Distributed Light Source Position-Based Illumination Control
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Solution Overview
Problem
Distributed LED light sources require high bandwidth for communication to display moving images, which is challenging due to the need for frequent updates of illumination characteristics across multiple light sources spaced over large distances, often limited by low-bandwidth network communication and battery power constraints.
Innovation Solution
Each light source in the distributed system stores and generates illumination based on position information within the image coordinate system, reducing the need for high-bandwidth transmission by only transmitting position information instead of full illumination set points, allowing for dynamic image generation even with limited bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high bandwidth transmission is used to communicate illumination set points to all light sources, then dynamic image display performance is improved, but network infrastructure complexity and power consumption increase
Solution Approach 1:
The patent segments the image data into two parts: the complete image is transmitted once to all light sources, then each light source determines its position in the image and only transmits position information. This segmentation separates the bulk data transmission from the control data transmission, significantly reducing ongoing communication requirements.
Solution Approach 2:
The patent applies preliminary action by transmitting the complete image to all light sources before the actual display operation. Each light source stores the image and uses it later with position information to determine illumination characteristics, eliminating the need for continuous high-bandwidth transmission during display.
2Productivity
If high bandwidth transmission is used to update illumination characteristics frequently, then image smoothness and dynamic performance are improved, but available power for battery-operated light sources is reduced
Solution Approach 1:
The patent segments communication into an initial bulk transmission of the complete image followed by minimal position information exchanges. This separates the energy-intensive complete data transfer from ongoing low-energy position updates, significantly reducing total power consumption while maintaining display dynamics.
Solution Approach 2:
The complete image is transmitted and stored in advance before display operation. This preliminary action eliminates the need for continuous high-bandwidth transmission during the display period, reducing ongoing power consumption while maintaining the ability to display dynamic images through position-based updates.
3Area of stationary object
If light sources are spaced over large distances to cover large areas, then display area is improved, but communication bandwidth requirements increase due to longer transmission distances
Solution Approach 1:
The patent segments the communication protocol into two stages: initial complete image transmission to all distributed light sources, followed by position information transmission. This segmentation allows large-area displays with many light sources while reducing ongoing bandwidth requirements through the position-only update mechanism.
Solution Approach 2:
The complete image is transmitted and cached in advance to all light sources before display operation. This preliminary data distribution enables large-area displays without requiring continuous high-bandwidth communication during the display period, as light sources use stored image data combined with position information to generate output.
Data Source
AI summary
A method of operating a distributed light source and a distributed light source are disclosed. The distributed light source comprising a plurality of light sources to display an image, the method comprising the steps of:transmitting the image to be displayed to the plurality of light sources, the image being described in an image coordinate system;providing to each of the light sources information indicative of a position of the light source in the image;determining, by each of the light sources, an illumination set point for the light source, based on the position information and the transmitted image, andcontrolling the plurality of light sources to generate an illumination in accordance with the respective plurality of illumination set points, thereby displaying the image.