Dual Light-Emitting Array Layout for Narrow 3D Irradiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light-emitting devices for three-dimensional shape measurement and proximity detection face challenges in achieving a narrow irradiation area with desired light density while preventing temperature rise and maintaining high light output, especially when the intervals between light-emitting elements differ between proximity detection and three-dimensional measurement arrays.
Innovation Solution
A light-emitting device configuration with a first light-emitting element array for proximity detection and a second light-emitting element array for three-dimensional measurement, where the second array has a wider interval and higher light output, and is driven independently, along with a light diffusion member to manage light distribution and temperature, allowing for reduced irradiation area and temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the interval between light-emitting elements is reduced to achieve a narrow irradiation area, then the irradiation area is reduced, but the temperature rise of the light-emitting element increases
Solution Approach 1:
The invention divides the light-emitting elements into two separate arrays: a first light-emitting element array for proximity detection and a second light-emitting element array for three-dimensional shape measurement. This segmentation allows each array to have optimized intervals suitable for its specific function, with the second array having a wider interval to reduce temperature rise while still achieving the desired irradiation area through the light diffusion member.
Solution Approach 2:
A light diffusion member is introduced as an intermediary component between the second light-emitting element array and the object to be measured. This light diffusion member diffuses the light from the second array, enabling a wider interval between elements while maintaining the necessary irradiation area and light density on the object surface, thereby reducing temperature rise without compromising measurement capability.
2Illumination intensity
If the light output is increased to achieve high light density on the irradiation surface, then the light density is improved, but the temperature rise of the light-emitting element increases
Solution Approach 1:
The invention separates the functions of proximity detection and three-dimensional shape measurement into different light-emitting element arrays with different light output requirements. The second light-emitting element array is specifically designed with higher light output capability to provide sufficient light density for shape measurement, while its wider element interval helps manage the temperature rise associated with high power operation.
Solution Approach 2:
The light diffusion member acts as an intermediary that distributes the high light output from the second light-emitting element array across the irradiation area. This diffusion process maintains the necessary light density on the object surface while allowing the elements to be spaced further apart, which helps dissipate heat and reduce temperature rise.
3Temperature
If the interval between light-emitting elements is increased to reduce temperature rise, then the temperature control is improved, but the irradiation area becomes too large
Solution Approach 1:
The light diffusion member serves as a critical intermediary that enables the second light-emitting element array to operate with a wider element interval for temperature control while still achieving the desired narrow irradiation area. The diffusion member concentrates and directs the light from the spaced-apart elements onto a focused area on the object surface, effectively decoupling the element spacing from the irradiation area size.
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
This configuration enables efficient light distribution with a narrow irradiation area and effective temperature management, ensuring high light output for three-dimensional shape measurement while maintaining power efficiency and preventing overheating.
Implementation Method 1
a light diffusion member provided on an emission path of the second light-emitting element array
Data Source
AI summary
A light-emitting device includes: a first light-emitting element array that includes plural first light-emitting elements arranged at a first interval; a second light-emitting element array that includes plural second light-emitting elements arranged at a second interval wider than the first interval, second light-emitting element array being configured to output a light output larger than a light output of the first light-emitting element array, and being configured to be driven independently from the first light-emitting element array; and a light diffusion member provided on an emission path of the second light-emitting element array.