Patent ID: 8743104
Filing Date: 2014-06-03
Classification: G09G

Abstract:
1. An organic light emitting display, comprising: a gate driving circuit for providing a gate signal; a data driving circuit for providing a data signal; a gate line, electrically connected to the gate driving circuit, for delivering the gate signal; a data line, electrically connected to the data driving circuit, for delivering the data signal; a current driving unit, electrically connected to the gate line and the data line, for generating a driving voltage according to the gate signal and the data signal, and for providing a driving current according to the driving voltage and a high power voltage; an organic light emitting diode, electrically connected to the current driving unit, for generating a light output according to the driving current; a memory unit, electrically connected to the current driving unit, for performing a voltage retaining operation on the driving voltage according to a first auxiliary power voltage and a second auxiliary power voltage; and a voltage providing module, electrically connected to the current driving unit and the memory unit, for providing the high power voltage, the first auxiliary power voltage and the second auxiliary power voltage; wherein the memory unit is enabled to perform the voltage retaining operation when the first auxiliary power voltage is a high auxiliary power voltage and the second auxiliary power voltage is a low auxiliary power voltage, and the memory unit is disabled for ceasing the voltage retaining operation when the first auxiliary power voltage is the low auxiliary power voltage and the second auxiliary power voltage is the high auxiliary power voltage; wherein the voltage providing module comprises: a power unit for providing a first high power voltage, a second high power voltage lower than the first high power voltage, the high auxiliary power voltage and the low auxiliary power voltage; a first voltage selector, electrically connected to the power unit and the current driving unit, for selecting either the first high power voltage or the second high power voltage to become the high power voltage; a second voltage selector, electrically connected to the power unit and the memory unit, for selecting either the high auxiliary power voltage or the low auxiliary power voltage to become the first auxiliary power voltage; and a third voltage selector, electrically connected to the power unit and the memory unit, for selecting either the low auxiliary power voltage or the high auxiliary power voltage to become the second auxiliary power voltage; wherein the first voltage selector selects the second high power voltage to become the high power voltage when the first auxiliary power voltage is the high auxiliary power voltage and the second auxiliary power voltage is the low auxiliary power voltage, and the first voltage selector selects the first high bower voltage to become the high power voltage when the first auxiliary power voltage is the low auxiliary power voltage and the second auxiliary power voltage is the high auxiliary power voltage.