spectrum
Indicates the distribution of the intensity of light with respect to the wavelength of light. The spectrum of the LED is generally a monochromatic LED. For example, the blue LED has a peak distribution at a peak wavelength of 470 nm, and the ultraviolet region having a short peak wavelength and a green region having a long peak wavelength are the measurement limits of the intensity of light. The spectrum of incandescent lamps, whose luminous intensity is widely distributed in the blue field of more than 400 nm to the near-infrared field of more than 700 nm, can also be observed in the ultraviolet field and the infrared field. In the case of a fluorescent lamp, the portion of the luminescent wavelength of the phosphor used in combination is the peak of the spectrum.
Compared to the spectral peaks of ordinary red, green and blue LEDs, the spectrum of white LEDs is quite different. For example, the blue and yellow fields have two peaks of luminous intensity, or three peaks in the blue, yellow, and red fields, and even more peaks. This is because the white light of the white LED is obtained by combining light of a plurality of wavelengths. For example, when blue LEDs and yellow phosphors are combined, peaks appear in the blue and yellow fields. In addition, the peak of the luminous intensity based on the blue LED is sharp, and the peak based on the phosphor is relatively flat.
When LEDs are used for liquid crystal panel backlights, the ideal situation is that the spectrum of the LEDs peaks in the three areas of red, green and blue. This is because the light of the LED will eventually be output to the outside via the color filters (red, green, blue) of the liquid crystal panel.
When three peaks of luminous intensity are obtained, there are methods of using three kinds of LEDs of red, green, and blue, and a method of using a white LED that can obtain three peaks by improving the phosphor material.
The luminescence spectrum is very different
The luminescence spectra of blue LEDs and YAG-based phosphors, blue LEDs and ZnSe single crystal substrates, and white LEDs such as ultraviolet LEDs and RGB phosphors are compared with fluorescent lamps and natural light. Although all are white, the luminescence spectrum is quite different.
On the other hand, when LEDs are used in ordinary lighting fixtures, white LEDs whose spectrum is widely distributed in the field of visible light are more popular. The reason is that when the light of the spectrum of the sunlight illuminates the object, the color of the object is close to that when the natural light is irradiated.
It can be equipped with different type of storage battery such as lead acid battery, Nickel Cadmium Battery, silver zinc battery, Lithium Ion Battery and other storage batteries, providing various output voltage classes.
Built-in storage battery and charger, equipped with the function of over-charge and over-discharge protection and capacity display. It is used as working power supply for lightings, communications, laptops, and special instruments of emergency working, field working, press interviews, special vehicles and other fields.
48V Dc Power Supply,Universal Power Supply,Power Supply 500W,Electrical Load Power Supply
Xinxiang Taihang Jiaxin Electric Tech Co., Ltd , https://www.agvchargers.com