Master-Slave Video Display Luminance Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-display video systems using multiple video display apparatuses often result in irregular luminance levels when combining images, causing viewer discomfort due to uneven brightness across the screen.
Innovation Solution
A master-slave video display system where projectors are connected in loop, with each projector adjusting its light source based on a common video setting value calculated from extracted video characteristic data to ensure uniform luminance across the screen, using a controller to synchronize and control the light sources of all connected projectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each video display apparatus independently controls its light source based on local video signals, then each display can operate autonomously, but luminance irregularities occur across the multi-display screen causing viewer discomfort
Solution Approach 1:
The patent merges the light source control functions of multiple video display apparatuses into a unified control system. The master apparatus collects video characteristic data from all slave apparatuses and calculates a common video setting value that is applied across all displays, ensuring luminance uniformity while maintaining coordinated autonomous operation.
Solution Approach 2:
The patent implements a feedback mechanism where each video display apparatus outputs its video characteristic data to the master apparatus, which then adjusts the light source control settings based on the aggregated information from all displays, creating a closed-loop control system that maintains luminance consistency.
2Illumination intensity
If a master-slave control system is implemented to synchronize light sources, then luminance uniformity is achieved, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The patent segments the control system into a master video display apparatus and multiple slave video display apparatuses. The master handles the complex tasks of data collection, calculation, and coordination, while slave apparatuses perform simpler local functions, distributing the system complexity across hierarchical levels.
Solution Approach 2:
The master video display apparatus acts as an intermediary between the video signals and the light source control of all displays. It receives video characteristic data from slaves, processes this information to generate common setting values, and coordinates light source control across the entire multi-display system.
Data Source
AI summary
A video display apparatus functions as a master which is to be connected in loop to other video display apparatus(s) functioning as slave(s) in order to configure a multi-display apparatus. The master video display apparatus includes an extracting unit configured to extract first characteristic data from a received video signal, a controller configured to generate a common video setting value and control a light source of an own apparatus based on the generated common video setting value, an input unit configured to input second characteristic data from the upstream apparatus, and a output unit configured to output the first characteristic data or the common video setting value to the downstream apparatus. The controller outputs the extracted first characteristic data to the downstream apparatus, calculates the common video setting value based on the input second characteristic data, and outputs the calculated common video setting value to the downstream apparatus.