US6876414B2
Expired / Lapsed
US
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Semi-transmissible reflector, semi-transmission type polarizer and liquid-crystal display device using the sames
Assignee: Nitto Denko Corp
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Filing: 2002-02-07
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Granted: 2005-04-05
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Expires: 2022-02-07
Abstract
Abstract A semi-transmissible reflection layer is formed on a light-transmissible polymer substrate uniaxially drawn to have uniaxial orientation characteristic to thereby form a semi-transmissible reflector.
Inventors
- 👤 Kazutaka Hara
- 👤 Takafumi Sakuramoto
- 👤 Minoru Miyatake
- 👤 Tatsuya Osuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/133555; G02F1/133528; G02F1/133545; G02F1/1336; G02F1/13362
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A semi-transmission type polarizer comprising: a semi-transmissible reflector comprising a light-transmissible polymer substrate uniaxially drawn to have uniaxial orientation characteristic, and a semi-transmissible reflection layer formed directly on said light-transmissible polymer substrate, and a polarzer stuck onto said semi-transmissible reflector, wherein the anale between a retardation axis of said light-transmissible polymer substrate in said semi-transmissible reflector and an absorption axis of said polarizer is not larger than 9 degrees.
Claim 2
Dependent Claim
69 words
A semi-transmission type polarizer comprising: a semi-transmissible reflector comprising a light-transmissible polymer substrate uniaxially drawn to have uniaxial orientation characteristic, and a semi-transmissible reflection layer formed directly on said light-transmissible polymer substrate, and a polarzer stuck onto said semi-transmissible reflector, wherein the anale between a retardation axis of said light-transmissible polymer substrate in said semi-transmissible reflector and an absorption axis of said polarizer is not larger than 9 degrees.
Claim 3
Dependent Claim
28 words
A semi-transmission type polarizer according to claim 1 , wherein said semi-transmissible reflection layer is made of a metal vapor-deposited film or metal thin film having light transmissibility.
Claim 4
Dependent Claim
44 words
A liquid-crystal display device comprising a liquid-crystal cell, at least one semi-transmission type polarizer defined in claim 1 and disposed on at least one of opposite surfaces of said liquid-crystal cell, and a backlight having polarizing characteristic and combined with said semi-transmission type polarizer.
Claim 5
Dependent Claim
17 words
A liquid-crystal display device according to claim 3 , wherein the backlight comprises a reflection polarizing element.
Claim 6
Dependent Claim
48 words
A semi-transmissible reflector type polarizer according to claim 1 , wherein, when polarized light is incident on at least one surface of said semi-transmissible reflector type polarizer, the light transmitted through said semi-transmissible reflector type polarizer is reduced by at most 10%, as compared to incident polarized light.
Claim 7
Dependent Claim
26 words
A semi-transmissible reflector type polarizer according to claim 5 , wherein the light transmitted through said semi-transmissible reflector type polarizer is reduced by at most 5%.
Claim 8
Dependent Claim
27 words
A semi-transmissible reflector type polarizer according to claim 1 , wherein the light transmitted through said semi-transmissible reflector type polarizer is not reduced by more than 1%.
Claim 9
Dependent Claim
39 words
A semi-transmissible reflector type polarizer according to claim 1 , wherein the angle between a retardation axis of said light-transmissible polymer substrate in said semi-transmissible reflector and an absorption axis of said polarizer is not larger than 6.4 degrees.
Claim 10
Dependent Claim
39 words
A semi-transmissible reflector type polarizer according to claim 1 , wherein the angle between a retardation axis of said light-transmissible polymer substrate in said semi-transmissible reflector and an absorption axis of said polarizer is not larger than 2.8 degrees.
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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) | 2008-04-04 | 2008-10-04 | 2009-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-04-04 | 2012-10-04 | 2013-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-04-04 | 2016-10-04 | 2017-04-05 | $7700.00 | Window Closed / Lapsed |