LED lighting applications and prospects
1. Summarize According to statistics, Shanghai expo park used 1.03 billion LED chip，LED chips appear in the indoor and outdoor lighting, landscape decoration, signs and the information display screen of the expo site. World expo venue in indoor lighting source using about 80% the LED green light source, through the deduction of creative concept design and […]
The experiment of IP waterproof test grades
The experiment of IP waterproof test grades (1) The IPX 1 Method name: Vertical drip water test Testing equipment: Drop test device Sample to place: According to the normal work of the sample position put on the 1 r/min rotation sample, the top sample to drop water distance not far more than 200 mm Test […]
IP protection grade definition
IP means Ingress Protection. IEC IP protection grade is the key to the electrical equipment safety. IP protection grade system provides a method to analyze electrical equipment and the degree of dustproof, waterproof, and collision, this system has won the acceptance of most European countries, the IEC(International Electro Technical Commission) appointed the draft, and announced […]
The qualitative analysis of the spectrometer
The qualitative analysis of the spectrometer: Due to the atoms structures of each element are different, under the action of light source, can produce own characteristic spectrum. If a sample through by excitation spectrum appears several elements’ spectral line, it’s proved that there are several elements in the samples. This analysis method is called a […]
How to choose LED light source
With the development of the market, as a consumer, choose LED is still to be calm, scientific analysis, choose the best cost-effective light source and lamps and lanterns, the following introduce the basic performance of several kinds of LED: 1、Brightness: LED brightness is different, the price is different. Used for LED lamps and lanterns should […]
The actual energy efficiency and luminous efficiency of white LED(Part 2)
When white LED operating, the highest ideal effectiveness is η=39.5%. But phosphors and window materials absorption is far more than 5% analysis hypothesis, when analysis，it isn’t included the loss of carrier impurities and defects in the chip, internal quantum efficiency and the extraction yield were estimated on the high side. Especially under operating state, chip […]
The actual energy efficiency and luminous efficiency of white LED(Part 1)
Any kinds of illuminants are bound to produce a variety of energy loss when convert electrical energy into light energy, conversion efficiency usually between 20% ~ 40%, it is difficult to achieve 50%. So basically can determine any light source, if the color rendering index is no lower than 80, the light will be no […]
