Methods for driving an OLED panel
AssigneeHimax Technologies Limited
InventorsKuo-Tung Hsu, Wei-Jen Chang
Life of this patent
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Abstract
A method for driving an organic light emitting display (OLED) panel having a plurality of organic light emitting diodes is provided. The organic light emitting diodes are coupled to a plurality of segment lines and a plurality of common lines in a matrix structure. The organic light emitting diodes coupled to the same common lines are divided into a plurality of groups according to colors of the OLED panel. Driving currents are provided to the organic light emitting diodes of the groups according to a plurality of pulse width modulation (PWM) manners. The PWM manners generate waveforms having pulse width corresponding to grayscale in a period, wherein each PWM manner corresponds to different colors of the OLED panel.
Claims23
A method for driving an organic light emitting display (OLED) panel having a plurality of organic light emitting diodes, wherein the organic light emitting diodes are coupled to a plurality of segment lines and a plurality of common lines in a matrix structure, and the method comprises:
- dividing the organic light emitting diodes coupled to the same common lines into a plurality of groups according to colors of the OLED panel;
- and
- providing driving currents to the organic light emitting diodes of the groups according to a plurality of pulse width modulation (PWM) manners, each corresponding to different colors of the OLED panel, wherein the PWM manners generate waveforms having pulse width corresponding to grayscale in a period, and the PWM manners comprise:
- a first PWM manner forming waveforms increased in pulse width by measurement from a starting time of the period;
- a second PWM manner forming waveforms increased in pulse width by measurement from an ending time of the period;
- and
- a third PWM manner forming waveforms increased in pulse width by measurement between the starting time and the ending time of the period.
A method for driving an organic light emitting display (OLED) panel having a plurality of organic light emitting diodes, wherein the organic light emitting diodes are coupled to a plurality of segment lines and a plurality of common lines in a matrix structure, and the method comprises:
- dividing the organic light emitting diodes coupled to the same common lines into a plurality of groups according to arrangement of the segment lines;
- dividing the group into a plurality of sub-groups;
- and
- providing driving currents to the organic light emitting diodes of the groups according to a plurality of pulse width modulation (PWM) manners, each corresponding to different sub-group, wherein the PWM manners generate waveforms having pulse width corresponding to grayscale in a period, and the PWM manners comprise:
- a first PWM manner forming waveforms increased in pulse width by measurement from a starting time of the period;
- a second PWM manner forming waveforms increased in pulse width by measurement from an ending time of the period;
- and
- a third PWM manner forming waveforms increased in pulse width by measurement between the starting time and the ending time of the period.
An organic light emitting display (OLED), comprising:
- a plurality of segment lines;
- a plurality of common lines;
- a plurality of organic light emitting diodes, electrically connected to the segment lines and the common lines in a matrix structure, wherein the organic light emitting diodes of one common line are divided into a plurality of groups according to colors of the OLED panel;
- and
- a segment driver coupled to the segment lines, for providing driving currents to the organic light emitting diodes of the groups according to a plurality of pulse width modulation (PWM) manners, each corresponding to different colors of the OLED panel, wherein the PWM manners generate waveforms having pulse width corresponding to grayscale in a period, and the waveforms representing the same grayscale of the PWM manners rise at different time points in the period except for a highest grayscale.
Dependencies are inferred from the claim text.