Multi-domain liquid crystal display device having field affecting electrode

(54) MULTI-DOMAIN LIQUID CRYSTAL DISPLAY DEVICE HAVING FIELD AFFECTING ELECTRODE

(75) Inventor: Yun Bok Lee, Anyang (KR)

(73) Assignee: LG. Philips LCD Co., Ltd., Seoul (KR)

( * ) Notice: This patent issued on a continued prosecution application filed under 37 CFR 1.53(d), and is subject to the twenty year patent term provisions of 35 U.S.C. 154(a)(2).

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FOREIGN PATENT DOCUMENTS

EP 0 752 611 1/1997

EP 0 814 142 12/1997

EP 0 854 377 7/1998

Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.

(21) Appl. No.: 09/357,247

(22) Filed: Jul. 20, 1999

(30) Foreign Application Priority Data

Jul. 23, 1998 (KR) 98-29764

Apr. 1, 1999 (KR) 99-11389

(51) Int. CI.7 G02F 1/1337; G02F 1/1333;

G02F 1/1343; G02F 1/1335

(52) U.S. CI 349/129; 349/138; 349/143;

349/123; 349/117

(58) Field of Search 349/125, 38, 106,

349/143, 138, 123, 124, 126, 117

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Primary Examiner—-William L. Sikes

Assistant Examiner—Tarifur R. Chowdhury

(74) Attorney, Agent, or Firm—McKenna Long & Alridge

LLP

(57) ABSTRACT

The present multi-domain liquid crystal display device includes first and second substrates facing each other, a liquid crystal layer between the first and second substrates, a plurality of gate bus lines arranged in a first direction on the first substrate and a plurality of data bus lines arranged in a second direction on the first substrate to define a pixel region, a thin film transistor positioned at a crossing area of the data bus line and the gate bus line and comprising a gate electrode, a semiconductor layer, and source/drain electrodes, a pixel electrode in the pixel region, a subsidiary electrode on the second substrate, a color filter layer on the subsidiary electrode, a common electrode on the color filter layer, and an alignment layer on at least one substrate between the first and second substrates.

40 Claims, 17 Drawing Sheets

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* cited by examiner