Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-03-11
2008-03-11
Shankar, Vijay (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S095000, C345S204000, C345S210000, C345S213000
Reexamination Certificate
active
10603067
ABSTRACT:
A drive control circuit supplies a gate voltage so that display quality is not degraded even in a case where a vertical scanning frequency or a horizontal scanning frequency is changed. The circuit includes a timing controller for detecting a change of a horizontal scanning frequency, a gate voltage generating circuit for generating two kinds of gate-on voltages Va and Vb (Va<Vb), and a switch for outputting one of the gate-on voltages Va and Vb from the gate voltage generating circuit in accordance with an output of the timing controller. The timing controller includes a counter for counting the number of clocks for one horizontal period, and a comparator for comparing a count result with a threshold value. When the horizontal scanning frequency is in a normal state, the low gate-on voltage Va is outputted, and when the horizontal scanning frequency exceeds a predetermined threshold value, that is, the count value falls below a threshold value, the high gate-on voltage Vb is outputted.
REFERENCES:
patent: 4128846 (1978-12-01), Robinson, Jr.
patent: 5398040 (1995-03-01), Ogino et al.
patent: 5748167 (1998-05-01), Watanabe et al.
patent: 5754249 (1998-05-01), Zhaog
patent: 6245590 (2001-06-01), Wine et al.
patent: 6313813 (2001-11-01), Narui et al.
patent: 6816131 (2004-11-01), Narui et al.
patent: 05-196914 (1993-08-01), None
patent: 06-230342 (1994-08-01), None
patent: 08-054859 (1996-02-01), None
patent: 10-319914 (1998-12-01), None
patent: 11-109925 (1999-04-01), None
patent: 11-184436 (1999-07-01), None
Furukoshi Yasutake
Hiraki Katsuyoshi
Katagawa Koichi
Kobayashi Tetsuya
Nishido Masanori
Greer Burns & Crain Ltd.
Shankar Vijay
Sharp Kabushiki Kaisha
LandOfFree
Driving method and drive control circuit of liquid crystal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Driving method and drive control circuit of liquid crystal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Driving method and drive control circuit of liquid crystal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3947278