Display device comprising a display screen provided with a light absorbing coating
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United States of America Patent
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Jul 9, 1996
Grant Date -
N/A
app pub date -
Feb 28, 1995
filing date -
Mar 3, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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