Various input and output components and methods have been adopted by smartphones.
The only major output component is the screen, whereas there are several popular input ones.
The following introduce various kinds of input and output components and methods.
Keyboards
- Regular keyboards:
The problem with these keyboards is that they are too small for touch-typing.
- Soft keyboards:
They are the keyboards displayed on the screens.
They have the same problem, too small for touch-typing, as the regular keyboards have.
- External, plug-in keyboards:
The keyboards could have a regular size, but they suffers from inconvenience.
- Fabric keyboards:
They can be rolled up or folded around the handheld devices to relieve the problem of external keyboards.
- Virtual keyboards:
A virtual keyboard is where a full-size image of a QWERTY keyboard is projected onto any surface.
Touching the image of a key generates a unique electronic signal corresponding to a key’s image.
Using a virtual keyboard eliminates the chance of breakage and infection transfer.
Additionally virtual keyboards require no cleaning and they have no wires, buttons, or switches.
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Regualr keyboard
Soft keyboard
External keyboard
Fabric keyboard
Virtual keyboard
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