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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Product Details

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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