LED Heat Radiating Member with Expanded Top Surface
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Solution Overview
Problem
Light emitting apparatuses using LEDs face deterioration in emission characteristics due to heat, necessitating effective heat radiation designs to prevent thermal issues.
Innovation Solution
A light emitting apparatus with a body featuring a cavity and a heat radiating member having a main frame with a larger top surface than bottom surface, and subframes that protrude and extend to enhance thermal coupling, combined with a substrate for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional LED light emitting apparatus is used, then the structure is simple, but the heat radiation characteristics are poor leading to deterioration in emission characteristics
Solution Approach 1:
The heat radiating member is divided into a main frame and multiple sub-frames. The main frame provides the primary heat radiation surface, while the sub-frames extend from different sides of the main frame to increase the total heat radiation area and improve thermal coupling with the LED chip, thereby resolving the contradiction between simple structure and poor heat radiation characteristics
Solution Approach 2:
The heat radiating member transitions from a conventional planar structure to a three-dimensional structure with the main frame having a larger top surface than bottom surface, and sub-frames extending vertically and horizontally. This dimensional expansion increases the heat radiation area without proportionally increasing the footprint area, improving heat radiation characteristics while maintaining compact form factor
2Productivity
If heat is not rapidly dissipated, then the structure remains simple, but the emission characteristics deteriorate due to heat accumulation
Solution Approach 1:
The heat radiating member features non-uniform structure with the main frame having a larger top surface than bottom surface, and sub-frames strategically positioned to maximize thermal contact with the LED chip. This local optimization of heat radiation area and thermal coupling at critical locations enhances heat dissipation rate without requiring a complete overhaul of the entire structure
Solution Approach 2:
The heat radiating member acts as an intermediary between the LED chip and the external environment. The main frame and sub-frames create multiple thermal pathways and increase the interface area for heat transfer, effectively mediating the heat dissipation process and improving the heat dissipation rate while maintaining a manageable structural 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 design significantly improves heat radiation characteristics, allowing for rapid and effective discharge of heat generated by the LED, thereby maintaining the light emitting apparatus's performance and extending its lifespan.
Implementation Method 1
a heat radiating member including a main frame which is coupled with the body to form the bottom of the cavity and a sub frame which extends from the main frame
Data Source
AI summary
A light emitting device includes: a body including a cavity formed with a stepped section; an electrode of which one end is disposed on the stepped section and the other end is disposed outside of the body; a metal layer including a main frame and a sub frame extended from the main frame; and a light emitting diode disposed on the metal layer, wherein a bottom surface of the main frame is exposed out from a bottom surface of the body, wherein a portion of a top surface of the main frame is exposed to the cavity, and wherein an area of the top surface of the main frame is larger than an area of the bottom surface of the main frame.