An LED display ( LED, English light-emitting diode, or " LED display " ) is a display device based on light-emitting diodes.
One can distinguish three types of LED displays:
History and Overview
The first commercially used LED indicators of the types defined above, 1 and 2 were prepared from monolithic gallium arsenide single crystal by sawing and Contact. It therefore follows keyed advertisements, each consisting of seven LED segments ( seven-segment displays, type 2) were realized, which took place in early 1970s as red lights LEDs use in products such as the first digital watches or calculators.
Later classified red-colored alphanumeric followed consisting of arrayed discrete, punctiform LEDs of type 1
After different color displays by combining different colored LEDs possible were ( additive color mixing of red, green and blue), the need for large displays of the type first emerged in particular in the advertising industry and in sports stadiums In addition there is a detailed description with video wall.
Since the late 2000s, small-format displays with organic light emitting diodes ( OLEDs) are mature enough in thin film technique in smartphones, digital cameras and tablet computers, the usual LC displays (LCDs) to replace part. These are referred to as an OLED display. Also OLED displays are used since the 2010s, in which the activation of each pixel using a thin film transistors in the form of an active matrix (AM) occurs. These are often called AMOLED display ( active matrix organic german light emitting diode), a brand under which the company Samsung sells this technique. It is foreseeable that OLED screens larger format are widely available as LED TVs and computer monitors. So far, there were mainly prototypes from manufacturers including Samsung and LG Display.