Blind Spot Mirror Light Guide Grooves Diffuse LED

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Solution Overview

Problem

Side view mirror blind spot warning systems using LED lamps can dazzle drivers, increasing the risk of accidents, especially at night, and adding diffusing agents to homogenize light increases manufacturing costs.

Innovation Solution

A blind spot area warning device with a light guiding member featuring a light output face, an operating face, a light incident face with grooves, and reflective faces that diffuse and reflect light to create a uniform, non-dazzling alarm light without using diffusing agents, ensuring the light is directed outward through the side view mirror.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If LED lamps are used in blind spot warning systems, then the alarm light is bright and effective, but the light beams can dazzle the driver's eyes and cause accidents

Engineering Contradiction:
Improvealarm light brightnessVSAvoiddriver eye dazzling
Core Design Contradiction:
Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The light guiding member is divided into multiple functional surfaces: a light incident face with multiple grooves for light entry and diffusion, an operating face with multiple reflective faces at different angles, and a light output face. This segmentation allows different portions of the light to be processed differently, diffusing the intense LED light into multiple directions and reducing dazzling while maintaining brightness.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different surfaces of the light guiding member have different optical properties tailored to their specific functions. The light incident face has grooves for diffusion, the operating face has reflective faces for redirection, and the light output face has specific geometry for controlled light exit. This local differentiation optimizes each surface's performance while collectively solving the contradiction between brightness and dazzling.

Inventive Principle:
Principle #3Local quality

2Stability of the object's composition

If diffusing agents are added to homogenize light beams, then the light distribution becomes uniform, but the manufacturing costs are significantly increased

Engineering Contradiction:
Improvelight distribution uniformityVSAvoidmanufacturing cost
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The light guiding member acts as an intermediary optical element between the LED lamp and the driver's eye. Instead of adding chemical diffusing agents to the light source, this solid optical component with precisely engineered grooves and reflective faces performs the diffusion function mechanically, achieving uniform light distribution without increasing material costs for chemical additives.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the chemical approach (adding diffusing agents) with a mechanical/optical approach (structured light guiding member with grooves and reflective faces). The mechanical structure of the light guiding member physically diffuses and redirects light through its geometric features, eliminating the need for expensive chemical additives while achieving the same homogenization effect.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 device generates a uniform, bright, and non-dazzling alarm light that alerts drivers of incoming vehicles effectively, reducing the risk of accidents while maintaining cost-effectiveness by not requiring additional diffusing agents.

Implementation Method 1

the plurality of grooves diffuses light emitted by the light emitting diode lamp

Methodology Applied
Scientific EffectLight diffusion: Diffusion

Implementation Method 2

the plurality of reflective faces reflects the diffused light to uniformly pass outwardly through the light output face

Methodology Applied
Scientific EffectLight reflection: Reflection

Data Source

PatentUS10589675B1Blind spot area warning system for a vehicle side view mirror with light guide disposed cavity of a cover having an incident face with grooves, an end face , output face and opposing operating face
Publication Date: 2020.03.17 HUANG MEI HUI
  • US10589675B1 patent drawing
  • US10589675B1 patent drawing
  • US10589675B1 patent drawing

AI summary

A blind spot area warning and illustrating device includes a light guiding member including a light output face and a light incident face having grooves. The light guiding member further includes an operating face opposite to the light output face and having reflective faces. Each reflective face is at an acute angle to the light output face. A cover is mounted around the light guiding member. The light output face of the light guiding member is aligned with a light transmitting area of a mirror of a side view mirror. A light emitting diode lamp is mounted in the cover and is aligned with the light incident face. When the light emitting diode lamp is activated to emit light, the grooves diffuse the light emitted by the light emitting diode lamp, and the reflective faces reflect the diffused light to uniformly pass outwardly through the light output face.