AMOLED Luminance Compensation for Ultra-Low DBV Grayscale
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image display luminance compensation algorithms for active-matrix organic light-emitting diode (AMOLED) screens are inadequate in compensating low grayscale luminance in ultra-low brightness value (DBV) modes, leading to uneven display luminance and color cast issues.
Innovation Solution
An image display luminance compensation method that determines a target dimming interval and index value for grayscale images, performs luminance compensation based on set compensation data of grayscale binding points, and applies interval compression to adjust grayscales, improving luminance compensation in ultra-low DBV modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing image display luminance compensation algorithm is used, then normal mode display luminance is compensated, but ultra-low DBV mode low grayscale luminance compensation effect is poor
Solution Approach 1:
The patent segments the luminance compensation process by dividing dimming intervals into multiple ranges (first dimming interval, second dimming interval, third dimming interval) with different thresholds. Each range has its own compensation strategy, allowing the system to adapt to different brightness modes including ultra-low DBV mode, thereby resolving the contradiction between compensation precision and mode adaptability.
2Manufacturing precision
If luminance compensation is performed on all grayscale values, then compensation coverage is improved, but color cast issues occur in ultra-low DBV mode
Solution Approach 1:
The patent applies local quality by setting different luminance compensation protection thresholds for different dimming intervals. Specifically, it introduces a third dimming interval with a third threshold for ultra-low DBV mode, applying compensation only to grayscale values above this threshold. This localized approach prevents color cast in ultra-low brightness regions while maintaining compensation precision in other regions.
3Object-generated harmful factors
If luminance compensation protection threshold is increased, then color cast is reduced, but uneven display luminance persists in low grayscale regions
Solution Approach 1:
The patent employs dynamics by making the compensation threshold adaptive rather than fixed. It dynamically adjusts thresholds based on dimming intervals: first threshold for normal mode, second threshold for low brightness mode, and third threshold for ultra-low DBV mode. This dynamic threshold adjustment allows the system to maintain luminance uniformity in low grayscale regions while preventing color cast in ultra-low brightness regions.
Data Source
AI summary
An image display luminance compensation method includes: obtaining luminance data of a captured grayscale image; determining a target dimming interval in which a display grayscale of the grayscale image is located from a plurality of dimming intervals of a display screen, and determining an index value of the display grayscale in the target dimming interval; determining whether a luminance compensation is performed on the grayscale image according to the index value; obtaining set compensation data of a plurality of grayscale binding points when it is determined that the luminance compensation is performed on the grayscale image; and performing the luminance compensation on the luminance data of the grayscale image according to the set compensation data of the plurality of grayscale binding points.