Curved Light Guide for Vehicle Illumination Contrast Reduction
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Solution Overview
Problem
Existing illumination apparatuses for vehicles suffer from increased illuminance contrast and a deteriorated soft texture illumination effect due to uniform illuminance and rectangular illumination shapes, which are not suitable for indirect illumination with long linear shapes.
Innovation Solution
A light guide member is curved to gradually increase the distance from the opening, reducing illuminance and narrowing the illumination range, achieving a semi-elliptical shape with controlled light emission through a lens and light shield members to manage illuminance and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light guide member is positioned at a constant distance from the opening, then the illumination range has a uniform illuminance and rectangular shape, but the illuminance contrast between internal and external of the illumination range is increased, deteriorating the soft texture illumination effect
Solution Approach 1:
The light guide member is curved in the longitudinal direction to create a gradual distance increase from the opening, transforming the rectangular illumination pattern into a semi-elliptical shape with softened boundaries and reduced illuminance contrast
Solution Approach 2:
Different sections of the light guide member are positioned at different distances from the opening, with the central section closer and the end sections farther away, creating a gradient illuminance distribution that improves soft texture effect
2Shape
If the light guide member is positioned at a constant distance from the opening, then the illumination range maintains a rectangular shape similar to the opening, but the width of the illumination range does not narrow gradually, reducing the illumination effect of indirect illumination
Solution Approach 1:
Curving the light guide member transforms the rectangular illumination shape into a semi-elliptical shape with gradually narrowing width towards the ends, creating a more natural and aesthetically pleasing illumination pattern that enhances the overall illumination effect
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
This solution reduces illuminance contrast and improves the illumination effect by gradually decreasing illuminance towards the ends and narrowing the illumination range, preventing boundary clear illumination and enhancing the soft texture effect.
Implementation Method 1
a light guide member that has a base end surface onto which the light emitted from the light source is incident and a tip surface which is an opposite end surface to the base end surface, and guides the light from the base end surface towards the tip surface
Data Source
AI summary
An illumination apparatus includes a light source that emits light, a light guide member that has a base end surface onto which the light emitted from the light source is incident and a tip surface which is an opposite end surface to the base end surface, and guides the light from the base end surface towards the tip surface, and an attachment member that has a light shield property and an opening corresponding to a shape of the light guide member and accommodates the light guide member in the opening. The light guide member is curved so that a distance between the light guide member and the opening is gradually increased towards the tip surface-side in a longitudinal direction of the light guide member.