Keyboard of mobile terminal and method for realizing keying and keyboard lock for same

A mobile terminal and keyboard technology, which is applied in the field of keyboard and keyboard lock, can solve the problems of not being able to judge the locked state of the keyboard, increasing the cost, and having no way for the user to know the lock, so as to overcome the complexity of use, reduce the complexity, and save money. Effects on system resources

Active Publication Date: 2012-05-23
ALLWINNER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the following three methods are often used to realize common button and lock button methods, one is to collect signals through an analog-to-digital converter (Analog-to-Digital Converter is called for short ADC), if a zero value is detected as a lock, See figure 1 Among them, although the above method is simple and does not require additional input/output port (input/output, referred to as I/O) resources, there is a problem that if the lock key is pressed and other common keys are pressed, the analog/digital converter ( The input of the ADC) has been connected to the ground, the analog/digital converter (ADC) cannot detect other levels, the analog/digital converter (ADC) will not respond, so it cannot be judged that the keyboard has been locked. In the application, the user There is no way to know that it has been locked; the other is to realize multiple common keys through an analog/digital converter (ADC), and th

Method used

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  • Keyboard of mobile terminal and method for realizing keying and keyboard lock for same
  • Keyboard of mobile terminal and method for realizing keying and keyboard lock for same
  • Keyboard of mobile terminal and method for realizing keying and keyboard lock for same

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Embodiment 1

[0020] The keyboard of the mobile terminal of the present invention, such as Figure 4 As shown, it includes a keyboard module and a key processing module; the keyboard module includes common keys, locking keys and a plurality of resistors; the key processing module includes an analog / digital converter (expressed with ADC), and the analog / digital converter including input ports;

[0021] The reference voltage of the analog / digital converter (represented by ADC_REF) is connected to the input port through a resistor; the input port of the analog / digital converter is connected to a plurality of series voltage dividing resistors, and each of the voltage dividing resistors is connected in series A common key is connected to the ground, and each common key has a common key discrimination voltage; the input port of the analog / digital converter is also connected to a voltage dividing resistor and a locking key to the ground, and the locking key has a locking key discrimination voltage...

Embodiment 2

[0048] The method for realizing keys and keyboard locking of the keyboard of the mobile terminal of the present invention is characterized in that:

[0049] The keyboard of the mobile terminal includes a keyboard module and a key processing module; the keyboard module includes common keys, locking keys and a plurality of resistors; the key processing module includes an analog / digital converter, and the analog / digital converter includes an input port;

[0050] The reference voltage ADC_REF of the analog / digital converter is connected to the input port through a resistor; the input port of the analog / digital converter is connected to a plurality of series voltage dividing resistors, and each of the voltage dividing resistors is connected in series to an ordinary button to Ground, each ordinary key has an ordinary key discrimination voltage; the input port of the analog / digital converter is also connected to a voltage dividing resistor and the locking key to the ground, and the l...

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Abstract

The invention discloses a keyboard of a mobile terminal. The keyboard comprises a keyboard module and a keying processing module, wherein the keyboard module comprises normal keys, a lock key and a plurality of resistive dividers; the keying processing module comprises an analog/digital converter, and the analog/digital converter comprises an input port; the reference voltage ADC-REF of the analog/digital converter is connected to the input port via a resistor; the input port of the analog/digital converter is connected with a plurality of serially connected resistive dividers, and each resistive divider connects a normal key in series to ground; the input port of the analog/digital converter further connects one resistive divider and the lock key to ground; the keying processing module further comprises a control logic unit; and the control logic unit judges whether the keyboard is locked and judges the pressed key as the normal key or the lock key according to changes of an input voltage signal ADC-IN of the analog/digital converter. With the keyboard and the method disclosed by the invention, input/output port resource is saved, system resource of programs is saved, and simultaneously, complexity is reduced.

Description

technical field [0001] The invention relates to a keyboard and a keyboard locking method, in particular to a keyboard of a mobile terminal and a method for realizing key and keyboard locking. Background technique [0002] In the prior art, the following three methods are often used to realize common button and lock button methods, one is to collect signals through an analog-to-digital converter (Analog-to-Digital Converter is called for short ADC), if a zero value is detected as a lock, See figure 1 Among them, although the above method is simple and does not require additional input / output port (input / output, referred to as I / O) resources, there is a problem that if the lock key is pressed and other common keys are pressed, the analog / digital converter ( The input of the ADC) has been connected to the ground, the analog / digital converter (ADC) cannot detect other levels, the analog / digital converter (ADC) will not respond, so it cannot be judged that the keyboard has been ...

Claims

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Application Information

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IPC IPC(8): G06F3/02
Inventor 单军王洪魁
Owner ALLWINNER TECH CO LTD
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