CN105676444A - Electrowetting bistable electrofluid display device - Google Patents
Electrowetting bistable electrofluid display device Download PDFInfo
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- CN105676444A CN105676444A CN201610151042.4A CN201610151042A CN105676444A CN 105676444 A CN105676444 A CN 105676444A CN 201610151042 A CN201610151042 A CN 201610151042A CN 105676444 A CN105676444 A CN 105676444A
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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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Abstract
The invention belongs to the technical field of optical element, and discloses an electrowetting bistable electrofluid display device. The device comprises a first base plate, a second base plate, an oily first fluid and a second fluid which is incompatible with the first fluid and has electrical conductivity, a pixel unit is formed between the first base plate and the second base plate, a first electrode layer and a first hydrophobic insulating layer are arranged from up to down on a lower surface of the first base plate in sequence, a second electrode layer and a second hydrophobic insulating layer are arranged from down to up on an upper surface of the second base plate in sequence, a metal wire and a packaging adhesive are arranged between the first base plate and the second base plate, and the metal wire is electrically connected with a common electrode. According to the invention, the device adopts an space used for accommodating the first fluid and the second fluid and arranged on the base plate, the packaging adhesive is used for adhering and packaging a corresponding projection portion into independent pixel units, so that disordered display caused by series flow of the fluid between the pixel units can be effectively avoided, and the device has better stability than before and low energy consumption.
Description
Technical field
The present invention relates to optical element technology field, particularly relate to a kind of electrowetting bistable electro fluid display device.
Background technology
Day by day prosperous along with electronic product development such as the development of Display Technique and TV, flat board, mobile phones, the life of people every day is all occupied by various display devices. Display Technique has the liquid crystal display of bigger market share and the plasma scope etc. of the marketization till now from initial cathode-ray tube display, it is achieved that be shown to colored display from monochrome, from large volume to display pure flat, ultra-thin. But liquid crystal display and plasma show and be respectively adopted backlight and polarization technology, it is relatively big that this allows for its energy consumption, improves the problems such as comparatively difficulty, high cost, high energy consumption and high heat radiation due to angle of visibility, limits its development and application in display. Therefore having low energy consumption, eye protection, par Display Technique easy to carry become the demand in market.
In recent years, the reflective Display Technique based on electrowetting breaches the inferior position that electrophoretic electronic paper Display Technique response speed is not high, becomes and realizes one of video implementation of most potentiality showing Electronic Paper. This electrofluid Display Technique does not only have high response speed and has the advantages such as high reflectance, high-contrast, low-voltage, low-power consumption.
Electrowetting principle refers to by adjusting the electric potential difference being applied between liquid solid electrode, changes the surface tension between liquid and solid, thus changing contact angle between the two, carries out relative motion. The electrofluid display device of electrowetting principle can control gray scale to realize multicolor displaying or to control gray scale and coordinating with color film by the contraction under Control of Voltage of the black oil film and extension and realize display or by the contraction under Control of Voltage of the black oil film with extend and control gray scale and realize white and black displays by the contraction under Control of Voltage of coloured oil film and extension.
Energy consumption is to evaluate the important indicator of a display.Along with people are for the development of the portable demand of electronic product, the factor of electronic product display power consumption by extensive concern and becomes tackling key problem hot technology. At present, major part electrofluid display device does not possess bistability, and namely the maintenance of image needs to provide lasting voltage, this energy consumption being unfavorable for undoubtedly reducing display device.
Summary of the invention
The technical problem to be solved, it is in that to provide a kind of electrowetting bistable electro fluid display device, its can overcome instability that in prior art, electrofluid display screen shows, voltage take-off after the technical problem that can not keep for a long time of image, and there is simple in construction, the feature that easily fabricated, reliable and stable, energy consumption is relatively low.
This invention address that above-mentioned technical problem be the technical scheme is that
The invention provides a kind of electrowetting bistable electro fluid display device, including first substrate, second substrate, the first fluid of oiliness and with described first fluid objectionable intermingling and the second fluid with electric conductivity, the pixel cell for housing described first fluid and second fluid is formed between described first substrate and second substrate, the lower surface of described first substrate is disposed with the first electrode layer and the first drain insulating layer from top to bottom, the upper surface of described second substrate is disposed with the second electrode lay and the second drain insulating layer from bottom to up, the metal wire running through pixel cell and the packaging plastic sealed by described pixel cell it is additionally provided with between described first substrate and second substrate, described metal wire electrically connects with public electrode.
Further, described first fluid is set to color two kinds different with second fluid.
Further, described second fluid is lighttight conducting solution.
Further, described packaging plastic has hydrophobic oleophilic oil characteristic.
Further, described first electrode layer is a transparency electrode or multiple transparency electrode in rectangular arrangement and TFT switch.
Further, described the second electrode lay is a transparency electrode or multiple transparency electrode in rectangular arrangement and TFT switch.
Further, described transparency electrode is ITO.
Further, described first substrate and second substrate are symmetrical arranged.
Further, the positional symmetry of described first electrode layer and the second electrode lay is arranged.
The invention has the beneficial effects as follows:
If first fluid moves to the first drain insulating layer surface from the second drain insulating layer surface under electrowetting effect, then the color of this device display first fluid; If moving to the second hydrophobic layer surface from the first drain insulating layer surface, then this device presents the color of second fluid; When removing after voltage, image can stable for extended periods of time, reach bi-stable display effects, reduce power consumption. Structure adopts the space being arranged to accommodating first fluid and second fluid at substrate, use packaging plastic to be glued by projection corresponding on substrate and adhesive seal take on independent pixel cell, effectively preventing the display confusion that between pixel cell, the crossfire of fluid causes, stability is better; The present invention has the feature of simple in construction, reliable and stable, low energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of electrowetting bistable electro fluid display device embodiment one of the present invention;
Fig. 2 a is the structural representation of electrowetting bistable electro fluid display device embodiment two of the present invention;
Fig. 2 b is the structural representation of electrowetting bistable electro fluid display device embodiment three of the present invention;
Fig. 2 c is the structural representation of electrowetting bistable electro fluid display device embodiment four of the present invention;
Fig. 3 a to Fig. 3 g is the first fluid in electrowetting bistable electro fluid display device embodiment two of the present invention and second fluid moving process schematic diagram.
Detailed description of the invention
Below with reference to embodiment and accompanying drawing, the technique effect of the design of the present invention, concrete structure and generation is clearly and completely described, to be completely understood by the purpose of the present invention, feature and effect. Obviously; described embodiment is a part of embodiment of the present invention, rather than whole embodiment, based on embodiments of the invention; other embodiments that those skilled in the art obtains under the premise not paying creative work, belong to the scope of protection of the invention. It addition, all connection/annexations related in patent, not singly refer to that component directly connects, and refer to and according to being embodied as situation, by adding or reduce connection auxiliary, more excellent draw bail can be formed. Each technical characteristic in the present invention, can combination of interactions under the premise of not conflicting conflict.
Embodiment one refer to Fig. 1.
Electrowetting bistable electro fluid display device of the present invention includes first substrate 11, second substrate 21, the first fluid 1 of oiliness and with first fluid 1 objectionable intermingling and the second fluid 2 with electric conductivity, formed between first substrate 11 and second substrate 21 for housing first fluid 1 and the pixel cell of second fluid 2, the lower surface of first substrate 11 is disposed with the first electrode layer 12 and the first drain insulating layer 13 from top to bottom, the upper surface of second substrate 21 is disposed with the second electrode lay 22 and the second drain insulating layer 23 from bottom to up, the metal wire 3 running through pixel cell and the packaging plastic 5 sealed by pixel cell it is additionally provided with between first substrate 11 and second substrate 21, metal wire 3 electrically connects with public electrode 4, metal wire 3 and public electrode 4 provide polar voltages for second fluid 2, packaging plastic 5 has hydrophobic oleophilic oil characteristic. if first fluid 1 moves to the first drain insulating layer surface 13 from the second drain insulating layer 23 surface under electrowetting effect, then the color of this device display first fluid 1, if moving to the second drain insulating layer 23 surface from the first drain insulating layer 13 surface, then the color of this device display second fluid 2.
Second substrate 21 is symmetricly set in below first substrate 11, and it is also symmetrical with the groove of first substrate 11 for the groove shapes housing fluid, and the first electrode layer 12 and the second electrode lay 22 are symmetricly set in above-mentioned groove.
First substrate the 11, first drain insulating layer 13 is all printing opacity, for as display surface. First fluid 1 is set to color two kinds different with second fluid 2, color component in first fluid 1 is pigment or dyestuff, it can also be granular substance, it is respectively provided with lipophile, color component in second fluid 2 is pigment or dyestuff, can also being granular substance, be respectively provided with hydrophilic, hydrophilic and oleophylic two kinds of compositions will not mix. For white and black displays scheme, if first fluid 1 is black, second fluid 2 is white, then form white and black displays image.
Second fluid 2 is the lighttight conducting solution of aqueous, such as sodium chloride solution, Klorvess Liquid etc.
First drain insulating layer 13 and the second drain insulating layer 23 are preferably politef or polyethylene terephthalate, for hydrophobic oleophilic oil.
First electrode layer 12 and the second electrode lay 22 can be a transparency electrode or multiple transparency electrode in rectangular arrangement and TFT switch, and transparency electrode is preferably ITO, and electrode adopts membrane electrode or thick membrane electrode.
Embodiment two refer to Fig. 2 a.
With embodiment one, electrowetting bistable electro fluid display device embodiment two of the present invention is distinctive in that pixel cell left side does not plate transparent electrode layer, so when transparency electrode is energized, first fluid will flow along left side, so just can accurately control the motion path of first fluid, make the stability of display be significantly improved.
Embodiment three refer to Fig. 2 b.
With embodiment one, electrowetting bistable electro fluid display device embodiment three of the present invention is distinctive in that pixel cell right edge does not plate transparent electrode layer, so when transparency electrode is energized, first fluid will flow along right edge, in like manner also can promote the stability of display.
Embodiment four refer to Fig. 2 c.
With embodiment one, electrowetting bistable electro fluid display device embodiment two of the present invention is distinctive in that pixel cell is arc-shaped, such first fluid and second fluid are subject to less resistance when moving in pixel cell, it is easier to motion.
Certainly, the shape of pixel cell and the location layout of electrode layer of electrowetting bistable electro fluid display device of the present invention are not limited to above-described embodiment, other are capable of the structure of electrowetting function, shape is all the replacement means that those skilled in the art will be readily apparent, for instance but it is not limited to adopt the pixel cell of the shape such as polygon, ellipse.
Fig. 3 a to Fig. 3 g is the first fluid in electrowetting bistable electro fluid display device embodiment two of the present invention and second fluid moving process schematic diagram.
Please with reference to Fig. 3 a to Fig. 3 g, for first fluid be black, second fluid for white, its bistable display process is described.
Fig. 3 a to Fig. 3 d illustrates that first fluid moves to each kinestate on the first drain insulating layer surface under electrowetting effect from the second drain insulating layer surface. Detailed process is as follows: in Fig. 3 a, under original state, and first fluid is on the second drain insulating layer surface, and now screen is shown as white. In Fig. 3 b, when the second transparent electrode layer energising and metal wire energising, first fluid moves along the left side of pixel cell. In figure, under the effect of electric potential difference, first fluid continues to shrink, and strengthens with the first drain insulating layer contact area. In Fig. 3 d, first fluid and the second drain insulating layer completely disengage from, and are laid in the first drain insulating layer surface, and this timer is shown that black.
Fig. 3 e to Fig. 3 g illustrates that first fluid moves to each kinestate on described second drain insulating layer surface from described first drain insulating layer surface. Detailed process is as follows: in Fig. 3 e, and when the first transparency electrode and metal wire energising, first fluid moves to the left side of pixel cell. In Fig. 3 f, first fluid continues to shrink, and strengthens with the second drain insulating layer contact area. In Fig. 3 g, first fluid moves to the second drain insulating layer, completely disengages from the first drain insulating layer, and now screen is shown as white. After removing voltage, it is motionless that first fluid is still maintained at the second drain insulating layer surface, it is possible to ensures the stability of display.
By the concrete motor process of above example two it can be seen that electrowetting bistable electro fluid display device structure of the present invention is simple, provide convenience for producing, reduce cost and there is the characteristic of high aperture simultaneously. Utilize the hydrophobic oleophilic oil characteristic of drain insulating layer, oil-based liquid is made to fit with drain insulating layer surface in its natural state, add and can complete, by the switching of electrode, the feature that fluid moves back and forth based under electrowetting effect, reach the target of bistable display.
It is above presently preferred embodiments of the present invention has been illustrated, but the present invention is not limited to described embodiment, those of ordinary skill in the art it may also be made that all equivalent variations or replacement under the premise without prejudice to spirit of the present invention, and these equivalent deformation or replacement are all contained in the application claim limited range.
Claims (9)
1. an electrowetting bistable electro fluid display device, including first substrate, second substrate, the first fluid of oiliness and with described first fluid objectionable intermingling and the second fluid with electric conductivity, it is characterized in that: between described first substrate and second substrate, form the pixel cell for housing described first fluid and second fluid, the lower surface of described first substrate is disposed with the first electrode layer and the first drain insulating layer from top to bottom, the upper surface of described second substrate is disposed with the second electrode lay and the second drain insulating layer from bottom to up, the metal wire running through pixel cell and the packaging plastic sealed by described pixel cell it is additionally provided with between described first substrate and second substrate, described metal wire electrically connects with public electrode.
2. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described first fluid is set to color two kinds different with second fluid.
3. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described second fluid is lighttight conducting solution.
4. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described packaging plastic has hydrophobic oleophilic oil characteristic.
5. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described first electrode layer is a transparency electrode or multiple transparency electrode in rectangular arrangement and TFT switch.
6. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described the second electrode lay is a transparency electrode or multiple transparency electrode in rectangular arrangement and TFT switch.
7. the electrowetting bistable electro fluid display device as described in claim 5 or 6, it is characterised in that: described transparency electrode is ITO.
8. electrowetting bistable electro fluid display device as claimed in claim 1, it is characterised in that: described first substrate and second substrate are symmetrical arranged.
9. electrowetting bistable electro fluid display device as claimed in claim 8, it is characterised in that: the positional symmetry of described first electrode layer and the second electrode lay is arranged.
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| CN201610151042.4A CN105676444B (en) | 2016-03-16 | 2016-03-16 | A kind of electrowetting bistable electro fluid display device |
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| CN201610151042.4A CN105676444B (en) | 2016-03-16 | 2016-03-16 | A kind of electrowetting bistable electro fluid display device |
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Cited By (5)
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| CN107170364A (en) * | 2017-07-04 | 2017-09-15 | 厦门天马微电子有限公司 | A kind of special-shaped display panel and display device |
| CN108627969A (en) * | 2018-05-11 | 2018-10-09 | 南京晶奥微光电技术有限公司 | A kind of bistable electro wetting structure and its preparation process |
| CN108987448A (en) * | 2018-07-24 | 2018-12-11 | 京东方科技集团股份有限公司 | Flexible display panels and its manufacturing method, wearable device |
| WO2020007023A1 (en) * | 2018-07-03 | 2020-01-09 | Boe Technology Group Co., Ltd. | Electrowetting display panel, electrowetting display apparatus, method of driving electrowetting display panel, and method of fabricating electrowetting display panel |
| CN114684741A (en) * | 2022-04-20 | 2022-07-01 | 南通市通州区吉安建筑机械有限公司 | Safety protection type lifting machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170364A (en) * | 2017-07-04 | 2017-09-15 | 厦门天马微电子有限公司 | A kind of special-shaped display panel and display device |
| CN108627969A (en) * | 2018-05-11 | 2018-10-09 | 南京晶奥微光电技术有限公司 | A kind of bistable electro wetting structure and its preparation process |
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| WO2020007023A1 (en) * | 2018-07-03 | 2020-01-09 | Boe Technology Group Co., Ltd. | Electrowetting display panel, electrowetting display apparatus, method of driving electrowetting display panel, and method of fabricating electrowetting display panel |
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| CN108987448A (en) * | 2018-07-24 | 2018-12-11 | 京东方科技集团股份有限公司 | Flexible display panels and its manufacturing method, wearable device |
| CN114684741A (en) * | 2022-04-20 | 2022-07-01 | 南通市通州区吉安建筑机械有限公司 | Safety protection type lifting machine |
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