Rechargeable Glowstick Polymer Rod Light Diffusion
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Solution Overview
Problem
Concentrated light sources can be blinding in low light conditions and may not be noticeable to individuals at a lower level, necessitating a mechanism to diffuse light for broader area illumination.
Innovation Solution
A glowstick design incorporating a polymer rod aligned with the primary emission direction of a light source, secured via a collet and collar mechanism, which provides an interference fit to ensure the light source is proximate to the polymer rod, allowing for efficient light diffusion and alignment, and includes a rechargeable battery with accessible charging ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a concentrated light source is used, then visibility at a distance is improved, but blinding effects and poor noticeability to individuals at lower levels occur
Solution Approach 1:
The light source is segmented into multiple LED elements arranged in a linear array within the polymer rod, transforming a single concentrated point source into multiple distributed sources that cover a larger area and reduce intensity concentration
Solution Approach 2:
The light emission is extended from a zero-dimensional point source to a one-dimensional linear array along the polymer rod, increasing the illuminated area and distributing light intensity across multiple spatial dimensions
2Area of stationary object
If a polymer rod is used for light diffusion, then broader area illumination is achieved, but alignment precision with the light source becomes critical
Solution Approach 1:
The collet mechanism creates a self-aligning assembly where the polymer rod, collet, and collar work together to automatically position the light source at the optimal location within the rod, eliminating the need for high-precision manual alignment
Solution Approach 2:
The interference fit between the collar and polymer rod, combined with the collet's compression mechanism, creates a self-aligning system that automatically positions components correctly during assembly without requiring external alignment tools or procedures
3Duration of action of moving object
If a rechargeable battery is integrated, then sustained use is enabled, but device complexity increases
Solution Approach 1:
The cap serves multiple functions: it seals the glowstick, provides structural support, and houses the charge port interface, eliminating the need for separate components and reducing overall device complexity
Solution Approach 2:
The charge port is nested within the cap structure, with the internal cap providing a recess that houses the charge port interface, allowing the charging functionality to be integrated without adding external complexity
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 effectively diffuses light for broader area illumination, ensuring visibility without blinding effects and providing a rechargeable solution for sustained use.
Implementation Method 1
a light source having a primary direction of emission
Implementation Method 2
it is desirable to have a light defusing mechanism, in order to light a larger area at a lower light level
Data Source
AI summary
A glowstick includes a lighting module, the lighting module including a light source having a primary direction of emission. The glowstick further includes a polymer rod, the polymer rod interfaced with the lighting module, the polymer rod having a length, a depth, and a width, wherein the length is greater than the depth and the length is greater than the width, the polymer rod proximate to the light source such that the primary direction of emission of the light source is aligned with the length of the polymer rod.