Display device comprising a display screen provided with a light

Details Display device comprising a display screen provided with a light Display device comprising a display screen provided with a light

1995-02-28

1996-07-09

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Cathode ray tube

Envelope

313478, 313466, 313474, 313110, 445 58, 4271264, 4271261, 252582, H01J 2989

Patent

active

055347487

ABSTRACT:
The display screen (3) of a cathode ray tube (1) is provided with a light-absorbing coating (8) comprising a hybrid inorganic-organic material consisting of an inorganic network of at least silicon oxide and a polymeric component. By means of a sol-gel process the coating can be provided in a relatively large thickness without causing crackles. Consequently, the layer can contain large quantities of dyestuff, so that said layer can very suitably be used as a chrominance or transmission coating to improve the picture contrast. Even if the display screen is not highly polished, the coating can be obtained with a high-polish and it complies with the customary mechanical, chemical and optical requirements.

REFERENCES:
patent: 4745327 (1988-05-01), Saeki et al.
patent: 4987338 (1991-01-01), Itou et al.
patent: 5315209 (1994-05-01), Iwasaki et al.

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