DISPLAY DEVICE

• US 20110261301A1
• Filed: 01/20/2011
• Published: 10/27/2011
• Est. Priority Date: 04/27/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: NOH, Chang-ho, JEON, Seog-jin, DAS, Rupasree Ragini
• Granted Patent: US 8,953,119 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/1334 based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence

Abstract

A display device includes a first electrode layer, a color switching layer which is disposed on the first electrode layer, a second electrode layer which is disposed on the color switching layer and a color filter layer which is disposed on the second electrode layer. The color switching layer includes a first color cell, which transmits incident light or changes incident light to a first color light, a second color cell, which transmits incident light or changes incident light to a second color light and a third color cell, which transmits incident light or changes incident light to a third color light. The color filter layer includes a first filter which transmits a cyan light, a second filter which transmits a magenta light and a third filter which transmits a yellow light.

Claims

1. A display device comprising:

a first electrode layer;

a reflective layer, which is disposed on the first electrode layer;

a color switching layer, which is disposed on the reflective layer and comprises;

a first color cell, which transmits incident light or changes the incident light to a first color light;

a second color cell, which transmits the incident light or changes the incident light to a second color light; and

a third color cell, which transmits the incident light or changes the incident light to a third color light;

a second electrode layer, which is disposed on the color switching layer, the color switching layer between the first and second electrode layers; and

a color filter layer, which is disposed on the second electrode layer and comprises;

a first filter, which transmits a cyan light;

a second filter, which transmits a magenta light; and

a third filter, which transmits a yellow light.

2. The display device of claim 1, wherein

the first color light has a color complementary with respect to the cyan light,

the second color light has a color complementary with respect to the magenta light, and

the third color light has a color complementary with respect to the yellow light.

3. The display device of claim 1, wherein

the first color light comprises a red light,

the second color light comprises a green light, and

the third color light comprises a blue light.

4. The display device of claim 1, wherein at least one of the first electrode layer and the second electrode layer includes a transparent conductive material.

5. The display device of claim 1, wherein the color switching layer comprises an electrochromic layer.

6. The display device of claim 1, wherein the color switching layer comprises a polymer dispersed liquid crystal layer mixed with a dichroic dye.

7. The display device of claim 1, wherein the color switching layer comprises red, green, and blue cholesteric liquid crystal layers.

8. The display device of claim 1, wherein the color switching layer comprises an electronic-ink layer having red, green, blue, and white color balls.

9. The display device of claim 1, wherein

the first color cell and the first filter are arranged to face each other,

the second color cell and the second filter are arranged to face each other, and

the third color cell and the third filter are arranged to face each other.

10. The display device of claim 1, wherein the color filter layer further comprises a fourth filter, which transmits the incident light.

11. The display device of claim 10, wherein the color switching layer further comprises a fourth color cell, which is arranged to face the fourth filter.

12. The display device of claim 11, wherein the fourth color cell transmits the incident light or changes the incident light to a black light.

13. The display device of claim 1, wherein the color switching layer transmits the incident light or changes colors of the incident light at each of the color cells according to a voltage applied to the color cells.

14. A display device comprising:

a first electrode layer;

a color switching layer, which is disposed on the first electrode layer and comprises;

a first color cell, which transmits incident light or changes the incident light to a first color light;

a second color cell, which transmits the incident light or changes the incident light to a second color light; and

a third color cell, which transmits the incident light or changes the incident light to a third color light;

a second electrode layer, which is disposed on the color switching layer, the color switching layer between the first and second electrode layers; and

a color filter layer, which is disposed on the second electrode layer and comprises;

a first filter, which transmits a cyan light;

a second filter, which transmits a magenta light; and

a third filter, which transmits a yellow light.

15. The display device of claim 14, wherein the color switching layer transmits the incident light or changes colors of the incident light at each of the color cells according to a voltage applied to the color cells.

16. The display device of claim 14, wherein

the first color light comprises a red light,

the second color light comprises a green light, and

the third color light comprises a blue light.

17. The display device of claim 15, wherein the first electrode layer and the second electrode layer include a transparent conductive material.

18. The display device of claim 14, the color switching layer comprises an electrochromic layer.

19. The display device of claim 14, wherein the color switching layer comprises a polymer dispersed liquid crystal layer mixed with a dichroic dye.

20. The display device of claim 14, wherein the color switching layer comprises red, green, and blue cholesteric liquid crystal layers.

21. The display device of claim 14, wherein the color switching layer comprises an electronic ink having red, green, blue, and white color balls.

22. The display device of claim 14, wherein

the first color cell and the first filter are arranged to face each other,

the second color cell and the second filter are arranged to face each other, and

the third color cell and the third filter are arranged to face each other.