Method for forming braun tube's fluorescent layer
AssigneeSamsung Display Devices Co., Ltd.
InventorMin-Ho Kim
Life of this patent
Estimating the term…
Abstract
A method for electrophotographically forming a Braun tube's fluorescent layer coats conductive and photoconductive layers on the internal surface of a Braun tube's panel. The photoconductive layer is formed of a water soluble photoconductive liquid including a water soluble binder, allowing a part of the photoconductive layer to be selectively exposed to a visible ray. The photoresist of the above photoconductive liquid is substituted with dye, which can be processed through general exposure and solvent, allowing the fluorescent layer to be formed on a Braun tube under the same conditions as a typical Braun tube production process without darkroom processing.
Claims14
A method for forming a Braun tube's fluorescent layer comprising the steps of
- (a) electrophotographically coating conductive and photoconductive layers on an internal surface of a Braun tube's panel with a photoconductive material for said photoconductive layer comprising:
- a water soluble polyacetone acrylamide as a binder;
- a balance of water as a solvent for said binder;
- 4-diazo diphenylamine 1/2 zincchloride formaldehyde as a dye;
- and
- 4-4'-diazido stilbene 2,2'-disulfonic acid sodium salt as a solvent for said dye;
- wherein said photoconductive material comprises 10 wt % of polyacetone acrylamide as said binder, a balance of water as said solvent for said binder, said dye of 0.1 wt % of 4-diazo diphenylamine 1/2 zincchloride formaldehyde, and 0.3 wt % of 4-4'diazido stilbene 2,2'-disulfonic acid sodium salt as said solvent for said dye;
- (b) selectively exposing at least a part of said photoconductive layer to a visible ray;
- and
- (c) developing said photoconductive material to form said fluorescent layer.
A method for forming a Braun tube's fluorescent layer comprising the steps of
- (a) electrophotographically coating conductive and photoconductive layers on an internal surface of a Braun tube's panel with a photoconductive material for said photoconductive layer comprising:
- a water soluble polyacetone acrylamide as a binder;
- a balance of water as a solvent for said binder;
- 4-diazo diphenylamine 1/2 zincchloride formaldehyde as a dye;
- and
- 4-4'-diazido stilbene 2,2'-disulfonic acid sodium salt as a solvent for said dye;
- wherein said photoconductive material comprises 10 wt % of polyacetone acrylamide as said binder, balance of water as said solvent for said binder, said dye of 0.2 wt % of 4-diazo diphenylamine 1/2 zincchloride formaldehyde, and 0.2 wt % of 4-4'diazido stilbene 2,2'-disulfonic acid sodium salt as said solvent for said dye;
- (b) selectively exposing at least a part of said photoconductive laver to a visible ray;
- and
- (c) developing said photoconductive material to form said fluorescent layer.
Dependencies are inferred from the claim text.