Electronic Ink Screen Driving Signal Duration Control
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Solution Overview
Problem
Electronic ink display apparatuses face challenges in reducing power consumption due to limited battery capacity, necessitating efficient control methods to extend battery life.
Innovation Solution
A control method for electronic ink screens that adjusts driving signals based on image colors and ambient temperature, using specific signal durations and phases for black, white, and chromatic pixels, and storing corresponding waveform files to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the electronic ink display apparatus uses a uniform refresh process for all color images, then the control logic is simple, but power consumption increases due to unnecessary long refresh durations for black-and-white images
Solution Approach 1:
The patent implements dynamic refresh duration adjustment based on image color content. The control logic detects whether the image contains chromatic colors and automatically selects between a first refresh duration (for black-and-white images) and a second refresh duration (for chromatic images), optimizing power consumption while maintaining display quality
Solution Approach 2:
The patent changes the refresh duration parameter according to the image color characteristics. By detecting the presence of chromatic colors and adjusting the refresh duration accordingly, the system achieves energy optimization without requiring complex control logic, as the parameter adjustment is based on simple color detection
2Reliability
If the refresh duration is extended to ensure proper particle movement for chromatic images, then display quality for chromatic images is maintained, but refresh time for black-and-white images increases unnecessarily
Solution Approach 1:
The patent applies partial action by providing different refresh durations based on image requirements. Chromatic images receive the full second refresh duration to ensure proper particle movement and display quality, while black-and-white images use a shortened first refresh duration, eliminating unnecessary time consumption without compromising display quality for images that actually need it
3Reliability
If temperature compensation is implemented for different ambient conditions, then display performance is optimized across temperature ranges, but the number of driving signal groups and waveform files increases
Solution Approach 1:
The patent segments the temperature range into multiple intervals and assigns different driving signal groups to each segment. This allows the system to optimize display performance for specific temperature conditions while keeping the number of signal groups manageable through systematic categorization
Solution Approach 2:
The patent creates driving signal groups that serve multiple functions - each group is designed to work across different color image types (black-and-white and chromatic) while being optimized for its specific temperature range. This multi-functionality reduces the overall number of signal groups needed compared to having separate signals for each color-temperature combination
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
The method reduces power consumption by synchronizing refresh processes and adapting to different color images, specifically shortening refresh time for black-and-white images, thereby extending battery life and reducing the frequency of battery replacements.
Implementation Method 1
the electronic ink can change color under action of an electric field
Data Source
AI summary
A control method for an electronic ink screen includes: when colors of an image to be displayed include only a black color and a white color, outputting a first black driving signal, and outputting a first white driving signal; and when the colors of the image to be displayed include the black color, the white color and a chromatic color, outputting a second black driving signal, outputting a second white driving signal, and outputting a chromatic driving signal. A duration of the first black driving signal is equal to a duration of the first white driving signal. A duration of the second black driving signal, a duration of the second white driving signal and the duration of the chromatic driving signal are equal. The duration of the second white driving signal is greater than the duration of the first white drive signal.