Display Device Crosstalk Compensation via Adjacent Line Voltage Comparison
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Solution Overview
Problem
Display devices suffer from horizontal crosstalk effects, resulting in unintended bright or dark lines due to capacitive couplings between data and scan lines, which degrade image quality by causing line crosstalk across multiple horizontal lines.
Innovation Solution
A display device and driving method that incorporate a crosstalk compensator to calculate and apply compensation voltages by comparing data voltages across multiple adjacent horizontal lines, effectively canceling out horizontal crosstalk components by linearly combining calculated compensation voltages and applying them to data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data voltages are supplied to pixels through data lines, then display function is achieved, but horizontal crosstalk occurs between adjacent pixels causing unintended bright or dark lines
Solution Approach 1:
The patent applies preliminary action by calculating compensation voltages in advance based on the relationship between data voltages of adjacent horizontal lines before actual display. The compensation voltages are pre-computed to cancel out the horizontal crosstalk that would occur during normal operation, thereby eliminating the harmful effect before it manifests in the display output.
2Manufacturing precision
If multiple pixels are arranged in rows and columns, then high-resolution display is achieved, but line crosstalk effect occurs between pixels in the same row or column
Solution Approach 1:
The patent applies local quality by computing compensation voltages specifically for each horizontal line based on its adjacent lines' data voltages. Instead of applying a uniform compensation across the entire display, the compensation is locally tailored to each line's specific crosstalk conditions, allowing precise elimination of horizontal crosstalk while maintaining the high-resolution pixel arrangement.
3Reliability
If compensation voltage is added to data voltage, then horizontal crosstalk is canceled, but additional circuit complexity is introduced
Solution Approach 1:
The patent applies merging by integrating the compensation voltage generation function into the existing data driver circuitry. The crosstalk compensator is combined with the data driver to form a unified circuit that performs both data voltage generation and crosstalk compensation, thereby reducing overall circuit complexity while achieving effective horizontal crosstalk cancellation.
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
Prevents horizontal crosstalk over three or more horizontal lines, improving display quality by eliminating unintended bright or dark lines and enhancing image clarity.
Implementation Method 1
horizontal crosstalk effects, resulting in unintended bright or dark lines due to capacitive couplings between data and scan lines
Data Source
AI summary
A display device and a driving method thereof are disclosed. The display device includes a display panel including a plurality of pixels connected to data lines; a data driver connected to the data lines and configured to determine first data voltages corresponding to the pixels, to generate second data voltages by adding a compensation voltage to the first data voltages, and to supply the second data voltages to the pixels through the data lines; and a crosstalk compensator connected to the data driver and configured to calculate the compensation voltage by comparing the first data voltages corresponding to pixels disposed in at least three adjacent horizontal lines.