LED optical tube lighting principle

　　The end voltage of the PN knot constitutes a certain potential barrier. When the position of the forward bias voltage decreases, most of the carrier flows in the P area and the N area spread to the other party. Because the electronic migration rate is much greater than the empty acupoint migration rate, a large number of electronic spreads to the P area, forming an injection of a minority carrier of the P area. These electrons are compounded with the cave on the price, and the energy obtained during composite is released in the form of light energy. This is the principle of PN glowing.

　　The LED provides a large monochrome light with a large semi -width. Because the energy gap of the semiconductor decreases with the temperature, the peak wavelength it emits increases with the rise of temperature, that is, the spectrum redly moves, the temperature coefficient is +2 is +2 ~ 3A/. LED luminous brightness L is approximately proportional to the positive current. The current increases, and the brightness brightness is approximate. In addition, the brightness of the light is also related to the environmental temperature. When the environmental temperature is high, the compound efficiency decreases and the luminous intensity is reduced.

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