WO2003048884A2 - Procede et dispositif de saisie de caracteres - Google Patents

Procede et dispositif de saisie de caracteres Download PDF

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Publication number
WO2003048884A2
WO2003048884A2 PCT/SG2002/000284 SG0200284W WO03048884A2 WO 2003048884 A2 WO2003048884 A2 WO 2003048884A2 SG 0200284 W SG0200284 W SG 0200284W WO 03048884 A2 WO03048884 A2 WO 03048884A2
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
identities
sensor identities
unique
character
Prior art date
Application number
PCT/SG2002/000284
Other languages
English (en)
Other versions
WO2003048884A3 (fr
Inventor
Mann Fai Yip
Original Assignee
The National University Of Singapore
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
Application filed by The National University Of Singapore filed Critical The National University Of Singapore
Priority to AU2002365750A priority Critical patent/AU2002365750A1/en
Publication of WO2003048884A2 publication Critical patent/WO2003048884A2/fr
Publication of WO2003048884A3 publication Critical patent/WO2003048884A3/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • G06F3/0233—Character input methods
    • G06F3/0235—Character input methods using chord techniques
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • G06F3/0233—Character input methods

Definitions

  • the present invention relates generally to an input device for inputting characters into a computer system. More particularly, the invention relates to an input device having multiple input sensors operating cooperatively for detecting a sequence of input strokes for representing an input character in an electronic mobile device.
  • An example of an electronic mobile device is a personal digital assistant (PDA), which requires a stylus used as a pointing instrument for interacting with a contact sensitive screen for selecting commands and inputting characters. While such interaction is similar to the use of conventional pen and paper, it is not without disadvantages. Firstly, it requires a user to use both hands to operate. Secondly, complex software algorithms are typically needed to recognize the handwriting of the user. Thirdly, the stylus-based interaction requires good hand-eye coordination to be effective. Fourthly, the effectiveness of the stylus-based interaction is dependent on the screen size of the PDA; the larger the screen size, the better the interaction. Therefore, the screen size is restricted by the effectiveness of the stylus-based interaction, which in turn limits how small the PDA can be.
  • PDA personal digital assistant
  • Another character input method is to use a 9-Key numeric keypad that is commonly seen on mobile phones.
  • Each of the 9 keys of the 9-Key numeric keypad 100 is usually assigned a number as well as several letters, with the exception of number "1" key, as shown in FIG. 1.
  • the user can enter characters, such as the English letters, by pressing one of the 9 keys of the 9-Key numeric keypad 100 repeatedly to select the desired letter to form a word.
  • the word prediction method reduces the number of key presses a user needs to make by predicting the word the user tries to form from the keys pressed. For example, to form the word “HELLO", the user only needs to press the number "4" key 102 once for the letter “H”, number "3” key 104 once for the letter “E”, number "5" key 106 once for the first letter “L”, and again number "5" key 106 once for the second letter “L”, and number “6” key 108 once for the letter “O”. Altogether, the user only presses the keys a total of five times.
  • the word prediction method is able to predict the word by counter-checking the combination of letter entered by the user with a pre-installed dictionary residing in the mobile phone's memory. This is most effective if "HELLO" is the only word that can be formed from the keys pressed. In most cases, more than one word can be formed from the same keys pressed the same number of times. For example, if the user wants to enter the word "CAT”, the number keys the user needs to press number keys are "2", "2" and "8". However, the words “BAT”, "ACT” can also be formed from pressing these keys. In this case, the user is presented with an option to select the desired word.
  • the word predication method helps in word formation, it typically needs a substantially large memory size to store the dictionary and may slow down the text prediction process. Furthermore, mobile phones typically have limited storage space and can only store words that are most commonly used. Therefore, if the user wants to enter words that are not found in the phone's dictionary, the user needs to switch off the word prediction feature and revert back to the multi-tap input method.
  • a method for inputting characters for an electronic device having a memory comprising the steps of: providing an input device for inputting characters into the electronic device, the input device having a plurality of sensors; assigning each of the plurality of sensors a unique sensor identity; providing a first plurality of sensor identities, the first plurality of sensor identities including at least two unique sensor identities and representing a character; receiving from the input device a second plurality of sensor identities having at least two unique sensor identities upon the sequential activation of at least two of the plurality of sensors assigned with the at least two unique sensor identities; and matching the second plurality of sensor identities with the first plurality of sensor identities and deriving the character represented by the first plurality of sensor identities.
  • an apparatus for inputting characters for an electronic device comprising: an input device for inputting characters into the electronic device, the input device having a plurality of sensors, each of the plurality of sensors being assigned a unique sensor identity; means for defining a first plurality of sensor identities, the first plurality of sensor identities including at least two unique sensor identities and representing a character; and a microprocessor, the microprocessor comprising: a receiver for receiving from the input device a second plurality of sensor identities having at least two unique sensor identities upon the sequential activation of at least two of the plurality of sensors assigned with the at least two unique sensor identities; and a decoder for matching the second plurality of sensor identities with the first plurality of sensor identities and deriving the character represented by the first plurality of sensor identities.
  • FIG. 1 shows a prior art 9-Key numeric keypad character input device
  • FIG. 2 shows a character input device according to an embodiment of the invention
  • FIG. 3 shows an array of input stroke sequences for the various English letters using the character input device of FIG. 2;
  • FIG. 4 shows an array of predefined input stroke sequences representing the various English letter using the array of input stroke sequences of FIG. 3 ;
  • FIG. 5 shows a block diagram of a typical electronic mobile device connected to the input device of FIG. 2;
  • FIG. 6 shows a flowchart diagram of logical operations of a process according to an embodiment of the invention for deriving a character using the input device of FIG. 2;
  • FIG. 7 shows a virtual tree structure constructed from the array of predefined input stroke sequences of FIG. 4.
  • An input device 200 is an 8- direction joystick.
  • the 8-direction joystick comprises an array of input sensors 202 (a-h) and a reference point 204 preferably arranged in a standard 3x3 matrix or the like arrangement with the reference point 204 occupying the center position in an electronic mobile device as shown in FIG. 2.
  • the 8-direction joystick further comprises a toggle stick (not shown) having an array of actuators (also not shown) attached to the toggle stick.
  • the toggle stick is mounted over the array of input sensors 202 (a-h) such that when the toggle stick is toggled in one direction, one of the array of actuators activates one of the array of input sensors 202 (a-h). Also as shown in FIG.
  • each of the array of input sensors and the reference point 204 are assigned a unique numeric number between 1 and 9 indicating their positions relative to each other.
  • Each of the array of input sensors is preferably a discrete contact sensor typically found in a digital controller, for example a 4-direction joystick found on mobile phones. Typically, the 4-direction joystick is used for navigating the menus and applications of the mobile phones. The user does this by using the thumb to control the 4-direction joystick.
  • the reference point 204 can also be a contact sensor. However, in the 8-direction joystick, the reference point 204 is preferably defined as a position when none of the array of input sensors is being activated.
  • characters are generated by having the user control the 8-direction joystick with the thumb in predefined input stroke sequences that represent the desired characters.
  • Each of the characters has a predefined input stroke sequence consisting of one or more input strokes.
  • various input stroke sequences can be generated to represent letters in the English alphabet and other characters.
  • the input stroke sequence for the letter "A" comprises at least three input strokes.
  • the first input stroke is defined by the input sensor 202b being activated relative to the reference point 204.
  • the second input stroke is defined by the input sensor 202c being activated subsequent to the input sensor 202b being activated.
  • the third input stroke is defined by the input sensor 202e being activated subsequent to the input sensor 202c being activated. Therefore, the input stroke sequence for the letter "A” is defined by the input sensors 202b, 202c, 202e being activated in that sequential order starting from the reference point 204. Following the unique numeric designation for the array of input sensors 202 (a-h) and the reference point 204 (as shown in FIG. 2), the letter “A” is represented by the following input stroke sequence: "5236". Alternatively, the letter “A” can also have a fourth input stroke when the input sensor 202h is activated subsequent to the activation of the input sensor 202e. In this case, the letter “A” has an alternative input stroke sequence: "52369" depending on the controllability of the user.
  • the input stroke sequences for the rest of the English alphabet can be generated in such way so as to closely resemble the intuitive and natural way of writing the English alphabet.
  • Other characters and symbols can also be generated using the input device 200.
  • These input stroke sequences are stored as reference input stroke sequences in the memory 400 of the electronic mobile device, as shown in FIG. 4.
  • the reference input stroke sequences are preferably stored in the memory 400 in a format 402.
  • Each of the reference input stroke sequences is prefixed with a corresponding character and stored in a series with a "
  • " delimiter is used to separate the adjacent predefined input stroke sequences, other delimiting characters can also be used to perform the same function.
  • the input device 200 is electrically connected to and preferably attached to the electronic mobile device 500 including a microprocessor 502, a user interface 504, a random-access memory 506 and the memory 400 for storing the reference input stroke sequences, as shown in FIG. 5.
  • the user enters an input stroke sequence of a desired character by controlling the toggle stick with the thumb and activating the input sensors 202 (a-h) in accordance with the reference input stroke sequence for the desired character as exemplified in FIG. 3.
  • the microprocessor 502 detects the input stroke sequence, preferably one input stroke at a time, and performs a check between the input stroke sequences received from the input device 200 and the reference input stroke sequences stored in the memory 400. Once a match is found, the desired character defined by the reference input stroke sequence is displayed on the user interface 504.
  • the microprocessor 502 simply ignores the input stroke sequence entered and waits to detect another input stroke sequence from the input device 200. In other applications, the microprocessor 502 can also be programmed to display an error message on the user interface 504 to inform the user of the incorrect entry.
  • the above operation is exemplified in a character entry process 600 (the process), as shown in FIG. 6.
  • the process 600 is executed by the microprocessor 502.
  • the process 600 provides logical operations of the preferred embodiment of the invention.
  • the microprocessor 502 retrieves the reference input stroke sequences stored in the memory 400 and constructs a virtual tree structure 700 as exemplified in
  • the virtual tree structure 700 has a plurality of branches.
  • the root node of the virtual tree structure 700 represents the reference point 204, which is the joystick position number 5.
  • Each of the reference input stroke sequences is represented by one of the plurality of branches of the virtual tree structure 700.
  • Each of the branches of the virtual tree structure 700 consists of at least two nodes, one of these nodes being the root node.
  • Each of the nodes represents a joystick position or an input sensor and activating an input sensor adjacent to a current input sensor or current joystick position constitutes an input stroke in the input stroke sequence.
  • the number of nodes in each of the branches depends on the way the input stroke sequence is defined for a given character.
  • the next possible joystick positions can be traced from the root node by traversing the virtual tree structure 700 one node at a time until the end of the branch is reached.
  • the input stroke sequence for the letter "F' is represented by a branch 702, as seen in FIG. 7.
  • the branch 702 consists of nodes 704, 706, 708 and 710, in which a first input stroke is generated when the user moves the joystick from the reference point 204, which is the root node, node 704, to node 706 by activating the input sensor 202b.
  • a second input stroke is generated when the user moves the joystick from node 706 to node 708 by activating the input sensor 202a subsequent to activating the input sensor 202b at node 706, and so on until the end of the branch at node 710 is reached. Once the end of the branch is reached, that is, the end of the input stroke sequence, the desired input character is found.
  • the data structure "struct_STICKPOSINFO” contains information on relationships between joystick positions as well as the characters located at the different joystick positions, if any.
  • the "*pParentStickPos" variable is a pointer to a memory location in the electronic mobile device 500, where information relating to a parent joystick position, which is the previous joystick position of the input stroke in an input stroke sequence, is located.
  • the variable “cCurrentStickPos” contains the identity of a current joystick position.
  • the variable “cCharacter” contains the character located at the current joystick position. If no character is located at the current joystick position, it can be due to the fact that the current joystick position is not predefined and hence an invalid joystick position. Alternatively, the current joystick position is not the end of an input stroke sequence. In this case, the variable "cCharacter” contains a null.
  • the "*pConnector” variable is a pointer to another memory location in the electronic device 500, where a connector linked list is located.
  • the connector linked list contains pointers to all the possible next valid joystick positions or child joystick positions relative to the current joystick position. If there is no such child joystick position exists, the "*pConnector” variable points to a null memory location in the electronic mobile device 500.
  • the connector linked list can be represented by another data structure as shown below:
  • the "*pChildStickPos" variable points to yet another memory location in the electronic mobile device 500, where information relating to a child joystick position relative to the current joystick position is located. However, if there is no valid child joystick position relative to the current joystick position because the child joystick position is not predefined, then the "*pChildStickPos” variable points to the null memory location in the electronic mobile device 500.
  • the "*pNextConnector” variable points to still another memory location in the electronic mobile device 500, where information relating to another child joystick position relative to the current joystick position is located. If there is no such child joystick position exist, the "*pNextConnector” variable simply points to the null memory location in the electronic mobile device 500.
  • the "*pChildStickPos" variable points to the null memory location
  • the "*pNextConnector” variable also points to the null memory location.
  • the purpose of the "*pNextConnector” variable is to address the situations where more than one valid input stroke are defined relative to the current joystick position.
  • the microprocessor 502 derives the character the user wishes to enter by traversing the branches of the virtual tree structure 700 using the data structures (1) and (2) as it receives the input strokes from the input device 200.
  • the microprocessor 503 initializes the current joystick position of the input device 200 to the reference point 204 in an initialization step 602, and proceeds to read a new joystick position in a step 604.
  • the new joystick position is referred to as the current joystick position in the data structure (1).
  • the new joystick position is checked to verify if it is a valid joystick position in relation to the parent joystick position in a step 606.
  • the microprocessor 502 does this by accessing the memory location in the electronic mobile device 500 where the information relating to the parent joystick position is located and matching the information received from the input device with the information in the memory location. For example, if the new joystick position is either a "1", a "3", a "7", or a
  • the microprocessor 520 proceeds to check if the new joystick position is the last joystick position of an input stroke sequence in a step 608.
  • the microprocessor 502 checks the variable "cCharacter" by accessing the memory location in the electronic mobile device 500 where the information relating to the parent joystick position is located to determine if there is a character assigned to the variable "cCharacter" at the new joystick position. If the assigned character is a null, the end of the input stroke sequence is not reached. The microprocessor 502 returns to the step 604 to read another new joystick position.
  • the microprocessor 502 proceeds to a step 610 to check whether there is a further at least one child joystick position exists by accessing the memory location in the electronic mobile device 500 pointed to by the "*pConnector" variable. If the memory location contains a null, the end of the input stroke sequence is reached. The character the user desires to enter is confirmed and the microprocessor 502 proceeds to display the character on the user interface in a step 620. However, if the memory location pointed to by the "*pConnector" variable is not a null, at least one child joystick position is found.
  • the memory location pointed to by the "*pConnector” contains information relating to the at least one child joystick position as pointed to by the "*pChildStickPos" variable and the "*pNextConnector” variable, if any. Further, it is also possible that the user has not finished the input stroke sequence for the desired character. In this case, the microprocessor 502 proceeds to set a timer at a step 612 and continues to check if the user enters another input stroke by activating a new adjacent input sensor to indicate a new joystick position before the timer expires in a step 614. In the example, the timer is preferably set to 200 milliseconds.
  • the microprocessor 502 checks if the new joystick position is at the reference point 204 at a step 616. If this is the case, it is assumed that the user has completed the input stroke sequence and proceeds to reset the timer at a step 618a before displaying the character on the user interface in the step 620. However, if the new joystick position is not at the reference point 204, the microprocessor 502 resets the timer at a step 618b and proceeds to the step 606 to process the new joystick position. The microprocessor 502 continues to loop from the step 602 through to the step 620 until the user finishes entering all the desired characters and exits the character entry mode upon which, the microprocessor 502 terminates the process 600.
  • the process 600 can be implemented in a number of ways depending on the electronic mobile device specifications and operating environment.
  • the process 600 can be implemented in one of software, firmware, special purpose digital logic, or any combination thereof.
  • the implementation of the virtual tree structure 700 is not limited to the usage of the data structures (1) and (2). Other like data structures and variation thereof can also be used.
  • the usage of the input device 200 is not limited to electronic mobile devices. It can also be electronically connected to video gaming machines, Internet TV set-top boxes, interactive TVs, or the like devices. Therefore, it will be apparent to those skilled in the art that various modifications and changes may be made without departing from the scope and spirit of the invention. "

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés à la saisie de caractères dans un dispositif mobile électronique. Le procédé fait intervenir une manette 8 directions qui intègre un dispositif de saisie permettant de saisir des caractères dans le dispositif mobile électronique. Lorsqu'un utilisateur se sert de la manette, le dispositif de saisie transmet au dispositif mobile électronique des signaux de saisie correspondant à une séquence de mouvements de saisie prédéterminée. Les signaux de saisie sont ensuite comparés à une pluralité de séquences de mouvements de saisie de référence pour éventuellement obtenir un caractère.
PCT/SG2002/000284 2001-12-05 2002-12-05 Procede et dispositif de saisie de caracteres WO2003048884A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002365750A AU2002365750A1 (en) 2001-12-05 2002-12-05 Method and apparatus for inputting characters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG200107521-7 2001-12-05
SG200107521 2001-12-05

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Publication Number Publication Date
WO2003048884A2 true WO2003048884A2 (fr) 2003-06-12
WO2003048884A3 WO2003048884A3 (fr) 2004-03-04

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100362458C (zh) * 2004-06-15 2008-01-16 乐金电子(中国)研究开发中心有限公司 便携式终端的文字输入装置及方法
WO2011057586A1 (fr) * 2009-11-16 2011-05-19 北京搜狗科技发展有限公司 Procédé et appareil de saisie d'un caractère à l'aide d'une action directionnelle
CN103823571A (zh) * 2014-02-12 2014-05-28 广州新游网络科技有限公司 基于双方向控制的输入法系统
CN106201008A (zh) * 2016-06-27 2016-12-07 北京新美互通科技有限公司 一种输入法键盘布局方法及装置

Citations (6)

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Publication number Priority date Publication date Assignee Title
US4614747A (en) * 1983-07-29 1986-09-30 Usv Pharmaceutical Corp. Derivatives of alpha-alkyl polyolefinic carboxylic acid useful in the treatment of psoriasis
DE19528734A1 (de) * 1995-08-04 1997-02-06 Siemens Ag Sprechhörer
US5608395A (en) * 1994-06-22 1997-03-04 The Hugh Macmillan Rehabilitation Centre Simplified computer access system
EP0927949A2 (fr) * 1997-12-29 1999-07-07 SAMSUNG ELECTRONICS Co. Ltd. Méthode et système de reconnaissance de caractères pour un terminal mobile de communication radio
WO1999046563A1 (fr) * 1998-03-10 1999-09-16 Magellan Dis, Inc. Appareil d'entree de caracteres pour systeme de navigation
WO2000023870A1 (fr) * 1998-10-19 2000-04-27 Gerhard Wergen Procede de transfert de caracteres en particulier a un ordinateur, et dispositif d'entree fonctionnant selon ce procede

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614747A (en) * 1983-07-29 1986-09-30 Usv Pharmaceutical Corp. Derivatives of alpha-alkyl polyolefinic carboxylic acid useful in the treatment of psoriasis
US5608395A (en) * 1994-06-22 1997-03-04 The Hugh Macmillan Rehabilitation Centre Simplified computer access system
DE19528734A1 (de) * 1995-08-04 1997-02-06 Siemens Ag Sprechhörer
EP0927949A2 (fr) * 1997-12-29 1999-07-07 SAMSUNG ELECTRONICS Co. Ltd. Méthode et système de reconnaissance de caractères pour un terminal mobile de communication radio
WO1999046563A1 (fr) * 1998-03-10 1999-09-16 Magellan Dis, Inc. Appareil d'entree de caracteres pour systeme de navigation
WO2000023870A1 (fr) * 1998-10-19 2000-04-27 Gerhard Wergen Procede de transfert de caracteres en particulier a un ordinateur, et dispositif d'entree fonctionnant selon ce procede

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100362458C (zh) * 2004-06-15 2008-01-16 乐金电子(中国)研究开发中心有限公司 便携式终端的文字输入装置及方法
WO2011057586A1 (fr) * 2009-11-16 2011-05-19 北京搜狗科技发展有限公司 Procédé et appareil de saisie d'un caractère à l'aide d'une action directionnelle
CN103823571A (zh) * 2014-02-12 2014-05-28 广州新游网络科技有限公司 基于双方向控制的输入法系统
CN106201008A (zh) * 2016-06-27 2016-12-07 北京新美互通科技有限公司 一种输入法键盘布局方法及装置
CN106201008B (zh) * 2016-06-27 2019-05-21 北京新美互通科技有限公司 一种输入法键盘布局方法及装置

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WO2003048884A3 (fr) 2004-03-04
AU2002365750A8 (en) 2003-06-17

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