Liquid crystal display substrate, method of manufacturing the same, and liquid crystal display device having the same

• US 7,298,436 B2
• Filed: 09/15/2004
• Issued: 11/20/2007
• Est. Priority Date: 03/31/2004
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation, Fujitsu Limited
• Inventors: Tanaka, Yoshinori, Misaki, Katsunori, Doi, Seiji
• Primary Examiner(s): Qi; Mike
• Assistant Examiner(s): Chung; David Y.
• Application Number:
  US10/941,520
• Publication Number:
  US 20050219444A1
• Time in Patent Office: 1,161 Days
• Field of Search: 349/110, 349/111, 349/113, 349/114
• US Class Current: 349/110
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

Abstract

A liquid crystal display substrate capable of providing good reflection display characteristics, a method of manufacturing the same, and a liquid crystal display device having the same are provided. The liquid crystal display substrate contains a plurality of pixel areas each having a reflection area reflecting light incident from a front surface side of the substrate and a transmission area transmitting light incident from a back surface side of the substrate; a wrinkled resin layer formed with a positive light-sensitive resin in the reflection area and having at least a portion thereof a wrinkled surface; a reflection electrode formed with a light reflection material on the wrinkled resin layer and having a wrinkled surface following the surface of the wrinkled resin layer; and light shielding portions formed as an underlayer of the wrinkled resin layer and shielding light incident from the back surface of the substrate.

Claims

1. A liquid crystal display substrate comprising:

a plurality of pixel areas each having at least a portion thereof a reflection area reflecting light incident from a front surface side of the substrate;

a wrinkled resin layer formed with a positive light-sensitive resin in the reflection area, the wrinkled resin layer having at least a portion thereof a wrinkled surface;

a reflection electrode formed with a light reflection material on the wrinkled resin layer, the reflection electrode having a wrinkled surface following the surface of the wrinkled resin layer; and

a light shielding portion formed as an underlayer of the wrinkled resin layer, the light shielding portion shielding light incident from a back surface side of the substrate,

wherein the plurality of pixel areas each has a transmission area having a transparent electrode formed therein that transmits light incident from the back surface side of the substrate to the front surface side of the substrate; and

at least a portion of the light shielding portion is formed with the same material as the transparent electrode.

2. A liquid crystal display substrate as claimed in claim 1, wherein the light shielding portion comprises an underlayer formed with the same material as the transparent electrode, and an upper layer formed with a material having light shielding capability on the underlayer and patterned in substantially the same shape as the underlayer.

3. A liquid crystal display device comprising a pair of substrates facing each other and a liquid crystal sealed between the pair of substrates,

one of the pair of substrates comprises a liquid crystal display substrate as claimed in claim 1.