Display Data Driver Bias Current Control for Power Optimization
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Solution Overview
Problem
Display devices, such as LCDs and OLEDs, face high power consumption, particularly static power consumption, in their data drivers due to the continuous operation of various driving blocks during a frame period, which affects energy efficiency.
Innovation Solution
A display device and driving method that includes a data driver with a bias current control signal generator to determine the magnitude of the bias current based on image pattern information, allowing certain driving blocks to be stopped during a frame period except for the bias unit, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data driver continuously operates various driving blocks during a frame period, then stable image display is ensured, but static power consumption increases
Solution Approach 1:
The patent applies dynamics by making the bias current adjustable based on image pattern characteristics. The data driver dynamically adapts its operating state by switching between different bias current levels (first bias current for high-frequency patterns, second bias current for low-frequency patterns), allowing the system to transition between performance and power-saving modes based on real-time conditions
Solution Approach 2:
The patent changes the bias current parameter according to image pattern frequency characteristics. By detecting whether the image pattern is high-frequency or low-frequency and相应ly adjusting the bias current magnitude, the system optimizes the balance between display stability and power consumption without compromising image quality
2Reliability
If the bias current is increased to ensure stable operation of the data driver, then operation reliability improves, but power consumption increases
Solution Approach 1:
The patent changes the bias current parameter according to image pattern frequency characteristics. By detecting whether the image pattern is high-frequency or low-frequency and相应ly adjusting the bias current magnitude, the system optimizes the balance between display stability and power consumption without compromising image quality
Data Source
AI summary
A display device including: a display panel including pixels and data lines; a data driver configured to apply data voltages to the data lines; an image pattern determiner configured to determine an image pattern based on an input image signal and to generate image pattern information; and a bias current control signal generator configured to generate a bias current control signal for determining a magnitude of a bias current of the data driver based on the image pattern information.