Outline of electrophotographic process
Electrophotographic printers deliver a high quality print at high speed in comparison with other types of printers such as Ink Jet, and are high on printing productivity.
Because of these characteristics, electrophotographic method is widely used in the offices as a printer or a copier.
The electrophotographic process consists of charging, exposure, developing, transferring, and fusing, and prints as follows:
- Charging
- Electric charges uniformly form on the whole surface of the image drum.
- Exposure
- The print pattern is written in dots with light and an electrostatic latent image is formed on the image drum.
- Developing
- Toners are adhered to the latent image.
- Transferring
- The toners adhered to a latent image are transferred to the surface of paper.
- Fusing
- The toner is fused onto paper.
If a light source used in forming an electrostatic latent image on the image drum is laser it is a laser printer, and if LED is used it is a LED printer.
a) Exposure: A latent image is written with LED light on the image drum
b) Developing: Toners are attached to the latent image formed on the image drum
c) Developing: An image is formed with toners.
d) Transferring: The image formed of toners on the drum is transferred to paper.
