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, 2020
Filed:
Aug. 24, 2018
Maven Optronics Co., Ltd., Hsinchu County, TW;
Chieh Chen, Palo Alto, CA (US);
Maven Optronics Co., LTD., Hsinchu County, TW;
Abstract
A light-emitting device includes a flip-chip LED semiconductor chip to provide a primary light, a photoluminescent (PL) structure disposed on the LED semiconductor chip and a moisture-barrier reflective structure covering a chip-edge surface of the LED semiconductor chip and a photoluminescent-side surface of the PL structure. The sequentially stacked PL structure includes a first PL layer, a transparent isolation layer, a second PL layer and a transparent moisture barrier layer. For example, the LED semiconductor chip emits a blue light, the first PL layer includes a red phosphor material, and the second PL layer includes a green quantum dot (QD) material. Therefore, the red phosphor material of the first PL layer can convert a portion of the higher-energy-level blue light into a lower-energy-level converted red light, so as to reduce an intensity of an unconverted portion of the blue light reaching the green QD material within the second PL layer.