Focusing and screen calibration method for display screen couple

Details Focusing and screen calibration method for display screen couple Focusing and screen calibration method for display screen couple

1987-04-13

1988-06-28

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

324121R, 324404, 358101, 358107, 358903, 364551, H04N 718, H04N 1704

Patent

active

047543299

ABSTRACT:
A method of focusing and calibrating a display screen which is coupled to a video camera where the display screen is not visible when performing the calibration. The method includes the steps of generating a reference signal to display an image on the display screen, capturing an image of the display signal in the video camera and converting the image into digital signals representing the brightness of pixels in a pixel matrix, analyzing the digital signals for data representing predetermined physical parameters of the visual display on the screen, and generating on a separate display screen a graphic representation of these physical parameters. By observing the bar graphs on a microcomputer at the same time that adjustments are made to the focus, intensity, and rotation controls on the oscilloscope, the display screen may be focused and calibrated.

REFERENCES:
patent: 4330779 (1982-05-01), Wilensky
patent: 4400731 (1983-08-01), Brown
patent: 4418388 (1983-11-01), Allgor
patent: 4439735 (1984-03-01), Alvite
patent: 4467323 (1984-08-01), Kling
patent: 4677340 (1987-06-01), Miller
patent: 4695833 (1987-09-01), Ogura

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