Gamma Correction for AMOLED Displays with Mixed Pixel Densities
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Solution Overview
Problem
The existing AMOLED display modules with varying pixel densities face challenges in achieving consistent luminance and chrominance across different pixel regions after gamma correction, requiring additional devices and new chips, which increase production costs and development time.
Innovation Solution
A gamma correction method that compensates gamma correction data using remapping parameters to adjust the display characteristics of low-density and high-density pixel regions to a consistent state without the need for additional devices or new chips, by controlling the display of test pictures and determining remapping parameters based on current luminance and preset pixel grayscales.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gamma correction is carried out only for the high-density pixel region (H area), then the high-density region achieves proper luminance and chrominance, but the low-density pixel region (L area) cannot achieve the effect of the high-density region
Solution Approach 1:
The display panel is divided into two display areas with different pixel densities (first display area with lower pixel density and second display area with higher pixel density). The method applies different gamma correction approaches to each area: the first area undergoes standard gamma correction, while the second area uses remapping parameter compensation based on luminance comparison, avoiding the need for separate correction devices for each region.
Solution Approach 2:
The patent applies localized gamma correction strategies tailored to each display area's characteristics. The first display area receives standard gamma correction data, while the second display area receives compensated gamma correction data generated through remapping parameters. This local differentiation ensures each area achieves proper luminance and chrominance without requiring a single complex universal correction device.
2Manufacturing precision
If a gamma correction device is added to tune both H area and L area, then consistent gamma characteristics are achieved, but the production cost of the panel factory greatly increases
Solution Approach 1:
The system uses the already-acquired gamma correction data from the first display area as a reference to generate correction data for the second display area. By comparing luminance values and calculating remapping parameters, the method enables the display panel to self-correct its own gamma characteristics across different pixel density regions without requiring external correction devices, thereby reducing production costs.
Solution Approach 2:
The patent changes the gamma correction parameters dynamically based on the pixel density of different display areas. By calculating remapping parameters from luminance comparisons and applying them to compensate the gamma correction data, the system adapts the correction parameters to match the specific characteristics of each display area, achieving consistent gamma characteristics without additional hardware.
3Adaptability or versatility
If a new chip is developed to configure and adjust high pixel and low pixel gamma registers, then simultaneous displaying in H area and L area is achieved, but the development time is long and verification is delayed
Solution Approach 1:
The patent makes the existing display chip multi-functional by enabling it to handle gamma correction for both first and second display areas with different pixel densities. The chip uses the same gamma correction data acquisition process and applies remapping parameter compensation to serve multiple regions, eliminating the need for separate chips for different pixel density regions and reducing development time.
Solution Approach 2:
The method performs preliminary gamma correction on the first display area to acquire correction data, which then serves as the basis for generating correction data for the second display area through remapping parameter calculation. This preliminary action eliminates the need for separate chip development and verification for different regions, as the same chip can be configured to perform both corrections sequentially.
Data Source
AI summary
A gamma correction method and apparatus, electronic device and readable storage medium. The method comprises: controlling a first display area (21) to display a test picture (S11); performing gamma correction on first display area to obtain first gamma correction data (S12); according to first gamma correction data, controlling a second display area (22) to display the test picture (S13); acquiring current display brightness corresponding to the test picture displayed in second display area (S14); when current display brightness is the same as that corresponding to a preset pixel grayscale displayed in first display area, determining remapping parameters of second display area according to grayscale brightness corresponding to second display area when current display brightness is displayed and preset pixel grayscale (S15); according to remapping parameters, compensating first gamma correction data to obtain second gamma correction data (S16); according to second gamma correction data, controlling second display area to display (S17).