Why computer monitors are not sensitive to the touch


From the tube to the high-resolution flat screen

In the 1980s and 1990s, both the display and transmission standards for PC monitors were continuously developed. However, the norms of television broadcasting hardly changed, which caused monitors and televisions to diverge. CRT monitors were used in computers until the early 2000s. These were finally available with a screen diagonal of up to 56 centimeters and scored points with a fast response time and good black values. However, due to their construction, the monitors were not only heavy and unwieldy, they also used a comparatively large amount of energy.

No wonder then that with the advent of flat screens they were quickly replaced by these. These monitors, which work with liquid crystals, made it possible to have a much flatter design. The new technology was therefore essential for the development of both handy laptops and PC screens with large screen sizes. The step to flat screens also took place in televisions, in most cases initially with plasma devices. Another important step was the introduction of a common transmission standard, the High Definition Multimedia Interface (HDMI) more and more used as a connection for televisions and monitors.

Touchscreens - touch-sensitive monitors

Even with the tube monitors there were models that could be used with the aid of the finger or an input pen. However, the technology only made it possible to use larger buttons. The development of flat screens opened up numerous possibilities to build touch-sensitive monitors that could be controlled much more precisely. These are mainly used for portable devices such as smartphones and tablet PCs.

The development of common transmission standards, for which wireless versions are also available, also enables better compatibility of the devices with one another. So it is not only possible to connect the PC to the television or projector, the picture of the smartphone can also be displayed on many TV sets and monitors.