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4-wire Resistive Touch Panel

I、 Description: II 、 What is a four-wire touch screen? The four-wire touch screen contains two resistive layers.One layer has a vertical bus on the left and right edges of the screen, and the other has a horizontal bus at the bottom and top of the screen, as shown in figure 4.In order to measure...

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    I、 Description: 

    Best price with 100% high qaulity 10.4" visual door phone touch panel

    Specification

    Size

    10.4” inch

    Item No.

    XHC-104008-2-K

    Structure

    ITO glass+ITO film+tail

    Outline dimension

     234.6mm*142.60mm

    View Area

     228.2mm*136.2mm

    Total  thickness

    1.45±0.15mm

    Cover glass treatments

    Anti-glare,Anti-reflective,anti-finger,anti-explosion

    Operating system

    Android, Linux, Win CE, Win7,Win8, XP

    Operating Condition

    -10℃ to 60℃,  ≤90% RH

    Storage condition

    -20℃ to 70℃,  ≤90% RH

    Transparency

    >77%

    Surface Hardness

    ≥6H

    Customized

    Available

    IIWhat is a four-wire touch screen?

    The four-wire touch screen contains two resistive layers.One layer has a vertical bus on the left and right edges of the screen, and the other has a horizontal bus at the bottom and top of the screen, as shown in figure 4.In order to measure in the X axis, the left bus is biased to 0V, and the right bus is biased to VREF.Connect the top or bottom bus to ADC and make a measurement when the top and bottom are in contact.

    In order to measure in the Y-axis direction, the top bus is biased to VREF, and the bottom bus is biased to 0V.The ADC input is connected to the left bus or the right bus, and the voltage can be measured when the top layer is in contact with the bottom layer.Figure 5 shows a simplified model of the four-wire touch screen in two layers.For the four-wire touch screen, the ideal connection method is to connect the offset to the positive reference input of the bus ADC of the VREF, and the negative reference input of the bus with the set of 0V to the ADC.

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