Browse Prior Art Database

Black Matrix Structure for High Resolution Thin Film Transistor-Liquid Crystal Displays

IP.com Disclosure Number: IPCOM000118667D
Original Publication Date: 1997-May-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Kodate, M: AUTHOR [+3]

Abstract

Disclosed is a black matrix structure for high resolution Thin Film Transistor Liquid Crystal Displays (TFT/LCDs). This structure eliminates a photo-leakage current through a semiconducting layer of TFT.

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Black Matrix Structure for High Resolution Thin Film Transistor-Liquid

Crystal

Displays

      Disclosed is a black matrix structure for high resolution Thin
Film Transistor Liquid Crystal Displays (TFT/LCDs).  This structure
eliminates a photo-leakage current through a semiconducting layer of
TFT.

      The feature of this structure is a thin film metal layer is
sandwiched between at least two anti-reflection films on a counter
substrate, which is the opposite side plate of a TFT array
substrate.  The Figure shows an example of a cross-sectional view of
a TFT/LCD panel utilizing the present black matrix structure.  In
this example, a reflection density of an incident light from a back
light module into an LCD panel is very small.  Therefore, an incident
light upon a TFT is very weak.  Consequently, a weaker incident light
makes a  smaller photo-leakage current with a TFT.

By using this structure, high resolution displays with high-image
quality are realized.