Grooved LED Lighting Structure for Uniform Surface Emission
Solution Overview
Problem
Conventional vehicle lighting using LEDs experiences a hot spot phenomenon and exposes the phosphor layer when turned on, affecting the exterior image, while increasing the bead content or ink layer to improve this leads to reduced light extraction efficiency.
Innovation Solution
A lighting device with a convex or concave exit surface and reflective members that redirect light to prevent hot spots and hide the phosphor layer, using a phosphor layer on inclined surfaces to convert light wavelength and a reflective layer to ensure uniform surface lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflector is used to illuminate the molar tooth in a dental model, then the illumination intensity is improved, but the reflector occupies space that would otherwise be used for the bite block
Solution Approach 1:
The patent combines the reflector and bite block into a single integrated component. The bite block structure incorporates reflective surfaces that direct light onto the molar tooth, eliminating the need for a separate reflector and thereby preserving space for the bite block while maintaining illumination intensity.
2Illumination intensity
If a separate reflector is added to improve illumination, then the illumination intensity is improved, but the device complexity increases
Solution Approach 1:
The patent merges the reflector function into the bite block structure, creating a single component that serves both as a positioning element and a light-reflecting element. This integration reduces the total number of components and simplifies the overall device complexity while maintaining effective illumination.
Solution Approach 2:
The bite block is designed to perform multiple functions: it provides occlusal surface contact for positioning, prevents over-eruption of teeth, and incorporates reflective surfaces for illumination. This multi-functionality eliminates the need for separate dedicated components, thereby reducing device complexity.
3Illumination intensity
If the light source is positioned closer to the molar tooth to improve illumination, then the illumination intensity is improved, but the available space for other components is reduced
Solution Approach 1:
The patent applies reflective surfaces locally on the bite block structure that are positioned to direct light onto the molar tooth. This localized reflection allows the light source to remain at an optimal distance while still achieving high illumination intensity at the target area, preserving space for other components.
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
Prevents hot spots and maintains light extraction efficiency by ensuring a uniform surface light source and enhancing the exterior image by hiding the phosphor layer when not in use.
Implementation Method 1
a light source positioned to illuminate the molar tooth
Implementation Method 2
a reflector positioned behind the light source and oriented to reflect light onto the molar tooth
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
An embodiment may comprise a lighting device comprising: a substrate comprising a first side surface to a fourth side surface; a resin layer including a plurality of grooves including a bottom surface, an exit surface, and an inclined surface; a plurality of light emitting devices disposed inside the grooves and emitting a first light; a reflective layer formed on the inclined surface; and a diffusion layer disposed on the resin layer. The plurality of grooves extends in a direction from the third side surface to the fourth side surface and are arranged in a direction from the first side surface to a second side surface. The plurality of grooves includes a first groove closest to the first side surface of the substrate and a second groove adjacent to the first groove. The first light emitted from the light emitting device disposed in the second groove is reflected off the reflective layer formed on the inclined surface of the second groove, passes through the exit surface of the second groove, is reflected off the reflective layer formed on the inclined surface of the first groove and passes through the resin layer and the diffusion layer.