Display Driver Bias Core for Dual-Voltage Current Control

The patent merges the low voltage bias core and high voltage bias core into a single integrated bias core that can generate both low voltage bias current and high voltage bias current. This is achieved by configuring the bias core to include both low voltage bias units and high voltage bias units that share common circuit elements, thereby reducing chip area and part count while maintaining the ability to provide both types of bias currents.

The bias core is designed with multi-functionality to serve both low voltage and high voltage bias current generation purposes. The same bias core structure and circuit elements are utilized to generate both low voltage bias current for digital signal processing and high voltage bias current for analog signal processing, eliminating the need for separate dedicated cores.

The patent combines multiple bias current generation functions into a single integrated bias core structure. The low voltage bias units and high voltage bias units are merged within the same core, sharing common circuit elements such as current mirrors and bias generation circuits, thereby reducing the total number of parts while ensuring reliable provision of both bias currents.

The bias core is designed as a universal component that can generate both low voltage bias current and high voltage bias current through its multi-functional units. This universal design reduces part count by eliminating redundant components that would exist if separate dedicated bias cores were used for each voltage level.

The patent implements feedback control mechanisms within the bias core to precisely control the high voltage bias current. The low voltage bias units generate a reference current that serves as a feedback signal to control the high voltage bias units, ensuring precise current control through closed-loop regulation. This feedback approach allows accurate control of high voltage bias current by using the stable low voltage bias current as a reference.

The patent uses low voltage bias current as an intermediary to control the high voltage bias current. The low voltage bias units act as a mediator that generates a precise reference current, which then controls the high voltage bias units through current mirrors and amplification stages. This intermediary approach enables precise control of high voltage current by leveraging the stability and precision of low voltage bias generation.