Transparent Resin Substrate Touch Panel Display
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Solution Overview
Problem
Conventional touch panel displays using glass substrates are limited in thickness reduction and flexibility, preventing the realization of flexible displays even with in-cell systems.
Innovation Solution
A touch panel display utilizing a transparent resin substrate with embedded touch sensors and organic electroluminescence elements, featuring a shield electrode and integrated driving circuits, allows for a thinner and flexible design by using a transparent resin substrate and organic electroluminescence elements, enabling both touch detection and display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a glass substrate is used in a conventional touch panel display, then structural strength and stability are maintained, but thickness reduction and flexibility are limited
Solution Approach 1:
The patent replaces the rigid glass substrate with a flexible transparent resin substrate, enabling the display to be bent or folded while maintaining structural integrity. This thin film substrate achieves both thickness reduction and flexibility simultaneously, resolving the contradiction between thinness and strength.
Solution Approach 2:
The patent employs composite material structures including transparent resin substrates combined with flexible touch sensor layers and encapsulation films. This composite approach provides both mechanical flexibility and structural strength, allowing the display to be thin yet durable.
2Adaptability or versatility
If a glass substrate is used, then manufacturing precision and stability are maintained, but flexibility and adaptability for flexible displays are lost
Solution Approach 1:
The transparent resin substrate serves as a flexible shell that can be bent or folded, providing adaptability for flexible display applications. The substrate maintains manufacturing stability through controlled material properties and standardized fabrication processes, resolving the contradiction between flexibility and reliability.
3Length of moving object
If an in-cell system is adopted with glass substrate, then integration is improved, but thickness reduction is still limited
Solution Approach 1:
The flexible transparent resin substrate enables thinner overall device thickness compared to glass-based in-cell systems. The substrate's flexibility allows for compact integration of touch sensors and display elements without increasing thickness, resolving the contradiction between thinness and integration complexity.
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 solution achieves a thinner and more flexible touch panel display with improved manufacturing efficiency and cost-effectiveness, enabling both touch detection and display functionality while maintaining image visibility through the transparent substrate.
Implementation Method 1
pixels each including a first transistor and an organic electroluminescence element electrically connected with the first transistor
Implementation Method 2
a shield electrode located between the touch sensor and the display portion
Implementation Method 3
The pixels emitted light toward the transparent resin substrate
Data Source
AI summary
A touch panel display includes a pixel including an organic EL element, a first transistor electrically connected to the power supply line and the organic electroluminescence element, and a second transistor electrically connected to the data signal line and the first transistor, a touch sensor overlapping the pixel, and a shield electrode between the pixel and the touch sensor. The shield electrode includes an opening in a region overlapping with the second transistor, the third gate electrode is disposed inside the opening, and the third gate electrode and the fourth gate electrode are electrically connected, the first gate electrode is electrically connected to the shield electrode, and the second gate electrode is connected to a drain of the second transistor, and the shield electrode is grounded.