Wide-acceptance-angle circular polarizers
First Claim
Patent Images
1. A circular polarizer consisting of:
- one single linear polarizer producing a linear state of polarization; and
two biaxial phase retardation films adjacent to the one single linear polarizer forming the circular polarizer, the circular polarizer not including a liquid crystal material, wherein said at least one biaxial phase retardation film adjacent to the one single linear polarizer comprises;
a slow axis on the plane parallel to a polarizer-retarder surface of said at least one biaxial phase retardation film between one of approximately +0.1°
to approximately +2.1° and
approximately −
0.1°
to approximately −
2.1°
with respect to the transmission direction of the said linear polarizer; and
a phase retardation on the plane parallel to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.47λ
˜
0.49λ
); and
a phase retardation on the plane perpendicular to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.35λ
˜
0.37λ
) where λ
is the wave length of incident light.
1 Assignment
0 Petitions
Accused Products
Abstract
A circular polarizer comprising a single linear polarizer producing a linear state of polarization and at least one phase retardation film layered with the single linear polarizer. In a first embodiment, the at least one phase retardation film includes at least one uniaxial A-plate phase retardation film and at least one uniaxial C-plate phase retardation film. In a second embodiment of the invention, the circular polarizer includes a linear polarizer and at least one biaxial phase retardation film layered with the linear polarizer. In another example of the circular polarize of the second embodiment, at least one uniaxial A-plate phase retardation film and/or at least one uniaxial C-plate phase retardation film is also layer with the linear polarize and the biaxial phase retardation film.
24 Citations
2 Claims
-
1. A circular polarizer consisting of:
- one single linear polarizer producing a linear state of polarization; and
two biaxial phase retardation films adjacent to the one single linear polarizer forming the circular polarizer, the circular polarizer not including a liquid crystal material, wherein said at least one biaxial phase retardation film adjacent to the one single linear polarizer comprises;
a slow axis on the plane parallel to a polarizer-retarder surface of said at least one biaxial phase retardation film between one of approximately +0.1°
to approximately +2.1° and
approximately −
0.1°
to approximately −
2.1°
with respect to the transmission direction of the said linear polarizer; and
a phase retardation on the plane parallel to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.47λ
˜
0.49λ
); and
a phase retardation on the plane perpendicular to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.35λ
˜
0.37λ
) where λ
is the wave length of incident light.
- one single linear polarizer producing a linear state of polarization; and
-
2. A circular polarizer consisting of:
- one single linear polarizer producing a linear state of polarization; and
two biaxial phase retardation films adjacent to the one single linear polarizer forming the circular polarizer, the circular polarizer not including a liquid crystal material, wherein said at least one biaxial phase retardation film away from the one single linear polarizer comprises;
a slow axis on the plane parallel to a polarizer-retarder surface of said at least one biaxial phase retardation film between one of approximately +45.1°
to approximately +47.1° and
approximately −
45.1°
to approximately −
47.1°
with respect to the transmission direction of the said linear polarizer; and
a phase retardation on the plane parallel to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.241λ
˜
0.248λ
); and
a phase retardation on the plane perpendicular to the polarizer-retarder surface of approximately d·
Δ
n=±
(0.126λ
˜
0.139λ
) where λ
, is the wave length of incident light.
- one single linear polarizer producing a linear state of polarization; and
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeUniversity of Central Florida (State University System of Florida)
-
Original AssigneeUniversity of Central Florida Research Foundation Inc. (State University System of Florida)
-
InventorsLu, Ruibo, Zhu, Xinyu, Wu, Thomas X., Wu, Shin-Tson, Hong, Qi
-
Primary Examiner(s)Robinson, Mark
-
Assistant Examiner(s)CHANG, CHARLES S
-
Application NumberUS12/148,491Publication NumberTime in Patent Office1,698 DaysField of Search349 96- 98, 349117-121, 359/489.07, 359/489.13, 359/489.15US Class Current349/117CPC Class CodesG02B 5/3041 comprising multiple thin la...G02F 1/133528 PolarisersG02F 1/133541 Circular polarisersG02F 1/13363 Birefringent elements, e.g....G02F 1/133634 the refractive index Nz per...
