Touch Display Panel Polarity Adjustment for Horizontal Stripes
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Solution Overview
Problem
In touch and display driver integration (TDDI) technology, heavy-load pictures with large gray scale spans cause uneven recovery of touch electrodes, leading to horizontal stripes due to differing coupling degrees, which affect display quality.
Innovation Solution
A method for driving a touch display panel that involves acquiring image data, judging if it's a heavy-load picture, and adjusting the polarity of data signals to ensure adjacent data line groups have opposite polarities, while same data line groups have the same polarity, thereby preventing horizontal stripes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the default polarity mode is used for displaying heavy-load pictures, then the display can show images with large gray scale spans, but horizontal stripes appear due to uneven recovery of touch electrodes
Solution Approach 1:
The patent applies dynamic polarity adjustment by detecting whether the current display content is a heavy-load picture and switching between default polarity mode and adjusted polarity mode accordingly. This dynamic adaptation allows the system to maintain optimal display quality for different types of content, preventing horizontal stripes during heavy-load picture display while preserving the default mode for normal content.
Solution Approach 2:
The patent changes the polarity parameter of data signals based on the detected picture type. When a heavy-load picture is detected, the system adjusts the polarity of data signals to ensure uniform touch electrode recovery across all regions, thereby eliminating horizontal stripes while maintaining the ability to display large gray scale spans.
2Manufacturing precision
If polarity adjustment is performed to prevent horizontal stripes, then display quality is maintained, but additional processing steps are required
Solution Approach 1:
The patent performs preliminary detection of the display content to identify heavy-load pictures before displaying them. This advance detection allows the system to pre-adjust the polarity mode, ensuring that the correct polarity configuration is in place before the heavy-load picture is displayed, thereby preventing horizontal stripes without requiring complex real-time adjustments during display.
Solution Approach 2:
The patent implements a feedback mechanism where the display content is continuously monitored and analyzed to detect heavy-load pictures. Based on this feedback, the system automatically adjusts the polarity mode, creating a closed-loop control system that maintains display quality while keeping the processing logic relatively simple through automated decision-making.
Data Source
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AI summary
Disclosed are a drive method and device for a touch display panel. The drive method comprises: obtaining image data of an image to be displayed; determining whether the obtained image data is a heavily loaded screen having a default polarity mode; if it is determined that the obtained image data is a heavily loaded screen having a default polarity mode, performing polarity adjustment on the image data; and driving, according to the polarity-adjusted image data, a touch display panel to perform image display, wherein the default polarity mode comprises that the polarities of image data corresponding to every two adjacent data lines are opposite, and the polarities of image data corresponding to a same data line are the same.