In-cell Touch Module Integrating Capacitive and Electromagnetic Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panels with both capacitive and electromagnetic modes require additional touch layers, increasing thickness and production cost, while also limiting light transmission and aperture ratio.
Innovation Solution
An in-cell touch module is developed, incorporating N data lines and common electrodes on an array substrate, where strip-like and U-shaped common electrodes are insulated and arranged at different layers, allowing for capacitive and electromagnetic touch detection without additional layers, by connecting data lines and common electrodes through switches to function in a time-division manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional electromagnetic touch layer and capacitive touch layer are provided, then both capacitive mode and electromagnetic mode touch functions are achieved, but the thickness of the touch panel increases
Solution Approach 1:
The patent merges the electromagnetic touch layer and capacitive touch layer into a single integrated touch layer. The touch electrode includes a first electrode for electromagnetic sensing and a second electrode for capacitive sensing, both formed in the same layer structure. This consolidation eliminates the need for separate additional layers while maintaining both touch modes, thereby reducing overall panel thickness.
Solution Approach 2:
The integrated touch layer is designed to perform multiple functions simultaneously. The first electrode serves for electromagnetic sensing while the second electrode serves for capacitive sensing, allowing the same layer structure to support both electromagnetic and capacitive touch modes without requiring dedicated separate layers for each function.
2Adaptability or versatility
If additional electromagnetic touch layer and capacitive touch layer are provided, then both capacitive mode and electromagnetic mode touch functions are achieved, but the production cost increases
Solution Approach 1:
By combining both touch mode functionalities into a single integrated touch layer, the patent reduces the number of manufacturing steps and material deposition processes required. Instead of separately forming and assembling multiple independent touch layers, the integrated design allows for streamlined production, reducing material costs and assembly complexity.
3Adaptability or versatility
If additional touch layers are provided, then both capacitive mode and electromagnetic mode touch functions are achieved, but the light transmission is reduced
Solution Approach 1:
The integration of both touch electrode types into a single layer reduces the total number of interfaces and material layers that light must traverse. This minimizes light scattering and absorption at layer boundaries, thereby improving overall light transmission compared to multi-layer add-on structures.
4Adaptability or versatility
If additional touch layers are provided, then both capacitive mode and electromagnetic mode touch functions are achieved, but the aperture ratio is reduced
Solution Approach 1:
The integrated touch layer design consolidates both electromagnetic and capacitive sensing elements within the same structural plane, optimizing the use of available space. This prevents the need for additional layer thickness that would reduce the effective aperture area, thereby maintaining a higher aperture ratio while supporting dual touch modes.
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 solution reduces the thickness and production cost of touch modules, enhances light transmission, and improves the aperture ratio by integrating touch functions within the display panel without additional layers.
Implementation Method 1
When the panel is touched by a finger, a coupling capacitance is generated between the finger and the capacitive touch driving electrode and the capacitive touch sensing electrode in the touch panel
Implementation Method 2
an open end of each U-shaped common electrode is connected to an electromagnetic touch scanning line
Data Source
AI summary
The present disclosure provides an in-cell touch module including N data lines arranged on an array substrate, and common electrodes insulated from, and arranged at a layer different from, the data lines. A (2n-1)th data line and a (2n)th data line are connected to each other through a switch, n is a positive integer, 2n is less than or equal to N, and N is an integer greater than 1. The common electrodes include a plurality of strip-like common electrodes and a plurality of U-shaped common electrodes. Each strip-like common electrode crosses the data lines, each U-shaped common electrode surrounds the respective strip-like common electrode, and each strip-like common electrode is insulated from each U-shaped common electrode. Each strip-like common electrode is connected to a capacitive touch sensing signal line, and an open end of each U-shaped common electrode is connected to an electromagnetic touch scanning line.