Filament-Style LED Bulb Layout Without Optical Fiber Loss
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Solution Overview
Problem
LED light bulbs struggle to replicate the luminance and luminous flux of incandescent bulbs without using optical fibers, leading to efficiency and lifetime reductions due to coupling and waveguide losses.
Innovation Solution
A light bulb design featuring a translucent base board with mounted LED chips, power-supply leads extending into the globe, and a sealing material that converts light wavelengths, simulating the filament appearance and emission of incandescent bulbs without optical fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical fiber is used to guide light from LED to reproduce filament appearance, then the incandescent-like light emission is achieved, but coupling loss and waveguide loss occur which reduce efficiency and luminous flux
Solution Approach 1:
The patent extracts and removes the optical fiber component from the system entirely. Instead of using optical fiber to guide light, the invention directly mounts LED chips on a translucent base board that is visible through the globe, eliminating coupling loss and waveguide loss while maintaining the filament-like appearance through direct LED emission.
Solution Approach 2:
The patent creates a visual copy of the filament appearance by mounting LED chips on a translucent base board that can be seen through the globe. This copying approach reproduces the aesthetic effect of visible filaments without using actual optical fibers, thereby avoiding the associated energy losses.
2Productivity
If input power to LED is increased to compensate for coupling loss and achieve high luminous flux, then luminous flux is improved, but efficiency and lifetime are reduced
Solution Approach 1:
By removing the optical fiber component, the patent eliminates the source of coupling and waveguide losses. This allows the system to achieve high luminous flux without needing to increase input power, thereby maintaining high efficiency and extending LED lifetime.
3Illumination intensity
If LED light bulb is designed to provide high luminance for direct filament viewing, then decorative appearance is improved, but energy consumption increases
Solution Approach 1:
The patent uses LED chips mounted on a translucent base board to create a visual copy of the filament appearance. This approach provides sufficient luminance for decorative viewing while consuming significantly less energy than traditional incandescent bulbs, as LEDs are inherently more energy-efficient light sources.
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
This design enhances efficiency and luminous flux by eliminating coupling losses and providing a high-luminance, long-lasting LED light bulb that mimics the appearance of incandescent bulbs.
Implementation Method 1
a sealing material that converts light wavelengths
Data Source
AI summary
A light bulb shaped lamp (1) according to the present invention includes: a base board (120); an LED chip (110) mounted on the base board (120); a base (190) for receiving power from outside; at least two power-supply leads (140) for supplying power to the LED chip (110); and a globe (170) for housing the base board (120), the LED chip (110), and the power-supply leads (140), the globe being partially attached to the base (190), the base board (120) is translucent, each of the two power-supply leads (140) is extended from a side of the base toward inside of the globe and is connected to the base board (120), and the LED chip (110) is provided between (i) a portion at which one of the two power-supply leads (140) and the base board (120) are connected and (ii) a portion at which the other of the two power-supply leads (140) and the base board (120) are connected.