LED Bulb Substrate Partial Light Transmittance
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Solution Overview
Problem
The development of cost-effective LED technology for filament bulb applications is hindered by high initial costs and limited brightness in early LEDs, which were primarily used for red light illumination, making them unsuitable for practical use in lighting areas effectively.
Innovation Solution
A LED bulb apparatus featuring a bulb shell, head cap, driver circuit, and light strips with substrates that allow partial light transmittance, heat dissipation materials like Al2O3 and copper, and adjustable LED modules with different color temperatures to enhance visual effects and energy efficiency, along with a central column and heat dissipation air for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If early LED technology is used for illumination, then energy consumption is reduced, but brightness is insufficient and cost is high
Solution Approach 1:
The patent divides the illumination system into multiple LED modules arranged in arrays on both sides of the substrate, with each module containing multiple LEDs. This segmentation allows the system to achieve sufficient total brightness through cumulative light output while maintaining the energy efficiency of individual LED components.
Solution Approach 2:
The patent combines multiple LED modules into a single integrated light strip structure mounted on a common substrate. By merging multiple light-emitting elements into one cohesive unit, the system achieves the required illumination intensity for area lighting while preserving the low energy consumption characteristics of LED technology.
2Illumination intensity
If transparent plastic cases are used for LEDs, then light transmission is improved, but heat dissipation is insufficient
Solution Approach 1:
The patent employs a composite construction where LED modules are mounted on a substrate that integrates both light transmission and heat dissipation functions. The substrate material is selected to provide adequate optical transparency while incorporating thermal management capabilities, combining the benefits of both transparent plastic and heat-conductive materials.
Solution Approach 2:
The patent addresses heat dissipation by introducing a thermal management dimension separate from the optical path. Heat dissipation structures are positioned in proximity to LED modules without blocking light transmission, allowing simultaneous optimization of both light output and thermal management through spatial separation of functions.
3Illumination intensity
If early LED technology is used, then red light illumination is achieved, but color spectrum is limited
Solution Approach 1:
The patent applies local quality by using LEDs with different color characteristics in different modules or positions within the light strip. This allows different regions of the illumination system to emit different colors, creating a comprehensive spectrum and rich visual effects while maintaining the energy efficiency of LED technology.
Solution Approach 2:
The patent utilizes LEDs with varying color temperatures and spectral characteristics to expand the overall color spectrum. By selecting and arranging LEDs with different emission parameters, the system achieves full-spectrum illumination and diverse visual effects, overcoming the limitation of early single-color LEDs.
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 a cost-effective, energy-efficient LED bulb with enhanced visual effects and longer lifespan, capable of producing a richer light spectrum and improved heat dissipation, addressing the limitations of early LED technology.
Implementation Method 1
The substrate has a light transmittance less than 50%
Implementation Method 2
heat dissipation materials like Al2O3 and copper
Implementation Method 3
at least one light strip has a substrate, a top end, a bottom end and multiple LED modules
Implementation Method 4
LED modules are mounted on the substrate
Implementation Method 5
heat dissipation air for improved performance
Data Source
AI summary
A LED bulb apparatus has a bulb shell, a head cap, a driver circuit and at least one light strip. The bulb shell has a light passing shell and a bottom portion. A head cap has a neck portion, a first electrode and a second electrode. The neck portion of the head cap is connected to the bottom portion of the bulb shell forming a container space. A fluorescent layer covers the multiple LED modules. The driving current is transmitted via at least one of the top end and the bottom end of the light strip to the LED modules. The substrate has a light transmittance less than 50%.