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:
Aug. 29, 2023
Filed:
Oct. 09, 2019
Applicants:
Tsun-i Wang, Taoyuan, TW;
Ching-chun Wu, Taoyuan, TW;
Chia-liang Yang, Taoyuan, TW;
Inventors:
Assignee:
Dynascan Technology Corp., Taoyuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2020.01); H05B 45/14 (2020.01); H05B 45/58 (2020.01); H05B 45/22 (2020.01); H05B 45/20 (2020.01); H05B 45/10 (2020.01);
U.S. Cl.
CPC ...
G01R 31/2635 (2013.01); H05B 45/14 (2020.01); H05B 45/58 (2020.01);
Abstract
To test a first LED, a second LED, and a third LED in a light-emitting unit, a method is disclosed herein comprising the following steps: setting the first and second LEDs in respective driven states to generate associated light; providing the third LED to receive the light associated with the first and second LEDs, thereby generating a first photocurrent and a second photocurrent; providing the first LED to receive the light associated with the second LED, thereby generating a third photocurrent; and calculating a decay factor of each of the LEDs based on the first, second, and third photocurrents.