Integrated Touch Panel Structure Reducing Thickness
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Solution Overview
Problem
Conventional touch screens increase thickness and volume due to the mounting of a touch panel in front of the display panel, which also raises costs.
Innovation Solution
Integrating the touch panel into the upper substrate of the display panel, incorporating a transparent substrate, black matrix, protection layer, transparent electrodes, planarization layer, color filter, and common electrode to form touch sensing capacitors, thereby reducing thickness, volume, and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is mounted in front of a display panel to implement touch screen functions, then touch screen functionality is achieved, but thickness and volume of the touch screen are increased
Solution Approach 1:
The touch panel and display panel are merged into a single integrated structure where the touch sensing capacitors are formed directly on the display panel substrate. The transparent electrodes are disposed on the same substrate as the color filters, eliminating the need for a separate touch panel assembly and reducing overall thickness and volume.
2Adaptability or versatility
If a touch panel is mounted in front of a display panel to implement touch screen functions, then touch screen functionality is achieved, but cost is increased
Solution Approach 1:
The touch panel and display panel manufacturing processes are merged into a single integrated fabrication process. The transparent electrodes, color filters, and touch sensing capacitors are all formed on the same substrate using compatible manufacturing techniques, eliminating the need for separate touch panel assembly and reducing overall manufacturing cost.
3Device complexity
If transparent electrodes and color filters are integrated on the same substrate, then manufacturing complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The transparent electrodes are disposed in specific local regions corresponding to the pixel regions, with different electrode patterns and densities in different areas. The color filters are precisely aligned with the transparent electrodes in their respective pixel regions, allowing for localized optimization of both manufacturing processes and precision requirements.
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 integration reduces the overall thickness, volume, and cost of the touch screen while maintaining touch screen functionality, enhancing user experience and manufacturing efficiency.
Implementation Method 1
the first transparent electrode, the transparent substrate and an external electrode form a first touch sensing capacitor
Data Source
AI summary
An image displaying system is provided, in which a touch panel comprises a transparent substrate with a first surface and a second surface opposite to the first surface, a black matrix, a protection layer, at least one first transparent electrode, a planarization layer, a color filter and a common electrode. The black matrix is disposed on the second surface to define at least one transparent region. The protection layer is disposed on the black matrix and the transparent region, and the first transparent electrode is disposed on the protection layer and within the transparent region, wherein the first transparent electrode, the transparent substrate and an external electrode form a touch sensing capacitor. The planarization layer is disposed on the protection layer and the first transparent electrode, the color filter is disposed on the planarization layer, and the common electrode is disposed on the planarization layer and covering the color filter.