Touch recognition enables brightness dimming and switching of OLED panels
OLEDs are area emitters where the light is generated directly on large areas. In combination with the energy efficient light generation, an OLED is only slightly heated during operation. So an OLED panel can always be touched without being uncomfortably hot. However, the area of an OLED has another advantage. It enables the capacitive touch detection. For this purpose, the large-scale ITO (indium tin oxide) electrode of the OLED is used. Once a finger touches the OLED, this can be detected by an electronic circuit and the result can be used for example for controlling the brightness of the OLED itself. The standard structure of the OLED must therefore not be changed. In addition, the use of several separate OLEDs with this touch function can also be imagined, thus realizing different switching functions for other devices. This makes self-luminous switching elements for general lighting or automotive applications possible.