Liquid crystal display device

• US 7,292,212 B2
• Filed: 10/27/2004
• Issued: 11/06/2007
• Est. Priority Date: 12/04/2000
• Status: Expired due to Fees

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Device Engineering Co., Ltd. (Hitachi, Ltd.), Hitachi, Ltd.
• Inventors: Iwasaki, Shinichi, Morishita, Shunsuke, Makishima, Tatsuo, Oowaki, Yoshio, Takahashi, Koji, Kitajima, Masaaki
• Primary Examiner(s): Tran; Henry N
• Application Number:
  US10/973,403
• Publication Number:
  US 20050083446A1
• Time in Patent Office: 1,105 Days
• Field of Search: 345/87, 345/92, 345/93, 345/98, 345/102, 349/110, 349139-143, 349/146
• US Class Current: 345/87
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2330/026 Arrangements or methods related to booting a display
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

A liquid crystal display device having first and second substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on the first substrate, and a plurality of thin film transistors formed proximate to a crossing point of the scanning signal lines and video signal lines. A light shielding layer is formed on the second substrate and overlapped with at least one of the thin film transistors and with at least one signal line of the scanning signal lines and the video signal lines in plane view. The light shielding layer has an aperture region which is formed proximate to the at least one thin film transistor and formed within the at least one signal line in plane view.

Claims

1. A liquid crystal display device comprising:

first and second substrates having a liquid crystal layer therebetween;

a plurality of scanning signal lines and a plurality of video signal lines formed on the first substrate;

a plurality of thin film transistors formed proximate to a crossing point of the scanning signal lines and video signal lines; and

pixel electrodes connected to the scanning signal lines and the video signal lines through the thin film transistors;

a light shielding layer formed on the second substrate and overlapped with at least one thin film transistor and with at least one signal line of the scanning signal lines and the video signal lines in plane view;

wherein the light shielding layer has a first aperture region and a second aperture region, the first aperture region being formed over at least one of the pixel electrodes and the second aperture region being formed proximate to the at least one thin film transistor and formed within the at least one signal line in plane view.

2. A liquid crystal display device according to claim 1, wherein the at least one signal line is scanning signal line.

3. A liquid crystal display device according to claim 2, wherein the second aperture region has a rectangular shape.

4. A liquid crystal display device according to claim 3, wherein one edge of the second aperture region is parallel with at least one edge of the scanning signal line.

5. A liquid crystal display device according to claim 1, wherein the second aperture region has rectangular shape.

6. A liquid crystal display device according to claim 5, wherein one edge of the second aperture region is parallel with one edge of the at least one signal line.