CN101666908A - Pixel structure for displaying device and displaying device - Google Patents

Pixel structure for displaying device and displaying device Download PDF

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Publication number
CN101666908A
CN101666908A CN200810212905A CN200810212905A CN101666908A CN 101666908 A CN101666908 A CN 101666908A CN 200810212905 A CN200810212905 A CN 200810212905A CN 200810212905 A CN200810212905 A CN 200810212905A CN 101666908 A CN101666908 A CN 101666908A
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layer
dot structure
active component
structure according
light
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CN200810212905A
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CN101666908B (en
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庄凯丞
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Prime View International Co Ltd
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Prime View International Co Ltd
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Abstract

The invention provides a pixel structure for a displaying device and the displaying device, wherein the pixel structure uses a light entering from the outside of the displaying device as a light source. The pixel structure comprises a first substrate, a light barrier layer, an active element and a moveable light shielding layer, wherein the light barrier layer is arranged on the first substrate and provided with a transparent area and a lightproof area; the active element is arranged in the lightproof area of the light barrier layer and has a first state and a second state; and the moveable light shielding layer is arranged on the light barrier layer and the active element. When the active element is in the first state, the moveable light shielding layer properly shields the transparent area so as to prevent the light from emitting out from the first substrate; and when the active element is in the second state, the moveable light shielding layer is driven to allow the light ray to passes through the transparent area and to be projected out from the first substrate.

Description

Be applied to dot structure and this display device of display device
Technical field
The invention relates to a kind of display device; Particularly about a kind of dot structure that is applied to electric moistening display apparatus, and the electric moistening display apparatus that uses this dot structure.
Background technology
Along with making rapid progress of development in science and technology, various portable electronic devices as mobile phone, PDA(Personal Digital Assistant), digital camera, digital code camera etc., bring the human lives and greatly facilitate, and the also more and more variation of its specification and function.Wherein, constantly be developed about the display technique of portable electronic devices, to satisfy various demand.
Because portable electronic devices emphasizes small size, lightweight with easy to carry, so portable electronic devices also must take into account power saving simultaneously to prolong the endurance of battery, avoids the often trouble of charging.Wherein, adopting external environment light is to be light source with extraneous surround lighting as the reflected displaying device of light source, and utilizes the reflector plate of panel below that illumination light is reflected, as the effective technology that reduces portable electronic devices power consumption.This non-self luminous display mode does not need backlight and backlight, therefore the consumption that has reduced power supply has also alleviated installation weight, and thickness attenuation, characteristic such as simple in structure have produce easily, advantage such as cost reduction, make product price kinder and more approachable.
In the display technique that adopts external light source, electric wet-type display has very gratifying optical characteristics.It not only has frivolous advantage, and the speed of this display picture element change-over switch is also quite rapid, is suitable for playing film, is the display technique of quite being expected therefore.
Fig. 1 a to Fig. 1 b is depicted as the dot structure synoptic diagram of a conventional reflective electric moistening display apparatus.Dot structure 1 has an opaque substrate 11, fits to reflect the ambient light that enters dot structure 1, with the light source as display device.One reflection electrode layer 12 and a transparent electrode layer 14 are arranged on the substrate 11, wherein reflection electrode layer 12 is controlled by a thin film transistor (TFT) (not shown), also be provided with a hydrophobic layer 13 on the reflection electrode layer 12, on reflection electrode layer 12 or below (for example: aluminum or aluminum alloy) be coated with the metallic reflection material, in order to reflecting extraneous ambient light, and between transparent electrode layer 14 and hydrophobic layer 13, be equipped with an opaque non-polar liquid 15 and a transparent polar liquid 16.Hydrophobic layer 13 is made up of a transparent insulating material, and non-polar liquid 15 is generally printing ink, and polar liquid 16 is generally water, and hydrophobic layer 13 is generally the material of Teflon series.
As shown in Figure 1a, under situation not to two electrode application voltage, hydrophobic layer 13 has less affinity to the surface tension of polar liquid 16, therefore be difficult for absorption polar liquid 16, easy on the contrary affinity non-polar liquid 15 so just makes non-polar liquid 15 can disperse to be covered on the hydrophobic layer 13.After entering dot structure 1, just can absorb by part or all of dispersed non-polar liquid 15, thereby present the color of non-polar liquid 15 when light.
Shown in Fig. 1 b, two electrodes are being applied under the voltage condition, the dielectric medium characteristic of hydrophobic layer 13 is subjected to two interelectrode electric field influence and produces change, and its character of surface also can change, then polar liquid 16 is had higher affinity.Therefore under the situation of energising, polar liquid 16 is subjected to hydrophobic layer 13 after surface energy changes and attracts and move, and then non-polar liquid 15 pushed arranges, and makes dot structure 1 expose the color of substrate 11.
In the display device of practice, can use a white substrate 11, and the combination of pixels of many use different colours printing ink is got up.Utilize the electrode control different pixels respectively, make printing ink scatter or a corner of the pixel of withdrawing, just can on visual effect, produce effect as the paper of colored printing.Thisly do well at aspect of performance based on the moistening display of electricity, the slewing rate between white and the colour reflective is enough fast, is enough to show substance film.In addition, the quite power saving of this kind display, and make very flat thinly.
Yet in the electric wet-type display of this kind structure, because ink lay is not transparent fully, therefore when a corner of printing ink withdrawal pixel, still can present the light of part near this printing ink above this printing ink, the contrast that makes this pixel be presented when switch descends.Please refer to Fig. 1 c, prior art is in order to solve this problem, be in dot structure 1, to add a black matrix 17, and make its position that should deceive matrix 17 and big or small fitting to cover the printing ink of withdrawal fully, to increase the contrast of display device in the top of this transparent electrode layer 14.Yet transparent electrode layer 14 is to be made on the offside substrate of substrate 11, if desire to add the black matrix 17 of one deck on transparent electrode layer 14, the offside substrate that then is printed on black matrix 17 and transparent electrode layer 14 is in manufacture process, need and be encapsulated with substrate 11 contraposition accurately, this step will increase the degree of difficulty of making, and also improve manufacturing cost.And, on reflection electrode layer 12 or below during the coating reflecting material, also must avoid thin film transistor (TFT) distributing position and must be in addition with suitable photomask carrying out the patterning operation, thereby increase the complicacy and the cost of technology.
In view of this, provide one can improve pixel demonstration contrast, and reduce the electric wet-type display dot structure of making degree of difficulty and cost simultaneously, this is this industry problem demanding prompt solution.
Summary of the invention
A purpose of the present invention is to provide a kind of dot structure that is applied to display device, and it is to utilize electric moistening display technique, and makes black matrix and other main element be arranged at bright dipping side group plate in the lump simultaneously.Dot structure of the present invention has and high shows contrast, and processing procedure is comparatively simplified and is easy to and makes.
Another object of the present invention is to be provided in a kind of display device, utilize the setting of electric moistening display technique and black matrix, make it have high-contrast and simple structure simultaneously.
For reaching above-mentioned purpose, the disclosed dot structure of the present invention and comprise the display device of a plurality of dot structures, dot structure wherein of the present invention is that a light that utilizes the display device outside to enter is a light source, this dot structure comprises one first substrate, one photoresist layer, an active component and a movable light shield layer.This photoresist layer is arranged on this first substrate, has a photic zone and a light tight district.This active component is arranged in this light tight district of this photoresist layer, and this active component has one first state and one second state.This activity light shield layer is arranged on this photoresist layer and this active component.Wherein when this active component was in this first state, this activity light shield layer is suitable can to cover this photic zone, outwards penetrates from this first substrate to cover this light; When this active component was in this second state, this activity light shield layer was driven, so that this light must outwards penetrate from this first substrate by this photic zone.
Description of drawings
For above-mentioned purpose of the present invention, technical characterictic and advantage can be become apparent, below conjunction with figs. is elaborated to preferred embodiment of the present invention, wherein:
Fig. 1 a is the synoptic diagram that does not apply voltage in the conventional pixel structure;
Fig. 1 b is the synoptic diagram that applies voltage in the conventional pixel structure;
Fig. 1 c is the synoptic diagram that has black matrix in the conventional pixel structure;
Fig. 2 is the synoptic diagram that does not apply the dot structure of voltage in one embodiment of the invention;
Fig. 3 is the synoptic diagram that applies the dot structure of voltage in one embodiment of the invention; And
Fig. 4 is the synoptic diagram of display device of the present invention.
Embodiment
The present invention discloses a kind of dot structure 2 and comprises the display device 100 of a plurality of dot structures 2, wherein, each dot structure as shown in Figures 2 and 3, display device 100 please refer to shown in Figure 4.Figure 2 shows that dot structure of the present invention is not applying the state of voltage, shown in Figure 3 is in the state that applies voltage for dot structure of the present invention.Dot structure 2 comprise one first substrate 31 and one second substrate, 40, the first substrates 31 be a transparency carrier with exiting surface as this dot structure 2, second substrate is 40 to be an opaque substrate and to be oppositely arranged with first substrate 31.First substrate 31 is provided with one deck photoresist layer 33, and limits a photic zone 331 (white portion in the photoresist layer 33 as shown in the figure) and a light tight district 332 (gray area in the photoresist layer 33 as shown in the figure).Light tight district 332 comprises a black matrix 3321, and suitable to stop that light enters or penetrate this dot structure 2 by light tight district 332, photic zone 331 can be transparent insulation material such as monox in addition.
Active component 32 is that (Thin film transistor, TFT), it has one first state and one second state to a thin film transistor (TFT), respectively the state of closing and opening of representative control pixel status.Active component 32 is arranged in the light tight district 332 of photoresist layer 33, and is electrically connected to an electrode layer 35.Electrode layer 35 is transparency conducting layers, its material can be selected from indium tin oxide (Indium Tin Oxide, ITO) or other transparent conductive material.Dot structure 2 also has a passivation layer (Passive layer) 36 on active component 32 and photoresist layer 33, with in order to interval active component 32 and electrode layer 35.
Electrode layer 35 is provided with a hydrophobic layer (Hydrophobic layer) 37, and hydrophobic layer 37 is transparent dielectric mediums.Dot structure 2 is equipped with a non-polar liquid and a polar liquid layer 39 between the hydrophobic layer 37 and second substrate 40.Wherein this non-polar liquid forms a movable light shield layer 34, fits and can cover this electrode layer 35, and be positioned at the top of this active component 32 and this photoresist layer 33.Wherein this non-polar liquid is one to have the opaque ink of color or black, and polar liquid layer 39 is transparency liquids, as the potpourri of water or water, alcohol and salts substances, but is not limited only to this.On the other hand, on hydrophobic layer 37, also be provided with a barricade (grid) 38, suitable with the interstructural movable light shield layer 34 of different pixels in the display of interval.
Second substrate 40 is provided with a reflection horizon 41, and suitable this light that enters outside this display device with reflection makes this light must pass through this photic zone 331, and this first substrate 31 outwards penetrates certainly.The material in this reflection horizon 41 is aluminum or aluminum alloy, and is electrically connected to this active component 32.
As shown in Figure 2, active component 32 is when being in first state, that is closed condition.Active component 32 does not apply a voltage to electrode layer 35, there is no electric field between electrode layer 35 and the reflection horizon 41 and exists.The affinity of 37 pairs of non-polar liquids of hydrophobic layer this moment is good to the affinity of polar liquid layer 39, therefore hydrophobic layer 37 can repel polarity liquid level 39, make polar liquid form a movable light shield layer 34, entirely cover hydrophobic layer 37 and photic zone 331, and interval hydrophobic layer 37 and polar liquid layer 39.This moment is when an ambient light enters dot structure 2 by light-permeable district 331, part coloured light different with movable light shield layer 34 frequencies in this light will be absorbed by movable light shield layer 34, and the part coloured light identical with movable light shield layer 34 frequencies will outwards penetrate from movable light shield layer 34 in this light, makes dot structure 2 present the color that movable light shield layer 34 is presented.For example, when movable light shield layer 34 is red ink, only have red coloured light will reflect dot structure 2, and the coloured light of all the other frequencies will be absorbed.
As shown in Figure 3, this moment, active component 32 was to be in second state, that is during opening, will apply a voltage to making electrode layer 35, made it have CHARGE DISTRIBUTION thereon, and made existence one electric field between electrode layer 35 and the reflection horizon 41.The hydrophobic layer 37 that is arranged in this electric field is subjected to this electric field effects, its surface physical characteristic changes, then polar liquid layer 39 had higher affinity, therefore polar liquid layer 39 can be subjected to the attraction of hydrophobic layer 37 and move toward the surface of hydrophobic layer 37, and pushes this non-polar liquid to barricade 38 1 sides.Movable light shield layer 34 will be contracted to barricade 38 1 sides of this dot structure 2, layer light of 41 reflections that is reflected is got directly pass through photic zone 331, this first substrate 31 outwards penetrates certainly, and allows this dot structure present the state of a bright spot.
In this dot structure 2, the black matrix area in light tight district 332 is suitable can be when active component 32 be in second state, covers this active component 32, barricade 38 and contracts to the movable light shield layer 34 of this dot structure 2 one sides.Therefore be in second state at active component 32, that is this pixel is should present the state of bright spot the time, the light that should project will be not can be by these activity light shield layer 34 light leaks, and have the color of this activity light shield layer 34, the contrast of pixel can greatly improve thus.
In sum, the present invention is positioned on first substrate 31 of exiting surface black matrix, active component 32 and the movable light shield layer 34 in this photoresist layer 33 equally, can save and deceive matrix base plate in the traditional electrical moistening display apparatus and have the step of active element substrate contraposition, the difficulty of technology is significantly reduced.This is external to be coated with in the process in reflection horizon 41, because reflection horizon 41 is to be arranged on second substrate 40 relative with active component 32, therefore need not to carry out special patterning operation, but and full wafer ground is sputtered at aluminium on second substrate 40 fast and evenly, thereby further simplified the process of making.
The above embodiments only are used for exemplifying enforcement aspect of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting protection category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, the scope of the present invention should be as the criterion with the application's claim institute restricted portion.

Claims (19)

1. dot structure that is applied to display device, this dot structure are that a light that utilizes this display device outside to enter is a light source, and this dot structure comprises:
One first substrate;
One photoresist layer is arranged on this first substrate, has a photic zone and a light tight district;
One active component is arranged in this light tight district of this photoresist layer, and this active component has one first state and one second state; And
One movable light shield layer is arranged on this photoresist layer and this active component,
Wherein when this active component was in this first state, this activity light shield layer is suitable can to cover this photic zone, outwards penetrates from this first substrate with at least a portion of covering this light; And when this active component was in this second state, this activity light shield layer was driven, so that this light passes through this photic zone, this first substrate outwards penetrates certainly.
2. dot structure according to claim 1 is characterized in that this photoresist layer also comprises a black matrix, is arranged in this light tight district of this photoresist layer, and is suitable to stop this light.
3. dot structure according to claim 2, it is characterized in that also comprising an electrode layer, be arranged at this active component and should the activity light shield layer between, and electrically connect this active component, wherein when this active component is in this first state, this electrode layer does not apply voltage, and when this active component was in second state, this electrode layer was applied in a voltage and has a CHARGE DISTRIBUTION.
4. dot structure according to claim 3 is characterized in that this electrode layer comprises an indium tin oxide layer.
5. dot structure according to claim 3 is characterized in that also comprising a passivation layer, is arranged between this active component and this electrode layer, in order to this active component of interval and this electrode layer.
6. dot structure according to claim 3 is characterized in that also comprising a hydrophobic layer, be arranged at this electrode layer and should the activity light shield layer between.
7. dot structure according to claim 6 is characterized in that also comprising a barricade, is arranged on this hydrophobic layer.
8. dot structure according to claim 7, it is characterized in that when this active component be that this photoresist layer covers this active component, this activity light shield layer and this barricade at least when being in this second state.
9. dot structure according to claim 8 is characterized in that also comprising one second substrate, is oppositely arranged with this first substrate.
10. dot structure according to claim 9, it is characterized in that also comprising a polar liquid layer, be arranged between this activity light shield layer and this second substrate, wherein when this active component was in this first state, this activity light shield layer covered this hydrophobic layer with this hydrophobic layer of interval and this polar liquid layer; When this active component was in this second state, this polar liquid layer was subjected to that this hydrophobic layer attracts and moves toward this hydrophobic layer, and drove this activity light shield layer toward this barricade side shifting, made this light can pass through this photic zone, and this first substrate outwards penetrates certainly.
11. dot structure according to claim 9, it is characterized in that also comprising a reflection horizon, be arranged on this second substrate, be electrically connected to this active component, suitable this light that enters from this display device outside with reflection in this reflection horizon, make this light by this photic zone, this first substrate outwards penetrates certainly.
12. dot structure according to claim 11 is characterized in that the material in this reflection horizon comprises aluminium.
13. dot structure according to claim 11 is characterized in that the material in this reflection horizon comprises aluminium alloy.
14. dot structure according to claim 1 is characterized in that this active component comprises at least one thin film transistor (TFT).
15. dot structure according to claim 1 is characterized in that this activity light shield layer is to be a non-polar liquid.
16. dot structure according to claim 15 is characterized in that this non-polar liquid is a printing ink.
17. dot structure according to claim 10 is characterized in that this polar liquid is water.
18. dot structure according to claim 10 is characterized in that this polar liquid is the potpourri of water, alcohol and salts substances.
19. a display device is characterized in that comprising a plurality of dot structures as claimed in claim 1.
CN200810212905XA 2008-09-04 2008-09-04 Pixel structure for displaying device and displaying device Active CN101666908B (en)

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CN102419474A (en) * 2010-09-27 2012-04-18 薛英家 Electrowetting element with hydrophobic retaining wall and manufacture method thereof
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CN103064181A (en) * 2012-11-23 2013-04-24 陈明晖 Bistable state electric wetting display device
US8599465B2 (en) 2010-09-23 2013-12-03 Incha Hsieh Method for making an electrowetting device
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CN111025622A (en) * 2019-12-24 2020-04-17 上海天马微电子有限公司 Electrowetting display panel and 3D printing system
WO2020143530A1 (en) * 2019-01-11 2020-07-16 京东方科技集团股份有限公司 Sub-pixel structure, display panel and manufacturing method therefor and control method therefor, and display device

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US8599465B2 (en) 2010-09-23 2013-12-03 Incha Hsieh Method for making an electrowetting device
CN102419474A (en) * 2010-09-27 2012-04-18 薛英家 Electrowetting element with hydrophobic retaining wall and manufacture method thereof
CN102419474B (en) * 2010-09-27 2013-12-04 薛英家 Manufacture method of electrowetting element with hydrophobic retaining wall
CN102707432A (en) * 2011-10-18 2012-10-03 京东方科技集团股份有限公司 Electrowetting display panel and method for producing same
WO2013056639A1 (en) * 2011-10-18 2013-04-25 京东方科技集团股份有限公司 Electrowetting display panel and manufacturing method therefor
US8755104B2 (en) 2011-10-18 2014-06-17 Boe Technology Group Co., Ltd. Electrowetting display panel and the manufacturing method thereof
CN102707432B (en) * 2011-10-18 2015-11-18 京东方科技集团股份有限公司 A kind of Electrowetting display panel and preparation method thereof
CN103542278A (en) * 2012-07-10 2014-01-29 元太科技工业股份有限公司 Lamp
CN103542278B (en) * 2012-07-10 2015-08-12 元太科技工业股份有限公司 Light fixture
CN103064181A (en) * 2012-11-23 2013-04-24 陈明晖 Bistable state electric wetting display device
CN106646927A (en) * 2016-11-02 2017-05-10 京东方科技集团股份有限公司 Display panel and display device
CN106773308A (en) * 2017-01-03 2017-05-31 京东方科技集团股份有限公司 A kind of display panel and its manufacture method, display device
CN107132653A (en) * 2017-07-12 2017-09-05 京东方科技集团股份有限公司 Dot structure, display base plate and display panel
US10795150B2 (en) 2017-07-12 2020-10-06 Boe Technology Group Co., Ltd. Pixel unit, display substrate and display panel
CN108897180A (en) * 2018-07-03 2018-11-27 京东方科技集团股份有限公司 Display panel, display device and its display methods
US11237381B2 (en) 2018-07-03 2022-02-01 Beijing Boe Optoelectronics Technology Co., Ltd. Electrowetting display panel, electrowetting display apparatus, method of driving electrowetting display panel, and method of fabricating electrowetting display panel
WO2020143530A1 (en) * 2019-01-11 2020-07-16 京东方科技集团股份有限公司 Sub-pixel structure, display panel and manufacturing method therefor and control method therefor, and display device
US11699708B2 (en) 2019-01-11 2023-07-11 Chengdu Boe Optoelectronics Technology Co., Ltd. Sub-pixel structure, display panel and control method therefor, and display device
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CN111025622B (en) * 2019-12-24 2022-01-25 上海天马微电子有限公司 Electrowetting display panel and 3D printing system

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