Display Panel Row Compensation for Vertical Crosstalk
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Solution Overview
Problem
Display devices suffer from vertical crosstalk effects, which result in unintended bright or dark lines, degrading display quality due to the pattern of image frames.
Innovation Solution
A display device that applies a compensation coefficient to raw data supplied to a display panel, using a compensation driver to generate compensation data by calculating differences between adjacent pixel rows and applying these coefficients to adjust the data signals, thereby reducing vertical crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a display device displays image frames with high contrast patterns, then the visual impact and clarity of the image is improved, but vertical crosstalk effects occur causing unintended bright or dark lines that degrade display quality
Solution Approach 1:
The patent applies preliminary action by calculating compensation coefficients based on previous frame data before displaying the current frame. The compensation driver pre-computes the difference between adjacent pixel rows from the previous frame and uses this information to generate compensation data that counteracts the vertical crosstalk effect before it manifests in the current frame display, thereby preventing the harmful effect while maintaining high contrast imaging
Solution Approach 2:
The patent implements feedback by using the difference between adjacent pixel rows from previous frames to generate compensation coefficients that are applied to the current frame data. This feedback mechanism continuously adjusts the compensation based on observed patterns, allowing the system to adaptively reduce vertical crosstalk while preserving the intended image contrast and quality
2Manufacturing precision
If compensation coefficients are applied to reduce vertical crosstalk, then display quality is improved, but additional processing steps are required to calculate and apply compensation data
Solution Approach 1:
The patent applies segmentation by dividing the compensation process into distinct functional modules: a data comparator that calculates differences between adjacent pixel rows, a data converter that transforms the difference data into compensation coefficients, and a compensation driver that applies these coefficients to generate compensated image data. This modular segmentation organizes the complex processing into manageable, specialized components that work together systematically
Solution Approach 2:
The patent introduces an intermediary compensation driver between the image data source and the display panel. This intermediary component performs the compensation operation by calculating differences, generating compensation coefficients, and applying them to the image data before it reaches the display panel, thereby isolating the complexity of the compensation algorithm from both the data source and the display hardware
Data Source
AI summary
A display device includes a display panel including a plurality of pixel rows including a plurality of pixels; a compensation driver configured to generate an i-th compensation coefficient based on a difference between an (i−1)-th image data provided to an (i−1)-th pixel row among the plurality of pixel rows and an i-th image data provided to an i-th pixel row among the plurality of pixel rows, and configured to generate an i-th compensation data provided to the i-th pixel row by applying the i-th compensation coefficient to the i-th image data; and a data driver configured to generate a data signal based on the i-th compensation data and to supply the data signal to the i-th pixel row, wherein i is a natural number greater than 1.