CN101452114A - Electrowetting display device - Google Patents
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- CN101452114A CN101452114A CNA200710196128XA CN200710196128A CN101452114A CN 101452114 A CN101452114 A CN 101452114A CN A200710196128X A CNA200710196128X A CN A200710196128XA CN 200710196128 A CN200710196128 A CN 200710196128A CN 101452114 A CN101452114 A CN 101452114A
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Abstract
The present invention provides an electric wetting display device which comprises a first substrate and a second substrate that are oppositely installed. A transparent polar solution layer and a non-transparent non-polar solution layer are clamped therein and are not compatible. A first transparent electrode layer is installed on the first substrate. A second transparent electrode layer is installed on a second substrate. A dielectric layer is installed on the second transparent electrode layer. A reflecting board structure is installed between the second transparent electrode layer and the second substrate for defining a reflecting area and a transparent area. A backlight plate is installed below the second substrate. When an operating voltage is exerted to the electric wetting display device, the non-transparent non-polar solution layer coheres, and simultaneously the reflecting area and transmitting area which have same area are exposed.
Description
Technical field
The present invention relates to a kind of display equipment, be particularly to a kind of Electrowetting display device.
Background technology
The principle of Electrowetting display (Electrowetting Display) is to utilize wetting (Electrowetting) phenomenon of electricity or electrochemical kapillary (Electrocapillary) phenomenon.When fluid is subjected to electric field action and changes the surface free energy (Free Surface Energy) of fluid, make the fluid distribution area change.
United States Patent (USP) US discloses a kind of Electrowetting display structure for 6,967, No. 763, and it is poly-to utilize opaque non-polar liquid to be subjected in electric field electricity wetting (Electrowetting) effect, with the bright attitude and the dark attitude of control display picture element.Figure 1A and 1B show that respectively traditional Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage in voltage.See also Figure 1A, traditional colored electroweting type display 10 comprises a substrate 16, and patterning pixel electrode 15 is arranged on the substrate 16.One dielectric layer (tool hydrophobic surface character) 14 is arranged on the patterning pixel electrode 15.The water wettability shelves wall construction 13 of patterning is arranged on the dielectric layer 14, defines each pixel region.The opaque non-polar liquid 12 and the transparent polar liquid 11 that contain black dyes are arranged in each pixel region.When the operating voltage off status, opaque non-polar liquid 12 is uniformly distributed in the pixel, and this moment, the show state of pixel was dark attitude (dark state).
When operating voltage is opened state, opaque non-polar liquid 12 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards interior poly-away from pixel electrode 15, thereby exposes most pixel region, this moment, the show state of pixel was bright attitude (bright state), shown in Figure 1B.
The partly anti-colorize Electrowetting display of wearing of tradition is to utilize the black oil droplet as light absorbing medium, and the collocation color filter, by the baffle reflection external light source, or sends light source with backlight.Light source sees through color filter to external environment, to reach the effect that colorize shows.Yet, because partly counter echo area and the transmission area mis-arrange of wearing the colorize Electrowetting display of tradition, cause GTG control to be difficult for and problem accurately not, and then influence display image stability and quality.
WIPO's application case discloses the colored electroweting type display structure that WO discloses a kind of half-inversed type for No. 2006/017129, in anti-structure of wearing the electroweting type color monitor partly, infrabasal plate and the upper substrate of having colored filter are organized upright encapsulation, and insert polar solvent and black non-polar solution in inside.The partly counter colored electroweting type display of wearing form has a plurality of pixels, and on infrabasal plate, makes a transmission area and an echo area in the individual pixel.
Fig. 2 A and 2B show that respectively traditional half-inversed type Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage in voltage.See also Fig. 2 A, traditional half-inversed type colored electroweting type display 20 comprises one first substrate 21 and the 29 subtend settings of one second substrate, inserts and puts a transparent polar solution layer 23 and an opaque non-polar solution layer 24 therebetween.One first transparent electrode layer 22 is arranged on first substrate 21.One second transparent electrode layer 27 is arranged on second substrate 29.One dielectric layer (tool hydrophobic surface character) 26 is arranged on second transparent electrode layer 27.One reflecting plate 28 is arranged between second transparent electrode layer 27 and second substrate 29, to define a reflector space and a regional transmission.One backlight 35 is arranged at the back side of second substrate 29.One power supply unit 30 is bestowed one and is biased between first transparent electrode layer 22 and second transparent electrode layer 27, by electric wetting (Electrowetting) acting force that bias voltage causes, controls the reflector space and the regional transmission video picture of each pixel.When impressed voltage greater than operating voltage, therefore poly-state can manifest reflector space and regional transmission, fully shown in Fig. 2 A in opaque non-polar liquid 24 was fully.
When impressed voltage during greater than starting potential but less than operating voltage, opaque non-polar liquid 24 is not poly-in fully, and therefore the reflector space area that manifests is greater than the regional transmission area, causes GTG control to be difficult for and problem accurately not, shown in Fig. 2 B.
Below the show state in traditional half-inversed type Electrowetting display each stage of impressed voltage of explanation sees also Fig. 3 A, and traditional half-inversed type Electrowetting display 100a comprises a substrate 137, and patterning transparent pixels electrode layer 135 is arranged on the substrate 137.One reflecting plate 136 is arranged between transparent pixels electrode layer 135 and the substrate 137, to define a reflector space and a regional transmission.One dielectric layer (tool hydrophobic surface character) 134 is arranged at transparent pixels electrode layer 135.The water wettability shelves wall construction 133 of patterning is arranged on the dielectric layer 134, defines each pixel region.The opaque non-polar liquid 132 and the transparent polar liquid 131 that contain black dyes are arranged in each pixel region.Backlight 138 is arranged at the back side of substrate 137.One subtend substrate, 140 subtends are arranged at substrate 137, one transparency electrodes 142 (common electrode) and are arranged on the subtend substrate 140.When the operating voltage off status, opaque non-polar liquid 132 is uniformly distributed in the pixel, and extraneous incident ray is absorbed by opaque non-polar liquid 132 fully, and this moment, the show state of pixel was dark attitude (dark state).
When impressed voltage is slightly larger than starting potential, poly-in opaque non-polar liquid 132 beginnings, the reflector space of exposed portions serve, this moment is the incident ray L of part only
1Reflection, the show state of pixel is for reflection, shown in Fig. 3 B.When impressed voltage increased to greater than starting potential but less than operating voltage, opaque non-polar liquid was further interior poly-, and the reflector space area that exposes is greater than the regional transmission area, shown in Fig. 3 C.When impressed voltage greater than operating voltage, therefore poly-state can manifest reflector space and regional transmission, fully shown in Fig. 3 D in opaque non-polar liquid 132 was fully.
Tradition half-inversed type Electrowetting display is along with impressed voltage increases, firstly appear out from reflector space, expose again regional transmission can cause this display out of doors with the state of indoor varying environment light source under its GTG control deviation be difficult for, and then influence the image stability and the quality of display.
Summary of the invention
The embodiment of the invention provides a kind of structure and method for making of Electrowetting display, by the reflecting plate that patterning is set, improves the GTG control and contrast of the regional transmission and the reflector space of Electrowetting display, promotes the image stability and the quality of display.
The invention provides a kind of Electrowetting display device, comprising: one first substrate and one second substrate subtend are provided with, and insert and put a transparent polar solution layer and an opaque non-polar solution layer therebetween; One first transparent electrode layer is arranged on this first substrate; One second transparent electrode layer is arranged on this second substrate; One dielectric layer is arranged on this second transparent electrode layer; One reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define a reflector space and a regional transmission; One backlight is arranged under this second substrate; Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
The present invention provides a kind of Electrowetting display device in addition, comprising: one first substrate and one second substrate subtend are provided with, and insert and put a transparent polar solution layer and an opaque non-polar solution layer therebetween; One first transparent electrode layer is arranged on this first substrate; One second transparent electrode layer is arranged on this second substrate; One dielectric layer is arranged on this second transparent electrode layer; One patterning reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define a plurality of reflector spaces and a plurality of regional transmission in a pixel region; One backlight is arranged under this second substrate; Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
The present invention provides a kind of Electrowetting display device in addition, comprising: one first substrate and one second substrate subtend are provided with, and insert and put a transparent polar solution layer and an opaque non-polar solution layer therebetween; One first transparent electrode layer is arranged on this first substrate; One patterning, second transparent electrode layer is arranged on this second substrate, and wherein, this patterning second transparent electrode layer is arranged at the two ends of a pixel region; One dielectric layer is arranged on this second transparent electrode layer; One reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define a reflector space and a regional transmission; One backlight is arranged under this second substrate; Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
For the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A and 1B show that respectively traditional Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage in voltage;
Fig. 2 A and 2B show that respectively traditional half-inversed type Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage in voltage;
Fig. 3 A-3D shows the show state in traditional half-inversed type Electrowetting display each stage of impressed voltage respectively;
Fig. 4 A-4D shows that half-inversed type Electrowetting display according to one embodiment of the invention is in the show state in different each stage of impressed voltage;
Fig. 5 A-5C shows the pixel according to the half-inversed type Electrowetting display of the embodiment of the invention, in the vertical view of the show state in different each stage of impressed voltage;
Fig. 6 A-6C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage;
Fig. 7 A-7C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage;
Fig. 8 A-8C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage; And
Fig. 9 A-9C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage.
Description of reference numerals
Existing part (Fig. 1～3D)
10～traditional Electrowetting display; 11～transparent polar liquid;
12～opaque non-polar liquid; 13～water wettability shelves wall construction;
14～dielectric layer; 15～pixel electrode;
16～substrate;
20～traditional half-inversed type Electrowetting display;
21～the first substrates; 22～transparency electrode;
23～transparent polar solution layer; 24～opaque non-polar solution layer;
25～water wettability shelves wall construction; 26～dielectric layer;
27～pixel electrode layer; 28～reflecting plate;
29～the second substrates; 30～power supply unit;
35～backlight;
100a～traditional half-inversed type Electrowetting display;
131～transparent polar liquid; 132～opaque non-polar liquid;
133～water wettability shelves wall construction; 134～dielectric layer;
135～pixel electrode layer; 136～reflecting plate;
137～substrate; 138～backlight;
140～subtend substrate; 142～transparency electrode;
L
1～incident ray; L
R～reflection ray.
This case part (Fig. 4 A～9C)
200a～traditional half-inversed type Electrowetting display;
241～transparent polar liquid; 242～opaque non-polar liquid;
243 water wettability shelves wall constructions; 244～dielectric layer;
245～pixel electrode layer; 246～reflecting plate;
247～substrate; 248～backlight;
250～subtend substrate; 252～transparency electrode;
L
1～incident ray; L
R～reflection ray;
310a, 310b, 310c, 310d, 310e～pixel region;
351～opaque non-polar liquid; 352～water wettability shelves wall construction;
353a, 353b, 353c, 353d～regional transmission;
354a, 354b, 354c, 354d～reflector space;
354～boundary line;
The interior poly-direction of R～opaque non-polar liquid.
Embodiment
Below with each embodiment and be accompanied by the example of graphic explanation, as reference frame of the present invention.In graphic or instructions were described, similar or identical part was all used identical figure number.And in graphic, the shape of embodiment or thickness can enlarge, and to simplify or convenient the sign.Moreover, the part of each element will be to describe explanation respectively in graphic, it should be noted that, the element that does not illustrate among the figure or describe, be the form known to the technical staff in the technical field, in addition, only for disclosing the ad hoc fashion that the present invention uses, it is not in order to limit the present invention to certain embodiments.
The Electrowetting display device of the embodiment of the invention is to change the surface nature of fluid as the medium that manifests pixel with electric field.More particularly, in anti-structure of wearing the electroweting type color monitor partly, on infrabasal plate corresponding to echo area and the transmission area of making array tool periodic arrangement in the individual pixel of colored filter, compartmentalization design by reflecting plate, promote partly anti-GTG control of wearing colored electroweting type display, and then promote image stability and quality.
Fig. 4 A-4D shows the show state according to half-inversed type Electrowetting display each stage of impressed voltage of one embodiment of the invention.See also Fig. 4 A, half-inversed type Electrowetting display 200a comprises one first substrate 250 and the 247 subtend settings of one second substrate, inserts and puts a transparent polar solution layer 241 and an opaque non-polar solution layer 242 therebetween, does not dissolve each other to each other.One transparency electrode 252 (common electrode) is arranged on first substrate 250, and the material of transparent electrode layer 252 can comprise tin indium oxide (ITO) or indium zinc oxide (IZO), and on the whole its thickness range is 0.1～1 micron (μ m).
The pixel electrode layer 245 that one patterning is transparent is arranged on second substrate 247.Pixel electrode layer 245 is a pattern structure, and it comprises rectangle, square, triangle, circle, trapezoidal or oval.The material of pixel electrode layer 245 can comprise tin indium oxide (ITO) or indium zinc oxide (IZO), and on the whole its thickness range is 0.1～1 micron (μ m).The reflection board structure 246 of one-period property patterning is arranged between transparent pixels electrode layer 245 and the substrate 247, with reflector space and the regional transmission that defines a plurality of periodic arrangement.Reflection board structure 246 can be a pattern structure, and it comprises a plurality of reflecting plates, the corresponding secondary reflection zone (sub-reflection region) of each reflecting plate.Perhaps, this reflection board structure 246 can comprise a plurality of periodicity reflecting plates, the corresponding secondary reflection zone of each reflecting plate.Or reflection board structure 246 can be a pattern structure, and it comprises at least one reflecting plate, the corresponding boundary line of this reflecting plate with this regional transmission, and wherein the interior poly-direction of this opaque non-polar solution layer is parallel with this boundary line.The material of reflection board structure can comprise Al, Ag or MoW, and its shape comprises rectangle, square, circle, triangle, trapezoidal or oval.
One dielectric layer (tool hydrophobic surface character) 244 is arranged at transparent pixels electrode layer 245.According to one embodiment of the invention, dielectric layer 244 has a hydrophobic surface, and directly is arranged on the pixel electrode layer 245.The material of dielectric layer 244 comprises Parylene (parylene), monox (SiO
x), silicon nitride (SiN
x), poly-difluoroethylene (poly (vinyldiene fluoride)), lead zirconate titanate (PZT) or barium strontium (BST), and on the whole its thickness range is 0.1～1 micron (μ m).Perhaps, a hydrophobic material layer (not illustrating) is arranged on this dielectric layer, makes it have hydrophobic surface.The material of this hydrophobic material layer comprises the hydrophobic polymer of fluorinated, and on the whole its thickness range is 0.1～1 micron (μ m).
The water wettability shelves wall construction 243 of patterning is arranged on the dielectric layer 244, define each pixel region, the material of this water wettability barrier wall structure 243 comprises hydrophilic photoresist, and on the whole its thickness range is 5～10 microns (μ m), and the opaque non-polar liquid layer 242 and the transparent polar liquid layer 241 that contain black dyes are arranged in each pixel region.The material of transparent polar solvent layer 241 comprises water, sodium-chloride water solution or potassium chloride solution, and on the whole its thickness range is 30～250 microns (μ m); The material of opaque non-polar solution layer 242 comprises decane (decane), dodecane (dodecane) or the tetradecane (tetradecane), on the whole its thickness range is 1～10 micron (μ m), perhaps, opaque non-polar solution layer 241 comprises black dyes (dye) or black pigment (pigment).Backlight 248 is arranged at the back side of substrate 247.
When operating voltage was off status, opaque non-polar liquid 242 was uniformly distributed in the pixel, and extraneous incident ray is absorbed by opaque non-polar liquid 242 fully, and this moment, the show state of pixel was dark attitude (dark state).
When impressed voltage is slightly larger than starting potential, gather in opaque non-polar liquid 242 beginnings, expose the reflector space and the regional transmission of same section, at this moment the incident ray L of part
IReflection L
R, the part transmitted light is also arranged from backlight 248 transmission regional transmissions, shown in Fig. 4 B.When impressed voltage increased to greater than starting potential but less than operating voltage, opaque non-polar liquid was further interior poly-, exposed the reflector space and the regional transmission of same section, shown in Fig. 4 C.When impressed voltage greater than operating voltage, therefore poly-state can manifest reflector space and regional transmission, fully shown in Fig. 4 D in opaque non-polar liquid 242 was fully.According to the embodiment of the invention, under any driving voltage state, all expose the reflector space and the regional transmission of same section, thereby make the reflective-mode of Electrowetting display consistent with contrast, promote display image stability and quality with the GTG control of transmission mode.
Fig. 5 A-5C shows the dot structure according to the half-inversed type Electrowetting display of the embodiment of the invention, in the vertical view of the show state in different each stage of impressed voltage.The water wettability shelves wall construction 352 of patterning defines pixel region 310a, and the reflection board structure of periodic patternsization is the structure of one-period sexual intercourse mistake, defines the regional transmission 353a and the reflector space 354a of a plurality of periodic arrangement.Transparent pixel electrode (not illustrating) is arranged at pixel region 310a one side (right side).See also Fig. 5 A, when operating voltage was off status, opaque non-polar liquid 351 was uniformly distributed among the pixel region 310a, and extraneous incident ray is absorbed by opaque non-polar liquid 351 fully, and this moment, the show state of pixel was dark attitude (darkstate).
See also Fig. 5 B, when impressed voltage increases to greater than starting potential but less than operating voltage, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards away from poly-in the direction R of transparent pixel electrode, therefore manifest regional transmission 353a of the same area and reflector space 354a.
See also Fig. 5 C, when impressed voltage during greater than operating voltage, opaque non-polar liquid 351 is subjected to electricity wetting (Electrowetting) acting force poly-in fully, therefore manifests regional transmission 353a and reflector space 354a fully.
Fig. 6 A-6C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage.The water wettability shelves wall construction 352 of patterning defines pixel region 310b, and the reflection board structure of periodic patternsization is the structure of one-period sexual intercourse mistake, defines the regional transmission 353a and the reflector space 354a of a plurality of periodic arrangement.The pixel electrode of patterning (not illustrating) is arranged at pixel region 310b middle position.See also Fig. 6 A, when operating voltage was off status, opaque non-polar liquid 351 was uniformly distributed among the pixel region 310b, and extraneous incident ray is absorbed by opaque non-polar liquid 351 fully, and this moment, the show state of pixel was dark attitude (dark state).
See also Fig. 6 B, when impressed voltage increases to greater than starting potential but less than operating voltage, because of the pixel electrode (not illustrating) of patterning is arranged at pixel region 310b middle position, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, in the two side direction R of pixel region 310b, gather, therefore manifest pixel middle position regional transmission 353a of the same area and reflector space 354a.
See also Fig. 6 C, when impressed voltage during greater than operating voltage, opaque non-polar liquid 351 is subjected to electricity wetting (Electrowetting) acting force, and is interior fully poly-towards the two side direction R of pixel region 310b, therefore manifests regional transmission 353a and reflector space 354a fully.
Fig. 7 A-7C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage.The water wettability shelves wall construction 352 of patterning defines pixel region 310c, and a reflection board structure defines a regional transmission 353b and a reflector space 354b, and wherein regional transmission 353b and reflector space 354b are arranged above and below, between a boundary line 354 is arranged.Transparent pixel electrode (not illustrating) is arranged at pixel region 310c one side (right side).See also Fig. 7 A, when operating voltage was off status, opaque non-polar liquid 351 was uniformly distributed among the pixel region 310c, and extraneous incident ray is absorbed by opaque non-polar liquid 351 fully, and this moment, the show state of pixel was dark attitude (dark state).
See also Fig. 7 B, when impressed voltage increases to greater than starting potential but less than operating voltage, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards away from poly-in the direction of transparent pixel electrode, therefore manifest regional transmission 353b of the same area and reflector space 354b.The interior poly-direction R of opaque non-polar liquid 351 is parallel with boundary line 354.
See also Fig. 7 C, when impressed voltage during greater than operating voltage, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards interior fully poly-away from the direction R of transparent pixel electrode, therefore manifests regional transmission 353b and reflector space 354b fully.
Fig. 8 A-8C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage.The water wettability shelves wall construction 352 of patterning defines pixel region 310d, and reflection board structure is arranged at pixel region 310d one side (right side), defines a regional transmission 353c and reflector space 354c.Transparent pixel electrode (not illustrating) is arranged at the both sides of pixel region 310d, and the middle position of pixel region 310b is electrodeless.See also Fig. 8 A, when operating voltage was off status, opaque non-polar liquid 351 was uniformly distributed among the pixel region 310d, and extraneous incident ray is absorbed by opaque non-polar liquid 351 fully, and this moment, the show state of pixel was dark attitude (dark state).
See also Fig. 8 B, when impressed voltage increases to greater than starting potential but less than operating voltage, be arranged at two side positions of pixel region 310d because of the pixel electrode (not illustrating) of patterning, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, poly-in the direction R of the middle position of pixel region 310d, therefore manifest the both sides regional transmission 353c of the same area and the reflector space 354c of pixel.
See also Fig. 8 C, when impressed voltage during greater than operating voltage, opaque non-polar liquid 351 is subjected to electricity wetting (Electrowetting) acting force, and is poly-in fully towards the direction R of the middle position of pixel region 310d, therefore manifests regional transmission 353c and reflector space 354c fully.
Fig. 9 A-9C shows a dot structure of half-inversed type Electrowetting display according to another embodiment of the present invention, in the vertical view of the show state in different each stage of impressed voltage.The water wettability shelves wall construction 352 of patterning defines pixel region 310e, and a reflection board structure defines a regional transmission 353d and a reflector space 354d, wherein arrange about regional transmission 353d and reflector space 354d, between a boundary line 354 is arranged.Transparent pixel electrode (not illustrating) is arranged at pixel region 310e one side (upside).See also Fig. 9 A, when operating voltage was off status, opaque non-polar liquid 351 was uniformly distributed among the pixel region 310e, and extraneous incident ray is absorbed by opaque non-polar liquid 351 fully, and this moment, the show state of pixel was dark attitude (dark state).
See also Fig. 9 B, when impressed voltage increases to greater than starting potential but less than operating voltage, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards away from poly-in the direction R of transparent pixel electrode, therefore manifest regional transmission 353d of the same area and reflector space 354d.The interior poly-direction R of opaque non-polar liquid 351 is parallel with boundary line 354.
See also Fig. 9 C, when impressed voltage during greater than operating voltage, opaque non-polar liquid 351 is subjected to the influence of electricity wetting (Electrowetting) acting force, towards interior fully poly-away from the direction of transparent pixel electrode, therefore manifests regional transmission 353d and reflector space 354d fully.
Though the present invention discloses as above with embodiment; so it is not in order to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the appending claims person of defining.
Claims (30)
1. Electrowetting display device comprises:
First substrate and second substrate that subtend is provided with insert and put transparent polar solution layer and opaque non-polar solution layer therebetween;
First transparent electrode layer is arranged on this first substrate;
Second transparent electrode layer is arranged on this second substrate;
Dielectric layer is arranged on this second transparent electrode layer;
Reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define reflector space and regional transmission;
Backlight is arranged under this second substrate;
Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
2. Electrowetting display device as claimed in claim 1, wherein this second transparent electrode layer is a pattern structure, comprises rectangle, square, triangle, circle, trapezoidal or oval.
3. Electrowetting display device as claimed in claim 1, wherein this dielectric layer has hydrophobic surface, and directly is arranged on this second transparent electrode layer.
4. Electrowetting display device as claimed in claim 1 more comprises the hydrophobic material layer that is arranged on this dielectric layer.
5. Electrowetting display device as claimed in claim 4 more comprises the water wettability barrier wall structure that is arranged on this hydrophobic material layer, to define pixel region.
6. Electrowetting display device as claimed in claim 1, wherein the material of this first transparent electrode layer comprises tin indium oxide or indium zinc oxide.
7. Electrowetting display device as claimed in claim 1, wherein on the whole the thickness range of this first transparent electrode layer is 0.1～1 micron.
8. Electrowetting display device as claimed in claim 1, wherein the material of this second transparent electrode layer comprises tin indium oxide or indium zinc oxide.
9. Electrowetting display device as claimed in claim 1, wherein on the whole the thickness range of this second transparent electrode layer is 0.1～1 micron.
10. Electrowetting display device as claimed in claim 1, wherein the material of this dielectric layer comprises Parylene, monox, silicon nitride, poly-difluoroethylene, lead zirconate titanate or barium strontium.
11. Electrowetting display device as claimed in claim 1, wherein on the whole the thickness range of this dielectric layer is 0.1～1 micron.
12. Electrowetting display device as claimed in claim 4, wherein the material of this hydrophobic material layer comprises the hydrophobic polymer of fluorinated.
13. Electrowetting display device as claimed in claim 4, wherein on the whole the thickness range of this hydrophobic material layer is 0.1～1 micron.
14. Electrowetting display device as claimed in claim 5, wherein the material of this water wettability barrier wall structure comprises hydrophilic photoresist.
15. Electrowetting display device as claimed in claim 5, wherein on the whole the thickness range of this water wettability barrier wall structure is 5～10 microns.
16. Electrowetting display device as claimed in claim 1, wherein the material of this transparent polar solution layer comprises water, sodium-chloride water solution or potassium chloride solution.
17. Electrowetting display device as claimed in claim 1, wherein on the whole the thickness range of this transparent polar solution layer is 30～250 microns.
18. Electrowetting display device as claimed in claim 1, wherein the material of this opaque non-polar solution layer comprises decane, dodecane or the tetradecane.
19. Electrowetting display device as claimed in claim 1, wherein on the whole the thickness range of this opaque non-polar solution layer is 1～10 micron.
20. Electrowetting display device as claimed in claim 1, wherein this opaque non-polar solution layer comprises black dyes or black pigment.
21. Electrowetting display device as claimed in claim 1, wherein this reflection board structure is a pattern structure, and it comprises a plurality of reflecting plates, the corresponding secondary reflection zone of each reflecting plate.
22. Electrowetting display device as claimed in claim 1, wherein this reflection board structure comprises a plurality of periodicity reflecting plates, the corresponding secondary reflection zone of each reflecting plate.
23. Electrowetting display device as claimed in claim 1, wherein this reflection board structure is a pattern structure, it comprises at least one reflecting plate, this reflecting plate and the corresponding boundary line of this regional transmission, and wherein the interior poly-direction of this opaque non-polar solution layer is parallel in fact with this boundary line.
24. Electrowetting display device as claimed in claim 1, wherein this reflection board structure is a pattern structure, it comprises at least one reflecting plate, this reflecting plate and the corresponding boundary line of this regional transmission, and wherein the interior poly-direction of this opaque non-polar solution layer is vertical in fact with this boundary line.
25. Electrowetting display device as claimed in claim 1, wherein the material of this reflection board structure comprises Al, Ag or MoW.
26. Electrowetting display device as claimed in claim 1, wherein this reflection board structure is a pattern structure, and its shape comprises rectangle, square, circle, triangle, trapezoidal or oval.
27. an Electrowetting display device comprises:
First substrate and second substrate that subtend is provided with insert and put transparent polar solution layer and opaque non-polar solution layer therebetween;
First transparent electrode layer is arranged on this first substrate;
Second transparent electrode layer is arranged on this second substrate;
Dielectric layer is arranged on this second transparent electrode layer;
The patterning reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define a plurality of reflector spaces of equal area and a plurality of regional transmission in pixel region;
Backlight is arranged under this second substrate;
Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
28. Electrowetting display device as claimed in claim 27, wherein this patterning reflection board structure is a plurality of periodicity reflection board structures.
29. Electrowetting display device as claimed in claim 27 wherein has the boundary line between this reflector space and this regional transmission, wherein the direction of gathering in this opaque non-polar solution layer is parallel in fact with this boundary line.
30. an Electrowetting display device comprises:
First substrate and second substrate that subtend is provided with insert and put transparent polar solution layer and opaque non-therebetween
The polar solvent layer;
First transparent electrode layer is arranged on this first substrate;
Patterning second transparent electrode layer is arranged on this second substrate, and wherein, this patterning second transparent electrode layer is arranged at the two ends of pixel region;
Dielectric layer is arranged on this second transparent electrode layer;
Reflection board structure is arranged between this second transparent electrode layer and this second substrate, to define reflector space and regional transmission;
Backlight is arranged under this second substrate;
Wherein when applying operating voltage, this opaque non-polar solution layer is interior poly-, and exposes this reflector space and this regional transmission of homalographic simultaneously.
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| CN200710196128XA CN101452114B (en) | 2007-11-28 | 2007-11-28 | Electrowetting display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710196128XA CN101452114B (en) | 2007-11-28 | 2007-11-28 | Electrowetting display device |
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| CN101452114A true CN101452114A (en) | 2009-06-10 |
| CN101452114B CN101452114B (en) | 2010-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN (1) | CN101452114B (en) |
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