LED printers - principle of operation: types and capabilities of printers

LED printing began to be used in the 80s. Technology has replaced expensive laser equipment. Printing is done using the photographic method. The difference from laser devices is in the method of illumination of the sensitive drum. In LED models, the ruler is located along the shaft surface, providing uniform flow distribution. Due to the design features, this technique is more reliable than analogues. Such printers can provide high image quality.

How the LED printer works

The principles of operation of LED equipment are similar to laser models.

Device

• Photoed is the basis of the design.
• On its surface are located semiconductors that respond to light.
• When light comes from diodes resistance changes on a site and the primary image on paper appears.
• Next, the coloring particles toner attracted by the opposite charge. And under the influence of high temperatures they fix their position.

REFERENCE. The material of the sensitive shaft affects the formation of charge. Most often, models with a negative charge are used.

The main stages of printing

• Paper is fed into the device using pinch rollers. In the process, the sheet is aligned and prepared for image reproduction.
• In parallel, the accumulation of charge on the drum. For this, a corotron or a charging shaft is used.
• The LED strip begins to light up in areas where you need to apply the image. Control is carried out using the main control unit.
• After that, the toner is attracted to the highlighted areas. To fix it, use high pressure and temperature.
• The result is a sheet with a finished image that is resistant to external influences.

Color Printing Methods

The color LED printer prepares the image before starting printing. With the help of a raster processor, four primary colors are divided.

IMPORTANT. For printing each color, separate cylinders are used. If necessary, shades are mixed.

• Single pass method used in modern models. Processing and application of the image takes place in one pass along the shafts.
• Multi pass technique contains an intermediate section on which the image is applied individually and then transferred to paper.

Types of LED printers and their features

All printing devices can be divided into several groups. They include monochrome and color equipment, as well as spherical toner devices. The main difference is print medium structure. Under the influence of high temperatures, the core of the toner elements first begins to melt. The resulting mass easily soaks the paper.

ATTENTION! Spherical particles can make sharper contours of points. Therefore, image quality is getting better.

Features of LED Printers

Monochrome

This equipment has a simple design. Due to the fact that the cartridge and the sensitive drum are separated, it is possible to replace the elements separately.

LED

These printers are compact in size and lower in cost. The devices are safe to print and do not emit noise.

The design of the printer contains 250010000 diodes, depending on the resolution of the product. LED lamps have a longer life than laser and lenses in similar models.

Colored

These printers allow you to print high-quality image of high resolution. This ensures a more accurate transmission of text and small details.

Apply 4 basic colors: yellow, black, blue and raspberry shade. Processing speed varies by model.

REFERENCE! The limit value is 36 A4 sheets per minute. The maximum monthly load should be no higher than 150,000 copies.

Due to the lack of rotating mechanisms, LED printers are more reliable.

This technology is an effective alternative to laser printing. Printers are easy to use and do not require specialized maintenance. Under the right operating conditions, the products will provide high-quality printing for a long period.