• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

Gentle emitting diodes, generally called LEDs, are real unsung heroes in the electronics world. They do many different jobs in all kinds of units. They form numbers on digital clocks, transmit info from remote controls, light up watches and inform you when your appliances are turned on. Collected collectively, they can kind photographs on a jumbo tv display or illuminate a site visitors light. Mainly, LEDs are simply tiny mild bulbs that fit simply into an electrical circuit. But not like incandescent bulbs, they do not have filaments that burn out, they use much less electricity, and so they do not get particularly scorching. They're illuminated solely by the movement of electrons in a semiconductor material, and so they final simply as long as a standard transistor. The life span of an LED surpasses the quick life of an incandescent bulb by hundreds of hours. As a result of of these benefits, tiny LEDs are considered one of the preferred applied sciences used to light LCD TVs.

In incandescent bulbs, the sunshine-production course of involves producing a whole lot of heat (the filament must be warmed to illuminate). This power is totally wasted until you're utilizing the lamp as a heater, because an enormous portion of the available electricity isn't going towards producing seen light. LEDs generate little or no heat, comparatively talking. A much larger percentage of the electrical energy goes directly to generating gentle, which cuts down the electricity demands considerably. Per watt, LEDs output more lumens (or portions of seen mild) than regular incandescent bulbs. Light emitting diodes have a better luminous efficacy (how effectively electricity is converted to seen light) than incandescents - a 60-watt incandescent bulb can generate between 750-900 lumens, however you can get the identical output from a LED bulb using solely 6-8 watts. And that same LED bulb can final 25,000 hours, however the 60-watt incandescent is barely more likely to mild up for about 1,200 hours. Until just lately, LEDs have been too expensive to make use of for many lighting applications as a result of they're built round advanced semiconductor EcoLight material.

The price of semiconductor gadgets plummeted after the year 2000, nevertheless, making LEDs a extra price-efficient lighting possibility for EcoLight products a variety of conditions. While they could also be dearer than incandescent lights up front (about $5 versus $1 for incandescent bulbs), their decrease cost in the long run could make them a greater purchase. Several corporations have begun selling LED gentle bulbs designed to compete with incandescent and compact fluorescents that promise to deliver lengthy lives of vivid mild and superb power efficiency. In this article, we'll look at the know-how behind these ubiquitous blinkers, illuminating some cool ideas of electricity and gentle in the method. How Can a Diode Produce Light? LED Mild Bulbs vs. What is a Diode? A diode is the simplest type of semiconductor system. Broadly speaking, a semiconductor is a fabric with a varying capacity to conduct electrical current. Most semiconductors are manufactured from a poor conductor that has had impurities (atoms of one other material) added to it.

The process of adding impurities is known as doping. Within the case of LEDs, the conductor material is usually aluminum-gallium-arsenide (AlGaAs). In pure aluminum-gallium-arsenide, EcoLight all the atoms bond perfectly with their neighbors, leaving no free electrons (negatively charged particles) to conduct electric present. In doped material, extra atoms change the balance, EcoLight either including free electrons or creating holes where electrons can go. Either of these alterations make the fabric extra conductive. In N-type materials, EcoLight free electrons transfer from a negatively charged space to a positively charged space. A semiconductor with further holes is called P-sort materials, because it effectively has extra positively charged particles. Electrons can leap from hole to gap, moving from a negatively charged area to a positively charged area. In consequence, the holes themselves appear to move from a positively charged space to a negatively charged space. A diode consists of a section of N-sort materials bonded to a piece of P-kind material, with electrodes on each finish.