Array Substrate Touch Driving Signal Polarity Inversion
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Solution Overview
Problem
Liquid crystals in touch-enabled displays become polarized due to prolonged exposure to pulse signals of the same polarity, leading to poor display performance.
Innovation Solution
An array substrate with a driving signal module that outputs at least two types of touch driving signals with opposite polarities to each common electrode block, preventing prolonged exposure to pulse signals of the same polarity and reducing polarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pulse signals of the same polarity are continuously output to common electrode blocks for touch detection, then touch functionality is achieved, but liquid crystal polarization occurs leading to poor display performance
Solution Approach 1:
The patent applies periodic action by alternating the polarity of pulse signals output to common electrode blocks at different touch stages. Instead of continuously outputting signals of the same polarity, the system periodically switches between positive and negative polarity signals, which prevents cumulative polarization effects on the liquid crystal while maintaining continuous touch detection capability.
Solution Approach 2:
The patent employs inversion by reversing the polarity of touch driving signals at different time periods. Common electrode blocks that receive positive polarity signals in one touch stage receive negative polarity signals in subsequent touch stages, and vice versa. This inversion strategy effectively counteracts liquid crystal polarization while preserving touch sensitivity and display quality.
2Ease of operation
If common electrode blocks continuously provide pulse signals for touch detection, then touch sensitivity is maintained, but liquid crystal polarization accumulates causing display degradation
Solution Approach 1:
The system implements periodic action by systematically alternating the polarity of touch driving signals across different touch stages. This periodic polarity reversal prevents the accumulation of polarization effects on liquid crystal molecules while ensuring that touch sensitivity remains consistently high throughout operation.
Solution Approach 2:
The patent applies parameter changes by dynamically modifying the polarity parameter of touch driving signals. By changing the electrical polarity parameter between positive and negative at different time intervals, the system prevents polarization accumulation while maintaining optimal touch detection sensitivity.
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 approach improves display performance by minimizing liquid crystal polarization, enhancing display quality and refresh frequency while maintaining touch functionality.
Implementation Method 1
at the touch stage, the common electrode blocks generate respective electric fields when receiving pulse signals
Data Source
AI summary
The present disclosure relates to an array substrate, a display panel, a display device and a method for driving the array substrate, which avoid the common electrode block from providing pulse signals of a same polarity for a long time, thereby reducing probability of polarization of the liquid crystal and improving display performance. The array substrate, includes a common electrode layer, the common electrode layer including at least one common electrode block, at least one touch signal line, and a driving signal module; the common electrode layer including at least one common electrode block; wherein each touch signal line is connected with a corresponding common electrode block and the driving signal module, and the driving signal module outputs at least two types of touch driving signals with opposite polarities to at least one of the at least one common electrode block at each touch stage.