Reflection type liquid crystal display device having a high aperture ratio

• US 6,781,658 B1
• Filed: 11/24/1999
• Issued: 08/24/2004
• Est. Priority Date: 11/27/1998
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Choi, Woong Sik
• Primary Examiner(s): Parker, Kenneth
• Assistant Examiner(s): QI, ZHI QIANG
• Application Number:
  US09/448,277
• Time in Patent Office: 1,735 Days
• Field of Search: 349/139, 349/143, 349/42, 349/43, 349/38, 438/30
• US Class Current: 349/139
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/134336 Matrix

Abstract

A reflection type liquid crystal display device includes first and second gate lines, first and second data lines intersecting said first and second gate lines, an insulating layer covering said data lines, and a pixel electrode overlapping the first and second data lines in order to increase the aperture ratio. The overlapped area between the pixel electrode and the first data line and the areas between the pixel electrode and the second data line are substantially the same with each other. Each overlapped area covers substantially half of the length of the data line. Consequently, the reflective pixel electrodes cover the data lines substantially on the whole.

Claims

1. A liquid crystal display device comprising:

a substrate;

first and second gate lines formed on the substrate;

first and second data lines intersecting the first and second gate lines so as to define a first pixel region, wherein each one of the first and second data lines has longitudinally arranged first and second regions;

a second pixel region adjacent to the first pixel region and adjacent to the second data line;

an insulating film covering first and second gate lines and the first and the second data lines;

a first pixel electrode disposed in the first pixel region, the first pixel electrode overlapping one of the first and the second regions of the first data line, and the first pixel electrode overlapping one of the first and second regions of the second data line;

a second pixel electrode disposed in second pixel region, the second pixel electrode overlapping one of the first and second regions of the second data line that is not overlapped by the first pixel electrode; and

a switching element disposed in the pixel region and connected between the second gate line and the pixel electrode.

2. The liquid crystal display device of claim 1, wherein the pixel electrode overlaps the first and the second data lines by whole width of the data lines and by a substantially one-half length of each one of the first and the second data lines.

3. The liquid crystal display device of claim 2, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.

4. The liquid crystal display device of claim 1, wherein the pixel electrode is a reflective pixel electrode.

5. The liquid crystal display device of claim 1, wherein the first and the second regions are approximately the same.

6. The liquid crystal display device of claim 1, wherein the liquid crystal display device is driven by an alternating current driving method.

7. The liquid crystal display device of claim 6, wherein the pixel electrode overlaps the first and the second data lines by whole width of the data lines and by a substantially one-half length of each one of the first and the second data lines.

8. The liquid crystal display device of claim 6, wherein the pixel electrode is a reflective pixel electrode.

9. The liquid crystal display device of claim 6, wherein the first and the second regions are approximately the same.

10. The liquid crystal display device of claim 6, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.

11. The liquid crystal display device of claim 1, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.

12. A method of manufacturing a liquid crystal display device, comprising the steps of:

providing a substrate;

forming first and second gate lines on the substrate;

forming first and second data lines intersecting the first and second gate lines so as to define a first pixel region, wherein each one of the first and second data lines has longitudinally arranged first and second regions;

forming a second pixel region adjacent to the first pixel region and adjacent to the second data line;

forming an insulating film covering the first and second gate lines and the first and the second data lines;

forming a switching element disposed in the pixel region and connected between the second gate line and the pixel electrode;

forming a first pixel electrode in the first pixel region to overlap one of the first and the second regions of the first data line and to overlap one of the first and second regions of the second data line; and

forming a second pixel electrode in the second pixel region to overlap one of the first and the second regions of the second data line that is not overlapped by the first pixel electrode.

13. The method of claim 12, wherein the pixel electrode overlaps the first and the second data lines by whole width of the data lines and by a substantially one-half length of each one of the first and the second data lines.

14. The method of claim 13, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.

15. The method of claim 12, wherein the pixel electrode is a reflective pixel electrode.

16. The method of claim 12, wherein the first and the second regions are approximately the same.

17. The method of claim 12, wherein the liquid crystal display device is driven by an alternating current driving method.

18. The method of claim 17, wherein the pixel electrode overlaps the first and the second data lines by whole width of the data lines and by a substantially one-half length of each one of the first and the second data lines.

19. The method of claim 17, wherein the pixel electrode is a reflective pixel electrode.

20. The liquid crystal display device of claim 17, wherein the first and the second regions are approximately the same.

21. The liquid crystal display device of claim 17, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.

22. The method of claim 12, wherein the pixel electrode extends over the first region of the first date line and extends over the second region of the second data line.