Bulb-Type Light Source With Segmented Substrate For Omnidirectional Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light bulbs with filament sources have low light output and high power consumption, and light-emitting devices used as replacements often have limited light emission direction when designed to mimic filament bulbs.
Innovation Solution
A bulb-type light source with a substrate having flat and bendable portions, light-emitting device chips, and a fluorescent layer that converts light wavelength, arranged to provide uniform light emission in all directions, including a globe for light transmission and a power board for electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If light emitting devices are designed to have the same shape as conventional filament bulbs, then decorative appearance is maintained, but light emitting direction becomes limited
Solution Approach 1:
The substrate is divided into multiple flat portions and non-flat portions, allowing light emitting sources to be positioned at different orientations. This segmentation enables light to be emitted in multiple directions while maintaining the overall bulb shape, resolving the contradiction between shape consistency and light emission versatility.
Solution Approach 2:
The substrate incorporates non-flat portions that create asymmetric positioning of light emitting sources. This asymmetry allows different sections of the bulb to emit light in different directions, breaking the limitation of uniform light emission while preserving the conventional bulb外形.
2Device complexity
If conventional filament bulbs are used, then simple structure is maintained, but light amount is low and power consumption is high
Solution Approach 1:
The patent replaces the traditional filament-based incandescent system with light emitting devices (LEDs) mounted on a substrate. This substitution eliminates the need for a fragile filament while providing lower power consumption and higher light output, maintaining structural simplicity through the integrated substrate design.
3Use of energy by moving object
If light emitting devices replace filament, then power consumption is reduced, but light emission direction becomes limited
Solution Approach 1:
By segmenting the substrate into flat and non-flat portions, the patent enables light emitting devices to be positioned at various angles, achieving omnidirectional light emission while maintaining the energy efficiency benefits of LED technology.
Solution Approach 2:
The substrate design adds dimensional complexity with non-flat portions, allowing light emitting sources to orient in three-dimensional space. This enables light to be emitted in multiple directions without compromising the low power consumption advantage of LED technology.
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 high light uniformity in all directions, reducing heat accumulation and improving heat dissipation, while maintaining a conventional bulb shape and reducing manufacturing costs by using a metal substrate.
Implementation Method 1
a fluorescent substrate layer covering one or more light emitting sources and converting a wavelength of a light from the light emitting source
Data Source
AI summary
A lighting device includes a substrate having a plurality of flat portions and a non-flat portion disposed between the flat portions, a plurality of light emitting sources disposed on the substrate, a fluorescent substrate layer covering one or more light emitting sources and converting a wavelength of a light from the light emitting source, and a connection line disposed on the substrate and electrically connecting the light emitting sources adjacent to each other between the adjacent light emitting sources. The substrate has a first end and a second end are arranged at different distance from a central axis.