Touch Display Panel Signal Line Segmentation for Detection Speed
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Solution Overview
Problem
Conventional self-capacitive touch display panels require time-sharing transmission of drive and sensing signals, leading to longer detection times and reduced efficiency in touch detection.
Innovation Solution
The introduction of a touch display panel with separate first and second signal lines, where the second signal line is insulated from the touch electrode, forming a mutual capacitor, allowing simultaneous transmission of drive and sensing signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same signal line is used to transmit both drive signal and sensing-detection signal in a self-capacitive touch display panel, then the device structure is simplified, but the touch detection time increases due to time-sharing transmission
Solution Approach 1:
The patent divides the signal transmission function into two separate signal lines: one dedicated to drive signal transmission and another dedicated to sensing-detection signal transmission. This segmentation eliminates the need for time-sharing and enables simultaneous transmission, directly resolving the contradiction between structural simplicity and detection speed.
Solution Approach 2:
The patent introduces a spatial dimension solution by adding a second signal line layer that is insulated from the touch electrode. This dimensional approach allows both drive and sensing signals to coexist in different spatial dimensions (different signal lines), enabling simultaneous transmission without interfering with each other.
2Productivity
If separate first and second signal lines are provided for simultaneous transmission of drive and sensing signals, then touch detection efficiency is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the touch display panel structure with the touch detection structure by integrating the second signal line into the existing panel architecture. The second signal line is insulated from the touch electrode and incorporated within the panel's layered structure, allowing simultaneous signal transmission while maintaining a unified, compact design rather than adding separate external components.
3Productivity
If the second signal line is insulated from the first electrode block, then a mutual capacitor is formed enabling simultaneous signal transmission, but the insulation requirement increases manufacturing complexity
Solution Approach 1:
The patent introduces an insulation layer as an intermediary between the second signal line and the first electrode block. This insulation layer acts as a mediator that enables the formation of a mutual capacitor while maintaining electrical isolation, thus allowing simultaneous transmission of drive and sensing signals without direct contact between the signal line and electrode.
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 configuration improves the efficiency of touch detection by enabling simultaneous transmission of drive and sensing signals, reducing detection time and enhancing overall performance.
Implementation Method 1
a mutual capacitor is formed between the second signal line and the first signal line
Implementation Method 2
the second signal line is insulated from the first electrode block
Data Source
AI summary
A touch display panel is provided. The touch display panel includes a touch electrode layer and a plurality of first signal lines, where the touch electrode layer includes a plurality of first electrode blocks, and each of the first electrode blocks is electrically connected to a corresponding first signal line. The touch display panel further includes a plurality of second signal lines, where a projection region of the first electrode block in a direction perpendicular to the touch display panel includes at least one second signal line, and the second signal line is insulated from the first electrode block.