Transflective display device

• US 7,495,726 B2
• Filed: 12/05/2005
• Issued: 02/24/2009
• Est. Priority Date: 12/10/2004
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Ga-Lane
• Primary Examiner(s): KIANNI, KAVEH C
• Application Number:
  US11/164,776
• Publication Number:
  US 20060197893A1
• Time in Patent Office: 1,177 Days
• Field of Search: 349/114, 349/113
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A transflective FPD device is provided. The transflective FPD device includes a liquid crystal layer and a transflective layer. The transflective layer includes a matrix made of a transparent material and a plurality of reflective nano-particles. The reflective nano-particles are configured for reflecting ambient light and are dispersed uniformly and randomly in the entire matrix. The transflective layer is adapted for reflecting ambient lights, and as well as for allowing backlight to pass therethrough.

Claims

1. A transflective LCD device comprising:

a liquid crystal layer; and

a transflective layer comprising;

a matrix made of a transparent material; and

a plurality of reflective nano-particles configured for reflecting ambient light, the reflective nano-particles having grain sizes in the approximate range from 2 nm to 20 nm, said reflective nano-particles being dispersed uniformly and randomly in the entire matrix.

2. The transflective LCD device as described in claim 1, wherein the sizes of said reflective nano-particles are discretely distributed.

3. The transflective LCD device as described in claim 2, wherein the discrete distribution of said nano-particles has three peaks respectively corresponding to a first range, a second range, and a third range, wherein said reflective nano-particles with sizes in the first range are adapted for reflecting light of a red light band, said reflective nano-particle with sizes in the second range are adapted for reflecting light of a green light band, and said reflective nano-particles with sizes in the third range are adapted for reflecting lights of a blue light band.

4. The transflective LCD device as described in claim 1, wherein said reflective nano-particles are at least one of doped and implanted into said matrix.

5. The transflective LCD device as described in claim 1, wherein said reflective nano-particles are randomly dispersed and are adapted for diffusely reflecting incident lights from all directions.

6. The transflective LCD device as described in claim 1, further comprising a color filter disposed under the liquid crystal layer.

7. The transflective LCD device as described in claim 1, wherein the reflective particles are comprised of a reflective material selected from the group consisting of Ag, Al, Ti, Cr, and Al—

Ag alloy.

8. The transflective LCD device as described in claim 1, further comprising an upper polarizer disposed on the liquid crystal layer and a lower polarizer disposed under the transflective layer.

9. The transflective LCD device as described in claim 8, further comprising an anti-glare layer coated on the upper polarizer.

10. The transflective LCD device as described in claim 9, further comprising an anti-reflection layer coated on the anti-glare layer.