Vehicle Lamp Light Guide Body for Thin Profile Uniform Emission
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Solution Overview
Problem
Existing vehicle lamps with side markers face challenges in reducing thickness while maintaining effective light emission and appearance, as conventional configurations either increase thickness due to reflectors or require perpendicular mounting of light sources, leading to unsightly point lighting.
Innovation Solution
A vehicle lamp design featuring a light guide body with an incidence section, emitting section, and a light guide section that extends across the board's thickness direction, utilizing multiple reflecting sections and a diffusion lens to direct and diffuse light, allowing for thinner profiles and improved aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflector is used to make the lens emit light, then the light emission function is improved, but the thickness of the entire lighting tool increases
Solution Approach 1:
The patent introduces a light guide body as an intermediary component between the light source and the emitting surface. Light from the LED enters the light guide body through an incidence section, is guided through the light guide section, and emitted through the emitting section. This mediator enables light emission without requiring a reflector, thereby reducing thickness while maintaining lighting function.
Solution Approach 2:
The patent changes the light transmission path from a traditional reflector-based approach to a light guide body approach that extends in the planar direction rather than requiring perpendicular depth. The light guide section extends from the incidence section to the emitting section in a manner that reduces thickness in the vertical direction while maintaining effective light guidance.
2Illumination intensity
If a reflector is used to make the lens emit light, then the light emission function is improved, but the appearance is worsened due to point lighting
Solution Approach 1:
The light guide body acts as an intermediary that distributes light uniformly across the emitting surface. Instead of light reflecting directly from the LED position (point lighting), the light enters the light guide body and is distributed through the light guide section to the emitting section, creating uniform illumination across the entire emitting surface area.
3Illumination intensity
If the light source board is mounted perpendicular to the light guide body surface, then light can be emitted uniformly, but the thickness of the entire lighting tool increases
Solution Approach 1:
The patent reorients the light source board to be parallel to the light guide body surface rather than perpendicular. The light source is mounted on a board that lies in the same plane as the light guide body, allowing light to enter the incidence section from the side. This dimensional reconfiguration enables uniform light emission through the light guide body while minimizing thickness in the vertical direction.
Solution Approach 2:
Instead of mounting the light source perpendicular to the light guide body surface (traditional approach), the patent inverts the mounting orientation to be parallel to the surface. This inversion of the mounting direction allows the light to enter the light guide body from the incidence section in a manner that achieves uniform emission without increasing thickness.
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 design achieves a reduction in overall thickness and enhances the appearance of the vehicle lamp by ensuring uniform light emission and matching the light direction with the vehicle's surface, while maintaining effective light distribution.
Implementation Method 1
a light guide body configured to guide light emitted from the light source
Implementation Method 2
utilizing multiple reflecting sections and a diffusion lens to direct and diffuse light
Data Source
AI summary
A vehicle lamp includes a light source provided on one surface of a board and a light guide body that guides light emitted from the light source, the light guide body has an incidence section located on a side of the light guide body facing the one surface of the board, an emitting section located on a side opposite to the side facing the one surface of the board, and a light guide section located between the incidence section and the emitting section, and the light guide section has a portion that extends across inside and outside a region where the light guide body overlaps with the board when seen in a plan view, that extends at an outer side of the region, and that extends from one side toward the other side of the board in at least a thickness direction of the board.