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RESEARCH AND DEVELOPMENT OF TWO-COLOR TUBES
HUGHES AIRCRAFT CO CULVER CITY CALIF
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A direct-view storage tube was developed which is capable of displaying stored information in either of 2 colors or in intermediate hues. The operating principle is based on the fact that flood electrons which pass through the holes in the storage mask when the storage-surface potential is near cutoff fall within small areas on the viewing screen opposite the storage-mask holes, whereas flood electrons which pass through the holes when the potential is near its maximum, i.e., flood-gun-cathode potential, fall on larger overlapping areas on the viewing screen. The viewing screen consists of a pattern incorporating 2 phosphors one occupies small areas in register with the storage-mask holes, and the other occupies areas surrounding the first. The tube, which is 10 inches in diameter, can be operated with simple circuitry, essentially the same as that required for conventional halftone storage tubes. Author
APPROVED FOR PUBLIC RELEASE