Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1986-10-02
1988-06-21
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Screen
313422, 313466, 358 67, 358 68, H01J 2932, H04N 924
Patent
active
047527161
ABSTRACT:
A beam-index type color cathode ray tube device which comprises a color cathode ray tube having a front panel portion and a screen panel portion provided with a phosphor screen shaped rectangularly to include a plurality of color phosphor stripes accompanied with index phosphor on its inner surface facing the front panel portion, a luminescence receiving plate member disposed at the outside of said screen panel portion of receiving fluorescence from the index phosphor and producing secondary fluorescence. The luminescence receiving plate member is shaped to have first and second cut-out side portions which are positioned to be close respectively to two corners of the phosphor screen each including a part of one of the top and bottom ends of the same so as to look toward a central part of the luminescence receiving plate member. A first fluorescence detector is attached to the first cut-out side portion for detecting the secondary fluorescence produced in the luminescence receiving plate member. A second fluorescence detector is attached to the second cut-out side portion for detecting the secondary fluorescence produced in the luminescence receiving plate member.
REFERENCES:
patent: 4635106 (1987-01-01), Shinkai
patent: 4654559 (1987-03-01), Hinotani
Moore David K.
Powell Mark R.
Sony Corporation
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