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. 30, 2021
Filed:
Jan. 19, 2021
Lumens Co., Ltd., Yongin-si, KR;
LUMENS CO., LTD., Yongin-si, KR;
Abstract
An LED display lighting device is disclosed. The LED display lighting device includes: a substrate including a substrate base and a first electrode part and a second electrode part, both of which are disposed on the substrate base; a plurality of LED chips arranged in a matrix on the substrate; and a diffusion plate covering the upper portions of the LED chips. Each of the LED chips includes: a light-transmitting base; n LED cells disposed under the light-transmitting base and each including a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer; an interconnection through which the n LED cells are connected in series; a first electrode structure through which the first conductive semiconductor layer of the first LED cell is connected to the first electrode part; and a second electrode structure through which the second conductive semiconductor layer of the n-th LED cell is connected to the second electrode part. The sum of the areas of the active layers of the n LED cells is at least 50% of the area of the light-transmitting base.