Rear-View Mirror Optical Assembly for Directional LED Light Control
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Solution Overview
Problem
Light emitting diodes (LEDs) used in vehicle lighting systems have a limited directivity angle, leading to inefficient light distribution and potential obstruction of the driver's view, as the emitted light is not effectively directed and can be directed towards other vehicles, increasing the risk of accidents.
Innovation Solution
An optical assembly with a light source module and an aspherical reflective surface that accommodates a light emitting diode, directing the emitted surface light in a controlled manner through a concave recess and transparent cover, minimizing light loss and ensuring uniform luminance.
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, but the light emitting area is limited due to the small size of the LED
Solution Approach 1:
The patent combines multiple light emitting diodes into a single integrated lighting assembly with a common reflective cavity and lens system, effectively merging multiple light sources to achieve a larger effective light emitting area while maintaining the energy efficiency of individual LEDs
Solution Approach 2:
The patent uses an aspherical lens to redirect light in three-dimensional space, transforming the limited directional output of small LEDs into a broader spatial distribution that effectively increases the light emitting area without adding physical size to the LED components themselves
2Area of stationary object
If light is emitted in various directions from the light emitting diode, then the light emitting area increases, but visual information is not effectively provided to the driver and light may obstruct other drivers' views
Solution Approach 1:
The patent implements directional control by designing the reflective cavity and aspherical lens to selectively redirect light from different portions of the LED array to specific target zones, ensuring that light is concentrated toward the driver's position while minimizing emission in directions that would obstruct other drivers' views
Solution Approach 2:
The patent introduces a reflective cavity and aspherical lens as intermediary optical elements between the light emitting diodes and the external environment, which mediate the light distribution by reflecting and refracting light to achieve the desired directional pattern that prioritizes driver visibility while reducing interference to other road users
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 optical assembly enhances light intensity and uniformity, directing high luminance towards the driver while minimizing light towards other vehicles, reducing the risk of interference and improving the reliability of alarm systems.
Implementation Method 1
a lighting module having a resin layer and a light emitting device inside the resin layer, and having an exit surface for emitting light to one side
Implementation Method 2
a reflective portion having a recess in a lower portion of an exit side of the lighting module and an aspherical curved surface at a bottom of the recess
Data Source
AI summary
The optical assembly disclosed in the embodiment of the invention includes: a lighting module having a resin layer and a light emitting device inside the resin layer, and having an exit surface for emitting surface light to one side; a reflective portion having a recess in a lower portion of the exit side of the lighting module and an aspherical curved surface at the bottom of the recess; and a transparent cover on the recess to reflect the surface light to a set region.