Vehicle Instrument Pointer with Light Through-Hole for Uniform Illumination
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Solution Overview
Problem
The existing pointers for vehicle instrument clusters suffer from nonuniform illumination, particularly at the ends of the pointer blade, due to insufficient light transfer, which is exacerbated by longer blade lengths and white light sources, leading to noticeable illumination inconsistencies.
Innovation Solution
A pointer design that includes a pointer blade with a light through-hole and a weight supporter to distribute light evenly along the blade, using a light pin part to redirect light from the dial through the weight supporter, ensuring indirect light transfer and reducing brightness deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the pointer blade length is increased to improve visibility range, then the illumination uniformity deteriorates due to insufficient light transfer to the end of the blade
Solution Approach 1:
The pointer blade is divided into multiple light receiving regions (first light receiving region and second light receiving region) along its length. Each region independently receives light from the light source, ensuring that even the distal end receives sufficient illumination. This segmentation allows the blade to maintain both increased length for visibility and uniform illumination across all segments.
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 enhanced design achieves balanced illumination across the pointer blade, improving overall illumination quality and reducing light leakage, resulting in more consistent and brighter indications of vehicle state information.
Implementation Method 1
a light through-hole configured to allow the light received from the lower portion of the dial to pass through the pointer weight
Implementation Method 2
a weight supporter, fit between the pointer blade and the pointer weight and below the light through-hole, and that is configured to receive light from the lower portion of the dial and transfer the light received from the lower portion of the dial to the pointer blade
Implementation Method 3
a pointer blade configured to receive light received from a lower portion of the dial, and to emit light
Data Source
AI summary
A pointer to indicate gradations formed in a dial of a vehicle instrument cluster includes: a pointer blade to receive and emit light received from the lower portion of the dial when a blade body formed integrally with a blade arm is rotatably supported above the dial; a pointer weight disposed adjacent to a rear surface of the blade body and having a light through-hole to allow light received from the lower portion of the dial to pass through the pointer weight; a light pin part extending to the rear surface of the blade body from one end of the blade arm and inserted into the light through-hole; and a weight supporter, fit between the pointer blade and the pointer weight and below the light through-hole to receive light from the lower portion of the dial and transfer the light to the pointer blade.