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:
Jul. 22, 2025
Filed:
Apr. 13, 2022
Point Tek Co., Ltd., Yongin-si, KR;
Jun Sik Kim, Yongin-si, KR;
POINT TEK CO., LTD., Yongin-si, KR;
Abstract
AC (alternating current) direct driving circuit device for uniformity of multi-channel light emitting diodes includes: a power supply unit that applies AC voltage; a light emitting unit including a plurality of light emitting diodes which are connected in series and emit light by current according to the voltage applied by the power supply unit; a switch unit including a plurality of switch modules which are formed on a plurality of conductive lines connecting input nodes of two different light emitting diodes among the plurality of light emitting diodes and distribute an amount of the current flowing in each of the light emitting diodes by turning on or off according to an increase or decrease in the amount of the current; a distribution resistance unit including a plurality of distribution resistors for distributing the amount of the current; and a driving unit that controls the amount of the current flowing in each of the plurality of light emitting diodes by selectively connecting the current flowing in each of the plurality of light emitting diodes to at least one of the plurality of distribution resistors.