Touch Display Panel Drive Circuit for Compact Multi-Function Detection
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Solution Overview
Problem
Existing display panels with touch detection functions lack multifunctionality, as they do not effectively integrate advanced touch detection capabilities into their design.
Innovation Solution
The integration of drive electrodes and touch detection electrodes into a single chip, with the drive signal applied by an electrode drive section, allows for enhanced touch detection functionality, including the ability to detect touch events and control power supply efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If drive electrodes and touch detection electrodes are integrated into a single chip, then touch detection functionality is enhanced and circuit area is reduced, but device complexity increases
Solution Approach 1:
The patent combines drive electrodes and touch detection electrodes into a single integrated chip structure. The drive electrode and touch detection electrode are formed on the same substrate, sharing common circuitry and control mechanisms, which enhances touch detection functionality while optimizing circuit area utilization.
Solution Approach 2:
The integrated chip is designed to perform multiple functions: it serves both as a drive electrode for display control and as a touch detection electrode for sensing user input. This multi-functional design allows a single component to replace what would traditionally require separate dedicated components.
2Area of stationary object
If drive electrodes and touch detection electrodes are integrated into a single chip, then circuit area is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The integrated chip is divided into distinct functional regions: a drive electrode formation region and a touch detection electrode formation region. These regions are spatially segmented on the substrate, with clear boundary definitions that facilitate precise manufacturing while maintaining the integrated structure.
Solution Approach 2:
Different regions of the chip are optimized for their specific functions: the drive electrode region is designed with properties suitable for signal driving, while the touch detection region is optimized for sensitivity and signal reception. This local optimization allows each region to meet its specific manufacturing precision requirements.
3Ease of operation
If electrode drive section is integrated into a chip, then power supply control is improved, but device complexity increases
Solution Approach 1:
The electrode drive section is designed to be self-contained within the chip, with integrated power supply control circuitry that automatically manages the driving signals for both drive electrodes and touch detection electrodes. This self-service design simplifies external control while maintaining sophisticated internal power management.
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 enables more complex touch detection scanning and intricate power supply control, reducing the circuit area and allowing for more compact and flexible electronic units with improved touch detection performance.
Implementation Method 1
an AC signal applied to this common electrode is transmitted to the touch detection electrode via a capacitance between the common electrode and the touch detection electrode
Data Source
AI summary
There are provided a display panel with a touch detection function, a drive circuit, and an electronic unit, which make it possible to realize many functions related to touch detection. The display panel includes: one or more display elements; one or more drive electrodes extending in one direction; an electrode drive section integrated into a chip, and applying a drive signal to the drive electrodes; and one or more touch detection electrodes extending in a direction intersecting the direction in which the drive electrodes extend.