Touch-screen Features and Why They are Important

The following briefly describes a few touch screen features and explains why they are important:

  • Clarity & Brightness. Many touch technologies will block some of the light from the display, however while this might reduce the effective brightness of the LCD display a good quality display has plenty of brightness to allow for this.
  • 4K vs Full-HD. A higher resolution is a very important benefit on larger displays as touch-screen users will be within arms reach of the display, in addition, many graphical applications now support 4K resolution.
  • Touchpoints. This notes how many simultaneous touches the display can detect. For most applications, two simultaneous touchpoints are all that is needed as this covers zoom and two-finger tap. Some applications may make use of three-finger functions otherwise it is really only if more than one person is going to use the screen at the same time.
  • Touch resolution. With large touch screen displays the resolution of the touch sensor can be as important as the image resolution. If the touch resolution is low it will decrease touch accuracy.
  • Latency / Lag / Touch response. This is an issue most easily seen when drawing a line and is indicated by how far the line follows behind the finger or stylus. Note that the touch screen, the PC and the display can all be factors affecting this.
  • Refresh rate. This is how fast the display refreshes, the baseline is 60Hz (60 times per second) though 120Hz is quite common now (Volanti’s 65″ and 84″ touch displays are 120Hz). A faster refresh rate will give more detail to motion on the display and help reduce latency.
  • Response time. This is how fast the pixel elements in the LCD display switch on/off (normally measured from gray to gray). Faster is better as it provides crisper images when there is motion on the display, slow response time can result in blurring or smearing of motion.
  • HID compatible. This enables plug-and-play compatibility with operating systems like Windows (versions 7, 8 & 10) eliminating the need for special drivers to be installed.
  • Ball drop test. This is an indication of the strength of the cover glass, it literally provides a rating for the ability of the glass to withstand a metal ball being dropped on it.

Please contact us for more in depth information about any of the above.