ELECTROPHORETIC DISPLAY AND THE MANUFACTURING METHOD THEREOF

• US 20080100565A1
• Filed: 10/24/2007
• Published: 05/01/2008
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Hydis Technology Company Limited (E Ink Holdings Incorporated)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Song, Keun-Kyu, Kim, Bo-Sung, Shin, Jung-Han
• Granted Patent: US 8,049,952 B2
• Time in Patent Office: Days
• US Class Current: 345/107
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 3/3433 using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38
• CPC Class Codes: G09G 3/3446 with more than two electrodes controlling the modulating element

Abstract

An elecotrophoretic display device includes a first substrate, a gate line formed on the first substrate, a data line crossing the gate line to form a defined area, a source electrode connected to the data line, a drain electrode facing the source electrode to define a channel area, a color filter formed on the first substrate, a first electrode formed on the color filter, the first electrode electrically connected to the drain electrode, a second substrate facing the first substrate, a second electrode formed on the second substrate and a fluid and a plurality of charged particles interposed between the first electrode and the second electrode.

Claims

1. An elecotrophoretic display device comprising:

a first substrate;

a gate line formed on the first substrate;

a data line crossing the gate line to form a defined area;

a source electrode connected to the data line;

a drain electrode facing the source electrode to define a channel area;

a color filter formed on the first substrate;

a first electrode formed on the color filter, the first electrode electrically connected to the drain electrode;

a second substrate facing the first substrate;

a second electrode formed on the second substrate; and

a fluid and a plurality of charged particles interposed between the first electrode and the second electrode.

2. The elecotrophoretic display device of claim 1, wherein the first electrode is formed directly-on the color filter.

3. The elecotrophoretic display device of claim 1, further comprising an adhesion layer formed on the first electrode, wherein the fluid and the charged particles are formed on the adhesion layer.

4. The elecotrophoretic display device of claim 1, further comprising a gate insulation layer formed on the gate line, wherein the gate insulation layer includes an opening portion overlapping the defined area.

5. The elecotrophoretic display device of claim 1 further comprising a passivation layer to cover the channel area, wherein the passivation layer includes an opening portion overlapping the defined area.

6. The elecotrophoretic display device of claim 1, wherein the charged particles comprise white charged particles.

7. The elecotrophoretic display device of claim 6, wherein the charged particles comprise black charged particles having a polarity opposite to the white charged particle.

8. The elecotrophoretic display device of claim 1, wherein the second substrate is flexible.

9. The elecotrophoretic display device of claim 1, wherein the gate line includes a metal which is non-reflective.

10. The elecotrophoretic display device of claim 9, wherein the gate line comprises at least one of chromium, chromium oxide, molybdenum or molybdenum oxide.

11. The elecotrophoretic display device of claim 1, wherein the data line includes a metal which is non-reflective.

12. The elecotrophoretic display device of claim 11, wherein the data line comprises at least one of chromium, chromium oxide, molybdenum, or molybdenum oxide.

13. The elecotrophoretic display device of claim 1, wherein the color filter comprises at least one of a red color filter, a green color filter, a blue color filter or a white color filter.

14. The elecotrophoretic display device of claim 13, wherein the color filters having different colors overlaps on the data line.

15. The elecotrophoretic display device of claim 1, wherein an external light passing through the first substrate and the color filter is reflected by the charged particles, and then perceived by an observer.

16. A method of manufacturing an elecotrophoretic display device, the method comprising:

forming a gate line on a first substrate;

forming a gate insulation layer on the gate line;

forming a semiconductor layer on the gate insulation layer;

forming a data line crossing the gate line to form a defined area;

forming a passivation layer on a first substrate;

forming a color filter on the first substrate having the data line formed thereon;

forming a first electrode on the color filter;

forming a second electrode on a second substrate;

forming a receiving member including fluid and a plurality of charged particles on the second electrode; and

coupling the second substrate with the first substrate.

17. The method of claim 16, wherein the second substrate is coupled with the first substrate through a lamination process.

18. The method of claim 16, further comprising;

forming an opening portion through the passivation layer and an opening portion through the gate insulation layer, the openings overlapping the defined area.