Display Panel Driving Method Using Non-Linear Curve Fitting for De-Mura Data
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Solution Overview
Problem
Conventional compression/decompression operations in display panel de-Mura techniques suffer from data distortion and security issues due to their linear nature, which can lead to compromised de-Mura effects and data leakage.
Innovation Solution
A method for driving a display panel that involves obtaining a standard driving voltage value and determining a corresponding compensation curve parameter from compressed de-Mura data, using position information to calculate an effective driving voltage value, and fitting compensation parameters to improve decompression accuracy, thereby reducing data distortion and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If linear compression/decompression process is used for de-Mura data, then the compression process is simple, but data distortion occurs and de-Mura effect is ruined
Solution Approach 1:
The patent changes the compression model from linear to non-linear by introducing curve fitting parameters (a, b, c) that describe the actual variance trend of compensation parameters. This allows the compressed data to capture the true non-linear relationship between pixel positions and compensation values, eliminating data distortion while maintaining compression efficiency.
Solution Approach 2:
The patent applies curvature by using quadratic curve fitting (y = ax² + bx + c) to model the compensation parameter variance trend. This curved model better represents the actual non-linear distribution of Mura defects across the display panel, improving decompression accuracy compared to straight-line linear compression.
2Device complexity
If linear compression/decompression process is used for de-Mura data, then the compression algorithm is simple, but the encryption level is low and de-Mura technique might be leaked
Solution Approach 1:
The patent enhances security by transforming the compression approach from simple linear operations to a more complex non-linear curve fitting model with multiple parameters (a, b, c). This increases the encryption level and makes it more difficult to reverse-engineer the de-Mura technique, while the algorithm remains computationally efficient.
3Productivity
If linear compression/decompression process is used for de-Mura data, then the processing speed is fast, but data distortion occurs
Solution Approach 1:
The patent achieves both high processing speed and high accuracy by using a quadratic curve model with only three parameters (a, b, c). This compact representation allows for rapid compression and decompression operations while accurately capturing the non-linear variance trend, avoiding the data distortion inherent in linear methods.
Data Source
AI summary
A display panel driving method, a display device and a driving device are provided. The method obtains a standard driving voltage value of a target pixel when a subject display content is being displayed and a target compression unit corresponding to the target pixel, determines a target compensation curve parameter from compressed de-Mura data corresponding to the target compression unit according to the standard driving voltage value, determines an effective driving voltage value of the target pixel when the subject content is being displayed according to a position information where the target pixel is in the target compression unit and the target compensation curve parameter, and drives the display panel according to the effective driving voltage. This method could correctly identify the corresponding decompression data and thus the decompressed data could be close to the actual data. This raises the decompression accuracy of decompressing the de-Mura data.