Miniaturized Illuminated Pointer with Integrated Blade Reflectors
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Solution Overview
Problem
Conventional illuminated pointers for instrument panels face challenges in achieving uniform illumination with suitable intensity in miniaturized designs, particularly those with a hub diameter less than 15 millimeters and a volume less than 1100 cubic millimeters, due to the limitations of using large reflectors.
Innovation Solution
The design integrates reflectors into the lower surface of the pointer blade, allowing light to be internally reflected laterally, and includes a diffuser to distribute light evenly, eliminating gaps between the hub and blade for a compact and miniaturized structure with a hub volume of less than 1000 cubic millimeters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If large reflectors are used in the base to provide uniform illumination, then illumination uniformity is improved, but device volume increases
Solution Approach 1:
The patent inverts the conventional location of reflectors from the base to the pointer blade itself. By integrating reflectors directly into the blade structure, the design achieves uniform illumination while minimizing the base size, thereby reducing overall device volume while maintaining illumination quality
Solution Approach 2:
The patent transitions from a two-dimensional base-mounted reflector system to a three-dimensional integrated blade structure with reflectors positioned on the blade's lower surface. This dimensional change allows light to be reflected laterally through the blade, achieving uniform illumination in a more compact configuration
2Volume of stationary object
If the hub diameter is reduced to less than 15 millimeters, then device miniaturization is improved, but illumination uniformity deteriorates
Solution Approach 1:
By moving the reflectors from the base to the blade, the patent enables the hub to be miniaturized while the illumination function is maintained through the blade's integrated reflector system, which compensates for the reduced hub size
Solution Approach 2:
The pointer blade acts as an intermediary structure that carries the reflector function. This allows the hub to be minimized while the blade's reflectors ensure uniform light distribution across the pointer, decoupling the hub size from the illumination requirements
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 approach enables uniform illumination with reduced hot and dark spots, achieving a compact and efficient illuminated pointer assembly that maintains smooth rotation and visual exposure of the pointer blade.
Implementation Method 1
Reflectors are integrally defined at the lower surface of the pointer blade for internally reflecting light propagated upwardly through the base in a lateral direction through the pointer blade
Data Source
AI summary
An illuminable pointer assembly for an instrument panel includes a transparent or translucent base, a transparent or translucent pointer blade, and a hub mounted on the base and supporting the pointer blade. The assembly is miniaturized or capable of being miniaturized by integrating reflectors into a lower surface of the pointer blade to internally reflect light propagated upwardly through the base in a lateral direction to uniformly illuminate the pointer blade.