Mechanism
SM 8-21 D0CA/D0C9/D0C8/D0CB
8.2.3 ELECTRICAL COMPONENTS
Operation Panel Unit
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.
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 [C] contact
each other and the touch panel operation is recognized.
Insulators (spacing dots [A]) secure space between the two transparent conductive film layers
to prevent short-circuiting.
Because the transparent conductive film [C] has a uniform resistance characteristic, the
resistance value reflects the distance of contact.
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