Bulb-Type Light Source With Radial LEDs for Uniform Emission
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Solution Overview
Problem
Conventional light bulbs using filaments have low light output and high power consumption, and light-emitting devices designed to mimic filament bulbs often suffer from limited light directionality.
Innovation Solution
A bulb-type light source featuring a substrate with flat and non-flat portions, light-emitting sources, a fluorescent substrate layer, and a connection line, with light-emitting devices arranged radially and connected via a power board and socket, allowing for uniform light emission in all directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light emitting device is used to replace the filament, then power consumption is reduced and light output is improved, but light emission direction is limited
Solution Approach 1:
The light emitting device is divided into multiple light emitting units arranged radially around the central axis. Each unit can emit light in different directions, and collectively they provide omnidirectional light emission while maintaining low power consumption and high light output of LED technology
Solution Approach 2:
The light emitting units are arranged in a radial pattern around the central axis, transitioning from a single-direction linear arrangement to a three-dimensional radial configuration. This spatial arrangement enables light emission in multiple directions simultaneously, solving the directionality limitation while preserving the energy efficiency of LED technology
2Shape
If the light emitting device is designed to have the same shape as a conventional filament bulb, then decorative appearance is maintained, but light emission directionality is limited
Solution Approach 1:
The bulb is segmented into multiple radial zones with light emitting units distributed throughout the volume. This segmentation allows the conventional bulb shape to be maintained externally while internally accommodating multiple light sources that emit light in different directions, thus achieving both aesthetic preservation and improved light distribution
Solution Approach 2:
Multiple light emitting units are nested within the conventional bulb structure, arranged radially around the central axis. The outer bulb envelope maintains the traditional shape for decorative purposes, while the nested internal arrangement of light sources enables omnidirectional light emission without compromising the external appearance
3Illumination intensity
If multiple light emitting sources are arranged radially, then light uniformity in all directions is improved, but device complexity increases
Solution Approach 1:
The radial arrangement structure serves multiple functions simultaneously: it provides mechanical support for the light emitting units, establishes the geometric configuration for uniform light distribution, and facilitates electrical connection through the central axis. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity despite the improved light uniformity
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 achieves high light uniformity in all directions while maintaining the appearance of a conventional bulb, enhancing light output and reducing power consumption.
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 light device including a cover, a light emitter including a first end, a second end, and an intermediate region, and a power board, in which the light emitter includes light sources including first and second light sources adjacent to the first end and the second end, respectively, 5 each of the light sources including first and second contact electrodes, first and second electrode pads electrically connected to at least one of the first and second contact electrodes, respectively, a wavelength converter, and a connection line disposed on an insulation layer and electrically connected to the first or second electrode pad that is electrically connected to the light sources, in which a first distance between the first light source and a first region of the cover is different 10 from a second distance between the second light source and a second region of the cover.