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WO2002025577A2 - Systeme d'ecriture sans fil - Google Patents

Systeme d'ecriture sans fil Download PDF

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Publication number
WO2002025577A2
WO2002025577A2 PCT/US2001/029693 US0129693W WO0225577A2 WO 2002025577 A2 WO2002025577 A2 WO 2002025577A2 US 0129693 W US0129693 W US 0129693W WO 0225577 A2 WO0225577 A2 WO 0225577A2
Authority
WO
WIPO (PCT)
Prior art keywords
transmitter
pulses
location
receivers
planar area
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2001/029693
Other languages
English (en)
Other versions
WO2002025577A3 (fr
Inventor
Jianping Xu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
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 Intel Corp filed Critical Intel Corp
Priority to AU2001289143A priority Critical patent/AU2001289143A1/en
Priority to DE10196652T priority patent/DE10196652T1/de
Priority to GB0303837A priority patent/GB2381640B/en
Publication of WO2002025577A2 publication Critical patent/WO2002025577A2/fr
Publication of WO2002025577A3 publication Critical patent/WO2002025577A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing 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
    • G06F3/03545—Pens or stylus

Definitions

  • the present disclosure relates to electronic handwriting schemes, and, more particularly, wireless electronic handwriting schemes.
  • FIG. 1 is a diagram that illustrates a prior embodiment of a wireless electronic handwriting system.
  • FIG. 2 is a diagram that illustrates another prior embodiment of a wireless electronic handwriting system.
  • FIG. 3 is a diagram that illustrates an embodiment of a wireless electronic handwriting system in accordance with the invention.
  • FIG. 4 is a diagram that illustrates an embodiment of an ultrasonic transmitter in accordance with the invention that may be employed, for example, by the embodiment illustrated in FIG. 3.
  • wireless pen systems While embodiments of such wireless pen systems currently exist, these systems may have certain disadvantages. For example, as previously discussed, such systems may experience skipping or errors due to natural writing movements, such as rotation of a writing device employed in such an embodiment. Such systems may also experience various undesirable "dead zones", which will be discussed in more detail hereafter. Additionally, such systems typically employ multiple transmission/reception techniques such as, for example, one for synchronization and another for location determination.
  • FIG. 1 is a diagram that illustrates a current embodiment, 100, of a wireless pen system.
  • a writing device, 150 comprises a transmitter, 160.
  • Such a transmitter may contain multiple elements capable of transmitting, respectively, for example, infrared (IR) signals and unidirectional ultrasonic, or sonic, pulses.
  • IR infrared
  • RF radio frequency
  • a sensor/receiver apparatus such as 110 may comprise sensors 170, which may be employed for receiving such IR signals, and separate sensors 140, which may be employed for receiving such sonic pulses.
  • Such an apparatus may also contain an interface, such as cable 120, to couple such an apparatus with a computing device to, at least in part, capture handwritten information in electronic form.
  • signals and pulses would typically be generated at some substantially predetermined frequency for both IR signals and ultrasonic pulses in order to facilitate the capture of handwritten information by employing techniques such as those discussed herein.
  • the timing relationship of such received IR signals and sonic pulses may be employed in determining the location of such a writing device.
  • IR signals travel at speeds approaching the speed of light, such IR signals will arrive at sensors 170 substantially simultaneously regardless of the location transmitter 160 relative to such sensors.
  • transmitter 160 would typically be in reasonable proximity to sensors 170 so as to allow such IR signals and ultrasonic pulses related to handwritten information to be received by, for example, sensors 170 and receivers 140, as is desirable. This distance would typically be on the order of no more than several feet away and typically confined to a writing surface, such as 130.
  • a relative distance of transmitter 160 from each sensor may be determined by employing velocity equations. Such equations are well-known to those of skill in the art and the invention is not limited in scope to any particular technique for determining such distances. Such relative distances may then be employed to determine a location for transmitter 160 with respect to receivers 140.
  • triangulation computations may be employed based, at least in part, on receiver proximity and the relative distances of the transmitter from the receivers. Such triangulation computations are welLknown by those of skill in the art and the invention is not limited to any particular technique.
  • transmitter 160 comprises a unidirectional transmitter
  • the orientation of writing device 150 in such embodiments may determine whether or not IR signals and sonic pulses are received by, for example, sensors 170 and receivers 140. Therefore, a user of such a system may be restricted in writing motion by such a configuration.
  • This may be disadvantageous, as it may not be compatible with natural movements associated with handwritten information, such as rotation and tilting of such a writing device. Such rotation or tilting may result in skipping, discontinuities or extraneous information in the captured handwritten information because of the altered orientation of sensor 160 relative to sensors 140.
  • Such embodiments may also experience multiple dead zones due to various factors.
  • the typical configuration of receivers, such as 140, and sensors, such as 170 limits the angle at which they may be capable of receiving sonic pulses or IR signals. Outside this angle or scope, handwritten information may not be collected, even though it is within the bounds of writing surface 130. This is disadvantageous as it reduces the usable writing area a user may employ with such a system. Dead zones may also result, for example, from the configuration of a transmitter, such as 160. Though not illustrated in FIG. 1, such a dead zone may be due, at least in part, to the distance that transmitter 160 is from sensors 140 when it is desired to collect handwritten information.
  • Such transmitters typically have relatively large acoustic impedance as compare with air, large reflections of a sonic pulse may occur, resulting in significant attenuation of such a pulse.
  • Such reflections due to impedance mismatches are well known to those skill in the art and are analogous to signal reflections in transmission lines due to electrical impedance mismatches.
  • This attenuation due to such mismatches may, in turn, limit the radius from such receivers a user may employ in collecting handwritten information with such an embodiment. That is, a dead zone may exist outside such a radius.
  • FIG. 2 illustrates another current embodiment of a wireless pen system that is typically employed in conjunction with a dry erase board.
  • FIG. 2 contains two views of such an embodiment, a side view, 200, and a top view, 205.
  • writing device 250 comprises an infrared (IR) transmitter, 260, and an ultrasonic transmitter, 270.
  • IR transmitter 260 may be used in conjunction with IR sensors 230 to provide a substantially similar synchronization function as was previously described.
  • the sensor/receiver apparatus, 210 comprises IR sensors 230, receivers 240 and deflector 220.
  • ultrasonic pulses would be deflected by deflector 220 and then received by receivers 240.
  • a dead zone may, however, still depend, at least in part, on the particular deflector configuration being used. Additionally, since IR sensors in such embodiments typically have similar reception angles as have been previously discussed, a dead zone may, therefore, also exist due to the limitation of these sensors and their ability to receive synchronization signals outside certain angles or outside a certain scope.
  • a mounting apparatus, 290 which may comprise suction devices, may be employed.
  • cable 285 may be employed to couple such a receiver apparatus to a computing device to facilitate electronic collection of handwritten information on for example, writing surface 280.
  • a sensor apparatus has the previously discussed disadvantages associated with employing multiple sensors.
  • employing IR sensors 230 and receivers 240 may reduce the mobility of such a device as well as increase the cost of such an embodiment.
  • an ultrasonic transmitter such as 270
  • such embodiments may also experience skipping, rotation errors and dead zones due to transmitter distance from sensors 240, as were all previously discussed. Therefore, alternative embodiments of wireless pen systems may be desirable.
  • FIG. 3 illustrates an embodiment of a wireless pen system in accordance with the invention that addresses at least some of the foregoing disadvantages.
  • writing device 350 comprises an omni-directional cylindrical ultrasonic transmitter.
  • receiver apparatus 310 comprises semi-cylindrical receivers 330.
  • receivers 330 may comprise a capacitive piezo polymer film, such as polarized polyvinylidene fluoride (PVDF), for example.
  • PVDF polarized polyvinylidene fluoride
  • Such films are well known to those of skill in the art and may be obtained from, for example, Measurement Specialties, Inc., Sensor Products Division, 950 Forge Avenue - Bldg. B, Norristown, PA 19403.
  • PVDF polarized polyvinylidene fluoride
  • such a receiver configuration may reduce the size of a dead zone that may exist with state of the art approaches, as was previously described.
  • such receivers may be capable of receiving pulses or signals over a substantially 180 degree range, or a substantially planar area.
  • a dead zone for such an embodiment may be defined, at least in part, by the angle at which one sensor would be in the direct path from a transmitter to a second sensor.
  • the first sensor may interfere with the pulse from the transmitter, which may affect its ability to reach the second sensor.
  • employing such an embodiment may nonetheless, reduce the size of the dead zone area.
  • an RF signal may be generated by an electronic pulse used to excite ultrasonic transmitter 360.
  • a pulse may be generated, for example, by a transducer located in the barrel of pen 350.
  • excitation pulses are well known to those of skill in the art and are one way of initiating sonic pulses in ultrasonic transmitters, such as 360.
  • a pulse may be generated, for example, by a transducer or by discharging a resistive capacitive (RC) circuit.
  • RC resistive capacitive
  • Such an RF signal may then be received substantially simultaneously by receivers 330 and be employed in determining the relative distances of the transmitter from the receivers, in a similar manner as has been previously described.
  • the mobility of such embodiments may be improved due, at least in part, to reductions in size of such embodiments. Additionally, for example, the cost or such embodiments may be reduced.
  • rotation of a writing device, such as 350 comprising such a transmitter would not substantially affect the ultrasonic pulse characteristics at receivers 330 generated by such a transmitter. Due, at least in part, to this aspect, rotation of a writing device, such as 350, may not substantially affect an accurate determination of the location of such a writing device. Additionally, because of the cylindrical configuration of such an omni-directional transmitter, it may be located relatively close to the tip of a writing device, such as 350.
  • This aspect may be advantageous as it may reduce adverse effects, such as, for example, extraneous information that may result from tilting such a writing device.
  • placing the transmitter closer to the tip of the pen reduces the radius of an arc along which the transmitter would travel during such tilting. This reduced radius may, therefore, reduce the total distance a transmitter would travel along such an arc and, in turn, reduce the amount of extraneous information.
  • receiver apparatus 310 is coupled to computing device 370 via cable 320. This may allow computing device 370 to receive electronic information from receiver apparatus 310.
  • the invention is, of course, not limited in scope in this respect and alternative embodiments exist.
  • sensors 330 may be included in computing device 370 as opposed to such a receiver apparatus 310 being coupled to such a computing device via cable 320.
  • electronic information communicated via cable 320 may be as is discussed in further detail hereinafter.
  • FIG. 4 illustrates an embodiment of an omni-directional transmitter, 400, in accordance with the invention that may reduce the dead-zone related to acoustic impedance mismatch, as was previously discussed.
  • Such a transmitter may be employed as transmitter 360 in writing device 350, as was previously discussed.
  • transmitter 400 may comprise a cylindrical epoxy resin base, 400, and a matrix comprising piezo electric rods, such as 420.
  • acoustic impedance of such a transmitter may be reduced by approximately one order of magnitude.
  • Such a reduction in acoustic impedance of such a transmitter may, in turn, improve the impedance mismatch with air and increase the radius outside which the previous discussed dead zone occurs, which is desirable.
  • Method embodiments in accordance with the invention may employ the embodiment of a wireless pen system, as illustrated in FIG. 3. While such a method may be embodied as instructions on a storage medium, which may be executed by a computing device, such as 370, the invention is, of course, not so limited. Such a method embodiment may also employ techniques for determining writing device location as have been previously discussed. For example, an embodiment of such a method may comprise generating a synchronization signal, such as may be generated as a result of an excitation pulse. Such a method embodiment may further comprise generating an ultrasonic pulse and then determining relative distance from a plurality of sensors based on the timing relationships of the synchronization signal and the ultrasonic pulse.
  • Such a method may also further comprise determining the location of a writing device by employing triangulation calculations, the result of such calculations being based, at least in part, on the proximity of receivers, such as 330, and the relative distances determined by the timing relationships.
  • the synchronization signal and ultrasonic pulses which are typically analog, may be converted to digital representations of those signals/pulses. These digital representations may then, in turn, be employed in determining relative distances and location of a writing device relative to receivers, such as 330.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Position Input By Displaying (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

Système servant à suivre le déplacement d'un dispositif d'écriture et consistant en un émetteur pratiquement omnidirectionnel fixé au dispositif d'écriture, et en une pluralité de récepteurs semi-cylindriques pouvant recevoir, dans la totalité d'une zone pratiquement plane, une ou plusieurs impulsions générées par cet émetteur omnidirectionnel.
PCT/US2001/029693 2000-09-20 2001-09-20 Systeme d'ecriture sans fil Ceased WO2002025577A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2001289143A AU2001289143A1 (en) 2000-09-20 2001-09-20 Wireless handwriting system
DE10196652T DE10196652T1 (de) 2000-09-20 2001-09-20 Drahtlos übermitteltes Handschriftbild
GB0303837A GB2381640B (en) 2000-09-20 2001-09-20 Wireless handwriting scheme

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66636300A 2000-09-20 2000-09-20
US09/666,363 2000-09-20

Publications (2)

Publication Number Publication Date
WO2002025577A2 true WO2002025577A2 (fr) 2002-03-28
WO2002025577A3 WO2002025577A3 (fr) 2003-03-13

Family

ID=24673877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/029693 Ceased WO2002025577A2 (fr) 2000-09-20 2001-09-20 Systeme d'ecriture sans fil

Country Status (5)

Country Link
CN (1) CN1493057A (fr)
AU (1) AU2001289143A1 (fr)
DE (1) DE10196652T1 (fr)
GB (1) GB2381640B (fr)
WO (1) WO2002025577A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2388077A (en) * 2002-02-08 2003-11-05 Virtual Ink Corp Recording writing performed on a surface
WO2009143911A1 (fr) * 2008-05-29 2009-12-03 Sony Ericsson Mobile Communications Ab Stylet d'écran tactile sans fil
CN102375624A (zh) * 2010-08-27 2012-03-14 刘中华 平板结构的超声波手写板
WO2020070009A1 (fr) 2018-10-02 2020-04-09 Novozymes A/S Ribonucléases d'endonucléase 1 pour le nettoyage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012588A (en) * 1975-08-29 1977-03-15 Science Accessories Corporation Position determining apparatus and transducer therefor
CH669676A5 (fr) * 1986-01-23 1989-03-31 Zellweger Uster Ag
ES2005624A6 (es) * 1987-09-16 1989-03-16 Ezquerra Perez Jose Manuel Procedimiento de determinacion de la posicion y estado de un objeto en una superficie cualquiera por medio de ultrasonidos
ES2097630T3 (es) * 1992-11-17 1997-04-01 Lectra Systemes Sa Procedimiento y dispositivo de adquisicion y de tratamiento de informaciones graficas.
FR2698191A1 (fr) * 1992-11-17 1994-05-20 Lectra Systemes Sa Procédé et dispositif d'acquisition et de traitement d'informations graphiques.
WO1995014286A1 (fr) * 1993-11-17 1995-05-26 Microsoft Corporation Systeme de saisie informatique a crayon sans fil
JPH0922324A (ja) * 1995-07-05 1997-01-21 Canon Inc 座標入力装置
US6731270B2 (en) * 1998-10-21 2004-05-04 Luidia Inc. Piezoelectric transducer for data entry device
JP2001236451A (ja) * 2000-02-21 2001-08-31 Oki Data Corp 電子帳票作成システム

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2388077A (en) * 2002-02-08 2003-11-05 Virtual Ink Corp Recording writing performed on a surface
US7109979B2 (en) 2002-02-08 2006-09-19 Virtual Ink Corporation System and method for recording writing performed on a surface
WO2009143911A1 (fr) * 2008-05-29 2009-12-03 Sony Ericsson Mobile Communications Ab Stylet d'écran tactile sans fil
CN102375624A (zh) * 2010-08-27 2012-03-14 刘中华 平板结构的超声波手写板
WO2020070009A1 (fr) 2018-10-02 2020-04-09 Novozymes A/S Ribonucléases d'endonucléase 1 pour le nettoyage

Also Published As

Publication number Publication date
DE10196652T1 (de) 2003-08-07
CN1493057A (zh) 2004-04-28
AU2001289143A1 (en) 2002-04-02
WO2002025577A3 (fr) 2003-03-13
GB2381640B (en) 2005-02-23
GB0303837D0 (en) 2003-03-26
GB2381640A (en) 2003-05-07

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