Patent ID: 7652663

Claim:
A display panel for an organic light emitting display (OLED) device having a display mode and an input mode, the display panel comprising: a driving unit having a control electrode coupled to a first node, a first electrode coupled to a first voltage source, and a second electrode; a capacitor coupled between the first node and the first voltage source; a light-emitting diode coupled between the second electrode of the driving unit and a second voltage source, wherein in the display mode, the light- emitting diode emits light according to voltage at the node; a light-detecting unit coupled between the first node and the first voltage source; and a detecting unit coupled to the first node and detecting a voltage at the first node in the input mode; wherein in the input mode, the light-emitting diode emits light to an object, and the detecting unit detects reflected light from the object such that voltage variation occurs at the first node; and wherein the light-detecting unit comprises a first transistor having a control electrode directly connected to the control electrode of the driving unit, a first electrode directly connected to the control electrode of the driving unit, and a second electrode directly connected to the first voltage source.