Three-Dimensional LED Bulb with Optically Effective Surface Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED incandescent lamp retrofit lamps face challenges in replicating the omnidirectional light distribution of traditional incandescent lamps due to the directional emission of LEDs, which requires complex and costly arrangements or coatings, and often results in shadowing and efficiency losses.
Innovation Solution
A three-dimensionally extended, optically transmissive bulb with an optically effective surface structure that allows for controlled light emission into wide-angle ranges, reducing the need for complex LED orientations and additional reflector or luminescent materials, and enabling improved omnidirectional light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light-emitting diodes are oriented in different directions to approximate omnidirectional light emission, then omnidirectional light distribution is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent transitions from a two-dimensional planar cover plate to a three-dimensionally extended bulb structure. The bulb protrudes axially beyond the mounting plane and incorporates lateral light emission surfaces, adding a third spatial dimension to light emission. This dimensional change enables omnidirectional light distribution from a single LED orientation, eliminating the need for multiple LEDs arranged in different directions.
2Temperature
If a heat sink is used to cool the light-emitting diodes, then cooling efficiency is improved, but shadowing increases and omnidirectional light emission is obstructed
Solution Approach 1:
The patent integrates the heat sink structure within the bulb assembly in a nested configuration. The heat sink is positioned beneath the bulb and LED, with its lateral surfaces forming part of the light-emitting structure. This nesting allows the heat sink to perform its cooling function while its surfaces contribute to lateral light emission, eliminating shadowing and enabling omnidirectional light distribution.
3Ease of manufacture
If the bulb is made planar and two-dimensional to simplify manufacturing, then ease of manufacture is improved, but wide-angle light emission is insufficient
Solution Approach 1:
The patent employs a three-dimensionally extended bulb that protrudes axially from the mounting plane. The bulb includes lateral surfaces that extend in the radial direction, providing additional light emission areas at wide angles. This three-dimensional configuration achieves superior wide-angle light emission compared to planar designs, while the bulb can still be manufactured using standard molding techniques.
4Illumination intensity
If luminescent material coating is applied to the bulb to achieve omnidirectional light emission, then light distribution is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent extracts the light distribution function from the bulb coating and relocates it to the geometric shape and surface structure of the bulb itself. By designing the bulb with specific three-dimensional contours and lateral emission surfaces, the optical function is achieved through form rather than material coating, eliminating the need for elaborate luminescent material application processes.
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 simple, cost-effective, and efficient means of achieving omnidirectional light emission, enhancing light distribution laterally and backward, while simplifying the arrangement of LEDs and eliminating the need for elaborate coatings or reflectors.
Implementation Method 1
Owing to the surface structure, light emerging from the bulb can be directed in a controlled way into predetermined spatial regions
Implementation Method 2
Owing to the surface structure, light emerging from the bulb can be directed in a controlled way into predetermined spatial regions, and in particular deviated in a controlled way
Data Source
AI summary
A bulb for a semiconductor luminous device is provided. The bulb is three-dimensionally extended and includes at least one optically effective surface structure. A semiconductor luminous device may include at least one semiconductor light source and an optically transmissive bulb for transmitting light emitted by the at least one semiconductor light source, the bulb being three-dimensionally extended and comprising at least one optically effective surface structure, wherein the bulb encloses at least one semiconductor light source.