Rotatable LED Optical Element Housing for Tool-less Light Distribution Adjustment
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Solution Overview
Problem
Existing LED luminaires with non rotationally-symmetrical optical elements require tools and expert personnel for rotational adjustment, limiting post-manufacturing and post-installation flexibility in luminous distribution patterns and complicating luminaire design.
Innovation Solution
A rotatably adjustable apparatus with a bezel and ring mechanism, allowing for tool-less, multi-click or smooth rotational adjustment of non rotationally-symmetrical optical elements, featuring a detent mechanism for retaining selected positions and graphic indicators for accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rotational adjustment mechanism is added to allow post-manufacturing adjustment of optical elements, then adaptability and versatility of luminaire are improved, but device complexity increases
Solution Approach 1:
The optical element is nested within a rotatable housing that contains the adjustment mechanism. The housing itself can rotate relative to the luminaire body, allowing the optical element to be repositioned without external tools. This nested structure integrates multiple functions (adjustment, retention, indication) into a compact unit, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The system transitions from a static, fixed optical element to a dynamic, adjustable configuration. The rotatable housing with detent mechanism allows the optical element to be repositioned between multiple fixed angular positions, providing adaptability while maintaining structural integrity and thermal management characteristics through controlled rotational movement.
2Ease of operation
If tool-less adjustment mechanism is implemented, then ease of operation is improved, but reliability of position retention may worsen
Solution Approach 1:
The adjustment mechanism is designed to be self-servicing through the detent system. When the housing is rotated to a desired position, the detent mechanism automatically engages with the gear feature to lock the position without requiring tools or additional operations. The spring-loaded detent provides automatic position retention, ensuring reliability while maintaining ease of operation.
3Manufacturing precision
If multiple dedicated non-adjustable components are used to achieve different light distribution patterns, then manufacturing precision is improved, but device complexity and quantity of components increase
Solution Approach 1:
A single optical element housed in a rotatable housing performs multiple functions that would otherwise require multiple dedicated components. By rotating the housing to different angular positions, the same optical element can produce various light distribution patterns, eliminating the need for multiple fixed optical elements and reducing overall device complexity while maintaining manufacturing precision.
4Adaptability or versatility
If rotational adjustment of optical elements is added, then adaptability of luminous distribution is improved, but thermal management may be impacted
Solution Approach 1:
The system allows dynamic adjustment of light direction through rotation while maintaining the rigid thermal connection between the LED emitter and heat sink. The optical element and its housing can rotate without affecting the thermal path, as the rotation occurs at the optical assembly level rather than at the LED mounting level, preserving thermal management performance while achieving adaptability.
Data Source
AI summary
A method and apparatus is provided that enables the rotational adjustment of a non rotationally-symmetrical optical element in order to change the direction of the emitted light from an LED emitter of a lighting unit or to change the overall luminous distribution pattern in a luminaire including a plurality of LED emitters and optical elements. The apparatus enables simple and accurate rotational adjustment, while providing for the retaining of the selected rotational position of the optical element. The adjustment can be made before or after the installation of the lighting unit or luminaire, and can be accomplished without requiring tools and expert personnel.