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:
Dec. 15, 2020
Lumileds Llc, San Jose, CA (US);
Antonio Lopez Julia, Vaals, NL;
Zhi Hua Song, Palo Alto, CA (US);
Lumileds LLC, San Jose, CA (US);
Abstract
A micro light emitting diode (LED) die can include a matrix of micro LEDs with a variety of forward voltages. A method of reducing a number of undriven or under driven uLEDs can include providing, by a power supply, an alternating current voltage (V) with a minimum voltage (V) and a maximum voltage (V), Vbeing sufficient to drive a plurality of micro light emitting diodes (uLEDs) of a uLED die using a plurality of uLED drivers, identifying, by a controller coupled to the uLED drivers, a uLED of the plurality of uLEDs with a forward voltage (V) greater than V, and altering, by the controller, a time of a rising edge of a pulse width modulation (PWM)-on time of the uLED such that Vof the uLED is less than Vfor the PWM-on time.