Liquid crystal display panel

• US 20020054264A1
• Filed: 09/19/2001
• Published: 05/09/2002
• Est. Priority Date: 09/19/2000
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong-Gyu, Kim, Jang-Soo, Kwag, Jin-Oh, Lee, Kyung-Eun
• Granted Patent: US 6,700,635 B2
• Time in Patent Office: Days
• US Class Current: 349/143
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/134336 Matrix

Abstract

A pixel electrode is located in a pixel area defined by the intersections of the two adjacent gate lines and the two adjacent data lines, and has two linear openings extending in the transverse direction, which divide the pixel electrodes into three rectangular portions arranged in the longitudinal direction. The portions are connected in turn, and each portion of the pixel electrode has an X-shaped projection formed by the X-shaped member thereunder, and portions of the gate insulating film and the passivation film on the member. Since the gate insulating film and the passivation film are also located on the gate lines and the data lines, and the layered structure on the wires acts as peripheral projections of the pixel electrode. Each area enclosed by the projections, the openings and the peripheral projections is in a shape of equilateral trapezoid. The areas may be defined as the areas where the pixel electrode is in direct contact with the substrate. That is, each area has a planar shape of triangle, of which corner at the center of X-shape is chamfered. This structure causes a splay arrangement or a bend arrangement of the liquid crystal molecules in each domain, which is defined as a portion of the liquid crystal layer over each divided area, to be reinforced to improve the response time.

Claims

1. A liquid crystal display panel comprising:

an insulating substrate; and

a pixel electrode formed on the substrate, the pixel electrode having pluralities of openings and X-shaped projections protruding from surface of the pixel electrode, wherein the openings are disposed between the projections and an area enclosed by the X-shaped projections, the openings, and boundary of the pixel electrode has a planar shape of equilateral trapezoid or acute angle.

2. The liquid crystal display panel of claim 1, wherein a long side of the equilateral trapezoid is convex.

3. The liquid crystal display panel of claim 1, wherein a long side of the equilateral trapezoid is curved.

4. The liquid crystal display panel of claim 1, further comprising a plurality of X-shaped members located under the respective projections, and an insulating layer between the projections and the X-shaped members, thereby causing the projections to protrude.

5. The liquid crystal display panel of claim 4, wherein the insulating layer has a double-layered structure.

6. The liquid crystal display panel of claim 5, wherein the pixel electrode except for the projections is in direct contact with the substrate.

7. The liquid crystal display panel of claim 4, wherein the X-shaped members are made of metal.

8. The liquid crystal display panel of claim 7, wherein at least two of the X-shaped members are connected to each other.

9. The liquid crystal display panel of claim 1, further comprising an image signal line transmitting image signals to the pixel electrode.

10. The liquid crystal display panel of claim 9, further comprising:

a scanning signal line transmitting scanning signals; and

a transistor connected to the scanning signal line, the image signal line and the pixel electrode to transmit the image signals from the image signal line to the pixel electrode responsive to the scanning signals from the scanning signal line.