LED Light-Emitting Apparatus Curved Mounting Color Mixing
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Solution Overview
Problem
Light-emitting apparatuses using multiple LED devices of different colors struggle with insufficient color mixing, resulting in uneven hue distribution and visibility of LED devices when not emitting light due to their distinct phosphor coatings.
Innovation Solution
A light-emitting apparatus design featuring a side-emitting LED device and a top-emitting LED device, where the side-emitting device emits light laterally and is reflected upward by a trapezoidal reflecting frame, while the top-emitting device emits light upward and is positioned to straddle the side-emitting device, with a lens that refracts and reflects light for uniform distribution, and a reflective layer on the sealing resin to enhance color mixing and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple LED devices of different colors are mounted on a planar or trapezoidal mounting surface, then the LED devices can be easily manufactured and assembled, but the light rays from different LED devices are not sufficiently mixed, resulting in uneven color distribution and visible phosphor differences
Solution Approach 1:
The patent transitions from a planar mounting surface to a three-dimensional curved mounting surface that follows the inner contour of the reflective cup. This dimensional change allows LED chips to be arranged along the curvature, enabling light rays from different colored LEDs to mix more effectively while maintaining uniform color distribution across the illuminated surface.
Solution Approach 2:
The mounting surface is designed with a curved cross-sectional shape that matches the reflective cup's contour. This curvature causes light rays from different LED devices to reflect and mix more uniformly, eliminating the color separation and phosphor visibility issues associated with planar or trapezoidal mounting surfaces.
2Illumination intensity
If LED devices are coated with different colored phosphors to achieve desired spectral characteristics, then the camera flash can capture accurate white balance, but the LED devices become visible through the lens when not emitting light, creating an aesthetic problem
Solution Approach 1:
The patent applies different colored phosphors to specific LED chips based on their functional requirements for spectral characteristics, while the curved mounting arrangement ensures that when not emitting light, the phosphor-coated LED devices appear uniform through the lens. The local phosphor application maintains spectral accuracy while the overall curved geometry hides individual phosphor color differences.
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 apparatus achieves desired color mixing for light emission and a uniform appearance when not emitting light, improving both the color consistency and aesthetic appeal by ensuring even light distribution and hiding the LED devices' phosphor differences.
Implementation Method 1
light rays emitted from the two LED devices are reflected by the reflective faces located on the opposite sides of the reflective frame
Implementation Method 2
a total internal reflection (TIR) lens, positioned over the diode, for gathering light emanating from the light-emitting diode in such a manner as to intensify the light emitted from the diode and the light reflected by the face
Data Source
AI summary
Provided is a light-emitting apparatus including a substrate, an LED light source disposed on the substrate, and a reflecting frame disposed laterally of the LED light source on the substrate, wherein the LED light source includes a side-emitting LED device which is disposed on the substrate, and which emits light laterally toward the reflecting frame, and a top-emitting LED device which is disposed above the side-emitting LED device on the substrate so as to straddle the side-emitting LED device and so as to not block a portion of the light emitted from the side-emitting LED device, and which emits light upward, the light being different in color than the light emitted from the side-emitting LED device, and wherein the reflecting frame is disposed so that the light emitted from the side-emitting LED device is reflected upward.