Vehicular Lamp Light Guiding Lens Sideways Projection
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Solution Overview
Problem
Conventional vehicular lamps require additional light sources and increased size to project light in directions other than the forward direction, leading to higher manufacturing costs and compromised light distribution characteristics.
Innovation Solution
A vehicular lamp design incorporating a light guiding lens with a reflection portion and refracting surface, allowing light to be projected in different directions without the need for additional light sources, by adjusting the angles of stepped surfaces on the lens to control light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional light sources are added to project light in directions other than forward, then light distribution characteristics are improved, but manufacturing cost increases and device size increases
Solution Approach 1:
The single light source is designed to serve multiple functions by combining a projection lens for forward light projection and a light guiding lens with reflection portions for sideways light projection. This multi-functional design eliminates the need for separate light sources for different directions, reducing device complexity while maintaining versatile light distribution capabilities
Solution Approach 2:
The invention merges the functions of forward light projection and sideways light projection into a single optical system. The light guiding lens integrates reflection portions that redirect light from the single light source toward the side, combining multiple light projection functions into one unified structure rather than using separate light sources
2Adaptability or versatility
If additional light sources are added to project light in directions other than forward, then light distribution characteristics are improved, but device size increases
Solution Approach 1:
The single light source is designed to serve multiple functions by combining a projection lens for forward light projection and a light guiding lens with reflection portions for sideways light projection. This multi-functional design eliminates the need for separate light sources for different directions, reducing device complexity while maintaining versatile light distribution capabilities
Solution Approach 2:
The invention merges the functions of forward light projection and sideways light projection into a single optical system. The light guiding lens integrates reflection portions that redirect light from the single light source toward the side, combining multiple light projection functions into one unified structure rather than using separate light sources
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
Enables light projection in directions other than the forward direction without adding new light sources, improving light distribution characteristics while reducing the size and cost of the light source unit.
Implementation Method 1
a light guiding lens having an incident surface on which light emitted from the light source is incident, an output surface facing the projection lens, and a reflection portion on an outer peripheral side surface
Implementation Method 2
a reflection portion on an outer peripheral side surface between the incident surface and the output surface
Data Source
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AI summary
A vehicular lamp is capable of projecting light in a forward direction and light in a direction different of the projection lens from the forward direction. The vehicular lamp includes: a light source (3) that emits light forward, and a projection lens (4) that projects light emitted from the light source (3) forward. The projection lens (4) includes a first lens surface (4a) located on a side facing the light source (3), and receiving light emitted from the light source (3), a second lens surface (4b) located on a side opposite to the first lens surface (4a) to output received light forward, and an output portion (14) located on an outer peripheral side surface between the first lens surface (4a) and the second lens surface (4b) and configured to output a part of light (L') having been incident on and entered through the first lens surface (4a) in a direction different from the forward direction.