Multi-Emitter Light Source with Shared Optical Feedback
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Solution Overview
Problem
Existing light emitters with multiple light-emitting elements require multiple diffraction gratings and light-receiving elements, making them larger and less efficient in controlling the output of different wavelengths for achieving intended color tones.
Innovation Solution
A light emitter design featuring a substrate with a cladding and core structure, where multiple light-emitting elements and a single light-receiving element are integrated within an element sealing area, utilizing reflective surfaces and optical waveguides to receive and combine light, allowing for precise control of light intensity and color tone adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple diffraction gratings and light-receiving elements are used for each light-emitting element, then the control precision of light intensity is improved, but the device size increases
Solution Approach 1:
The patent combines multiple light-receiving functions into a single light-receiving element. The element sealing area serves as a common enclosure for multiple light-emitting elements and a single light-receiving element, allowing the light-receiving element to monitor and control the output of multiple light-emitting elements simultaneously. This merging approach maintains control precision while significantly reducing device size compared to having separate light-receiving elements for each light-emitting element.
Solution Approach 2:
The light-receiving element is designed with multi-functionality to perform multiple roles: it receives light from multiple different light-emitting elements, monitors their output, and enables control of their intensity. This universal light-receiving element replaces what would traditionally require multiple specialized light-receiving elements, achieving the same control precision with reduced device complexity and size.
2Area of stationary object
If multiple light-emitting elements are integrated with a single light-receiving element, then the device size is reduced, but the complexity of light path management increases
Solution Approach 1:
The element sealing area is segmented into distinct regions for different light-emitting elements while maintaining a shared light-receiving space. This segmentation allows each light-emitting element to have its own designated area within the sealing structure, making light path management easier despite the integrated design. The spatial segmentation reduces the complexity of managing multiple light paths within a compact form factor.
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 a compact and efficient light emitter that can precisely control the output of multiple light-emitting elements, achieving the desired color tone by using a single light-receiving element to monitor and adjust the light intensity, thus reducing size and increasing precision.
Implementation Method 1
a cladding on the first surface, a first core inside the cladding to receive light from the first light-emitting element, a second core inside the cladding to receive light from the second light-emitting element
Implementation Method 2
a light-receiving element inside the element sealing area. The light-receiving element includes a light-receiving surface to receive light from the first light-emitting element and the second light-emitting element
Data Source
AI summary
A light emitter includes a substrate including a first surface, a cladding on the first surface of the substrate, a core inside the cladding, a lid on the cladding, a first light-emitting element inside an element sealing area on the first surface, a second light-emitting element inside the element sealing area, and a light-receiving element inside the element sealing area.