Touchscreen products

Introduction to Jakob Hatteland Display products with touchscreen

We use both Resistive and Capacitive touchscreen solutions for our products. Please visit our website to find your exact type number and then determine if it uses Resistive or Capacitive. If you have a customized or tailored product, please check the specifications in this manual or third-party specifications from your supplier.

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.

CAPACITIVE - Brief Specifications

Subject

Details

 

 

Construction

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.

Positional Accurancy

Reported touch coordinates are within 1.0% of true position. (Based on viewing area dimensions)

Touch Contact Requirements

3 ms for finger input.

Enduarance Tested

More than 225 million touches in one location without noticable degradation to the surface.

Cleaning

Water, isopropyl, alcohol, and similar non-abrasive cleaners.

Liquid Resistance

Liquids on screen does not impede touchscreen performance.

Light Transmission

Up to 88% at 550 nm; dependant on specific surface finish chosen.

Resistive Touchscreen

It generally uses a display overlay composed of layers, each with a conductive coating on the interior surface. Special separator “dots” are distributed evenly across the active area and separate the conductive interior layers. The pressure from using either a mechanical stylus or finger produces an internal electrical contact at the “action point” which supplies the controller with vertical and horizontal analog voltages for data input. The resistive touchscreens are anti-glare to reduce reflective shine intensity, which will slightly diffuse the light output throughout the screen. Resistive technology activation can be initiated by; a gloved hand, fingernail, mechanical stylus or an ungloved finger.

RESISTIVE - Brief Specifications

Subject

 

 

Details

 

 

Construction

Top: Polyester with outside hard-surface coating with clear or anti-glare finish.

 

Inside: Transparent conductive coating.

 

 

Bottom: Glass substrate with uniform conductive coating.

 

Top and bottom layers separated by separator dots.

 

Positional Accurancy

Standard deviation of error is less than +- 0.080-inch (2mm).

Touch Activation Force

Typically 57 to 133 g

 

 

 

 

Expected Life Performance

More than 35 million touches in one location without failure, using a stylus similar to a finger.

 

 

Chemical Resistance

Acetone, Ammonia-based glass cleaners, Common food and beverages,

(Exposed for one hour)

Hexane, Isopropyl alcohol, Methylene chloride, Methyl ethyl ketone,

 

Mineral spirits, Turpentine

 

 

Light Transmission

Typically 75% over visible light spectrum.

 

 

 

 

 

Touchscreen

12

INB100014-1 (Rev 19)

IND100110-1