PIXEL UNIT AND DISPLAY DEVICE UTILIZING THE SAME

Abstract

A pixel unit comprising a first metal layer and a second metal layer. The first metal layer comprises a gate electrode and a first electrode. The second metal layer comprises a drain electrode, a source electrode, and a second electrode. The drain electrode overlaps the gate electrode in a first overlapping region. The source electrode overlaps the gate electrode in a second overlapping region. The second electrode overlaps the first electrode in a third overlapping region. The size of the first electrode approximates that of the second electrode. The first electrode and the second electrode are staggered.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:

FIG. 1 a is a schematic diagram of a conventional pixel unit;

FIG. 1 b is an equivalent circuit for the conventional pixel unit shown in FIG. 1a;

FIG. 1 c is a timing diagram for the conventional pixel unit shown in FIG. 1a;

FIG. 2 a is a schematic diagram of an embodiment of pixel unit; and

FIGS. 2 b-5b are schematic diagrams of another embodiment of pixel unit.

Claims

1. A pixel unit, comprising: a first metal layer comprising a gate electrode and a first electrode; anda second metal layer comprising a drain electrode overlapping the gate electrode in a first overlapping region, a source electrode overlapping the gate electrode in a second overlapping region, and a second electrode overlapping the first electrode in a third overlapping region, wherein the size of the first electrode approximates that of the second electrode and wherein the first electrode and the second electrode are staggered.

2. The pixel unit of claim 1, wherein the variable quantity of the area of the first overlapping region and that of the area of the third overlapping region have a direct ratio correlation.

3. The pixel unit of claim 1, wherein the area of the third overlapping region is changed according to the area of the first overlapping region when the shapes of the first and the second electrode are changed.

4. The pixel unit of claim 3, wherein the shapes of the first and the second electrode are fish-bone-shaped or railing-shaped.

5. The pixel unit of claim 1, further comprising a connection electrode coupled between the second electrode and the drain electrode, wherein the connection electrode does not overlap the gate electrode or the first electrode when the area of first overlapping region is changed.

6. The pixel unit of claim 5, wherein the second metal layer comprises the connection electrode.

7. The pixel unit of claim 1, wherein the areas of the first, the second, and the third overlapping regions are changed when the second metal layer is horizontally or vertically moved.

8. The pixel unit of claim 1, further comprising a semiconductor layer disposed between the first and the second metal layers, wherein the semiconductor layer overlaps the gate electrode in a fourth overlapping region and wherein the semiconductor layer overlaps the first electrode in a fifth overlapping region.

9. The pixel unit of claim 8, wherein the areas of the fourth and fifth overlapping regions are changed when the semiconductor layer is horizontally or vertically moved.

10. The pixel unit of claim 8, wherein the fourth overlapping region overlaps a portion of the first overlapping region and a portion of the second overlapping region and wherein the fifth overlapping region overlaps a portion of the third overlapping region.

11. The pixel unit of claim 1, further comprising a gate line, the gate electrode being coupled to the gate line, wherein the first electrode comprises a first hole, and the second electrode comprises a second hole, and wherein the first hole and the gate line are vertical and the second hole and the gate line are vertical when the drain electrode and the gate line are vertical.

12. The pixel unit of claim 1, further comprising a gate line, the gate electrode being coupled to the gate line, wherein the first electrode comprises a first hole, and the second electrode comprises a second hole, and wherein the first hole and the gate line are horizontal and the second hole and the gate line are horizontal when the drain electrode and the gate line are horizontal.

13. The pixel unit of claim 1, wherein the shapes of the first and the second electrodes are substantially the same.

14. A display device, comprising: a scan driver for providing at least one scan signal;a data driver for providing at least one data signal; anda plurality of pixel units for receiving the scan and data signals, each pixel unit comprising a first metal layer comprising a gate electrode and a first electrode, anda second metal layer comprising a drain electrode overlapping the gate electrode in a first overlapping region, a source electrode overlapping the gate electrode in a second overlapping region, and a second electrode overlapping the first electrode in a third overlapping region, wherein the size of the first electrode approximates that of the second electrode and wherein the first electrode and the second electrode are staggered.

15. The display device of claim 14, wherein the variable quantity of the area of the first overlapping region and that of the area of the third overlapping region have a direct ratio correlation.

16. The display device of claim 14, wherein the area of the third overlapping region is changed according to the area of the first overlapping region when the shapes of the first and the second electrode are changed.

17. The display device of claim 16, wherein the shapes of the first and the second electrode are fish-bone-shaped or railing-shaped.

18. The display device of claim 14, further comprising a connection electrode coupled between the second electrode and the drain electrode, wherein the connection electrode does not overlap the gate electrode or the first electrode when the area of first overlapping region is changed.

19. The display device of claim 18, wherein the second metal layer comprises the connection electrode.

20. The display device of claim 14, wherein the areas of the first, the second, and the third overlapping regions are changed when the second metal layer is horizontally or vertically moved.

21. The display device of claim 14, further comprising a semiconductor layer disposed between the first and the second metal layers, wherein the semiconductor layer overlaps the gate electrode in a fourth overlapping region and wherein the semiconductor layer overlaps the first electrode in a fifth overlapping region.

22. The display device of claim 21, wherein the areas of the fourth and fifth overlapping regions are changed when the semiconductor layer is horizontally or vertically moved.

23. The display device of claim 22, wherein the fourth overlapping region overlaps part of the first overlapping region and part of the second overlapping region, and wherein the fifth overlapping region overlaps part of the third overlapping region.

24. The display device of claim 14, wherein each pixel unit further comprises a gate line, the gate electrode being coupled to the gate line, wherein the first electrode comprises a first hole, and the second electrode comprises a second hole, and wherein the first hole and the gate line are vertical and the second hole and the gate line are vertical when the drain electrode and the gate line are vertical.

25. The display device of claim 14, wherein each pixel unit further comprises a gate line, the gate electrode being coupled to the gate line, wherein the first electrode comprises a first hole, and the second electrode comprises a second hole, and wherein the first hole and the gate line are horizontal and the second hole and the gate line are horizontal when the drain electrode and the gate line are horizontal.

26. The display device of claim 14, wherein the shapes of the first and the second electrodes are substantially the same.