Hatteland Display 19 inch - JH 19T14 MMC - Manual (Page 15)

15
IND100110-1
Touchscreen
Introduction to products with touch screen
Both Resistive and Capacitive touch screen solutions are used for our products. Please review specifications found in
this manual or our website (www.hatteland-display.com) to find your exact type number and then determine if it uses
Resistive or Capacitive.
Capacitive Touch screen
The 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 touch screens operate by applying a small amount of
voltage to each corner of the touch screen. When the screen is touched by a human finger it draws a minute amount
of current to the X,Y point of contact. This location is calculated by the touch screen controller and transmitted back to
the computer connected to the touch screen controller.
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 Touch screen
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 touch screens
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.
Cleaning Water, isopropyl, alcohol, and similar non-abrasive cleaners.
Chemical Resistance
(Exposed for one hour)
Acetone, Common food and beverages, Hexane, Isopropyl alcohol, Methylene chloride, Methyl ethyl ketone,
Mineral spirits, Turpentine
Light Transmission Typically 75% over visible light spectrum.
Touch screen products