Radiant energy – Luminophor irradiation – With ultraviolet source
Patent
1996-12-09
1998-04-28
Glick, Edward J.
Radiant energy
Luminophor irradiation
With ultraviolet source
2503601, G01J 346
Patent
active
057448094
ABSTRACT:
A chromaticity testing device of a CRT phosphor screen is provided, which enables the on-line automatic testing. A supporting member is provided for supporting a face panel of a color CRT having a phosphor screen therein. A light source emits UV light toward the phosphor screen placed on the member. A movable sensor unit senses visible light emitted from a position of the phosphor screen due to the illuminated UV light and outputs chromaticity signals for the red, green and blue components of the visible light thus sensed. A judgment section receives the chromaticity signals outputted from the sensor unit to determine the chromaticity values corresponding to the chromaticity signals thus received, and compares the chromaticity values thus determined with corresponding preset values to thereby judge whether the chromaticity values are acceptable or not. A control section controls the sensor unit and the judgment section. The sensor unit is located to be contacted with the surface of the face panel on sensing to avoid the effect of external light under the control of the control section.
REFERENCES:
patent: 4584481 (1986-04-01), Matey
patent: 5640019 (1997-06-01), Ehemann, Jr. et al.
Glick Edward J.
NEC Corporation
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