LED chip (LED DISPLAY), LED backlight (LED BACKLIGHT) of the main materials, from gallium phosphide (GaP), gallium aluminum arsenic (LED LAMP), LED screen (LED DISPLAY), LED backlight (LED BACKLIGHT) GaAlAs), gallium arsenide (GaAs), gallium nitride (GaN) and other materials, the internal structure of a PN junction, with one-way conductivity.
1, the role of the chip: the chip is the main component of Lamp material, is the light of the semiconductor material.
2, the composition of the chip: the chip is the use of gallium phosphide (GaP), gallium aluminum arsenide (GaAlAs) or gallium arsenide (GaAs), gallium nitride GaN) and other materials, its internal structure with one-way conductivity.
3, LED chip material
Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ |
B | C | N | O | |
Al | Si | P | S | |
Zn | Ga | Ge | As | Se |
Cd | In | Sn | Sb | Te |
Hg | Ti | Pb | Bi | Po |
Note: Group III elements for the P-type material, Ⅴ elements for the N-type material, the chip material is mainly Ⅲ, Ⅴ group of compounds.
The pad of the chip is generally a gold pad or an aluminum pad. The shape of the pad is round, square, cross and so on.
The color of the chip depends on the wavelength (HUE). The classification of common visible light is roughly dark red (700nm), dark red (640-660nm), orange (615-635nm), amber (600-610nm), yellow 580-595 nm), yellow-green (565-575 nm), pure green (500-540 nm), blue (435-490 nm), purple (380-430 nm). White light and pink light is a light mixing effect. The most common is the combination of blue + yellow phosphor and blue + red fluorescent powder.