Phosphor screen for modular flat panel display device

Details Phosphor screen for modular flat panel display device Phosphor screen for modular flat panel display device

1977-06-13

1980-09-02

Segel, Robert

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313470, H01J 2932, H01J 3120

Patent

active

042208920

ABSTRACT:
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.

REFERENCES:
patent: 2802964 (1957-08-01), Jesty
patent: 3614504 (1971-10-01), Kaplan
patent: 3904923 (1975-09-01), Schwartz
patent: 4028582 (1977-06-01), Anderson et al.
patent: 4145633 (1979-03-01), Peters et al.

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