Electronic Paper Data Input System with Optical Code Patterns
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Solution Overview
Problem
Existing data input systems for electronic paper lack efficient methods for handwritten input and image storage, particularly when not integrated with a storage device, as they cannot retain and re-display overwritten images without power.
Innovation Solution
A data input system featuring electronic paper with optically readable code patterns and a stylus writing device that uses electric or magnetic fields to write and delete images, combined with a printer-type writing device for storing and retrieving handwritten data, allowing for repeated overwriting and storage of images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic paper is used without a tablet or integrated storage device, then portability and flexibility are improved, but the ability to retain and re-display overwritten images is worsened
Solution Approach 1:
The system separates the electronic paper display function from the storage and retrieval functions. The electronic paper maintains its portability while the stylus writing device with optical reading capability handles the storage and retrieval of code pattern information, enabling image retention without integrating a tablet into the electronic paper itself.
Solution Approach 2:
The stylus writing device acts as an intermediary between the electronic paper and the stored image data. It contains an optical reading device that reads code patterns on the electronic paper and stores the corresponding image information, allowing the electronic paper to retain portability while achieving reliable image retention through this mediating device.
2Measurement precision
If a tablet is integrated into electronic paper for digitizing handwritten input, then input accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The stylus writing device serves multiple functions: it acts as both the writing instrument for handwritten input and as the storage device for retaining image data. The optical reading device integrated into the stylus reads code patterns to enable accurate position detection, combining input and storage capabilities in a single device rather than requiring separate tablet and storage components.
Solution Approach 2:
The system uses the electronic paper's own code patterns as the basis for both display and input recognition. The optical reading device reads these existing code patterns to determine position information, eliminating the need for additional specialized sensing layers or tablets, thereby reducing device complexity while maintaining input accuracy.
3Measurement precision
If code patterns are formed on the display surface for position detection, then positional information accuracy is improved, but the visual quality of displayed images may be worsened
Solution Approach 1:
The code patterns are extracted from the visible display area and placed in regions that do not interfere with the primary image content. The optical reading device reads these code patterns which contain positional information, allowing accurate position detection while keeping the main display area dedicated to high-quality image presentation without code pattern interference.
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
Enables efficient handwritten input and storage of images on electronic paper, allowing for repeated overwriting and retention of images without power, by using optically readable code patterns and field-controlled particles, enhancing the functionality of electronic paper.
Implementation Method 1
coloring particles that are enclosed between the display substrate and the rear surface substrate and that are movable by applying an electric field or a magnetic field
Implementation Method 2
coloring particles that are enclosed between the display substrate and the rear surface substrate and that are movable by applying an electric field or a magnetic field
Implementation Method 3
an optical reading device for optically reading the code patterns formed on the display surface where the end of the stylus contacts
Data Source
AI summary
A data input system including electronic paper and a stylus writing device is disclosed. The electronic paper includes a transparent display substrate on which a number of optically readable code patterns have been formed, the optically readable code patterns representing positional information on a display surface, a rear surface substrate opposing the display substrate, and coloring particles that are enclosed between the display substrate and the rear surface substrate and that are movable by applying an electric or a magnetic field. The electronic paper displays an image due to motion of the particle. The stylus writing device includes a writing head provided at the end of the stylus for writing the image by applying an electric or a magnetic field to the electronic paper by contact and includes an optical reading device for optically reading the code patterns formed on the display surface where the end of the stylus contacts.