The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2011
Filed:
Jul. 06, 2009
Hui-lung Kuo, Hsinchu, TW;
Ping-chen Chen, Hsinchu, TW;
Yi-ping Hsieh, Hsinchu, TW;
Pao-ju Hsieh, Hsinchu, TW;
Yu-hsun Wu, Hsinchu, TW;
Hui-Lung Kuo, Hsinchu, TW;
Ping-Chen Chen, Hsinchu, TW;
Yi-Ping Hsieh, Hsinchu, TW;
Pao-Ju Hsieh, Hsinchu, TW;
Yu-Hsun Wu, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A high transmittance brightness enhanced optical element for backlight modules and liquid crystal display device is disclosed. The brightness enhanced polarizing optical element comprises a reflective polarizer film, a phase retardation film, and a polarization enhancement film. The reflective polarizer film provides a function of selectively reflecting right-handness circularly polarized light or left-handness circularly polarized light and will transmit the other one of them. The one was selectively reflected will be recombined with the light source or the backlight and re-direct toward the reflective polarizer. The portions of the reflective light will be recombined with the fresh light from the light source as above and the processes repeatedly. As a result, almost all of the light transmit the reflective polarizer and in the same circular polarization. The light is then transmitted the phase retardation film and converted to a polarized light with another optical axis.