Photo-patterned light polarizing films

US7381507B2 · kind B2 · utility

Assignee

• The Hong Kong University of Science and Technology

Inventors

• Hoi Sing Kwok · Kowloon, CN
• Wing-Chiu Yip · Kowloon, CN
• Vladimir Grigorievich Chigrinov · Kowloon, CN
• Vladimir Kozenkov · Kowloon, CN

Key dates

• Filing date: Jul 10, 2003
• Grant date: Jun 3, 2008
• Expiry date: Jul 10, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133538
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This invention relates to methods for preparing photo-patterned mono- or polychromatic, polarizing films. The polarizer can be pixelated into a number of small regions wherein some of the regions have one orientation of the principal neutral or color absorbing axis; and some other of the said regions have another orientation of the principal neutral or color absorbing axis. The axis orientation is determined by the polarization vector of actinic radiation and the multi-axes orientation is possible by a separated masked exposure. This polarizer can be placed on the interior substrate surface of the LCD cell.