Patent EP0249991A2 successfully refreshed from Google Patents.
EP0249991A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Color filter arrays
Assignee: Eastman Kodak Co
•
Filing: 1987-06-19
•
Granted: —
•
Expires: 2007-06-19
Abstract
Abstract A color filter array is disclosed comprised of red, green, and blue filters forming an interlaid pattern. Each of the red, green, and blue filters is formed of two superimposed filter layers, each made up of a different subtractive primary dye (M1, Y1, C1 and C2). Layers of controlled thickness containing a single dye permit precise control of filter density and hue. The color filter array can form part of a viewable display unit or form part of an image sensor.
Inventors
- 👤 Laurel Jean Pace
- 👤 Jeffrey Carlyle Blood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 22:25
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/80; H10F39/805; H10F39/8053; G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; H10F39/10; H10F39/12; H10F39/15; H10F39/156; H10F77/00; H10F77/30; H10F77/306; H10F77/331
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A filter array comprised of interlaid sets of laterally displaced first, second, and third additive primary filters, characterized in that said sets of filters are comprised of two discrete bottom layers, one bottom layer containing a first subtractive primary dye forming a bottom layer of said first and second filters and a second bottom layer containing a second subtractive primary dye forming a bottom layer of said third filters and said sets of filters being formed of two discrete overlying layers, one overlying layer containing said second subtractive primary dye forming an overlying layer of said first filters and a second overlying layer containing a third subtractive primary dye forming an overlying layer of said second and third filters, at least one of said bottom and overlying layers being of controlled thickness and containing a single subtractive primary dye.
Claim 2
Dependent Claim
139 words
A filter array comprised of interlaid sets of laterally displaced first, second, and third additive primary filters, characterized in that said sets of filters are comprised of two discrete bottom layers, one bottom layer containing a first subtractive primary dye forming a bottom layer of said first and second filters and a second bottom layer containing a second subtractive primary dye forming a bottom layer of said third filters and said sets of filters being formed of two discrete overlying layers, one overlying layer containing said second subtractive primary dye forming an overlying layer of said first filters and a second overlying layer containing a third subtractive primary dye forming an overlying layer of said second and third filters, at least one of said bottom and overlying layers being of controlled thickness and containing a single subtractive primary dye.
Claim 3
Dependent Claim
35 words
A filter array according to claim 1 further characterized in that said overlying layer containing said second additive primary dye is an integral lateral extension of said bottom layer containing said second additive primary dye.
Claim 4
Dependent Claim
25 words
A filter array according to claim 1 or 2 further characterized in that said layer of controlled thickness is comprised of a hardened hydrophilic colloid.
Claim 5
Dependent Claim
24 words
A filter array according to claim 1, 2, or 3 further characterized in that said layer of controlled thickness is comprised of a photoresist.
Claim 6
Dependent Claim
22 words
A filter array according to claim 4 further characterized in that said layer of controlled thickness is comprised of a diazo resin.
Claim 7
Dependent Claim
33 words
A filter array according to claim 1, 2, or 3 further characterized in that said layer of controlled thickness is comprised of a mordant and said subtractive primary dye is an ionic dye.
Claim 8
Dependent Claim
32 words
A filter array according to any one of claims 1 through 6 further characterized in that each of said filter layers is of controlled thickness and contains a single subtractive primary dye.
Claim 9
Dependent Claim
41 words
A filter array according to any one of claim 1 through 7 further characterized in that each of said filter layers is a photopatterned layer comprised of a diazo resin and a cationic mordant saturated with an anionic subtractive primary dye.
Claim 10
Dependent Claim
48 words
A light sensing semiconductor device including an array of light sensing pixels each less than 1 × 10⁻⁸ m² in area comprised of a semiconductive substrate including a light sensing portion in each pixel area and a filter array according to any one of claims 1 through 8.
Claim 11
Independent Claim
63 words
A device for displaying color images on a viewable surface comprised of a plurality of laterally displaced pixel areas, means for modulating within each pixel area the luminance of light transmitted to the viewable surface and a filter array according to any one of claims 1 through 8 for controlling within each pixel area the chrominance of light transmitted to the viewable surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.