Vehicle Lighting Fixture with Random Prism Cuts
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Solution Overview
Problem
Conventional vehicle lighting fixtures with light guiding lenses suffer from significant luminance differences between near and far positions from the light source, leading to non-uniform light projection and a lack of luxurious appearance due to monotonous light distribution.
Innovation Solution
A vehicle lighting fixture design featuring a light guiding lens with a functional surface containing random arrangements of prism cuts and flute cuts, where the prism cuts have varying sizes and are projected or recessed, and the flute cuts are semi-polygonal and arranged on both surfaces of an inner lens, diffusing and reflecting light to achieve uniform luminance and a luxurious appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guiding lens with a reflective function portion is used to guide light from the light source, then light can be reflected and exit through the light exiting surface, but there is a large difference in luminance between nearer and farther positions from the light source, resulting in decreased uniform luminance
Solution Approach 1:
The light guiding lens is segmented into multiple functional regions: a light incident surface, a light exiting surface, and a functional surface with multiple lens cuts. The functional surface is further divided into prism cuts for reflection and curved surfaces for diffusion, creating distinct zones that perform different optical functions to achieve uniform luminance distribution.
Solution Approach 2:
Different regions of the light guiding lens are given different local properties: the prism cuts provide reflective functionality with specific reflection angles, while the curved surfaces provide diffusive functionality. This local differentiation allows near and far positions from the light source to receive appropriately modified light, achieving uniform luminance across the exit surface.
2Illumination intensity
If curved surfaces are formed between prism cuts to diffuse light, then luminance uniformity is improved, but the light projection becomes monotonous with a wider angle range, resulting in decreased luxurious feeling
Solution Approach 1:
The light guiding lens incorporates asymmetric elements through the combination of prism cuts with specific reflection angles and curved surfaces with varying radii. The prism cuts are arranged to create non-uniform reflection patterns that generate bright spots, while the curved surfaces provide diffusion. This asymmetric design breaks the monotony of uniform light projection and creates a more visually appealing, luxurious pattern.
Solution Approach 2:
Curved surfaces are incorporated between the prism cuts to diffuse light rays. These curved surfaces have specific radii of curvature that control the diffusion angle and pattern. The curvature elements create a softer, more elegant light projection pattern compared to purely planar surfaces, enhancing the luxurious feeling while maintaining luminance uniformity.
3Ease of manufacture
If prism cuts are arranged in a regular pattern, then light distribution is controlled uniformly, but the projection lacks variety and luxurious appearance
Solution Approach 1:
The parameters of the prism cuts are varied to achieve both manufacturability and aesthetic quality. The prism cuts have different reflection angles, sizes, and spacing arrangements. Some prism cuts are positioned to create concentrated bright spots, while others provide broader light distribution. This parameter variation allows the lens to maintain regular manufacturing processes while producing a luxurious, varied light projection pattern.
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 achieves uniform light projection with jewel-toned brightness and a luxurious sense by diffusing light uniformly and reflecting it with dispersed bright spots, enhancing the aesthetic appeal while maintaining high light utilization efficiency.
Implementation Method 1
a plurality of prism cuts configured to reflect light, wherein the plurality of prism cuts are arranged at random on the functional surface
Implementation Method 2
a plurality of flute cuts configured to diffuse light
Data Source
AI summary
A vehicle lighting fixture can achieve uniform projection of light while being capable of providing improved luxurious sense of projected light. The vehicle lighting fixture can include a housing, an outer lens configured to cover an opening of the housing to define a lighting chamber; and a light source and a light guiding lens located in the lighting chamber. The light guiding lens is configured so as to receive light from the light source and guide the light to a light exiting surface thereof for light projection. The light guiding lens has a functional surface which is opposite to the light exiting surface and can include a plurality of flute cuts configured to diffuse light and a plurality of prism cuts configured to reflect light. The plurality of prism cuts are arranged at random on the functional surface.