Optical element, method of manufacturing optical element, and liquid crystal display device
First Claim
Patent Images
1. An optical element comprising:
- a reflection polarizer which is formed of a discotic liquid crystal compound and in which a cholesteric liquid crystalline phase is immobilized,wherein, in the reflection polarizer, a front retardation value Re satisfies 0 nm≤
Re≤
10 nm in a range of ±
50 nm outside a reflection center wavelength, and an absolute value |Ret (50°
)| of a retardation value Ret in a polar angle 50°
direction satisfies |Ret (50°
)|≤
50 nm,wherein the reflection polarizer includes a first light reflecting layer, a second light reflecting layer, and a third light reflecting layer, andwherein, any one of the first light reflecting layer, the second light reflecting layer, and the third light reflecting layer is a blue reflection layer having a reflection center wavelength of 380 to 499 nm and having a peak of a reflectance of which a half-width is 100 nm or less, another is a green reflection layer having a reflection center wavelength of 500 to 599 nm and having a peak of a reflectance of which a half-width is 200 nm or less, and another is a red reflection layer having a reflection center wavelength of 600 to 750 nm and having a peak of a reflectance of which a half-width is 150 nm or less.
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Abstract
The present invention includes an optical element of which an oblique tint change can be improved in a case of the optical element is incorporated to a liquid crystal display device, a method of manufacturing an optical element, and a liquid crystal display device. The optical element includes: a reflection polarizer which is formed of a discotic liquid crystal compound and in which a cholesteric liquid crystalline phase is immobilized, in which, in the reflection polarizer, a front retardation value Re satisfies 0 nm≤Re<10 nm in a range of ±50 nm outside a reflection center wavelength, and an absolute value |Ret (50°)| of a retardation value Ret in a polar angle 50° direction satisfies |Ret (50°)|≤50 nm.
7 Citations
3 Claims
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1. An optical element comprising:
-
a reflection polarizer which is formed of a discotic liquid crystal compound and in which a cholesteric liquid crystalline phase is immobilized, wherein, in the reflection polarizer, a front retardation value Re satisfies 0 nm≤
Re≤
10 nm in a range of ±
50 nm outside a reflection center wavelength, and an absolute value |Ret (50°
)| of a retardation value Ret in a polar angle 50°
direction satisfies |Ret (50°
)|≤
50 nm,wherein the reflection polarizer includes a first light reflecting layer, a second light reflecting layer, and a third light reflecting layer, and wherein, any one of the first light reflecting layer, the second light reflecting layer, and the third light reflecting layer is a blue reflection layer having a reflection center wavelength of 380 to 499 nm and having a peak of a reflectance of which a half-width is 100 nm or less, another is a green reflection layer having a reflection center wavelength of 500 to 599 nm and having a peak of a reflectance of which a half-width is 200 nm or less, and another is a red reflection layer having a reflection center wavelength of 600 to 750 nm and having a peak of a reflectance of which a half-width is 150 nm or less. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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Original AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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InventorsAtsumi, Kunihiro, Saitoh, Yukito, Ohmuro, Katsufumi, Takeda, Jun, Morishima, Shinichi
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Primary Examiner(s)Crockett, Ryan
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Assistant Examiner(s)Qureshi, Mariam
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Application NumberUS15/894,449Publication NumberTime in Patent Office778 DaysField of SearchUS Class CurrentCPC Class CodesG02B 5/3016 involving passive liquid cr...G02F 1/133536 Reflective polarizers G02F1...G02F 1/13363 Birefringent elements, e.g....G02F 1/133638 Waveplates, i.e. plates wit...G02F 2413/01 Number of plates being 1G02F 2413/05 Single plate on one side of...
