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:
May. 18, 2021
Filed:
Oct. 19, 2020
Sharp Kabushiki Kaisha, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A backlight device includes an LED substrate including LED devices arrayed and a quantum dot layer disposed to receive light output from the LED devices. Each LED device emits first blue light and at least one of first green light and first red light, and when relative radiance of the first blue light is 1.00, relative radiance of the first green light is 0.21 or less and relative radiance of the first red light is 0.48 or less. The quantum dot layer includes, in accordance with the at least one of the first green light and the first red light, at least one of a green quantum dot excited by the first blue light and emitting second green light and a red green quantum dot excited by the first blue light and emitting second red light, and the quantum dot layer contains 300 ppm or less of cadmium.