Shielding Layer Transparent Conductive Noise Reduction
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Solution Overview
Problem
Integrated touch sensors in display devices face issues with image quality deterioration and touch noise due to high driving voltage, particularly when using in-cell type touch sensors, leading to misrecognition of touch inputs and ghost phenomena.
Innovation Solution
A display device design that includes a shielding layer with a transparent conductive layer between the touch sensitive element and the display panel to mitigate electrical noise, ensuring the transparent conductive layer has the same potential as the touch sensor electrodes, thereby reducing interference and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a touch sensitive element is applied to a display panel with an in-cell type touch sensor, then touch sensitivity and integration are improved, but image quality deteriorates and touch noise increases due to high driving voltage
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the touch sensitive element and the display panel. This shielding layer includes a transparent conductive layer that acts as a mediator to block electrical noise from the high driving voltage while maintaining touch sensitivity, thus preventing image quality deterioration without compromising touch detection capability
2Force
If high driving voltage is applied to the touch sensitive element, then tactile feedback strength is improved, but electrical noise increases causing misrecognition of touch inputs
Solution Approach 1:
The shielding layer with transparent conductive layer serves as a mediator that allows strong tactile feedback from high driving voltage while blocking the electrical noise that would otherwise cause misrecognition of touch inputs, thus maintaining both feedback strength and recognition accuracy
3Object-affected harmful factors
If a shielding layer with transparent conductive layer is added, then electrical noise is reduced and image quality is maintained, but device complexity increases
Solution Approach 1:
The shielding layer is implemented as a thin film structure with transparent conductive layer that can be integrated into the existing display panel architecture. This thin film approach reduces electrical noise and maintains image quality while adding minimal structural complexity compared to bulk shielding materials
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 effectively minimizes touch input misrecognition and ghost phenomena by removing electrical noise, ensuring accurate touch sensing and maintaining display quality even at high driving voltages.
Implementation Method 1
a shielding layer with a transparent conductive layer between the touch sensitive element and the display panel to mitigate electrical noise, ensuring the transparent conductive layer has the same potential as the touch sensor electrodes
Data Source
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AI summary
Provided is a display device. The display device includes: a touch sensitive element including an electroactive layer and a plurality of electrodes disposed on at least one of the top surface and the bottom surface of the electroactive layer; a shielding layer on the touch sensitive element; a display panel on the shielding layer; and a touch sensor integrated in the display panel and including a plurality of first touch electrodes and a plurality of second touch electrodes spaced apart from the plurality of first touch electrodes, and the shielding layer is electrically connected with the plurality of first touch electrodes or the plurality of second touch electrodes.