second sealing interval 16 is transparent;
Step S2: manufacturing a lower layer electrophoresis screen 200, comprising a third substrate 5, an electrophoresis layer 6 and a driving backboard 7 from top to bottom in sequence, wherein a common electrode is attached to the bottom surface of the third substrate 5, and the area of the electrophoresis layer 6 is far larger than that of the cholesteric liquid crystal layer;
step S3: attaching the upper cholesteric liquid crystal screen 100 to the lower electrophoretic screen 200 under the high power microscope;
Step S4: and a sealant 10 is dispensed at the peripheral edge between the upper cholesteric liquid crystal panel 100 and the lower electrophoretic panel 200.
Step S5: placing the upper cholesteric liquid crystal screen 100 and the lower electrophoretic screen 200 which are mutually attached into a high-pressure bin together for defoaming and drying treatment;
Step S6: and (5) cooling.
Compared with the prior art, the double-layer display screen local superposition electronic paper device comprises an upper layer cholesteric liquid crystal screen 100 and a lower layer electrophoresis screen 200, a first sealing frame 11 and a second sealing frame 12 are arranged between a first substrate 1 and a second substrate 2 of the upper layer cholesteric liquid crystal screen 100, a cholesteric liquid crystal layer is arranged in the first sealing frame 11, and the second sealing frame 12 is transparent. So with independent upper cholesteric liquid crystal screen 100 and lower floor's electrophoresis screen 200 organic combination together, both can keep the independence of demonstration, can overlap again and form local color display, reduced the size restriction of chip to the color screen, current chip can perfect support, reduced the consumption and the cost is lower. The invention also provides a manufacturing method of the double-layer display screen local superposition electronic paper device.
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 (3)
1. The utility model provides a bilayer display screen local stack electronic paper device which characterized in that: the double-layer display screen local superposition electronic paper device comprises an upper layer cholesteric liquid crystal screen and a lower layer electrophoresis screen, wherein the upper layer cholesteric liquid crystal screen is provided with a first substrate, a second substrate, a first sealing frame and a second sealing frame which are arranged between the first substrate and the second substrate at intervals, the upper layer cholesteric liquid crystal screen sequentially comprises a first substrate, a first electrode layer, a first orientation film, a second electrode layer and a second substrate from top to bottom, the first electrode layer is formed on the side surface of the first substrate facing the second substrate, and the first orientation film covers the first electrode layer; the second electrode layer is formed on the side surface of the second substrate facing the first substrate, the second electrode layer is covered by the second orientation film, the first sealing frame is positioned in the second sealing frame, two sides of the first sealing frame and the second sealing frame are provided with public parts, one side of the first sealing frame is provided with a first opening, the first sealing frame, the first substrate and the second substrate form a first sealed interval, a second sealed interval is formed by the area outside the first sealing frame and in the second sealing frame, the first sealed interval is filled with cholesteric liquid crystal through the first opening to form a cholesteric liquid crystal layer, the second sealed interval is transparent, the edge between the upper cholesteric liquid crystal screen and the lower electrophoretic screen is provided with sealant, the lower electrophoretic screen sequentially comprises a third substrate and an electrophoretic layer from top to bottom, the electrophoresis device comprises a third substrate, a second substrate, a first driving control chip, a first driving layer flexible board, a second driving control chip and a second driving layer flexible board, wherein the bottom surface of the third substrate is provided with a public electrode, the area of the electrophoresis layer is larger than that of a cholesteric liquid crystal layer, the second substrate is also provided with the first driving control chip and the first driving layer flexible board connected with the first driving control chip, the driving back board is also provided with the second driving control chip and the second driving layer flexible board connected with the second driving control chip, the double-layer stacked electronic paper testing system board is connected with the first driving layer flexible board and the second driving layer flexible board, a second opening is formed in the part, which is not overlapped with the first sealing frame, of the second sealing frame is filled with transparent TN type liquid crystal through the second opening, and the second sealing frame is internally provided with a transparent substrate, a transparent electrode or transparent sealant.
2. The dual-layer display screen partial overlay electronic paper device of claim 1, wherein: the thickness of the first substrate and the second substrate is 0.15-1.1mm.
3. A method for manufacturing the double-layer display screen local-superposition electronic paper device according to any one of claims 1 to 2, comprising the following steps:
Step S1: the manufacturing method comprises the steps of manufacturing an upper-layer cholesteric liquid crystal screen, wherein the upper-layer cholesteric liquid crystal screen is provided with a first substrate, a second substrate, a first sealing frame and a second sealing frame, the first sealing frame and the second sealing frame are arranged between the first substrate and the second substrate at intervals, the first sealing frame is positioned in the second sealing frame, two side edges of the first sealing frame and the second sealing frame are provided with public parts, one side of the first sealing frame is provided with a first opening, the first sealing frame, the first substrate and the second substrate form a first sealing interval, a second sealing interval is formed between the first sealing frame and the second substrate and the first substrate, the first sealing interval is filled with cholesteric liquid crystal through the first opening, and the second sealing interval is transparent;
Step S2: manufacturing a lower layer electrophoresis screen;
step S3: attaching the upper cholesteric liquid crystal screen to the lower electrophoretic screen under the high power microscope;
Step S4: dispensing sealant at the peripheral edges between the upper cholesteric liquid crystal screen and the lower electrophoretic screen;
Step S5: placing the upper cholesteric liquid crystal screen and the lower electrophoretic screen which are mutually attached into a high-pressure bin together for defoaming and drying treatment;
Step S6: and (5) cooling.
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