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. So whether it is for text or graphical use there will be a noticeable benefit to having a higher resolution display.
- 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.
- Raised Bezel. Many larger touch screens, especially those using infra-red technology, will have a raised edge bezel. This may make cleaning more difficult and in particular not be suitable for touch screens used at an angle or flat as any liquids spilled on them will have nowhere to go.
- 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.
- Mechanical & mounting. Most touch screen monitors or displays are designed to be hung vertically on a wall. If the application is for a table or as an ergonomic review tables such as noted below, it is important that it is designed fit for purpose.
- 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.
Choices about touch screens will inevitably be driven by the requirements of the application, for example whether it is a digital whiteboard being used in education or higher specification products such as made by Volanti for commercial applications, eg the plan review tables referenced below.
Volanti Plan Review Touch Tables
These are high resolution (4K Ultra-HD) touch screens designed to be used for plan review applications, for example architectural and site plans used in construction projects (software used may be something like Bluebeam or similar). For more details on these see: https://www.volantidisplays.com/plan-review-tables.html
Please contact us for pricing or any questions:
By email form: https://www.volantidisplays.com/contact.html
Updated: Jan 2021