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Low-power dissipation keyboard and scanning positioning method thereof

A low-power, keyboard technology, applied in the input/output, dynamic coding and other directions of user/computer interaction, can solve the problem of electronic equipment running out of battery power, and achieve the effect of low average power consumption

Inactive Publication Date: 2013-08-21
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no problem with this method under normal working conditions, but when the button is pressed for a long time, the electronic device that has been in operation for a long time will quickly drain the battery power

Method used

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  • Low-power dissipation keyboard and scanning positioning method thereof

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Embodiment Construction

[0029] The specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] See figure 1 , the embodiment of the present invention is composed of a controller unit 10 and a matrix keyboard unit 20 .

[0031] The controller unit 10 in the embodiment is a single-chip microcomputer that can work in a sleep mode, and the single-chip microcomputer can be woken up by an external interrupt and an on-chip timer interrupt to enter an active mode. The MSP430 single-chip microcomputer meets the requirements for the single-chip microcomputer in the implementation mode.

[0032] The controller unit 10 is also embedded with a programmable PWM module 110 , a row-line scanning control module 120 and an interrupt application module 130 related to the matrix keyboard unit 20 . The programmable PWM module 110 , the line scanning control module 120 , and the interrupt application module 130 can still work when the controller ...

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PUM

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Abstract

The invention discloses a low-power dissipation keyboard and a scanning positioning method thereof. The low-power dissipation keyboard comprises a controller unit and a matrix keyboard unit. A program control PWM module, a row line scanning control module, an interrupting applying module are embedded into the controller unit. The controller unit controls the program control PWM module to output a PWM pulse to sample keyboard states of the matrix keyboard unit at regular intervals. When no button is pressed down, electricity energy cannot be consumed by the matrix keyboard unit, and the controller unit is in a sleeping mode. When a button is pressed down, the electricity energy is consumed only in short time in the process of sampling by the matrix keyboard unit, an interrupting application is put forward to wake up the controller unit to enter an active mode, and after the controller unit carries out scanning positioning on a keyboard and carries out corresponding processing, the controller unit enters the sleeping mode again.

Description

technical field [0001] The invention relates to an electronic product keyboard and a scanning positioning method thereof, in particular to a battery-powered electronic product low-power keyboard and a scanning positioning method thereof. Background technique [0002] Battery-powered handheld electronic products must meet the design requirements of low power consumption. [0003] Electronic devices such as remote controls only need to work when a button is pressed. This type of electronic device is used as a method to achieve low power consumption. Usually, when no button is pressed, the electronic device is in shutdown. When the button is pressed, the system power is turned on through the power control circuit, the electronic equipment is powered on, and then the button input status is automatically detected and processed accordingly. There is no problem with this method under normal working conditions, but when the key is pressed for a long time, the electronic device that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/02H03M11/20
Inventor 凌云周维龙李飞彭琼林陈欢
Owner HUNAN UNIV OF TECH
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