Patent ID: 6165546
Filing Date: 2000-12-26
Classification: G02B,H01J,Y10T

Abstract:
A process of preparing a multiple band pass filter for contrast enhancement of a color display, said filter comprising a uniform layer having a plurality of dyes intermixed in a polymer matrix, wherein said dyes substantially selectively transmit predetermined primary color wavelengths of an electromagnetic visible spectrum as well as selectively absorb wavelengths other than said predetermined primary color wavelengths comprising:(a) dissolving a polymer matrix resin of said polymer matrix in a suitable solvent to form a first solution;(b) dissolving said plurality of dyes in a suitable solvent to form a second solution, wherein said solvent in step (a) and said solvent in step (b) are the same or different, and if different, miscible;(c) combining said first solution and said second solution; and(d) forming a film from said combined solution of step (c) by a suitable process to prepare the multiple band pass filter.