Dynamic Driving Voltage Adjustment for Display Power Efficiency
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Solution Overview
Problem
Display devices face high power consumption due to high driving voltages, which is not efficiently managed, especially when luminance and frame rate change, leading to increased energy usage.
Innovation Solution
A driving voltage supply system that adjusts the input driving voltage based on luminance and frame rate information using an input driving voltage corrector, which includes a luminance controller, offset calculator, and subtractor, to generate a second input driving voltage, reducing power consumption by adjusting the voltage level according to the display panel's conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high driving voltages are supplied to the data driver and scan driver, then the display device can operate properly and display images, but the power consumption increases
Solution Approach 1:
The patent implements dynamic voltage adjustment by making the driving voltage variable based on display conditions. The timing controller dynamically changes the driving voltage supplied to the data driver and scan driver according to the frame rate and luminance requirements, transitioning from static high voltage to adaptive voltage levels that match actual operational needs.
Solution Approach 2:
The patent changes the voltage parameter of the driving power based on display conditions. By adjusting the driving voltage level according to frame rate (e.g., higher voltage for high frame rates, lower voltage for low frame rates) and luminance requirements, the system optimizes power consumption while maintaining proper display operation.
2Productivity
If the driving voltage is increased to support higher luminance and frame rate, then the display performance improves, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts driving voltage based on real-time display requirements. When high luminance or high frame rate is needed, the timing controller increases the driving voltage; when lower performance is sufficient, it reduces the voltage, creating a dynamic match between performance and power consumption.
Solution Approach 2:
The patent varies the driving voltage parameter according to display performance requirements. By linking voltage levels to frame rate and luminance demands, the system achieves optimal power efficiency for each performance level without sacrificing the ability to deliver high performance when needed.
3Adaptability or versatility
If a fixed high driving voltage is supplied to ensure proper operation under all conditions, then the display can handle any luminance and frame rate requirement, but the power consumption is always high
Solution Approach 1:
The patent replaces fixed voltage with dynamic voltage adjustment. The timing controller continuously monitors display requirements and adjusts the driving voltage in real-time, allowing the system to adapt to different luminance and frame rate conditions while consuming only the necessary power for each specific operational state.
Solution Approach 2:
The system changes the driving voltage parameter based on actual display conditions rather than maintaining a constant high voltage. This allows the display to handle various luminance and frame rate requirements adaptively while optimizing power consumption for each specific operating point.
Data Source
AI summary
A display device includes the following elements: a display panel comprising pixels; a data driver supplying data signals to the plurality of pixels; a driving voltage supply supplying a first driving voltage to the data driver; a power supply supplying a first input driving voltage to the driving voltage supply; and a timing controller providing control signals to the data driver, the driving voltage supply, and the power supply and providing luminance information and per-second frame rate information of the display panel to the driving voltage supply. The driving voltage supply comprises an input driving voltage adjuster which adjusts the first input driving voltage to a second input driving voltage based on the luminance information and the per-second frame rate information.