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:
Feb. 10, 2004
Filed:
Jul. 18, 2001
Chih-Kung Lee, Taipei, TW;
Jiun-Yan Wu, Taipei, TW;
Shu-Sheng Lee, Taipei, TW;
Ching-Heng Tang, Taipei, TW;
Slight Opto-Electronics Co., Ltd., Taipei, TW;
Abstract
A polarization splitting backlight module for efficiently converting a non-polarized light beam emitted from the light source into a single polarization state is disclosed. The polarization splitting backlight module of the present invention comprises an under plate with a ridged lower surface, a light source, a special reflection film, a scattering structure, a substrate and a polarization splitting film. The light beam emitted from the light source is introduced into the scattering structure between the under plate and the substrate. After a series of processes, such as scattering, reflection, phase retardation and polarization beam-splitting, the light beam will pass through the polarization splitting film being of a single polarization state such that it could be utilized by electro-optical systems, such as liquid crystal displays. The present invention converts light beams into a single polarization state, and the efficiency thus is higher than that of a conventional backlight module. The present invention achieves brightness levels that are almost twice that of conventional backlight module.