Electrowetting Display Driving Method for Power Optimization
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Solution Overview
Problem
Electrowetting display apparatuses face high power consumption, particularly when displaying dynamic content or large changes in images, due to the demand for frequent voltage adjustments and short frame durations, which increases energy usage.
Innovation Solution
The implementation of a method that dynamically selects between DC and AC driving schemes based on the frame rate and difference in display effects between frames, using AC driving for dynamic content and DC driving for static content to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If AC driving scheme is used for dynamic content with large and frequent changes in display effects, then image switching efficiency is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the driving scheme adaptable and changeable based on real-time display content characteristics. The system dynamically switches between AC and DC driving schemes according to the frame rate and difference in display effects, transforming a static driving approach into a dynamic one that responds to content requirements, thereby resolving the contradiction between image switching efficiency and power consumption.
Solution Approach 2:
The patent changes the driving parameter (driving scheme type) based on display content characteristics. By monitoring frame rate and display effect differences, the system adjusts the driving scheme parameter between AC and DC modes, optimizing both image switching efficiency and power consumption for different content types.
2Use of energy by moving object
If DC driving scheme is used for static content with small and slow changes in display effects, then power consumption is reduced, but image switching efficiency decreases
Solution Approach 1:
The system dynamically selects the appropriate driving scheme based on content characteristics. For static content with small display effect changes, it dynamically chooses DC driving to reduce power consumption, while maintaining the capability to switch to AC driving when dynamic content is detected, thus resolving the contradiction between power savings and switching efficiency.
Solution Approach 2:
The driving scheme parameter is changed based on display content analysis. When the system detects static content with small frame differences, it switches to DC driving mode to minimize power consumption, while preserving the ability to transition to AC mode when dynamic content requires faster switching.
3Measurement precision
If frame rate is increased to display dynamic content, then image quality is improved, but power consumption increases due to frequent voltage adjustments
Solution Approach 1:
The patent changes the driving scheme parameter based on frame rate and display effect differences. When high frame rates are required for dynamic content, the system switches to AC driving which handles frequent voltage adjustments more efficiently, thereby maintaining image quality while managing power consumption better than DC driving would allow.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption by using AC driving for large and frequent changes in display effects while employing DC driving for small and slow changes, thereby improving image switching efficiency and reducing overall energy usage.
Implementation Method 1
The display elements of such a display device include two immiscible fluids. The configuration of the fluids can be controlled by applying a voltage to the display element
Data Source
AI summary
A method of driving an electrowetting display device having at least one display element for displaying a display effect during a display period. The method determines a change in the display effect. Depending on the change, the display may be driven using a first driving scheme or a second driving scheme. The second driving scheme applies a voltage indicative of the display state a different number of times during the display period than the first driving scheme.