UV LED Lens Convex Shape for Type Identification
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Solution Overview
Problem
Existing UV light illuminating devices using LEDs face challenges in identifying the type of LEDs beneath lenses and recognizing directionality without increasing substrate size, as conventional methods require dedicated space for marks or cutouts.
Innovation Solution
Incorporating lenses with convex parts protruding along the optical axis as identification marks, allowing the type of LED to be identified and directionality to be recognized through shape differences, without the need for substrate marks or cutouts, while maintaining efficient light emission characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of LEDs are provided on the substrate with lenses attached, then light emission functionality is improved, but identification of LED types becomes impossible
Solution Approach 1:
The patent creates a visual copy or representation of the LED type information through the lens shape. Different LED types (different wavelengths) are represented by different lens shapes (spherical, ellipsoidal, flat), allowing identification without directly observing the LED itself. This copying mechanism resolves the identification problem while maintaining multiple LED types on the substrate.
2Ease of operation
If direction identification marks are formed on the substrate, then directionality recognition is improved, but substrate size increases
Solution Approach 1:
The lens serves multiple functions: it corrects the emission pattern of the LED and simultaneously acts as a direction identification mark. By making the lens shape asymmetric (ellipsoidal vs spherical), the lens itself indicates the correct orientation (upstream/downstream position) without requiring additional marks on the substrate, thus avoiding area increase.
Solution Approach 2:
The patent merges the optical function (light emission correction) and the identification function (direction marking) into a single component - the lens. This consolidation eliminates the need for separate direction marks on the substrate, maintaining compact substrate size while providing clear directional guidance for assembly.
3Ease of operation
If cutouts are installed on the substrate for direction identification, then directionality recognition is improved, but device complexity increases
Solution Approach 1:
The lens is designed to perform dual functions: optical correction and directional identification. By encoding direction information in the lens shape itself (spherical for one direction, ellipsoidal for another), the system eliminates the need for separate cutouts or marks on the substrate, thereby reducing structural complexity while maintaining ease of assembly.
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 accurate identification of LED types and recognition of directionality without increasing device size, ensuring correct assembly and maintaining high UV light emission efficiency.
Implementation Method 1
a lens placed on an optical path of the LED element
Implementation Method 2
a light emitting diode (LED) element placed on the substrate
Data Source
AI summary
A light emitting device includes a substrate, a LED element placed on the substrate, and a lens placed on an optical path of the LED element, wherein the lens has a convex part protruding in a direction of an optical axis of the lens in a central part of an exit surface of the lens.