Display Light Compensation for LED Zone Uniformity
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Solution Overview
Problem
Existing display systems, particularly those using LEDs, often operate outside specified luminance or chromaticity ranges due to manufacturing faults, aging, or improper installation, leading to suboptimal user experience.
Innovation Solution
A system comprising a computing device that captures images of a display, divides them into sub-areas, and adjusts LED zones based on illumination values to ensure uniformity and adherence to specified parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED zones are used to backlight the display, then the display can provide sufficient illumination, but non-uniform illumination and color variation occur across different regions
Solution Approach 1:
The display is divided into multiple zones corresponding to different LED zones. Each zone is independently analyzed and adjusted by comparing its illumination characteristics to a reference center zone, enabling localized compensation for non-uniform illumination across the display surface
Solution Approach 2:
Different regions of the display are treated differently through zone-specific illumination adjustments. Each zone receives customized compensation based on its measured illumination values, achieving local optimization of uniformity while maintaining overall display brightness
2Duration of action of stationary object
If the display operates over time, then it provides continuous information to users, but LED output varies due to aging and thermal effects
Solution Approach 1:
The system captures images of the display at different times and conditions, measures illumination values in various zones, and uses this feedback to detect drift from reference values. This enables continuous monitoring and detection of LED aging and thermal effects throughout the display's operational life
Solution Approach 2:
Reference illumination values are established during initial display operation when LED performance is known. These reference values serve as a baseline for future comparisons, allowing the system to detect and compensate for aging effects before they significantly degrade user experience
3Adaptability or versatility
If the display is actuated based on ambient light conditions, then it adapts to different environments, but local non-uniformities become more noticeable
Solution Approach 1:
The display is divided into multiple zones that are independently adjusted for illumination uniformity. This segmentation allows local non-uniformities to be corrected through zone-specific compensation while the overall display maintains environmental adaptability through global brightness adjustments
Data Source
AI summary
A computing device may determine a first illumination value based on a first sub-area of an image of a display. The display may include LED zones. The first sub-area may be centered on the image. The computer may define a plurality of second sub-areas of the image based on the LED zones, determine second illumination values of the second sub-areas, compare the second illumination values to a value range, the value range being defined by at least one of an addition and a subtraction of the first illumination value and a threshold value, and actuate the display based on comparing the second illumination values to the value range.