Importance

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Abstract

A keyboard for a handheld device comprises a plurality of side-keys and a main keyboard. The side-keys are configured at one side(s) and/or back of the device and used for changing layout of the main keyboard and operated by one hand holding the device. The main keyboard is used for inputting characters/commands and operated by another hand. Some or all of the side-keys can also be re-used as mouse buttons together with a touch screen of the device being re-used as a touch pad for a mouse. Some or all of the side-keys are operated by means of releasing a finger holding a side-key first and then using the finger to press down or touch the side-key to hold it again. This method operating a side-key can also be used for other key/buttons such as mouse buttons of a touch mouse, a touch-pad mouse, etc. The main keyboard can further comprise a physical keyboard and a mapping keyboard configured on a touch screen of the device to realize much more keys by means of simultaneously pressing down and releasing two or more keys of the physical keyboard. A current layout of the physical keyboard is mapped to the mapping keyboard.

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First Claim