Drive signal generator and image display apparatus

Details Drive signal generator and image display apparatus Drive signal generator and image display apparatus

2005-04-19

2005-04-19

Shalwala, Bipin (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S204000

Reexamination Certificate

active

06882329

ABSTRACT:
A drive signal generation circuit which performs gradation control on a load by a drive signal having a stepped waveform. In a case where the wave height value corresponding to input gradation data is Vm (2≦m≦n), the drive signal is caused to rise in such a manner that each output Vk (2≦k≦m) is produced one slot after the output V(k−1) to increase the wave height value V0(reference potential) to Vm in a stepping manner. One slot corresponds to a unit time of the pulse width modulation. The drive signal is caused to fall in such a manner that each output V(k−1) (1≦k≦m−1) is produced one or two slots after the output Vk to reduce the wave height value from Vm to off level in a stepping manner. A delay circuit is used to delay signals slot by slot. A selection is made from delayed signals according to luminance data to determine a waveform. The circuit is also designed to enable the drive signal waveform rise position to be changed.

REFERENCES:
patent: 5847933 (1998-12-01), Lostumo et al.
patent: 6294876 (2001-09-01), Ando et al.
patent: 6404135 (2002-06-01), Shino
patent: 6693375 (2004-02-01), Maruyama
patent: 20010019247 (2001-09-01), Tsukamoto
patent: 407177446 (1995-07-01), None

Affiliated with

Also associated with

Rating

Drive signal generator and image display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drive signal generator and image display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive signal generator and image display apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3440937