CN111487761A - Electrowetting display panel and manufacturing method thereof - Google Patents
Electrowetting display panel and manufacturing method thereof Download PDFInfo
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- CN111487761A CN111487761A CN202010407042.2A CN202010407042A CN111487761A CN 111487761 A CN111487761 A CN 111487761A CN 202010407042 A CN202010407042 A CN 202010407042A CN 111487761 A CN111487761 A CN 111487761A
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- display panel
- electrowetting display
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 82
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 9
- 239000000565 sealant Substances 0.000 claims description 3
- 229920002120 photoresistant polymer Polymers 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
- G02B26/005—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid based on electrowetting
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention provides an electrowetting display panel and a manufacturing method thereof, wherein the electrowetting display panel comprises a driving layer, a plurality of switching elements and a plurality of driving electrodes, wherein the driving layer comprises a plurality of switching elements; the first electrode layer is arranged on the driving layer; the first electrode layer includes a plurality of electrode portions; the second electrode layer is arranged on one side, close to the first electrode layer, of the second flexible substrate; the latticed insulating retaining wall is arranged between the hydrophobic insulating layer and the second electrode layer; the latticed insulating retaining wall is provided with a plurality of opening areas; a plurality of display units, the display units comprising at least three display subunits, the display subunits located within the open area, the display subunits comprising a non-polar liquid and a polar liquid; the display unit corresponds to the switch element, and the display unit corresponds to the electrode portion. The electrowetting display panel and the manufacturing method thereof can simplify the process and reduce the manufacturing precision.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an electrowetting display panel and a manufacturing method thereof.
[ background of the invention ]
Electronic paper mostly adopts electronic ink (E ink) at present, but the electronic ink is limited by the color forming principle of black and white particles coated in microcapsules, and the response speed is slow, so that the full-color realization difficulty is higher. An advantage of electrowetting display panels is a fast response speed compared to electronic ink.
However, in the current electrowetting display panel, three primary color electrowetting display layers of cyan, magenta and yellow are stacked according to the reflection characteristic of electrowetting on color light, and the primary color light is reflected respectively to realize color display according to the principle of a color reduction method, however, in this way, three layers of colors must be assembled and driven respectively, and three layers of display must be aligned accurately, the process is complicated, and the requirement for precision is high.
Therefore, it is desirable to provide an electrowetting display panel and a method for manufacturing the same to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide an electrowetting display panel and a manufacturing method thereof, which can simplify the process and reduce the manufacturing precision.
To solve the above technical problem, the present invention provides an electrowetting display panel, including:
a first substrate, comprising:
a first flexible substrate;
the driving layer is arranged on the first flexible substrate; the driving layer includes a plurality of switching elements;
the first electrode layer is arranged on the driving layer; the first electrode layer includes a plurality of electrode portions;
the hydrophobic insulating layer is arranged on the first electrode layer;
a second substrate disposed opposite to the first substrate, the second substrate including:
a second flexible substrate;
the second electrode layer is arranged on one side, close to the first electrode layer, of the second flexible substrate;
the latticed insulating retaining wall is arranged between the hydrophobic insulating layer and the second electrode layer; the latticed insulating retaining wall is provided with a plurality of opening areas;
a plurality of display units, the display units comprising at least three display subunits, the display subunits located within the open area, the display subunits comprising a non-polar liquid and a polar liquid; the display unit corresponds to the switch element, and the display unit corresponds to the electrode portion.
The invention also provides a manufacturing method of the electrowetting display panel, which comprises the following steps:
sequentially manufacturing a first flexible substrate, a driving layer, a plurality of electrode parts and a hydrophobic insulating layer on a first glass substrate;
manufacturing a latticed insulating retaining wall on the hydrophobic insulating layer; the latticed insulating retaining wall is provided with a plurality of opening areas;
filling a non-polar liquid in the opening region;
sequentially manufacturing a second flexible substrate and a second electrode layer under a second glass substrate to obtain a second substrate;
removing the first glass substrate and the second glass substrate;
the first substrate and the second substrate are paired, and polar liquid is filled in the opening area;
and attaching the first substrate and the second substrate.
According to the electrowetting display panel and the manufacturing method thereof, the switch element controls the voltage difference between the electrode part and the second electrode layer, so that the display panel is in color display or non-color display, and a plurality of display units can be driven simultaneously, so that the manufacturing process is simplified, and the manufacturing precision is reduced.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a conventional electrowetting display device with no applied voltage;
FIG. 2 is a schematic diagram of a conventional electrowetting display device with applied voltage;
fig. 3 is a schematic structural diagram of an electrowetting display panel according to an embodiment of the invention;
FIG. 4 is a top view of the insulated retaining wall of FIG. 3;
fig. 5 is a flowchart of a method for manufacturing an electrowetting display panel according to an embodiment of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
As shown in fig. 1, the electrowetting display panel includes a substrate 11, a first electrode 12, a hydrophobic insulating layer 13, ink 14, water 15, and a second electrode 16. Due to the use of highly hydrophobic materials that can exclude water from the surface and use ink as the medium, forming separate oil and water phases, the wetting effect of a water-resistant surface can be altered by a voltage, making the surface more hydrophilic.
As shown in fig. 2, when no voltage is applied, the ink 14 is not hydrophilic 15 and is insulating, forming a flat film, which is a colored pixel; when voltage is applied, the tension of the contact surface between the ink 14 and the outer layer of the electrode changes, so that the original state is not stable any more, and the ink 14 moves aside, thereby forming a partially transparent pixel. The advantage of electrowetting display panels is that the response speed is fast compared to electronic ink, and that its dyes can be added to the ink to achieve different colors.
Referring to fig. 3 to 5, fig. 3 is a schematic structural diagram of an electrowetting display panel according to an embodiment of the invention.
As shown in fig. 3, the electrowetting display panel of the present embodiment includes a first substrate 20, a second substrate 30, a grid-shaped insulating barrier 40, and a plurality of display units 50. The electrowetting display panel 100 may further include data lines and scan lines (both shown).
Wherein the first substrate 20 includes a first flexible substrate 21, a driving layer 22, a first electrode layer 23, and a hydrophobic insulating layer 24; the driving layer 22 is arranged on the first flexible substrate 21; the drive layer 22 includes a plurality of switching elements (all shown); the switching element is, for example, a thin film transistor. The switching element includes a control terminal connected to the scan line, an input terminal connected to the data line, and an output terminal connected to the electrode portion 231.
The first electrode layer 23 is disposed on the driving layer 22. The first electrode layer 23 includes a plurality of electrode portions 231, and only a single electrode portion is illustrated in fig. 3 to 5, but the present invention is not limited thereto. A hydrophobic insulating layer 24 is provided between the first electrode layer 23 and the display unit 50.
The second substrate 30 is disposed opposite to the first substrate 20, and the second substrate 30 includes: a second flexible substrate 31 and a second electrode layer 32. The second electrode layer 32 is arranged on one side, close to the first electrode layer 23, of the second flexible substrate 32; the material of the second electrode layer 32 may be a transparent conductive material, such as ITO.
Referring to fig. 4, a grid-shaped insulating barrier wall 40 is disposed between the first electrode layer 23 and the second electrode layer 32; the grid-shaped insulating wall 40 has a plurality of open regions 401.
The display unit 50 comprises at least three display subunits 501-503, the display subunits are positioned in the opening region 401, and the display subunits comprise a non-polar liquid 51 and a polar liquid 52; the display subunit corresponds to the switching element. And the display unit 50 corresponds to the electrode portion 231. The position of the electrode 231 corresponds to the position of the display unit 50, and in one embodiment, the electrode 231 may cover the display unit 50 to improve the display effect. That is, the forward projection area of the electrode portion 231 on the first flexible substrate 21 is greater than or equal to the forward projection area of the display unit 50 on the first flexible substrate 21.
In one embodiment, the polar liquid may specifically be water. In one embodiment, the polar liquid 51 includes a first non-polar liquid, a second non-polar liquid, and a third non-polar liquid. In one embodiment, the non-polar liquid 51 may be specifically a color ink, the first non-polar liquid being, for example, a cyan ink, the second non-polar liquid being, for example, a magenta ink, and the third non-polar liquid being, for example, a yellow ink. I.e. the non-polar liquid 51 in adjacent three display subunits 50 is of different color.
In an embodiment, the electrowetting display panel further includes a spacer (not shown) disposed between the first substrate 20 and the second substrate 30, and the insulating barrier 40 and the spacer are disposed on the same layer and have the same material. In one embodiment, the material of the insulating wall 40 includes a black photoresist material. But the material of the insulating banks 40 is not limited thereto.
In one embodiment, the height of the insulating wall 40 at the periphery of the electrowetting display panel 100 is less than the height of the insulating wall 40 at the inner region of the electrowetting display panel. For example, the height of the insulating walls 40 at the left and right sides is smaller than the height of the two insulating walls 40 at the middle region.
In an embodiment, the electrowetting display panel 100 may further include a sealant 60, and the sealant 60 is disposed on the insulating retaining wall 40 located at the periphery of the electrowetting display panel. In other embodiments, the height of each insulating wall 40 may be equal, and the material of the insulating wall 40 is a colloid.
Wherein the height of the insulating barriers 40 located in the inner region of the electrowetting display panel 100 is equal to the distance between the first substrate 20 and the second substrate 30. Wherein the height of the insulating wall 40 at the periphery of the electrowetting display panel is greater than or equal to the height of the non-polar liquid 51.
In one embodiment, during the specific driving process, the second electrode layer 32 is connected to a constant high potential, and when the switching element is turned off, the electrode portion 231 is not connected to a voltage, so that a voltage difference is generated between the upper substrate and the lower substrate to form a transparent pixel; when the switch element is closed, the electrode portion 231 is connected to a voltage, so that no voltage difference is generated between the upper substrate and the lower substrate, and colored pixels are formed.
Taking the non-polar liquid 51 as ink and the polar liquid 52 as water as an example, when no voltage is applied to the electrode 231, the ink forms a uniform thin film between the water and the hydrophobic insulating layer 24, which is equivalent to a colored pixel point, thereby forming a color display; when a voltage is applied to the electrode 231, water moves into contact with the hydrophobic insulating layer 24, and the ink is pushed aside, thereby forming transparent pixels.
As shown in fig. 5, the present invention further provides a method for manufacturing an electrowetting display panel, which includes:
s101, sequentially manufacturing a first flexible substrate 21, a driving layer 22, a plurality of electrode parts 231 and a hydrophobic insulating layer 24 on a first glass substrate 21' to obtain a first substrate 20;
wherein on the first glass substrate 21' means the side close to the second substrate.
For example, a whole first electrode layer is formed on the driving layer 22, and the first electrode layer is patterned to form a plurality of electrode portions 231.
S102, manufacturing a latticed insulating retaining wall 40 on the hydrophobic insulating layer 24; the latticed insulating retaining wall 40 has a plurality of open regions 401;
s103, filling the opening region 401 with a non-polar liquid 51;
the nonpolar liquids 51 of different colors can be filled separately, for example, by Ink Jet Printing (IJP).
S104, sequentially manufacturing a second flexible substrate 31 and a second electrode layer 32 under a second glass substrate 31' to obtain a second substrate 30;
wherein the lower side of the second glass substrate 31' refers to the side close to the first substrate.
S105, removing the first glass substrate 21 'and the second glass substrate 31';
s106, combining the first substrate 20 and the second substrate 30, and filling a polar liquid into the opening region 401;
and S107, bonding the first substrate 20 and the second substrate 30.
In one embodiment, the frame glue 60 may be coated on the insulating wall 40 located at the periphery of the display panel, and then cured, so that the first substrate 20 and the second substrate 30 are bonded.
The above method may further comprise: a flexible circuit board 61 is bound on the drive layer 22, and the main board 62 is connected to the flexible circuit board 61.
It is to be understood that fig. 3 to 5 are only given as examples and are not intended to limit the present invention.
Because the electrode part is arranged on the first substrate and the second electrode layer is arranged on the second substrate, the display panel is in color display or non-color display by controlling the pressure difference between the electrode part and the second electrode layer through the switch element, and a plurality of display units can be driven simultaneously, so that the manufacturing process is simplified, and the manufacturing precision is reduced.
According to the electrowetting display panel and the manufacturing method thereof, the switch element controls the voltage difference between the electrode part and the second electrode layer, so that the display panel is in color display or non-color display, and a plurality of display units can be driven simultaneously, so that the manufacturing process is simplified, and the manufacturing precision is reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. An electrowetting display panel, comprising:
a first substrate, comprising:
a first flexible substrate;
the driving layer is arranged on the first flexible substrate; the driving layer includes a plurality of switching elements;
the first electrode layer is arranged on the driving layer; the first electrode layer includes a plurality of electrode portions;
the hydrophobic insulating layer is arranged on the first electrode layer;
a second substrate disposed opposite to the first substrate, the second substrate including:
a second flexible substrate;
the second electrode layer is arranged on one side, close to the first electrode layer, of the second flexible substrate;
the latticed insulating retaining wall is arranged between the hydrophobic insulating layer and the second electrode layer; the latticed insulating retaining wall is provided with a plurality of opening areas;
a plurality of display units, the display units comprising at least three display subunits, the display subunits located within the open area, the display subunits comprising a non-polar liquid and a polar liquid; the display unit corresponds to the switch element, and the display unit corresponds to the electrode portion.
2. The electrowetting display panel according to claim 1, further comprising: locate first base plate with the clearance between the second base plate, insulating barricade with the clearance is with the same layer setting and the material is the same.
3. Electrowetting display panel according to claim 2,
the material of the insulating retaining wall comprises black photoresist material.
4. The electrowetting display panel according to claim 1, wherein the electrode section covers the display unit.
5. The electrowetting display panel according to claim 1, wherein the height of the insulating barrier at the periphery of the electrowetting display panel is less than the height of the insulating barrier at the inner region of the electrowetting display panel.
6. The electrowetting display panel according to claim 5, further comprising a sealant disposed on the insulating barrier wall at the periphery of the electrowetting display panel.
7. The electrowetting display panel according to claim 6, wherein a height of the insulating barrier at an inner region of the electrowetting display panel is equal to a distance between the first substrate and the second substrate.
8. The electrowetting display panel according to claim 5, wherein a height of the insulating barrier at a periphery of the electrowetting display panel is greater than or equal to a height of the non-polar liquid.
9. The electrowetting display panel according to claim 1, comprising data lines and scan lines; the switching element includes a control terminal, an input terminal, and an output terminal, the control terminal is connected to the scan line, the input terminal is connected to the data line, and the output terminal is connected to the electrode unit.
10. A method for manufacturing an electrowetting display panel, comprising:
sequentially manufacturing a first flexible substrate, a driving layer, a plurality of electrode parts and a hydrophobic insulating layer on a first glass substrate;
manufacturing a latticed insulating retaining wall on the hydrophobic insulating layer; the latticed insulating retaining wall is provided with a plurality of opening areas;
filling a non-polar liquid in the opening region;
sequentially manufacturing a second flexible substrate and a second electrode layer under a second glass substrate to obtain a second substrate;
removing the first glass substrate and the second glass substrate;
the first substrate and the second substrate are paired, and polar liquid is filled in the opening area;
and attaching the first substrate and the second substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407042.2A CN111487761A (en) | 2020-05-14 | 2020-05-14 | Electrowetting display panel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010407042.2A CN111487761A (en) | 2020-05-14 | 2020-05-14 | Electrowetting display panel and manufacturing method thereof |
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| CN111487761A true CN111487761A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010407042.2A Pending CN111487761A (en) | 2020-05-14 | 2020-05-14 | Electrowetting display panel and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114879425A (en) * | 2022-05-25 | 2022-08-09 | 京东方科技集团股份有限公司 | Display panel, method of making display panel, and display device |
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| CN1881003A (en) * | 2005-06-15 | 2006-12-20 | 三星电子株式会社 | Electrowetting display panel and method for manufacturing same |
| CN101359091A (en) * | 2007-08-03 | 2009-02-04 | 群康科技(深圳)有限公司 | Electrowetting display and manufacturing method thereof |
| CN104049359A (en) * | 2014-05-19 | 2014-09-17 | 京东方科技集团股份有限公司 | Electric wetting display panel, electric wetting display panel manufacturing method and display device |
| CN106255920A (en) * | 2014-03-04 | 2016-12-21 | 三星电子株式会社 | Display device and manufacturing method thereof |
| CN109116550A (en) * | 2018-11-05 | 2019-01-01 | 京东方科技集团股份有限公司 | A kind of electrowetting display device and preparation method thereof |
-
2020
- 2020-05-14 CN CN202010407042.2A patent/CN111487761A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881003A (en) * | 2005-06-15 | 2006-12-20 | 三星电子株式会社 | Electrowetting display panel and method for manufacturing same |
| CN101359091A (en) * | 2007-08-03 | 2009-02-04 | 群康科技(深圳)有限公司 | Electrowetting display and manufacturing method thereof |
| CN106255920A (en) * | 2014-03-04 | 2016-12-21 | 三星电子株式会社 | Display device and manufacturing method thereof |
| CN104049359A (en) * | 2014-05-19 | 2014-09-17 | 京东方科技集团股份有限公司 | Electric wetting display panel, electric wetting display panel manufacturing method and display device |
| CN109116550A (en) * | 2018-11-05 | 2019-01-01 | 京东方科技集团股份有限公司 | A kind of electrowetting display device and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114879425A (en) * | 2022-05-25 | 2022-08-09 | 京东方科技集团股份有限公司 | Display panel, method of making display panel, and display device |
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Application publication date: 20200804 |