Compared with the Effects of Two Measurement Methods on the Luminescent Properties of LED Phosphors
Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2017, Vol 12, Issue 3
Abstract
Accurate measurement of LED phosphor performance parameters, the traditional test method commonly used is to use a laser or xenon lamp as an incident light source, which is not only expensive, but also the results are not accurate. While the use of LED chips as its incident light source, is not only cheap, but also closer to the real life of the application. And in practical applications, LED chip and phosphor are usually packaged and measured, but the packaging method is complex, the packaging technology is not advanced, which directly affect the optical performance of white LED.As a result, in this paper, another way with the blue LED chip directly stimulate the phosphor and measure its luminous performance, and comparative analysis of the two different ways, Concluded as follow: When using the blue LED directly stimulate the yellow phosphor test method, the measured phosphor external quantum efficiency and energy efficiency is higher, and the luminous performance of the phosphor is better, and the application of the industry has played a reference role.
Authors and Affiliations
Zhaoyang Zhang, Pingfan Ning
Keywords
Related Articles
- EP ID EP387145
- DOI 10.9790/1676-1203011419.
- Views 131
- Downloads 0
Closed Loop Control of Composite Dc-Dc Converter for Electric Vehicle
In a electric vehicle powertrain, a boost dc-dc converter enables reduction of the size of the electric machine and optimization of the battery system. Design of the powertrain boost converter is challenging because the...
Lightning Protection as Per IEC 62305 & Key Factors of Installation, Maintenance
The basic interest of this paper is to discuss and insist on the importance of protection devices / system and to regulate the overall process including selection, installation and upkeep of the lightning protection syst...
An Approach Using Sudden Change in Geometrical Shape of a Sample for Fabricating Micro Materials Utilizing Electromigration
The utilization of electromigration of induced micro materials in passivated aluminum films was investigated. The experimental sample was a passivated polycrystalline Al line with a hole using sudden change in geometrica...
Generalized PWM Control of Dual Inverter Fed Induction Motor Drive
A simplified generalized pulse width modulation (GPWM) algorithm is proposed to obtain various continuous and discontinuous PWM algorithms for a four level inverter topology. Induction motor both sides are fed with a thr...
Optimal Reactive Power Compensation in Transmission Networks By TCSC Using Particle Swarm Optimization
Increased demand for electrical energy and free market economies for electricity exchange, have pushed power suppliers to pay a great attention to quality and cost of the latter, especially in transmission networks. To r...