Multi-Wavelength Light Emitting Device for Volumetric Video
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Solution Overview
Problem
Current methods for generating live-action volumetric video face challenges in scalability and accuracy due to the need for multiple imaging devices and lighting devices with specific wavelengths, which complicates object detection and background identification, especially when dealing with subjects that change rapidly.
Innovation Solution
A light emitting device with a two-dimensional array configuration of unit regions, each containing multiple light emitters that emit different wavelengths, including near-infrared and visible light, allowing for precise control and high-speed switching of light patterns to improve accuracy and reduce system complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple lighting devices with different wavelengths are used to improve imaging accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple light sources emitting different wavelengths (first and second wavelengths) into a single lighting device. This merging approach maintains the ability to provide multi-wavelength illumination for improved imaging accuracy while reducing system complexity by eliminating the need for multiple separate lighting devices
Solution Approach 2:
The lighting device is designed to perform multiple functions by emitting light at different wavelengths simultaneously or alternately. The same device can adapt its emission characteristics based on the imaging requirements, providing both first-wavelength and second-wavelength illumination to enhance measurement precision across different scenarios
2Measurement precision
If multiple imaging devices are used to capture subjects from different viewpoints, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Instead of using multiple imaging devices with different spatial positions, the patent changes the wavelength parameter of the light source to achieve different imaging effects. By alternating between first-wavelength and second-wavelength emission, the system can capture different types of information (such as reflected light and fluorescent light) from the same viewpoint, maintaining measurement precision while reducing device complexity
3Measurement precision
If lighting devices are used for object detection, then measurement precision is improved, but object-generated harmful factors increase due to ambient light interference
Solution Approach 1:
The lighting device emits light in periodic cycles, alternating between first-wavelength and second-wavelength emission. This periodic action allows the imaging device to capture images at specific time points when only the desired wavelength is present, effectively separating the signal from ambient light interference and improving object detection accuracy
Solution Approach 2:
The lighting device performs preliminary illumination with specific wavelengths before the imaging device captures the image. By controlling the timing and sequence of wavelength emission, the system prepares the optical conditions in advance, ensuring that the imaging device receives light primarily from the controlled source rather than ambient light, thus reducing interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables highly accurate object detection and background identification with a simple configuration, reducing positional deviations even with rapidly moving subjects, and avoids the effects of ambient light, thus enhancing the generation of high-quality live-action volumetric videos.
Implementation Method 1
each of the unit regions includes a first light emitter and a second light emitter that emit lights having wavelengths different from each other in a near-infrared region
Data Source
AI summary
There is provided a light emitting device (10) including: a light emitting surface configured by arranging a plurality of unit regions (200) in a two-dimensional array, each of the unit regions including a plurality of light emitters (202, 204); and a control unit (400) that drives the light emitters individually. Each of the unit regions includes a first light emitter and a second light emitter that emit lights having wavelengths different from each other in a near-infrared region.