Tontec 7 inch Touchscreen Panel Kit for AT070TN90 Raspberry Pi LCD Screen

Four-wire touch screen works:
Four-wire resistive touch screen is resistive family, the most widely used and most popular one. It consists of a line (glass or film material) conductive ITO layer and the upper line (film material) conductive ITO layer. Slightly separated by an insulating middle point, when the touch screen surface without pressure, up and down the line is open. Once the pressure applied to the touch screen surface. Vertical line becomes conductive, the controller circuit driving voltage applied to the conductive layer of ITO in the X coordinate direction, the line through the probe the conductive layer of ITO on the detection voltage of the X direction, whereby the contact point of the projected X coordinates. By changing the direction of the applied voltage to the controller, similarly to the measured Y coordinate of the contact, the contact position to clear.

Specifications Performance:
*Surface hardness: 3H
*Light transmittance: bright surface material> 83% matte material:> 78%

Life:
*Percussion life:> 1 million times (single point click)
*Strokes life> 100,000 times
*Operating temperature: -10 „ƒ ~ +60 „ƒ (Humidity: 20% ~ 85%, non-condensing water droplets)
*Storage temperature: -20 „ƒ ~ +70 „ƒ (Humidity: 20% ~ 90%, non-condensing water droplets)
*Resolution: 4096 * 4096
*Linearity <1.5% (special needs can be <1.0%)
*Operating pressure: 10g-100g (tip or finger touch)
*Glass thickness: 0.7mm, 1.1mm, 1.8mm, 3.0mm
*Glass Category: chemically strengthened glass, riot glass.

NOTE:LCD SCREEN IS NOT INCLUDED.

User Manual:https://s3.amazonaws.com/ttbox/7inchtouchpanel.zip