US Patent No. 10,117,304

LED FAILURE DETECTING DEVICE


Patent No. 10,117,304
Issue Date October 30, 2018
Title Led Failure Detecting Device
Inventorship Ping-Kai Huang, Hsinchu (TW)
Chung-Ta Tsai, Hsinchu (TW)
Assignee Macroblock, Inc., Hsinchu (US)

Claim of US Patent No. 10,117,304

1. A light emitting diode (LED) failure detecting device operatively associated with an LED array, the LED array including a plurality of scan lines, a plurality of data lines, and a plurality of LED units that are arranged in a matrix with a plurality of rows and a plurality of columns, each of the LED units having a first terminal and a second terminal, and permitting current flow therethrough from the first terminal thereof to the second terminal thereof; for each of the rows of the LED units, the first terminals of the LED units being coupled to a respective one of the scan lines; for each of the columns of the LED units, the second terminals of the LED units being coupled to a respective one of the data lines; said LED failure detecting device comprising:a driving circuit used to he coupled to the scan lines and the data lines, receiving a first control input that corresponds to selection of one of the LED units, and driving the LED units based on the first control input in such a way that a current flows through said one of the LED units; and
a determining circuit used to be coupled to the data lines for receiving a plurality of first voltages respectively thereat, and further receiving a second control input that at least corresponds to selection of one of the data lines which is coupled to said one of the LED units, said determining circuit generating, based at least on the first voltages and the second control input, a determination output that indicates whether said one of the LED units is determined to have failed.