Self calibrating brightness controls for digitally operated liqu

Details Self calibrating brightness controls for digitally operated liqu Self calibrating brightness controls for digitally operated liqu

1991-08-19

1993-04-27

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

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

340793, 340715, 358 10, G09G 336

Patent

active

052066339

ABSTRACT:
A TFT LCD display has a PEL matrix in which the drain lines of the different TFTs are supplied with different drain voltages to achieve a preset number of gray scales. The different drain voltages are set during calibration through use of a test PEL having substantially the same characteristics as the PELs viewable by a user. The characteristics of the test PEL are first measured and the values of drain voltages for achieving the different gray scales are mathematically derived from the measurements. The specific manner in which this is done is by placing a photodiode next to the test PEL and measuring the photodiode outputs corresponding to different drain voltage inputs to construct a unique transmissivity versus drain voltage for the subject monitor.

REFERENCES:
patent: 4571584 (1986-02-01), Suzuki
patent: 4743096 (1988-05-01), Yakal et al.
patent: 4746970 (1988-05-01), Hosokawa et al.
patent: 4766430 (1988-08-01), Gillette et al.
patent: 4833464 (1989-05-01), Di Santo et al.
patent: 4921334 (1990-05-01), Akodes
patent: 4944578 (1990-07-01), Denison
patent: 5001481 (1991-03-01), Lee
patent: 5030947 (1991-07-01), Dieudonne et al.
patent: 5041821 (1991-08-01), Onitsuka et al.
patent: 5061920 (1991-10-01), Nelson

Affiliated with

Also associated with

Rating

Self calibrating brightness controls for digitally operated liqu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self calibrating brightness controls for digitally operated liqu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self calibrating brightness controls for digitally operated liqu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2330855