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:
Oct. 23, 2012
Filed:
Apr. 29, 2010
Wei-chih Wang, Hsin-Chu, TW;
Wei-chun Yang, Hsin-Chu, TW;
Chi-ming Tseng, Hsin-Chu, TW;
Young Lighting Technology Inc., Hsin-Chu, TW;
Abstract
An illumination apparatus includes a light guide plate, a first light source module, and a second light source module. The light guide plate has a first incident surface and a second incident surface opposite to the first incident surface. The first and the second light source modules provide light beams into the first and the second incident surfaces, respectively. The first light source module includes at least one first white light emitting diode (LED) and at least one second white LED neighboring with each other. The first and the second white LEDs have different color temperatures. The second light source module includes at least one third white LED and at least one forth white LED neighboring with each other. The third and the forth white LEDs have different color temperatures. The third and the forth white LEDs are located corresponding to the second and the first white LEDs, respectively.