Electronic visual display
An electronic visual display is a display device that can display images, video, or text that is transmitted electronically. Electronic visual displays include television sets, computer monitors, and digital signage. They are ubiquitous in mobile computing applications like tablet computers, smartphones, and information appliances. Many electronic visual displays are informally referred to as screens, and those that also contain some means of touch input are called touchscreens.
Starting in the early 2000s, flat-panel displays began to dominate the industry, as cathode-ray tubes were phased out, especially for computer applications. Starting in the mid 2010s, curved display panels began to be used in televisions, computer monitors, and smartphones.
Types
There are various technologies used for electronic visual displays:- Liquid crystal display including LED-backlit LCD
- LED display
- *OLED display
- *AMOLED display
- Plasma display
- Quantum dot display
- Electroluminescent display
Additionally, CRTs were widely used in the past and microLED displays are under development.
Classification
Electronic visual displays present visual information according to the electrical input signal either by emitting light or, alternatively, by modulating available light during the process of reflection or transmission.Display mode of observation
Electronic visual displays can be observed directly or the displayed information can be projected to a screen. This usually happens with smaller displays at a certain magnification.A different kind of projection display is the class of "laser projection displays", where the image is built up sequentially either via line by line scanning or by writing one complete column at a time. For that purpose one beam is formed from three lasers operating at the primary colors, and this beam is scanned electro-mechanically ) or electro-acousto-optically.