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Large Size Touch Screen Panel

I 、 Description II 、 Capacitive screen manufacturer explains the principle of capacitive screen. Capacitive touch screen technology USES the human body's current induction to work. Capacitive touch screen is a four layer composite glass screen, the inner surface of the glass and laminated...

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    IDescription     

    Specification

    Model No.

    XHC-270085-USB

    Panel Size

    27” INCH

    Construction

    LENS

    Cover glass 3mm

    OCA

    LOCA 0.2mm

    SENSOR

    ITO glass 1.1mm

    FPC

    Flexible flat cable 0.3±0.03mm

    Mechanical Characteristics

    Outline Dimension(mm)

    646mm*384mm

    View Area(mm)

    598mm*336mm

    Thickness

    4.3±0.15mm

    Input Method

    Finger or conductive pen

    Hardness

    ≥6H 7H 9H options

    Accuracy

    +/-1mm@10mm

    Interface

    IIC USB RS233

    Touch points

    2、5、10 Touch points,others options

    Electrical Characteristics

    Operating Voltage

    DC 1.8 V, 2.8V, 3.2V,5V options

    Insulation Resistance

    >20MΩ  At DC 25V

    Response Time

    <5ms

    Optical Characteristics

    Total Transmittance

    >85%  >90% options

    Total Haze  

    <3%

    IICapacitive screen manufacturer explains the principle of capacitive screen.    

    Capacitive touch screen technology USES the human body's current induction to work. Capacitive touch screen is a four layer composite glass screen, the inner surface of the glass and laminated coated with a layer of ITO, the outermost layer is a thin layer of silica glass coating, laminated ITO coating as the working face, four corners raises four electrodes, inner ITO for shield to ensure good working environment.

    When the fingers on the metal layer, the electric field due to the human body, the capacitance screen manufacturers users and touch screen surface formed by a coupling capacitance, for high frequency current, capacitance is directly conductor, so the fingers from the point of contact suck a small current. The current issue from the touch screen on the four corners of the electrode respectively, the four electrodes and the current is proportional to the finger to the four corners, the controller based on the four current ratio of precise calculation, it is concluded that the location of the touch point.

    Capacitive touch to achieve multi-touch, rely on is to increase the mutual capacitance electrode, capacitance screen manufacturers, in a nutshell, is to screen block, in every region set up a set of mutual capacitance modules are independent, so the capacitance screen can detect a touch of the regional independence, after processing, simply realize multi-touch.

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