Patent ID: 7928934

Claim:
An AMOLED (organic light emitting diode) display comprising: an organic light emitting device; a pixel circuit having a 3 transistor-1 capacitor (3T-1C) structure having only three transistors and only one capacitor, the pixel circuit including, a driving transistor comprising a drain connected to the organic light emitting device and a source supplied with a driving voltage for driving the organic light emitting device; a memory capacitor connected to a gate and the source of the driving transistor in parallel; a switching transistor comprising a gate and a drain supplied with scan and data signals, respectively, and a source connected to the gate of the driving transistor; a programming transistor comprising a gate and a drain respectively connected to the gate and drain of the switching transistor and a source connected to the drain of the driving transistor; and a current controller determining a current flowing through the driving and programming transistors; wherein said driving voltage switches between a first voltage level and a second voltage level, said first voltage level is sufficient to turn on the organic light emitting device, said second voltage level is sufficient to turn off the organic light emitting device, and said programming and switching transistors are simultaneously or concurrently activated during a period starting after said driving voltage switches from said first voltage level to said second voltage level and ending before said driving voltage switches from said second voltage level to said first voltage level.