Touch Display Panel Drive Switching to Limit Detection Interference
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Solution Overview
Problem
Display operation in touch detection panels is affected by touch detection operations, and existing technologies do not adequately address this issue.
Innovation Solution
A display panel with integrated touch detection functionality that includes drive electrodes and touch detection electrodes, utilizing DC and AC drive signals to minimize interference between display and touch detection operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a capacitance-type touch panel is integrated with display functionality, then the device can achieve low power consumption and simple structure, but display operation is affected by touch detection operation
Solution Approach 1:
The patent divides the drive electrode into two functional segments: a first drive electrode for display operation and a second drive electrode for touch detection. By segmenting the electrode functions, the display and touch detection operations can be performed independently without mutual interference, resolving the contradiction between structural simplicity and display operation stability.
Solution Approach 2:
The patent implements multi-functionality by enabling the same drive electrode structure to serve dual purposes: display driving and touch detection. The drive electrode can be selectively activated for either function based on control signals, allowing one structural element to perform multiple functions without compromising the other.
2Device complexity
If the same drive electrode is used for both display and touch detection, then device complexity is reduced, but touch detection accuracy is degraded due to display operation interference
Solution Approach 1:
The patent segments the drive electrode into a first drive electrode for display and a second drive electrode for touch detection. This segmentation allows independent optimization of each electrode for its specific function, ensuring touch detection accuracy while maintaining overall device simplicity.
Solution Approach 2:
The patent introduces dynamic control where the drive electrode can be selectively activated for either display or touch detection function based on real-time control signals. This dynamic switching capability allows the system to adapt between functions, preventing interference and maintaining detection accuracy when needed.
3Speed
If AC drive signal is applied continuously to drive electrodes, then touch detection responsiveness is improved, but display operation is disrupted
Solution Approach 1:
The patent segments the drive electrode operation into distinct time periods: a first period for display operation with DC drive signal and a second period for touch detection with AC drive signal. This temporal segmentation allows both functions to operate optimally without disrupting the other, maintaining display continuity while ensuring touch responsiveness.
Solution Approach 2:
The patent implements periodic action by alternating between DC drive signal for display and AC drive signal for touch detection in a cyclic manner. This periodic switching allows the system to maintain touch detection responsiveness through regular AC signaling while preserving display operation during DC signaling periods.
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
The selective application of DC or AC drive signals reduces the impact of touch detection on display operation, enhancing the responsiveness and accuracy of both functions.
Implementation Method 1
a drive section that selectively applies a DC drive signal or an AC drive signal to the drive electrodes
Data Source
AI summary
A display panel with a touch detection function, in which display operation is less affected by touch detection operation, a method of driving the display panel with a touch detection function, a driving circuit, and an electronic unit having the display panel with a touch detection function are disclosed. The display panel with a touch detection function includes: one or more display elements; one or more drive electrodes; one or more touch detection electrodes; and a drive section selectively applying a DC drive signal or an AC drive signal to the drive electrodes.