At present, LED printing and laser printing on the market are the two core technologies of digital printing and imaging. The printing principles of the two are basically the same, basically adopting the electrophotographic printing method, which can be divided into four stages. There are charging and exposure around the photosensitive drum, and another part is the four stages of development and printing. Among them, only the exposed part is divided into the so-called LED and laser, which are exactly the same in other places.
LED technology and laser printing technology
The technology used in LED printers is a set of LEDs for scanning sensitization. LED sensitization uses dense LED arrays as light emitters to convert electrical signals of data information into optical signals and then emit them onto the drum. . The laser printing imaging technology transmits all the data signals to a transmitting device, and the emitted light is reflected by the rotating polygon mirror and imaged on the photosensitive drum. As a result, the imaging process of LED technology is significantly simpler than the laser imaging process, and because of this, LED printing technology is generally slightly faster than laser printing.
The toner cartridge of an LED printer plays an important role in fixing imaging, which can affect the print quality. It can be divided into several parts: the corresponding effects of toner, photosensitive drum, charging roller, magnetic roller and scraper are as follows:
1. As a deposit of direct melting on the printing medium, the scientific ratio of the main components plays a decisive role;
2, the photosensitive drum as the core component of the exposure imaging, its photographic performance is good or bad, it also plays a decisive role in the blackness of the printed product;
3, the charging roller is also known as the rubber roller, it is prepared for the exposure imaging, it will give the photosensitive drum the result of the quality, it will directly affect the exposure degree, thus affecting the blackness of the printed product; 4, the magnetic roller as the whole The direct participant of the primary transfer plays two roles: adsorbing the toner particles and charging the toner particles;
5. The scratched area on the surface of the magnetic roller is not sticky, so there will be blanks in the relevant area of ​​the corresponding printed product. In addition, when the magnetic roller prints for 3 cycles, the aging layer has appeared on the surface, which also affects the charging effect of the magnetic roller to the toner, thereby directly affecting the amount of toner transferred from the magnetic roller to the surface of the photosensitive drum, that is, Directly affects the blackness of the printed product;
6. The main function of the powder silo scraper is to control the number of toner particles on the surface of the magnetic roller. The auxiliary function is to charge the carbon powder particles, so it also directly affects the blackness of the printed product.
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