Television signal display apparatus with picture quality compens

Details Television signal display apparatus with picture quality compens Television signal display apparatus with picture quality compens

1996-05-08

1998-07-21

Hsia, Sherrie

Television

Basic receiver with additional function

Multimode

348558, 348445, H04N 546

Patent

active

057841233

ABSTRACT:
A television signal display apparatus includes a main picture quality adjustment value memory for storing a picture quality adjustment value set according to a viewer's preference; a sub picture quality adjustment value memory for storing a picture quality adjustment value preliminarily set for every aspect ratio; a microcomputer for calculating an optimum picture quality adjustment value for a new aspect ratio from the picture quality adjustment values read from the main and sub picture quality adjustment value memories, setting the optimum picture quality adjustment value in a picture quality adjusting circuit and making an aspect ratio selecting circuit work. When the aspect ratio is changed, the viewer can watch a picture having the same picture quality as before the change without the incongruity due to picture quality differences produced by the aspect ratio selection when the picture is of such low luminance that ABL does not function properly.

REFERENCES:
patent: 5146331 (1992-09-01), Tsuchida
patent: 5384600 (1995-01-01), Kaizaki
N. Nakagaki et al., "Wide Aspect TV Receiver with Aspect Detection and Non-Linear Control for Picture Quality", IEEE Transactions on Consumer Electronics, vol. 40, No. 3, pp. 743-751 (Aug. 1994).
European Search Report dated Mar. 5, 1997.

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