Table of Contents
Advertisement
Capacitive Touchscreen
Introduction to Jakob Hatteland Display products with touchscreen
JHD uses both Resistive and Capacitive touchscreen solutions for their products. Please visit our
website to verify what product and touchscreen solution your product have.
Capacitive Touchscreen
Capacitive touchscreens operate using oscillator circuits
that are located in each corner of the glass overlay and
measure the capacitance of the area to be "touched".
Depending on where the user touches the overlay, the
oscillators will vary in frequency. A touchscreen controller
then measures the frequency variations to ascertain the
coordinates of the person's touch. This glass overlay has
a coating that stores the charge deposited over its surface
electrically. It will not operate with either a gloved hand
or with a mechanical stylus.
Brief Specifications
Subject
Construction
Positional Accurancy
Touch Contact
Requirements
Enduarance Tested
Cleaning
Liquid Resistance
Light Transmission
Updated touchscreen drivers and documentation for your operating system:
Please visit our website www.hatteland.com (click on support, and then touchdrivers) for 3rd party
software, drivers and complete documentation for
Touchscreen
Top: ClearTek protective overcoat protects the sensors and increase durability.
Inside: Electrode X/Y grid pattern and conductive coating.
Bottom: Glass and conductive coating.
Small amount of voltage is applied to the four corners for measuring X and Y
coordinates of the touch point.
Reported touch coordinates are within 1.0% of true position.
(Based on viewing area dimensions)
3 ms for finger input.
More than 225 million touches in one location without noticable degradation to
the surface.
Water, isopropyl, alcohol, and similar non-abrasive cleaners.
Liquids on screen does not impede touchscreen performance.
Up to 88% at 550 nm; dependant on specific surface finish chosen.
Details
touchscreens.
26
IND100110-1 Rev.1
Hide quick links:
Advertisement
Table of Contents
