Matrix liquid crystal display with extended gray scale

Details Matrix liquid crystal display with extended gray scale Matrix liquid crystal display with extended gray scale

1988-07-18

1990-05-01

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

350332, 340784, 340793, 358315, 358168, 358236, 358443, G02F 113, G09G 336

Patent

active

049213342

ABSTRACT:
The perceived gray scale brightness levels of a Matrix Addressed Liquid Crystal Display are increased over the number of levels provided by the existing data line driver hardware and the gray scale voltage increments by providing an extra command bit position. For time multiplexing the gray scale voltage increment on a pixel during successive frames. For an extra bit value of 0 the gray scale voltage is the same during alternate frames providing a given brightness level. For an extra command bit value of 1, the gray scale voltage increment applied to the pixel and the brightness level, is switched (dithered) between voltages during successive frames. The eye integrates the levels and the perceived gray scale brightness level is the average value of brightness thus, doubling the number of perceived gray scale levels.

REFERENCES:
patent: 4427978 (1984-01-01), Williams
patent: 4745485 (1988-05-01), Iwasaki
patent: 4766430 (1988-08-01), Gillette et al.
patent: 4769713 (1988-09-01), Yasui
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4808991 (1989-02-01), Tachiuch et al.

Affiliated with

Also associated with

Rating

Matrix liquid crystal display with extended gray scale does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Matrix liquid crystal display with extended gray scale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Matrix liquid crystal display with extended gray scale will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-825991