DRIVING MECHANISM OF LIGHT EMITTING DISPLAY PANEL AND DRIVING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem that light emitting elements are irregularly lit up by accompanying the measurement of a forward voltage in supplying an appropriate driving voltage to a display panel side based on the forward voltage of the light emitting elements.

SOLUTION: A measuring current of the value smaller than the light emitting driving current If for causing the light emission display of the light emitting element is supplied to an anode line An. The forward voltage value Vs of the light emitting element of this time is acquired by a sample-hold circuit 12. The information is sent to a light emission control circuit 11. The light emission control circuit 11 acquires the information corresponding to the forward voltage value Vf of the light emitting element when the light emission driving current If is supplied to the light emitting element from a data table 11. The output voltage VH of a DC-DC converter is controlled based on the information of the forward voltage value Vf.

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