8.Smart Operation Panel G2.5
718
Touch Panel
The touch panel of this machine uses a 4-wire resistive film method (low load resistive film analog 4-
wire method). It can detect two points for flick/drag/pinch-in/pinch-out operations. Resistive touch panel
has been adopted in order to allow operation with a prosthetic hand.
Basic Structure
An analog 4-wire resistive film touch panel has 2 layers. Two materials (mainly film or glass) with
transparent conductive film (ITO) are attached such that the transparent conductive film layers face
each other.
When the film is pressed with a finger or a pen, the transparent conductive films contact each other and
the touch panel operation is recognized.
Insulators (spacing dots) secure space between the two transparent conductive film layers to prevent
short-circuiting.
Because the transparent conductive film has a uniform resistance characteristic, the resistance value
reflects the distance of contact.
[A]: Spacing dot
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