US4764670A
Expired / Lapsed
US
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Color filter arrays
Assignee: Eastman Kodak Co
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Filing: 1987-09-01
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Granted: 1988-08-16
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Expires: 2007-09-01
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. 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 J. Pace
- 👤 Jeffrey C. Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
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: 30
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
23 words
A filter array according to claim 1 further characterized in that said layer of controlled thickness is comprised of a hardened hydrophilic colloid.
Claim 5
Dependent Claim
21 words
A filter array according to claim 1 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
30 words
A filter array according to claim 1 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
27 words
A filter array according to claim 1 further characterized in that each of said filter layers is of controlled thickness and contains a single subtractive primary dye.
Claim 9
Dependent Claim
36 words
A filter array according to claim 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
185 words
A light sensing semiconductor device including an array of light sensing pixels each less than 1×10 -8 m 2 in area comprised of a semiconductive substrate including a light sensing portion in each pixel area and a filter array for directing light to said semiconductive substrate comprised of interlaid sets of laterally displaced first, second, and third additive primary filters, each filter overlying one pixel, 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 filters are comprised 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 11
Dependent Claim
185 words
A light sensing semiconductor device including an array of light sensing pixels each less than 1×10 -8 m 2 in area comprised of a semiconductive substrate including a light sensing portion in each pixel area and a filter array for directing light to said semiconductive substrate comprised of interlaid sets of laterally displaced first, second, and third additive primary filters, each filter overlying one pixel, 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 filters are comprised 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 12
Dependent Claim
35 words
A sensing device according to claim 10 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 13
Dependent Claim
23 words
A sensing device according to claim 10 further characterized in that said layer of controlled thickness is comprised of a hardened hydrophilic colloid.
Claim 14
Dependent Claim
21 words
A sensing device according to claim 10 further characterized in that said layer of controlled thickness is comprised of a photoresist.
Claim 15
Dependent Claim
22 words
A sensing device according to claim 13 further characterized in that said layer of controlled thickness is comprised of a diazo resin.
Claim 16
Dependent Claim
30 words
A sensing device according to claim 10 further characterized in that said layer of controlled thickness is comprised of a mordant and said subtractive primary dye is an ionic dye.
Claim 17
Dependent Claim
27 words
A sensing device according to claim 10 further characterized in that each of said filter layers is of controlled thickness and contains a single subtractive primary dye.
Claim 18
Dependent Claim
36 words
A sensing device according to claim 15 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 19
Dependent Claim
20 words
A sensing device according to claim 10 further characterized in that each pixel of said semiconductive device includes a photodiode.
Claim 20
Dependent Claim
22 words
A sensing device according to claim 10 further characterized in that a separate lens is provided overlying each filter within each pixel.
Claim 21
Independent Claim
190 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 for controlling within each pixel area the chrominance of light transmitted to the viewable surface 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 are comprised of two discrete overlying layers, one overlying layer containing said second subtractive primary dye forming an overlying layer of said first filter and a seconf 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 22
Independent Claim
190 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 for controlling within each pixel area the chrominance of light transmitted to the viewable surface 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 are comprised of two discrete overlying layers, one overlying layer containing said second subtractive primary dye forming an overlying layer of said first filter and a seconf 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 23
Dependent Claim
36 words
An image displaying device according to claim 19 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 24
Dependent Claim
24 words
An image displaying device according to claim 19 further characterized in that said layer of controlled thickness is comprised of a hardened hydrophilic colloid.
Claim 25
Dependent Claim
25 words
An image displaying device according to claim 21 further characterized in that said layer of controlled thickness is comprised of dichromated gelatin or gelatin derivative.
Claim 26
Dependent Claim
22 words
An image displaying device according to claim 19 further characterized in that said layer of controlled thickness is comprised of a photoresist.
Claim 27
Dependent Claim
23 words
An image displaying device according to claim 23 further characterized in that said layer of controlled thickness is comprised of a diazo resin.
Claim 28
Dependent Claim
31 words
An image displaying device according to claim 19 further characterized in that said layer of controlled thickness is comprised of a mordant and said subtractive primary dye is an ionic dye.
Claim 29
Dependent Claim
28 words
An image displaying device according to claim 19 further characterized in that each of said filter layers is of controlled thickness and contains a single subtractive primary dye.
Claim 30
Dependent Claim
37 words
A image displaying device according to claim 26 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.
References Cited (Backward Citations)
US1003720A
Cited
US1191034A
Cited
US4081277A
Cited
US4294900A
Cited
EP0030476A1
Cited
US4395629A
Cited
US4315978A
Cited
US4387146A
Cited
US4307165A
Cited
US4411973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |