Pen-Touch Display Uplink Signals That Avoid TDX Interference
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Solution Overview
Problem
Concurrent pen touch driving and display driving in touch display devices often result in issues affecting display performance, leading to potential display panel problems.
Innovation Solution
A touch display device and driving method that utilize first and second uplink signals of different wavelengths or waveforms for touch electrodes, allowing simultaneous pen touch and display driving while preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pen touch driving and display driving are performed concurrently, then productivity is improved, but display quality deteriorates due to signal interference
Solution Approach 1:
The patent segments the uplink signal into multiple wavelength components (first wavelength and second wavelength) and assigns them to different touch electrodes. This segmentation allows the touch driving signals to be differentiated from display signals, enabling concurrent operation without interference and maintaining display quality.
Solution Approach 2:
The patent introduces wavelength as an additional dimension for signal differentiation. By using multiple wavelengths for uplink signals, the system can distinguish touch driving signals from display signals in the wavelength domain, allowing concurrent operation without compromising display quality.
2Device complexity
If single wavelength uplink signal is used, then device complexity is reduced, but pen touch performance deteriorates due to signal interference
Solution Approach 1:
The uplink signal is segmented into multiple wavelength components, with each component serving a specific touch electrode. This segmentation improves pen touch performance by enabling better signal differentiation and reducing interference, while the overall structure remains manageable through systematic assignment.
Solution Approach 2:
The patent changes the wavelength parameter of the uplink signal to create multiple distinct signal components. By varying the wavelength parameter across different touch electrodes, the system achieves improved pen touch performance through enhanced signal distinguishability.
3Productivity
If uplink signal is supplied during display active period, then productivity is improved, but harmful factors increase due to display issues
Solution Approach 1:
The patent uses wavelength as an additional dimension to separate touch driving signals from display signals. By assigning different wavelengths to uplink signals during the display active period, the system can transmit signals efficiently without creating harmful display interference, as the signals are distinguishable in the wavelength domain.
Solution Approach 2:
The patent uses wavelength differentiation as an intermediary mechanism to allow uplink signals to coexist with display signals during the active period. The wavelength parameter acts as a mediator that enables signal transmission while preventing harmful interference through spectral separation.
Data Source
AI summary
A touch display device and a driving method for the touch display device are disclosed. A touch circuit supplies an uplink signal to a touchscreen panel. A first uplink signal which is a first waveform signal is supplied to a first touch electrode. A second uplink signal which is a second waveform signal is supplied to a second touch electrode. The effect of the uplink signal on display driving is prevented.