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US 5,703,431 AGranted
Display screen and method of manufacturing the same
AssigneeKabushiki Kaisha Toshiba
InventorsTakeo Itou, Hidemi Matsuda
Life of this patent
Estimating the term…
Abstract
There is disclosed a display screen including a transparent substrate, color optical filters formed on the substrate, and a black matrix layer formed on the filters and consisting of black pigment particles. Phosphor layers are formed on the color optical filters on which the black matrix layer is formed.
Claims8
A display screen comprising:
- a transparent substrate having an inner surface and an outer surface;
- optical filter layers each containing color pigment particles having an average particle size of 0.2 .mu.m or less and each formed on said inner surface of said transparent substrate as rectangular or circular dots or stripes, the optical filter layers each having a first surface which faces the said inner surface of said transparent substrate and each having a second surface respectively opposite to each said first surface;
- a black matrix layer containing black pigment particles having an average particle size of 0.2 to 5 .mu.m and at least a part of which is formed on each said second surface of said optical filter layers formed to cover peripheral regions of said filter layers except for central portions thereof;
- and
- phosphor layers formed on said optical filter layers and having an emission color corresponding to a color of a pigment contained in said optical filter layers.
2 more elements
A method of manufacturing a display screen, comprising the steps of:
- providing a transparent substrate having an inner surface and an outer surface;
- coating and drying a color pigment dispersion containing color pigment particles having an average particle size of 0.2 .mu.m or less on said inner surface of said transparent substrate to form a color pigment layer, and patterning said color pigment layer to form color optical filter layers as rectangular or circular dots or stripes, the optical filter layers each having a first surface side which faces said inner surface of said transparent substrate and each having a second surface respectively opposite to each said first surface;
- coating and drying a black pigment dispersion containing black pigment particles having an average particle size of 0.2 to 5 .mu.m on said color optical filter layers to form a black pigment layer at least part of which is formed on each said second surface of said optical filter layers, and patterning said black pigment layer to partially remove said black pigment layer except for peripheral regions of said pigment layers so as to expose at least central portions of said optical filter layers, thereby obtaining a black matrix layer covering said peripheral regions of said color optical filter layers;
- and
- coating a slurry containing a phosphor on said color optical filter layers to form a phosphor slurry layer, and patterning said phosphor slurry layer to optionally form phosphor layers having an emission color corresponding to a color of a pigment containing said optical filter layers on said optical filter layers.
2 more elements
Dependencies are inferred from the claim text.