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. 21, 2012
Filed:
Aug. 18, 2009
I-ting Huang, Kaohsiung, TW;
Ching-lung Chang, Taoyuan, TW;
I-Ting Huang, Kaohsiung, TW;
Ching-Lung Chang, Taoyuan, TW;
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Abstract
A light source device including light-emitting diodes (LEDs) and a carrier is provided. Chromaticities of some LEDs fall in a first area of a chromaticity coordinate diagram, while chromaticities of the other LEDs fall in a second area of the chromaticity coordinate diagram. The second area and the first area are point symmetric to a white center of the chromaticity coordinate diagram. A chromaticity coordinate value farthest from the white center in the first area is (X, Y), and a chromaticity coordinate value farthest from the white center in the second area is (X, Y), wherein 0.06≧|X−X|≧0.03 and 0.06≧|Y−Y|≧0.03. The LEDs are disposed on the carrier, and a chromaticity difference of any two adjacent LEDs in the chromaticity coordinate diagram is (ΔX, ΔY), wherein |ΔX|≦0.01 and |ΔY|≦0.01.