LED Lighting Device with Division Line Light Guide
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Solution Overview
Problem
Conventional LED lighting devices are thick and unsuitable for integration into mobile electronic devices due to their structure, which increases thickness and hinders downsizing, and existing light guide bodies do not support effective light distribution for photography with mobile devices.
Innovation Solution
An LED lighting device with a light guide body having a reflecting surface formed by division lines and connection lines, where each division line is adjusted by similar amplification or contraction to fit within the thickness of the LED module, ensuring all emitted light is reflected and directed towards the irradiation axis for effective light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lens body is disposed facing the upper side of LED element to ensure appropriate light distribution, then light distribution is improved, but thickness of LED lighting device increases
Solution Approach 1:
The patent inverts the conventional arrangement by placing the light guide body between the LED element and the upper surface, rather than having the lens body face upward. This inversion allows light to be guided and distributed through the thickness direction, achieving good light distribution while reducing overall device thickness.
Solution Approach 2:
The patent changes the light distribution approach from a two-dimensional lens surface to a three-dimensional light guide body that utilizes the thickness dimension. By forming a light guide body with specific refractive index and geometry, light is distributed effectively in the thickness direction while maintaining compact overall dimensions.
2Length of moving object
If light guide body is used for light distribution, then thickness can be reduced, but light distribution characteristics for photography are not supported
Solution Approach 1:
The patent optimizes specific parameters of the light guide body including its refractive index (higher than surrounding materials), thickness, and geometric shape. By carefully controlling these parameters, the light guide body achieves effective light distribution in the thickness direction while maintaining compatibility with photography applications in mobile devices.
3Illumination intensity
If virtual reflecting surface is used for light reflection, then light distribution is improved, but thickness of LED lighting device increases
Solution Approach 1:
The patent introduces a light guide body as an intermediary between the LED element and the upper surface. This light guide body with specific refractive index acts as a mediator to redirect and distribute light effectively, replacing the need for a virtual reflecting surface while maintaining compact thickness.
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 allows for a thinner LED lighting device with favorable light distribution characteristics, enabling it to be integrated into mobile devices while maintaining or improving illumination intensity and reducing power consumption.
Implementation Method 1
irradiates light emitted from the LED element of the LED module and propagated through the inside of the light guide body by reflecting the light on the reflecting surface of the light guide body
Data Source
AI summary
In an LED lighting device of the present invention, the reflecting surface of the light guide body is formed of division lines and a connection line connecting between the division lines. Each division line divides a cross section line of a virtual reflecting surface crossing projection lines. Each projection line is radially drawn at a selected angle from a selected point of a given distance away from a center point of the LED element toward the cross section line of the virtual reflecting surface of the light guide body. Each division line is adjusted by similar amplification or similar contraction so as to be contained within the thickness line with its length large enough to receive all the incoming light.