FR2483100A1 - Pen for drawing on graphic panel - contains piezoelectric element connected to processing circuits and providing validation signal when sufficient writing pressure is applied - Google Patents

Pen for drawing on graphic panel - contains piezoelectric element connected to processing circuits and providing validation signal when sufficient writing pressure is applied Download PDF

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Publication number
FR2483100A1
FR2483100A1 FR8011561A FR8011561A FR2483100A1 FR 2483100 A1 FR2483100 A1 FR 2483100A1 FR 8011561 A FR8011561 A FR 8011561A FR 8011561 A FR8011561 A FR 8011561A FR 2483100 A1 FR2483100 A1 FR 2483100A1
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FR
France
Prior art keywords
tip
conductive
cartridge
pen
pressure
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.)
Granted
Application number
FR8011561A
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French (fr)
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FR2483100B1 (en
Inventor
Maurice Gaude
Claude Joubert
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OPTION SA
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OPTION SA
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Filing date
Publication date
Application filed by OPTION SA filed Critical OPTION SA
Priority to FR8011561A priority Critical patent/FR2483100B1/en
Publication of FR2483100A1 publication Critical patent/FR2483100A1/en
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Publication of FR2483100B1 publication Critical patent/FR2483100B1/en
Expired legal-status Critical Current

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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
    • G06F3/03—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
    • 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
    • G06F3/03—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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0441—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals

Abstract

The pen has a metallic body and a metallic ink cartridge which is insulated from it by an insulating ring and a sleeve at the tip. A coaxial connector is engaged in the pen body opposite the tip and is connected via coaxial cable to processing circuits associated with the graphic panel. A piezo electric element is in contact with the central conductor in the connector. The element also contacts the cartridge via a pressure washer. This enables a validation signal to be generated when a given writing pressure is attained. A loaded spring is used to urge the cartridge and tip towards the graphic panel.

Description

L'invention se rapporte aux styles destinés à 1 l'inscrip- tion d'un tracé et à la détection, par effet capacitif du signal résultant de cette inscription, sur une tablette graphique comportant un réseau de barres conductrices excitées séquentiel i ement.  The invention relates to styles intended for writing a trace and for detecting, by capacitive effect of the signal resulting from this writing, on a graphic tablet comprising a network of conductive bars sequentially excited.

On sait que, dans ce genre de tablettes graphiques,
le style capte, à chaque instant au cours de l'inscription, un signal représentatif de la position de sa pointe sur la feuille de papier supportée par la tablette. Un câble coaxial relie la pointe conductrice d'écriture que comporte le style, et qui est elle même alimentée par une cartouche d'encre, aux circuits de traitement des signaux qui sont associés à la tablette.We know that in this kind of graphics tablet,
the style picks up, at each instant during registration, a signal representative of the position of its tip on the sheet of paper supported by the tablet. A coaxial cable connects the conductive writing tip that includes the style, and which is itself supplied by an ink cartridge, to the signal processing circuits which are associated with the tablet.

On a imaginé des styles relativement complexes, qui ne sont pas parfaitement insensibles aux signaux parasites dûs aux effets de main ou à des rayonnements électromagnétiques extérieurs et ne permettent pas d'éliminer toute traitée entre les lettres ou signes inscrits, c est-à-dire de supprimer la détection de signaux lorsque le style n'est pas en contact franc avec le papier, tout en étant à proximité suffisante de celui-ci pour que l'effet de captage capacitif se manifeste. We have imagined relatively complex styles, which are not perfectly insensitive to parasitic signals due to hand effects or external electromagnetic radiation and do not make it possible to eliminate any processed between the letters or signs inscribed, that is to say to suppress the detection of signals when the style is not in frank contact with the paper, while being in sufficient proximity of the latter so that the capacitive sensing effect is manifested.

Dans le brevet français n" 78.29463 deposé le 9 Octobre 1978 et sa première addition, on a décrit un style du genre susvisé, réalisé à partir d'un stylo à bille de modèle courant et susceptible de procurer la sensation normale de l'écriture, grâce à la suppression des tralnees.  In the French patent No. 78.29463 filed on October 9, 1978 and its first addition, a style of the aforementioned genre has been described, produced from a ballpoint pen of current model and capable of providing the normal feeling of writing, thanks to the elimination of delays.

Un tel style comprend une cartouche d'encre raccor ée à une pointe conductrice d'écriture, un corps isolé de ladite pointe et dont la surface extérieure comporte au moins une portion de surface conductrice et des organes de rérac- tion de la pointe à l'intérieur du corps lorsque la pointe est soumise à une pression et est caractérisé par un élément conducteur coaxial logé dans ledit corps et dont le conducteur extérieur est raccordé à ladite portion conductrice et
par des moyens de relier électriquement le conducteur inté-
rieur de l'élément coaxial à ladite pointe lorsqu'une pres
sion suffisante est exercée sur ladite pointe.Such a style comprises an ink cartridge connected to a conductive writing tip, a body insulated from said tip and the outer surface of which comprises at least one portion of conductive surface and organs for reacting from tip to tip. inside the body when the tip is subjected to a pressure and is characterized by a coaxial conductive element housed in said body and the outer conductor of which is connected to said conductive portion and
by means of electrically connecting the internal conductor
laughing of the coaxial element at said point when a pres
Sufficient pressure is exerted on said tip.

Suivant un premier mode de réalisation, décrit au
brevet susvi-se, ledit élément conducteur coaxial est un câble coaxial logé dans le corps du stylo et lesdits moyens sont constitués par une liaison permanente entre le conducteur intérieur de ce câble coaxial et la pointe et par un Ble- ment conducteur court-circuitant cette liaison lorsqu'aucune pression n'est exercée sur la pointe, cet élément conducteur étant disposé de manière à cesser d'être en contact avec la pointe et de court-circuiter ladite liaison dès qu'une pression prédéterminée est exercée sur la pointe.According to a first embodiment, described in
above patent, said coaxial conductive element is a coaxial cable housed in the body of the pen and said means are constituted by a permanent connection between the inner conductor of this coaxial cable and the tip and by a conductive ball shorting this connection when no pressure is exerted on the tip, this conductive element being arranged so as to cease to be in contact with the tip and to short-circuit said connection as soon as a predetermined pressure is exerted on the tip.

Suivant un second mode de réalisation décrit, dans la premiere addition, ledit élément conducteur coaxial est une prise coaxiale vissée dans l'extrémité du stylo opposée à la pointe, en contact direct avec le corps conducteur du stylo et, la cartouche étant conductrice, le conducteur intérieur de ladite prise coaxiale est raccordé à ladite cartouche par l'intermédiaire desdits moyens. According to a second embodiment described, in the first addition, said coaxial conductive element is a coaxial plug screwed into the end of the pen opposite the tip, in direct contact with the conductive body of the pen and, the cartridge being conductive, the inner conductor of said coaxial socket is connected to said cartridge through said means.

Suivant la présente invention, qui a pour objet une forme d'exécution préférée de ce second mode de réalisation, lesdits moyens sont constitués par une pastille piézo-conductrice ou piezo-electrique insérée entre ladite cartouche et ledit conducteur interieur. According to the present invention, which relates to a preferred embodiment of this second embodiment, said means consist of a piezo-conductive or piezoelectric pad inserted between said cartridge and said inner conductor.

D'autres particularités, ainsi que les avantages de l'invention, apparaîtront clairement à la lumière de la description détaillée ci-après. Other features, as well as the advantages of the invention, will become clear in the light of the detailed description below.

La figure unique du dessin annexé est une vue en coupe d'un style conforme à la présente invention, les mêmes numéros de référence y designant des éléments homologues à ceux de la figure 4 de la premiere addition. The single figure of the accompanying drawing is a sectional view of a style according to the present invention, the same reference numbers designating elements homologous to those of Figure 4 of the first addition.

Ce style est constitué par une cartouche d'un stylo à bille du commerce, dont la partie 6 qui contient l'encre est conductrice et se termine par une coque de laiton contenant une bille d'acier. La pointe d'écriture 61 de cette coque doit être reliee à un câble blindé non figuré, lui-même relié aux circuits de traitement des signaux qui sont associés à la
tablette graphique. Le mécanisme de rétraction usuel, non figuré, est conservé.This style consists of a cartridge of a commercial ballpoint pen, whose part 6 which contains the ink is conductive and ends in a brass shell containing a steel ball. The writing tip 61 of this shell must be connected to a shielded cable not shown, itself connected to the signal processing circuits which are associated with the
graphic tablet. The usual retraction mechanism, not shown, is preserved.

Le corps 5 est metallique et la cartouche 6 en est isolée à son extrémité arrière oppose à la pointe 61 par une bague isolante 62.  The body 5 is metallic and the cartridge 6 is isolated therefrom at its rear end opposite the tip 61 by an insulating ring 62.

Une prise coaxiale 7 de modèle courant est raccor dée au câble coaxial et est engagée dans le corps 5 a l'ex- trémite arrière ouverte de celui-ci , de façon que son conducteur extérieur soit en contact avec ledit corps
Le conducteur central 70 de cette prise n'est mis en contact avec l'extrémité arrière de la cartouche métallique 6 que par l'intermédiaire d'une pastille piézo-conductrice ou piezo-electrique 64, sur une face de laquelle est déposée une rondelle de pression 65, tandis qu'une seconde rondelle de pression 66 est soudée sur le conducteur 70.A coaxial socket 7 of current model is connected to the coaxial cable and is engaged in the body 5 at the open rear end of the latter, so that its external conductor is in contact with said body.
The central conductor 70 of this socket is brought into contact with the rear end of the metal cartridge 6 only by means of a piezo-conductive or piezoelectric pellet 64, on one face of which a washer is deposited 65 pressure, while a second pressure washer 66 is welded to the conductor 70.

On a figuré en 67 un ressort de rappel monte sur le corps 6 et qui exerce une pression initiale pO de la cartouche 6 sur la pastille 64. There has been shown at 67 a return spring mounted on the body 6 and which exerts an initial pressure pO of the cartridge 6 on the pad 64.

Lorsque la pastille 64 est piézo-conductrice (matière plastique appropriée), sa résistance est, par exemples supérieure à 1M Q tant que la pression qu'elle subit est inférieure à une valeur pi9 et inférieure ou égale à 100 a des que la pression est supérieure à p1. La pression initiale pO est nettement inférieure à P1s si bien que, tant que la pointe 61 n'est pas en contact avec le papier9 la pastille 64 isole les signaux captés par le stylo par effet capacitif au voisinage immédiat de la tablette graphique. When the pellet 64 is piezo-conductive (suitable plastic material), its resistance is, for example greater than 1M Q as long as the pressure which it undergoes is less than a value pi9 and less than or equal to 100 as soon as the pressure is greater than p1. The initial pressure pO is much lower than P1s so that, as long as the tip 61 is not in contact with the paper9 the pad 64 isolates the signals picked up by the pen by capacitive effect in the immediate vicinity of the graphics tablet.

Toute traînée est donc supprime.Any drag is therefore removed.

Lorsque la pointe 61 écrit, la pression p dDécri- ture s'ajoute à pO et9 comme p + pO est alors supérieur à
P19 la cartouche se trouve reliée électriquement à la prise5 à travers une résistance suffisamment faible pour que le signal capté soit transmis aux circuits de traitement relies à la prise.When the tip 61 writes, the pressure p dDescription is added to pO et9 as p + pO is then greater than
P19 the cartridge is electrically connected to the socket 5 through a sufficiently low resistance so that the signal picked up is transmitted to the processing circuits connected to the socket.

La sensibilité de détection peut être réglée en agissant sur la raideur du ressort ou la surface des rondelles de pression 65 et 66. The detection sensitivity can be adjusted by acting on the stiffness of the spring or the surface of the pressure washers 65 and 66.

Le blindage formé par le conducteur extérieur de la prise 7 et le corps 5 du stylo est complété par une couche de colle conductrice 81, figurée en trait mixte et qui recou- vre partiellement la surface de l'embout isolant 89 sans, bien entendu, être raccordée à la pointe.  The shielding formed by the external conductor of the socket 7 and the body 5 of the pen is completed by a layer of conductive adhesive 81, shown in phantom and which partially covers the surface of the insulating end piece 89 without, of course, be connected to the tip.

Dans la variante ou la pastille 64 est en céramique piézo-électrique, la pression d'écriture engendre à ses bornes une force électro-motrice continue, proportionnelle à p ±pO Cette force electro-motrice, en série avec le signal capté, est détectée, de façon connue en soi, par les circuits de traitement. Lorsqu'elle atteint un seuil prédéterminé, un signal de validation est engendre par un comparateur incorporé auxdits circuits. Ce signal sert à valider le signal capté. In the variant where the pad 64 is made of piezoelectric ceramic, the writing pressure generates at its terminals a continuous electro-motive force, proportional to p ± pO This electro-motive force, in series with the sensed signal, is detected , in a manner known per se, by the processing circuits. When it reaches a predetermined threshold, a validation signal is generated by a comparator incorporated in said circuits. This signal is used to validate the signal received.

I1 suffit, à cet effet, d'appliquer le signal capté et le signal de validation aux deux entrées d'une porte ET. For this purpose, it suffices to apply the sensed signal and the validation signal to the two inputs of an AND gate.

La sensibilité de la détection de contact est réglable en agissant sur la raideur du ressort de rappel C7 ou sur la tension de référence appliquée au comparateur et qui définit le seuil. The sensitivity of the contact detection is adjustable by acting on the stiffness of the return spring C7 or on the reference voltage applied to the comparator and which defines the threshold.

Il va de soi que diverses modifications de detail pourront être apportees aux dispositifs décrits et représenté, sans s'écarter de l'esprit de l'invention.  It goes without saying that various modifications of detail can be made to the devices described and shown, without departing from the spirit of the invention.

Claims (4)

REVENDICATIONS 1- Style destiné à l'inscription d'un tracé et à la détection, par effet capacitif, du signal résultant de cette inscription, sur une tablette graphique comportant un réseau de barres conductrices excitées séquentiellemènt, ledit style comprenant : une cartouche d'encre (6) raccordée à une pointe conductrice d'écriture (61) ; un corps (5) isolé de ladite pointe et dont la surface extérieure comporte au moins une portion de surface conductrice ; des organes de retraction de la pointe à l'intérieur du corps lorsque la pointe est soumise à une pression ; une prise coaxiale (7) vissée dans l'extrémité dudit corps opposée à la pointe et dont le conducteur extérieur est en contact direct avec ladite portion conductrice et des moyens de relier électriquement le conducteur intérieur de la prise coaxia à ladite pointe lorsqu'une pression suffisante est exercee sur ladite pointe, caractérisé en ce que lesdits moyens sont constitués par une pastille piézo-conductrice ou píezo-electrique (64) insérée entre ladite cartouche et ledit conducteur intérieur. 1- Style intended for the recording of a trace and for the detection, by capacitive effect, of the signal resulting from this recording, on a graphic tablet comprising a network of conductive bars excited sequentially, said style comprising: an ink cartridge (6) connected to a conductive writing tip (61); a body (5) insulated from said tip and the outer surface of which comprises at least one portion of conductive surface; tip retraction members within the body when the tip is subjected to pressure; a coaxial socket (7) screwed into the end of said body opposite the tip and the outer conductor of which is in direct contact with said conductive portion and means for electrically connecting the inner conductor of the coaxial socket to said tip when a pressure sufficient is exerted on said tip, characterized in that said means are constituted by a piezo-conductive or piezoelectric pad (64) inserted between said cartridge and said inner conductor. 2- Style selon la revendication 19 caractérisé par un ressort taré (67) rappelant ladite pointe et ladite cartouche en direction de ladite pastille. 2- Style according to claim 19 characterized by a calibrated spring (67) recalling said tip and said cartridge in the direction of said pellet. 3- Style selon la revendication 1 ou 25 caractérisé par deux rondelles de pression (659 66) respectivement disposees entre ledit conducteur intérieur et ladite pastille9 et entre ladite pastille et ladite cartouche. 3- Style according to claim 1 or 25 characterized by two pressure washers (659 66) respectively arranged between said inner conductor and said pad9 and between said pad and said cartridge. 4- Style selon l'une des revendications 1 à 3, comportant un embout isolant (8) disposé entre la pointe et le corps du stylo, caract-érisé par une couche conductrice (81) recouvrant partiellement ledit embout et raccordée audit corps.  4- Style according to one of claims 1 to 3, comprising an insulating tip (8) disposed between the tip and the body of the pen, caract-erized by a conductive layer (81) partially covering said tip and connected to said body.
FR8011561A 1980-05-23 1980-05-23 SCRIPTOR STYLE FOR GRAPHIC TABLET, AT THE SAME TIME AS CAPACITIVE SENSOR Expired FR2483100B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8011561A FR2483100B1 (en) 1980-05-23 1980-05-23 SCRIPTOR STYLE FOR GRAPHIC TABLET, AT THE SAME TIME AS CAPACITIVE SENSOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8011561A FR2483100B1 (en) 1980-05-23 1980-05-23 SCRIPTOR STYLE FOR GRAPHIC TABLET, AT THE SAME TIME AS CAPACITIVE SENSOR

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FR2483100A1 true FR2483100A1 (en) 1981-11-27
FR2483100B1 FR2483100B1 (en) 1985-12-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564618A1 (en) * 1984-05-21 1985-11-22 Boukris Alain Device for analysing the vertical and horizontal movements of a pencil in the course of manual writing or drawing
WO2009124602A2 (en) * 2008-04-11 2009-10-15 Sony Ericsson Mobile Communications Ab A pointer device for capacitive sensitive touch screens
EP2221709A3 (en) * 2009-02-24 2013-10-09 Wacom Co., Ltd. Position indicator
US9535515B2 (en) 2013-05-06 2017-01-03 Societe Bic Manual device adapted for a capacitive screen
CN108369458A (en) * 2016-02-05 2018-08-03 株式会社和冠 Electronic pen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962679A (en) * 1974-06-06 1976-06-08 Rca Corporation Handwriting identification technique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962679A (en) * 1974-06-06 1976-06-08 Rca Corporation Handwriting identification technique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564618A1 (en) * 1984-05-21 1985-11-22 Boukris Alain Device for analysing the vertical and horizontal movements of a pencil in the course of manual writing or drawing
WO2009124602A2 (en) * 2008-04-11 2009-10-15 Sony Ericsson Mobile Communications Ab A pointer device for capacitive sensitive touch screens
WO2009124602A3 (en) * 2008-04-11 2010-01-28 Sony Ericsson Mobile Communications Ab A pointer device for capacitive sensitive touch screens
EP2221709A3 (en) * 2009-02-24 2013-10-09 Wacom Co., Ltd. Position indicator
US9535515B2 (en) 2013-05-06 2017-01-03 Societe Bic Manual device adapted for a capacitive screen
US9857891B2 (en) 2013-05-06 2018-01-02 Societe Bic Manual device adapted for a capacitive screen
CN108369458A (en) * 2016-02-05 2018-08-03 株式会社和冠 Electronic pen
CN108369458B (en) * 2016-02-05 2021-05-28 株式会社和冠 Electronic pen

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