Vehicle Lighting Device With Patterned Light Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle lighting devices with light guides experience light loss and non-uniform light emission due to the presence of air layers and the need for improved luminous efficacy.
Innovation Solution
A vehicle lighting device with a light guide featuring a light emitting portion with patterns of increasing width from the light source and a back cover with uniformly spaced patterns, along with a sealing member made of UV silicon to prevent air layers and enhance light transmission, ensuring uniform light emission and preventing dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide with patterns is used to guide light from the light source, then indirect lighting is achieved without direct exposure of the light source, but light loss occurs during light movement and non-uniform light emission results with dark areas formed
Solution Approach 1:
The patent applies local quality by varying the width of patterns in different regions of the light guide. Specifically, the width of patterns is adjusted according to the local light intensity requirements - narrower patterns near the light source and wider patterns farther away - to achieve uniform light emission across the entire light guide while compensating for light loss during transmission.
2Illumination intensity
If patterns of varying width are formed at the light emitting portion to compensate for light loss, then uniform light emission is achieved, but the patterns appear non-uniform when viewed from outside in the OFF state
Solution Approach 1:
The patent employs asymmetry by forming patterns with different widths at the light emitting portion to achieve uniform light emission. The asymmetric pattern widths are strategically designed to compensate for light loss while maintaining aesthetic appearance when the vehicle is stationary, resolving the conflict between functional uniformity and visual symmetry.
3Ease of manufacture
If air layers are present between components, then assembly is simplified, but light transmission is reduced and luminous efficacy decreases
Solution Approach 1:
The patent extracts and eliminates air layers between the light guide and back cover by introducing a sealing member that creates direct contact between components. This removal of the air layer medium eliminates the harmful optical interface, significantly improving light transmission and luminous efficacy while maintaining assembly feasibility through the sealing member design.
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 enhanced luminous efficacy and uniform lighting by minimizing light loss through the use of UV silicon as a sealing member and strategically designed patterns, preventing air layers and ensuring consistent light distribution.
Implementation Method 1
a light guide including a light emitting portion formed with a plurality of first patterns arranged in a longitudinal direction of the light emitting portion, to guide the light
Implementation Method 2
a sealing member made of UV silicon to prevent air layers and enhance light transmission
Data Source
AI summary
Disclosed is a lighting device of a vehicle capable of achieving an enhancement in luminous efficacy. The disclosed lighting device includes a light source for generating light, a light guide including a light emitting portion formed with first patterns arranged in a longitudinal direction of the light emitting portion, to guide the light, the light emitting portion performing light emission using the light, and a light receiving portion to receive the light generated by the light source, and a back cover, on which the light guide is mounted. The back cover is formed with second patterns arranged in a longitudinal direction of the back cover at a portion of the back cover, on which the light receiving portion is mounted. The first patterns are formed to have a greater width with increasing distance from the light source. The second patterns are formed to have the same width.