Process for manufacturing fluorescent film of a color braun tube
AssigneeLG Electronics Inc.
InventorsSeoug Wan Kang, Kyung Ho Lee
Life of this patent
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Abstract
The present invention is to provide a process for manufacturing a fluorescent film wherein the order of coating the fluorescent films of a color Braun tube and the thickness of the film are adjusted to reduce the amount of red fluorescent material employed for red fluorescent film without deteriorating the quality of the red fluorescent film, thereby lowering the cost for manufacturing. The process first forms the red fluorescent film on the panel of a color Braun tube and then forms the blue and green fluorescent films subsequently thereafter.
Claims16
A method for manufacturing a fluorescent film on a screen for a color braun tube comprising the steps of:
- forming a black matrix of a light-absorbing material on the screen, the matrix being formed so as to expose portions of the screen;
- forming a red fluorescent film pattern on the screen having the black matrix formed thereon, wherein the screen weight of the red fluorescent film pattern is between 2.47 mg/cm2 and 3.23 mg/cm2;
- forming a blue fluorescent film pattern on the screen having the black matrix and the red fluorescent film pattern formed thereon;
- forming a green fluorescent film pattern on the screen having the black matrix and red and blue fluorescent film patterns formed thereon;
- wherein:
- (a weight of the green fluorescent film pattern per unit area)>(a weight of the red fluorescent film pattern per unit area)>(a weight of the blue fluorescent film pattern per unit area).
A method for manufacturing a fluorescent film on a screen for a color braun tube, comprising the steps of:
- forming a black matrix of a light-absorbing material on the screen, the matrix being formed so as to expose portions of the screen;
- forming a red fluorescent film pattern on the screen having the black matrix formed thereon, wherein the screen weight of the red fluorescent film pattern is between 2.47 mg/cm2 and 3.23 mg/cm2;
- forming a green fluorescent film pattern on the screen having the black matrix and the red fluorescent film pattern formed thereon;
- forming a blue fluorescent film pattern on the screen having the black matrix and red and green fluorescent film patterns formed thereon;
- wherein:
- (a weight of the green fluorescent film pattern per unit area)>(a weight of the red fluorescent film pattern per unit area)>(a weight of the blue fluorescent film pattern per unit area).
Dependencies are inferred from the claim text.