LIQUID CRYSTAL DISPLAY APPARATUS

• US 20170343861A1
• Filed: 08/16/2017
• Published: 11/30/2017
• Est. Priority Date: 11/08/2012
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Suwa, Shunichi, Miyakawa, Masashi, Kobayashi, Chikashi, Nagase, Yoji
• Granted Patent: US 10,754,200 B2
• Time in Patent Office: Days
• 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 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/133776 having structures locally influencing the alignment, e.g. unevenness
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement

Abstract

According to some aspects, a liquid crystal display panel comprising an electrode is provided. The electrode comprises a plurality of convex branch electrode portions arranged in a plane, the convex branch electrode portions being convex when viewed from a first direction perpendicular to the plane and extending from a central region of the electrode to a periphery of the electrode, and a plurality of concave branch electrode portions, the concave branch electrode portions being concave when viewed from the first direction, extending from the central region to the periphery and adjacent to convex branch electrode portions. According to some aspects, a method of applying a pretilt to molecules in a liquid crystal layer of a liquid crystal display panel by applying a voltage to the liquid crystal layer via first and second electrodes is provided.

Claims

1. A liquid crystal display apparatus, comprising:

an arrangement of a plurality of pixels, wherein each pixel of the plurality of pixels comprises;

a first substrate and a second substrate;

a first electrode on an opposed surface of the first substrate, wherein the first electrode faces the second substrate;

a first alignment film that covers the first electrode and the opposed surface of the first substrate;

a second electrode on an opposed surface of the second substrate, wherein the second electrode faces the first substrate;

a second alignment film that covers the second electrode and the opposed surface of the second substrate; and

a liquid crystal layer that includes a plurality of liquid crystal molecules between the first alignment film and the second alignment film,

wherein the first electrode comprises a slit portion and a plurality of concave and convex portions.

2. The liquid crystal display apparatus according to claim 1, wherein each of the plurality of liquid crystal molecules are pre-tilted.

3. The liquid crystal display apparatus according to claim 1, wherein a first convex portion of the plurality of concave and convex portions comprises the slit portion.

4. The liquid crystal display apparatus according to claim 1, wherein the slit portion is in a region of the first electrode that includes a central region of a corresponding pixel of the plurality of pixels.

5. The liquid crystal display apparatus according to claim 1, wherein the first electrode comprises a recess in a central region of a corresponding pixel of the plurality of pixels.

6. The liquid crystal display apparatus according to claim 5, wherein each of the plurality of concave and convex portions are electrically interconnected.

7. The liquid crystal display apparatus according to claim 1, wherein the slit portion is in a region other than a periphery of a corresponding pixel of the plurality of pixels.

8. A liquid crystal display apparatus, comprising:

an arrangement of a plurality of pixels, wherein each pixel of the plurality of pixels comprises;

a first substrate and a second substrate;

a first electrode on an opposed surface of the first substrate, wherein the first electrode faces the second substrate;

a first alignment film that covers the first electrode and the opposed surface of the first substrate;

a second electrode on an opposed surface of the second substrate, wherein the second electrode faces the first substrate;

a second alignment film that covers the second electrode and the opposed surface of the second substrate; and

a liquid crystal layer that includes a plurality of liquid crystal molecules between the first alignment film and the second alignment film,

wherein the first electrode comprises a recess in a central region of a corresponding pixel, and a plurality of concave and convex portions.

9. The liquid crystal display apparatus according to claim 8, wherein each of the plurality of liquid crystal molecules are pre-tilted.

10. The liquid crystal display apparatus according to claim 8, wherein a central part of the recess is in a contact hole.

11. The liquid crystal display apparatus according to claim 8, wherein each of the plurality of concave and convex portions are electrically interconnected.