US4983016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission projection screen and method of manufacturing the same
Assignee: Panasonic Holdings Corp
•
Filing: 1990-01-29
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Granted: 1991-01-08
•
Expires: 2010-01-29
Abstract
Abstract A screen is made having the same characteristics as of a known lenticular lens by having a number of organic materials provided in scatter arrangement within a substrate of a screen and shaped into bar-like configuration by stretching for the purpose of anisotropic diffusion of light.
Inventors
- 👤 Yoshiharu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:34
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; H; H04; H04N; H04N5/00; H04N5/72; H04N5/74
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
54 words
A transmission projection screen comprising a light transmissible resin material and a plurality of bar-like members of another resin material which is different in index of refraction from and not soluble in said light transmissible resin material, the bar-like members being dispersed in the light transmissible resin material and directing in a same direction.
Claim 2
Dependent Claim
54 words
A transmission projection screen comprising a light transmissible resin material and a plurality of bar-like members of another resin material which is different in index of refraction from and not soluble in said light transmissible resin material, the bar-like members being dispersed in the light transmissible resin material and directing in a same direction.
Claim 3
Dependent Claim
34 words
A transmission projection screen according to claim 1, wherein a difference of refractive index relative to the d line between said light transmissive resin material and said bar-like resin material is at most 0.15.
Claim 4
Dependent Claim
29 words
A transmission projection screen according to claim 1, wherein a lengthwise extent a and a widthwise extent b of each of said bar-like resin members is expressed as: a/b≧3.
Claim 5
Dependent Claim
19 words
A transmission projection screen according to claim 1, wherein said light transmissible resin material comprises a transparent thermoplastic resin.
Claim 6
Dependent Claim
74 words
A method of manufacturing a transmission projection screen of claim 1, comprising the steps of forming into a sheet said light transmissible resin material in which extensible beads of said resin material insoluble in and different in the refractive index from said light transmissible resin material are held in scatter arrangement, and stretching out said sheet of resin in one direction so as to shape each of said resin beads into a bar-like form.
Claim 7
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 5, wherein said light transmissible resin material comprises an acrylic resin.
Claim 8
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 5, wherein said light transmissible resin material comprises a polycarbonate resin.
Claim 9
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 5, wherein said light transmissible resin material comprises a polyester resin.
Claim 10
Dependent Claim
23 words
A method of manufacturing a transmission projection screen according to claim 5, wherein said light transmissible resin material comprises a polyvinyl chloride resin.
Claim 11
Dependent Claim
23 words
A method of manufacturing a transmission projection screen according to claim 5, wherein each of said resin beads comprises a transparent silicone resin.
Claim 12
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 5, wherein each of said resin beads comprises an aryl resin.
Claim 13
Dependent Claim
30 words
A method of manufacturing a transmission projection screen according to claim 6, wherein each of said resin beads comprises a denatured acrylic resin having a high degree of refractive index.
Claim 14
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 6, wherein each of said resin beads comprises a polystyrene resin.
Claim 15
Dependent Claim
22 words
A method of manufacturing a transmission projection screen according to claim 6, wherein each of said resin beads comprises a polycarbonate resin.
Claim 16
Dependent Claim
76 words
A transmitting type projection television comprising: a transmission projection screen comprising a light transmissible resin material in which a plurality of bar-like members of another resin material having a different index of refraction from and not soluble in said light transmissible resin material are dispersed to be same in orientation direction; a cathode ray tube; and a projection lens for projecting of an optical image developed on said cathode ray tube onto said transmission projection screen.
Claim 17
Dependent Claim
76 words
A transmitting type projection television comprising: a transmission projection screen comprising a light transmissible resin material in which a plurality of bar-like members of another resin material having a different index of refraction from and not soluble in said light transmissible resin material are dispersed to be same in orientation direction; a cathode ray tube; and a projection lens for projecting of an optical image developed on said cathode ray tube onto said transmission projection screen.
Claim 18
Dependent Claim
96 words
A transmitting type projection television comprising: a transmission projection screen comprising a light transmissible resin material in which a plurality of bar-like members of another resin material having a different index of refraction from and not soluble in said light transmissible resin material are dispersed to be same in orientation direction; a liquid crystal panel; an optical illumination system for illuminating an image developed on said liquid crystal panel to form an image on the liquid crystal panel; and a projection lens for projecting the image formed on the liquid crystal panel onto said projection screen.
Claim 19
Dependent Claim
96 words
A transmitting type projection television comprising: a transmission projection screen comprising a light transmissible resin material in which a plurality of bar-like members of another resin material having a different index of refraction from and not soluble in said light transmissible resin material are dispersed to be same in orientation direction; a liquid crystal panel; an optical illumination system for illuminating an image developed on said liquid crystal panel to form an image on the liquid crystal panel; and a projection lens for projecting the image formed on the liquid crystal panel onto said projection screen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |