A capacitive touch screen consists of a glass panel with a capacitive (charge
storing) material coating its surface. Circuits located at corners of the screen
measure the capacitance of a person touching the overlay. Frequency changes are
measured to determine the X and Y coordinates of the touch event.
Capacitive type touch screens are very durable, and have a high clarity.
They are used in a wide range of applications, from restaurant and POS use to
industrial controls and information kiosks.
|
Advantages |
Disadvantages |
- High touch resolution
- High image clarity
- Not affected by dirt, grease, moisture.
|
- Must be touched by finger, will not work with any
non-conductive input
|
Touchscreen Specifications |
Touch
Type: |
3M ClearTek
Capacitive |
Cable
Interface: |
PC Serial/COM
Port (9-pin) or USB Port |
Touch
Resolution: |
1024 x
1024 |
Activation
Force: |
less than 3
ounces |
Light
Transmission: |
88% at 550 nm
wavelength (visible light spectrum) |
Durability
Test: |
100,000,000 plus
touches at one point |
Temperature: |
Operating: -15°C
to 50°C Storage: -50°C to 85°C |
Humidity: |
Operating: 90% RH
at max 40°C, non-condensing |
Chemical
Resistance: |
The active area
of the touchscreen is resistant to all chemicals that do not affect glass, such
as: Acetone, Toluene, Methyl ethyl ketone, Isopropyl alcohol, Methyl alcohol,
Ethyl acetate, Ammonia-based glass cleaners, Gasoline, Kerosene, Vinegar
|
Regulations: |
UL, CE, TUV,
FCC-B |
Software
Drivers: |
Windows XP, 2000,
NT, ME, 98, 95, 3.1, DOS, Macintosh OS, Linux, Unix (3rd Party) | |