Digital shade control for color crt background and cursors

Details Digital shade control for color crt background and cursors Digital shade control for color crt background and cursors

G - Physics

09

G

375/11

G09G 1/28 (2006.01) G09G 5/02 (2006.01)

Patent

CA 1208818

ABSTRACT OF THE DISCLOSURE A color cathode ray tube is provided in a color monitor of a video display terminal. The red, green and blue color video input lines are connected to novel control circuits which permit the selection of several different shades of colors for the background or cursor. The circuits which control the background colors are pulse modulated to provide digital shade control of the background color selected and automatically control the color of the cursor so that a contrasting color is provided.

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