AMOLED Display Compensation Module for Gray-Scale Transition
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Solution Overview
Problem
In AMOLED display products, switching from low to high display gray-scale causes significant color and luminance deviations due to differences in red, green, and blue sub-pixel luminance, leading to display failures, especially during continuous transitions like sliding mobile phone interfaces.
Innovation Solution
A display compensation module comprising a search circuit, compensation control circuit, and compensation circuit that compares gray-scale values between frames, applies control signals for necessary gray-scale compensation, and uses a preset compensation gray-scale search table to adjust sub-pixel luminance, ensuring consistent color and luminance across transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If gray-scale switching is implemented in AMOLED display, then display brightness and contrast are improved, but color and luminance deviation occurs due to material differences between red, green, and blue sub-pixels
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation values in a lookup table before actual display operation. The compensation table is generated in advance based on the differences between red, green, and blue sub-pixel materials, so that when gray-scale switching occurs during normal display, the appropriate compensation values are immediately retrieved and applied without real-time calculation delays, thus maintaining color and luminance consistency while enabling high brightness display.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the gray-scale values of different sub-pixels based on their material characteristics. The compensation mechanism modifies the luminance parameters of red, green, and blue sub-pixels individually according to their specific emission characteristics, transforming the raw gray-scale values into compensated values that ensure uniform color and luminance across all sub-pixel types during gray-scale transitions.
2Speed
If continuous gray-scale switching is performed during sliding interface, then display responsiveness is improved, but significant color and luminance deviation accumulates causing display failure
Solution Approach 1:
The patent applies feedback by implementing a real-time compensation mechanism that continuously monitors and adjusts gray-scale values during dynamic interface transitions. The compensation circuit receives the original gray-scale values, retrieves appropriate compensation data from the lookup table based on the current display state, and outputs corrected gray-scale values that maintain color and luminance consistency throughout continuous sliding operations, preventing accumulation of display deviations.
3Device complexity
If no gray-scale compensation is applied, then device complexity is reduced, but color and luminance deviation occurs during gray-scale transition
Solution Approach 1:
The patent applies copying by using a lookup table that stores pre-calculated compensation values for different gray-scale levels and sub-pixel types. Instead of implementing complex real-time calculation algorithms, the system copies and retrieves pre-computed compensation data from the table, significantly reducing the complexity of the compensation circuit while maintaining accurate color and luminance consistency across all gray-scale transitions.
Data Source
AI summary
A display compensation module, a display compensation method and a display device are provided. The display compensation module includes a search circuit, a compensation control circuit and a compensation circuit. The search circuit is configured to obtain compensation information corresponding to the display gray-scale value of the M-th row in the N-th frame of display data and the display gray-scale value of the M-th row in the (N−1)-th frame of display data, and when the compensation information indicates that the display gray-scale values of at least part of columns of sub-pixels in the M-th row in the display panel increase from the (N−1)-th frame to the N-th frame, apply the first control signal to the compensation control circuit; N is an integer greater than 1, M is a positive integer. The compensation control circuit is configured to: determine whether to perform a gray-scale compensation according to the display gray-scale value of the M-th row in the N-th frame of display data after receiving a first control signal. The compensation circuit is configured to compensate the display gray-scale value of the M-th row in the N-th frame of display data after receiving the compensation control signal.