LIQUID CRYSTAL DISPLAY

Abstract

A liquid crystal display (LCD) includes an insulating substrate, a gate line formed over the insulating substrate, an active layer formed on the gate line, a source line formed over the insulating substrate and extending substantially perpendicular to the gate line, and a drain line coupled to a pixel electrode, extending across the overlapping region of the active layer and the gate line. The gate line comprises first and second width portions, and the first width portion is narrower than the second width portion and overlaps the drain line.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 1 is a plan view of a conventional thin-film transistor-LCD (TFT-LCD);

FIG. 2 shows an equivalent circuit of a pixel unit in a TFT-LCD to illustrate the effect of C_GD on LCD illumination;

FIG. 3 is a plan view of an LCD in accordance with an embodiment of the invention; and

FIG. 4 is a plan view of an LCD in accordance with another embodiment of the invention.

Claims

1. A liquid crystal display (LCD) comprising: an insulating substrate;a gate line formed over the insulating substrate;an active layer formed on the gate linea source line formed over the insulating substrate, extending substantially perpendicular to the gate line;a pixel electrode; anda drain line coupled to a pixel electrode, extending across the overlapping region of the active layer and the gate line,wherein the gate line comprises a first width portion and a second width portion, and the first width portion is narrower than the second width portion and overlaps the drain line.

2. The LCD of claim 1, wherein the drain line has at least one extension region formed on the boundary of the overlapped region of the active layer and the gate line, respectively.

3. The LCD of claim 1, wherein the source line extending across the gate line has an extension region formed on the boundary of the overlapping region of the active layer and the gate line.

4. The LCD of claim 3, wherein the drain line has at least one extension region formed on one side of the extension region of the source line and located on the boundary of the overlapping region of the active layer and the gate line.

5. The LCD of claim 4, wherein the drain line has two extension regions respectively formed on one side of the extension region of the source line and located on the boundary of the overlapping region of the active layer and the gate line.

6. The LCD of claim 1, wherein the gate line comprises a gate electrode formed on the first width portion and part of the second width portion.

7. The LCD of claim 3, wherein the extension region of the source line acts as a source electrode.

8. The LCD of claim 1, wherein the region of the drain line overlapping the first width portion of the gate line acts as a drain electrode.

9. The LCD of claim 1, wherein the drain line extends beyond the boundary of the overlapping region of the active layer and the first width portion.