Color bargraph display control for use with a cathode ray tube

Details Color bargraph display control for use with a cathode ray tube Color bargraph display control for use with a cathode ray tube

1993-06-11

1994-12-13

Oberley, Alvin E.

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

345150, G09G 106

Patent

active

053733088

ABSTRACT:
A method and apparatus for displaying a bar image in two colors on a screen of a cathode ray tube are disclosed. The device includes a first memory for storing the information to be displayed, including the first color, and a second memory for storing the screen addresses where the images are to be displayed in a second color. It also includes a microprocessor for selecting information from the first memory to be displayed at specific addresses on the screen. When the address for display is the same as one stored in the second memory, the microprocessor causes information to be displayed in the second color instead of the first color.

REFERENCES:
patent: 3375509 (1968-03-01), Mullarkey
patent: 3531795 (1970-09-01), Gassler
patent: 3678498 (1972-07-01), Nagamatsu et al.
patent: 4232311 (1980-11-01), Agneta
patent: 4272767 (1981-06-01), Lacy
patent: 4484187 (1984-11-01), Brown et al.
patent: 4668465 (1987-05-01), Boomgaard et al.
patent: 4847785 (1989-07-01), Stephen

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