Light-Emitting Fan Hub With Guiding Protrusions for Uniform Illumination
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Solution Overview
Problem
Conventional light-emitting fans face challenges in uniformly projecting light from light-emitting diodes onto the hub or decorative board due to focused light emission, which can increase the fan's size when attempting to address this issue, making it unsuitable for thin electronic devices.
Innovation Solution
The design incorporates a light guiding hub with integrally formed protrusions on the impeller, allowing light to be uniformly distributed onto a decorative plate by positioning light-emitting components relative to these protrusions, enhancing light guidance and reducing installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the distance between the light-emitting diode and the hub or decorative board is increased to achieve uniform light projection, then the light uniformity is improved, but the overall size of the fan is increased
Solution Approach 1:
The patent introduces a light guiding hub as an intermediary component between the light-emitting diode and the decorative board. This light guiding hub includes light guiding protrusions that redirect and distribute light uniformly across the decorative board surface, achieving uniform illumination without increasing the distance between the LED and the board, thus maintaining compact fan dimensions.
2Device complexity
If a conventional light-emitting diode is used directly on the hub, then the structure is simple, but the light projection is focused and non-uniform
Solution Approach 1:
The light guiding hub features localized light guiding protrusions at specific positions and angles. These protrusions create local light redirection zones that collectively achieve uniform overall illumination. The asymmetric angular arrangement of the protrusions (e.g., 45 degrees, 135 degrees, 225 degrees, 315 degrees) optimizes light distribution to different regions of the decorative board, transforming focused LED light into uniform illumination while maintaining structural simplicity.
3Illumination intensity
If multiple light-emitting components are added to achieve uniform illumination, then the light uniformity is improved, but the device complexity increases
Solution Approach 1:
The light guiding hub performs the self-service function of light redistribution using its geometric structure. The light guiding protrusions passively redirect incident light from a single LED source to achieve uniform illumination across the decorative board, eliminating the need for multiple active light-emitting components. This structural self-service approach maintains device simplicity while achieving the desired light uniformity.
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 solution enables uniform light emission from the light-emitting fan while maintaining a compact size, suitable for thin electronic devices, by effectively guiding light through the protrusions on the light guiding hub, improving both light distribution and installation ease.
Implementation Method 1
Light generated by the at least one first light-emitting component is emitted from the outer top surface through the at least one light guiding protrusion of the light guiding hub
Implementation Method 2
Light generated by the at least one first light-emitting component is emitted from the outer top surface through the at least one light guiding protrusion of the light guiding hub
Data Source
AI summary
A light-emitting fan includes a fan frame, an impeller, a circuit board and a light-emitting component. The impeller includes a light guiding hub and a plurality of blades. The light guiding hub is disposed on the fan frame. The light guiding hub has an outer top surface, an outer annular surface, an inner annular surface, and a recess. The outer annular surface is connected to the outer top surface, the inner annular surface faces away from the outer annular surface. The blades are connected to the outer annular surface. The recess is located at the inner annular surface so as to form a light guiding protrusion of the light guiding hub. The circuit board is disposed on the fan frame. The light-emitting component is disposed on the circuit board. Light generated by the light-emitting component is emitted from the outer top surface through the light guiding protrusion.