Omnidirectional LED Lamp Light Guide with Dual Diffusing Surfaces
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Solution Overview
Problem
Conventional LED lamps struggle to replicate the 360° illumination pattern and aesthetic appearance of incandescent light bulbs, leading to unsuitable replacements in various applications and low user acceptance due to altered lighting conditions and appearance.
Innovation Solution
An LED lamp design incorporating a light guide that diffuses light from an LED unit to create a wide, omnidirectional illumination pattern, using a combination of first and second diffusing surfaces to mimic the appearance of a traditional incandescent bulb, while allowing for efficient cooling and aesthetic alignment with incandescent bulbs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional LED lamp uses a base part to house electronics and multiple LEDs with different orientations, then the illumination pattern can cover more directions, but the base part becomes comparatively large and prohibits light from being radiated in directions substantially towards and beyond the fitting
Solution Approach 1:
The patent transitions from a planar light distribution (2D) to a three-dimensional omnidirectional light distribution (3D) by introducing a spherical or substantially spherical light-diffusing element that surrounds the LED unit, enabling light to be emitted in all directions including towards and beyond the fitting
2Ease of manufacture
If known LED lamps use a base part that is comparatively large, then electronics can be housed, but light radiation in directions substantially towards and beyond the fitting is prohibited
Solution Approach 1:
The patent integrates the electronics housing within the spherical light-diffusing element itself, nesting the electronic components inside the transparent or translucent sphere, thereby eliminating the need for a separate large base part and enabling omnidirectional light radiation
3Use of energy by moving object
If LED lamps have a substantially different appearance compared to filament based lamps, then LED technology benefits are achieved, but user acceptance is low in applications where direct view of the light bulb is desired
Solution Approach 1:
The patent uses a transparent or translucent spherical envelope that visually replicates the appearance of traditional incandescent light bulbs, allowing users to see through the envelope and perceive the familiar bulb shape and internal LED structure, thereby maintaining aesthetic acceptance while providing LED energy efficiency
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 LED lamp achieves a 360° illumination similar to incandescent bulbs, maintains a traditional aesthetic appearance, and allows for efficient cooling, enhancing user acceptance and operational longevity.
Implementation Method 1
a light guide arranged to receive a light beam from the LED unit and guide the light beam towards a first light diffusing surface
Implementation Method 2
providing a diffused light beam; the light guide can emit light covering a comparatively large spatial area
Implementation Method 3
the light guide further comprising a second light diffusing surface facing the first light diffusing surface for diffusing at least part of the diffused light beam
Data Source
AI summary
An LED lamp is described, the LED lamp comprising an LED unit, e.g. provided on a base, in an embodiment, a fitting for contacting a power supply, and a light guide arranged to receive a light beam from the LED unit and guide the light beam towards a first light diffusing surface thereby providing a diffused light beam and whereby the light guide further comprises a second light diffusing surface facing the first light diffusing surface for diffusing at least part of the diffused light beam. The LED lamp as described enables to provide an omnidirectional light distribution, comparable to the light distribution of a conventional filament based light bulb.