Optical: systems and elements – Absorption filter – Filters in optical parallel
Patent
1991-10-18
1993-10-05
Ben, Loha
Optical: systems and elements
Absorption filter
Filters in optical parallel
359885, 359 68, 252582, 430 7, 358 64, G02B 522
Patent
active
052510719
ABSTRACT:
The color filter according to the present invention contains black matrix formed by polyimide, which contains light shielding pigments such as carbon black, triiron tetraoxide, etc. instead of the black matrix used in the past, which is formed by metal thin film such as chromium on glass substrate. Epoxy type silane coupling agent is mixed with polyimide precursor composition, and this is coated on a glass substrate and then imidized. Thus, the color filter is provided with black matrix having high bonding strength with glass substrate.
REFERENCES:
patent: 3853296 (1989-08-01), Fukuyoshi
patent: 4846556 (1989-07-01), Haneda
patent: 4934791 (1990-06-01), Shimizu et al.
patent: 5045418 (1991-09-01), Fukuyoshi
Kusukawa Hiroyuki
Nakajima Yasuhide
Ben Loha
Dai Nippon Printing Co. Ltd.
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