Classification of Printer
A printer is an external hardware output device that takes digital data (text and images) from a computer and converts it into a physical “hard copy” on paper or other materials.
Main Types of Printers
1. Impact Printers
These printers function by physically striking an inked ribbon against the paper to create characters or images.
- Dot Matrix Printer: Uses a grid of tiny pins to strike a ribbon, forming characters made of dots. They are often used for multipart forms like invoices.
- Daisy Wheel Printer: Uses a wheel with pre-formed characters. Similar to a typewriter, it strikes the ribbon to print a single character at a time.
- Line Printer: Prints an entire line of text at once, making it much faster than character-based impact printers.
2. Non-Impact Printers
These modern printers do not physically touch the paper to transfer ink. They are generally quieter and offer higher-quality output.
- Laser Printer: Uses a laser beam and heat to fuse powdered ink (toner) onto the page. They are known for high speed and crisp text.
- Inkjet Printer: Sprays microscopic droplets of liquid ink through tiny nozzles directly onto the paper. These are versatile and popular for home use and photo printing.
- Thermal Printer: Uses heat to produce images on special heat-sensitive paper. These are commonly used for retail receipts and shipping labels.
- 3D Printer: A unique type that creates three-dimensional objects by layering material (like plastic or resin) based on a digital model.