CN109116657A - A kind of color electric paper display module and preparation method thereof - Google Patents
A kind of color electric paper display module and preparation method thereof Download PDFInfo
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- CN109116657A CN109116657A CN201811252526.3A CN201811252526A CN109116657A CN 109116657 A CN109116657 A CN 109116657A CN 201811252526 A CN201811252526 A CN 201811252526A CN 109116657 A CN109116657 A CN 109116657A
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- 238000002360 preparation method Methods 0.000 title abstract description 3
- 230000003287 optical effect Effects 0.000 claims abstract description 54
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 238000009792 diffusion process Methods 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims description 49
- 239000011241 protective layer Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000003292 glue Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 7
- 239000012945 sealing adhesive Substances 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000007641 inkjet printing Methods 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000012769 display material Substances 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 229940017517 flexall Drugs 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The present invention discloses a kind of color electric paper display module and preparation method thereof, including is adhered to above array substrate and has electrophoretic display layer, and the preceding optical assembly that point/linear light source is converted to high brightness and the area source with uniform brilliance is additionally provided with above the electrophoretic display layer；The preceding optical assembly includes light guide plate, and light guide plate is equipped with the colour light filtering structure of diffusion point and RGBW；The colour light filtering structure of diffusion point and RGBW are located on the same floor, and are integrated in the lower surface of light guide plate；Or diffusion point and the colour light filtering structure of RGBW are located at different layers, are respectively arranged at the lower surface and upper surface of light guide plate.Light guide plate of the present invention and optical filter, which are combined into one, enormously simplifies structure, and colored filter is integrated on light guide plate, is avoided multilayer and is pasted, and thickness thinning, weight is lighter, and color is more bright-coloured.
Description
Technical field
The present invention relates to color electric paper technical field, specially a kind of color electric paper display module and its production side
Method.
Background technique
Electronic Paper is a kind of novel display material based on principle of electrophoresis, can accomplish not hurt eye as plain paper,
And have the characteristics that super low energy consumption, thin as a piece of paper, flexible and similar to books clarity, display effect and true paper book
Nationality is similar.Electronics paper product on the market is substantially black and white at present, and there is also production technologies to answer for color electric paper product
Miscellaneous, many deficiencies such as yields is low.
As member too scientific and technological published patent " color electronic paper and its manufacturing method (application number:
201110430449.8) it is recorded in ": depositing the resistance of RGB three coloured light in Electronic Paper, to avoid three coloured light resistance from fading, pasted on it
Color protection layer is covered, then pastes layer of transparent adhesive-layer and adds one layer of outside plate；One layer of color protection layer is provided for color light resistance layer, is prevented by transparent viscous
Glue-line, which corrodes, generates coloration transformation.As the published patent of Shanghai heavenly steed microelectronics " a kind of color electronic paper device (application number:
201110446871.2) recorded in ": being made in Electronic Paper and cover film for two layers, one layer covers on substrate, one layer cover in
On color membrane substrates；Eliminate the protective layer of Electronic Paper, it is directly that color membrane substrates are adhered together with electronic paper body, when angle compared with
It is not in color difference phenomenon when big.
But above scheme it is common the problem is that: the colored filter of sheet material will also individually add adhesive-layer, add
Preceding optical assembly necessary to display module, entire product thickness is excessively high, and process is more.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide one kind can optimize color electronic paper, display is reduced
The general thickness of module, weight is lighter, and color is more bright-coloured, the simpler color electric paper display module of manufacture craft and its production
Method.Technical solution is as follows:
A kind of color electric paper display module, including be adhered to above array substrate and have electrophoretic display layer, the electrophoretic display layer
Top is additionally provided with the preceding optical assembly that point/linear light source is converted to high brightness and the area source with uniform brilliance；The preceding light group
Part includes light guide plate, and light guide plate is equipped with the colour light filtering structure of diffusion point and RGBW；The colorized optical filtering knot of diffusion point and RGBW
Structure is located on the same floor, and is integrated in the lower surface of light guide plate；Or diffusion point and the colour light filtering structure of RGBW are located at different layers,
It is respectively arranged at the lower surface and upper surface of light guide plate.
It further, further include waterproof protective layer, waterproof protective layer is located at the top of the preceding optical assembly, outer and battle array
It is equipped with edge sealing adhesive between column substrate, constitutes sealing structure.
Further, further include waterproof protective layer, waterproof protective layer be located at the preceding optical assembly and electrophoretic display layer it
Between, it is mutually bonded with preceding optical assembly by Optical transparent adhesive, and in electrophoretic display layer is sealed in.
Further, four sub-pixels in the colour light filtering structure of the RGBW drive with the array of array substrate
Unit corresponds.
Further, the preceding optical assembly further includes the LED light source that light guide plate outer rim is arranged in, and LED light source is covered with
The reflector of arc, is additionally provided with diffusion sheet between LED light source and light-guide edge.
Further, the material of the light guide plate is the acrylic board of flexible and transparent, soft board or hardboard.
Further, the material of the light guide plate is PET, PEN, PC or TAC.
A kind of production method of color electric paper display module, comprising the following steps:
Step 1: driving unit is arranged in array substrate in array manner；
Step 2: electrophoretic display layer is adhered directly to above array substrate；
Step 3: the array pattern of R, G, B, W being arranged on the acrylic board surface of flexible and transparent by yellow light process, then same
Diffusion point is set in such a way that laser array is got ready on face or different sides, completes the production of light guide plate；；
Step 4: light source assembly is installed to the production of optical assembly before completing on light guide plate；
Step 5: the contraposition of preceding optical assembly being covered on electrophoretic display layer, makes tetra- sub-pixels of its R, G, B, W and array substrate
Array driving unit correspond；
Step 6: before waterproof protective layer is attached directly to by way of idler wheel hot pressing on optical assembly, and with frame glue around
Form coat a circle edge sealing glue, with play the role of seal anti-steam infiltration.
Further, the step 3 is replaced with, the array pattern of R, G, B, W is set by inkjet printing, then pass through carving
It carves or point is spread in the setting of ink mode of printing, to complete the production of light guide plate.
Further, the step 5 and 6 are replaced with, waterproof protective layer is directly viscous by way of idler wheel hot pressing
It invests on electrophoretic display layer, electrophoretic display layer is sealed；The contraposition of preceding optical assembly is covered on by Optical transparent adhesive again anti-
Outside water conservation layer, and correspond tetra- sub-pixels of its R, G, B, W with the array driving unit of array substrate.
The beneficial effects of the present invention are: light guide plate of the present invention and optical filter are combined into one and enormously simplify structure, thickness is thinned
Degree, keeps color more bright-coloured, convenient for making thinner, the lighter color e-book finished product of weight；Electronic Paper and protective layer are equal
Included adhesion layer, therefore can directly paste, eliminate individual transparent adhesive-layer；Since colored filter is integrated on light guide plate,
Multilayer is avoided to paste.
Detailed description of the invention
Fig. 1 is common light guide plate dot matrix arrangement schematic diagram.
Fig. 2 is band CF light guide plate dot matrix arrangement schematic diagram.
Fig. 3 is the preceding optical assembly structure chart of filter layer and diffusion point in same layer.
Fig. 4 is the preceding optical assembly structure chart of filter layer and diffusion point in different layers.
Fig. 5 is the display module structural schematic diagram of protective layer outside.
Fig. 6 is the display module structural schematic diagram of preceding optical assembly outside.
In figure: 1- array substrate；2- electrophoretic display layer；Optical assembly before 3-；31- light guide plate；32- spreads point；33-RGBW's
Colour light filtering structure；34- diffusion sheet；35-LED light source；36- reflector；4- waterproof protective layer；5- edge sealing adhesive；6-COF IC drives
It is dynamic；7- Optical transparent adhesive；8- bonding fixes glue.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.Since Electronic Paper itself is not sent out
Light, therefore optical assembly before increasing in module, so that display module reaches the round-the-clock requirement used.But due to previous filter layer
Using the mode pasted after being fabricated separately, lead to that structure is complicated, general thickness is thicker；Preceding optical assembly of the invention includes light source group
Part is formed with the light guide plate with colorized optical filtering function.Made in a manner of yellow light process on the diaphragm of acrylic material RGB and
The filtering structure of transparent four color, then be arranged in such a way that laser array is got ready and spread the production that point completes light guide plate；It is common guide-lighting
The array of plate spreads point diagram, as shown in Figure 1；Light guide plate of the present invention with filtering functions is as shown in Figure 2.
The color electric paper display module of the present embodiment, including be adhered to above array substrate 1 and have electrophoretic display layer 2, institute
State the preceding light group for being additionally provided with above electrophoretic display layer 2 and point/linear light source being converted to high brightness and the area source with uniform brilliance
Part 3；The preceding optical assembly 3 includes light guide plate 31, and light guide plate 31 is equipped with diffusion point 32 and the colour light filtering structure 33 of RGBW；Such as
Shown in Fig. 3, the colour light filtering structure 33 of diffusion point 32 and RGBW are located on the same floor, and are integrated in the lower surface of light guide plate 31；Such as
Shown in Fig. 4, or diffusion point 32 and the colour light filtering structure 33 of RGBW are located at different layers, are integrated in the following table of light guide plate 31 respectively
Face and upper surface.The production method of filtering structure is preferably yellow light process, can also use inkjet printing mode；Spread the system of point
It is preferably that laser array is got ready as mode, it can also be using engraving and ink mode of printing.
Light guide plate of the preceding optical assembly by light source assembly and with filtering functions forms.Its major function is to lead to point/linear light source
It crosses light guide structure and is converted to high brightness and the area source with uniform brilliance.Contraposition is covered on electricity after preceding optical assembly group is stood
It swims on display layer, corresponds transparent four sub-pixels of its R, G, B, W with the array driving unit of substrate.The material of light guide plate
Material is preferably the acrylic board of flexible and transparent, and rigid-flex all may be used；It is alternatively the PET/PEN/PC/TAC etc. with identical light transmittance
Material.
Wherein, preceding optical assembly 3 further includes the LED light source 35 that 31 outer rim of light guide plate is arranged in, and LED light source 35 is covered with arc
Reflector 36, LED light source 35 and light guide plate are additionally provided with diffusion sheet 34 between 31 edge.
It further include waterproof protective layer 4, as shown in figure 5, waterproof protective layer 4 is located at the top of the preceding optical assembly 3, outer
It is equipped with edge sealing adhesive 5 between array substrate 1, constitutes sealing structure.This protective layer is made of waterproof layer and edge sealing adhesive, has waterproof
The function of vapour, antiultraviolet；Before the mode of idler wheel hot pressing can be used to be attached directly on optical assembly, and with frame glue around
Form coats a circle edge sealing glue, plays the role of sealing anti-steam infiltration jointly.
Another embodiment as shown in fig. 6, waterproof protective layer 4 between the preceding optical assembly 3 and electrophoretic display layer 2,
It is mutually bonded with preceding optical assembly 3 by Optical transparent adhesive 7, and in electrophoretic display layer 2 is sealed in.This protective layer main function is
Electronic Paper is protected, prevents steam from entering influence electrophoretic effect；Preceding optical assembly need to use the optical filtering of not fugitive color technique production guide-lighting
Plate is fitted on waterproof membrane by Optical transparent adhesive.
Specific production step is as follows:
Step 1: driving unit is arranged in array substrate 1 in array manner；
Step 2: electrophoretic display layer 2 is adhered directly to 1 top of array substrate；
Step 3: the array of figure of R, G, B, W are arranged on the acrylic board surface of flexible and transparent by yellow light process or inkjet printing
Case, then on the same face or different sides in such a way that laser array is got ready, or engraving or ink printing setting diffusion point 32,
Complete the production of light guide plate 31；
Step 4: light source assembly is installed to the production of optical assembly 3 before completing on light guide plate 31；
Step 5: by preceding optical assembly 3 contraposition be covered on electrophoretic display layer 2, make tetra- sub-pixels of its R, G, B, W with array base
The array driving unit of plate 1 corresponds；
Step 6: before waterproof protective layer 4 is attached directly to by way of idler wheel hot pressing on optical assembly 3, and with frame around
The form of glue coats a circle edge sealing glue 5, to play the role of sealing anti-steam infiltration.
Wherein, step 5 and 6 also could alternatively be, and waterproof protective layer 4 is attached directly to electricity by way of idler wheel hot pressing
It swims on display layer 2, electrophoretic display layer 2 is sealed；The contraposition of preceding optical assembly 3 is covered on by waterproof by Optical transparent adhesive 7 again
Outside protective layer 4, and correspond tetra- sub-pixels of its R, G, B, W with the array driving unit of array substrate 1.
Claims (10)
1. a kind of color electric paper display module, including it is adhered to above array substrate (1) and has electrophoretic display layer (2), feature
It is, is additionally provided with above the electrophoretic display layer (2) and point/linear light source is converted to high brightness and with the area source of uniform brilliance
Preceding optical assembly (3)；The preceding optical assembly (3) includes light guide plate (31), and light guide plate (31) is equipped with diffusion point (32) and RGBW
Colour light filtering structure (33)；The colour light filtering structure (33) of diffusion point (32) and RGBW are located on the same floor, and are integrated in leaded light
The lower surface of plate (31)；Or diffusion point (32) and the colour light filtering structure (33) of RGBW are located at different layers, are respectively arranged at and lead
The lower surface and upper surface of tabula rasa (31).
2. color electric paper display module according to claim 1, which is characterized in that further include waterproof protective layer (4), prevent
Water conservation layer (4) is located at the top of the preceding optical assembly (3), is equipped with edge sealing adhesive (5) between outer and array substrate (1), constitutes
Sealing structure.
3. color electric paper display module according to claim 1, which is characterized in that further include waterproof protective layer (4), prevent
Water conservation layer (4) passes through optical clear with preceding optical assembly (3) between the preceding optical assembly (3) and electrophoretic display layer (2)
Glue (7) mutually bonds, and in electrophoretic display layer (2) is sealed in.
4. color electric paper display module according to claim 1, which is characterized in that the colour light filtering structure of the RGBW
(33) four sub-pixels in are corresponded with the array driving unit of array substrate (1).
5. color electric paper display module according to claim 1, which is characterized in that the preceding optical assembly (3) further includes
LED light source (35) in light guide plate (31) outer rim is set, and LED light source (35) is covered with the reflector (36) of arc, LED light source
(35) diffusion sheet (34) are additionally provided between light guide plate (31) edge.
6. color electric paper display module according to claim 1, which is characterized in that the material of the light guide plate (31) is
The acrylic board of flexible and transparent, soft board or hardboard.
7. color electric paper display module according to claim 1, which is characterized in that the material of the light guide plate (31) is
PET, PEN, PC or TAC.
8. a kind of production method of color electric paper display module as described in claim 1, which is characterized in that including following step
It is rapid:
Step 1: driving unit is arranged on array substrate (1) in array manner；
Step 2: electrophoretic display layer (2) is adhered directly to above array substrate (1)；
Step 3: the array pattern of R, G, B, W being arranged on the acrylic board surface of flexible and transparent by yellow light process, then same
Diffusion point (32) is set in such a way that laser array is got ready on face or different sides, completes the production of light guide plate (31)；
Step 4: light source assembly is installed to the production of optical assembly (3) before completing on light guide plate (31)；
Step 5: by preceding optical assembly (3) contraposition be covered on electrophoretic display layer (2), make tetra- sub-pixels of its R, G, B, W with battle array
The array driving unit of column substrate (1) corresponds；
Step 6: waterproof protective layer (4) is attached directly on preceding optical assembly (3) by way of idler wheel hot pressing, and around
A circle edge sealing glue (5) is coated, in the form of frame glue to play the role of sealing anti-steam infiltration.
9. production method according to claim 8, which is characterized in that replace with the step 3, set by inkjet printing
The array pattern of R, G, B, W are set, then by engraving or ink mode of printing setting diffusion point (32), to complete light guide plate (31)
Production.
10. production method according to claim 8, which is characterized in that replace with the step 5 and 6, by waterproofing protection
Layer (4) is attached directly on electrophoretic display layer (2) by way of idler wheel hot pressing, and electrophoretic display layer (2) is sealed；Lead to again
It crosses Optical transparent adhesive (7) and preceding optical assembly (3) contraposition is covered on waterproof protective layer (4) outside, and make tetra- sub-pixels of its R, G, B, W
Corresponded with the array driving unit of array substrate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811252526.3A CN109116657A (en) | 2018-10-25 | 2018-10-25 | A kind of color electric paper display module and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811252526.3A CN109116657A (en) | 2018-10-25 | 2018-10-25 | A kind of color electric paper display module and preparation method thereof |
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| CN109116657A true CN109116657A (en) | 2019-01-01 |
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ID=64855271
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811252526.3A Pending CN109116657A (en) | 2018-10-25 | 2018-10-25 | A kind of color electric paper display module and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110262154A (en) * | 2019-07-22 | 2019-09-20 | 成都捷翼电子科技有限公司 | A kind of structure and manufacturing method of color display module |
| CN110515253A (en) * | 2019-09-18 | 2019-11-29 | 成都捷翼电子科技有限公司 | A kind of superstructure and preparation method thereof of color electric ink display screen |
| CN110568691A (en) * | 2019-09-27 | 2019-12-13 | 成都捷翼电子科技有限公司 | Color electronic ink display screen structure and manufacturing method thereof |
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