CN101833216A - Electrophoretic display panel and device - Google Patents
Electrophoretic display panel and device Download PDFInfo
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- CN101833216A CN101833216A CN200910128738A CN200910128738A CN101833216A CN 101833216 A CN101833216 A CN 101833216A CN 200910128738 A CN200910128738 A CN 200910128738A CN 200910128738 A CN200910128738 A CN 200910128738A CN 101833216 A CN101833216 A CN 101833216A
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Abstract
The invention discloses an electrophoretic display panel comprising a transparent substrate, a first electrode, a transparent partition wall, a plurality of display media and a plurality of reflecting structures, wherein the first electrode is located on the transparent substrate; the transparent partition wall is located on the first electrode to define a plurality of microcup structures on the first electrode; the display media are respectively filled in each microcup structure and each display medium is provided with a plurality of coloring particles; and each reflecting structure is located in the projection direction of the transparent partition wall on the transparent substrate. Furthermore, the invention also provides an electrophoretic display device. The electrophoretic display panel and the electrophoretic display device can be used in any illumination environment and have the advantages of maintaining display brightness and saving electricity.
Description
Technical field
The invention relates to a kind of display panel and display device, and particularly relevant for a kind of electrophoretic display panel and electrophoretic display apparatus.
Background technology
In the development flat-panel screens, characteristic lighter for having, thinner and deflection is the target that following display is mainly pursued always on the market, and electrophoretic display device (EPD) is a kind of display that gets most of the attention wherein.
The method for making of conventional electrophoretic display device is to form a transparent electrode layer and a curtain wall structure earlier to define a plurality of little cup structures on substrate, again display medium is inserted in little cup structure and formed a plurality of unit of display born of the same parents, wherein have fluid and a plurality of white particles of black in the display medium.Form protective seam and adhesive coating in regular turn in the top of little cup structure then, with respect to a side of protective seam active elements array substrates is set in adhesive coating more afterwards, so that two substrates is fitted.When each pixel electrode of active component array baseplate and the electric field between the transparent electrode layer changed, white particles just can move up or down according to direction of an electric field, and then makes each pixel The corresponding area present black or white.
Above-mentioned electrophoretic display apparatus many with front light-source (front light) or external light source as light source, the user observes the viewing area by front light-source or external light source and presents black or white.Yet when electrophoretic display apparatus used under the comparatively not enough indoor environment of light intensity, the user can feel that the shown image of electrophoretic display apparatus is difficult for identification.Otherwise under outdoor environment, the user is the shown image of identification reflective liquid-crystal display easily, and owing to need not use backlight, expends unnecessary electric power so electrophoretic display apparatus uses under the situation at this kind.From the above, electrophoretic display apparatus also can't be useful under any lighting environment simultaneously.Therefore, how properly to design the electrophoretic display apparatus inner structure, so that electrophoretic display apparatus can be kept display brightness when using under indoor environment, and when using down, outdoor environment can reach the effect of power saving, real problem for demanding urgently overcoming before the electrophoretic display apparatus universalness.
Summary of the invention
The invention provides a kind of electrophoretic display panel, it can keep display brightness under any lighting environment uses.
The invention provides a kind of electrophoretic display apparatus, it can be according to the light intensity of surround lighting modulation from the backlight outgoing, thereby have the function of better display quality and power saving.
The present invention proposes a kind of electrophoretic display panel, and it comprises transparency carrier, first electrode, transparent partition wall, a plurality of display medium and a plurality of reflection configuration.First electrode is positioned on the transparency carrier.Transparent partition wall is positioned on first electrode, to define a plurality of little cup structures on first electrode.Display medium fills in respectively in each little cup structure, and has a plurality of toners in each display medium.Each reflection configuration is positioned at transparent partition wall on the projecting direction of transparency carrier.
In one embodiment of this invention, above-mentioned electrophoretic display panel more comprises a backlight, and display medium is between transparency carrier and backlight.
In one embodiment of this invention, each above-mentioned display medium comprises fluid and toner.Wherein, the fluid in the display medium has different colours respectively.
In one embodiment of this invention, above-mentioned transparency carrier for example is bendable substrate.
The present invention proposes a kind of electrophoretic display apparatus, and it comprises electrophoretic display panel, active elements array substrates, backlight and optical sensor.Electrophoretic display panel comprises transparency carrier, transparent partition wall, first electrode, a plurality of display medium and a plurality of reflection configuration.Transparent partition wall is positioned on the transparency carrier, to define a plurality of little cup structures on transparency carrier.First electrode is between transparency carrier and transparent partition wall.Display medium fills in respectively in each little cup structure, and has a plurality of toners in each display medium.Each reflection configuration is positioned at transparent partition wall on the projecting direction of transparency carrier, and reflection configuration is between transparency carrier and transparent partition wall.Active elements array substrates has a plurality of second electrodes, and display medium is between second electrode and first electrode.Active elements array substrates is between electrophoretic display panel and backlight, and reflection configuration is positioned on the travel path of the light that backlight provides.Optical sensor electrically connects backlight, and optical sensor is suitable for the surround lighting of sensing from a side incident of electrophoretic display panel, and modulation is from the light intensity of backlight outgoing.
Because electrophoretic display panel of the present invention has and can reflect the reflection configuration of the light of surround lighting dorsad, therefore electrophoretic display panel of the present invention can utilize dorsad the light of surround lighting to keep display brightness when ambient light intensity descends.Moreover, electrophoretic display apparatus of the present invention have can be according to surround lighting the optical sensor of modulation backlight light intensity, the above-mentioned reflection configuration of arranging in pairs or groups can allow electrophoretic display apparatus use under lighting environment, makes electrophoretic display apparatus show the image that image quality is good and reaches the function of power saving.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the diagrammatic cross-section according to the electrophoretic display panel of first embodiment of the invention.
Fig. 2 is the diagrammatic cross-section of the electrophoretic display panel of another embodiment of the present invention.
Fig. 3 and Fig. 4 are the diagrammatic cross-sections according to the electrophoretic display apparatus of second embodiment of the invention.
The main element symbol description:
100: electrophoretic display panel; 110: transparency carrier;
120: the first electrodes; 122: little cup structure;
130: transparent partition wall; 140: display medium;
150: reflection configuration; 142: toner;
150B: pyramid bottom surface; 150C: the pyramid conical surface;
152: protrusion; 160: protective seam;
170: adhesion layer; 180: backlight;
190: the second electrodes; 190A: second electrode;
190B: second electrode; 300: electrophoretic display apparatus;
310: active elements array substrates; 320: optical sensor;
330: controller; L: surround lighting;
L1: light; S: sensing signal
Embodiment
First embodiment
Fig. 1 is the diagrammatic cross-section according to the electrophoretic display panel of first embodiment of the invention.Please refer to Fig. 1, the electrophoretic display panel 100 of present embodiment is made of transparency carrier 110, first electrode 120, transparent partition wall 130, a plurality of display medium 140 and a plurality of reflection configuration 150, wherein transparency carrier 110 for example is bendable substrate, but the present invention is not as limit.First electrode 120 is positioned on the transparency carrier 110.Transparent partition wall 130 is positioned on first electrode 120, for example is little cup structure 122 of arrayed to define a plurality of on first electrode 120.Display medium 140 fills in respectively in each little cup structure 122, and each display medium 140 has a plurality of toners 142, wherein toner 142 can move according to the direction of an electric field that is applied, and then makes each display medium 140 The corresponding area present different colors.Each reflection configuration 150 is positioned at transparent partition wall 130 on the projecting direction of transparency carrier 110.As shown in Figure 1, electrophoretic display panel 100 can be on transparent partition wall 130 and display medium 140 optionally protective mulch 160 and adhesion layer 170.
What deserves to be mentioned is, the reflection configuration 150 of present embodiment for example is between the transparent partition wall 130 and first electrode 120, certainly, reflection configuration 150 also can be between the transparency carrier 110 and first electrode 120, the present invention does not limit the position of reflection configuration 150 in electrophoretic display panel 100 midship section directions, its visual product category and processing procedure and be arranged in arbitrary rete on the projecting direction of transparent partition wall 130.And, because each reflection configuration 150 is positioned at transparent partition wall 130 on the projecting direction of transparency carrier 110, therefore reflection configuration 150 of the present invention is suitable for utilizing the light L1 from the subtend incident of transparency carrier 110, it is reflexed on the display medium 140 of contiguous transparency carrier 110, making can be via transparent partition wall 130 and reflection configuration 150 and toward the direction transmission of transparency carrier 110, strengthen the observer in the brightness than the image of being watched by transparency carrier 110 sides under the dark situation from the light L1 of electrophoretic display panel 100 rear side.
As shown in Figure 1, the deviser can be in response to product demand further be provided with backlight 180 in the subtend that display medium 140 is positioned at transparency carrier 110, and makes display medium 140 between transparency carrier 110 and backlight 180.Thus, the light L1 that reflection configuration 150 of the present invention can utilize backlight 180 to be provided, and reflection ray L1 projected on the display medium 140, and then the viewed image brilliance of enhancing observer, in other words, when electrophoretic display panel 100 is in the darker indoor environment of illumination intensity, display medium 140 can be kept certain image by presenting brightness from 150 reflection ray L1 of reflection configuration, has successfully overcome the problem that can utilize image brilliance deficiency under the very limited use situation of surround lighting.
Hold above-mentioned, arrayed for example is to drive by first electrode 120 and the second different electrodes respectively in transparency carrier 110 display mediums 140, so that the toner 142 in the display medium 140 can demonstrate the preferable image of discrimination power respectively under different voltage differences.Specifically, display medium 140 and for example is made up of color different fluid 144 and toner 142 in each display medium 140 between first electrode 120 and second electrode 190, for example black fluid and white particles.As shown in Figure 1, fluid 144 is filled in the space of little cup structure 122, and 142 of toners are scattered in this fluid 144.When having a voltage difference between second electrode 190 and first electrode 120, toner 142 can move with respect to fluid 144 according to direction of an electric field, with the quantity of the toner 142 that changes in each display medium 140 contiguous transparency carrier 110, and then make each display medium 140 present black or white.
For example, owing to be positioned at the second electrode 190A on Fig. 1 right side and first electrode, 120 formed directions of an electric field and be direction towards first electrode 120, therefore the toner 142 in the pairing display medium of the second electrode 190A is arranged in a side of fluid 144 contiguous first electrodes 120, thereby presents the image of white.In like manner, in the present embodiment, owing to be positioned at the second electrode 190B in Fig. 1 left side and first electrode, 120 formed directions of an electric field and be direction towards the second electrode 190B, therefore the toner 142 of the pairing display medium of the second electrode 190B (being arranged in the display medium of left side and central authorities among Fig. 1) is arranged in the side of the fluid 144 contiguous second electrode 190B, thereby presents the image of black.
In previous example, reflection configuration 150 for example has a plurality of protrusions 152 towards a side of protective seam 160, and these protrusions 152 can be assisted the effect of reflection configuration 150 reflection ray L1.Fig. 2 is the diagrammatic cross-section of the electrophoretic display panel of another embodiment of the present invention.Please refer to Fig. 2, the shape of the reflection configuration 150 in the electrophoretic display panel 200 of present embodiment can be a pyramid, as the pyrometric cone that is illustrated among the figure, wherein the bottom surface 150B of pyramid and transparency carrier 110 adjacency, at least the conical surface 150C of pyramid is in fact towards display medium 140, so, the pyramid conical surface 150C towards display medium 140 can promote light L 1 utilization factor that can utilize light source.What deserves to be mentioned is, can select suitable pyramid shape for use, and suitably adjust the conical surface 150C of pyramid and the angle of inclination between the 150B of bottom surface according to reflection configuration 150 to the distance between the display medium 140 and the quantity of adjacent display medium 140.
Certainly, in other embodiments, the shape of reflection configuration 150 also can be a circular cone, and the bottom surface of circular cone and transparency carrier adjacency, the conical surface of circular cone is in fact towards display medium 140, and the present invention is not in order to limit the shape of reflection configuration 150.And, on practice, the material of reflection configuration 150 can be selected from the material with high reflectance and make, with metal material, can enumerate chromium, aluminium, silver, above-mentioned alloy or other metals, certainly reflection configuration 150 can also be selected other materials with high reflectance for use, and the present invention is not as limit.
Second embodiment
Fig. 3 and Fig. 4 are the diagrammatic cross-sections according to the electrophoretic display apparatus of second embodiment of the invention.Please be simultaneously with reference to Fig. 3 and Fig. 4, the electrophoretic display apparatus 300 of present embodiment is a kind of application of the electrophoretic display panel 100 (Fig. 1 and Fig. 2) of first embodiment, compared to first embodiment, the electrophoretic display apparatus 300 of present embodiment also comprises active elements array substrates 310, backlight 180 and optical sensor 320.Wherein, active elements array substrates 310 is between electrophoretic display panel 100 and backlight 180, and reflection configuration 150 is positioned on the travel path of the light L1 that backlight 180 provided.And optical sensor 320 for example is to electrically connect backlight 180 by a controller 330, and optical sensor 320 is suitable for the surround lighting L of sensing from a side incident of electrophoretic display panel 100, and modulation is from the light L1 of backlight 180 outgoing intensity.
Particularly, optical sensor 320 for example is a side that is disposed at contiguous transparency carrier 110, in order to detect from the surround lighting L of a side incident of electrophoretic display panel 100, so that electrophoretic display apparatus 300 can be under varying environment respectively modulation backlight 180 go out light intensity, and the more consistent image of display brightness, and reach the effect of power saving simultaneously.Specifically, when electrophoretic display apparatus 300 is in outdoor environment or other environment that throws light on comparatively strong, electrophoretic display apparatus 300 can make full use of surround lighting L as observing light source, to reach the purpose of watching image, at this moment, optical sensor 320 can be with sensing signal S input controller 330, and this controller 330 is in the output intensity of modulation backlight 180, and backlight 180 is in battery saving mode and reduces the intensity of exporting light L1.When electrophoretic display apparatus 300 was in the comparatively soft environment of indoor environment or other illumination, because available surround lighting L ten minutes is limited, optical sensor 320 can be feedback sensing signal backlight 180, to strengthen the light intensity that of backlight 180.These light L1 from backlight 180 reflex on the display medium 140 via reflection configuration 150, and project observer's eyes.Therefore, the user observes brightness and keeps certain image under the situation of surround lighting L illumination deficiency.
In above-mentioned example, active elements array substrates 310 has the pixel of a plurality of arrayed, and has corresponding pixel electrode in each pixel, in the present embodiment, pixel electrode can be played the part of the role as second electrode 190 among first embodiment, pixel electrode makes the pairing display medium 140 of pixel electrode produce the display effect of different color, colourity because of the voltage difference size in order to form voltage difference with first electrode 120.But, the structure that the present invention does not limit active elements array substrates 310 must be like this, anticipate promptly, active elements array substrates 310 in the electrophoretic display device (EPD) and backlight 180 can also use the organic electric-excitation luminescent array base palte of autoluminescence form to substitute, in the hope of obtaining thinner display quality.
In sum, electrophoretic display panel of the present invention and electrophoretic display apparatus have following advantage at least:
Therefore 1. electrophoretic display panel of the present invention has can reflect the reflection configuration of the light of surround lighting dorsad, and electrophoretic display panel of the present invention can utilize dorsad the light of surround lighting to keep display brightness when ambient light intensity descends.
2. electrophoretic display apparatus of the present invention combines optical sensor that can sense ambient light and the reflection configuration that can utilize backlight light, therefore electrophoretic display apparatus of the present invention not only can reduce the light intensity that of backlight in response to outdoor brighter lighting environment, reaches the function of power saving.And can heighten the light intensity that of backlight in response to indoor darker lighting environment, make full use of the light of backlight, reduce brightness, better display quality is provided with the fluctuation that surround lighting changes by reflection configuration.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification 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 modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (10)
1. electrophoretic display panel comprises:
One transparency carrier;
One first electrode is positioned on this transparency carrier;
One transparent partition wall is positioned on this first electrode, to define a plurality of little cup structures on this first electrode;
A plurality of display mediums fill in respectively in each little cup structure, and have a plurality of toners in each display medium; And
A plurality of reflection configurations, wherein each reflection configuration is positioned at this transparent partition wall on the projecting direction of this transparency carrier.
2. electrophoretic display panel as claimed in claim 1 is characterized in that, more comprises a protective seam, covers this transparent partition wall and those display mediums.
3. electrophoretic display panel as claimed in claim 1 is characterized in that, those reflection configurations are between this transparent partition wall and this first electrode.
4. electrophoretic display panel as claimed in claim 1, it is characterized in that, more comprise a plurality of second electrodes, wherein those display mediums are between this first electrode and those second electrodes, when having a voltage difference between those second electrodes and this first electrode, those toners move with respect to this display medium of correspondence, to change the quantity of those toners of contiguous this transparency carrier in this display medium respectively.
5. electrophoretic display panel as claimed in claim 1 is characterized in that, more comprises a backlight, and those display mediums are between this transparency carrier and this backlight.
6. electrophoretic display panel as claimed in claim 1 is characterized in that, each display medium comprises a fluid and those toners.
7. electrophoretic display panel as claimed in claim 1 is characterized in that, those reflection configurations have a plurality of protrusions towards a side of this protective seam.
8. electrophoretic display panel as claimed in claim 1, it is characterized in that, the shape of those reflection configurations comprises pyramid, circular cone, the bottom surface of pyramid and this transparency carrier adjacency, and the conical surface at least of pyramid is in fact towards those display mediums, and the bottom surface of circular cone and this transparency carrier adjacency, and the conical surface of circular cone is in fact towards those display mediums.
9. electrophoretic display apparatus comprises:
One electrophoretic display panel comprises:
One transparency carrier;
One transparent partition wall is positioned on this transparency carrier, to define a plurality of little cup structures on this transparency carrier;
One first electrode is between this transparency carrier and this transparent partition wall;
A plurality of display mediums fill in respectively in each little cup structure, and have a plurality of toners in each display medium;
A plurality of reflection configurations, wherein each reflection configuration is positioned at this transparent partition wall on the projecting direction of this transparency carrier, and this reflection configuration is between this transparency carrier and this transparent partition wall;
One active elements array substrates has a plurality of second electrodes, and those display mediums are between those second electrodes and this first electrode;
One backlight, wherein this active elements array substrates is between this electrophoretic display panel and this backlight, and those reflection configurations are positioned on the travel path of the light that this backlight provides; And
One optical sensor electrically connects this backlight, and this optical sensor is suitable for the surround lighting of sensing from a side incident of this electrophoretic display panel, and modulation is from the light intensity of this backlight outgoing.
10. electrophoretic display apparatus as claimed in claim 9 is characterized in that, more comprises a protective seam, between those second electrodes and this first electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128738A CN101833216A (en) | 2009-03-13 | 2009-03-13 | Electrophoretic display panel and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128738A CN101833216A (en) | 2009-03-13 | 2009-03-13 | Electrophoretic display panel and device |
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| CN101833216A true CN101833216A (en) | 2010-09-15 |
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| CN200910128738A Pending CN101833216A (en) | 2009-03-13 | 2009-03-13 | Electrophoretic display panel and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445807A (en) * | 2010-10-13 | 2012-05-09 | 乐金显示有限公司 | Electrophoretic display device and method for manufacturing the same |
| CN102608821A (en) * | 2011-01-19 | 2012-07-25 | 精工爱普生株式会社 | Electrophoretic display device and electronic apparatus |
| CN103547529A (en) * | 2011-03-11 | 2014-01-29 | 高通Mems科技公司 | Treatment of a self-assembled monolayer on a dielectric layer for improved epoxy adhesion |
| CN103969907A (en) * | 2013-02-05 | 2014-08-06 | 辉达公司 | Display panel and tablet electronic equipment with same |
| CN109073952A (en) * | 2016-05-23 | 2018-12-21 | 清墨显示股份有限责任公司 | Mixed reflection-transmitting image display |
-
2009
- 2009-03-13 CN CN200910128738A patent/CN101833216A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445807A (en) * | 2010-10-13 | 2012-05-09 | 乐金显示有限公司 | Electrophoretic display device and method for manufacturing the same |
| CN102445807B (en) * | 2010-10-13 | 2014-12-24 | 乐金显示有限公司 | Electrophoretic display device and method for manufacturing the same |
| CN102608821A (en) * | 2011-01-19 | 2012-07-25 | 精工爱普生株式会社 | Electrophoretic display device and electronic apparatus |
| CN102608821B (en) * | 2011-01-19 | 2016-08-03 | 精工爱普生株式会社 | Electrophoretic display apparatus and electronic equipment |
| CN103547529A (en) * | 2011-03-11 | 2014-01-29 | 高通Mems科技公司 | Treatment of a self-assembled monolayer on a dielectric layer for improved epoxy adhesion |
| US9085457B2 (en) | 2011-03-11 | 2015-07-21 | Qualcomm Mems Technologies, Inc. | Treatment of a self-assembled monolayer on a dielectric layer for improved epoxy adhesion |
| CN103547529B (en) * | 2011-03-11 | 2015-11-25 | 高通Mems科技公司 | For the epoxy resin improved adheres to the process carried out the self assembled monolayer on dielectric layer |
| CN103969907A (en) * | 2013-02-05 | 2014-08-06 | 辉达公司 | Display panel and tablet electronic equipment with same |
| CN109073952A (en) * | 2016-05-23 | 2018-12-21 | 清墨显示股份有限责任公司 | Mixed reflection-transmitting image display |
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Open date: 20100915 |