Patent ID: 9686836
Date: 2017-06-20
CPC Classifications: G02F,G08B,G09G,H05B,Y02B

Claim:
1. A light emitting diode (LED) driving device, comprising: a direct current/direct current (DC/DC) controller configured to control an output segment that is used to generate an output voltage from an input voltage and supply the output voltage to an LED; an output current driver configured to generate an output current of the LED; and an LED short-circuit detection circuit configured to monitor a cathode voltage of the LED to perform an LED short-circuit detection; a short-circuit detection signal input terminal arranged to input a short-circuit detection enable signal, the short-circuit detection enable signal is used for controlling whether a LED short-circuit detection action is performed or not, wherein the LED short-circuit detection circuit controls whether or not an action is performed according to a short-circuit detection enable signal input from outside the LED driving device, and wherein the LED driving device supplies the output current to the LED without performing the LED short-circuit detection if the LED short-circuit detection circuit makes the action invalid according to the short-circuit detection enable signal.