Importance

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Abstract

An electronic device such as a mobile telephone device incorporates a flexible keyboard within its casing, said keyboard incorporating a plurality of switches or sensors distributed over said keyboard area which detect finger pressure, or which alternatively detect the presence of a finger adjacent to said switch means, where said keyboard can be rolled-up around a central roller located within the housing of said electronic device when not in use, and can at least partially extracted from within said electronic device when required, and laid flat for use as a keyboard. The mobile telephone may also incorporates facilities to modulate properties of light and/or sound which are emitted by facilities incorporated within said phone to announce or signal to a user an incoming call, where the particular properties of said light and/or sound emitted are determined by a pre-programmed relationship to properties of ambient sound and/or ambient light detected by sensors incorporated within said phone.

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First Claim