Vehicle Lamp Light-Blocking Layout for Uniform LED Emission
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Solution Overview
Problem
Existing light emitting diodes (LEDs) used in vehicle lamps suffer from limited light emission area, hot spot formation, and visibility issues, which affect luminance uniformity and design aesthetics.
Innovation Solution
A lighting device with a reflective layer, resin layers, light blocking layers, and a substrate configuration that includes specific patterned regions and optical films to redirect light emission, enhance heat dissipation, and conceal the LED presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If light emitting diodes are used as light sources for vehicle lamps, then power consumption is reduced and lifespan is extended, but the exit angle of emitted light is relatively small and hot spots are formed
Solution Approach 1:
The patent segments the light blocking function into multiple discrete light blocking patterns arranged in arrays, where each pattern blocks light from specific LED regions. This segmentation allows precise control over light distribution, enabling broader effective exit angles by directing light from multiple LED segments across different angular ranges.
Solution Approach 2:
The patent applies local quality by positioning light blocking patterns at specific locations corresponding to individual LED light sources. Each light blocking pattern is strategically placed to control light emission from its associated LED region, creating localized light distribution optimization that collectively achieves broader overall light coverage and uniformity.
2Use of energy by stationary object
If light emitting diodes are used as light sources for vehicle lamps, then power consumption is reduced and lifespan is extended, but hot spots are formed and uniformity characteristics of the light emitting surface are deteriorated
Solution Approach 1:
The patent divides the light blocking function into multiple discrete patterns arranged in arrays, with each pattern corresponding to specific LED regions. This segmentation enables independent control of light blocking at different locations, preventing concentration of light in single areas and thereby eliminating hot spots while maintaining uniform light distribution across the emitting surface.
Solution Approach 2:
The light blocking patterns serve as intermediary elements between the LED light sources and the light emitting surface. These intermediaries strategically intercept and redirect light paths, distributing light energy more evenly across the surface and preventing direct concentration of light from individual LEDs, thus eliminating hot spots and improving uniformity.
3Use of energy by stationary object
If light emitting diodes are used in vehicle lamps, then low power consumption is achieved, but the light emitting diode is visually recognized from the outside when the lamp is off, resulting in deterioration of aesthetic and design freedom
Solution Approach 1:
The light blocking patterns serve multiple functions simultaneously: they block light during operation to control emission angles and eliminate hot spots, and they conceal the LED structures when the lamp is off to improve aesthetics. This multi-functionality allows a single structural element to address both optical performance and design appearance requirements.
Solution Approach 2:
The light blocking patterns act as intermediary structures that mediate between the functional LED components and the aesthetic requirements of the lamp design. When the lamp is off, these intermediaries visually mask the LED structures from external view, providing design freedom and aesthetic appeal while maintaining the underlying functional structure.
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 improved luminance uniformity, reduced hot spots, enhanced heat dissipation, and concealed LED visibility, allowing for flexible design options and improved aesthetics.
Implementation Method 1
a reflective layer, a resin layer disposed on the reflective layer
Implementation Method 2
a light blocking layer disposed on the substrate, the light blocking layer may include a plurality of light blocking pattern regions
Data Source
AI summary
A lighting device disclosed in an embodiment of this invention includes a reflective layer, a resin layer disposed on the reflective layer, a substrate disposed on the resin layer and including an electrode layer, a plurality of light emitting devices disposed between the resin layer and the substrate, and a light blocking layer disposed on the substrate, the electrode layer may include a first pattern region disposed adjacent to the light emitting device and a second pattern region disposed outside the first pattern region and having a pattern different in size from the first pattern region, and the light blocking pattern region may overlap in a vertical direction with the first pattern region.