EP0347725A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electronic blackboard and accessories such as writing tools
Assignee: Wacom Co Ltd
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Filing: 1989-06-13
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Granted: —
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Expires: 2009-06-13
Abstract
Abstract The present invention discloses an electronic blackboard apparatus comprising an electronic blackboard portion (1), a writing tool (3), an eraser (4), an instruction rod (2), a position detection portion (11), a writing tool determination portion, a data processing portion (5), and an output portion (52). When image information such as characters or figures are drawn on the writing surface (14) of the electronic blackboard portion by using the writing tool, when the region which is intended to be erased of the information which is being displayed is selected by the eraser, or when an assignment is carried out by using the instruction rod, information representing the type of the tool which is being used selected from a group consisting of the writing tool, eraser and instruction rod and the predetermined information about the position are supplied to the data processing portion via the position detection portion or the writing tool determination portion whereby display information corresponding to the display information which has been subjected to a predetermined process or instruction information by means of the instruction rod are output to the output portion.
Inventors
- 👤 Azuma C/O Wacom Co. Ltd. Murakami
- 👤 Kazuo C/O Wacom Co. Ltd. Aoki
- 👤 Tusguya C/O Wacom Co. Ltd. Yamanami
- 👤 Yoshiaki C/O Wacom Co. Ltd. Tomofuji
- 👤 Takeshi C/O Wacom Co. Ltd. Tanaka
- 👤 Satoshi C/O Wacom Co. Ltd. Inashima
- 👤 Takahiko C/O Wacom Co. Ltd. Funahashi
- 👤 Toshihide C/O Wacom Co. Ltd. Chikami
- 👤 Toshiaki C/O Wacom Co. Ltd. Senda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 04:28
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/046; B; B43; B43L; B43L1/00; G06F3/033; G06F3/0354; G06F3/03545
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
152 words
An electronic blackboard apparatus comprising: a writing tool (2;3;4) or the like including a tuning circuit (22;33;46,47) which includes at least a coil (221;333,334;462, 472), and in which a predetermined frequency (f₀,f₁,f₂,f₃) is arranged to be the tuning frequeny thereof; a sensing portion (11) including electric wave generating means for generating electric wave that can synchronize with said tuning frequency and an electric wave detection means for detecting electric wave reflected by said tuning circuit; coordinate detection means (608,609) for transmitting and receiving signals between said writing tool or the like and said sensing portion for the purpose of detecting, in response to said signals, the coordinate which corresponds to the position assigned by said writing tool or the like; and image information processing means (7) for processing, on the basis of the thus-detected coordinate, image information which corresponds to images or the like formed on a writing tool or the like.
Claim 2
Dependent Claim
152 words
An electronic blackboard apparatus comprising: a writing tool (2;3;4) or the like including a tuning circuit (22;33;46,47) which includes at least a coil (221;333,334;462, 472), and in which a predetermined frequency (f₀,f₁,f₂,f₃) is arranged to be the tuning frequeny thereof; a sensing portion (11) including electric wave generating means for generating electric wave that can synchronize with said tuning frequency and an electric wave detection means for detecting electric wave reflected by said tuning circuit; coordinate detection means (608,609) for transmitting and receiving signals between said writing tool or the like and said sensing portion for the purpose of detecting, in response to said signals, the coordinate which corresponds to the position assigned by said writing tool or the like; and image information processing means (7) for processing, on the basis of the thus-detected coordinate, image information which corresponds to images or the like formed on a writing tool or the like.
Claim 3
Dependent Claim
26 words
An electronic blackboard apparatus according to claim 1, wherein said electric wave generating means and said electric wave detection means are arranged to be alternately operated.
Claim 4
Dependent Claim
44 words
An electronic blackboard apparatus according to claim 1 or 2, wherein said electric wave generating means and said electric wave detection means include x and y-direction loop coil groups (11x-1, ... 11x-48; ... 11y-1, ... 11y-30) arranged to comprise the same loop coil groups.
Claim 5
Dependent Claim
191 words
An electronic blackboard apparatus according to claim 1, 2 or 3 further comprising: a writing tool (3,4) or the like including a tuning circuit (33;46,47) whose tuning frequency is changed from any tuning frequency of a plurality of frequencies to another frequency in accordance with any of a plurality of tuning circuits each of which has an individual frequency or the state of the same; signal generating means (602) for generating AC signals having individual frequencies; signal detection means (607) for detecting AC signals having individual frequencies; writing tool identification means (601) for generating identification information (P₁,P₂) expressing, on the basis of the AC signal detected by said signal detection means from x and y-direction loop coils, the type or the state of said writing tool or the like which is being used on said sensing portion; and image information processing means for processing image information which corresponds to the image on said writing surface on the basis of the x and y-direction coordinates of said writing tool or the like and identification information expressing the type or the state of said writing tool or the like which is being used.
Claim 6
Dependent Claim
95 words
An electronic blackboard apparatus according to claim 1, 2, 3, or 4 further comprising: writing surfaces (153,154) disposed on both sides of said sensing portion and capable of being used repeatedly; means (94,95,96) for detecting the surface which is being used for detecting the writing surface which is being used from writing surfaces; and coordinate conversion means for outputting, intact or after the coordinates have been converted on the basis of the writing surface which is being used, x and y-direction coordinates of said writing tool or the like outputted from said coordinate detection means.
Claim 7
Dependent Claim
242 words
An electronic blackboard apparatus comprising: a sensing portion (11) formed by arranging an x-direction loop coil group(11x-1, ..., 11x-48) in x-direction in parallel and a y-direction loop coil group (11y-1, ..., 11y-30) in y-direction in parallel; a writing surface (14;153,154) disposed on said sensing portion and capable of being used repeatedly; a writing tool (2;3;4) ir the like including a tuning circuit (22;33;46,47) which includes at least a coil (221;332;463,473) and a capacitor (222;333,334;462,472) and in which a prede termined frequeny (f₀,f₁,f₂,F₃) is arranged to be a tuning frequency thereof; x-direction and y-direction selection means (603x,603y) for successively selecting x-direction loop coil group and y-direction loop coil group; signal generating means (602) for generating an AC signal with a predetermined frequency; signal detection means (607) for detecting an AC signal which a predetermined frequency; connection switch means (606) for alternately connecting either of said signal generating means or said signal detection means to said x and y-direction loop coils which are successively selected by said x-direction and y-direction selection means; coordinate detection means (608,609) for obtaining, on the basis of the AC signal detected by said signal detection means from said x-and y-direction loop coils, x and y-direction coordinates of said writing tool or the like positioned on said sensing portion; and image information processing means (7) for processing, on the basis of said x and y-direction coordinates, image information corresponding to the image or the like formed on said writing surface.
Claim 8
Dependent Claim
242 words
An electronic blackboard apparatus comprising: a sensing portion (11) formed by arranging an x-direction loop coil group(11x-1, ..., 11x-48) in x-direction in parallel and a y-direction loop coil group (11y-1, ..., 11y-30) in y-direction in parallel; a writing surface (14;153,154) disposed on said sensing portion and capable of being used repeatedly; a writing tool (2;3;4) ir the like including a tuning circuit (22;33;46,47) which includes at least a coil (221;332;463,473) and a capacitor (222;333,334;462,472) and in which a prede termined frequeny (f₀,f₁,f₂,F₃) is arranged to be a tuning frequency thereof; x-direction and y-direction selection means (603x,603y) for successively selecting x-direction loop coil group and y-direction loop coil group; signal generating means (602) for generating an AC signal with a predetermined frequency; signal detection means (607) for detecting an AC signal which a predetermined frequency; connection switch means (606) for alternately connecting either of said signal generating means or said signal detection means to said x and y-direction loop coils which are successively selected by said x-direction and y-direction selection means; coordinate detection means (608,609) for obtaining, on the basis of the AC signal detected by said signal detection means from said x-and y-direction loop coils, x and y-direction coordinates of said writing tool or the like positioned on said sensing portion; and image information processing means (7) for processing, on the basis of said x and y-direction coordinates, image information corresponding to the image or the like formed on said writing surface.
Claim 9
Dependent Claim
71 words
A writing tool (2;3;4) comprising a tuning circuit (22;33;46,47) which is included in a frame (21;31;41) designed to correspond to the purpose or use of said writing tool in such a manner that said tuning circuit is able to be tuned to an electric wave to be transmitted from a sensing portion (11) and said tuning circuit as well returns the energy of the thus-tuned electric wave to said sensing portion.
Claim 10
Dependent Claim
71 words
A writing tool (2;3;4) comprising a tuning circuit (22;33;46,47) which is included in a frame (21;31;41) designed to correspond to the purpose or use of said writing tool in such a manner that said tuning circuit is able to be tuned to an electric wave to be transmitted from a sensing portion (11) and said tuning circuit as well returns the energy of the thus-tuned electric wave to said sensing portion.
Claim 11
Dependent Claim
64 words
A writing tool (2,3) or the like comprising a tuning circuit (22;33) which includes at least a coil (221,332) and a capacitor (222;333,334) and in which the tuning frequency thereof is arranged to be a predetermined frequency (f₀,f₁), said tuning circuit being accommodated in a rod-like frame (21;31) such that the longitudinal direction of said rod-like frame meets the axial direction of said coil.
Claim 12
Dependent Claim
64 words
A writing tool (2,3) or the like comprising a tuning circuit (22;33) which includes at least a coil (221,332) and a capacitor (222;333,334) and in which the tuning frequency thereof is arranged to be a predetermined frequency (f₀,f₁), said tuning circuit being accommodated in a rod-like frame (21;31) such that the longitudinal direction of said rod-like frame meets the axial direction of said coil.
Claim 13
Dependent Claim
54 words
An instruction rod (2) for an electronic blackboard, comprising: a rod-like body (21) which has a predetermined length at least when used and in which the front portion thereof includes a tuning circuit (22) having the same tuning frequency which is the same as that of electric wave discharged from a sensing portion (11).
Claim 14
Dependent Claim
54 words
An instruction rod (2) for an electronic blackboard, comprising: a rod-like body (21) which has a predetermined length at least when used and in which the front portion thereof includes a tuning circuit (22) having the same tuning frequency which is the same as that of electric wave discharged from a sensing portion (11).
Claim 15
Dependent Claim
136 words
A marker (3) for an electronic blackboard comprising: a frame (31) accommodating a pen body (32) with which writing on a writing surface is enabled and a tuning circuit (33) which is consisting of at least a coil (332) including a core, and a capacitor (333,334) and which has a predetermined tuning frequency, wherein a portion of said pen body projects or is capable of projecting over the outer surface of said frame for enabling writing on said writing surface at least when used, and said tuning circuit synchronizes with energy of electric wave discharged from said turning circuit or electric wave generating means and discharges said energy to said electric wave detection means so that writing with said pen body is enabled and the position to be measured is instructed to a sensing portion (11).
Claim 16
Dependent Claim
136 words
A marker (3) for an electronic blackboard comprising: a frame (31) accommodating a pen body (32) with which writing on a writing surface is enabled and a tuning circuit (33) which is consisting of at least a coil (332) including a core, and a capacitor (333,334) and which has a predetermined tuning frequency, wherein a portion of said pen body projects or is capable of projecting over the outer surface of said frame for enabling writing on said writing surface at least when used, and said tuning circuit synchronizes with energy of electric wave discharged from said turning circuit or electric wave generating means and discharges said energy to said electric wave detection means so that writing with said pen body is enabled and the position to be measured is instructed to a sensing portion (11).
Claim 17
Dependent Claim
26 words
A marker according to claim 10,wherein said pen body comprises a felt pen capable of being used on a usual whiteboard and available on the market.
Claim 18
Dependent Claim
29 words
A marker according to claim 10 or 11, wherein said frame is so formed by at least two detachable components (31a,31b) as to enable to replace said pen body.
Claim 19
Dependent Claim
42 words
An eraser (4) for an electronic blackboard comprising an erasing member(45) arranged to have a predetermined area and a tuning circuit(46,47) whose tuning frequency (f₂,f₃) is arranged to be same as that of an electric wave discharged from a sensing member (11).
Claim 20
Dependent Claim
42 words
An eraser (4) for an electronic blackboard comprising an erasing member(45) arranged to have a predetermined area and a tuning circuit(46,47) whose tuning frequency (f₂,f₃) is arranged to be same as that of an electric wave discharged from a sensing member (11).
References Cited (Backward Citations)
No citation records indexed.
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