LED Lighting Apparatus with Reflective Cup and Textured Diffuser
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Solution Overview
Problem
Conventional LED optics designs have not been optimized for light output uniformity and heat dissipation, leading to inefficient performance in LED-based lighting instruments.
Innovation Solution
A lighting apparatus is designed with a light-emitting package surrounded by a reflective structure for improved light reflection and thermal dissipation, featuring a diffuser cap with a textured and curved surface to enhance light scattering and a thermally conductive substrate with a heat sink for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional LED optics designs are used, then manufacturing simplicity is maintained, but light output uniformity deteriorates
Solution Approach 1:
The lighting apparatus is divided into distinct functional modules: a light-emitting package containing LED dies, a separate reflective structure, and a diffuser cap. This segmentation allows each component to be optimized independently for its specific function while maintaining overall manufacturing efficiency.
Solution Approach 2:
The reflective structure serves dual functions: it reflects light to improve output uniformity and simultaneously acts as a thermal management component. The diffuser cap also provides both optical diffusion and structural protection, reducing the need for additional separate components.
2Temperature
If conventional LED optics designs are used, then device simplicity is maintained, but heat dissipation efficiency deteriorates
Solution Approach 1:
The reflective structure is integrated with the thermal management system, combining light reflection functionality with heat dissipation. The substrate serves as both the mounting platform for LED dies and a thermally conductive pathway to transfer heat away from the light-emitting components.
Solution Approach 2:
A thermally conductive adhesive or interface material is used as an intermediary between the LED dies and the reflective structure/substrate, enabling efficient heat transfer from the high-heat-density LED region to the larger thermal management structure.
3Manufacturing precision
If light is directly emitted without reflection, then device complexity is minimized, but light output uniformity deteriorates
Solution Approach 1:
The reflective structure employs curved or angled surfaces to redirect light rays from the LED dies in a controlled manner, improving the uniformity of light distribution across the output area while maintaining a relatively simple geometric form.
4Duration of action of stationary object
If heat is not actively dissipated, then device complexity is reduced, but LED lifespan deteriorates
Solution Approach 1:
Heat is extracted from the LED dies through the thermally conductive substrate and reflective structure, which serve as heat sinks. This passive thermal management approach extends LED lifespan by maintaining operating temperatures within acceptable ranges without requiring active cooling systems.
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 achieves improved light output uniformity and heat dissipation, reducing glare and extending the lifespan of LED-based lighting instruments by effectively redirecting light and dissipating heat, resulting in more efficient and durable lighting products.
Implementation Method 1
the reflective structure is operable to reflect light radiated by the light-emitting package
Implementation Method 2
the reflective structure is thermal-conductively coupled to the light-emitting package and is operable to thermally dissipate heat generated by the light-emitting package
Implementation Method 3
a diffuser cap with a textured and curved surface to enhance light scattering
Data Source
AI summary
The present disclosure involves a lighting apparatus. The lighting apparatus includes a photonic device that generates light. The lighting apparatus includes a printed circuit board (PCB) on which the photonic device is located. The lighting apparatus includes a diffuser cap having a curved profile covering the PCB and the photonic device. The diffuser cap has a textured surface for scattering light generated by the photonic device. The lighting apparatus includes a thermally conductive cup that surrounds the diffuser cap and thermal conductively coupled to the PCB. The cup has a reflective inner surface that reflects light transmitting through the diffuser cap. The lighting apparatus includes a heat dissipation structure for dissipating heat generated by the photonic device. The heat dissipation structure is thermally coupled to the cup.