A inductive-switch user interface device and portable terminal thereof

Abstract

This invention relates to the inductive-switch touch-sensitive keyboards on portable terminals. As is known, if we are to keep the original fonctions of the digital keyboard on a cell-phone, the power consumption of the Gell-phone will increase when the user manually input words, and the idle time and working time of the Gell-phone will shrink. This invention, with consideration to the aboye, provides an inductive-switch user interface as well as the corresponding portable terminal, includes multiple keys, at least one of inductive devices that couples with each key, and at least one of electric-mechanical switch networks that corresponds with each of the keys. The Said inductive devices and electricmechanical switch networks are connected to the same inductive-switch circuit. When an inducting object slides within the inductive space of the said inductive device, the inductive-switch circuit will output track information on the position of the said inducting object. Likewise, when an inducting object presses the key such that at least one of the electric-mechanical switch networks is switched on, the said inductive-switch circuit will generate information about the position and state of that pressed key. The useful function of this invention lies in that it maintains the original outside structure of the cell-phone while providing functions like manual words input and cursor control.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an induction switch type touch keyboard for a portable terminal; specifically, a user interface device and a portable terminal thereof. Background technique [0002] With the development of communication technology, mobile phone, as a kind of portable terminal, has become a popular communication tool. With the needs of users, mobile phones are developing towards miniaturization, humanization, diversification and digitalization. Traditional mobile phones are mainly based on calls. The requirements for the user interface device are relatively simple. The mobile phone keypad based on the electromechanical switch principle has been able to meet the requirements very well. Such a keyboard usually includes ten numeric / letter keys from 0 to 9, and several function keys. An elastic cap is arranged under the key, and when the key is pressed, the conductive layer of the elastic cap...

AI Technical Summary

Problems solved by technology

easy to misjudgment

The judgment critical value of the contact force does not correspond to the rebound point of the elastic cap, which makes the user confused about the tactile feedback, and it is easy to misjudge whether the button has been pressed

Second, although the input surface can be very flat to facilitate handwriting input, the force on the touchpad is not smooth with or without the elastic cap due to the existence of the elastic cap, which makes the handwriting input feel poor

The uneven force will cause discontinuity in handwriting recognition and reduce the recognition rate of handwriting input

Third, the elastic cap is in direct contact with the touchpad, and the frequent deformation and movement of the elastic cap will cause wear and tear on the touchpad

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