Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1994-11-08
1996-06-04
Patel, Nimeshkumar D.
Electric lamp and discharge devices
Cathode ray tube
Envelope
313112, 313478, 427162, 427164, 359601, 359609, H01J 2928, G02B 111
Patent
active
055236499
ABSTRACT:
A multilayer antireflective coating is applied to the outer surface of a video display panel such as a cathode ray tube (CRT) or a flat panel display in the form of successive thin layers each having a different light refractive index, where the light refractive index of each layer decreases in the direction away from the surface of the display panel and toward the outer layer of the coating. Each layer is formed from the same starting gel materials, with the degree of crosslinking of each gel layer varied to provide the desired light refractive index for reducing reflections from the display panel's outer surface over a wide spectrum. The extent of crosslinking and thus the individual layer's light refractive index is varied by controlling the aging of the gel, with longer aging providing increased crosslinking and larger molecular weight for a lower light refractive index. For example, silica gels aged over different time periods provide gels having a light refractive index ranging from 1.45 (shorter aging) to 1.18 (longer aging). An antistatic layer may be applied directly to the outer surface of the display panel before the antireflective coating is applied by adding an electrically conductive fine powder such as of tin oxide, antimony-doped tin oxide, etc. The high light refractive index of these conductive coatings, i.e., n>1.8, further improves the antireflective characteristics of the multilayer coating.
REFERENCES:
patent: 4830879 (1989-05-01), Debsikdar
patent: 5254904 (1993-10-01), Van De Leest et al.
Hu Chun-Min
Tong Hua-Sou
Chunghwa Picture Tubes Ltd.
Patel Nimeshkumar D.
LandOfFree
Multilayer antireflective coating for video display panel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multilayer antireflective coating for video display panel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayer antireflective coating for video display panel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-386119