Rear-View Mirror Optical Assembly for Directional LED Light Control
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Solution Overview
Problem
Existing light emitting diode (LED) based vehicle lamps face issues with non-uniform light emission, directivity, and potential obstruction of the driver's view due to light emission in unwanted directions, necessitating improved luminous intensity, uniformity, and controlled light exit direction.
Innovation Solution
An optical assembly with a housing featuring an inclined bottom surface and inner surfaces, along with a lighting module having an inclined substrate and resin layer, controls light emission direction and luminance values, enhancing luminous intensity and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light emitting diodes are used to increase light emitting area, then the light emitting area is increased, but light is emitted in various directions causing visual information to not be effectively provided and potentially obstructing the view of other drivers
Solution Approach 1:
The patent applies local quality by creating different height regions within the housing: a first region with a first height and a second region with a second height greater than the first height. The light emitting device is positioned to emit light primarily into the first region, while the second region serves as a light trapping zone. This spatial differentiation of heights creates localized functional zones that control light distribution directionally, allowing increased light emitting area while preventing unwanted direction emission through the light trapping second region.
2Reliability
If light emitting diodes are used for blind spot detection, then rear sight information can be provided to the driver, but light emitted toward other vehicles may cause glare and accidents
Solution Approach 1:
The patent creates localized functional zones through height differentiation: the first region (lower height) provides effective light emission for blind spot detection functionality, while the second region (higher height) acts as a light trapping zone that prevents glare from reaching other drivers. This local quality approach ensures reliable rear sight information provision while eliminating harmful glare effects.
Solution Approach 2:
The patent converts the potentially harmful effect of light emission in unwanted directions into a beneficial light trapping mechanism. The second region with greater height is specifically designed to trap light that would otherwise be emitted toward other vehicles, transforming what could be harmful glare into contained light that serves the blind spot detection function without causing accidents.
3Illumination intensity
If conventional lighting modules are used, then light emission is achieved, but hot spots and light loss occur due to non-uniform light distribution
Solution Approach 1:
The patent eliminates hot spots and light loss by creating localized functional zones with different heights. The first region provides uniform light emission while the second region traps and redistributes light that would otherwise be lost. This spatial differentiation ensures uniform illumination intensity throughout the light emitting area without creating concentrated hot spots or energy loss.
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 provides controlled light emission, minimizing hot spots and light loss, ensuring high luminance for the driver while reducing glare for other vehicles, thus improving safety and visibility.
Implementation Method 1
an upper surface of the resin layer emits by diffusing the emitted light from the light emitting device
Data Source
AI summary
The optical assembly disclosed in the embodiment includes a housing having an inclined bottom surface, a plurality of inner surfaces around an outer periphery of the bottom surface, and a receiving space in which an upper portion is opened; and a lighting module disposed on the inclined bottom surface, wherein the lighting module includes a substrate inclinedly disposed on the inclined bottom surface; at least one light emitting device disposed on the substrate; and a resin layer sealing the light emitting device and the substrate, wherein an upper surface of the resin layer emits light by diffusing light emitted from the light emitting device, wherein the plurality of inner surfaces includes a first inner surface adjacent to the light emitting device, a second inner surface facing the first inner surface, and third and fourth inner surfaces facing each other and disposed between the first and second inner surfaces, wherein a height between the bottom surface of the housing and an upper surface of the housing increases from the first inner surface toward the second inner surface, and decreases from the third inner surface toward the fourth inner surface.