How it works: the new technologies of touch screens-DST


The working principle of touch screens with DST-technology is in its ability to calculate the coordinates of the touch by interpretation of mechanical oscillations (waves) generated by touching the surface of the screen. Among the advantages of DST technology is the ability to create a larger touch screen as well as a fast, reliable and accurate data entry device. An important feature of the DST touch screen is insensitivity to pollution, scratching and the impact of "static electricity". In other words the Panel does not respond to the constant clicking in one point and recognizes only dynamic input.

The above mentioned features of DST technologies suggest that it can be used in applications such as interactive information systems, electronic signs, virtual catalogs, electronic buy and sell boards, and presentation systems for conference rooms and classrooms.

A brief description of the technology:

Signal dispersion technology (DST)

Materials used:

Glass substrate, piezoelectric transceivers

Principle of operation:

- Touch creates wave vibrations inside of the glass substrate.

- Waves inside the substrate spread from the point of touch to the edges of the screen and is determined by piezoelectric sensors situated in the corners of the screen.

- Electronics computes the coordinates of the touch.


- The technology is insensitive to surface contamination.

- The work is not affected by static objects.

- Touch can be done with a finger, gloved hand, or stylus.

- Light output is more than 90%.

- It is possible to design the monitor without a front frame.


- There are few manufacturers of screens with this technology.

- Only one touch.

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