CN103439790A - Electrowetting display device - Google Patents
Electrowetting display device Download PDFInfo
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- CN103439790A CN103439790A CN2013102473611A CN201310247361A CN103439790A CN 103439790 A CN103439790 A CN 103439790A CN 2013102473611 A CN2013102473611 A CN 2013102473611A CN 201310247361 A CN201310247361 A CN 201310247361A CN 103439790 A CN103439790 A CN 103439790A
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- 239000007788 liquid Substances 0.000 claims abstract description 123
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 87
- 239000000758 substrate Substances 0.000 claims abstract description 49
- 230000004888 barrier function Effects 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 230000005684 electric field Effects 0.000 claims description 8
- 238000009736 wetting Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 27
- 230000000694 effects Effects 0.000 description 14
- 230000006870 function Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 6
- 239000003086 colorant Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an electrowetting display device which is provided with a plurality of pixel areas, and each pixel area comprises a pixel peripheral area and an active area. The electrowetting display device comprises a first substrate, a plurality of first electrodes, a hydrophobic layer, a plurality of barrier walls, a second substrate, a plurality of second electrodes, a polar liquid and a non-polar liquid. The first electrode is located on the first substrate. Each second electrode comprises a first sub-electrode part and a second sub-electrode part which are arranged in the corresponding active area and are electrically connected with each other, the first sub-electrode part and the hydrophobic layer have a first distance, the second sub-electrode part and the hydrophobic layer have a second distance, and the first distance is larger than the second distance. The polar liquid and the non-polar liquid are positioned between the second electrode and the hydrophobic layer.
Description
Technical field
The invention relates to a kind of electric moistening display apparatus, espespecially a kind of electric moistening display apparatus with multiple gap.
Background technology
Electric moistening display apparatus is a kind of display device that the movement that utilizes electric wetting power to control non-polar liquid and polar liquid reaches display effect.Electric moistening display apparatus mainly comprises two plate bases, is placed in respectively two electrodes of the inboard of two plate bases, and is arranged between two electrodes and immiscible non-polar liquid and polar liquid each other.The voltage difference put between two electrodes can change the hydrophilic effect of electrode, and then changes contact angle.That is to say, in the situation that do not have voltage difference, the comparatively hydrophobic oleophylic of electrode surface, and after applying voltage difference, electrode surface can become comparatively hydrophilic oleophobic, therefore can control the area that non-polar liquid is covered in substrate, and then reaches the effect of controlling GTG.Yet, in existing electric moistening display apparatus, because the distance of any position between two electrodes is consistent, its electric field produced can be uniform electric field, therefore show on continuity ground that while having the picture of different GTGs, polar liquid and non-polar liquid cognition produce trapping phenomena (Hysteresis phenomenon) because being subject to the impact of other acting force.The area that the non-polar liquid that trapping phenomena can make is actual is covered in substrate and the predetermined area that is covered in substrate be deviation to some extent.Thus, by making the GTG of electric moistening display apparatus perform poor, have a strong impact on display quality.
Summary of the invention
One of purpose of the present invention is to provide a kind of electric moistening display apparatus, the problem of performing poor with the GTG that solves existing electric moistening display apparatus.
One embodiment of the invention provide a kind of electric moistening display apparatus, and it has a plurality of pixel regions, and each pixel region comprises a pixel surrounding zone and an active region.Above-mentioned electric moistening display apparatus comprises a first substrate, a plurality of the first electrode, a hydrophobic layer, a plurality of barrier rib, a second substrate, a plurality of the second electrode, a polar liquid and a non-polar liquid.The first electrode is arranged on first substrate and lays respectively in pixel region.Hydrophobic layer is arranged on the first electrode.Barrier rib is arranged on hydrophobic layer and lays respectively in the pixel surrounding zone.Second substrate and first substrate are in the face of arranging.The second electrode is arranged on second substrate and lays respectively in pixel region.Each second electrode comprises one first sub-electrode section and one second sub-electrode section.Respectively this second electrode is arranged in corresponding active region and is electrically connected to each other, and the first sub-electrode section and hydrophobic layer have one first distance, and the second sub-electrode section and hydrophobic layer have a second distance, and the first distance is greater than second distance.Polar liquid is between the second electrode and hydrophobic layer.Non-polar liquid is between the second electrode and hydrophobic layer.
There are two kinds of different gaps between the second electrode of electric moistening display apparatus of the present invention and the first electrode, can be precisely and effectively control polar liquid and the non-polar liquid position under dark state display mode and bright state display mode, and then improve GTG and show and promote display quality.
The accompanying drawing explanation
The electric moistening display apparatus of the first embodiment that Fig. 1 is the present invention is in the schematic diagram of dark state display mode;
The electric moistening display apparatus of the first embodiment that Fig. 2 is the present invention is in the schematic diagram of bright state display mode;
Fig. 3 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the first embodiment of the present invention;
Fig. 4 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the first embodiment of the present invention;
The electric moistening display apparatus of the second embodiment that Fig. 5 is the present invention is in the schematic diagram of bright state display mode;
The electric moistening display apparatus of the second embodiment that Fig. 6 is the present invention is in the schematic diagram of dark state display mode;
Fig. 7 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the second embodiment of the present invention;
Fig. 8 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the second embodiment of the present invention;
The electric moistening display apparatus of the 3rd embodiment that Fig. 9 is the present invention is in the schematic diagram of bright state display mode;
The electric moistening display apparatus of the 3rd embodiment that Figure 10 is the present invention is in the schematic diagram of dark state display mode;
Figure 11 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the present invention's the 3rd embodiment;
Figure 12 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the present invention's the 3rd embodiment;
[symbol description]
1 electric moistening display apparatus
The 10P pixel region
The 10A active region
10S pixel surrounding zone
12 first substrates
14 first electrodes
16 hydrophobic layers
18 barrier ribs
20 second substrates
22 second electrodes
24 polar liquids
26 non-polar liquids
15 insulation courses
The 10B rim area
28 frame glue
221 first sub-electrode sections
222 second sub-electrode sections
D1 the first distance
The d2 second distance
42 light sources
44 light guide plate
L light
30 inverted structures
1 ' electric moistening display apparatus
222M central electrode section
222A auxiliary electrode section
1 " electric moistening display apparatus
The S1 auxiliary electrode layer
The S2 auxiliary electrode layer
The S3 auxiliary electrode layer
2 electric moistening display apparatus
32 light-shielding patterns
2 ' electric moistening display apparatus
2 " electric moistening display apparatus
3 electric moistening display apparatus
34 wavelength conversion layers
L ' luminous ray
3 ' electric moistening display apparatus
3 " electric moistening display apparatus
Embodiment
For making the general technology person who is familiar with the technical field of the invention can further understand the present invention, hereinafter the spy enumerates the present invention's preferred embodiment, and coordinate appended graphic, describe in detail constitution content of the present invention and the effect wanting to reach.
Please refer to Fig. 1 and Fig. 2.Fig. 1 and Fig. 2 have illustrated the schematic diagram of electric moistening display apparatus of the first embodiment of the present invention, the electric moistening display apparatus that wherein Fig. 1 is the first embodiment is in the schematic diagram of dark state display mode, and the electric moistening display apparatus that Fig. 2 is the first embodiment is in the schematic diagram of bright state display mode.As shown in Figures 1 and 2, the electric moistening display apparatus 1 of the present embodiment has a plurality of pixel region 10P, and each pixel region 10P comprises an active region 10A and a pixel surrounding zone 10S.Active region 10A can provide the zone of demonstration, and pixel surrounding zone 10S is the zone between adjacent active region 10A.Electric moistening display apparatus 1 comprises a first substrate 12, a plurality of the first electrode 14, a hydrophobic layer 16, a plurality of barrier rib 18, a second substrate 20, a plurality of the second electrode 22, a polar liquid 24 and a non-polar liquid 26.First substrate 12 can comprise transparency carrier, and it can be rigid transparency carrier for example glass substrate or quartz base plate, or bendable transparency carrier plastic base for example, but not as limit.The first electrode 14 is arranged on first substrate 12 and lays respectively in pixel region 10P.The first electrode 14 can comprise transparency electrode, and its material can be tin indium oxide (ITO), tin indium oxide (IZO) or other applicable transparent conductive material.The first electrode 14 is pixel electrode, and each first electrode 14 can have independently pixel voltage.Electric moistening display apparatus 1 can be active matrix array display devices or passive-matrix display device, when electric moistening display apparatus 1 is active matrix array display devices, each first electrode 14 can with corresponding active switching element (not shown) for example thin-film transistor element be electrically connected; When electric moistening display apparatus 1 is the passive-matrix display device, each first electrode 14 does not need to be connected with active switching element, and can directly with the signal wire (not shown), be connected.Hydrophobic layer 16 is arranged on the first electrode 14, and the material of hydrophobic layer 16 can be the various materials with hydrophobic property.In addition, electric moistening display apparatus 1 optionally comprises an insulation course 15, be arranged between the first electrode 14 and hydrophobic layer 16, but not as limit.Barrier rib 18 is arranged on hydrophobic layer 16 and lays respectively in the 10S of pixel surrounding zone, and barrier rib 18 is substantially around active region 10A.Barrier rib 18 can be fixed in the surface of hydrophobic layer 16 and contact with hydrophobic layer 16, and barrier rib 18 does not contact with the second electrode 22.The material of barrier rib 18 can be for example photoresistance or other insulating material.Second substrate 20 is faced and is arranged with first substrate 12, and first substrate 12 can utilize the frame glue 28 that is arranged at rim area 10B to be sticked together with second substrate 20.Second substrate 20 can comprise transparency carrier, and its material can be identical with first substrate 12, but not as limit.The second electrode 22 is arranged on second substrate 20.Speak by the book, the first electrode 14 and the second electrode 22 are arranged at respectively on the inner surface of first substrate 12 and second substrate 20.The second electrode 22 lays respectively in pixel region 10P, and the second electrode 22 can be connected to each other.The second electrode 22 is a common electrode, and its each second electrode 22 can have identical common electric voltage, but not as limit.In addition, each second electrode 22 comprises that one first sub-electrode section 221 and one second sub-electrode section 222 are arranged in corresponding active region 10A and are electrically connected to each other.The first sub-electrode section 221 has one first apart from d1 with hydrophobic layer 16, and the second sub-electrode section 222 has a second distance d2 with hydrophobic layer 16, and first is greater than second distance d2 apart from d1.Polar liquid 24 and non-polar liquid 26 are between the second electrode 22 and hydrophobic layer 16, and polar liquid 24 is not dissolved each other each other with non-polar liquid 26, and can be by frame glue 28 involutions between first substrate 12 and second substrate 20.Frame glue 28 can be for example ultraviolet wire frame glue, or other various types of frame glue.In detail, polar liquid 24 is positioned at active region 10A with non-polar liquid 26, wherein polar liquid 24 can be distributed in the space between first substrate 12 and second substrate 20 substantially, and non-polar liquid 26 can be limited in the formed space of barrier rib 18 substantially.Polar liquid 24 has polarity, and it for example can be water or other has the waterborne liquid of polarity, and non-polar liquid 26 does not have polarity, and it can be printing ink or other does not have the oil-based liquid of polarity.In addition, in the present embodiment, polar liquid 24 comprises a light-transmissive fluid, its tolerable light penetration, and non-polar liquid 26 comprises a light tight liquid, it can stop light penetration.
The electric moistening display apparatus 1 of the present embodiment can separately comprise a light source 42 and a light guide plate 44.Light source 42 can be arranged at a side of light guide plate 44, and in order to launch to light L to light guide plate 44, and light guide plate 44 is arranged at the below of first substrate 12, in order to the light L guiding first substrate 12 that light source 42 is launched.In the present embodiment, the light L that light source 42 is launched is luminous ray, that is its wavelength coverage is to be the visible light of human eye.For example, light source 42 can be for example light-emitting component of light-emitting diode, fluorescent tube or other type.In addition, light source 42 also can be arranged at the below of first substrate 12.But also environment for use is backlight for the electric moistening display apparatus 1 of the present embodiment, and do not need to use the back light members such as light source 42 and light guide plate 44 this situation is next.
In the present embodiment, there are two kinds of different gaps between the second electrode 22 and hydrophobic layer 16, the design of this kind of different gap can make the pressure between the first sub-electrode section 221 and hydrophobic layer 16 be not equal to the pressure between the second sub-electrode section 222 and hydrophobic layer 16 under identical voltage difference, the trapping phenomena of polar liquid 24 and non-polar liquid 26 can be effectively avoided thus, and polar liquid 24 and the position of non-polar liquid 26 under dark state display mode and bright state display mode can be controlled accurately.Please refer to formula 1, formula 1 is pressure between the second electrode 22 and hydrophobic layer 16, distance and the relation of voltage difference.
P2-P1=(1/2) * CV2* ((1/d2)-(1/d1)) ... ... ... ... ... ... .. formula 1
Wherein
P1 is the pressure between the first sub-electrode section 221 and hydrophobic layer 16;
P2 is the pressure between the second sub-electrode section 222 and hydrophobic layer 16;
V is the voltage difference between the first electrode 14 and the second electrode 22;
D1 is the first distance; And
D2 is second distance.
From formula 1, in the situation that the first electrode 14 is identical with the voltage difference V between the second electrode 22, see through and change the first magnitude relationship apart from d1 and second distance d2, the i.e. relation of the pressure P 1 between capable of regulating the first sub-electrode section 221 and hydrophobic layer 16 and the pressure P 2 between the second sub-electrode section 222 and hydrophobic layer 16.Thus, when driving electric moistening display apparatus 1, utilize the pressure differential can be more precisely and effectively control polar liquid 24 and non-polar liquid 26 position under dark state display mode and bright state display mode, and improve the GTG performance, and then the enhancement display quality.
The electric moistening display apparatus 1 of the present embodiment separately comprises a plurality of inverted structures 30, lays respectively in active region 10A.Each inverted structure 30 is arranged between corresponding the second sub-electrode section 222 and second substrate 20, but is not arranged between the first sub-electrode section 221 and second substrate 20.Therefore, with respect to the lower surface of the first sub-electrode section 221, the second sub-electrode section 222 can be padded and protrude from the first sub-electrode section 221 by 30 of inverted structures.That is to say, in the present embodiment, between the first sub-electrode section 221 and hydrophobic layer 16, first apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16, by between the second sub-electrode section 222 and second substrate 20, inverted structure 30 being set, reach.The material of inverted structure 30 can be various insulating material, such as inorganic insulating material, similarly is monox, silicon nitride, aluminium oxide and titanium dioxide etc., or organic insulation.
The operating conditions of electric moistening display apparatus under dark state display mode and bright state display mode of the present embodiment hereinafter will be described.What deserves to be explained is, dark state display mode or bright state display mode refer to the display mode of single pixel, that is to say, each pixel visual the picture that shows of wish and be controlled as independently dark state display mode or bright state display mode.
As shown in Figure 1, under dark state display mode, the poor existence of no-voltage between the first electrode 14 and the second electrode 22, that is to say, the pixel voltage of the first electrode 14 can equate with the common electric voltage of the second electrode 22.Under this situation, polar liquid 24 (light-transmissive fluid) can be repelled with hydrophobic layer 16, and non-polar liquid 26 (light tight liquid) can be adsorbed on the surface of hydrophobic layer 16 and cover active region 10A fully, therefore can cover by the light L of light guide plate 44 ejaculations and reach dark state display effect.
As shown in Figure 2, under bright state display mode, have an electric field between the first electrode 14 and the second electrode 22, that is to say, the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 is unequal and have a voltage difference.Under this situation, non-polar liquid 26 (light tight liquid) can be subject to pushing of electric wetting power and move to barrier rib 18 a side and only the part cover active region 10A, and polar liquid 24 (light-transmissive fluid) can because the surface can change and cover part active region 10A.Therefore, the light L (luminous ray) penetrated by light guide plate 44 can reach bright state display effect through polar liquid 24 (light-transmissive fluid).Under bright state display mode, the GTG value (brightness) of each pixel region 10P can utilize the voltage extent of the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 to be controlled, and that is to say, when voltage difference heals when large, the GTG value is larger; When voltage difference more hour, the GTG value is less.In addition, because the pixel voltage of the first electrode 14 of each pixel region 10P is independent control, therefore can demonstrate respectively predetermined GTG value.
The electric moistening display apparatus 1 of the present embodiment can provide white and black displays function, monochromatic Presentation Function or full-color Presentation Function.For example, provide the white and black displays function if want, the light L that light source 42 sends can select white light.Monochromatic Presentation Function is provided if want, and the light L that light source 42 sends can select monochromatic light for example ruddiness, green glow or blue light.Full-color Presentation Function is provided if want, and light source 42 can be selected the scan-type light source, and its light L that can sequentially send different colours for example sequentially sends ruddiness, green glow and blue light; Perhaps, the light L that light source 42 sends can select white light, and the colored filter (not shown) of different colours is set respectively in different pixel region 10P.
Electric moistening display apparatus of the present invention is not limited with above-described embodiment.Hereinafter will sequentially introduce the electric moistening display apparatus of other preferred embodiment of the present invention, and for the ease of relatively deviation the simplified illustration of each embodiment, use in the following embodiments identical symbol to mark identical element, and the deviation mainly for each embodiment describes, and no longer repeating part is repeated.
Please refer to Fig. 3.Fig. 3 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the first embodiment of the present invention.As shown in Figure 3, in the electric moistening display apparatus 1 ' of the first alternate embodiment, each second sub-electrode section 222 comprises a 222M of central electrode section and a 222A of auxiliary electrode section.The 222M of central electrode section of the second sub-electrode section 222 and the first sub-electrode section 221 are consisted of the same layer patterned transparent conductive layer, and the 222A of each auxiliary electrode section is arranged between the corresponding 222M of central electrode section and hydrophobic layer 16.Therefore, with respect to the lower surface of the first sub-electrode section 221, the 222A of auxiliary electrode section can protrude from the first sub-electrode section 221.That is to say, in the first alternate embodiment, between the first sub-electrode section 221 and hydrophobic layer 16, first is that the 222A of auxiliary electrode section by the second sub-electrode section 222 reaches apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16.The dark state display mode of the electric moistening display apparatus 1 ' of the first alternate embodiment is identical with the first embodiment with the mode of operation of bright state display mode, at this, does not add to repeat.
Please refer to Fig. 4.Fig. 4 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the first embodiment of the present invention.As shown in Figure 4, be different from the first alternate embodiment, at the electric moistening display apparatus 1 of the second alternate embodiment " in, the 222A of each auxiliary electrode section comprises a plurality of auxiliary electrode layer S1, S2, and S3, be stacked between the corresponding 222M of central electrode section and hydrophobic layer 16.Auxiliary electrode layer S1, S2, the area difference of S3, for example its area is arranged for the mode of successively decreasing.That is to say, the area of the auxiliary electrode layer S3 of close hydrophobic layer 16 is less than the area of auxiliary electrode layer S2, and the area of auxiliary electrode layer S2 is less than the area near the auxiliary electrode layer S1 of the central electrode 222M of section.Similarly, between the first sub-electrode section 221 and hydrophobic layer 16, first apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16, be to reach by the 222A of auxiliary electrode section with Multilayer stack structure.The electric moistening display apparatus 1 of the second alternate embodiment " dark state display mode identical with the first embodiment with the mode of operation of bright state display mode, at this, do not add to repeat.
Please refer to Fig. 5 and Fig. 6.Fig. 5 and Fig. 6 have illustrated the schematic diagram of electric moistening display apparatus of the second embodiment of the present invention, the electric moistening display apparatus that wherein Fig. 5 is the second embodiment is in the schematic diagram of bright state display mode, and the electric moistening display apparatus that Fig. 6 is the second embodiment is in the schematic diagram of dark state display mode.As shown in Fig. 5 and Fig. 6, be different from the first embodiment, the electric moistening display apparatus 2 of the present embodiment separately comprises a plurality of light-shielding patterns 32, be arranged at respectively in active region 10, and each light-shielding pattern 32 only partly covers corresponding active region 10A and part exposes corresponding active region 10A.Light-shielding pattern 32 can stop light L, and in addition, the light L that light source 42 sends can be invisible ray.In addition, be different from the first embodiment, in a second embodiment, polar liquid 24 comprises a light-transmissive fluid, and non-polar liquid 26 comprises a wavelength conversion liquid, wherein the refractive index of non-polar liquid 26 is more than or equal to the refractive index of hydrophobic layer 16, and the refractive index of polar liquid 24 is less than the refractive index of hydrophobic layer 16.For example, the refringence of non-polar liquid 26 and hydrophobic layer 16 can be between 0.1 to 1, but not as limit.In addition, in the present embodiment, between the first sub-electrode section 221 and hydrophobic layer 16, first is to reach by between the second sub-electrode section 222 and second substrate 20, inverted structure 30 being set apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16, but not as limit.
As shown in Figure 5, under bright state display mode, the poor existence of no-voltage between the first electrode 14 and the second electrode 22, that is to say, the pixel voltage of the first electrode 14 can equate with the common electric voltage of the second electrode 22.Under this situation, polar liquid 24 (light-transmissive fluid) can be repelled with hydrophobic layer 16, and non-polar liquid 26 (wavelength conversion liquid) can be adsorbed on the surface of hydrophobic layer 16 and cover active region 10A fully.Because the refractive index of non-polar liquid 26 is more than or equal to the refractive index of hydrophobic layer 16, therefore light L can enter and penetrate non-polar liquid 26 (wavelength conversion liquid) with the form that directly penetrates or reflect, and excitation wavelength is changed liquid and is formed a luminous ray L ', and because non-polar liquid 26 is curved surface with the interface of polar liquid 24, so luminous ray L ' penetrable polar liquid 24 and reach bright state display effect still.For example, the pixel region 10P of the electric moistening display apparatus 2 of the present embodiment can comprise the pixel region 10P of a plurality of different colours, for example red pixel district, green pixel district and blue pixel district, and in red pixel district, green pixel district and blue pixel district, color wavelength conversion liquid is respectively emitting red light liquid, green emitting liquid and blue-light-emitting liquid, therefore can provide full-color Presentation Function.In addition, under bright state display mode, the GTG value (brightness) of each pixel region 10P can utilize the voltage extent of the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 to be controlled, and that is to say, when voltage difference heals when large, the GTG value is less; When voltage difference more hour, the GTG value is larger.In addition, because the pixel voltage of the first electrode 14 of each pixel region 10P is independent control, therefore can demonstrate respectively predetermined GTG value.
As shown in Figure 6, under dark state display mode, have an electric field between the first electrode 14 and the second electrode 22, that is to say, the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 is unequal and have a voltage difference.Under this situation, non-polar liquid 26 (wavelength conversion liquid) can be subject to the extruding of electric wetting power and move on light-shielding pattern 32, and polar liquid 24 (light-transmissive fluid) is understood the cover part active region 10A because of the change of surface energy.Polar liquid 24 (light-transmissive fluid) can stop light L and dark state display effect is provided.In the present embodiment, because the refractive index of polar liquid 24 is less than the refractive index of hydrophobic layer 16, so light L (invisible ray) meeting of being penetrated by light guide plate 44 is because total reflection effect be reflected and can't be penetrated polar liquid 24 (light-transmissive fluid) by polar liquid 24 (light-transmissive fluid).That is to say, under dark state display mode, light L (invisible ray) not only can't penetrate light-shielding pattern 32, also because of total reflection effect, can't penetrate polar liquid 24 (light-transmissive fluid), and therefore excitation wavelength is not changed liquid and can be reached non-luminous dark state display effect.
Please refer to Fig. 7.Fig. 7 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the second embodiment of the present invention.As shown in Figure 7, in the electric moistening display apparatus 2 ' of the first alternate embodiment, each second sub-electrode section 222 comprises a 222M of central electrode section and a 222A of auxiliary electrode section.The 222M of central electrode section of the second sub-electrode section 222 and the first sub-electrode section 221 are consisted of the same layer patterned transparent conductive layer, and the 222A of each auxiliary electrode section is arranged between the corresponding 222M of central electrode section and hydrophobic layer 16.Therefore, with respect to the lower surface of the first sub-electrode section 221, the 222A of auxiliary electrode section can protrude from the first sub-electrode section 221.That is to say, in the first alternate embodiment, between the first sub-electrode section 221 and hydrophobic layer 16, first is that the 222A of auxiliary electrode section by the second sub-electrode section 222 reaches apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16.The dark state display mode of the first alternate embodiment electric moistening display apparatus 2 ' is identical with the second embodiment with the mode of operation of bright state display mode, at this, does not add to repeat.
Please refer to Fig. 8.Fig. 8 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the second embodiment of the present invention.As shown in Figure 8, be different from the first alternate embodiment, at the electric moistening display apparatus 2 of the second alternate embodiment " in, the 222A of each auxiliary electrode section comprises a plurality of auxiliary electrode layer S1, S2, and S3, be stacked between the corresponding 222M of central electrode section and hydrophobic layer 16.Auxiliary electrode layer S1, S2, the area difference of S3, for example its area is arranged for the mode of successively decreasing.That is to say, the area of the auxiliary electrode layer S3 of close hydrophobic layer 16 is less than the area of auxiliary electrode layer S2, and the area of auxiliary electrode layer S2 is less than the area near the auxiliary electrode layer S1 of the central electrode 222M of section.Similarly, between the first sub-electrode section 221 and hydrophobic layer 16, first apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16, be to reach by the 222A of auxiliary electrode section with Multilayer stack structure.The electric moistening display apparatus 2 of the second alternate embodiment " dark state display mode identical with the second embodiment with the mode of operation of bright state display mode, at this, do not add to repeat.
Please refer to Fig. 9 and Figure 10.Fig. 9 and Figure 10 have illustrated the schematic diagram of electric moistening display apparatus of the present invention's the 3rd embodiment, the electric moistening display apparatus that wherein Fig. 9 is the 3rd embodiment is in the schematic diagram of bright state display mode, and the electric moistening display apparatus that Figure 10 is the 3rd embodiment is in the schematic diagram of dark state display mode.As shown in Fig. 9 and Figure 10, be different from first and second embodiment, the electric moistening display apparatus 3 of the present embodiment comprises a wavelength conversion layer 34, is arranged on second substrate 20.In addition, the light L that light source 42 sends can be invisible ray, polar liquid 24 comprises light-transmissive fluid, and non-polar liquid 26 comprises light-transmissive fluid, wherein the refractive index of non-polar liquid 26 is more than or equal to the refractive index of hydrophobic layer 16, and the refractive index of polar liquid 24 is less than the refractive index of hydrophobic layer 16.For example, the refringence of non-polar liquid 26 and hydrophobic layer 16 can be between 0.1 to 1, but not as limit.
As shown in Figure 9, under bright state display mode, the poor existence of no-voltage between the first electrode 14 and the second electrode 22, that is to say, the pixel voltage of the first electrode 14 can equate with the common electric voltage of the second electrode 22.Under this situation, polar liquid 24 can be repelled with hydrophobic layer 16, and non-polar liquid 26 can be adsorbed on the surface of hydrophobic layer 16 and cover active region 10A fully, because the refractive index of non-polar liquid 26 is more than or equal to the refractive index of hydrophobic layer 16, therefore light L can enter and penetrate non-polar liquid 26 (light-transmissive fluid) with the form that directly penetrates or reflect, and because non-polar liquid 26 is curved surface with the interface of polar liquid 24, therefore still penetrable polar liquid 24 excitation wavelength conversion layer 34 and form a luminous ray L ' of luminous ray L ', reach bright state display effect.The pixel region 10P of the electric moistening display apparatus 3 of the present embodiment can comprise the pixel region 10P of a plurality of different colours, for example red pixel district, green pixel district and blue pixel district, and in red pixel district, green pixel district and blue pixel district, wavelength conversion layer 34 can be selected the wavelength conversion layer of different materials, for example red light luminescent layer, green luminescence layer and blue light-emitting, it can be subject to exciting of invisible ray respectively and produce ruddiness, green glow and blue light, therefore can provide full-color Presentation Function.In addition, in an alternate embodiment, the light L that light source 42 sends also can be the luminous ray with short wavelength, for example blue light.Under this situation, the blue pixel district can not arrange wavelength conversion layer 34, and in red pixel district and green pixel district and blue pixel district, wavelength conversion layer 34 can be selected the wavelength conversion layer of different materials, for example red light luminescent layer and green luminescence layer, it can be subject to respectively short wavelength's exciting of blue light and produce ruddiness and green glow.By the above-mentioned practice, can provide full-color Presentation Function equally.In addition, under bright state display mode, the GTG value (brightness) of each pixel region 10P can utilize the voltage extent of the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 to be controlled, that is to say, when voltage difference more hour, the GTG value is larger; When voltage difference heals when large, the GTG value is less.In addition, because the pixel voltage of the first electrode 14 of each pixel region 10P is independent control, therefore can demonstrate respectively predetermined GTG value.
As shown in figure 10, under dark state display mode, have an electric field between the first electrode 14 and the second electrode 22, that is to say, the common electric voltage of the pixel voltage of the first electrode 14 and the second electrode 22 is unequal and have a voltage difference.Under this situation, non-polar liquid 26 can be subject to pushing of electric wetting power and move to barrier rib 18 a side and only part cover active region 10A, and polar liquid 24 can because surface can change and cover part active region 10A.Polar liquid 24 can stop light L and dark state display effect is provided.In the present embodiment, because the refractive index of polar liquid 24 is less than the refractive index of hydrophobic layer 16, so the light L meeting of being penetrated by light guide plate 44 is because total reflection effect be reflected by polar liquid 24 and can't be penetrated polar liquid 24.
Please refer to Figure 11.Figure 11 has illustrated the schematic diagram of electric moistening display apparatus of the first alternate embodiment of the present invention's the 3rd embodiment.As shown in figure 11, in the electric moistening display apparatus 3 ' of the first alternate embodiment, each second sub-electrode section 222 comprises a 222M of central electrode section and a 222A of auxiliary electrode section.The 222M of central electrode section of the second sub-electrode section 222 and the first sub-electrode section 221 are consisted of the same layer patterned transparent conductive layer, and the 222A of each auxiliary electrode section is arranged between the corresponding 222M of central electrode section and hydrophobic layer 16.Therefore, with respect to the lower surface of the first sub-electrode section 221, the 222A of auxiliary electrode section can protrude from the first sub-electrode section 221.That is to say, in the first alternate embodiment, between the first sub-electrode section 221 and hydrophobic layer 16, first reaches by the 222A of auxiliary electrode section of the second sub-electrode section 222 apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16.The dark state display mode of the electric moistening display apparatus 3 ' of the first alternate embodiment is identical with the 3rd embodiment with the mode of operation of bright state display mode, at this, does not add to repeat.
Please refer to Figure 12.Figure 12 has illustrated the schematic diagram of electric moistening display apparatus of the second alternate embodiment of the present invention's the 3rd embodiment.As shown in Figure 4, be different from the first alternate embodiment, at the electric moistening display apparatus 3 of the second alternate embodiment " in, the 222A of each auxiliary electrode section comprises a plurality of auxiliary electrode layer S1, S2, and S3, be stacked between the corresponding 222M of central electrode section and hydrophobic layer 16.Auxiliary electrode layer S1, S2, the area difference of S3, for example its area is arranged for the mode of successively decreasing.That is to say, the area of the auxiliary electrode layer S3 of close hydrophobic layer 16 is less than the area of auxiliary electrode layer S2, and the area of auxiliary electrode layer S2 is less than the area near the auxiliary electrode layer S1 of the central electrode 222M of section.Similarly, between the first sub-electrode section 221 and hydrophobic layer 16, first apart from the second distance d2 between d1 and the second sub-electrode section 222 and hydrophobic layer 16, be to reach by the 222A of auxiliary electrode section with Multilayer stack structure.The electric moistening display apparatus 3 of the second alternate embodiment " dark state display mode identical with the 3rd embodiment with the mode of operation of bright state display mode, at this, do not add to repeat.
In sum, there are two kinds of different gaps between the second electrode of electric moistening display apparatus of the present invention and the first electrode, therefore can be precisely and effectively control polar liquid and the non-polar liquid position under secretly state display mode and bright state display mode, and improve the GTG performance, and then promote display quality.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to Russia of the present invention covering scope.
Claims (17)
1. an electric moistening display apparatus, have a plurality of pixel regions, and respectively this pixel region comprises a pixel surrounding zone and an active region, and this electric moistening display apparatus comprises:
One first substrate;
A plurality of the first electrodes, be arranged on this first substrate and lay respectively in these pixel regions;
One hydrophobic layer, be arranged on these first electrodes;
A plurality of barrier ribs, be arranged on this hydrophobic layer and lay respectively in these pixel surrounding zones;
One second substrate, face and arrange with this first substrate;
A plurality of the second electrodes, be arranged on this second substrate and lay respectively in these pixel regions, wherein respectively this second electrode comprises one first sub-electrode section and one second sub-electrode section, respectively this second electrode is arranged in this corresponding active region and is electrically connected to each other, this the first sub-electrode section and this hydrophobic layer have one first distance, this the second sub-electrode section and this hydrophobic layer have a second distance, and this first distance is greater than this second distance;
One polar liquid, between these second electrodes and this hydrophobic layer; And
One non-polar liquid, between these second electrodes and this hydrophobic layer.
2. electric moistening display apparatus as claimed in claim 1, is characterized in that, these second electrodes are connected to each other.
3. electric moistening display apparatus as claimed in claim 1, separately comprise an insulation course, is arranged between these first electrodes and this hydrophobic layer.
4. electric moistening display apparatus as claimed in claim 1, separately comprise a plurality of inverted structures, lay respectively in these active regions, wherein respectively this inverted structure is arranged between corresponding this second sub-electrode section and this second substrate, so that this second sub-electrode section protrudes from this first sub-electrode section.
5. electric moistening display apparatus as claimed in claim 1, it is characterized in that, respectively this second sub-electrode section comprises a central electrode section and an auxiliary electrode section, these central electrode sections and these the first sub-electrode sections are consisted of the same layer patterned transparent conductive layer, and respectively this auxiliary electrode section is arranged between corresponding this central electrode section and this hydrophobic layer, and this auxiliary electrode section protrudes from this first sub-electrode section.
6. electric moistening display apparatus as claimed in claim 5, it is characterized in that, respectively this auxiliary electrode section comprises a plurality of auxiliary electrode layers, be stacked between corresponding this central electrode section and this hydrophobic layer, and the area of this auxiliary electrode layer of close this hydrophobic layer is less than the area near this auxiliary electrode layer of this central electrode section.
7. electric moistening display apparatus as claimed in claim 1, is characterized in that, separately comprises:
One light source, in order to launch a light; And
One light guide plate, be arranged at the below of this first substrate, in order to this light that this light source is launched this first substrate that leads.
8. electric moistening display apparatus as claimed in claim 7, is characterized in that, this light comprises a luminous ray.
9. electric moistening display apparatus as claimed in claim 8, is characterized in that, this polar liquid comprises a light-transmissive fluid, and this non-polar liquid comprises a light tight liquid.
10. electric moistening display apparatus as claimed in claim 9, is characterized in that,
Under a dark state display mode, the poor existence of no-voltage between this first electrode and this second electrode, and this non-polar liquid covers this active region fully, to cover this light penetrated by this light guide plate; And
Under a bright state display mode, there is an electric field between this first electrode and this second electrode, and this non-polar liquid be subject to pushing of electric wetting power and move to this barrier rib a side and only part cover this active region so that this luminous ray penetrated by this light guide plate is through this polar liquid.
11. electric moistening display apparatus as claimed in claim 7, is characterized in that, this light comprises an invisible ray.
12. electric moistening display apparatus as claimed in claim 11, it is characterized in that, separately comprise a plurality of light-shielding patterns, be arranged at respectively in these active regions, wherein respectively this light-shielding pattern only partly covers this corresponding active region, and this non-polar liquid comprises a wavelength conversion liquid.
13. electric moistening display apparatus as claimed in claim 12, is characterized in that, the refractive index of this non-polar liquid is more than or equal to the refractive index of this hydrophobic layer, and the refractive index of this polar liquid is less than the refractive index of this hydrophobic layer.
14. electric moistening display apparatus as claimed in claim 12, is characterized in that,
Under a bright state display mode, the poor existence of no-voltage between this first electrode and this second electrode, and this non-polar liquid covers this active region fully, so that this invisible ray penetrated by this light guide plate enters this non-polar liquid and excites this non-polar liquid and form a luminous ray; And
Under a dark state display mode, there is an electric field between this first electrode and this second electrode, and this non-polar liquid is subject to pushing of electric wetting power and moves on this light-shielding pattern, so that this invisible ray penetrated by this light guide plate is stopped by this polar liquid.
15. electric moistening display apparatus as claimed in claim 11, is characterized in that, separately comprises a wavelength conversion layer, is arranged on this second substrate, wherein this polar liquid comprises a light-transmissive fluid, and this non-polar liquid comprises a light-transmissive fluid.
16. electric moistening display apparatus as claimed in claim 15, is characterized in that, the refractive index of this non-polar liquid is more than or equal to the refractive index of this hydrophobic layer, and the refractive index of this polar liquid is less than the refractive index of this hydrophobic layer.
17. electric moistening display apparatus as claimed in claim 15, is characterized in that,
Under a bright state display mode, the poor existence of no-voltage between this first electrode and this second electrode, and this non-polar liquid system covers this active region fully, so that this invisible ray penetrated by this light guide plate is through this non-polar liquid and excite this wavelength conversion layer and form a luminous ray; And
Under a dark state display mode, there is an electric field between this first electrode and this second electrode, this polar liquid is subject to pushing of electric wetting power and partly covers this active region, to cover this invisible ray penetrated by this light guide plate.
Applications Claiming Priority (2)
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| TW102112774 | 2013-04-10 | ||
| TW102112774A TWI460470B (en) | 2013-04-10 | 2013-04-10 | Electrowetting display device |
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| CN103439790A true CN103439790A (en) | 2013-12-11 |
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| CN103809283A (en) * | 2014-02-12 | 2014-05-21 | 北京京东方显示技术有限公司 | Optical grating, display device and manufacturing method of optical grating |
| CN104330891A (en) * | 2014-10-22 | 2015-02-04 | 深圳市华星光电技术有限公司 | Electrowetting display panel and electrowetting display device |
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| CN110161675A (en) * | 2019-05-08 | 2019-08-23 | 华南师范大学 | A kind of electric moistening display part and preparation method thereof based on conductive column |
| CN110187584A (en) * | 2018-12-25 | 2019-08-30 | 友达光电股份有限公司 | Display panel and its operating method |
| US10859886B2 (en) | 2015-03-11 | 2020-12-08 | Boe Technology Group Co., Ltd. | Display panel, display apparatus and method of manufacturing display panel |
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Also Published As
| Publication number | Publication date |
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| TWI460470B (en) | 2014-11-11 |
| TW201439588A (en) | 2014-10-16 |
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