FLAT DISPLAY UNIT

Japanese Patent JPS545652

A

Across the screen is a mosaic of spaced phosphor bodies which emit light of different colors when excited by electrons. Phosphors which emit three different colors, e.g. red, green and blue, are used and are disposed in a regular repetitive array of groups of three, i.e. triads. In every other triad the phosphor body which emits the color which has the least acuity to the eye, e.g. blue, is replaced by a nonluminescent black material. The blue phosphor bodies are of a width substantially equal to the width of the penumbra of the electron beam which impinges on the blue phosphor bodies. The red and green emitting phosphor bodies are of a width substantially equal to the umbra of their corresponding electron beams which is about one-half the penumbra of the beams. The phosphor bodies are spaced apart such that the portions of the red and green impinging electron beams which do not impinge on their respective phosphor bodies impinge on nonluminescent spaces between the phosphor bodies and the center-to-center distances between adjacent phosphor bodies of like color are equal across the screen.

JIYON EE BAN RAARUTO

JP7069378A

January 17, 1979

June 12, 1978

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RCA CORP

H01J29/18; H01J29/32; H01J31/12; H01J29/46; (IPC1-7): H01J29/46; H01J31/20

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