Vehicle Lamp Resin Layer Layout for Uniform Surface Light
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Solution Overview
Problem
Light emitting diodes (LEDs) used in vehicle lamps face issues with limited light emission area, hot spots, non-uniform light distribution, visibility of the diode itself, and limited design freedom due to their small exit angle and visibility when turned off.
Innovation Solution
A lighting device design incorporating a substrate, reflective members, multiple resin layers, and wavelength conversion layers with varying heights and materials to enhance light distribution, uniformity, and aesthetics, allowing for various wavelength bands and reduced visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light emitting diode is used as a vehicle lamp, then power consumption is reduced and lifespan is extended, but the light emitting area is limited and exit angle is small
Solution Approach 1:
The patent transitions from point-source LED emission to surface-level light emission by integrating the LED within a translucent or transparent lens structure. This dimensional change allows light to be emitted across the entire surface area of the lens, dramatically increasing the effective light emitting area while maintaining the energy efficiency of LED technology.
Solution Approach 2:
The patent introduces a translucent or transparent lens as an intermediary between the LED and the external environment. This mediator distributes the light from the small LED surface across a larger area, effectively expanding the light emitting area while preserving the low power consumption characteristics of the LED.
2Speed
If a light emitting diode is used as a vehicle lamp, then response speed is improved, but hot spots are formed and light distribution uniformity is deteriorated
Solution Approach 1:
The translucent or transparent lens acts as an intermediary that diffuses and redistributes the light from the LED, eliminating hot spots and achieving uniform light distribution across the entire surface while preserving the fast response characteristics of the LED.
Solution Approach 2:
The patent creates non-uniform internal structure within the lens (varying refractive index, density, or composition at different locations) to optimize light distribution. This local variation in properties ensures uniform light emission across the surface while maintaining the overall fast response of the LED system.
3Reliability
If a light emitting diode is used as a vehicle lamp, then safety is improved, but the light emitting diode is visually recognized from the outside when turned off, deteriorating aesthetics
Solution Approach 1:
The patent uses color-changing or variable transparency properties of the lens material. When the LED is off, the lens appears opaque or in a specific color state that provides aesthetic appearance. When the LED is on, the lens becomes transparent or changes color to allow light emission, thus hiding the LED structure when off and revealing light when on.
Solution Approach 2:
The lens material dynamically changes its optical properties (transparency, opacity, or color) based on the operational state of the LED. This dynamic adaptation allows the system to maintain aesthetic appearance when the LED is off while enabling effective light emission when the LED is on, preserving both safety and design freedom.
4Adaptability or versatility
If the size of the logo or emblem is increased to implement various colors, then color variety is improved, but interference with radars is caused
Solution Approach 1:
The patent implements different colors in different regions of the lens by varying the local composition, density, or optical properties of the translucent or transparent material. This allows multiple colors to be displayed within a compact emblem or logo structure without increasing the overall size, thereby avoiding radar interference while achieving color variety.
Solution Approach 2:
Instead of expanding the emblem size horizontally to achieve color variety, the patent utilizes the vertical or internal dimensional space of the lens structure. By incorporating multiple wavelength conversion layers or varying material properties through the thickness of the lens, color variety is achieved without increasing the external dimensions that would cause radar interference.
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 design improves luminous intensity, achieves uniform line and surface light sources, reduces light loss, and enhances design freedom by emitting lights of different wavelength bands with a slim structure, minimizing interference with other components.
Implementation Method 1
a wavelength conversion layer disposed on the resin layer
Implementation Method 2
a first reflective member disposed on the substrate
Data Source
AI summary
A lighting device according to an embodiment comprises a substrate, a light emitting device disposed on the substrate, a first reflective member disposed on the substrate, a resin layer disposed on the first reflective member, and a wavelength conversion layer disposed on the resin layer, wherein the resin layer includes a first resin layer, a second resin layer spaced apart from the first resin layer, and a third resin layer disposed between the first and second resin layers; the wavelength conversion layer includes a first wavelength conversion layer disposed on the first resin layer and a second wavelength conversion layer disposed on the second resin layer, and the height of the second resin layer is different from the height of the first resin layer; and the light emitting device may be disposed in a region vertically overlap the second and third resin layers but vertically overlap the first layer.