US Patent No. 10,342,083

CURRENT DRIVING CONTROL FOR HIGH BRIGHTNESS LED MATRIX


Patent No. 10,342,083
Issue Date July 02, 2019
Title Current Driving Control For High Brightness Led Matrix
Inventorship Zheng Luo, San Jose, CA (US)
Junjian Zhao, San Jose, CA (US)
Tong Chen, San Jose, CA (US)
Yu-Huei Lee, New Taipei (TW)
Assignee Monolithic Power Systems, Inc., San Jose, CA (US)

Claim of US Patent No. 10,342,083

1. A LED driving system for a LED matrix having a plurality of LEDs connected in parallel, comprising:a plurality of driving modules, wherein each one of the plurality of driving modules is configured to drive a corresponding one of the plurality of LEDs; and wherein
each one of the plurality of driving modules comprises:
a local current driver having a driver input terminal configured to receive a reference current and a driver output terminal configured to provide a driving current to the corresponding one LED; and
a local current tuning module having a U-bit input terminal configured to receive a U-bit current tuning command comprising U bits, wherein U is a positive integer, and wherein the local current tuning module is configured to tune the driving current for the corresponding one LED to reach a desired driving current using the U-bit current tuning command providing a predetermined number of tuning steps, and wherein the predetermined number ranges from 0 to 2U.