Sensor-Integrated Vehicle Lamp Layout for Uniform Light and Detection
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Solution Overview
Problem
Existing lighting devices using light emitting diodes (LEDs) face issues with limited emission angle, interference with detection sensors, and hot spot phenomena leading to non-uniform light distribution, particularly in vehicle lamps.
Innovation Solution
A lighting device design featuring a sensor, substrate, light source, reflective layer, and resin layer with specific reflective pattern groups and light blocking layers to prevent interference and ensure uniform light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light emitting diode is used as a vehicle lamp, then power consumption is reduced and lifespan is extended, but the emission angle of emitted light becomes relatively small
Solution Approach 1:
The patent transforms the point-source LED emission into a linear light source by arranging multiple LEDs along a line and using a light guide plate to distribute light along the line, effectively changing the emission geometry from point to line and increasing the effective emission angle
Solution Approach 2:
The patent divides a single LED light source into multiple segmented LEDs arranged along a line, with each segment contributing to the overall linear light distribution, thereby increasing the effective emission angle while maintaining LED efficiency
2Illumination intensity
If a lamp is applied to the logo or emblem in front of the vehicle, then brand visibility is enhanced, but interference is caused to the detection sensor located in the front
Solution Approach 1:
The patent extracts the harmful light emission from the sensor detection area by positioning the light source and light guide such that light is emitted only from the logo/emblem regions, separating the lighting function from the sensor detection zones
Solution Approach 2:
The patent applies light emission locally only to the logo or emblem regions while maintaining dark zones in the sensor detection areas, creating spatially differentiated lighting that provides brand visibility without sensor interference
3Illumination intensity
If the light source is concentrated at specific points, then luminous intensity is increased, but hot spot phenomenon occurs and uniformity characteristics of the light emitting surface are deteriorated
Solution Approach 1:
The patent segments the light source into multiple distributed LED elements along a line and uses a light guide plate to evenly distribute the light, preventing concentration at single points and eliminating hot spots while maintaining high overall luminous intensity
Solution Approach 2:
The patent changes the light distribution parameter from concentrated point-source emission to distributed linear emission with controlled intensity profiles, achieving both high luminous intensity and uniformity by adjusting the spatial distribution of light sources and guide geometry
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 enables effective object detection and uniform light distribution by minimizing interference and hot spots, enhancing detection accuracy and luminance uniformity.
Implementation Method 1
a reflective layer disposed between the substrate and the resin layer and including a plurality of reflective pattern groups
Data Source
AI summary
A lighting device according an aspect of the current disclosure includes a sensor that emits and receives signals to detect object, and a light source module disposed on the sensor, wherein the sensor transmits and receives the signals through the light source module, wherein the light source module includes a substrate, a light source disposed on the substrate, and a resin layer disposed on the light source, and wherein a distance between the sensor and the light source module is about 60 mm or more.