Display device

• US 8,139,185 B2
• Filed: 02/21/2007
• Issued: 03/20/2012
• Est. Priority Date: 07/07/2006
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nishida, Kenji
• Primary Examiner(s): Cushwa, Michelle R Connelly
• Application Number:
  US12/307,639
• Publication Number:
  US 20090279027A1
• Time in Patent Office: 1,854 Days
• Field of Search: None
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

The present invention provides a display device which can provide bright display by both of reflective display and transmissive display without having a multi-gap structure and which can reduce a difference in response time between the reflective region and the transmissive region. The display device of the present invention is a display device including: a pair of substrates; a display medium interposed between the pair of substrates; and a pixel having a reflective region for performing reflective display and a transmissive region for performing transmissive display, wherein the display device includes a pixel electrode and a common electrode on one of the pair of substrates, a voltage is applied to the display medium through the pixel electrode and the common electrode, the pixel electrode is provided with a slit, and a shield electrode is arranged between the pixel electrode and the common electrode in the reflective region.

Claims

1. A display device comprising:

a pair of substrates;

a display medium interposed between the pair of substrates; and

a pixel having a reflective region for performing reflective display and a transmissive region for performing transmissive display,

wherein the display device includes a pixel electrode and a common electrode on one of the pair of substrates,

a voltage is applied to the display medium through the pixel electrode and the common electrode,

the pixel electrode is provided with a slit, and

shield electrodes are arranged between the pixel electrode and the common electrode in the reflective region so that shield electrodes are present in the reflective region but not in the transmissive region of a given pixel.

2. The display device according to claim 1, wherein the shield electrode is connected to ground.

3. The display device according to claim 1, wherein the pixel electrode has a comb-tooth shape.

4. The display device according to claim 1, wherein the slit of the pixel electrode is entirely surrounded by the pixel electrode.

5. The display device according to claim 1, wherein the slit of the pixel electrode has a rectangular shape.

6. The display device according to claim 1, wherein the slit of the pixel electrode has a rectangular shape having at least one bent part.

7. The display device according to claim 1, wherein the slit of the pixel electrode has a zig-zag shape.

8. The display device according to claim 1, wherein the slit of the pixel electrode has a circular arc shape.

9. The display device according to claim 1, wherein the slit of the pixel electrode has a meandering shape.

10. The display device according to claim 1, wherein the common electrode is formed in a layer different from the pixel electrode, and the shield electrode and an insulating film are between the pixel electrode and the common electrode.

11. The display device according to claim 1, wherein the common electrode is provided with a slit.

12. The display device according to claim 11, wherein the pixel electrode and the common electrode are arranged in a layer where the shield electrode is formed.

13. The display device according to claim 11, wherein the slit of the common electrode has substantially the same shape as a shape of the slit of the pixel electrode.

14. The display device according to claim 1, wherein a width of the slit of the pixel electrode in the reflective region is larger than a width of the slit of the pixel electrode in the transmissive region.

15. A display device comprising:

a pair of substrates;

a display medium interposed between the pair of substrates; and

a pixel having a reflective region for performing reflective display and a transmissive region for performing transmissive display,

wherein the display device includes a pixel electrode and a common electrode on one of the pair of substrates,

a voltage is applied to the display medium through the pixel electrode and the common electrode,

the common electrode is provided with a slit, and

shield electrodes are arranged between the pixel electrode and the common electrode in the reflective region so that shield electrodes are present in the reflective region but not in the transmissive region of the pixel.

16. The display device according to claim 15, wherein the shield electrode is connected to ground.

17. The display device according to claim 15, wherein the common electrode has a comb-tooth shape.

18. The display device according to claim 15, wherein the slit of the common electrode is entirely surrounded by the common electrode.

19. The display device according to claim 15, wherein the slit of the common electrode has a rectangular shape.

20. The display device according to claim 15, wherein the slit of the common electrode has a rectangular shape having at least one bent part.

21. The display device according to claim 15, wherein the slit of the common electrode has a zig-zag shape.

22. The display device according to claim 15, wherein the slit of the common electrode has a circular arc shape.

23. The display device according to claim 15, wherein the slit of the common electrode has a meandering shape.

24. The display device according to claim 15, wherein the common electrode is formed in a layer different from the pixel electrode, and the shield electrode and an insulating film are between the pixel electrode and the common electrode.

25. The display device according to claim 15, wherein a width of the slit of the common electrode in the reflective region is larger than a width of the slit of the common electrode in the transmissive region.