Video simulation of CRT response

Details Video simulation of CRT response Video simulation of CRT response

1993-02-26

1995-04-11

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345147, 345185, G09G 300

Patent

active

054063094

ABSTRACT:
A display memory and controller for displaying waveforms and vectors on raster-scanned conventional video monitors so that the display appears the same as oscilloscope or monitor displays. The brightness of any spot is set by the number of times that an input signal is at the same position on repetitive equivalent sweeps. As the signal passes a time and voltage point, the memory is read to determine the brightness level from before, and a new level is written in to approximate the intensity function of CRT phosphor. As the memory is displayed, the values are decreased to approximate the decay of a CRT phosphor. A memory controller allows the signal to be directly input to memory for later processing for fault determination.

REFERENCES:
patent: 4223353 (1980-09-01), Keller et al.
patent: 4504827 (1985-03-01), Hansen et al.
patent: 4829293 (1989-05-01), Schlater
patent: 4940931 (1990-07-01), Katayama et al.
Tektronix VM 700 Video Measurement Set Brochure, 1988-1989 Television Products.

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