Vehicle Lamp Light Directing Unit for Testing Cost Reduction
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Solution Overview
Problem
Conventional vehicle lamps with lighting units spaced greater than 75 mm require high precision optical design and manufacturing, increasing complexity and cost due to separate testing for each unit, whereas units closer than 75 mm can be tested as a single lamp, reducing complexity and cost.
Innovation Solution
A vehicle lamp design featuring a lighting unit, a lens, an optical transparent member, and a light directing unit that increases the light emitting area by directing light rays from the lighting unit to the optical transparent member, allowing the units to be considered as a single lamp and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the distance between lighting units is greater than 75 mm, then each lighting unit can be independently designed and manufactured, but high precision optical design and manufacturing are required for each unit, increasing device complexity and manufacturing cost
Solution Approach 1:
The patent merges two separate lighting units into a single integrated lamp assembly with a shared optical system. The housing contains both lighting units (92L, 92R) within a unified structure, and the single lens (3) serves both units simultaneously. This integration allows the lamp to be tested as one unit rather than two separate units, reducing manufacturing complexity and cost while maintaining the required light emission functions.
2Device complexity
If the distance between lighting units is reduced to less than 75 mm, then the units can be tested as a single lamp, reducing manufacturing complexity and cost, but the distance between units must be maintained for proper functionality
Solution Approach 1:
The patent positions the lighting units in a spatial arrangement where they share a common optical path through the single lens. By integrating both units within the same housing and directing their light through a shared lens system, the invention creates an overlapping optical field that functions as a unified light source, effectively treating two units as one for testing purposes while maintaining functional independence.
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 enhances light emitting area and luminous intensity, enabling simultaneous testing and reduced manufacturing costs, while maintaining compliance with ECE regulations, and allows for downsizing and energy savings by sharing light sources and heat dissipation.
Implementation Method 1
The lens is disposed in front of the lighting unit for radiating forwardly light rays received from the lighting unit
Implementation Method 2
The light directing unit is disposed between the lighting unit and the optical transparent member for forwardly directing a part of light rays emitted from the lighting unit to the optical transparent member
Implementation Method 3
The optical transparent member radiates forwardly the light rays received from the light directing unit
Data Source
AI summary
A vehicle lamp includes a lighting unit, a lens, an optical transparent member and a light directing unit. The lens is disposed in front of the lighting unit for radiating forwardly light rays received from the lighting unit. The optical transparent member protrudes sidewardly from one side of the lens. The light directing unit is disposed between the lighting unit and the optical transparent member for forwardly directing part of light rays emitted from the lighting unit to the optical transparent member. The optical transparent member radiates forwardly the light rays received from the light directing unit, whereby a light emitting area of the vehicle lamp is increased.