<< LED light | main | Face dress >>

スポンサーサイト

  • 2011.12.30 Friday
  • -
  • -
  • -
  • -
  • -
  • by スポンサードリンク

一定期間更新がないため広告を表示しています


Blue synthesis

LED uses Introduction 1. LED white light visible light spectrum and the relationship.

All the week, the wavelength range of visible light spectrum 380nm ~ 760nm, the human eye can feel the seven colors of light - red, orange, yellow, green, green, blue, purple, but each of the seven colors of light are a A monochromatic light. For example, the red LED made peak wavelength of 565nm.

In the visible spectrum of light is not white,visible light because white light is not monochromatic, but the compound synthesized by a variety of monochromatic light, monochromatic light as the sun light is the synthesis of seven white light, and color TV in white by the three primary colors of light are red, green, blue synthesis.

Thus, to make white light LED, which should include the entire visible spectral characteristics of the spectrum. But to create this performance LED, under the present conditions is impossible. According to one study of visible light, human eyes can see is white,Precious stones at least two light mixing, ie wavelength light (blue light + yellow light) or three-wavelength light (blue light + green light + red light) mode . These two modes of white light, blue light are required, so the intake of white light blue light has become a key manufacturing technology, the current major LED manufacturer chasing the "Blu-ray technology."

Current international control "Blu-ray technology" only a handful of vendors, so the promotion of white LED applications, particularly high-brightness white LED in the promotion of our country there is a process. 2. White LED technology structure and white light. For general lighting, in the process structure, the white LED is usually formed in two ways, first is the use of "Blu-ray technology" and with the formation of white phosphor; second hybrid approach is a variety of monochromatic light.

Both methods have been successfully produce white light devices. The first method to produce white light system shown in Figure 1, the figure sent blue-chip LED GaM (λp = 465nm), it YAG (yttrium aluminum garnet) phosphor package together, when the phosphor excited by blue light After the yellow light, results, blue and yellow mixed to form white light (LED structure constitutes shown in Figure 2). The second method uses different shade of the chip package together, a mixture of colored light produced by white light.

3. White LED lighting,Wearing tribal beads new light source applications. To illustrate the characteristics of white LED, the first look at the current light source used for lighting conditions. Incandescent and halogen, the optical efficiency of 12 ~ 24 lm / W; fluorescent and HID lamps light efficiency of 50 ~ 120 lumens / watt.

The white LED: In 1998, white LED light effect only 5 lm / W, by 1999 had reached 15 lm / W, this indicator is similar to ordinary household incandescent light, and in 2000, the white LED light effect than 25 lm / W, similar to the indicators and halogen. A company predicts that by 2005, LED light efficiency up to 50 lm / W, 2015, LED light efficiency is expected to reach 150 ~ 200 lumens / watt. At that time the white LED current can Daan Pei-level work. This shows that development of white LED


スポンサーサイト

  • 2011.12.30 Friday
  • -
  • 13:27
  • -
  • -
  • -
  • -
  • by スポンサードリンク

コメント
コメントする









この記事のトラックバックURL
トラックバック