LED Vehicle Lamp Light Guide for Side-Rear Illumination and Cooling
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Solution Overview
Problem
LED vehicle lamps suffer from low paving light efficiency and poor lighting effects due to direct light emission, leading to issues like heat absorption by lenses, damage from high temperatures, and inadequate light distribution, which are not comparable to conventional lamps like halogen and xenon lamps.
Innovation Solution
The LED vehicle lamp design incorporates a light guide member with a transparent peripheral wall featuring stripes and notches for improved light diffusion, a heat dissipation system with strategically positioned fans and heat sinks, and a second circuit board made of aluminum for enhanced thermal conductivity, ensuring uniform 360° light emission and effective heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lens is added to enhance side rear light intensity, then light distribution to side rear is improved, but the lens absorbs light and converts it to heat causing damage after long-term use
Solution Approach 1:
The patent removes the lens component entirely and replaces it with a light guide member that has a different optical mechanism. The light guide member uses total internal reflection and refraction at its peripheral wall to redirect light to the side rear without absorbing significant heat, thus extracting the harmful heat-absorbing function while preserving the light redirection function.
Solution Approach 2:
The patent changes the material parameters and optical properties of the light transmission member, making its peripheral wall transparent to allow light passage while using internal reflection mechanisms. This parameter change enables light redirection without the heat absorption problems of conventional lenses.
2Illumination intensity
If a lens is used to redirect light to side rear, then light distribution is enhanced, but service life is reduced due to heat damage
Solution Approach 1:
The patent extracts the lens component that causes service life problems and replaces it with a light guide member that achieves the same light distribution function without the heat absorption issue, thereby extending service life while maintaining illumination performance.
Solution Approach 2:
The patent uses a light guide member made from inexpensive, heat-resistant materials that can withstand high temperatures without degrading, effectively replacing the vulnerable lens with a more durable component that has extended service life.
3Use of energy by moving object
If LED chips emit light directly forward, then lighting efficiency is high, but paving light efficiency is low due to lack of side emission
Solution Approach 1:
The patent segments the light emission function by using multiple LED chips arranged in different orientations (forward-emitting and sideways-emitting chips) and uses a light guide member with peripheral wall structures to separate and direct light in different directions, achieving both high lighting efficiency and good paving light efficiency.
Solution Approach 2:
The patent adds a lateral light emission dimension by incorporating sideways-emitting LED chips and light guide structures that redirect light to the sides and rear, transforming the single-direction (forward) emission into multi-directional emission without compromising the forward lighting efficiency.
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 achieves lighting effects comparable to halogen and xenon lamps by diffusing light uniformly and preventing heat-related damage, while also addressing power limitations and reducing dark areas, ensuring stable operation and extended lifespan.
Implementation Method 1
stripes extending along a horizontal direction are provided on the peripheral wall of the light transmission member... passing light is diffused and irradiated to a side rear
Implementation Method 2
the lens absorbs part of the light and converts the light into heat during the process of transmitting light
Implementation Method 3
at least one first heat dissipation hole is provided on the top wall... the first heat dissipation hole on the top wall of the light transmission member improves the heat dissipation effect
Implementation Method 4
the second circuit board is made of aluminum for enhanced thermal conductivity
Data Source
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AI summary
The present invention provides an LED vehicle lamp, which includes a first circuit board (131,231,331), wherein an LED chip (132,232,332) is provided on the first circuit board (131,231,331), a light guide member (12,22,32) is provided on one side of a light emitting surface of the LED chip (132,232,332), the light guide member (12,22,32) is transparent and positioned right above the LED chip (132,232,332), light transmission members (11,21,31) are provided outside the light guide member (12,22,32), the first circuit board (131,231,331) and the LED chip (132,232,332), each of the light transmission members (11,21,31) includes a top wall (111,211,311) and a transparent peripheral wall (112,212,312), at least one first heat dissipation hole (1111,2111,3111) is provided on the top wall (111,211,311), and stripes (1121,2121,3121) extending along a horizontal direction are provided on the peripheral wall of the light transmission member (11,21,31).