Vehicle Lighting Device Concave Curved Reflection Part
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Solution Overview
Problem
The efficiency of extracting light from light-emitting elements in vehicle lighting devices is reduced due to light absorption by the substrate, and the presence of wiring wires complicates the reduction of the substrate's exposed area.
Innovation Solution
A vehicle lighting device is designed with a reflection part on the substrate between the side surface of the light-emitting element and the inner wall of the frame part, featuring a concave curved upper surface that protrudes toward the substrate, improving light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the distance between the side surface of the light-emitting element and the inner wall of the frame part is shortened, then the exposed area of the substrate is reduced and light extraction efficiency is improved, but the wiring wire cannot be properly positioned due to the presence of wiring wires on the substrate surface
Solution Approach 1:
The frame part is divided into two distinct functional sections: an inner wall portion that provides structural support and positioning for the wiring wire, and a reflection part with a concave curved surface that optimizes light extraction. This segmentation allows the inner wall to be positioned closer to the light-emitting element while maintaining wiring wire placement capability, thereby reducing substrate exposure area and improving light extraction efficiency without compromising wiring functionality.
Solution Approach 2:
The reflection part is designed with a concave curved surface that protrudes toward the substrate, creating a three-dimensional structure that adds vertical dimension to the otherwise planar substrate surface. This dimensional change allows the reflection part to effectively block light incident on the substrate from the side surface of the light-emitting element, improving light extraction efficiency without requiring further reduction of the horizontal distance between the light-emitting element and frame part.
2Productivity
If the exposed area of the substrate is reduced to improve light extraction efficiency, then less light is absorbed by the substrate, but the wiring wire requires sufficient space on the substrate surface for proper electrical connection
Solution Approach 1:
The frame part is segmented into an inner wall portion and a reflection part, where the inner wall portion is positioned to provide adequate space for wiring wire connection on the substrate surface, while the reflection part with its concave curved surface is positioned to maximize light extraction efficiency by blocking light incident on the substrate. This segmentation resolves the conflict between wiring wire connection requirements and light extraction efficiency.
3Device complexity
If a flat reflection part is used, then the structure is simple, but light extraction efficiency is not maximized compared to a concave curved surface
Solution Approach 1:
The reflection part is designed with a concave curved surface instead of a flat surface. This curvature allows the reflection part to more effectively intercept and redirect light emitted from the side surface of the light-emitting element, preventing light absorption by the substrate and improving light extraction efficiency. The curved geometry optimizes the reflection angle and coverage area without significantly increasing manufacturing complexity.
Solution Approach 2:
The shape parameter of the reflection part is changed from flat to concave curved, which alters the optical path and reflection characteristics. This parameter change enables the reflection part to more effectively block light incident on the substrate while maintaining a relatively simple structural form that can be manufactured using conventional techniques.
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 implementation of the vehicle lighting device with a concave curved reflection part enhances light extraction efficiency by reducing light absorption and allowing for a more compact design, while also minimizing thermal stress and preventing wiring issues.
Implementation Method 1
Light emitted from the upper surface of the chip-shaped light-emitting element and incident on an inner wall of the frame part is reflected on the inner wall of the frame part and irradiated toward the front side of the vehicle lighting device
Data Source
AI summary
The disclosure provides a vehicle lighting device, a vehicle lamp, and a method for manufacturing a vehicle lighting device. The vehicle lighting device according to an embodiment includes: a socket; a substrate provided on one end side of the socket; a light-emitting element provided on the substrate; a frame part provided on the substrate and surrounding the light-emitting element; and a reflection part provided on the substrate and between a side surface of the light-emitting element and an inner wall of the frame part. An upper surface of the reflection part is a concave curved surface that protrudes toward the substrate side.