Patent ID: 8917353

Claim:
An image apparatus comprising: a voltage generator configured to generate a first voltage and a second voltage, the second voltage having two or more high states and two or more low states in one image frame; a display unit comprising a plurality of pixels, configured to receive the first and second voltages, a data signal, and a gate signal, and configured to be lit or unlit corresponding to the first and second voltages, the data signal, and the gate signal; a controller configured to receive the second voltage and to output a feedback signal corresponding to at least one of a rising edge or a falling edge of the second voltage; an IR signal transmitter configured to receive the feedback signal and to output an IR signal corresponding to at least one of the rising edge or the falling edge of the second voltage; and shutter glasses comprising a left shutter, a right shutter, and a shutter controller that is configured to receive the IR signal and to control opening or closing of the left shutter and the right shutter corresponding to the IR signal, wherein each of the plurality of pixels is configured to receive the first and second voltages at corresponding first and second voltage supplies, the first and second voltage supplies being in a current path when a corresponding one of the pixels is lit.