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:
Apr. 09, 2013
Filed:
Apr. 01, 2010
Yen-sheng Lin, Taipei, TW;
Chien-chung Tsai, Taipei, TW;
Tzu-chieh Cheng, Taipei, TW;
Kuang-yu Hsu, Taipei, TW;
Dong-yo Jheng, Taipei, TW;
Sheng-lung Huang, Taipei, TW;
Yen-Sheng Lin, Taipei, TW;
Chien-Chung Tsai, Taipei, TW;
Tzu-Chieh Cheng, Taipei, TW;
Kuang-Yu Hsu, Taipei, TW;
Dong-Yo Jheng, Taipei, TW;
Sheng-Lung Huang, Taipei, TW;
National Taiwan University, Taipei, TW;
Abstract
The present invention relates to a white light source, and particularly to a white light source with crystal fiber and a method for color temperature tuning thereof. The white light source of the present invention comprises a pumping source for providing a first-color light, and a gradient index lens for coupling the first-color light into a crystal fiber. The crystal fiber absorbs a portion of the first-color light and generates a second-color light and a third-color light, and a white light with high color rendering index can be obtained. The crystal fiber is made of a first rare earth element oxide and a second rare earth element oxide co-doped yttrium aluminum garnet. The color temperature of the white light can be tuned by adjusting the position of the focus of the pumping light on the end section of the crystal fiber.