Video Wall Control Device Backlight Luminance Adjustment
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Solution Overview
Problem
Video wall devices experience color deviation among display panels due to differences in luminance and chromaticity characteristics, which worsen over time, and existing calibration methods are inefficient for large format displays.
Innovation Solution
A video wall control device and method that adjusts the luminance of display panels by controlling the backlight units based on image data captured by an imaging device, determining a backlight control signal to equalize luminance across panels and transmitting it to the video wall system, allowing for automatic luminance adjustment and minimizing color deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional calibration methods are used to adjust luminance among display panels, then color deviation can be minimized, but the calibration process is time-consuming and complex for large format displays
Solution Approach 1:
The patent changes the control parameter from direct panel luminance adjustment to backlight unit intensity control. By adjusting the intensity parameters of individual backlight units based on captured image data, the system achieves luminance uniformity across display panels more efficiently, reducing calibration time while maintaining precision.
Solution Approach 2:
The patent replaces manual or mechanical calibration processes with an automated optical measurement system. An imaging device captures image data of the video wall, and a processor automatically analyzes luminance distribution and generates backlight control signals, substituting time-consuming manual calibration with rapid automated optical measurement and computation.
2Manufacturing precision
If manual luminance adjustment is performed on each display panel, then color deviation can be corrected, but the process becomes increasingly complex as the number of display panels increases
Solution Approach 1:
The patent creates a universal calibration system that handles multiple display panels simultaneously through a single integrated process. The imaging device captures data from the entire video wall, the processor analyzes luminance across all panels, and backlight control signals are generated for multiple panels in one operation, making the system scalable regardless of panel quantity.
Solution Approach 2:
The patent introduces an imaging device as an intermediary that objectively measures luminance distribution across the video wall. This intermediary provides quantitative image data that the processor uses to generate precise backlight control signals, replacing subjective manual adjustment and simplifying the calibration process for complex multi-panel configurations.
3Manufacturing precision
If backlight unit intensity is adjusted based on captured image data, then luminance can be equalized across display panels, but additional control circuitry is required
Solution Approach 1:
The patent segments the backlight control into individual controllable units, where each backlight unit can be independently adjusted based on its corresponding display panel's luminance requirements. This segmentation allows precise luminance equalization across panels while using existing backlight unit control capabilities, minimizing additional hardware complexity.
Data Source
AI summary
A video wall control device is provided in which a data processor is configured to determine a backlight control signal controlling an intensity of light supplied by at least one backlight unit among a plurality of backlight units based on image data obtained by capturing an image of a video wall device including a plurality of display panels and the plurality of backlight units supplying the light to each of the plurality of display panels, and signal transmission and reception circuitry configured to transmit the backlight control signal to the video wall device.