Vehicle Lighting Device Substrate Area Expansion via Recessed Mounting
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Solution Overview
Problem
The challenge is to increase the substrate area of a vehicle lighting device without enlarging the external dimensions of the mounting portion, which is necessary for accommodating more elements and maintaining miniaturization and compatibility with existing vehicle lamps.
Innovation Solution
The solution involves a mounting portion with a recessed area and protruding bayonets, where the substrate is positioned on the bottom surface of the recessed area, allowing corner portions of the substrate to overlap with the bayonets, thereby increasing the substrate area without increasing the external dimensions of the mounting portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the external dimension of the mounting portion is increased to increase the substrate area, then the substrate area increases, but the vehicle lighting device cannot be mounted on an existing vehicle lamp and miniaturization cannot be achieved
Solution Approach 1:
The substrate is nested within the mounting portion by positioning corner portions of the substrate on the inside of the mounting portion's outside surface, allowing the substrate to utilize the internal space of the mounting portion without increasing external dimensions. This nesting approach enables the substrate area to be maximized within the constrained external dimensions, resolving the contradiction between increasing substrate area and maintaining compact size for existing vehicle lamp compatibility.
2Adaptability or versatility
If the number and types of elements and members on the substrate increase to process advanced functions, then the functionality improves, but the substrate area must be increased
Solution Approach 1:
The patent utilizes the three-dimensional space within the mounting portion by positioning substrate corner portions on the inside of the mounting portion's outside surface, effectively using vertical and radial dimensions rather than just increasing horizontal area. This dimensional approach allows more elements and members to be accommodated on the substrate without proportionally increasing the external dimensions of the mounting portion, thereby supporting advanced functions while maintaining compact size.
3Length of moving object
If the corner portion of the substrate is provided on the inside of the mounting portion to miniaturize the device, then the external dimensions are reduced, but the substrate area is limited
Solution Approach 1:
The patent applies local quality by specifically positioning corner portions of the substrate on the inside of the mounting portion's outside surface while allowing other portions of the substrate to extend outward. This localized arrangement maximizes the use of available space within the mounting portion without requiring a uniform reduction in substrate area, thereby achieving miniaturization of the overall device while preserving sufficient substrate area for mounting necessary elements.
Data Source
AI summary
According to one embodiment, a vehicle lighting device includes a mounting portion that has a recessed portion; a plurality of bayonets that are provided on an outside surface of the mounting portion; a substrate that is provided on a bottom surface of the recessed portion; and a light emitting element that is provided on a side of the substrate opposite to a bottom surface side of the recessed portion. In a case where the vehicle lighting device is viewed from a light emitting side, at least one corner portion of the substrate overlaps with one of the plurality of bayonets.