Computer graphics processing and selective visual display system – Data responsive crt display control – Crt provides display control
Patent
1991-02-11
1995-12-26
Hjerpe, Richard
Computer graphics processing and selective visual display system
Data responsive crt display control
Crt provides display control
345153, 345199, G09G 100
Patent
active
054791863
ABSTRACT:
A video monitor color control system including means for calibrating the intensity response of CRT phosphor sets to each of a plurality of electron gun control levels. Provided is a processor (24) that generates a sequence of discrete DAC signals, each DAC signal identifying an electron gun and a DAC value for driving the electron gun at a selected control level. Also provided is a monitor driver (22) connected to the processor (24) and to the monitor (20) and controllable in response to a DAC signal for driving the electron gun identified by the DAC signal at the control level identified by the DAC signal. The driven electron gun excites the associated phosphor set. A sensor (28) is provided for detecting the luminous intensity level of the phosphor excited by the electron gun, and for converting the detected intensity into a representative signal. The processor (24) receives for each discrete DAC signal the representative signals produced by the sensor and generates a look-up table for each gun defining intensity levels for each of the plurality of electron gun control levels.
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Beaton Robert J.
McManus Paul A.
Aldous Alan K.
Hjerpe Richard
Hughey Patrick W.
Preiss Richard B.
Tektronix Inc.
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