Color cathode ray tube and method of manufacturing thereof
AssigneeHitachi, Ltd.
InventorsMasahiro Nishizawa, Norikazu Uchiyama, Maki Taniguchi, Toshio Tojo, Tomoji Oishi
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Abstract
A cathode ray tube includes a film which is formed on an outer surface of a panel portion. The film is comprised of a first particles which become transparent due to the oxidation and a second particles which are chemically and physically stable and have the light absorbing ability and the conductivity. A number of the transparent first particles is gradually increased toward a peripheral portion from the center portion of the panel portion.
Claims13
A color cathode ray tube comprising a panel portion which constitutes an image display surface, a neck portion housing an electron gun and a funnel portion which connects the panel portion and the neck portion, wherein:
- the panel portion includes a light transmission control layer and a low refractive index layer, and
- the light transmission control layer including lint particles which become transparent at least in part due to the irradiation of light and second particles having light absorbing ability and conductivity, and a number of the first particles is gradually increased toward a peripheral portion of the panel portion from a center portion of the panel portion, and
- the low refractive index layer has a refractive index lower than a refractive index of the light transmission control layer and is formed as a layer above the light transmission control layer.
Dependencies are inferred from the claim text.