IP Library Granted Patent US 7,623,190
Granted Patent B2
US 7,623,190 · App. 11/299,658 · Granted Nov 24, 2009

LCD device having common line extension and gate line recess of equal areas

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Quick Facts
Patent No.
US 7,623,190
App. No.
11/299,658
Granted
Nov 24, 2009
Kind
B2
Abstract

A liquid crystal display (LCD) device includes a first substrate, gate lines formed on the first substrate, data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels, thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines, common lines disposed in parallel with the gate lines, the common lines including a common line capacitance (Cdc) control portion, pixel electrodes insulated from the common lines and connected to the TFTs, a second substrate opposite to the first substrate and bonded to the first substrate, and a liquid crystal layer disposed between the first and second substrates.

Claims (24)

1. A liquid crystal display (LCD) device, comprising:

a first substrate;

gate lines formed on the first substrate;

data lines perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels;

thin film transistors (TFTs) disposed at each intersection where the gate lines cross the data lines;

common lines disposed in parallel with the gate lines;

pixel electrodes insulated from the common lines and connected to the TFTs;

a second substrate opposite to the first substrate and bonded to the first substrate; and

a liquid crystal layer disposed between the first and second substrates, and

wherein an extension is formed on each of the common lines overlapped with the data lines in the G sub-pixels,

wherein a recess is formed on each of the gate lines overlapped with the data lines in the G sub-pixels,

wherein an area of the extension is equal to an area of the recess.

2. The LCD device according to claim 1 , further including counter electrodes that contact the common lines, wherein an electric field is formed between each counter electrode and each pixel electrode.

3. A method of fabricating a liquid crystal display (LCD) device, comprising:

forming gate lines on a first substrate;

forming common lines on the first substrate in parallel with the gate lines;

forming an insulating layer over the gate lines and the common lines;

forming data lines on the insulating layer perpendicularly crossing the gate lines to define red, green, and blue (R/G/B) sub-pixels;

forming thin film transistors (TFTs) at each intersection where the gate lines cross the data lines;

forming pixel electrodes connected to the TFTs; and

attaching a second substrate onto the first substrate with a liquid crystal layer disposed therebetween, and

wherein an extension is formed on each of the common lines overlapped with the data lines in the G sub-pixels,

wherein a recess is formed on each of the gate lines overlapped with the data lines in the G sub-pixels,

wherein an area of the extension is equal to an area of the recess.

Assignments (2)
CHANGE OF NAME Recorded Jun 19, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 021147/0009 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 13, 2005
From: KIM, WOO HYUN; KIM, EUI TAE; CHANG, SUNG SOO
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 017347/0351 →