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Key input device and portable mobile communication terminal using key input device

An input device and key technology, applied in the input/output process of data processing, user/computer interaction input/output, virtual key detection/prevention, etc., can solve problems such as hindering the miniaturization of portable telephones and increasing costs.

Inactive Publication Date: 2014-04-02
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a plurality of diodes are provided, the cost will increase. In addition, since the key matrix circuit increases the installed space, it will hinder the miniaturization of the mobile phone, so it is desirable to avoid such a problem.

Method used

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  • Key input device and portable mobile communication terminal using key input device
  • Key input device and portable mobile communication terminal using key input device
  • Key input device and portable mobile communication terminal using key input device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] First, a mobile phone 10 as an embodiment of the present invention will be described.

[0052] 1. Configuration of the mobile phone 10

[0053] 1.1. Functional blocks of the mobile phone 10

[0054] figure 1 It is a block diagram showing the configuration of the mobile phone 10 .

[0055] The mobile phone 10 includes an antenna 100 , a wireless communication unit 200 connected to the antenna 100 , a key input device 300 , a ROM (Read Only Memory) 400 , and a control unit 500 .

[0056] The wireless communication unit 200 is a circuit that undertakes wireless communication processing such as demodulation processing of reception signals received via the antenna 100 , modulation processing of transmission signals sent via the antenna 100 , and the like.

[0057] The key input device 300 is composed of a plurality of keys such as a cross key and a ten-key key for indicating various directions, and has a function of accepting user input operations. Details of the key in...

Embodiment approach 2

[0142] In the present embodiment, when the key is pressed three times, it is possible to realize the assurance that the processing based on the false detection of the unpressed key is not performed by simpler control.

[0143] In the key scanning circuit 310 of the present embodiment, each functional unit of the counting unit 314 , the determination unit 315 , and the output control unit 316 performs the following processing different from that of the first embodiment.

[0144] The counting unit 314 counts the number of conducting key scanning lines and key sensing lines in the detection information input from the generating unit 312 , and sends it to the determining unit 315 .

[0145] The determination unit 315 determines whether the number of key scanning lines and key sensing lines that are connected to each other input from the counting unit 314 is more than 4, and sends the determination result to the output control unit 316 .

[0146] The output control unit 316 control...

Embodiment approach 3

[0155] In Embodiment 1, when the received first detection information includes the information corresponding to the unset key among the information indicating the conduction, the information obtained by rewriting the information to the information indicating the non-conduction is generated. The second detection information, but in this embodiment, in the case where the second detection information includes the information corresponding to the key corresponding to the special key among the information indicating the conduction, the information is rewritten by generating The detection information (third detection information) obtained after the information indicating non-conduction is used to mask the key corresponding to the special key. Here, the special key corresponds to a control key (hereinafter, denoted as "Ctrl" key), a shift key (hereinafter, denoted as "ALT" key), a shift key (hereinafter, denoted as "SHIFT" key), and the like.

[0156] Figure 11 It is a functional b...

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Abstract

First detection information related to electrical connection between each row signal line and each column signal line is received from a key matrix circuit (S101). Based on the first detection information, it is determined whether a possibility exists that a user has pressed at least three key switches simultaneously and electrical connection between signal lines for a key switch that has not been pressed has been erroneously detected (S108). Information in accordance with key switches pressed by the user is output based on the first detection information when the determination is negative (S109), whereas output of information based on the first detection information is blocked when the determination is positive.

Description

technical field [0001] The present invention relates to a key input device provided with a plurality of key switches, and particularly relates to control when three or more key switches are turned on simultaneously. Background technique [0002] As a key input device of a portable communication terminal such as a mobile phone, a key input device having a key matrix structure composed of key scanning lines and key sensing lines is used (for example, refer to Patent Document 1). [0003] refer to Figure 16 , to describe the general button matrix structure. [0004] Figure 16 The structure of the key input device 1 included in the mobile phone is shown. [0005] Such as Figure 16 As shown, the key input device 1 has a key matrix structure composed of 5 key scanning lines (key scanning 0-4) and 5 key sensing lines (key sensing 0-4), and the portable telephone (not shown) The key switch corresponding to each of the plurality of keys (for example, ten key (ten key), cross key...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/02G06F3/023H03M11/20
CPCH03M11/003G06F3/023G06F3/02
Inventor 神井敏宏三木康弘
Owner KYOCERA CORP
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