Reversible keypad and display for a telephone handset

Details Reversible keypad and display for a telephone handset Reversible keypad and display for a telephone handset

1997-12-12

2000-04-18

Chin, Wellington

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 90, 455550, 455575, 345173, 345172, H01S 400, H04B 138, G09G 500

Patent

active

060526068

ABSTRACT:
In cellular telephone handset having an upper casing and a lower casing, liquid crystal display screens with touch sensitive overlays are provided on each casing. In one mode of operation, the screen on the lower casing will display a telephone keypad and the telephone handset will respond to the touching of the keys from the telephone keypad to dial telephone numbers and will display information on the screen on the upper casing. In a second mode of operation, the screen on the upper casing will display function keys and the telephone handset will respond to the touching of the function keys and will display information on the screen on the lower casing.

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patent: 5581243 (1996-12-01), Quellette et al.
patent: 5584054 (1996-12-01), Tyneski et al.
patent: 5615384 (1997-03-01), Allard et al.
patent: 5633912 (1997-05-01), Tsoi
patent: 5808862 (1998-09-01), Robbins

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