Method and apparatus for gray scale modulation of a matrix displ

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

345 89, 345 90, 345100, G09G 336

Patent

active

057678235

ABSTRACT:
Gray scale modulation of a field emission display is provided by sampling the video data portion of an NTSC signal to obtain a plurality of samples corresponding in time to the position of the emitters in each row of the display. The samples are used to generate respective pulses having a width corresponding to the magnitudes of the samples. The pulses drive the respective emitters low during the horizontal retrace portion of the NTSC signal. The extraction grids in a selected row are driven high during the horizontal retrace portion to cause the emitter in the selected row and column to emit electrons. The extraction grids in the selected row are then driven low at the end of the horizontal retrace period to terminate the emission of electrons.

REFERENCES:
patent: 3955211 (1976-05-01), Peltier et al.
patent: 4427978 (1984-01-01), Williams
patent: 4554539 (1985-11-01), Graves
patent: 4771278 (1988-09-01), Pooley
patent: 5036317 (1991-07-01), Buzak
patent: 5436635 (1995-07-01), Takahara et al.
patent: 5485293 (1996-01-01), Robinder
patent: 5625373 (1997-04-01), Johnson

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for gray scale modulation of a matrix displ does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for gray scale modulation of a matrix displ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for gray scale modulation of a matrix displ will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1730920

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.