Patent US4786148A successfully refreshed from Google Patents.
US4786148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color filter having different primary color pigment densities, inter alia
Assignee: Canon Inc
•
Filing: 1987-12-09
•
Granted: 1988-11-22
•
Expires: 2007-12-09
Abstract
Abstract A color filter comprises a substrate and colored resin films, disposed on the support, including a blue resin film containing blue colorant particles dispersed therein, a green resin film containing green colorant particles dispersed therein and a red resin film containing red colorant particles dispersed therein. Scattering characteristic from the respective colored resin films is uniformized by satisfying the following conditions. The average particle volume V B , V G and V R of the blue, green and red colorants, respectively, are set to satisfy V B <V G <V R . The surface roughness of or the colorant content in the colored resin films is set to successively increase in the order of the blue resin film, the green resin film and the red resin film.
Inventors
- 👤 Nobuyuki Sekimura
- 👤 Hideaki Takao
- 👤 Masaru Kamio
- 👤 Tatsuo Murata
- 👤 Miki Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
85 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing blue colorant particles dispersed therein, a green resin film containing green colorant particles dispersed therein, and a red resin film containing red colorant particles; wherein the average particle volume of the blue colorant particles V B , the average particle volume of the green colorant particles V G and the average particle volume of the red colorant particles satisfy the relation of: V.sub.B <V.sub.G <V.sub.R.
Claim 2
Dependent Claim
85 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing blue colorant particles dispersed therein, a green resin film containing green colorant particles dispersed therein, and a red resin film containing red colorant particles; wherein the average particle volume of the blue colorant particles V B , the average particle volume of the green colorant particles V G and the average particle volume of the red colorant particles satisfy the relation of: V.sub.B <V.sub.G <V.sub.R.
Claim 3
Dependent Claim
27 words
A color filter according to claim 1, wherein the colored resin films have been formed from a photosensitive resin having a photosensitive group in its molecular structure.
Claim 4
Dependent Claim
24 words
A color filter according to claim 1, wherein V B , V G and V R satisfy the relation of: V.sub.B :V.sub.G :V.sub.R =0.4-0.6:0.6-0.8:1.
Claim 5
Dependent Claim
32 words
A color filter according to claim 1, wherein V B , V G and V R are respectively in the range of 1.0×10 -6 μm 3 to 1.0×10 -2 μm 3 .
Claim 6
Dependent Claim
32 words
A color filter according to claim 1, wherein V B , V G and V R are respectively in the range of 1.0×10 -5 μm 3 to 1.0×10 -3 μm 3 .
Claim 7
Dependent Claim
27 words
A color filter according to claim 1, wherein the colored resin films contain a respective pigment in a proportion of 10 wt. % to 70 wt. %.
Claim 8
Dependent Claim
27 words
A color filter according to claim 1, wherein the colored resin films contain a respective pigment in a proportion of 30 wt. % to 50 wt. %.
Claim 9
Dependent Claim
13 words
A color filter according to claim 1, wherein the colorants are organic pigments.
Claim 10
Dependent Claim
19 words
A color filter according to claim 1, wherein the colored resin films were prepared from a photosensitive polyamino resin.
Claim 11
Dependent Claim
18 words
A color filter according to claim 1, which further comprises a protective layer on the colored resin films.
Claim 12
Dependent Claim
17 words
A color filter according to claim 10, which further comprises a transparent electrode on the protective layer.
Claim 13
Dependent Claim
18 words
A color filter according to claim 1, which further comprises a transparent electrode on the colored resin films.
Claim 14
Dependent Claim
21 words
A color filter according to claim 1, which further comprises a transparent electrode between the colored resin films and the substrate.
Claim 15
Dependent Claim
27 words
A color filter according to claim 1, which further comprises an alignment control layer to be in contact with a liquid crystal on the colored resin films.
Claim 16
Dependent Claim
16 words
A color filter according to claim 14, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 17
Dependent Claim
18 words
A color filter according to claim 15, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 18
Dependent Claim
17 words
A color filter according to claim 14, wherein said liquid crystal is a twisted nematic liquid crystal.
Claim 19
Dependent Claim
74 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing a blue colorant dispersed therein, a green resin film containing a green colorant dispersed therein and a red resin film containing a red colorant dispersed therein; wherein the surface roughness of the colored resin films successively increases in the order of the blue resin film, the green resin film, and the red resin film.
Claim 20
Dependent Claim
74 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing a blue colorant dispersed therein, a green resin film containing a green colorant dispersed therein and a red resin film containing a red colorant dispersed therein; wherein the surface roughness of the colored resin films successively increases in the order of the blue resin film, the green resin film, and the red resin film.
Claim 21
Dependent Claim
13 words
A color filter according to claim 18, wherein the colorants are organic pigments.
Claim 22
Dependent Claim
19 words
A color filter according to claim 18, wherein the colored resin films were prepared from a photosensitive polyamino resin.
Claim 23
Dependent Claim
18 words
A color filter according to claim 18, which further comprises a protective layer on the colored resin films.
Claim 24
Dependent Claim
17 words
A color filter according to claim 21, which further comprises a transparent electrode on the protective layer.
Claim 25
Dependent Claim
18 words
A color filter according to claim 18, which further comprises a transparent electrode on the colored resin films.
Claim 26
Dependent Claim
21 words
A color filter according to claim 18, which further comprises a transparent electrode between the colored resin films and the substrate.
Claim 27
Dependent Claim
27 words
A color filter according to claim 18, which further comprises an alignment control layer to be in contact with a liquid crystal on the colored resin films.
Claim 28
Dependent Claim
16 words
A color filter according to claim 25, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 29
Dependent Claim
18 words
A color filter according to claim 26, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 30
Dependent Claim
17 words
A color filter according to claim 25, wherein said liquid crystal is a twisted nematic liquid crystal.
Claim 31
Dependent Claim
94 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing a blue colorant dispersed therein, a green resin film containing a green colorant dispersed therein and a red resin film containing a red colorant dispersed therein; wherein the colored resin films have a ratio P/V of the weight of the colorant (P) to the weight of the resin (W) in the resin films, which ratio P/V increases in the order of the blue resin film, the green resin film and the red resin film.
Claim 32
Dependent Claim
94 words
A color filter comprising a substrate and colored resin films, disposed on a support, including a blue resin film containing a blue colorant dispersed therein, a green resin film containing a green colorant dispersed therein and a red resin film containing a red colorant dispersed therein; wherein the colored resin films have a ratio P/V of the weight of the colorant (P) to the weight of the resin (W) in the resin films, which ratio P/V increases in the order of the blue resin film, the green resin film and the red resin film.
Claim 33
Dependent Claim
23 words
A color filter according to claim 29, wherein the colored resin films contain a respective pigment in a proportion of 10-70 wt. %.
Claim 34
Dependent Claim
22 words
A color filter according to claim 29, wherein the colored resin films contain a respective pigment in a proportion 30-50 wt. %.
Claim 35
Dependent Claim
13 words
A color filter according to claim 29, wherein the colorants are organic pigments.
Claim 36
Dependent Claim
19 words
A color filter according to claim 29, wherein the colored resin films were prepared from a photosensitive polyamino resin.
Claim 37
Dependent Claim
18 words
A color filter according to claim 29, which further comprises a protective layer on the colored resin films.
Claim 38
Dependent Claim
17 words
A color filter according to claim 34, which further comprises a transparent electrode on the protective layer.
Claim 39
Dependent Claim
18 words
A color filter according to claim 29, which further comprises a transparent electrode on the colored resin films.
Claim 40
Dependent Claim
21 words
A color filter according to claim 29, which further comprises a transparent electrode between the colored resin films and the substrate.
Claim 41
Dependent Claim
27 words
A color filter according to claim 29, which further comprises an alignment control layer to be in contact with a liquid crystal on the colored resin films.
Claim 42
Dependent Claim
16 words
A color filter according to claim 38, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 43
Dependent Claim
18 words
A color filter according to claim 39, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 44
Dependent Claim
17 words
A color filter according to claim 38, wherein said liquid crystal is a twisted nematic liquid crystal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |