Image Display Medium with Segmented Electrodes and External Drive
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Solution Overview
Problem
Conventional image display technologies face challenges in achieving high resolution and reliable electrical connections for image display media, such as electronic paper, which require complex wiring and bulky connectors, limiting portability and flexibility.
Innovation Solution
An image display medium with a display layer sandwiched between transparent substrates, featuring separate scan electrode groups and connection wire groups, allowing for detachable and reliable electrical connections using anisotropic conductive materials and clip connectors, eliminating the need for internal drive circuits and reducing wire density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional liquid crystal displays use integrated drive circuits and common wires for image signal transmission, then the number of connector wires can be reduced to standard bits (16 or 32), but the device becomes bulky and less portable due to the need for internal drive circuits and complex wiring
Solution Approach 1:
The patent extracts the drive circuits from the display device itself and places them in an external writing device. The display medium only contains the display layer with electrode patterns, while the drive functionality is separated into a portable writing device that connects via a simple connector, eliminating the need for bulky internal drive circuits in the display unit.
Solution Approach 2:
The system is divided into two separate functional units: a lightweight display medium containing only the display layer and electrode patterns, and a separate writing device containing the drive circuits. This segmentation allows the display medium to be lightweight and portable while the writing device handles the complex drive functions.
2Measurement precision
If high resolution image display is achieved with several tens to several hundreds of dots per inch, then image quality improves, but the number of electrodes and wiring complexity increases significantly
Solution Approach 1:
The electrode structure is segmented into two independent groups: first scan electrodes extending in the column direction and second scan electrodes extending in the row direction. This segmentation allows high-resolution display by creating a matrix of intersection points between the two electrode groups, reducing the complexity of individual electrode patterns while achieving high overall resolution.
Solution Approach 2:
The patent transitions from a single-dimensional electrode structure to a two-dimensional matrix structure by introducing two sets of electrodes oriented in perpendicular directions. The first scan electrodes in the column direction intersect with the second scan electrodes in the row direction to form pixel elements, enabling high-resolution display through dimensional expansion.
3Reliability
If electrical connection connector is integrated with display elements on the same substrate, then electrical connection is achieved, but the connection reliability decreases due to the complexity of integrating multiple functions in a limited space
Solution Approach 1:
The electrical connection connector is extracted from the display substrate and placed in a separate writing device. The connector on the display side has a simplified structure with only electrical contact portions, while the complex drive circuitry is located in the writing device, improving connection reliability by reducing the complexity of the integrated structure.
Solution Approach 2:
The patent introduces an intermediary connector structure that facilitates reliable electrical connection between the display medium and writing device. The connector includes contact portions that align with electrode patterns, serving as a mediator that ensures stable electrical connection while maintaining the separation of display and drive functions.
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 lightweight, flexible, and high-resolution image display with improved portability by simplifying the connection mechanism and reducing the number of wires, while maintaining image retention even after the connection is removed.
Implementation Method 1
a display layer (18) in which a display is formed by electrical action
Implementation Method 2
a display layer (18) in which a display is formed by electrical action
Implementation Method 3
utilizing anisotropic conductive materials
Data Source
AI summary
An image display medium comprising: a display layer; a pair of substrates that retain the display layer therebetween, with at least parts of the pair of substrates configuring a frame portion to which an electrical connection connector for electrical connection to the outside connects, and with at least one of the pair of substrates being transparent; a first scan electrode group; a second scan electrode group; a first electrical contact group; a second electrical contact group; a first connection wire group; and a second connection wire group, wherein the first electrical contact group and the second electrical contact group are disposed apart from each other a distance that is greater than the distance between two mutually adjacent contacts belonging to the first electrical contact group or the second electrical contact group along at least one of a thickness direction and a surface direction of the pair of substrates, is provided.