Display Driving Voltage Control for High-Luminance Power Reduction
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption while maintaining display quality, particularly when dealing with voltage drops in high luminance areas.
Innovation Solution
A display device with a driving controller that determines gate-source voltages based on input image signals and generates voltage control signals to optimize driving voltages, using an image processor and voltage controller to select the highest gate-source voltage and adjust for image patterns, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the driving voltage level is increased to maintain display quality in high luminance areas, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the driving voltage level adjustable and adaptive rather than fixed. The voltage generator dynamically changes the voltage level based on real-time analysis of image patterns by the driving controller, allowing the system to optimize between display quality and power consumption for different display scenarios
Solution Approach 2:
The patent implements parameter changes by modifying the voltage level parameter of the driving voltage based on image pattern characteristics. The driving controller analyzes image patterns and generates voltage control signals that adjust the voltage level parameter, enabling the system to adapt to different luminance requirements and reduce power consumption when high voltage is not needed
2Use of energy by moving object
If the driving voltage level is decreased to reduce power consumption, then power consumption is reduced, but display quality deteriorates in high luminance areas
Solution Approach 1:
The patent implements feedback by having the driving controller continuously analyze image patterns and use this information to adjust the driving voltage level. The system receives feedback from the image signal characteristics and dynamically adjusts the voltage level to maintain display quality while optimizing power consumption, preventing quality deterioration when voltage is reduced
3Illumination intensity
If a fixed high voltage level is applied to all pixels, then display quality is maintained across all areas, but power consumption increases unnecessarily in low luminance areas
Solution Approach 1:
The patent applies local quality by differentiating voltage level requirements for different display areas based on image patterns. Instead of applying uniform high voltage to all pixels, the system analyzes local image characteristics and adjusts the voltage level appropriately for each region, providing high voltage only where needed for high luminance areas while using lower voltage for low luminance areas
Data Source
AI summary
A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.