PWM PRECHARGE OF ORGANIC LIGHT EMITTING DIODE

摘要

PROBLEM TO BE SOLVED: To provide a method for PWM precharge of an organic light emitting diode (OLED).

SOLUTION: A method for nonlinear PWM precharge of an OLED comprises: a step to provide an OLED display including a pixel having a current source supplying current to the pixel, an anode and a cathode respectively; a step to assign the pixel of the OLED display with an address; a step to precharge the pixel assigned with the address to the illumination threshold; a step to regulate a threshold for switching from precharge of the pixel to a drive phase in accordance with the number of PWM counts to be used for the precharge; a step to precharge the pixel to a required forward voltage or a desired PWM count; a step to add light generated during the precharge to a desired light volume of the pixel; a step to drive the pixel with a current until a total light volume of the pixel including the light generated during the precharge is attained; and a step to discharge the pixel to be chosen to a level under the illumination threshold.

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