Light Emitting Device Protrusion Mirror Miniaturization
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Solution Overview
Problem
Existing light emitting devices with semiconductor laser elements are not miniaturized effectively due to the need for separate mirrors for each element, which increases size and complexity.
Innovation Solution
A light emitting device design featuring a single protrusion acting as a mirror on the cover portion, allowing light from multiple semiconductor laser elements to be reflected and transmitted through a glass material, maintaining polarization and improving optical reflectance, while minimizing device height and allowing for symmetrical optical paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mirrors are provided for each semiconductor laser element, then light reflection efficiency is improved, but device size and structural complexity increase
Solution Approach 1:
Multiple separate mirrors for individual semiconductor laser elements are merged into a single shared mirror structure. The cover portion serves as a common reflective element for all laser elements, reducing the number of optical components while maintaining light reflection efficiency. This consolidation directly reduces structural complexity and enables device miniaturization.
Solution Approach 2:
The cover portion is designed to serve multiple functions simultaneously: it acts as a protective cover, a structural support element, and a shared mirror for light reflection. By making the cover portion multi-functional, the patent eliminates the need for separate mirrors while preserving optical performance, thereby reducing device complexity without sacrificing reflection efficiency.
2Reliability
If multiple separate mirrors are used for each laser element, then optical performance is maintained, but device height increases
Solution Approach 1:
The patent combines the mirror function into the cover portion itself, eliminating the need for separate mirror components that would increase device height. The integrated design maintains optical performance while reducing the vertical dimension of the device.
Solution Approach 2:
The mirror function is transitioned from a separate component in the vertical dimension to an integrated feature of the cover portion. By embedding the reflective surface in the cover portion, the patent maintains optical performance while minimizing the height requirement.
3Volume of moving object
If a single protrusion is used as a shared mirror, then device size is reduced, but light path complexity increases
Solution Approach 1:
The patent merges multiple optical functions into a single protrusion structure on the cover portion. This shared mirror serves all laser elements simultaneously, reducing device size while the unified design actually simplifies the overall optical path management compared to multiple separate mirrors.
Solution Approach 2:
The protrusion is designed as a universal optical element that handles light reflection for all semiconductor laser elements. This multi-functional design reduces device size while maintaining manageable optical path complexity through standardized light reflection geometry.
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
The design enables miniaturization of the light emitting device, reduces light spread, and facilitates unified optical paths for multiple semiconductor laser elements, improving optical efficiency and maintaining polarization characteristics.
Implementation Method 1
Light emitted from each of the plurality of semiconductor laser elements is incident on a lateral surface of the protrusion, passes through in the protrusion, is reflected at the boundary surface of the protrusion
Implementation Method 2
passes through in the protrusion, and is transmitted through the cover portion
Data Source
AI summary
A light emitting device includes: a base portion comprising: an upward-facing surface, and a frame defining an inner lateral surface; a plurality of semiconductor laser elements arranged on the upward-facing surface and surrounded by the frame; a cover portion supported by the frame and disposed above the plurality of semiconductor laser elements; and a protrusion extending from a lower surface of the cover portion toward the upward-facing surface. Light emitted from each of the plurality of semiconductor laser elements is incident on a lateral surface of the protrusion, passes through the protrusion, is reflected at the boundary surface, and is transmitted through the cover portion.