EP1614022A1 - Dispositif de pointage - Google Patents

Dispositif de pointage

Info

Publication number
EP1614022A1
EP1614022A1 EP04726924A EP04726924A EP1614022A1 EP 1614022 A1 EP1614022 A1 EP 1614022A1 EP 04726924 A EP04726924 A EP 04726924A EP 04726924 A EP04726924 A EP 04726924A EP 1614022 A1 EP1614022 A1 EP 1614022A1
Authority
EP
European Patent Office
Prior art keywords
image
pointing device
light emitting
light
acquisition 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.)
Withdrawn
Application number
EP04726924A
Other languages
German (de)
English (en)
Inventor
Yoon Soo Kim
Sung Chul Juh
Seung Hai Oh
Kyu Deuk Cho
Tae Woo Kim
Dong Jung Yong
Jae Young Jo
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.)
Mobisol Inc
Original Assignee
Mobisol Inc
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
Priority claimed from KR10-2003-0022936A external-priority patent/KR100465969B1/ko
Priority claimed from KR1020040016664A external-priority patent/KR100613705B1/ko
Priority claimed from KR1020040016965A external-priority patent/KR100609346B1/ko
Priority claimed from KR1020040016738A external-priority patent/KR100650623B1/ko
Application filed by Mobisol Inc filed Critical Mobisol Inc
Publication of EP1614022A1 publication Critical patent/EP1614022A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means

Definitions

  • the present invention relates to a pointing device and, more particularly, to a pointing device to operate a handheld terminal using a finger.
  • Pointing devices generally include XY tablets, trackballs and mouse that are used for stationary devices such as desktop computers, and touch screen panels (hereinafter referred to as "TSPs") and touch pads that are used for portable electronic devices such as notebook computers.
  • TSPs touch screen panels
  • the XY tablet is a means for calculating position variation of the magnetic field, which is generated by the flow of electric current, with a separate magnetic field sensor.
  • electric currents are successively applied to a lattice consisting of two-dimensional conductors toward X or Y direction to generate a magnetic field.
  • the XY tablet comprises a magnetic field sensor connected with an XY tablet body.
  • the trackball includes an appropriate fixing member to prevent a rolling spherical ball from getting derailed, and at least two rotation speed detectors that detect the rotation of the ball.
  • the trackball represents the rotation of the ball as two-dimensional movement using the rotation speed detectors.
  • the ball mouse is a device applying the principle of the trackball by contraries.
  • the trackball device instead of a ball, the trackball device itself moves to rotate the ball relatively. Therefore, the ball mouse represents the two- dimensional movement using the movement of the trackball device itself.
  • the TSP includes two flat resistance films positioned adjacently each other.
  • the resistance films in the pressed point contact each other to form a resistance circuit.
  • the position of contact between the resistance films can be calculated two-dimensionally.
  • Fig. 1 is a schematic diagram illustrating a conventional optical mouse device.
  • the optical mouse device has a two-dimension optical sensor array (10) that comprises CMOS image sensors (hereinafter referred to as "CIS").
  • an optical means (15) such as a lens is added to the two- dimension optical sensor array (10) to perceive relative coordinates of the mouse position through reflective light from a surface (20). There is no change of the coordinates if the optical mouse is not moved. If the optical mouse moves, the coordinates of the optical mouse change.
  • Such an optical mouse device calculates the movement distance of the optical mouse using an appropriate operation means (25) and a motion detector (30) based on the coordinate change.
  • the motion detector (30) adopts a motion estimation method.
  • the conventional optical mouse sends light through a hole (40) formed through the bottom of its casing (35) toward the surface (20) of an object on which the optical mouse is positioned.
  • the light emitting means is generally a light emitting diode (LED).
  • the conventional optical mouse device adopts a structure to minimize errors caused by specular light directly reflected from the surface (20).
  • the TSP can activate a desired icon by pressing the icon with a sharp-end tool to operate a machine.
  • the TSP requires users to use both hands, holding the TSP by one hand and using the sharp-end tool by the other hand.
  • users are disabled to use the TSP whenever the sharp-end tool is mislocated or not available.
  • the ball mouse and optical mouse are difficult to be applied to portable electronic devices of small size because of the intrinsic limitations of their movement structure.
  • Fig. 2 shows an example of a portable electronic device having a conventional pointing device.
  • Fig. 2 shows a notebook with a pointing device
  • all portable electronic devices including PDA (personal digital assistance) as well as the notebook can employ the pointing device.
  • the notebook (50) has a flat-panel display and GUI (graphic user interface) to maximize user's convenience. Users need to use a pointing device such as a touch pad (70), a TSP or a mouse to utilize GUI of the portable electronic device.
  • GUI graphic user interface
  • the mouse device can be coupled to a connection port of the portable electronic device, but, in this case, the user has to carry separately the mouse with the portable electronic device.
  • Korean Patent Publication No. 2002-14430 discloses a portable wireless information terminal having a pointing device to effectively utilize application programs under the GUI environment.
  • the pointing device which includes a ball and a sensor for sensing rotational position, is mounted on the lower side of the information terminal to freely move a cursor on an LCD (liquid crystal display).
  • LCD liquid crystal display
  • the present invention provides a pointing device comprising a light emitting means for illuminating a subject; a hole through which light from the light emitting means is transmitted; an image-acquisition area for taking an image of the subject from the transmitted light; an image-formation means for forming an image by focusing the light reflected from the image-acquisition area; a conversion means for converting the image formed by the image-formation means into an electric signal; and an operation means for detecting the change of the image and calculating the amount of the change using the electric signal output from the conversion means.
  • the subject is preferably the surface of a finger, a lattice, or any perceivable pattern.
  • the present invention provides a pointing device comprising a light emitting means; a light guide structure for guiding light from the light emitting means to a subject; an image-acquisition area for taking an image of the subject from the guided light; an image-formation means for forming an image by focusing the light reflected from the image-acquisition area; a conversion means for converting the image formed by the image-formation means into an electric signal; and an operation means for detecting the change of the image and calculating the amount of the change using the electric signal output from the conversion means.
  • the subject is preferably the surface of a finger, a lattice, or any perceivable pattern.
  • the present invention provides a pointing device comprising a light emitting means; a light guide structure for guiding light from the light emitting means to a subject; an image-acquisition area for taking an image of the subject from the guided light; an image-formation means for forming an image by focusing the light reflected from the image-acquisition area; a housing coupled to the image-formation means; a conversion means for converting the image formed by the image-formation means into an electric signal; a printed circuit board on which the conversion means is fixed; a cover for protecting the light emitting means, the image-formation means, the housing, the conversion means, and the printed circuit board; and an operation means for detecting the change of the image and calculating the amount of the change using the electric signal output from the conversion means.
  • Fig. 1 is a schematic diagram illustrating a conventional optical mouse device
  • Fig. 2 shows an example of a portable electronic device having a conventional pointing device
  • Fig. 3 is a schematic diagram illustrating a pointing device according to an embodiment of the present invention.
  • Fig. 4 is a schematic diagram illustrating a pointing device according to another embodiment of the present invention.
  • Fig. 5 is a schematic diagram illustrating a pointing device according to a third embodiment of the present invention.
  • Fig. 6 shows examples of subjects available for a pointing device according to the present invention
  • Fig. 7 is a diagram illustrating how the pointing device of the present invention works
  • Fig. 8 shows an example of portable electronic device mounted with a pointing device according to the present invention
  • Fig. 9 is a schematic diagram illustrating a pointing device with a contact sensor according to the present invention
  • Fig. 10 is a schematic diagram illustrating a two-dimensional pointing device with an integral structure
  • Fig. 11 is a schematic diagram illustrating a pointing device according to another embodiment of the present invention.
  • Fig. 12 shows an example of portable electronic device equipped with a pointing device according to the present invention.
  • Fig. 3 is a schematic diagram of a pointing device in accordance with an embodiment of the present invention.
  • the pointing device of the present invention calculates the distance and direction for a pointer to be moved by acquiring and analyzing an image formed by light that is transmitted from a light emitting means (100) to a contact subject (110).
  • This method presents a similar effect to that of an optical mouse, which moves on the fixed surface of a desk or a flat part.
  • the pointer means an indicator on a screen of display device, which is moved by a pointing device such as a mouse.
  • a pointing device is mounted on a portable electronic device and acquires changing images.
  • a user can conveniently control a pointer on the screen of portable electronic device using the surface of his/her finger.
  • the movement of a finger causes the change of image in the image- acquisition area.
  • the distance and direction for the pointer to be moved can be calculated through the analysis of the change of image due to the movement of a finger.
  • the pointing device comprises a light emitting means (100), an image-acquisition area (not shown), an image-formation means (120), a conversion means (130), a motion detector (140), and an operation means (150). These component parts are described in detail.
  • the light emitting means (100) emits light to illuminate a contact subject (110) controlling a pointer.
  • the contact subject (110) is preferably the surface of a user's finger, a lattice, or any perceivable pattern.
  • the light emitting means (100) is preferably an LED, a laser diode, or an organic electroluminescence.
  • the image-acquisition area (not shown) acquires movement data using the light illuminated from the light emitting means (100).
  • the image-acquisition area is positioned at a predetermined distance from the image-formation means (120).
  • the image-acquisition area is preferably a housing with a transparent member whose surface in contact with the contact subject (110) is flat and made of transparent material.
  • the housing is preferably coated to prevent the surface of the image-acquisition area from damage or contamination. Additionally, the image-acquisition area may be a virtual plane positioned at a predetermined distance from the image-formation means (120).
  • the image-formation means (120) forms an image on the opposite side by focusing the light reflected from the image-acquisition area.
  • the image-formation means (120) may be an optical lens, preferably a spherical or non-spherical lens or a mirror.
  • the conversion means (130) detects the analog image formed by the image-formation means (120) and converts it into a digital image.
  • the conversion means (130) is preferably an optical sensor array in which a plurality of CMOS image sensors or CCD (charge coupled device) image sensors are arranged in two-dimensional form.
  • the motion detector (140) perceives the extent of movement through the digital image received from the conversion means (130) using a motion estimation method.
  • the motion detector (140) uses a motion estimator.
  • the operation means (150) receives the extent of movement, e.g., shift data from the motion detector (140) and calculates the distance and direction for the pointer to be moved.
  • the operation means (150) is coupled to the pointing device or the processor of a machine on which the pointing device is mounted. Accordingly, the processor can control the pointer on the screen of a display device so that it can be freely moved toward a desired direction by a desired distance.
  • the reference number 160 is a casing of a pointing device or a casing of a portable electronic device equipped with the pointing device.
  • the reference number 170 is a hole formed through the casing (160). The light from the light emitting means (100) is reflected from the finger surface through the hole (170).
  • the light from a light emitting diode is illuminated onto the finger surface and reflected according to a pattern of the finger surface.
  • the light reflected from the finger surface forms an image on the surface of the CMOS image sensor or CCD image sensor array through the lens.
  • the formed image is converted into an electric signal by the CMOS image sensor or the CCD image sensor array and entered into a signal processing part to be changed into a digital image.
  • the above-mentioned image acquisition is performed very rapidly on a real-time base.
  • the motion estimator detects the extent of change between images by comparing the images formed in two adjacent time sequences.
  • the detected movement implies movement of a finger in the adjacent time sequences.
  • the present invention can embody the pointing device such as a mouse device of a computer using the finger movement.
  • a conventional mouse device needs a large flat area on which the mouse device is moved, but the present invention can embody the pointing device within a small space by minimizing the size of the image-acquisition area.
  • Figs. 4 and 5 are schematic diagrams illustrating a pointing device according to embodiments of the present invention.
  • the pointing device illustrated in Fig. 4 additionally comprises a transparent plate (180) and another LED (104) compared to the pointing device in Fig. 3.
  • the change of distance between the fmger surface and the image-acquisition area causes images to be unclear, thereby making the movement analysis difficult.
  • the transparent plate (180) to shorten the focal length of lens, the pointing device of the present invention can avoid this problem.
  • the present invention employs the transparent plate (180) so that the finger moves on the flat area.
  • the fmger surface (110) moves, the dimension and position of the shadow of the finger may change to cause error because of an outside three-dimension lighting. This problem can be solved with two LEDs (102, 104).
  • the pointing device additionally comprises a light guide structure (190).
  • the light guide structure (190) transforms the light transmitted to the transparent plate (180) into the light similar to planar light, thereby minimizing error occurrence due to change of lighting conditions and distributing uniformly the light from the light emitting means (100) to constantly maintain desired brightness in the predetermined area.
  • the factors related to the light guide structure (190) are adjusted appropriately in order to minimize transmission loss of light or image.
  • Fig. 6 shows examples of subjects available for a pointing device according to the present invention.
  • (a) is the fingerprint of a finger
  • (b) is a lattice
  • (c) is an example of any perceivable pattern.
  • the pointing device in accordance with the present invention preferably uses the surface of a finger, a lattice or a perceivable pattern as the contact subject.
  • Fig. 7 is a diagram illustrating how the pointing device of the present invention works.
  • area D (230) is an image after the area C (220) moves 2 pixels to the left and 3 pixels upward during a predetermined time T2.
  • the pointing device in accordance with the present invention can recognize the direction and distance of a movement made.
  • Fig. 8 shows a portable electronic device equipped with a pointing device according to the present invention.
  • the portable electronic device (300) includes a PDA.
  • the PDA is equipped with the above-mentioned pointing device (310).
  • the pointing device (310) is not exposed outside and a cross-shaped mark (320) is printed on the location of the pointing device (310) to represent the place on which a fmger, for example, is positioned to control a pointer.
  • the portable electronic device (300) additionally comprises at least a selection button (330) connected to the pointing device (310).
  • the selection button (330) is used to select a target with the pointer moved by the pointing device (310) or to enter a command.
  • the portable electronic device additionally comprises at least a selection button (330) connected to the pointing device (310).
  • the selection button (330) is used to select a target with the pointer moved by the pointing device (310) or to enter a command.
  • the portable electronic device (300) additionally comprises at least a selection button (330) connected to the pointing device (310).
  • the selection button (330) is used to select a target with the pointer moved by the pointing device (310) or to enter a command.
  • (300) uses a secondary battery as a main power source.
  • Fig. 9 is a schematic diagram illustrating a pointing device with a contact sensor according to the present invention.
  • the light emitting means in a portable electronic device has to be operated only during the use of the pointing device because a considerable electric power is required to operate the light emitting means. Therefore, as a means to determine if the pointing device is in use, a contact sensor (350) is attached around the image-acquisition area. When a finger touches the contact sensor (350) or is placed near the contact sensor (350), the control part (360) operates the light emitting means so that the pointing device begins to work.
  • the contact sensor (350) may preferably perform the role of selection switch, which is similar to double-click of a conventional mouse device, for selecting the present position or a predetermined function indicated by a pointer, based on a predetermined time interval for which the fmger touches.
  • selection switch For the role of the selection switch, "contact”, “non-contact”, and “contact have to be performed in sequence in a short time interval.
  • the contact sensor (350) may be internally connected with on-off terminals of the conversion means and the light emitting means so as to control the on or the off state of the conversion means and the light emitting means according to the "contact” or “non-contact” status with the subject using hardware.
  • the output of the contact sensor (350) may be connected with the control part (210) so as to control the on or the off state of the conversion means and the light emitting means using software.
  • the contact sensor (350) is preferably placed around the image acquisition area within a radius of about 3 cm from the center of the image acquisition area and can be embodied by both contact and non-contact fashion.
  • the portable electronic device with the pointing device may be programmed so that the contact sensor operates the pointing device in case of a program requiring the pointing device and the pointing device is turned off in case of a program requiring no pointing device.
  • the pointing device is automatically turned off by means of an appropriate programming while the game is displayed on a screen.
  • Fig. 10 is a diagram illustrating a two-dimensional pointing device with an integral structure.
  • the pointing device in accordance with the present invention is preferably used for small-sized portable electronic devices such as cellular phones and, therefore, the miniaturization of the pointing device is essential.
  • the spherical or non-spherical lens is united into the integral structure as a part.
  • Such an integral structure improves operation efficiency and productivity by minimizing occurrence of defectiveness due to tolerance in assembling.
  • a printed circuit board (420) is installed into the housing (410).
  • the light emitting means (440), the conversion means (450), and parts containing circuits for operation are mounted on the printed circuit board (420).
  • a cover (430) is used to maintain constantly the shape of the finger surface in contact with the area in the top of the pointing device.
  • the cover (430) can protect the light emitting means (440), the image-formation means (400), the housing (410), the conversion means (450), and the printed circuit board (420) from contamination such as dust.
  • Fig. 11 is a schematic diagram illustrating a pointing device according to another embodiment of the present invention.
  • Fig. 12 shows an example of a portable electronic device equipped with the pointing device according to the present invention.
  • the pointing device in a small-size portable electronic device such as a cellular phone is preferably embodied by the selection method using pressure.
  • a contact area (510) on the top of the united pointing device module (500) and a switch (520) under the pointing device module (500). If the contact area (510) is pressed, the pointing device module (500) capable of moving up and down operates the switch (520).
  • the switch (520) When the pointing device module (500) is pressed to operate the switch (520), a graphic icon indicated by a pointer (540) on a screen (530) is selected and, then, the corresponding function is performed.
  • the pointing device of the present invention may employ the surface of a palm, the surface of the back of a hand, and all types of objects with a surface similar to a finger surface as well as the finger surface as a means to control the pointer.
  • the foregoing embodiments are merely exemplary and are not to be construed as limiting the present invention.
  • the present teachings can be readily applied to other types of apparatuses.
  • the description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art.
  • the pointing device in accordance with the present invention can be embodied in a small space through the minimization of the image-acquisition area.
  • the pointing device needs not a mouse pad or a flat surface.
  • the pointing device can be embodied on portable electronic devices such as cellular phones and PDAs because it is small in size.

Landscapes

  • 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 dispositif de pointage pour faire fonctionner un dispositif électronique portable avec un doigt. Ce dispositif de pointage comporte un dispositif lumineux pour éclairer un sujet, un orifice traversé par la lumière émise par le dispositif lumineux, une zone d'acquisition d'images pour prendre une vue du sujet au moyen de la lumière transmise, un dispositif d'imagerie pour réaliser une image par focalisation de la lumière réfléchie par la zone d'acquisition d'images, un dispositif de conversion pour convertir l'image formée par le dispositif d'imagerie en signal électrique, et un dispositif opérationnel pour détecter le changement d'image et calculer le nombre de changements au moyen des signaux électriques émis par le dispositif de conversion. Le sujet est de préférence la surface d'un doigt, un réseau ou tout autre modèle perceptible. De faibles dimensions, ce dispositif de pointage peut être intégré dans des dispositifs électroniques portables tels que des téléphones cellulaires et des assistants numériques personnels.
EP04726924A 2003-04-11 2004-04-12 Dispositif de pointage Withdrawn EP1614022A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR10-2003-0022936A KR100465969B1 (ko) 2003-04-11 2003-04-11 손가락 표면을 이용한 소형 포인팅 장치
KR1020040016664A KR100613705B1 (ko) 2004-03-11 2004-03-11 2차원 포인팅 장치
KR1020040016965A KR100609346B1 (ko) 2004-03-12 2004-03-12 터치센서가 부착된 포인팅 장치
KR1020040016738A KR100650623B1 (ko) 2004-03-12 2004-03-12 스위치 기능을 갖는 광학식 포인팅 장치
PCT/KR2004/000840 WO2004090709A1 (fr) 2003-04-11 2004-04-12 Dispositif de pointage

Publications (1)

Publication Number Publication Date
EP1614022A1 true EP1614022A1 (fr) 2006-01-11

Family

ID=33163093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04726924A Withdrawn EP1614022A1 (fr) 2003-04-11 2004-04-12 Dispositif de pointage

Country Status (3)

Country Link
EP (1) EP1614022A1 (fr)
JP (1) JP2006522981A (fr)
WO (1) WO2004090709A1 (fr)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
KR100639681B1 (ko) * 2005-07-04 2006-10-30 주식회사 애트랩 광 마우스 및 광 마우스 시스템 및 이들의 방법
US20080134102A1 (en) * 2006-12-05 2008-06-05 Sony Ericsson Mobile Communications Ab Method and system for detecting movement of an object
TWI380196B (en) 2007-12-25 2012-12-21 Pixart Imaging Inc Method for detecting users' pressing action and optical operating unit

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JPH03291716A (ja) * 1990-04-10 1991-12-20 Toshiba Corp ポインティングデバイス
JPH06259176A (ja) * 1993-03-09 1994-09-16 Kubota Corp データ入力装置
JPH08179878A (ja) * 1994-12-21 1996-07-12 Sharp Corp コンピュータ用入力装置
JP3473888B2 (ja) * 1997-08-04 2003-12-08 シャープ株式会社 入力装置
US6057540A (en) * 1998-04-30 2000-05-02 Hewlett-Packard Co Mouseless optical and position translation type screen pointer control for a computer system
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JP2002062983A (ja) * 2000-08-21 2002-02-28 Hitachi Ltd ポインティングデバイス
ATE463004T1 (de) * 2000-11-06 2010-04-15 Koninkl Philips Electronics Nv Verfahren zur messung der bewegung eines eingabegeräts
US6795056B2 (en) * 2001-07-24 2004-09-21 Agilent Technologies, Inc. System and method for reducing power consumption in an optical screen pointing device
JP4022090B2 (ja) * 2002-03-27 2007-12-12 富士通株式会社 指の動きの検出方法および検出装置

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Also Published As

Publication number Publication date
JP2006522981A (ja) 2006-10-05
WO2004090709A1 (fr) 2004-10-21

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