Vehicular Light-Emitting Device Brightness Uniformity
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Solution Overview
Problem
Vehicular light-emitting devices with multiple light sources face challenges in reducing brightness unevenness while maintaining effective illumination and controlling power consumption and cost, as increasing the number of light sources can lead to ambiguous identification and reduced performance.
Innovation Solution
A vehicular light-emitting device is designed with multiple light-emitting units, each comprising a light source and a lens that diffuses and emits light, arranged to create multiple brightness peaks at equal intervals, along with a holding part and reflection mechanism to adjust light irradiation and reduce unevenness, and a cover to prevent light diffusion, ensuring stable mounting and controlled light direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light sources is increased to reduce brightness unevenness, then illumination performance is improved, but power consumption and cost increase
Solution Approach 1:
The patent uses optical reflection to create virtual images of light sources, making fewer physical light sources appear as multiple sources. The reflection plate creates symmetric virtual light sources that fill brightness valleys, achieving the effect of more light sources without actually installing more LEDs, thus reducing power consumption while maintaining brightness uniformity.
Solution Approach 2:
The reflection plate acts as an intermediary element that redirects light from existing sources to create additional illumination paths. By positioning the reflection plate between the light sources and the target area, it creates virtual images that supplement the direct light, effectively reducing brightness unevenness without requiring additional power-consuming light sources.
2Illumination intensity
If the number of light sources is increased to reduce brightness unevenness, then illumination performance is improved, but cost increases
Solution Approach 1:
Instead of purchasing and installing multiple physical light sources, the patent creates virtual copies of existing light sources through optical reflection. This approach achieves the desired brightness uniformity effect at lower cost by using a simple reflection plate rather than additional expensive LED components and their associated mounting and wiring infrastructure.
Solution Approach 2:
The reflection plate serves multiple functions: it creates virtual light sources, fills brightness valleys, and maintains a compact structure. This multi-functional element achieves brightness uniformity without requiring separate components for each function, thereby reducing overall manufacturing cost compared to using multiple independent light sources.
3Illumination intensity
If light is reflected and mixed to suppress brightness unevenness, then brightness uniformity is improved, but identification of which light source is lit becomes ambiguous
Solution Approach 1:
The reflection plate is positioned and designed to create virtual images that supplement rather than completely mix with direct light. This allows the reflection to fill brightness valleys while maintaining enough distinction between direct and reflected light paths, preserving partial identification capability of which light sources are active.
Solution Approach 2:
The reflection plate is strategically positioned to create virtual images in specific regions where brightness valleys occur, rather than uniformly mixing light from all sources. This localized reflection approach maintains brightness uniformity in critical areas while preserving the ability to identify which physical light sources are lit based on their distinct spatial characteristics.
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 solution enhances lighting performance by creating the appearance of more light sources than actual, reduces brightness unevenness, and stabilizes light irradiation direction, improving positioning accuracy and reducing power consumption and cost concerns.
Implementation Method 1
a lens configured to diffuse and emit the light received from the light source
Implementation Method 2
the holding part may have a reflection part configured to reflect the light emitted from the lenses toward a light-emitting surface
Data Source
AI summary
The present disclosure enables lighting performance which appears as if there are more light sources than the actual number of light sources, and reduces brightness unevenness. A vehicular light-emitting device includes a plurality of light-emitting units, each of which includes an LED part and a lens configured to diffuse and emit the light received from the LED part, the plurality of light-emitting units being arranged side by side. The plurality of light-emitting units are arranged so that one or more brightness peak values exist between adjacent light-emitting units. Moreover, the light emitted from the lenses of the light-emitting units has a plurality of brightness peaks with respect to the spreading direction of the light, and the arrangement interval of the plurality of light-emitting units is set so that the plurality of brightness peaks of the light emitted from the plurality of light-emitting units are aligned at substantially equal intervals.