Question

По какому ФИЗИЧЕСКОМУ принципу работают принтеры:лазерные, матричные

Answer 1

лазерные принтеры нагревают порошок и сыпят его на бумагу и прижимают барабаном

матричные через красящую ленту ударяют иголками сдвигают головку, когда головка доходит до края то бумага прокручивается на одну строку вниз, и процедура повторяется

Answer 2

Physical Principles of Laser Printers:

Laser printers operate based on the principle of electrophotography, also known as xerography. Here's a brief explanation of how laser printers work:

1. Charging: The process starts with a photosensitive drum, which is initially given a uniform positive charge using a corona wire or roller.

2. Exposure: A laser beam is then used to selectively discharge areas on the drum corresponding to the image to be printed. The laser beam is controlled by the digital data sent from the computer.

3. Development: The discharged areas on the drum attract toner particles, which are negatively charged. The toner particles are transferred from the toner cartridge onto the drum, forming an image.

4. Transfer: The toner image on the drum is then transferred onto the paper by applying a strong electric field between the drum and the paper. This process is known as electrostatic transfer.

5. Fusing: Finally, the toner particles on the paper are fused or melted onto the paper using heat and pressure. This ensures that the image becomes permanent and does not smudge.

Physical Principles of Dot Matrix Printers:

Dot matrix printers work based on a different physical principle called impact printing. Here's a brief explanation of how dot matrix printers work:

1. Print Head: Dot matrix printers have a print head that contains a matrix of pins. These pins can be individually controlled to strike an ink ribbon against the paper.

2. Ink Ribbon: The ink ribbon is placed between the print head and the paper. It contains inked characters that are transferred onto the paper when the pins strike the ribbon.

3. Printing Process: When a character needs to be printed, the print head moves across the paper horizontally, and the appropriate pins are activated to form the desired character. The pins strike the ink ribbon, which then transfers ink onto the paper, creating dots that form the characters.

4. Impact and Noise: The impact of the pins against the ink ribbon and paper creates noise, which is characteristic of dot matrix printers. The number of pins in the print head determines the print quality, with higher pin counts resulting in better resolution.

5. Advantages and Disadvantages: Dot matrix printers are known for their durability and ability to print on multipart forms. However, they are relatively slow and produce lower-quality prints compared to laser printers.

Please note that the above information is based on search results from You.com