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:
Dec. 29, 2015
Filed:
Dec. 31, 2013
Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen, CN;
Chihtsung Kang, Shenzhen, CN;
Zanjia Su, Shenzhen, CN;
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD., Shenzhen, CN;
Abstract
A white light emitting diode and a backlight module are provided. The light emitting diode comprises a blue chip and an encapsulating layer having yttrium aluminum garnet phosphor powder mixed therein, wherein the dominant wavelength in a frequency spectrum of blue light emitted from the blue chip is between 448 and 462.5 nm, the peak wavelength of yellow light emitted from the yttrium aluminum garnet phosphor powder is between 550 and 575 nm, and the doped concentration of the yttrium aluminum garnet phosphor powder is 0.01% to 0.1% by weight of the encapsulating layer. Due to the red shift of the peak wavelength of the blue light emitted from the blue chip, the brightness of the white LED is enhanced (>10%).