LCD device including a TFT for reducing leakage current

CAFC
  • US 7,460,190 B2
  • Filed: 08/20/2004
  • Issued: 12/02/2008
  • Est. Priority Date: 08/21/2003
  • Status: Active Grant
First Claim
Patent Images

1. A liquid crystal display (LCD) device comprising a TFT (thin-film-transistor) substrate mounting thereon a plurality of TFTs each having a channel in an ohmic contact layer and a semiconductor layer;

  • a counter substrate mounting thereon a black matrix;

    a liquid crystal layer sandwiched between said TFT substrate and said counter substrate;

    a backlight unit disposed at a rear side of said TFT substrate for irradiating said TFT substrate with backlight, said counter substrate mounting thereon a light shield overlapping said channel of said TFTs as view normal to said counter substrate; and

    a rear shield film interposed between said channel of said TFTs and said backlight unit to overlap said channel of said TFTs s viewed normal to said TFT substrate,said channel having a channel length larger at an edge portion of said channel adjacent to one of said pixels than at a central portion thereof, whereupon leakage current of said TFT at said edge portion is suppressed.

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