Display Driver Voltage Regulation for Content-Adaptive Power Saving
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Solution Overview
Problem
Display assemblies operating in a fixed voltage mode experience high power consumption due to dynamic changes in displayed content, as not all images require the brightest gray scale.
Innovation Solution
A voltage regulation method that determines the lowest working voltages required for the display driver circuit to display the highest gray scales of color channels, ensuring all gray scales can be displayed normally while reducing power consumption by adjusting the working voltage based on the highest gray scales of the image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display driver circuit works in a fixed voltage mode, then all gray scales can be displayed normally, but power consumption is high
Solution Approach 1:
The patent implements dynamic voltage regulation by continuously monitoring the maximum gray scale value of the current frame image and adjusting the power supply voltage accordingly. The voltage regulator switches between different voltage levels (e.g., 12V, 10V, 8V, 6V) based on the displayed content requirements, transforming the fixed voltage system into a dynamic adaptive system that matches power consumption to actual display needs.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on the maximum gray scale value detected in the image data. When the maximum gray scale is below a threshold, the voltage is reduced from the fixed high level to a lower level, thereby reducing power consumption while maintaining adequate display performance for the current content.
2Use of energy by moving object
If the working voltage is reduced to lower power consumption, then energy efficiency improves, but display quality may deteriorate
Solution Approach 1:
The patent employs a feedback mechanism where the processor detects the maximum gray scale value of the current frame image and uses this information to control the voltage regulator. This closed-loop feedback ensures that voltage is reduced only when display quality requirements allow, preventing deterioration of display performance while achieving energy savings.
Solution Approach 2:
The patent performs preliminary analysis of the image data to determine the maximum gray scale value before adjusting the voltage. By anticipating the display requirements and adjusting voltage proactively, the system avoids both unnecessary high voltage operation and voltage reduction that would compromise display quality.
Data Source
AI summary
This application provides a voltage regulation method, a terminal device, a chip, and a storage medium, relates to the field of display technologies, and can alleviate a problem of high power consumption of a display driver circuit in the terminal device. The voltage regulation method includes: obtaining highest gray scales of color channels of a to-be-displayed image; determining lowest working voltages required for the display driver circuit to display the highest gray scales of the color channels, to regulate a working voltages of a display circuit based on displayed content; and determining a maximum value of the lowest working voltages required for the display driver circuit to display the highest gray scales of the color channels as a target working voltage of the display driver circuit.