Dual-Sided Display Device Substrate Integration
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Solution Overview
Problem
Portable electronic devices with dual displays face challenges in achieving a compact, thin, and lightweight design due to the bulkiness of backlight units and semiconductor devices, which occupy significant space and hinder downsizing efforts.
Innovation Solution
A display device structure where multiple element substrates with light emitting elements face each other, with one substrate functioning as a sealing substrate for another, and sharing controller and power source circuits to reduce the number of IC chips and substrates, enabling a compact, thin, and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backlight unit and printed substrate mounting semiconductor devices are provided in a dual display device, then the display device can achieve high image quality and wide viewing angle, but the device becomes bulky and occupies significant space
Solution Approach 1:
The patent merges the sealing substrate function with an element substrate by making the second element substrate serve as the sealing substrate for the first element substrate. This integration eliminates the need for a separate sealing substrate and removes the backlight unit, significantly reducing device volume while maintaining the self-luminous characteristics and image quality of the display device
Solution Approach 2:
The second element substrate is designed to perform multiple functions: it serves as both a functional display element (with its own pixel portion and light emitting elements) and as the sealing substrate for the first element substrate. This multi-functionality reduces the total number of substrates from four to three, achieving downsizing without compromising display performance
2Reliability
If four substrates (two element substrates and two sealing substrates) are provided for dual display, then each display can be properly sealed and protected, but the device becomes heavier and more complex
Solution Approach 1:
The patent combines the sealing substrate function with the second element substrate, reducing the total substrate count from four to three. The second element substrate serves dual purposes: as a functional display element and as the sealing substrate for the first element substrate, thereby reducing weight while maintaining proper sealing protection
Solution Approach 2:
The second element substrate is designed to perform multiple functions simultaneously: it provides sealing protection for the first element substrate while also serving as a functional display element with its own pixel portion. This multi-functionality eliminates the need for separate sealing substrates, reducing overall device weight
3Reliability
If separate sealing substrates are provided for each element substrate in dual display configuration, then proper sealing is achieved, but the device complexity and number of components increase
Solution Approach 1:
The patent merges the sealing substrate function with the second element substrate, reducing the total number of substrates from four to three. This integration maintains proper sealing functionality while simplifying the overall device structure and reducing component count
Solution Approach 2:
The second element substrate is designed to perform multiple functions: it serves as both a functional display element and as the sealing substrate for the first element substrate. This multi-functionality reduces device complexity by eliminating redundant components while maintaining reliable sealing
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 configuration allows for a high-value added, compact, thin, and lightweight display device by reducing the number of substrates and semiconductor devices, while maintaining high image quality and wide viewing angles.
Implementation Method 1
a self-luminous element typified by an electroluminescence element has been developed
Data Source
AI summary
The invention provides a display device and an electronic device, each of which has one of a structure in which a substrate provided with a light emitting element which performs bottom light emission and a substrate provided with a light emitting element which performs top light emission are attached, and a structure in which two substrates, each of which is provided with a light emitting element which performs bottom light emission are attached. By attaching two substrates, each of which is provided with a light emitting element, displays are provided on the front and back of the display device, thus a high added value can be realized. One of the two substrates, each of which is provided with a light emitting element also functions as a sealing substrate for another substrate, thus a compact, thin, and lightweight display device can be obtained.