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:
Nov. 01, 2016
Filed:
Aug. 29, 2014
Unity Opto Technology Co., Ltd., New Taipei, TW;
Chih-Chao Chang, New Taipei, TW;
Hung-Li Yeh, New Taipei, TW;
Po-Hsiang Chung, New Taipei, TW;
Chun-Che Lin, New Taipei, TW;
Ru-Shi Liu, New Taipei, TW;
Unity Opto Technology Co., Ltd., New Taipei, TW;
Abstract
An LED structure is applied to a backlight source to set a white light of a backlight module at a standard D65 position of the CIE1931 chromaticity coordinates and used together with a display module. A red phosphor for emitting a red light, a yellow phosphor for emitting a yellow light, and a blue light LED chip are provided. The mixing ratio of the red phosphor to the yellow phosphor is controlled within a range of (2.33−1):1, so that the original LED white light falls within a region enclosed by ccy≦1.8*ccx−0.12, ccy≧1.8*ccx−0.336, ccy≦0.33 and ccy≧0.15 of the CIE1931 coordinates. Since the red phosphor does not absorb or convert yellow light, the brightness loss of the yellow light that excites the yellow phosphor is minimized. A color filter may be installed to achieve better NTSC effect and luminous efficacy.