WO1999046909A1 - Device for entering signs into a cellular telephone - Google Patents

Device for entering signs into a cellular telephone

Info

Publication number
WO1999046909A1
WO1999046909A1 PCT/SE1999/000389 SE9900389W WO1999046909A1 WO 1999046909 A1 WO1999046909 A1 WO 1999046909A1 SE 9900389 W SE9900389 W SE 9900389W WO 1999046909 A1 WO1999046909 A1 WO 1999046909A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
device
accordance
characterized
above patent
accelerometer
Prior art date
Application number
PCT/SE1999/000389
Other languages
French (fr)
Swedish (sv)
Inventor
Johan Ullman
Original Assignee
Johan Ullman
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545Pens or stylus
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00402Recognising digital ink, i.e. recognising temporal sequences of handwritten position coordinates
    • G06K9/00409Preprocessing; Feature extraction

Abstract

The invention concerns a device for character input in a mobile telephone. It is distinguished by replacing the set of buttons/keyboard by the signals from an accelerometer being decoded. The device is built into the mobile telephone, or sends signals via a line, or cordlessly, to the mobile telephone. Decoding into characters or commands takes place by means of algorithms for pattern recognition of the acceleration signals or their time integration. Movements that correspond to characters are distinguished from the movement pattern when contact with a writing surface is made.

Description

DEVICE FOR ENTERING SIGNS INTO A CELLULAR TELEPHONE

TECHNICAL FIELD

The invention concerns a device for character input in a mobile telephone. It replaces a set of buttons or keyboard and, for example, makes it possible to reduce the size of mobile telephones.

BACKGROUND

In mobile telephony it is becoming increasingly common to send text messages and E-mail. Coinciding with telephones becoming smaller, it is becoming increasingly difficult to make space for a text-input keyboard. The invention in question provides the possibility of text input without a keyboard.

SUMMARY OF THE INVENTION

For the purpose described above, the invention provides a device for character input in a mobile telephone, in accordance with the following patent claim.

The invention is thus based on the signals from an accelerometer being decoded and the characters being identified by means of algorithms for pattern recognition. The device is part of the mobile telephone or sends signals to the mobile telephone via a line or cordlessly.

DESCRIPTION OF PREFERRED EMBODIMENTS

By fitting objects such as a mobile telephone or another tangible object with a sensitive accelerometer, the accelerometer can be made to send signals when the object is used in the same way as a pen. When the signals are decoded, patterns in them can be linked to various characters or commands. In this way, a computer can be programmed to recognise the movement patterns of various hand-written characters. In practice, this can then be employed in a mobile telephone, for example, in such a way that the entire telephone is used like a pen.

To achieve the best possible degree of efficiency, the accelerometer should be located as far away as possible from the object's centre of gravity, such as in one of its corners or on the tip of a mobile telephone's antenna. When the object, e.g. the telephone, is then used like a "pen", the part of the telephone that contains the accelerometer can be held against the writing surface. This is because the tip of a pen is the part that moves the most when the pen is used for writing.

The accelerometer can even be fitted into a separate object that could be similar to a pen in shape. Then the signals from the accelerometer, either before or after processing/interpretation/decoding to characters/commands, could be sent via a line or cordlessly to the telephone.

In accordance with the invention, the accelerometer can be uni-, di- or triaxial.

Basic principle for decoding signals Decoding of the acceleration signals is based on pattern recognition. It is not necessary to integrate the signals so that the written characters are visible in order for them to be recognised. Character recognition can be performed either on the direct acceleration signals or following time integration of the position signals.

Advantages

Compared to decoding of speech, the decoding of hand movements means processing significantly (at least by a factor of ten) smaller quantities of information. To further limit the quantity of information that needs to be processed, higher and lower frequencies can be filtered out when the accelerations that are generated by normal handwriting fall within a fairly narrow frequency range. Discernment of character sequences within the movement pattern The device must be able to discern movements that correspond to a character or a command from the movements to which it is subjected. First, it must be able to identify the start and end of a character. The following methods can be used to decide which parts of a movement pattern should be decoded.

Contact with the surface, contact sensor or pressure sensor A pressure sensor or contact sensor in the tip of the device signals when the device comes into contact with the (writing) surface. From this point on the acceleration signals are decoded on the horizontal plane until the device is lifted from the surface, i.e. the contact sensor signals that contact with the surface has been broken.

Surface contact - acceleration pattern

When the device is brought into contact with the surface, powerful acceleration at right angles to the surface arises. If a triaxial accelerometer is used, this signal can be used to identify the start of the characters/commands. From this juncture, the acceleration signals are decoded on the horizontal plane until the device is lifted from the surface, which is recognised by the resulting acceleration that arises when the pen is lifted from the surface.

Surface contact - vibration patterns

If the device is used on an uneven surface, such as paper, the vibrations that arise during the writing process are detected by means of the accelerometer and used as a signal that contact with the surface is taking place.

Movement to the left

If all the characters are written on the same spot, the device must be moved back between two characters. This movement, in conjunction with a downward movement, could be used to mark the start of a character. In the same way, a movement upwards could be used to recognise the end of a character. 4 Discernment of commands from within the movement pattern

It is also possible to allow movements, other than those that correspond to written characters, to match various commands. For example, movements in three dimensions can be used for this. The command movements are essentially recognised in the same way as characters, i.e. by means of algorithms for pattern recognition.

Other uses

The device can also be used to recognise people's initials or signatures. By decoding and registering the acceleration pattern, it will in practice be impossible to forge signatures. The principle described for decoding handwriting movement patterns, interpreted by means of an accelerometer, can also be used for character input in a computer. The advantages of this are evident, such as when the computer is so small there is no space for a keyboard; or for people who have difficulties in using a normal keyboard.

Claims

PATENT CLAIMS
1. Device for character input in a mobile telephone, characterized by it containing an accelerometer, which is designed to decode the character input movements when the device is used like a pen.
2. Device for character input in a mobile telephone, characterized by an accelerometer being located in a separate object, which, before or after processing, interpretation or decoding, is designed to send signals to a telephone, either via a line or cordlessly.
3. Device in accordance with either of the above patent claims, characterized by an accelerometer being located at the greatest possible distance from the centre of gravity of the device, such as in the tip of the mobile telephone's antenna.
4. Device in accordance with any of the above patent claims, characterized by the accelerometer being uni-, bi- or triaxial.
5. Device in accordance with any of the above patent claims, characterized by, when the accelerometer is triaxial, its sensor being induced to monitor the movements against the surface and analyse them on the horizontal plane.
6. Device in accordance with any of the above patent claims, distinguished by character recognition being based on the acceleration signals, their first time integral, their second time integral, or a combination of these.
7. Device in accordance with any of the above patent claims, characterized by the amount of information being limited by means of filtering out high and/or low frequencies in the acceleration signals.
6 8. Device in accordance with any of the above patent claims, characterized by the start and end of a written character being recognised by a contact or pressure sensor detecting that the object is in contact with the writing surface.
9. Device in accordance with any of the above patent claims, characterized by the start and end of the written character being recognised by the acceleration pattern that arises when the object is brought into contact with, or is lifted from, the writing surface.
10. Device in accordance with any of the above patent claims, characterized by the start and end of the written character being recognised by the vibration pattern that arises when the object is moved against an uneven writing surface, such as paper.
11. Device in accordance with any of the above patent claims, characterized by certain movement patterns corresponding to commands.
12. Use of the device in a mobile telephone in accordance with any or some of the above patent claims.
PCT/SE1999/000389 1998-03-12 1999-03-12 Device for entering signs into a cellular telephone WO1999046909A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9800851-9 1998-03-12
SE9800851 1998-03-16

Publications (1)

Publication Number Publication Date
WO1999046909A1 true true WO1999046909A1 (en) 1999-09-16

Family

ID=20410552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/000389 WO1999046909A1 (en) 1998-03-12 1999-03-12 Device for entering signs into a cellular telephone

Country Status (1)

Country Link
WO (1) WO1999046909A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347593A (en) * 1999-01-06 2000-09-06 Motorola Inc Use of motion to input information into a radio telephone
WO2001048590A1 (en) * 1999-12-23 2001-07-05 Anoto Ab Written command
WO2002021252A1 (en) * 2000-09-07 2002-03-14 Anoto Ab Electronic recording and communication of information
WO2002039373A1 (en) * 2000-11-10 2002-05-16 Anoto Ab Method and device for addressing mail items
DE10120512A1 (en) * 2001-04-26 2002-10-24 Siemens Ag Input of text, commands, SMS messages, etc. to a mobile terminal device such as a mobile phone or PDA by displacement of the device itself over a contact surface to reproduce text in an intuitive and ergonomic manner
DE10150141A1 (en) * 2001-10-11 2003-04-24 Siemens Ag Device for acquisition and representation of movements, e.g. for use in capture of handwriting or sketches drawn on a plasma type display, and also for use as a conventional mouse type device with single hand operation
US6698660B2 (en) 2000-09-07 2004-03-02 Anoto Ab Electronic recording and communication of information
WO2004082248A1 (en) * 2003-03-11 2004-09-23 Philips Intellectual Property & Standards Gmbh Configurable control of a mobile device by means of movement patterns
DE102004008254A1 (en) * 2004-02-19 2005-09-01 Siemens Ag Portable electronic device e.g. mobile telephone, has acceleration sensor realizing movement of device to output acceleration data, and evaluation unit analyzing movement curve to identify characters or symbols as control instructions
WO2005081095A2 (en) * 2004-02-19 2005-09-01 Siemens Aktiengesellschaft Method for assessing a virtual writing plane
US6985138B2 (en) 2003-08-29 2006-01-10 Motorola, Inc. Input writing device
US7035429B2 (en) 2000-11-10 2006-04-25 Anoto Ip Lic Handelsbolag Method and device for addressing mail items
US7295193B2 (en) 1999-12-23 2007-11-13 Anoto Ab Written command
US7721968B2 (en) 2003-10-31 2010-05-25 Iota Wireless, Llc Concurrent data entry for a portable device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513437A (en) * 1982-06-30 1985-04-23 International Business Machines Corporation Data input pen for Signature Verification
EP0439340A2 (en) * 1990-01-24 1991-07-31 Nec Corporation Portable radio telephone set
WO1994009447A1 (en) * 1992-10-13 1994-04-28 Zvi Orbach Apparatus for reading handwriting
EP0615209A2 (en) * 1993-03-12 1994-09-14 Kabushiki Kaisha Toshiba Information input device, position information holding device, and position recognizing system including them
US5434371A (en) * 1994-02-01 1995-07-18 A.T. Cross Company Hand-held electronic writing tool
WO1995021436A1 (en) * 1994-02-04 1995-08-10 Baron Motion Communications, Inc. Improved information input apparatus
WO1997016799A2 (en) * 1995-10-31 1997-05-09 Baron Technologies Ltd. Continuous security system based on motion code

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513437A (en) * 1982-06-30 1985-04-23 International Business Machines Corporation Data input pen for Signature Verification
EP0439340A2 (en) * 1990-01-24 1991-07-31 Nec Corporation Portable radio telephone set
WO1994009447A1 (en) * 1992-10-13 1994-04-28 Zvi Orbach Apparatus for reading handwriting
EP0615209A2 (en) * 1993-03-12 1994-09-14 Kabushiki Kaisha Toshiba Information input device, position information holding device, and position recognizing system including them
US5434371A (en) * 1994-02-01 1995-07-18 A.T. Cross Company Hand-held electronic writing tool
WO1995021436A1 (en) * 1994-02-04 1995-08-10 Baron Motion Communications, Inc. Improved information input apparatus
WO1997016799A2 (en) * 1995-10-31 1997-05-09 Baron Technologies Ltd. Continuous security system based on motion code

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347593B (en) * 1999-01-06 2001-05-23 Motorola Inc Apparatus and method for using motion to input information to a wireless communication device
GB2347593A (en) * 1999-01-06 2000-09-06 Motorola Inc Use of motion to input information into a radio telephone
US7295193B2 (en) 1999-12-23 2007-11-13 Anoto Ab Written command
WO2001048590A1 (en) * 1999-12-23 2001-07-05 Anoto Ab Written command
US6698660B2 (en) 2000-09-07 2004-03-02 Anoto Ab Electronic recording and communication of information
WO2002021252A1 (en) * 2000-09-07 2002-03-14 Anoto Ab Electronic recording and communication of information
US7035429B2 (en) 2000-11-10 2006-04-25 Anoto Ip Lic Handelsbolag Method and device for addressing mail items
WO2002039373A1 (en) * 2000-11-10 2002-05-16 Anoto Ab Method and device for addressing mail items
DE10120512A1 (en) * 2001-04-26 2002-10-24 Siemens Ag Input of text, commands, SMS messages, etc. to a mobile terminal device such as a mobile phone or PDA by displacement of the device itself over a contact surface to reproduce text in an intuitive and ergonomic manner
DE10150141A1 (en) * 2001-10-11 2003-04-24 Siemens Ag Device for acquisition and representation of movements, e.g. for use in capture of handwriting or sketches drawn on a plasma type display, and also for use as a conventional mouse type device with single hand operation
WO2004082248A1 (en) * 2003-03-11 2004-09-23 Philips Intellectual Property & Standards Gmbh Configurable control of a mobile device by means of movement patterns
US6985138B2 (en) 2003-08-29 2006-01-10 Motorola, Inc. Input writing device
US7721968B2 (en) 2003-10-31 2010-05-25 Iota Wireless, Llc Concurrent data entry for a portable device
WO2005081095A3 (en) * 2004-02-19 2005-11-17 Siemens Ag Method for assessing a virtual writing plane
WO2005081095A2 (en) * 2004-02-19 2005-09-01 Siemens Aktiengesellschaft Method for assessing a virtual writing plane
DE102004008254A1 (en) * 2004-02-19 2005-09-01 Siemens Ag Portable electronic device e.g. mobile telephone, has acceleration sensor realizing movement of device to output acceleration data, and evaluation unit analyzing movement curve to identify characters or symbols as control instructions

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