Curved Display Gamma Correction via Regional Voltage Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Curved display apparatuses experience uneven brightness due to partial color shifts, where regions closer to the observation point appear darker than those at larger angles of view, despite receiving consistent control signals, leading to inconsistent hue observation.
Innovation Solution
A gamma correction method and apparatus that divides the curved display into regions, with a driving module generating distinct voltage commands for each region to adjust brightness, ensuring that regions closer to the observation point are not overpowered by those at larger angles, thereby maintaining uniform brightness across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a consistent control signal is given to the whole surface of the curved display apparatus, then the same hue should be observed in each region theoretically, but in reality partial color shift appears and regions closer to the observation point appear darker
Solution Approach 1:
The curved display surface is divided into multiple regions (first region, second region, third region) based on their angular positions relative to the observation point. Each region receives different voltage commands to compensate for the brightness non-uniformity caused by the curved geometry, thereby achieving consistent perceived brightness across the entire display surface.
Solution Approach 2:
Different voltage adjustment strategies are applied to different regions of the curved display. Specifically, when grayscale values are below a threshold, the first and third regions (at larger angles) receive smaller absolute voltage values while the second region (at smaller angles) receives larger absolute voltage values. This local differentiation compensates for the angular-dependent brightness variation.
2Manufacturing precision
If regional driving with different voltage commands is applied to compensate for brightness differences, then hue consistency is improved, but device complexity increases due to multiple voltage commands
Solution Approach 1:
The display surface is segmented into three regions, and the driving module generates corresponding voltage commands for each region. This segmentation enables precise control of brightness in each angular zone while maintaining a manageable level of complexity through systematic region classification.
Solution Approach 2:
The voltage command parameters are dynamically adjusted based on the grayscale value and regional characteristics. A threshold-based parameter change strategy is employed: when grayscale < threshold, different voltage magnitudes are applied to different regions; when grayscale >= threshold, uniform voltage is applied. This parameter adaptation achieves brightness uniformity without requiring complex continuous adjustment mechanisms.
Data Source
AI summary
Disclosed herein are a curved display apparatus and a gamma correction method thereof. The curved display apparatus includes first, second, and third regions and a driving module. The first and third regions are located respectively along two opposite edges of the curved display apparatus, while the second region is located between the first and third regions. A control signal instructs the curved display apparatus to display by a grayscale value. The driving module is configured to receive the control signal and thereby generate first, second, and third voltage commands for the three regions respectively, in order to drive the three regions. According to the disclosed gamma correction method, the absolute voltage values indicated by the first and third voltage commands is less than that by the second voltage command when the grayscale value is not greater than a threshold value.