Beam index color display system

Details Beam index color display system Beam index color display system

1981-06-05

1983-10-04

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

340750, 340798, H04N 922, H04N 924

Patent

active

044082231

ABSTRACT:
A display system is disclosed for receiving video data from a character generator and for applying that data to a beam index tube. The system includes a memory for storing data received from the character generator and for outputting the stored data in response to an index clock signal which is derived from a conventional index signal generated by the tube. Output circuitry receives the data from the memory and outputs that data to the tube at the proper times for illuminating phosphors within the tube. The preferred embodiment also drives the tube's beam current in a manner which develops a video image having improved contrast.

REFERENCES:
patent: 4177462 (1979-12-01), Chung
patent: 4193071 (1980-03-01), Hasegawa et al.
patent: 4247869 (1981-01-01), Culter et al.

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