Active-matrix board having top and bottom light shielding films

Details Active-matrix board having top and bottom light shielding films Active-matrix board having top and bottom light shielding films

1996-09-12

1998-09-22

Tran, Minh-Loan

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Electromagnetic or particle radiation

257294, 349 44, 349110, H01L 310232

Patent

active

058118667

ABSTRACT:
An active-matrix board has a first light shield film disposed on a face side of a thin-film transistor, for blocking light applied toward the thin-film transistor, and a second light shield film disposed on a reverse side of the transparent insulating substrate and positioned across the transparent insulating substrate from the first light shield film, for blocking light applied toward the thin-film transistor. Light applied to both the sides of transparent insulating substrate is prevented from reaching the thin-film transistor by the first and second light shield films. An increase in an OFF current generated by the thin-film transistor due to light excitation is eliminated for thereby preventing the contrast of a displayed image from being lowered.

REFERENCES:
patent: 5377031 (1994-12-01), Vu et al.

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