Vehicle Light Guide Plate with Concave LED Mounting for Uniform Emission
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Solution Overview
Problem
Existing vehicle light devices using light emitting diodes (LEDs) face inefficiencies in surface emission, particularly when the light needs to be distributed over a wide area, leading to reduced light intensity and uneven illumination as the distance from the LED increases, due to the direct installation of LEDs on a light guide plate.
Innovation Solution
The design incorporates a light guide plate with concave and convex portions or a ring shape, where the LED module is installed within these formations, allowing for uniform surface emission across the plate, enhancing light distribution and intensity by optimizing the placement and shape of the light guide plate and pattern parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light emitting diodes are installed in direct type to cover a wide area, then the emission area is increased, but the number of light emitting diodes required increases and spot phenomenon occurs
Solution Approach 1:
The light guide plate is segmented into multiple regions with different refractive indices or optical properties, allowing a single LED to illuminate different areas with appropriate intensity distribution, thereby covering wide areas without increasing LED count
Solution Approach 2:
A light guide plate is introduced as an intermediary component between the LED and the emission surface. The light guide plate receives light from the LED and redistributes it across the desired area through internal light guiding and scattering mechanisms, eliminating the need for multiple LEDs
2Illumination intensity
If light emitting diode is installed at one side of the light guide plate, then surface emission is enabled, but light intensity becomes weak at positions remote from the light emitting diode
Solution Approach 1:
The light guide plate is designed with locally varying optical properties, including concave and convex portions with different refractive indices positioned at specific locations. These local variations redirect and scatter light to ensure uniform intensity distribution across the entire emission surface, particularly enhancing illumination at remote positions
Solution Approach 2:
Concave and convex portions are incorporated into the light guide plate structure to alter light propagation paths. The curved surfaces redirect light rays through total internal reflection and refraction, distributing light more evenly across the emission area and maintaining intensity at remote positions
3Illumination intensity
If the light guide plate is designed with concave and convex portions, then uniform surface emission is achieved, but the manufacturing complexity increases
Solution Approach 1:
The optical parameters of the light guide plate, such as refractive index distribution and surface curvature radii, are optimized to achieve uniform light emission. By carefully selecting and adjusting these parameters, the patent achieves effective light distribution while maintaining manufacturability through standard molding processes
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
This configuration ensures uniform light emission over the entire light guide plate, improving light distribution and reducing the need for multiple LEDs, thus enhancing the overall efficiency and effectiveness of the vehicle's lighting system.
Implementation Method 1
a light guide plate having a side on which the light emitted from the light emitting diode module is incident and emitting the light incident on the side to perform surface emission upwardly
Implementation Method 2
the light guide plate has a plane shape including at least one concave portion and convex portion
Data Source
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AI summary
Disclosed herein is a light device of a vehicle including: a light emitting diode module emitting light; and a light guide plate having a side on which the light emitted from the light emitting diode module is incident and emitting the light incident on the side to perform surface emission upwardly, in which the light guide plate has a plane shape including at least one concave portion and the light emitting diode module is installed in the at least one concave portion. According to the exemplary embodiments of the present invention, when the light guide plate used in the light device installed at the rear of the vehicle to perform the surface emission is formed in a horseshoe shape or a ring shape, the light emitting diode module may be installed at a concave position of the horseshoe shape or the light emitting diode module may be installed along a ring-shaped inner side, thereby uniformly performing the surface emission over the whole of the light guide plate.