Touch Electrode Merging Pixel and Touch Functions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Full In-Cell (FIC) capacitive touch screens, the integration of touch electrodes on the array substrate or color film substrate leads to issues like short circuits and abnormal connections between the touch lead and other signal lines, reducing product yield during manufacturing.
Innovation Solution
A touch electrode design featuring a plurality of stripe electrodes arranged in sequence with separation parts and segment electrodes, eliminating the need for an additional touch lead by integrating ends of the segment electrodes with a touch processing circuit, thus preventing short circuits and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an extra touch lead is used to connect to the touch electrode in FIC capacitive touch screen, then the touch electrode can be connected to the touch processing circuit, but short circuit between the touch lead and other signal lines or abnormal connection may occur, reducing product yield
Solution Approach 1:
The touch electrode is merged with the pixel electrode, sharing the same electrode structure and connection path. The touch electrode is formed as part of the pixel electrode structure, eliminating the need for a separate touch lead connection. This integration ensures that the touch electrode and pixel electrode are connected through the same transparent conductive layer and electrode structure, preventing short circuits and abnormal connections while maintaining reliable touch functionality.
Solution Approach 2:
The pixel electrode serves dual functions: as the display electrode for showing images and as the touch electrode for detecting touch input. By making the pixel electrode universal, it performs both display and touch sensing functions, eliminating the need for a dedicated separate touch electrode with its own connection lead, thus avoiding connection reliability issues.
2Adaptability or versatility
If an extra touch lead is added to connect the touch electrode, then the touch function can be implemented, but the manufacturing process becomes more complex and additional connection steps are required
Solution Approach 1:
The touch electrode structure is merged with the pixel electrode structure, sharing the same electrode pattern, transparent conductive layer, and connection paths. This integration eliminates the need for separate touch leads and additional connection structures, simplifying the overall device architecture while maintaining full touch functionality.
Solution Approach 2:
The pixel electrode is designed to serve multiple functions simultaneously - display and touch sensing. This multi-functionality reduces the number of separate components needed, simplifying the device structure and manufacturing process while achieving the desired touch capability.
3Ease of manufacture
If the touch electrode is integrated on the array substrate or color film substrate in a block structure, then the touch electrode can be formed, but the defect can be caused during the touch lead being manufactured, reducing the yield of the product
Solution Approach 1:
The touch electrode fabrication process is merged with the pixel electrode fabrication process. Both electrodes are formed using the same photolithography and deposition steps, eliminating the need for separate touch lead manufacturing and connection steps. This integration ensures that defects are not introduced during additional touch lead fabrication, improving product yield.
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 design enhances product yield by eliminating short circuits and abnormal connections, ensuring reliable touch functionality without additional touch leads, and maintains the display quality by optimizing the arrangement of stripe electrodes and separation parts.
Implementation Method 1
a projected capacitive touch screen is a type of commonly used touch screen, which utilizes a change in capacitance generated when a finger touches a capacitive touch panel to implement a touch function
Data Source
AI summary
A touch electrode, a driving method and a touch panel are provided. The touch electrode includes a plurality of stripe electrodes arranged in sequence at intervals, and each of the stripe electrodes includes a separation part for positioning a touch point as well as a first segment electrode and a segment separated by the separation part.