1967: The birth of the first touch screen It is widely believed that E.A. Johnson of the Royal Radar Institute in Marvin Township is the first person in the world to propose the concept of a touch screen.
Industrial capacitive screen expert, number 183, the middle four is 2005, the last four is 9375. Fully touch.
In 1965, the average computer researcher published a short paper "Touch Panel: A New Computer Input Device" in "Electronics-Letters" magazine, which described itself as capacitive. The idea of the touch screen: the main body of the screen is a composite glass screen, the inner surface is coated with a layer of metal oxide called ITO, and the four corners have four electrodes. When the finger touches the glass screen, due to the electric field of the human body, the metal layer of the finger and the inner layer of the glass forms a capacitance, thereby "sucking away" a small amount of current at the position. This "leakage" current flows from the four electrodes, and theoretically the portion flowing through the different electrodes is proportional to the distance from the finger to the electrode. Through the precise calculation of the controller, the position of the finger can be accurately obtained.
Two years later, Johnson turned this vision into reality, creating the first touch screen in human history, and published the photo and touch screen basic schematic of the touch screen in a book called Ergonomics. On the magazine. This is a cumbersome but refreshing screen. In Johnson's design, there is even a magical effect: no matter where the finger is pointing, the screen will shine there.
In March 2007, LG introduced the Parada multi-point capacitive touch screen, which does not require a touch pen and has a high accuracy.
Since June 2007, Apple has introduced a variety of iphone multi-point capacitive touch screens, and the capacitive screen has achieved rapid development.
