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Apparatus for performing key control

A control device and button technology, applied in the fields of instruments, electrical digital data processing, electrical components, etc., can solve the problem of reducing the number of buttons, non-removable, etc., and achieve the effect of reducing the number of necessary pins

Inactive Publication Date: 2013-06-26
XUESHAN TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in cases where cost reduction is required to design a lower priced product in the target market, some problems arise
More specifically, when it is necessary to reduce the overall pin count to save costs, since according to the prior art, reducing the key matrix (key matrix) pin count (for example, the pin number for one key matrix) usually will Reduces the number of buttons available to the end user, so reducing the button matrix pin count should not help
For example, a conventional key matrix with 49 keys requires 14 pins (e.g. (7+7) pins for (7*7) keypads), and according to the prior art, these 14 pins are non-removable

Method used

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  • Apparatus for performing key control
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  • Apparatus for performing key control

Examples

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no. 1 example

[0019] According to the first embodiment, the key control device 100 includes an IC 110 and a printed circuit board (printed circuit board, PCB) 120, wherein the key control device 100 may include at least one two-key control module implemented on / inside the PCB 120 , such as a plurality of two-button control modules, wherein each of the plurality of two-button control modules (eg, one of the two-button control modules under consideration) can be used to perform key control of two keys. In addition, the IC 110 is configured to detect the pressing of a key according to at least a part of the multiple input / output signals of the key matrix, wherein the key matrix includes a plurality of keys (for example, two keys controlled by the dual key control module under consideration). In this embodiment, the plurality of input / output signals of the key matrix includes a plurality of first input / output signals corresponding to the first direction, for example, a plurality of row signals {...

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Abstract

The invention provides an apparatus for performing key control. The apparatus for performing key control includes an integrated circuit (IC) arranged to detect a key press according to some input / output signals of a key matrix, where the input / output signals include first input / output signals corresponding to a first direction and second input / output signals corresponding to a second direction. In addition, the IC includes a plurality of first pins and a plurality of second pins, for transmitting the first and the second input / output signals respectively corresponding to the first direction and the second direction. The apparatus can reduce required pin numbers of the key matrix.

Description

technical field [0001] The present invention relates to the reduction of the number of key matrix pins of electronic devices, and more particularly, to devices for performing key control. Background technique [0002] According to the prior art, an end user can use a portable electronic device equipped with a plurality of keys to edit a document or a message. And in cases where cost reduction is required to design a lower priced product in the target market, some problems arise. More specifically, when it is necessary to reduce the overall pin count to save costs, since according to the prior art, reducing the key matrix (key matrix) pin count (for example, the pin number for one key matrix) usually will This results in fewer buttons available to the end user, so reducing the button matrix pin count should not help. For example, a conventional key matrix with 49 keys requires 14 pins (e.g. (7+7) pins for (7*7) keypads), and according to the prior art, these 14 pins are no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/94
CPCG06F3/0202H03M11/20
Inventor 王慈鸿
Owner XUESHAN TECH INC