LED Package Layout for Adjustable Color Temperature Bulbs
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Solution Overview
Problem
Conventional incandescent lamps have short lifespans and low energy efficiency due to heat generation, making them unsuitable for long-term use, whereas traditional LED technologies lack the ability to efficiently regulate color temperature and directional light emission.
Innovation Solution
An LED package set comprising a substrate with a first and second LED package, each with a different color temperature, and a resistor connected in series and parallel, allowing for adjustable color temperature emission by varying current distribution, and an LED bulb design that incorporates this package set for improved light distribution and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If incandescent lamps use filaments to generate light through temperature radiation, then light emission is achieved, but energy efficiency becomes extremely low and lifespan becomes short due to heat generation
Solution Approach 1:
The patent replaces the thermal radiation mechanism of incandescent filaments with LED electroluminescence technology. LED chips convert electrical energy directly into light through electroluminescence, eliminating the need for high-temperature heating and thereby dramatically reducing energy waste as heat while maintaining high energy efficiency
Solution Approach 2:
The patent employs wavelength conversion portions with different phosphor materials to change the color temperature parameter of emitted light. By selecting phosphors with different conversion characteristics, the system achieves varied color temperatures (warm white, natural white, cool white) while maintaining the energy-efficient LED light generation mechanism
2Adaptability or versatility
If traditional LED technology is used, then energy efficiency and lifespan are improved, but the ability to regulate color temperature and control directional light emission is insufficient
Solution Approach 1:
The patent divides a single LED light source into multiple independent LED packages, each containing LED chips that emit light at different color temperatures. This segmentation allows independent control of each package through separate resistors, enabling flexible color temperature regulation and directional light emission without requiring a complex centralized control system
Solution Approach 2:
The patent combines multiple LED packages with different color temperature characteristics into a single integrated LED module. By merging these packages on one substrate and connecting them through resistors to a common power supply, the system achieves versatile color temperature regulation and directional emission capabilities while maintaining relatively simple overall structure
3Adaptability or versatility
If multiple LED packages with different color temperatures are connected in parallel, then color temperature regulation becomes possible, but current distribution control becomes difficult
Solution Approach 1:
The patent introduces resistors as intermediary elements between the power supply and each LED package. These resistors act as current control mediators, allowing simple adjustment of current distribution to different LED packages by changing resistor values, thereby achieving color temperature regulation through easy-to-operate resistance adjustment rather than complex electronic control
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 high economic efficiency, long lifespan, and adjustable color temperature with even directional light emission, enhancing the performance of LED lighting systems.
Implementation Method 1
a first LED package disposed on the substrate and including at least one first LED chip, a second LED package disposed on the substrate and including at least one second LED chip
Implementation Method 2
The first LED package may include a first wavelength conversion portion covering the at least one first LED chip, and the second LED package may include a second wavelength conversion portion covering the at least one second LED chip
Implementation Method 3
a resistor disposed on the substrate, connected to the first LED package in series, and connected to the second LED package in parallel
Data Source
AI summary
A light emitting device including a first light source including a plurality of first light emitting structures and a first wavelength converter and configured to emit a first light, a second light source including a second light emitting structure and a second wavelength converter and configured to emit a second light, and a resistor member connected to the first light source and configured to distribute current to the first light emitting structures, in which a color temperature of the first light is configured to be higher than that of the second light, and the first light and second light are configured to have different light intensity.