Patent ID: 11929016
Assignee: MACROBLOCK, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A scan driver adapted to be used in a scan-type display apparatus that includes a light emitting diode (LED) array, the LED array having a common anode configuration, and including a plurality of scan lines and a plurality of LEDs, each of the LEDs being connected to a corresponding one of the scan lines, said scan driver comprising a plurality of scan driving circuits that respectively correspond to the scan lines, each of said scan driving circuits including:
a voltage generator having an output terminal that is connected to the scan line corresponding to said scan driving circuit, and configured to output one of an input voltage and a clamp voltage at said output terminal of said voltage generator; and
a detector connected to said output terminal of said voltage generator to receive a voltage at said output terminal of said voltage generator, further receiving a detection timing signal, and generating a detection signal that indicates whether any one of the LEDs connected to the scan line corresponding to said scan driving circuit is short circuited based on the voltage at said output terminal of said voltage generator and the detection timing signal;
wherein, with respect to each of said scan driving circuits, said detector includes
a comparator having a first input terminal that is connected to said output terminal of said voltage generator to receive the voltage at said output terminal of said voltage generator, a second input terminal that receives a predetermined reference voltage, and an output terminal that provides a comparison signal, and
a logic gate having a first input terminal that is connected to said output terminal of said comparator to receive the comparison signal, a second input terminal that receives the detection timing signal, and an output terminal that provides the detection signal.