Embedded Touch LED Panel Layout for Narrow Bezel and Low Noise
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Solution Overview
Problem
Existing display technologies face challenges in integrating touch sensors with light emitting diode (LED) displays, leading to increased bezel area, manufacturing complexity, and noise interference, while also lacking efficient power management.
Innovation Solution
A touch sensor embedded LED display device with a novel structure that includes a display substrate, light emitting diodes, transistors, and touch sensors, utilizing a relay electrode under the LED and conductive materials for touch routing, reducing bezel area and noise, and optimizing manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensors are integrated with LED displays using conventional methods, then touch functionality is achieved, but bezel area increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the touch sensor electrode and pixel electrode into a single integrated structure. The touch sensor electrode serves dual purposes: as part of the display pixel structure and as the touch sensing element, eliminating the need for separate touch sensor layers and reducing bezel area.
Solution Approach 2:
The pixel electrode is designed to perform multiple functions simultaneously: it serves as the display electrode for light emission control and as the touch sensor electrode for detecting touch input. This multi-functionality reduces the number of separate components needed.
2Adaptability or versatility
If touch sensors are integrated with LED displays using conventional methods, then touch functionality is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the fabrication processes for display electrodes and touch sensor electrodes into a single manufacturing flow. The same electrode layer is patterned to serve both display and touch functions, reducing the number of manufacturing steps and simplifying production.
3Reliability
If relay electrode is placed under LED with reflective material, then electrical connection is achieved, but noise interference increases
Solution Approach 1:
The patent introduces a ground electrode as an intermediary element between the relay electrode and the external environment. This ground electrode acts as a shield that intercepts and redirects electromagnetic noise, protecting the electrical connection between the relay electrode and LED.
4Weight of moving object
If display device is made thinner and lighter, then portability is improved, but structural support and component integration become more difficult
Solution Approach 1:
The patent merges multiple functional layers (display electrode layer, touch sensor layer, connection layers) into a single integrated electrode structure. This consolidation reduces the total number of layers and materials needed, thereby reducing weight while simplifying the integration process.
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 provides a thinner, lighter, and more manufacturable LED display with reduced bezel area and noise, while enabling efficient power consumption and simplified manufacturing.
Implementation Method 1
a light emitting diode disposed over the display substrate and including a first electrode and a second electrode
Implementation Method 2
The relay electrode may be located under the light emitting diode, overlap the light emitting diode, and include a reflective electrode material
Data Source
AI summary
The present disclosure provides a touch sensor embedded light emitting diode display device and a touch display panel. The device includes a substrate, a light emitting diode (LED) disposed over the substrate. The LED includes a first electrode and a second electrode. The device includes a pixel electrode electrically connected to the first electrode and a common electrode electrically connected to the second electrode. The device includes a driving transistor disposed over the substrate. The transistor includes an active layer, a source electrode, a drain electrode, and a gate electrode. The device includes a relay electrode electrically connecting the source electrode or drain electrode to the pixel electrode. The device includes a first touch sensor electrode disposed spaced apart from the light emitting diode and including the same conductive material as the pixel electrode.