Driving device and driving method thereof

A driving method, adapted to drive at least one light emitting diode string, and comprising:

• respectively generating at least one driving signal to drive the light emitting diode strings, respectively, and generating a plurality of detection voltages on a plurality of detection points of the light emitting diode strings;
• comparing a first detection voltage among the detection voltages with a plurality of all remaining second detection voltages among the detection voltages to generate a detection result of the light emitting diode string corresponding to the first detection voltage;
• and
• determining whether to stop generating the driving signal of the corresponding light emitting diode string according to the detection result corresponding to the first detection voltage,
• wherein a plurality of differences between the first detection voltage on the detection point of the corresponding first light emitting diode string and the second detection voltages on the detection points of the second light emitting diode strings are calculated by a plurality of voltage subtractors, and the detection result is generated by performing an OR logical operation by an operation circuit according to the output signals, and the detection result is used for indicating that the corresponding first light emitting diode string is abnonnal when at least one of the differences is greater than a predetermined threshold.

A driving device, comprising:

• at least one driving signal generator, respectively coupled to at least one light emitting diode string, and respectively generating at least one driving signal to drive the light emitting diode strings, respectively;
• at least one detection device, coupled to a detection point of the respective light emitting diode string and respectively coupled to the driving signal generators, and the respective detection device comparing a first detection voltage on the detection point of a corresponding first light emitting diode string with a plurality of second detection voltages on the detection points of a plurality of remaining second light emitting diode strings to generate a detection result,
• wherein the respective driving signal generator determines whether to stop generating the respective driving signal according to the detection result generated by the corresponding detection device,
• wherein the driving signal generators provide the driving signals less than a predetermined current to the light emitting diode strings within a test time interval, and the respective detection device generates the corresponding detection result within the test time interval.

A driving method, adapted to drive at least one light emitting diode string, and comprising:

• respectively generating at least one driving signal to drive the light emitting diode strings, respectively, and generating a plurality of detection voltages on a plurality of detection points of the light emitting diode strings;
• comparing a first detection voltage among the detection voltages with a plurality of all remaining second detection voltages among the detection voltages to generate a detection result of the light emitting diode string corresponding to the first detection voltage;
• and
• determining whether to stop generating the driving signal of the corresponding light emitting diode string according to the detection result corresponding to the first detection voltage,
• wherein the driving signals less than a predetermined current are provided to the light emitting diode strings within a test time interval, and the corresponding detection result is generated within the test time interval.