Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2007-09-04
2007-09-04
Yenke, Brian P. (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S671000, C348S674000, C348S678000, C348S687000, C345S589000, C382S274000
Reexamination Certificate
active
10752170
ABSTRACT:
Embodiments of the invention provide a video display technique with which a stable video with a high contrast can be obtained according to brightness of a screen. In one embodiment, a video signal processing system for a video display apparatus which performs display on the basis of a video signal comprises a gain control module configured to provide a feedback signal based upon maximum luminance level information and average luminance level information of a luminance signal corresponding to the video signal, the feedback signal being used to control a gain of the luminance signal; and a correction module configured to apply a gamma correction based upon the average luminance level information to the video signal after the gain of the luminance signal has been controlled by the gain control module.
REFERENCES:
patent: 4489349 (1984-12-01), Okada
patent: 4799106 (1989-01-01), Moore et al.
patent: 4829381 (1989-05-01), Song et al.
patent: 5089890 (1992-02-01), Takayama
patent: 6215529 (2001-04-01), Sugimoto et al.
patent: 6271891 (2001-08-01), Ogawa et al.
patent: 6317157 (2001-11-01), Takayama
patent: 6344857 (2002-02-01), Matono et al.
patent: 6633343 (2003-10-01), Ito et al.
patent: 6654028 (2003-11-01), Yamakawa
patent: 6677992 (2004-01-01), Matsumoto et al.
patent: 6795053 (2004-09-01), Funamoto et al.
patent: 6850214 (2005-02-01), Nishitani et al.
patent: 7027016 (2006-04-01), Sakashita
patent: 7034895 (2006-04-01), Okunuki et al.
patent: 7034896 (2006-04-01), Ito et al.
patent: 2003/0156225 (2003-08-01), Ito et al.
patent: 2004/0042676 (2004-03-01), Srinivasa
patent: 2005/0226526 (2005-10-01), Mitsunaga
patent: 0459366 (1991-12-01), None
patent: 1111578 (2001-06-01), None
patent: 06-169437 (1994-06-01), None
patent: 08-317250 (1996-11-01), None
patent: 08-317250 (1996-11-01), None
patent: 2000-172218 (2000-06-01), None
patent: 2001-134235 (2001-05-01), None
patent: 2002-041007 (2002-02-01), None
patent: 2000-0033617 (2000-06-01), None
patent: WO02/102059 (2002-12-01), None
State Intellectual Property Office of China (SIPO) office action dated Jan. 6, 2006 for SIPO patent application CN2004-10034603.
Aoki Hiroshi
Hasegawa Ryo
Ohyama Toshiaki
Hitachi , Ltd.
Yenke Brian P.
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