USRE28634E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear projection screen
Assignee: —
•
Filing: 1974-03-25
•
Granted: 1975-12-02
•
Expires: 1994-03-25
Abstract
Abstract A transmission type screen embodies a glass or plastic support having a color quality and ambient light control layer applied to the viewing side of the support. The layer comprises a dispersion of gelatin, fine particles of chlorinated diphenyl resin and a number of water-soluble dyes such as Toluidine Blue, Brilliant Acid, Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange. Such a screen structure provides an appropriate color temperature or color quality control and effectively eliminates the ambient light incident on the screen, thereby enhancing image contrast.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:11
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31623
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
48 words
A SCREEN MATERIAL FOR TRANSMISSION TYPE PROJECTION SECREEN HAVING COLOR QUALITY AND AMBIENT LIGHT CONTROL COMPRISING A DISPERSION OF A GENERALLY CLEAR CARRIER MEDIUM, FINE PARTICLES OF CHLORINATED DIPHENYL RESIN AND A PLURALITY OF LIGHT ABSORBING DYES OF ( DIFFERENT ) BLUE, LIGHT RED, YELLOW AND ORANGE COLOR.
Claim 2
Dependent Claim
48 words
A SCREEN MATERIAL FOR TRANSMISSION TYPE PROJECTION SECREEN HAVING COLOR QUALITY AND AMBIENT LIGHT CONTROL COMPRISING A DISPERSION OF A GENERALLY CLEAR CARRIER MEDIUM, FINE PARTICLES OF CHLORINATED DIPHENYL RESIN AND A PLURALITY OF LIGHT ABSORBING DYES OF ( DIFFERENT ) BLUE, LIGHT RED, YELLOW AND ORANGE COLOR.
Claim 3
Dependent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is gelatin.
Claim 4
Dependent Claim
18 words
A screen material in accordance with claim 1 wherein said carrier medium is a generally transparent plastic material.
Claim 5
Dependent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is methacrylate.
Claim 6
Dependent Claim
14 words
A screen material in accordance with claim 1 wherein said carrier medium is polystyrene.
Claim 7
Dependent Claim
61 words
A rear projection screen comprising a generally transparent support and a color quality and ambient light control layer applied to at least the viewing side of said support, said layer comprising a dispersion of a generally clear carrier medium, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes of (different) blue, light red, yellow and orange color.
Claim 8
Dependent Claim
61 words
A rear projection screen comprising a generally transparent support and a color quality and ambient light control layer applied to at least the viewing side of said support, said layer comprising a dispersion of a generally clear carrier medium, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes of (different) blue, light red, yellow and orange color.
Claim 9
Dependent Claim
14 words
A rear projection screen in accordance with claim 7 wherein said support is glass.
Claim 10
Dependent Claim
18 words
A rear projection screen in accordance with claim 7 wherein said support is a generally transparent plastic material.
Claim 11
Dependent Claim
15 words
A rear projection screen in accordance with claim 7 wherein said carrier medium is gelatin.
Claim 12
Dependent Claim
67 words
A rear projection screen comprising a generally transparent plastic support and a color quality and ambient light control layer applied to at least the viewing side of said support, said layer comprising a dispersion of gelatin, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes which are Toluidine Blue, Brilliant Acid Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange In color.
Claim 13
Dependent Claim
67 words
A rear projection screen comprising a generally transparent plastic support and a color quality and ambient light control layer applied to at least the viewing side of said support, said layer comprising a dispersion of gelatin, fine particles of chlorinated diphenyl resin and a plurality of light absorbing dyes which are Toluidine Blue, Brilliant Acid Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange In color.
Claim 14
Dependent Claim
61 words
A rear projection screen having an image light redirecting layer having minute light scattering elements dispersed in a transparent material, and a non-light scattering, ambient light control layer in contact with the viewer side of the redirecting layer and having a plurality of light absorbing dyes of blue, light red, yellow and orange colors incorporated in a generally transparent carrier medium.
Claim 15
Dependent Claim
61 words
A rear projection screen having an image light redirecting layer having minute light scattering elements dispersed in a transparent material, and a non-light scattering, ambient light control layer in contact with the viewer side of the redirecting layer and having a plurality of light absorbing dyes of blue, light red, yellow and orange colors incorporated in a generally transparent carrier medium.
Claim 16
Dependent Claim
23 words
A rear projection screen according to claim 13 wherein the image light redirecting layer comprises chlorinated diphenyl resin dispersed in a transparent material.
Claim 17
Dependent Claim
29 words
A rear projection screen according to claim 13 wherein the colors of said dyes are Toluidine Blue, Brilliant Acid Cyanine Blue, Fast Light Red, Superchrome Yellow and Ethyl Orange.
Claim 18
Dependent Claim
75 words
A rear projection screen comprising a first generally transparent layer having chlorinated diphenyl resin dispersed therein for redirecting image light; and a second generally transparent layer in contact with the viewer side of the first layer and having a plurality of light absorbing dyes of different color incorporated therein, the color of said dyes being chosen from the color group of blue, light red, yellow and orange to alter the color temperature of image light.
Claim 19
Dependent Claim
75 words
A rear projection screen comprising a first generally transparent layer having chlorinated diphenyl resin dispersed therein for redirecting image light; and a second generally transparent layer in contact with the viewer side of the first layer and having a plurality of light absorbing dyes of different color incorporated therein, the color of said dyes being chosen from the color group of blue, light red, yellow and orange to alter the color temperature of image light.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |