Head Lamp Optic Rods with Bezier Surfaces

Solution Overview

Problem

Conventional head lamp apparatuses have high manufacturing costs due to multiple light sources and optic rods of the same size, limiting the implementation of various beam patterns and cut-off shapes.

Innovation Solution

A head lamp apparatus with a light source unit comprising first and second LED light sources, separated by optic rods with distinct light receiving and emitting surfaces, including a Bezier surface and a separation deposition surface to prevent interference, allowing for the formation of gradient light and optimized beam patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If multiple optic rods of the same size are used, then the head lamp apparatus can provide sufficient illumination, but the manufacturing cost increases and various beam patterns cannot be implemented

Engineering Contradiction:

ImproveilluminationVSAvoidmanufacturing cost

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent applies local quality by making each optic rod have different optical characteristics tailored to its specific function. The first optic rod has optical characteristics optimized for low beam illumination while the second optic rod has optical characteristics optimized for high beam illumination. This allows each component to be locally optimized for its specific role, enabling various beam patterns without requiring all optic rods to be identical, thereby reducing manufacturing cost while maintaining illumination performance.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If multiple optic rods of the same size are used, then the head lamp apparatus can provide sufficient illumination, but the implementation of various beam patterns and cut-off shapes becomes difficult

Engineering Contradiction:

ImproveilluminationVSAvoidbeam pattern implementation

Core Design Contradiction:

Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by making each optic rod have different optical characteristics tailored to its specific function. The first optic rod has optical characteristics optimized for low beam illumination while the second optic rod has optical characteristics optimized for high beam illumination. This allows each component to be locally optimized for its specific role, enabling various beam patterns without requiring all optic rods to be identical, thereby reducing manufacturing cost while maintaining illumination performance.

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If the light emitting surface is positioned on the Petzval surface of the lens, then light directivity is improved, but light loss may occur due to interference between adjacent optic rods

Engineering Contradiction:

Improvelight directivityVSAvoidlight loss

Core Design Contradiction:

Illumination intensityVSLoss of energy

Solution Approach 1:

The patent applies the taking out principle by extracting the problematic interference region between adjacent optic rods and removing it through the light blocking structure. By positioning the light blocking structure between the first and second optic rods, the patent extracts and eliminates the source of light interference, preventing light loss while maintaining the directivity benefits of having the light emitting surface on the Petzval surface.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies the intermediary principle by introducing a light blocking structure as a mediator between the first and second optic rods. This intermediary element prevents direct optical interference between the two optic rods while allowing each to maintain its optimal positioning on the Petzval surface for achieving good light directivity. The light blocking structure mediates the interaction between adjacent optic rods, preventing harmful effects while preserving beneficial ones.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Reduces the number of LED light sources required, enables the implementation of various beam patterns, and enhances light directivity while preventing light loss and interference, thereby lowering manufacturing costs and improving beam pattern clarity.

Implementation Method 1

a first optic rod (300) having a first light receiving surface (311), and emitting light received from the first light source (110) toward the lens (200) through a first light emitting surface (331)

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Implementation Method 2

a lens (200) which is separated from the light source unit; a first optic rod (300) having a first light receiving surface (311), and emitting light received from the first light source (110) toward the lens (200)

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS10168014B2Head lamp apparatus

Publication Date: 2019.01.01 HYUNDAI MOBIS CO LTD

AI summary

A head lamp apparatus may include: a light source unit including first and second light sources; a lens separated from the light source unit; a first optic rod having a first light receiving surface, and emitting light received from the first light source toward the lens through a first light emitting surface; and a second optic rod having a second light receiving surface, and emitting light received from the second light source toward the lens through a second light emitting surface. At least one of the first and second light emitting surfaces may be positioned on a Petzval surface of the lens.