Vehicle Meter Illuminated Display with Longitudinal Light Guide
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Solution Overview
Problem
Conventional vehicle meters have limited flexibility in designing the light emitting member due to its arrangement being constrained by the visors, which affects the display quality and stereoscopic visibility, particularly in adapting to the meter's overall design and improving visibility for drivers.
Innovation Solution
A meter design featuring an annular light guiding member within the visor that surrounds the meter units, with a protruding length adjustable in the longitudinal direction, allowing for flexible positioning and luminance control of the light emitting portion, and separating the light source functions to enhance optical design and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light emitting member is arranged on the periphery of meter units constrained by visors, then the meter structure is compact and easy to manufacture, but the flexibility of designing the light emitting member is low and display quality is insufficient
Solution Approach 1:
The light guiding member is configured to protrude in the longitudinal direction of the meter unit, extending from the rear surface toward the front surface. This dimensional extension allows the light emitting portion to be positioned at the protruding end, breaking free from the peripheral arrangement constraint imposed by the visor structure and enabling more flexible design configurations.
Solution Approach 2:
The light guiding member acts as an intermediary component that receives light from the light source and redirects it to the light emitting portion. This mediator enables the separation of the light source position from the light emitting position, allowing the light emitting portion to be arranged flexibly at the protruding end without being constrained by the visor's peripheral structure.
2Reliability
If the light emitting member is arranged peripherally within visor constraints, then the number of components is reduced, but the stereoscopic visibility and display quality of meter units are insufficient
Solution Approach 1:
By extending the light guiding member in the longitudinal direction to create a protruding structure, the light emitting portion is positioned at a different depth plane than traditional peripheral arrangements. This dimensional change enhances stereoscopic visibility by creating depth variation in the light emission, improving display quality without adding excessive component complexity.
3Illumination intensity
If the light emitting portion is positioned at the periphery constrained by visors, then the meter structure is simplified, but the luminance and light emission stability are insufficient
Solution Approach 1:
The light guiding member serves as an optical intermediary that efficiently transfers light from the light source to the light emitting portion at the protruding end. This intermediary structure concentrates and directs light effectively, achieving high luminance at the light emitting portion while maintaining a relatively simple overall configuration compared to multiple separate lighting components.
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 design enables flexible arrangement of the light emitting portion, improving display quality and stereoscopic visibility, ensuring stable and uniform light emission, and adapting to the shape of the visor, enhancing the meter's appearance and functionality, especially at night.
Implementation Method 1
light emitted by the light source and transmitted through the light guiding member
Implementation Method 2
light irradiated from the light source 500 is substantially totally reflected on the reflecting surface 600S
Data Source
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AI summary
A meter, comprising a meter unit, a visor arranged around the meter unit, a wiring board, a light source mounted on the wiring board, an annular light guiding member provided within the visor at a side of a light emitting surface of the light source so as to surround the meter unit, and a light emitting portion forwardly emitting light emitted by the light source and transmitted through the light guiding member and annually provided along an edge portion of the visor so as to surround the meter unit, wherein a protruding-length of the light guiding member is displaced to a longitudinal direction of the meter unit.