Pixel Circuit Compensation Using Linear Function Conversion
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Solution Overview
Problem
Existing pixel circuit compensation methods require excessive storage resources due to the need for large amounts of compensation data, which also leads to higher error rates compared to linear functions.
Innovation Solution
A compensation method for pixel circuits that involves obtaining a nonlinear function representing the relationship between voltage transmission loss ratio and data signal voltage, converting this nonlinear function into a corresponding linear function, and using the linear function to calculate a compensated first gate-source voltage difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If nonlinear functions are used for pixel circuit compensation, then compensation accuracy is improved, but storage resource consumption increases
Solution Approach 1:
The patent transforms the compensation function from a nonlinear relationship to a linear relationship by changing the parameter representation. Instead of storing and processing nonlinear function parameters that require extensive data, the system uses linear function parameters (slope and intercept) that can be represented with fewer bits, thereby reducing storage resource consumption while maintaining compensation accuracy
Solution Approach 2:
The patent applies different linearization strategies to different regions of the compensation data. By performing linear fitting on specific segments of the nonlinear compensation curve and storing only the linear parameters for each segment, the system achieves accurate local compensation with reduced storage requirements compared to storing the entire nonlinear function
2Adaptability or versatility
If more compensation data is stored, then compensation coverage is improved, but storage resource consumption increases
Solution Approach 1:
The patent changes the parameter representation from storing complete compensation lookup tables to storing linear function parameters (slope and intercept). This parameter transformation allows the system to achieve comprehensive compensation coverage through mathematical calculation rather than exhaustive data storage, significantly reducing the quantity of stored data
Solution Approach 2:
Instead of storing actual compensation values for all possible input conditions, the patent stores simplified linear function parameters that can generate the compensation values on-demand. This copying approach replaces extensive data storage with compact parameter storage that can be computationally expanded to cover all compensation scenarios
Data Source
AI summary
This application discloses a compensation method for a pixel circuit and a display panel. The compensation method firstly obtains the nonlinear function of the pixel circuit, then converts the nonlinear function into a corresponding linear function, and then obtains the compensated first gate-source voltage difference according to the linear function and the second gate-source voltage difference. Since the nonlinear function requires more compensation data and has a larger error than the linear function, using the converted linear function for compensation can reduce the required storage resources and improve the accuracy of compensation.