Source Driver Voltage Slew Rate Control Based on Luminance

The patent implements dynamic control of the boosting circuit by selectively enabling it based on the luminance level of the displayed image. The timing controller adjusts the source bias current dynamically - using a first source bias current when luminance exceeds a reference value (requiring fast voltage changes) and a second, lower source bias current when luminance is at or below the reference value. This dynamic adjustment allows the system to achieve high slew rates only when necessary, thereby reducing overall power consumption while maintaining performance when needed.

The patent changes the parameter of source bias current based on luminance conditions. The timing controller compares the luminance value with a reference value and selectively applies different source bias current levels. When luminance exceeds the reference value, a higher source bias current is applied to achieve faster slew rate; when luminance is at or below the reference value, a lower source bias current is applied. This parameter change approach optimizes the balance between slew rate uniformity and power management efficiency by adapting the electrical parameters to the actual display requirements.