Chapter 2: Design of the Lumat LB 9507
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2.1 Keyboard
The Lumat functions are directed through keyboard entries. The
keyboard consists of twenty-six letter keys, twelve numerical keys,
three softkeys, and five additional function keys (<enter>,
<delete>, <last>, <exit> and <space>). Softkeys are keys with
changing functions defined by software and shown on the display.
The functions are selected using the corresponding buttons
beneath the display.
The keyboard design utilizes pushbuttons which are all sealed to
protect them from liquid spillage (Fig. 2-4). Audio feedback of key
action is provided by a short beep for correct entries and a longer
beep for incorrect entries.
1 Alphanumeric keyboard
2<space> key
3 Function keys <exit>, <delete>, <last> and <enter>
4 Softkeys
5 Display
6 Softkey functions: left, center, right
6
exit delete last enter
1 2 3 4 5 6 7 8 9 0 .
Q W E R T Y U I O P
A S D F G H J K L -
space Z X C V B N M /
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Fig. 2-4: Keyboard
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