INPUTTING APPARATUS AND INPUTTING METHOD

Title:

INPUTTING APPARATUS AND INPUTTING METHOD

Document Type and Number:

WIPO Patent Application WO/2007/111291

Kind Code:

A1

Abstract:

Provided is an inputting apparatus which prevents contact failures and has reduced thickness. On the surface of a substrate (6), a coplanar line (5) is formed so that the line passes through the vicinity of a position where a user performs operation. A terminating resistor (4) is arranged at one end of the coplanar line (5), and a microcomputer module (3) is arranged at the other end. A signal generator (16) of the microcomputer module (3) outputs a signal to the coplanar line (5). When the user operates a key, the impedance of the coplanar line (5) changes and a reflected wave is generated. A signal detector (18) detects the reflected wave, and outputs receiving signal strength information, which indicates the strength of the signal included in the reflected wave, to a computing unit (19). The computing unit (19) discriminates the operated key, based on the receiving signal strength information and the strength of the signal outputted from the signal generator (16), and specifies the inputted instruction.

Inventors:

YAMASAKI SHUJI (JP)

Application Number:

PCT/JP2007/056177

Publication Date:

October 04, 2007

Filing Date:

March 26, 2007

Export Citation:

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Assignee:

NEC CORP (JP)
YAMASAKI SHUJI (JP)

International Classes:

G06F3/023; H01H36/00; H01P5/02; H03M11/24

Foreign References:

JPH054254U	1993-01-22
JPH11194883A	1999-07-21
US6137282A	2000-10-24
EP0483519A1	1992-05-06

Other References: