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Projected Capacitive Touch Panel
Technology
The projected capacitive touch screen works on the principle of conventional capacitive touch screens with the addition of two sensing arrays (X and Y) on two different layers that are perpendicular to each other along with a drive line. As X and Y arrays exist on different layers, the point where the two intercept becomes a capacitive node. When electrical currents run along one of the arrays through the drive line, the other array and the circuitry that detects change in capacitive values becomes connected. During actual operation, the controller sends electrical currents to the drive lines on different layers to create a specific electrical field with the nodes.
When the user places his finger or uses a touch medium close to the touch screen, the controller immediately picks up the change in capacitive value between the nodes and drive lines to point the exact location of the touch event. Since the sensing arrays on the panel form a 3D electrical field that is independent to the surface capacitors, the touch event registers even when no physical contact with the touch screen is made. In other words, projected capacitive touch screens feature Z-axis recognition.
Strengths
Projected Capacitive touch panel is flat Surface, short response time, 0g active force, it supports Multi-touch function. With sensitivity, high transparency, harder surface, suitable for consumer electric products.
Applications
Projected capacitive touch panels are excellent for outdoors usages, such as Kiosk, ATM, and Ticketing machine. It may be used as multiple-touch platform, the potential of implementing in cell phone, PDA, GPS, tablet PC, Gaming, POI and military applications are foreseeable.
Specification
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Operating Temp. |
-5℃ ~+ 60℃ /20%~90%RH |
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Storage Temp. |
-20℃ ~+ 70℃ /10%~90%RH |
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Type |
Analogy / Digital Film / Glass Film / Film |
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Connector |
FPC |
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ITO Film |
Thickness :175/188μm |
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ITO Glass |
Thickness:0.55mm/0.7mm |
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Input Method |
Finger |
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Active Force |
Finger : 0g |
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Surface Hardness |
Depend on customer's Lens |
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Voltage |
DC2.5V ~ DC 5V |
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Current |
4.9mA ~ 10mA(Depends on IC) |
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Linearity |
±1.5% |
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Response Time |
10m sec |
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Light Transparency |
85% ~ 87% |
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Temperature/Humidity |
60℃ @90%RH/240h |
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High Temperature test |
80℃ /240h |
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Low Temperature test |
-30℃ /240h |
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Thermal Shock |
-40℃ (0.5H)<-> 80℃ (0.5H) Total 50 cycles |
Standard Products
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Size |
Frame Area |
View Area |
Thickness |
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No. |
(inch) |
(mm) |
(mm) |
(mm) |
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1 |
10.4" |
233*180 mm |
218*168 mm |
3, 6, 9 |
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2 |
12" |
265.5*205 mm |
251*191 mm |
3, 6, 9 |
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3 |
12.1" |
278.5*178mm |
263*165mm |
3 |
|
4 |
15" |
326.5*253 .5 mm |
307*232 mm |
3, 6, 9 |
|
5 |
17" |
360*295 mm |
341*274 mm |
3, 6, 9 |
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6 |
18.1" |
383*297mm |
370*286mm |
3 |
|
7 |
19" |
402*329 mm |
380*309 mm |
3, 6, 9 |
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8 |
19" |
428*278mm |
415*261 mm |
3, 6 |
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10 |
21.3" |
456*349 mm |
438*330 mm |
3 |
|
11 |
22" |
493*319.4 mm |
478*301 mm |
3 |
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