Refreshable Braille display

A refreshable braille display is a device that helps people who are blind or visually impaired to read and write text using braille. Braille is a system of raised dots that can be felt with the fingers and represents letters, numbers, and other symbols.

The display has rows of small pins, each representing a braille dot. When text is sent to the display, the pins rise and fall to create the braille letters and words. This allows the user to read the text with their fingers just like a sighted person would read with their eyes.

The display can also be used to write braille by pressing down on the pins in a specific order to create the desired letters and words. This allows the user to communicate in braille with others who can also read and write braille.

Think of it like a magic board that shows you letters and words in a special way that you can touch and feel with your fingers. It helps people who can't see to read and write just like you do with your eyes.