Patent ID: 7586470

Claim:
An organic light emitting diode (OLED) device capable of adjusting luminance, the OLED device comprising: a control voltage generator comprising: a reference current source for providing a reference current; and a first transistor comprising: a first end coupled to the reference current source; a second end coupled to a first voltage source; and a control end, the control voltage generator being utilized for generating a control voltage according the reference current at the control end of the first transistor; a plurality of first switches, a first end of each first switch coupled to the control end of the first transistor; a current mirror comprising a first end and a second end; a plurality of second transistors, each second transistor comprising: a first end coupled to the first end of the current mirror; a second end coupled to the first voltage source; and a control end coupled to a second end corresponding to a first switch of the plurality of first switches; a control circuit coupled to the plurality of first switches for controlling turning on and off the plurality of the first switches respectively; a second switch comprising: a first end coupled to the first voltage source; and a second end; and a first OLED module coupled between the second end of the current mirror and the second end of the second switch for generating light.