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Browse Prior Art Database

New Shield Metal of the Active Matrix-Liquid Crystal Display Pixel for Laser Repair

IP.com Disclosure Number: IPCOM000118229D
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Fujii, Y: AUTHOR [+3]

Abstract

Disclosed is an Active Matrix Liquid Crystal Display (AM-LCD) pixel structure for the new ways to repair pixel defects and line defects.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

New Shield Metal of the Active Matrix-Liquid Crystal Display Pixel
for Laser Repair

      Disclosed is an Active Matrix Liquid Crystal Display (AM-LCD)
pixel structure for the new ways to repair pixel defects and line
defects.

      Fig. 1 shows the pixel structure.  At the right side of the
pixel, a floating metal layer runs between a pixel electrode and a
signal line.  This shield metal blocks unnecessary lights from an
AM-LCD back light.  It overlaps with the signal line at each end.

      Shooting a LASER at the two points shown in Fig. 2 repairs a
pixel defect by making a short circuit.  The signal line voltage
makes the repaired pixel work as a permanent black pixel.  Without
this repair, the defect pixel works as a white pixel, which is easily
spotted.  Shooting a LASER at the two points shown in Fig. 3 repairs
a line defect by making a short circuit.  The repaired signal line
works ordinarily.