Patent US5444570A successfully refreshed from Google Patents.
US5444570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarizing screen
Assignee: Kuraray Co Ltd
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Filing: 1994-09-23
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Granted: 1995-08-22
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Expires: 2014-09-23
Abstract
Abstract A polarizing screen 20 for presenting images in response to receipt of imagewise rays of light 22 projected from, for example, a video projector. The polarizing screen 20 is made of a woven polarizing fabric 1 which has front and rear surfaces D and E opposite to each other and which is woven in a satin fashion including warps of one of polarizing and non-polarizing threads 12 and 11 and wefts of the other of the polarizing and non-polarizing threads 12 and 11. The front surface D of the woven polarizing fabric 1 has a relatively large portion of the polarizing threads 12 being exposed therefrom and the rear surface E thereof has a relatively large portion of the non-polarizing threads 11 exposed therefrom. The polarizing threads 12 of the woven polarizing fabric 1 have their lengthwise direction oriented substantially perpendicular to a horizontal plane and, therefore, the horizontal viewing angle is increased. Also, the front surface D of the woven polarizing fabric 1 where the relatively large portion of the polarizing threads 12 are exposed is oriented so as to confront the viewers 23 so that the woven polarizing fabric 1 can exhibit an enhanced function of a polarizing filter.
Inventors
- 👤 Masao Uetsuki
- 👤 Takashi Tsunematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:36
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/604
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A polarizing screen which comprises: a woven polarizing fabric having front and rear surfaces opposite to each other, said woven polarizing fabric being woven in a satin fashion including warps of one of polarizing and non-polarizing threads and wefts of the other of the polarizing and non-polarizing threads, said front surface of the woven polarizing fabric having a relatively large portion of the polarizing threads being exposed therefrom and said rear surface thereof having a relatively large portion of the non-polarizing threads exposed therefrom; said polarizing threads of the woven polarizing fabric have their lengthwise direction oriented substantially perpendicular to a horizontal plane.
Claim 2
Dependent Claim
103 words
A polarizing screen which comprises: a woven polarizing fabric having front and rear surfaces opposite to each other, said woven polarizing fabric being woven in a satin fashion including warps of one of polarizing and non-polarizing threads and wefts of the other of the polarizing and non-polarizing threads, said front surface of the woven polarizing fabric having a relatively large portion of the polarizing threads being exposed therefrom and said rear surface thereof having a relatively large portion of the non-polarizing threads exposed therefrom; said polarizing threads of the woven polarizing fabric have their lengthwise direction oriented substantially perpendicular to a horizontal plane.
Claim 3
Dependent Claim
44 words
The polarizing screen as claimed in claim 1, which is used as a transmissive-type polarizing screen and wherein the rear surface of the woven polarizing fabric opposite to the front surface adapted to confront a viewer is adapted to receive imagewise rays of light.
Claim 4
Dependent Claim
50 words
The polarizing screen as claimed in claim 1, which is used as a reflective-type polarizing screen and wherein the front surface of the woven polarizing fabric adapted to confront a viewer is adapted to receive imagewise rays of light and the rear surface is deposited with a metallic reflecting layer.
Claim 5
Dependent Claim
26 words
The polarizing screen as claimed 1, further comprising a transparent resin layer formed on each of the front and rear surfaces of the woven polarizing fabric.
Claim 6
Dependent Claim
114 words
A polarizing screen which comprises: a woven polarizing fabric having front and rear surfaces opposite to each other, said woven polarizing fabric including a plurality of juxtaposed polarizing threads and a plurality of juxtaposed non-polarizing threads extending substantially perpendicular to the juxtaposed polarizing threads, each of said polarizing threads having a cross-sectional shape as viewed in a direction perpendicular to a lengthwise direction of each polarizing thread, said cross-sectional shape comprising a generally flattened front portion thereof defining the front surface of the woven polarizing fabric anti a generally oval rear portion opposite to said flattened front portion; and a metallic light reflecting layer formed on the rear surface of the woven polarizing fabric.
Claim 7
Dependent Claim
114 words
A polarizing screen which comprises: a woven polarizing fabric having front and rear surfaces opposite to each other, said woven polarizing fabric including a plurality of juxtaposed polarizing threads and a plurality of juxtaposed non-polarizing threads extending substantially perpendicular to the juxtaposed polarizing threads, each of said polarizing threads having a cross-sectional shape as viewed in a direction perpendicular to a lengthwise direction of each polarizing thread, said cross-sectional shape comprising a generally flattened front portion thereof defining the front surface of the woven polarizing fabric anti a generally oval rear portion opposite to said flattened front portion; and a metallic light reflecting layer formed on the rear surface of the woven polarizing fabric.
Claim 8
Dependent Claim
28 words
The polarizing screen as claimed in claim 5, wherein said polarizing threads of the woven polarizing fabric have their lengthwise direction oriented substantially perpendicular to a horizontal plane.
Claim 9
Dependent Claim
76 words
The polarizing screen as claimed in claim 5, wherein said woven polarizing fabric is woven in a satin fashion including warps of one of the polarizing and non-polarizing threads and wefts of the other of the polarizing and non-polarizing threads, said front surface of the woven polarizing fabric having a relatively large portion of the polarizing threads being exposed therefrom and said rear surface thereof having a relatively large portion of the non-polarizing threads exposed therefrom.
Claim 10
Dependent Claim
28 words
The polarizing screen as claimed in claim 5, further comprising a transparent resin layer formed on each of the front and rear surfaces of the woven polarizing fabric.
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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) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |