Display Data Divider and Compensator for Crosstalk Reduction
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Solution Overview
Problem
Display devices, such as liquid crystal and organic light emitting displays, suffer from line crosstalk defects that result in unintended bright or dark lines, degrading image quality due to the pattern of image frames.
Innovation Solution
A display device with a data driver that provides alternating data voltages to data output lines and a data divider that couples these lines to different data lines at specific periods, along with a data compensator that calculates and compensates for load differences and crosstalk amounts using weight values to adjust voltages, minimizing line crosstalk defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a data divider is used to reduce the number of data lines, then device complexity is reduced, but line crosstalk defects occur causing display quality deterioration
Solution Approach 1:
The data compensator performs preliminary compensation of data voltages before they are applied to the pixels. It calculates compensation values based on load differences between different data lines and periods, and adjusts the data voltages in advance to prevent line crosstalk defects from occurring in the first place
Solution Approach 2:
The system implements a feedback mechanism where the data compensator continuously monitors load differences between data lines and periods, calculates appropriate compensation values, and adjusts subsequent data voltages based on this information. This closed-loop approach dynamically corrects for line crosstalk effects
2Object-affected harmful factors
If data voltages are compensated based on load differences, then line crosstalk defects are minimized, but device complexity increases due to additional compensator circuitry
Solution Approach 1:
The data compensator is designed to perform multiple functions: it calculates load differences between data lines, determines compensation values based on these differences, and adjusts data voltages accordingly. By consolidating these functions into a single multi-functional block, the design avoids the need for separate circuits for each function
Solution Approach 2:
The compensation mechanism works by changing the voltage parameter of the data signals. The data compensator adjusts voltage levels dynamically based on calculated load differences, transforming the original data voltages into compensated voltages that account for line crosstalk effects
Data Source
AI summary
A display device includes: a data driver for providing data voltages to data output lines; a data divider for coupling the data output lines to data lines; and a data compensator for compensating data voltages based on a load difference between data voltages in adjacent pixel rows.