Liquid crystal display device and fabricating method thereof

• US 7,417,696 B2
• Filed: 04/24/2001
• Issued: 08/26/2008
• Est. Priority Date: 05/19/2000
• Status: Expired due to Term

• Current Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lim, Joo Soo, Kang, In Byeong
• Primary Examiner(s): QI, ZHI QIANG
• Application Number:
  US09/840,082
• Publication Number:
  US 20010046005A1
• Time in Patent Office: 2,681 Days
• Field of Search: 349/44, 349/38, 349/110, 349/111, 349/43
• US Class Current: 349/110
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

A liquid crystal display device includes a pixel electrode at a pixel area between a gate line and a data line, a switching device at an intersection between the gate line and the data line, the switching device comprising a light-shielding member overlapping the switching device and extending from an end at the pixel electrode side of a metal thin film provided within the switching device into the pixel area, for blocking light incident on the metal thin film.

Claims

1. A liquid crystal display device comprising:

a plurality of gate lines arranged in a first direction;

a plurality of data lines arranged in a second direction to cross the plurality of gate lines, at least one pixel area being defined between one of the gate lines and an adjacent one of the gate lines and between one of the data lines and an adjacent one of the data lines;

a pixel electrode disposed in the pixel area;

a thin film transistor at an intersection between the one of the gate lines and the one of the data lines, the thin film transistor including a drain electrode of a first metal thin film connected to the pixel electrode;

a second metal thin film over the adjacent one of the gate lines and overlapping the pixel electrode to define a storage capacitor, the second metal thin film extended into the pixel area with a width in the first direction less than a separation between the one of the data lines and the adjacent one of the data lines so that the second metal thin film is separated with respect to the first direction from the one of the data lines and the adjacent one of the data lines;

a black matrix disposed completely covering the plurality of gate lines and the plurality of data lines;

a first light-shielding member extended from the black matrix into the pixel area to completely cover the thin film transistor; and

a second light shielding member extended from the black matrix into the pixel area to completely cover the second metal thin film, the second light shielding member having a width in the first direction greater than that of the second metal thin film but less than a separation between the one of the data lines and the adjacent one of the data lines so that the second light shielding member is separated with respect to the first direction from the one of the data lines and the adjacent one of the data lines,

wherein the first and second light shielding members each extend into the pixel area to provide a margin sufficient to block light incident on the first and second metal films.