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Photo-Induced Dichroic Polarizers and Fabrication Methods Thereof

總結: The invention relates to field of devices and preparations of highly ordered organic molecular layers both on flexible and rigid substrates. In particular, the invention discloses the photo-chemically stable dichroic dye molecules and the device structures, which are suitable for the fabrication of superthin light polarizers for LCDs. Fabrication methods of multi-layers, -axes and -color polarizers, based on photo-aligning technology have also been disclosed.

技術優勢: The photo-aligned internal polarizers are cost-effective and enable new LCDs with excellent electro-optical response, including good viewing angles and high brightness. The internal polarizers, based on photo-chemically stable azodye films can be 2 to 3 times cheaper and possess very attractive optical characteristics in comparison with common polarizers, based on plastic PVA-iodine sheets.
Also, existing polarizers for LCDs suffer from expensive and complicated implementation. They are very thick (150-400µ) and possess disadvantages such as light losses at additional reflections and parallax effect, and poor brightness, contrast and viewing angles. The newly developed photo-alignment methods allow fabricating of thin internal polarizers based on photo-chemically stable azodye films and resolved these problems.

技術應用: - Internal polarizers for liquid crystal displays (LCDs) with fine resolution and large information content, e.g. AM-LCDs and LCOS-LCDs

附加資料: Patent Number: US7070913B2
Application Number: US2001853648A
Inventor: Kozenkov, Vladimir Markovich | Yip, Wing Chiu | Chigrinov, Vladimir Grigorievich | Prudnikova, Elena Karlovna | Kwok, Hoi Sing
Priority Date: 14 May 2001
Priority Number: US7070913B2
Application Date: 14 May 2001
Publication Date: 4 Jul 2006
IPC Current: G02B000530
US Class: 430321 | 35948702 | 35948705 | 35948706 | 359491
Assignee Applicant: The Hong Kong University of Science & Technology
Title: Photo-induced dichroic polarizers and fabrication methods thereof
Usefulness: Photo-induced dichroic polarizers and fabrication methods thereof
Summary: For thin light polarizers used in liquid crystal devices.
Novelty: Formation of polarizing material used for liquid crystal devices, comprises forming layer of dichroic material on substrate, and exposing layer to activating light illumination

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