LED Resin Exit Surface Layout for Wider Vehicle Lamp Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light emitting diodes (LEDs) used in vehicle lamps have a limited exit angle, resulting in a small light emitting area, which restricts design flexibility and efficiency, and there is a need to enhance the light emitting area while maintaining low power consumption and long lifespan.
Innovation Solution
A lighting device with a substrate, multiple LEDs arranged in rows, and a resin layer with specific exit surfaces that emit light, including convex and flat surfaces, to increase the light emitting area and improve luminous intensity, reducing dark spots and enhancing light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional LEDs are used in vehicle lamps, then low power consumption and long lifespan are achieved, but the light emitting area is limited due to small exit angle
Solution Approach 1:
The patent divides the light emitting structure into multiple segments: the LED chip, the resin layer with multiple exit surfaces, and the reflective layer. By segmenting the light emission paths through multiple exit surfaces (first exit surface, second exit surface, and side surfaces), the effective light emitting area is expanded while maintaining the advantages of individual LEDs
Solution Approach 2:
The patent transitions from conventional single-surface light emission to multi-surface light emission by creating a resin layer with exit surfaces in different dimensions and orientations. The light can exit through the first exit surface, second exit surface, and side surfaces, effectively utilizing three-dimensional space to expand the light emitting area
2Adaptability or versatility
If conventional LEDs with small exit angle are used, then design freedom is increased due to small size, but light uniformity deteriorates with dark spots appearing
Solution Approach 1:
The patent applies different properties to different regions of the resin layer. The first exit surface and second exit surface have different curvatures (first curvature and second curvature), and the reflective layer is positioned at specific locations to reflect light to particular areas. This local differentiation of optical properties ensures uniform light distribution across the entire emission area, eliminating dark spots while preserving design freedom
3Device complexity
If conventional single-surface light emission is used, then device complexity is reduced, but luminous intensity deteriorates due to light loss
Solution Approach 1:
The patent merges multiple light emission paths and surfaces into a single integrated resin layer structure. The first exit surface, second exit surface, and side surfaces work together as a unified light emitting system, with the reflective layer enhancing the combined effect by redirecting light that would otherwise be lost. This merging approach increases luminous intensity without proportionally increasing device complexity
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 provides a line-shaped surface light source with improved luminous intensity and uniformity, increasing design freedom and reducing light loss, while maintaining the advantages of LEDs such as low power consumption and long lifespan.
Implementation Method 1
a resin layer disposed on the first reflective layer... the first surface of the resin layer includes a first exit surface having a first curvature, and a second exit surface having a flat surface or a second curvature
Implementation Method 2
a first reflective layer disposed on the substrate... a second reflective layer disposed on the resin layer
Data Source
AI summary
A lighting device disclosed in an embodiment of the invention includes a substrate; a plurality of light emitting devices on the substrate; a first reflective layer on the substrate; a resin layer on the first reflective layer; and a second reflective layer on the resin layer. The resin layer includes a first surface from which light emitted from the plurality of light emitting devices is emitted, and a second surface opposite to the first surface, wherein the first surface of the resin layer includes a first exit surface having a first curvature, and a second exit surface having a flat surface or a second curvature, wherein a maximum distance from the second surface to the first exit surface may be greater than a maximum distance from the second surface to the second exit surface.