Electronic Paper Page Transition Latency Reduction
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Solution Overview
Problem
Electronic paper displays (EPDs) face significant latency in updating images due to the time-consuming computation of waveforms needed to change pixel states, which is unacceptable for interactive applications requiring faster page transitions.
Innovation Solution
A page transition file creation system and method that uses an image buffer feeding module and a page transition block determination module to create and store page transition files, comprising headers and blocks that represent transitions across multiple pages, along with a waveform lookup table selection module to efficiently determine and apply waveforms for rapid color changes on EPDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If waveform computation is performed in real-time to accurately control pixel transitions, then color accuracy and transition precision are improved, but update latency increases significantly
Solution Approach 1:
The patent pre-computes waveform data for all possible pixel transition combinations and stores them in lookup tables during system initialization. When a page transition is requested, the controller simply retrieves the pre-computed waveforms from memory based on the current and target pixel states, eliminating real-time computation delays while maintaining accurate color transitions.
2Speed
If pre-computed lookup tables are used to reduce latency, then update speed is improved, but memory requirements and device complexity increase
Solution Approach 1:
The patent divides the lookup table into multiple segments organized by transition type (e.g., black-to-white, white-to-black, grayscale transitions). Each segment contains waveforms for a specific transition category. The controller selects only the relevant segment based on the current and target pixel states, reducing the amount of memory needed compared to storing all possible transitions in a single large table.
3Reliability
If multiple waveform sequences are stored for different transition scenarios, then transition accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent assigns different waveform characteristics to different pixel transition scenarios based on their specific requirements. For example, transitions from dark to light states use waveforms optimized for that direction, while transitions from light to dark use different waveforms. Each lookup table segment contains locally-optimized waveforms for its specific transition type, ensuring high accuracy without requiring a single complex universal waveform set.
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 significantly reduces the latency in displaying page transitions on EPDs, enabling faster and smoother flipping through pages, even in interactive applications, without increasing power consumption or hardware costs.
Implementation Method 1
electronic paper displays, sometimes called electrophoretic displays
Data Source
AI summary
A page transition file creation system and a method for creating a page transition file in a file format suitable for displaying transitions quickly on an electronic paper display. The page transition file creation system creates a page transition file with page transition blocks representing transition between two or more pages. A page transition display system and uses page transition files to display page transitions. The page transition display system determines the appropriate page transition file and waveform lookup table for displaying page transition. The page transition display system uses the determined page transition file and waveform lookup table for displaying the transition.