Vehicle Lamp Optical Unit for Tilted Beam Pattern Control
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Solution Overview
Problem
Existing vehicle lamps face challenges in forming an optimal beam pattern when their optical systems are installed in a tilted manner due to changes in light irradiation direction, which affects light distribution characteristics.
Innovation Solution
A vehicle lamp design featuring a light source unit and an optical unit with multiple incident and emission lenses arranged in specific configurations to form a beam pattern, including lenses with different light-concentrating powers and tilted orientation to conform to the vehicle's body line, ensuring uniform brightness and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the optical system is installed in a tilted manner to conform to the vehicle's body line, then the aesthetic integration with the vehicle body is improved, but the light distribution characteristics and beam pattern formation deteriorate
Solution Approach 1:
The optical system is divided into multiple lens rows (first lens row, second lens row, etc.) arranged in the up-down direction. Each lens row contains multiple incident lenses and emission lenses that can be independently configured with different light-concentrating powers, allowing each segment to compensate for the tilt effect and maintain proper beam pattern formation despite the tilted installation angle.
Solution Approach 2:
Different lens rows and individual lenses are assigned different light-concentrating powers and optical characteristics. The incident lenses and emission lenses in each row are specifically designed with local optical properties that compensate for the tilt angle, ensuring that each region contributes to forming the correct beam pattern despite the overall tilted installation.
2Manufacturing precision
If multiple lens rows with different light-concentrating powers are used to compensate for tilt, then the beam pattern quality is improved, but the device complexity increases
Solution Approach 1:
Multiple lens rows with different light-concentrating powers are merged into a single integrated optical unit. The incident lenses and emission lenses are combined in alternating rows, working together as a unified system to form the beam pattern, thereby achieving complex optical compensation without proportionally increasing overall system complexity.
Solution Approach 2:
The optical compensation for tilt is achieved by introducing variation in the up-down direction through multiple lens rows arranged vertically. This vertical dimension allows different light-concentrating powers to be applied at different heights, compensating for the horizontal tilt effect and enabling beam pattern formation despite the tilted installation angle.
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 allows for the formation of an optimal beam pattern even when installed tilted, enhancing visibility and reducing glare by maintaining required light distribution characteristics.
Implementation Method 1
an incident lens unit that includes a plurality of incident lenses and an emission lens unit that includes a plurality of emission lenses respectively corresponding to the plurality of incident lenses
Implementation Method 2
a plurality of incident lenses may include: a first incident lens that forms the first lens row; and a second incident lens that forms the second lens row and includes a plurality of incident regions having different light-concentrating powers
Implementation Method 3
an emission lens unit that includes a plurality of emission lenses respectively corresponding to the plurality of incident lenses
Implementation Method 4
configured to transmit therethrough at least a portion of the light incident from the light source unit to form a predetermined beam pattern
Data Source
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AI summary
A vehicle lamp, which is capable of forming an optimal beam pattern even where an optical system is installed in a tilted manner, includes: a light source unit; and an optical unit configured to transmit therethrough at least a portion of light incident from the light source unit to form a predetermined beam pattern. The optical unit includes an incident lens unit including a plurality of incident lenses and an emission lens unit including a plurality of emission lenses respectively corresponding to the plurality of incident lenses. A plurality of lens rows, in each of which the plurality of incident lenses and the plurality of emission lenses extend in a left-right direction, are arranged in an up-down direction. Each of the plurality of lens rows is inclined such that one side is disposed higher than the other side with respect to a horizontal line.