Liquid crystal display panel

Abstract

Liquid crystal display panel 10 is provided with TFT and pixel electrode 19, between which interlayer insulator 17 is interposed, and with reflective section 15, in each of a matrix of pixels; having first substrate whereon the pixel electrode 19 and the TFT's electrode D electrically connect via contact hole 20 formed in the reflective section 15; second substrate whereon at least one protrusions 311 to 313 are formed on common electrode in positions corresponding to the each pixel; perpendicular alignment layers deposited on each substrate; and liquid crystal 29 with negative dielectric anisotropy disposed between substrates. In position corresponding to base of protrusion 313 provided opposite the second substrate's contact hole 20, light-blocking film 363 is formed so as to cover the base viewed from above. Thus, liquid crystal display panel is provided wherein light leakage from reflective section's contact hole and from protrusions is curbed, with high contrast and display quality.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view of one pixel portion of the semitransmissive liquid crystal display panel according to the embodiment, seen through the color filter.

FIG. 2 is a cross-sectional view along line II-II in FIG. 1.

FIG. 3 is a schematic plan view, corresponding to FIG. 1, of a variant of the embodiment.

FIG. 4A is a perspective view illustrating in outline the structure of an MVA semitransmissive liquid crystal display panel.

FIG. 4B is a schematic view illustrating the inclined state of the liquid crystals when an electrical field is applied to the liquid crystal of the liquid crystal layer.

FIG. 5 is a cross-sectional view along line V-V in FIG. 4A.

FIG. 6 is a plan view of a single pixel of another related art MVA semitransmissive liquid crystal display panel.

FIG. 7 is a cross-sectional view along line VII-VII in FIG. 6.

FIG. 8 is an enlarged view illustrating conceptually the liquid crystal molecules in an inclining state at the contact hole portion of FIG. 7.

Claims

1. A liquid crystal display panel comprising: a first substrate;a second substrate deployed facing said first substrate;a liquid crystal layer with negative dielectric anisotropy disposed between said first substrate and second substrate;pixels that are disposed on said first substrate in a matrix and that each have at least a reflective section;switching elements that are disposed on said first substrate so as to correspond to each pixel;an interlayer insulator that covers said switching elements;a contact hole that is formed in said interlayer insulator;a pixel electrode that is formed over said interlayer insulator and that is electrically connected to said switching elements via said contact hole;a common electrode that is provided on said second substrate;protrusions that are formed on said common electrode in positions corresponding to each pixel and that control the inclination of the liquid crystal molecules; andperpendicular alignment layers that are deposited over the first and second substrates respectively;said protrusions being disposed at least in a position facing said contact hole, and light-blocking films that cover the bases of said protrusions as viewed from above being formed on said second substrate.

2. The liquid crystal display panel according to claim 1, wherein said contact hole is formed in said reflective section.

3. The liquid crystal display panel according to claim 1, wherein the shape of the bases of said protrusions and the shape of said light-blocking films are circular, oval, bar-shape, Y-shape, or a shape combining superposed Y-shape and inverted Y-shape.

4. The liquid crystal display panel according to claim 1, wherein said pixel electrode has a transmissive section, and on the second substrate at least one of the protrusions is formed in a position corresponding to said transmissive section, and moreover light-blocking films are formed that cover the bases of said protrusions as viewed from above.

5. The liquid crystal display panel according to claim 4, wherein the shape of the bases of the protrusions in said transmissive section and the shape of said light-blocking films are circular, oval, bar-shape, Y-shape, or a shape combining superposed Y-shape and inverted Y-shape.

6. The liquid crystal display panel according to claim 1, wherein said light-blocking films have a shape that is identical to that of the bases of said protrusions or that is larger than the bases of said protrusions as viewed from above.

7. The liquid crystal display panel according to claim 1, wherein said light-blocking films are made of the same material as a black matrix that partitions the pixels on said second substrate and are formed simultaneously with the formation of said black matrix.

8. The liquid crystal display panel according to claim 1, wherein said switching elements are thin-film field effect transistors (TFTs) and the electrodes of said switching elements are drain electrodes.