METHODS FOR MANUFACTURING PIXEL UNIT, LIQUID CRYSTAL DISPLAY PANEL, AND ELECTRO-OPTICAL APPARATUS

• US 20110212393A1
• Filed: 05/09/2011
• Published: 09/01/2011
• Est. Priority Date: 02/26/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lin, Ching-Huan, Liu, Sung-Kao, Jeng, Yue-Shih, Chiu, Chung-Hsiang
• Granted Patent: US 8,379,170 B2
• Time in Patent Office: Days
• US Class Current: 430/20
• 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 1/133757 with different alignment orientations
• CPC Class Codes: G02F 1/133761 with different pretilt angles
• CPC Class Codes: G02F 1/133788 by light irradiation, e.g. linearly polarised light photo-polymerisation
• CPC Class Codes: G02F 2201/086 UV absorbing

Abstract

A pixel unit having a display area is provided. The pixel unit includes a first substrate, a second substrate, a liquid crystal layer, and at least one ultraviolet light (UV) absorption pattern. The second substrate is disposed in parallel to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate. The UV absorption pattern is disposed between the first substrate and the second substrate. A part of the display area overlaps the UV absorption pattern to define at least one first alignment area, while the part of the display area which does not overlap the UV absorption pattern defines at least one second alignment area. The liquid crystal molecules of the liquid crystal layer present different pre-tilt angles in the first alignment area and the second alignment area.

Claims

1. A method for manufacturing a pixel unit, comprising:

providing a semi-finished pixel unit having a display area, and the pixel unit comprises;

a first substrate;

a second substrate disposed in parallel to the first substrate;

a liquid crystal layer disposed between the first substrate and the second substrate;

at least one UV absorption pattern disposed between the first substrate and the second substrate, wherein a part of the display area overlaps the UV absorption pattern to define at least one first alignment area, and the part of the display area which does not overlap the UV absorption pattern defines at least one second alignment area; and

providing an UV light, wherein the UV light irradiates the liquid crystal layer from a side of the UV absorption pattern away from the liquid crystal layer so that the liquid crystal molecules of the liquid crystal layer present different pre-tilt angles in the first alignment area and the second alignment area.

2. The method according to claim 1, further comprising producing at least one voltage difference between the first substrate and the second substrate, wherein the UV light irradiates the liquid crystal layer from a side of the UV absorption pattern away from the liquid crystal layer under the voltage difference so that the liquid crystal molecules of the liquid crystal layer present different pre-tilt angle in the first alignment area and the second alignment area.

3. The method according to claim 1, further comprising mixing a plurality of polymerize-able molecules into the liquid crystal layer, wherein the polymerize-able molecules form a polymer layer on at least one of a part of the first substrate and a part of the second substrate after the UV irradiates the liquid crystal layer, the polymer layer is directly contacted with the liquid crystal layer, so that the liquid crystal molecules of the liquid crystal layer present different pre-tilt angles in the first alignment area and the second alignment area.

4. The method according to claim 1, further comprising forming at least one dielectric layer and at least one common electrode on the first substrate, so that the common electrode is located between the dielectric layer and the liquid crystal layer.

5. The method according to claim 1, further comprising forming at least one pixel electrode and at least one dielectric layer on the second substrate, so that the pixel electrode is located between the dielectric layer and the liquid crystal layer.

6. The method according to claim 5, further comprising forming at least one scan line, at least one data line, and at least one active device on the second substrate, so that the data line intersects the scan line, the active device is electrically connected to the scan line and the data line, and the pixel electrode is electrically connected to the active device.

7. A method for manufacturing a LCD panel, comprising the method for manufacturing a pixel unit according to claim 1.

8. A method for manufacturing an electro-optical apparatus, comprising the method for manufacturing a LCD panel according to claim 7.