Color pixel structure of an electrochromic display

• US 7,777,934 B2
• Filed: 06/11/2008
• Issued: 08/17/2010
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cha, Seung Nam, Jung, Jae Eun, Noh, Chang Ho, Jang, Jae Eun
• Primary Examiner(s): Thompson; Timothy J
• Application Number:
  US12/157,343
• Publication Number:
  US 20090161195A1
• Time in Patent Office: 797 Days
• Field of Search: 359/265, 359/263, 359/267, 359/272, 359/273, 359/275, 359/238
• US Class Current: 359/265
• CPC Class Codes: G02F 1/13473 for wavelength filtering or for colour display without the use of colour mosaic filters
• CPC Class Codes: G02F 1/153 Constructional details
• CPC Class Codes: G02F 2203/34 Colour display without the use of colour mosaic filters

Abstract

A color pixel structure of a color display system based on electrochromism. The color pixel structure includes two one-cell two-color type unit cells laminated. Each of the unit cells includes an upper panel, a lower panel and electrochromic materials of different colors applied to both the upper and lower panels. The color pixel structure exhibits improved color characteristics and have a simple structure. The color pixel structure can be applied to a variety of electrochromic displays due to their excellent visibility and simple structure.

Claims

1. A color pixel structure of an electrochromic display, the color pixel structure comprising:

two one-cell two-color type unit cells, each comprising;

an upper panel;

a lower panel; and

electrochromic materials of different colors disposed below the upper panel and above the lower panel; and

a reflective panel,

wherein the two one-cell two-color type unit cells are vertically laminated with one another,

four colors of the two one-cell two-color type unit cells are different from one another, and

the reflective panel receives light passing through the two one-cell two-color type unit cells and reflects the light.

3. The color pixel structure of claim 1, wherein the electrochromic materials have a same electrochemical properties, including discoloration upon oxidation or reduction.

5. The color pixel structure of claim 1, wherein one of the four colors of the two one-cell two-color type unit cells is black.

9. The color pixel structure of claim 1, wherein the structure is transmissive.

2. A color pixel structure of an electrochromic display, the color pixel structure comprising:

two one-cell two-color type unit cells, each comprising;

n upper panel;

lower panel; and

electrochromic materials of different colors disposed below the upper panel and above the lower panel;

a pair of partition walls disposed vertically between the upper panel and the lower panel on opposite ends of the upper panel and the lower panel; and

a reflective panel,

wherein the two one-cell two-color type unit cells are arranged parallel to each other,

the electrochromic materials are disposed in a space defined by the upper panel, the lower panel, and the pair of partition walls,

four colors of the two one-cell two-color type unit cells are different from one another, and

the reflective panel receives light passing through the two one-cell two-color type unit cells and reflects the light.

4. The color pixel structure of claim 2, wherein the electrochromic materials have a same electrochemical properties, including discoloration upon oxidation or reduction.

6. The color pixel structure of claim 2, wherein one of the four colors of the two one-cell two-color type unit cells is black.

8. The color pixel structure of claim 2, further comprising a detachable reflective panel under the second lower panel.

10. The color pixel structure of claim 2, wherein the structure is transmissive.

7. A color pixel structure of an electrochromic display, the color pixel structure comprising:

one one-cell two-color type unit cell having a first upper panel, a first lower panel, and electrochromic materials of different colors disposed below the first upper panel and above the first lower panel, and

one one-cell one-color type unit cell having a second upper panel, a second lower panel, and an electrochromic material having a first color disposed at least one of below the second upper panel and above the second lower panel;

wherein the one one-cell two-color type unit cell is vertically laminated with the one one-cell one-color type unit cell.

11. A color pixel structure of an electrochromic display, the color pixel structure comprising:

two one-cell one-color type unit cells, each comprising;

an upper panel;

a lower panel; and

an electrochromic material disposed at least one of below the upper panel and above the lower panel; and

a common unit cell comprising;

a common upper panel;

a common lower panel;

a common electrochromic material disposed at least one of below the common upper panel and above the common lower panel,

wherein the two one-cell one-color unit cells are arranged parallel to each other,

the common unit cell is vertically laminated with the two one-cell one-color type unit cells, and

external light passes through the common unit cell before being incident on the two one-cell one-color type unit cells.

12. The color pixel structure of claim 11, further comprising one-cell one-color type unit cells laminated on the respective unit cells arranged in parallel.

13. The color pixel structure of claim 12, wherein a color of one of the four unit cells is black.

14. The color pixel structure of claim 11, further comprising a detachable reflective panel disposed below the lower panel.

15. The color pixel structure of claim 12, further comprising a detachable reflective panel disposed below the lower panel.

16. The color pixel structure of claim 11, wherein the structure is transmissive.

17. The color pixel structure of claim 12, wherein the structure is transmissive.