WO2008018757A1 - Device for generating the signals used for position tracing and the system including the same - Google Patents
Device for generating the signals used for position tracing and the system including the same Download PDFInfo
- Publication number
- WO2008018757A1 WO2008018757A1 PCT/KR2007/003820 KR2007003820W WO2008018757A1 WO 2008018757 A1 WO2008018757 A1 WO 2008018757A1 KR 2007003820 W KR2007003820 W KR 2007003820W WO 2008018757 A1 WO2008018757 A1 WO 2008018757A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ultrasonic
- wave
- tracing
- signal generating
- wave signal
- 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
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
- G06F3/033—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
-
- 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
-
- 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 input pen further includes a pen-tip filled with an ink to record actually on paper.
- the input pen may include a pen-tip which penetrates a center of the main body so as to improve only feelings in handwriting.
- the pen-tip penetrates the cylindrical ultrasonic-wave generating unit.
- An outer housing which enclosures the ultrasonic- wave generating unit and the pen-tip is coupled with the main body.
- the one direction in which the ultrasonic-wave signal is emitted is a paper surface direction.
- FIG. 3 is a view illustrating a construction of a position-tracing-signal generating apparatus according to a first embodiment of the present invention
- FIG. 4 is a cross-sectional view illustrating a guide part coupled with a main body according to the first embodiment of the invention
- FIG. 5 is a view for explaining an input method according to the first embodiment of the invention.
- FIG. 3 is a view illustrating a construction of a position-tracing-signal generating apparatus according to a first embodiment of the invention.
- the position-tracing-signal generating apparatus includes a main body 200 and a guide part 300 coupled with the main body 200.
- the main body 200 includes a power supply unit 230, an ultrasonic- wave signal generating unit 240, a reference signal generating unit 220, a controller 210, and a pen- tip 250.
- the power supply unit 230 supplies a power to the ultrasonic- wave signal generating unit 240, the reference signal generating unit 220, and the controller 210.
- the reference signal generating unit 220 supplied with the power generates the reference signal according to control signals input from the controller 210.
- an IR signal or an RF signal may be used as the reference signal.
- the guide part 300 is formed to have the space for accommodating the ultrasonic- wave signal generating unit 240.
- the guide part 300 is formed in a corn shape.
- an inserted part or a screw thread is formed at one end of the guide part 300, so that the guide part can be coupled with the main body 200 by insertion connection, screw connection, or adhesion connection.
- a ultrasonic wave emitting portion 310 is formed at the other end thereof to emit the ultrasonic- wave signal.
- the reference signal generating unit 220 When the control signals are input from the controller 210, the reference signal generating unit 220 generates the reference signal, and the ultrasonic- wave generating member 244 generates the ultrasonic wave by converting the electric energy applied by the power supply unit 230 into the vibration energy.
- the generated ultrasonic wave propagates along the guide path 340 to emit from the ultrasonic wave emitting portion 310.
Landscapes
- 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)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Position Input By Displaying (AREA)
Abstract
The present invention discloses a position-tracing-signal generating apparatus and an input system including a position-tracing input apparatus for inputting information by tracing the position of the position-tracing-signal generating apparatus. The position-tracing-signal generating apparatus is capable of inputting accurately information on the position-tracing by emitting a ultrasonic-wave signal through a guide path formed between a guide part and a ultrasonic- wave signal generating unit in only a paper surface direction irrespective of usage of the position-tracing-signal generating apparatus by user. In addition, according to the position- tracing-signal generating apparatus of the invention, a plurality of ultrasonic- wave generating members are provided in the ultrasonic- wave signal generating unit, and the ultrasonic- wave generating members sequentially generate ultrasonic- waves in a predetermined time interval calculated based on separation distances between the ultrasonic- wave generating members so that the ultrasonic- wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic-wave generating members. Accordingly, the position-tracing-signal generating apparatus can also stably transmit the ultrasonic- wave signal to an ultrasonic- wave signal receiving sensor disposed at a long distance.
Description
Description
DEVICE FOR GENERATING THE SIGNALS USED FOR POSITION TRACING AND THE SYSTEM INCLUDING THE
SAME
Technical Field
[1] The present invention relates to a position-tracing-signal generating apparatus and an input system including a position-tracing input apparatus for inputting information by tracing a position of the position-tracing-signal generating apparatus. Background Art
[2] In a position-tracing input apparatus, a user recognizes a position of a moving position-tracing-signal generating apparatus and inputs information on the position and trajectory of the signal generating device. At present, the position-tracing input apparatus together with the position-tracing-signal generating apparatus which is implemented with an input pen is embodied as a natural handwriting input system. For the convenience of description, the invention will be described mainly based on an example of the natural handwriting input system which is constructed with the position-tracing-signal generating apparatus and the position-tracing input apparatus.
[3] Unlike a natural handwriting recognition system implemented on a tablet personal computer (PC), the natural handwriting input system recognizes coordinates of the input pen by calculating a distance based on a time interval between received time points of a reference signal and a ultrasonic- wave signal (generated by the input pen) received by the natural handwriting input system. In addition, the natural handwriting input system recognizes a trajectory of the input pen by connecting moving coordinates of the input pen. The natural handwriting input system inputs the recognized coordinates and trajectory of the input pen. In the natural handwriting input system, infrared rays (IR) or radio frequency (RF) signals may be used as the reference signal.
[4] FIG. 1 is a view illustrating a construction of a conventional position-tracing-signal generating apparatus. Referring to FIG. 1, the position-tracing- signal generating apparatus is embodied in a pen type. A main body of the input pen includes a power supply unit for supplying power, a reference signal generating unit for generating a reference signal, an ultrasonic- wave signal generating unit for generating a ultrasonic- wave signal, and a controller for controlling the reference signal generating unit and the ultrasonic-wave signal generating unit.
[5] In addition, the input pen further includes a pen-tip filled with an ink to record actually on paper. Alternatively, the input pen may include a pen-tip which penetrates a center of the main body so as to improve only feelings in handwriting. The pen-tip
penetrates the cylindrical ultrasonic-wave generating unit. An outer housing which enclosures the ultrasonic- wave generating unit and the pen-tip is coupled with the main body.
[6] Furthermore, as shown in FIG. 1, the outer housing is provided with a penetrating portion formed at a circumference of the outer housing to emit the ultrasonic waves generated by the ultrasonic-wave signal generating unit.
[7] FIG. 2 is a view illustrating usage of the conventional position-tracing- signal generating apparatus. Referring to FIG. 2, a user writes down letters to be input by contacting the pen-tip on a paper or a flat surface.
[8] However, in handwriting process of user, although the pen-tip of the input pen is positioned at the same spot, the position of the ultrasonic- wave signal generating unit may be moved to a position Pl, a position P2, and a position p3 according to the direction and slope of the input pen with respect to a paper surface.
[9] In this case, as shown in FIG. 2, although the distance from the pen-tip of the input pen to the ultrasonic wave receiving unit is the same, the position-tracing input apparatus recognizes different distances of the input pen according to the direction and slope of the input pen. More specifically, when the input pen is positioned at position Pl, P2, or P3, the distance of the input pen recognized by the position-tracing input apparatus is Ll, L2, or L3, respectively. These distance errors cause an inaccurate input value.
[10] Particularly, when the user rapidly changes the sloped direction of the input pen during handwriting, the distance between the ultrasonic- wave generating unit and the position-tracing input apparatus is rapidly changed. Therefore, the position of the input pen recognized by the position-tracing input apparatus is also rapidly changed. Accordingly, there is a problem in that the inaccurate input value is generated irrespective of user's intent. Disclosure of Invention Technical Problem
[11] An aspect of the present invention provides a position-tracing-signal generating apparatus capable of accurately inputting information on the position-tracing irrespective of usage of the position-tracing-signal generating apparatus by user and a position-tracing input system using the same. Technical Solution
[12] According to a first aspect of the present invention, there is provided a position- tracing- signal generating apparatus comprising: a main body provided with an ultrasonic- wave signal generating unit for generating a ultrasonic- wave signal; and a guide part coupled with the main body and accommodating the ultrasonic-wave signal
generating unit so that the ultrasonic-wave signal generated by the ultrasonic-wave signal generating unit are emitted in one direction.
[13] The ultrasonic- wave signal generating unit may include a plurality of ultrasonic- wave generating members for generating ultrasonic waves, and the plurality of ultrasonic- wave generating members may generate the ultrasonic waves so that the ultrasonic- wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic-wave generating members.
[14] The plurality of ultrasonic- wave generating members may be disposed to be separated from each other by a predetermined distance, and the ultrasonic- wave generating members may sequentially generate the ultrasonic waves in a predetermined time interval so that the ultrasonic- wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic- wave generating members.
[15] The one direction in which the ultrasonic-wave signal is emitted is a paper surface direction.
[16] It is preferable that the guide part includes an ultrasonic wave emitting portion for emitting the ultrasonic-wave signal in the one direction, and the ultrasonic-wave signal generated by the ultrasonic- wave signal generating unit propagates along a guide path formed between an inner surface of the guide part and the ultrasonic- wave signal generating unit accommodated in the guide part to emit from the ultrasonic wave emitting portion.
Advantageous Effects
[17] As described above, a position-tracing-signal generating apparatus according to the invention can accurately input information on the position-tracing by emitting a ultrasonic- wave signal through a guide path formed between a guide part and an ultrasonic- wave signal generating unit in only a paper surface direction irrespective of usage of the position-tracing-signal generating apparatus by user.
[18] In addition, according to the position-tracing- signal generating apparatus of the invention, a plurality of ultrasonic- wave generating members are provided in the ultrasonic- wave signal generating unit, and each ultrasonic-wave generating member sequentially generates in a predetermined time interval calculated according to a separation distance between the ultrasonic- wave generating members so that the ultrasonic- wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic-wave generating members. Accordingly, the position- tracing- signal generating apparatus of the invention can also stably transmit the ultrasonic- wave signal to an ultrasonic- wave signal receiving sensor disposed at a long distance. Brief Description of the Drawings
[19] FIG. 1 is a view illustrating of a construction of a conventional position- tracing- signal generating apparatus;
[20] FIG. 2 is a view illustrating usage of the conventional position-tracing- signal generating apparatus of FIG. 1 ;
[21] FIG. 3 is a view illustrating a construction of a position-tracing-signal generating apparatus according to a first embodiment of the present invention;
[22] FIG. 4 is a cross-sectional view illustrating a guide part coupled with a main body according to the first embodiment of the invention;
[23] FIG. 5 is a view for explaining an input method according to the first embodiment of the invention;
[24] FIG. 6 is a view for explaining a construction and operations of a position- tracing- signal input apparatus according to a second embodiment of the invention;
[25] FIG. 7 is a view for explaining an error of a position-tracing according to the first and second embodiments of the invention as compared with a conventional position- tracing- signal generating apparatus; and
[26] FIG. 8 is a view for explaining a construction and operations of a position- tracing- signal generating apparatus according to a third embodiment of the invention. Best Mode for Carrying Out the Invention
[27] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
[28] FIG. 3 is a view illustrating a construction of a position-tracing-signal generating apparatus according to a first embodiment of the invention. Referring to FIG. 3, the position-tracing-signal generating apparatus includes a main body 200 and a guide part 300 coupled with the main body 200.
[29] The main body 200 includes a power supply unit 230, an ultrasonic- wave signal generating unit 240, a reference signal generating unit 220, a controller 210, and a pen- tip 250. The power supply unit 230 supplies a power to the ultrasonic- wave signal generating unit 240, the reference signal generating unit 220, and the controller 210. The reference signal generating unit 220 supplied with the power generates the reference signal according to control signals input from the controller 210. In the invention, an IR signal or an RF signal may be used as the reference signal.
[30] The controller 210 outputs the control signals to the ultrasonic- wave signal generating unit 240 and the reference signal generating unit 220 in a predetermined time interval so that the ultrasonic- wave signal generating unit 240 and the reference signal generating unit 220 generate the ultrasonic- wave signal and the reference signal, respectively.
[31] The pen-tip 250 may be formed at a distal end of the ultrasonic- wave signal
generating unit 240 so as to provide only feelings in handwriting of a general pen. Alternatively, so as to provide actual handwriting, the pen-tip 250 filled with an ink may be inserted into the main body 200 through the ultrasonic-wave signal generating unit 240.
[32] Meanwhile, the ultrasonic-wave signal generating unit 240 includes a pen-core 242, an ultrasonic- wave generating member 244, an ultrasonic wave blocking member 246, and a supporting member 248 to generate the ultrasonic-wave signal according to the control signals input from the controller 210.
[33] A cylindrical space is formed at the center of the pen-core 242 in the ultrasonic- wave signal generating unit 240 so as to accommodate the pen-tip 250. The ultrasonic wave blocking member 246 is formed to protrude by a predetermined height from a circumference of the pen-core 242. Therefore, since the ultrasonic wave blocking member 246 is closely adhered to an inner surface of the guide part 300 described later, the ultrasonic- wave signal are emitted in only one direction.
[34] The ultrasonic waves generating unit 244 if formed to surround the pen-core 242.
Alternatively, the ultrasonic- wave generating member 244 is disposed in a predetermined region of the circumference of the pen-core 242. The ultrasonic waves generating unit 244 generates the ultrasonic waves by converting electric energy applied by the power supply unit 230 into vibration energy according to the control signals. Preferably, the ultrasonic- wave generating member 244 is constructed with piezoelectric element such as piezo-film.
[35] The supporting member 248 is closely adhered to the inner surface of the guide part
300 to have a function of fixing the position of the ultrasonic- wave signal generating unit 240 within the guide part 300.
[36] As shown in FIG. 3, when the user writes down with the input pen, it is preferable that the ultrasonic- wave signal generating unit 240 is positioned close to the paper surface (for example, at a lower end of the input pen). The position of the controller 210, the reference signal generating unit 220, and the power supply unit 230 may be arbitrarily disposed in the main body 220.
[37] Meanwhile, the guide part 300 is coupled with the main body 200 to enclose the ultrasonic- wave signal generating unit 240 so that the ultrasonic- wave signal generated by the ultrasonic- wave signal generating unit 240 is emitted in the direction (hereinafter, referred to as a paper surface direction) in which the pen-tip 250 is in contact with the paper or flat surface.
[38] The guide part 300 is formed to have the space for accommodating the ultrasonic- wave signal generating unit 240. Generally, the guide part 300 is formed in a corn shape. In addition, an inserted part or a screw thread is formed at one end of the guide part 300, so that the guide part can be coupled with the main body 200 by insertion
connection, screw connection, or adhesion connection. IN addition, a ultrasonic wave emitting portion 310 is formed at the other end thereof to emit the ultrasonic- wave signal.
[39] FIG. 4 is a cross-sectional view illustrating the guide part 300 coupled with the main body 200 according to the first embodiment of the invention. Referring to FIG. 4, when the ultrasonic- wave signal generating unit 240 is inserted into the guide part 300, the pen-tip 250 is protruded outward through the ultrasonic wave emitting portion 310. At this time, the ultrasonic wave blocking member 246 of the ultrasonic- wave signal generating unit 240 is in contact with the inner surface of the guide part 300, so that it is possible to block the ultrasonic waves generated by the ultrasonic-wave generating member 244 from emitting in the direction opposite to the paper surface direction.
[40] In addition, in the stat that the ultrasonic- wave signal generating unit 240 inserted into the guide part 300, a predetermined space (hereinafter, referred to as a guide path 340) is formed between the pen-core 242 of the ultrasonic- wave signal generating unit 240 and the inner surface of the guide part 300. The ultrasonic wave generated by the ultrasonic- wave generating member 244b propagates along the guide path 340 to emit from the ultrasonic wave emitting portion 310.
[41] FIG. 5 is a view for explaining an input method according to the first embodiment of the invention.
[42] Now, operations of the input system according to the first embodiment of the invention will be described with reference to FIG. 5. An input pen 400 is constructed by coupling the guide part 300 with the main body 200. The controller 210 of the input pen 400 generates the control signals that instruct the ultrasonic- wave signal generating unit 240 and the reference signal generating unit 220 to generate the reference signal and the ultrasonic- wave signal in a predetermined time interval and outputs the control signals to the ultrasonic- wave signal generating unit 240 and the reference signal generating unit 220.
[43] When the control signals are input from the controller 210, the reference signal generating unit 220 generates the reference signal, and the ultrasonic- wave generating member 244 generates the ultrasonic wave by converting the electric energy applied by the power supply unit 230 into the vibration energy. The generated ultrasonic wave propagates along the guide path 340 to emit from the ultrasonic wave emitting portion 310.
[44] A position-tracing input apparatus 450 includes a reference signal receiving sensor
40 for receiving the reference signal and a plurality of ultrasonic- wave signal receiving sensors 30a and 30b for receiving the ultrasonic- wave signal. At this time, the ultrasonic- wave signal receiving sensors 30a and 30b are disposed to be separated from each other by a predetermined distance.
[45] The coordinates (x, y) of the input pen 400 can be obtained by solving the following
Equation 1 with respect to x and y.
[46] [Equation 1]
[47] a2=x2+y2
[48] b2=(c-x)2+y2
[49] In Equation 1, since the IR or RF signal is used as the reference signal propagates at the speed of light, it can be considered that, at the same time of generating the IR or RF signal in the input pen 400, the IR or RF signal is to be received by the reference signal receiving sensor 40. For this reason, the distances a and b can be obtained by multiplying the time interval between the received time points of the reference signal and the ultrasonic- wave signal received by the left-side and right-side ultrasonic- wave signal receiving sensors 30a and 30b at the speed of sound. Since the distance c is a predetermined value, the coordinates (x, y) can be obtained by applying values of the distances a, b, and c to Equation 1. Therefore, user's handwriting contents such as letters can be input based on the moved coordinates of the input pent 400.
[50] However, according to the first embodiment of the invention, when the ultrasonic- wave signal generated by the ultrasonic- wave signal generating unit 240 enters the inner surface of the guide part 300 constituting the guide path 340, an intensity of the ultrasonic wave signal is attenuated. Therefore, the intensity of the ultrasonic- wave signal to emit from the ultrasonic wave emitting portion is also greatly attenuated as compared with the ultrasonic- wave signal initially generated by the ultrasonic-wave signal generating unit 240. Accordingly, when the distances between the input pen 400 and the ultrasonic- wave signal receiving sensors 30a and 30b is far in some user's environment, the following problems may occur. That is, the ultrasonic wave receiving sensors 30a and 30b cannot accurately receive the attenuated ultrasonic- wave signal, so that the position of the input pen 400 cannot be accurately traced.
[51] The second embodiment of the invention provides an improved position- tracing- signal generating apparatus as compared with the first embodiment of the invention. The position-tracing-signal input apparatus according to the second embodiment of the invention has the same construction as that of the first embodiment of the invention except for the ultrasonic- wave signal generating unit 240. Therefore, a construction of only the ultrasonic-wave signal generating unit will be described.
[52] FIG. 6 is a view for explaining the construction and operations of the position- tracing- signal input apparatus according to the second embodiment of the invention. According to the second embodiment, the ultrasonic-wave signal generating unit 240 includes a plurality of ultrasonic-wave generating members 244-2a and 244-2b instead of the single ultrasonic-wave generating member 244. Referring to FIG. 6, in the ultrasonic- wave signal generating unit 240, centers of the two ultrasonic-wave
generating members 244-2a and 244-2b are separated from each other by a predetermined distance L4.
[53] When the control signals are input to the ultrasonic-wave signal generating unit 240 from the controller 210, the first ultrasonic-wave generating member 244-2a that is positioned at the farthest distance from the ultrasonic wave emitting portion 310 generates the ultrasonic wave. More specifically, as indicated by reference numeral 501, the ultrasonic wave (a) generated by the first ultrasonic- wave generating member 244-2a propagates toward the ultrasonic wave emitting portion 310. When the ultrasonic wave (a) propagates by a predetermined distance L4 as indicated by reference numeral 502, the ultrasonic wave (b) is generated by the second ultrasonic- wave generating member 244-2b that is positioned at the nearest distance from the ultrasonic wave emitting portion 310 as indicated by reference numeral 503.
[54] At this time, the ultrasonic wave (a) of reference numeral 502 and the ultrasonic wave (b) of reference numeral 503 are superposed to each other, so that an amplified ultrasonic- wave signal (a + b) can be generated as indicated by reference numeral 504. The amplified ultrasonic- wave signal is emitted through the ultrasonic wave emitting portion 310 and received by the ultrasonic- wave signal receiving sensor.
[55] Although two ultrasonic- wave generating members 244-2a and 244-2b are shown in
FIG. 6, three or more ultrasonic- wave generating members may be disposed to be separated from each other by a predetermined distance. In addition, the amplified ultrasonic- wave signal may be generated by generating sequentially the ultrasonic waves in a predetermined time interval according to the separation distance.
[56] FIG. 7 is a view for explaining an error of position-tracing the position- tracing- signal generating apparatuses according to the first and second embodiments of the invention as compared with a conventional position-tracing- signal generating apparatus. Referring to FIG. 7, the distance error calculated based on the center of the conventional ultrasonic-wave generating member shown in FIG. 2 is about L6. However, in case of the position-tracing-signal generating apparatus according to the invention, since the ultrasonic-wave signal are emitted through only the ultrasonic wave emitting portion 310 close to the paper surface, the distance error is about L7 according to the direction and slope of the input pen with respect to the same position of the paper surface which the pen-tip 250 is in contact with. As can be seen intu- itionally, the distance error L7 according to the invention is remarkably reduced as compared with the conventional distance error L6.
[57] FIG. 8 is a view for explaining a construction and operations of a position- tracing- signal generating apparatus according to a third embodiment of the invention.
[58] The position-tracing-signal generating apparatus according to the third embodiment has the same construction as those of the first and second embodiments except that the
controller 210 and the reference signal generating unit 220 are omitted from the position-tracing-signal generating apparatus 400.
[59] Except that the controller 210 and the reference signal generating unit 220 are not included, the construction of the position-tracing- signal generating apparatus according to the third embodiment of the invention is the same as those of the first and second embodiments in that the power supply unit 230, the ultrasonic-wave signal generating unit 240, and the pen-tip 250 are included in the main body 200, and the guide part 300 for accommodating the ultrasonic- wave signal generating unit 240 is coupled with the main body 200. However, the construction of the position-tracing-signal generating apparatus according to the third embodiment is different from those of the first and second embodiments in that the control signal used for the ultrasonic- wave signal generating unit 240 generating the ultrasonic waves is input from the position-tracing input apparatus 450 through a cable. Therefore, only the construction and the operations different from those in the first and second embodiments of the invention will be described.
[60] Referring to FIG. 8, the position-tracing- signal generating apparatus 400 according to the third embodiment of the invention is coupled with the position-tracing input apparatus 450 through the cable. The position-tracing input apparatus 450 generates control signals that instructs the position-tracing- signal generating apparatus 400 (hereinafter, referred to as an input pen) to generate the ultrasonic- wave signal in a predetermined time interval and outputs the control signals to the input pen 400.
[61] The input pen 400 receiving the input control signals generates the ultrasonic- wave signal and emits the ultrasonic-wave signal through the ultrasonic wave emitting portion 310. The ultrasonic- wave signal is received by the plurality of ultrasonic- wave signal receiving sensors disposed in the position-tracing input apparatus 450.
[62] The position-tracing input apparatus 450 sets the time that the control signals instructing to generate the ultrasonic- wave signal is output to the input pen 400 to the reference time. The position-tracing input apparatus 450 can measure the position of the input pen 400 in the same manner as the first and second embodiments by using time intervals from the reference time to the received time points of the ultrasonic- wave signal received by the plurality of ultrasonic- wave signal receiving sensors.
[63] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The exemplary embodiments should be considered in descriptive sense only and not for purpose off limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences
within the scope will be construed as being included in the present invention.
Claims
[1] A position-tracing-signal generating apparatus, comprising: a main body provided with an ultrasonic-wave signal generating unit for generating a ultrasonic- wave signal; and a guide part coupled with the main body and accommodating the ultrasonic- wave signal generating unit so that the ultrasonic- wave signal generated by the ultrasonic- wave signal generating unit are emitted in one direction.
[2] The position-tracing-signal generating apparatus according to claim 1, wherein the ultrasonic- wave signal generating unit includes a plurality of ultrasonic- wave generating members for generating ultrasonic waves, and wherein the plurality of ultrasonic- wave generating members generate the ultrasonic waves so that the ultrasonic-wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic- wave generating members.
[3] The position-tracing-signal generating apparatus according to claim 2, wherein the plurality of ultrasonic- wave generating members are disposed to be separated from each other by a predetermined distance, and wherein the plurality of ultrasonic- wave generating members sequentially generate the ultrasonic waves in a predetermined time interval so that the ultrasonic- wave signal can be amplified through superposition of the ultrasonic waves generated by the ultrasonic- wave generating members.
[4] The position-tracing-signal generating apparatus according to claim 1, wherein the one direction in which the ultrasonic- wave signal are emitted is a paper surface direction.
[5] The position-tracing-signal generating apparatus according to claim 1, wherein the guide part includes an ultrasonic wave emitting portion for emitting the ultrasonic-wave signal in the one direction, and wherein the ultrasonic- wave signal generated by the ultrasonic-wave signal generating unit propagates along a guide path formed between an inner surface of the guide part and the ultrasonic- wave signal generating unit accommodated in the guide part to emit from the ultrasonic wave emitting portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0075745 | 2006-08-10 | ||
| KR1020060075745A KR20080014273A (en) | 2006-08-10 | 2006-08-10 | Signal generator for position tracking and input system including the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008018757A1 true WO2008018757A1 (en) | 2008-02-14 |
Family
ID=39033239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2007/003820 Ceased WO2008018757A1 (en) | 2006-08-10 | 2007-08-08 | Device for generating the signals used for position tracing and the system including the same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20080014273A (en) |
| CN (1) | CN101405686A (en) |
| WO (1) | WO2008018757A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100281984A1 (en) * | 2008-01-15 | 2010-11-11 | Pnf Co., Ltd. | Method and apparatus for measuring position of the object using microphone |
| CN104115089A (en) * | 2012-02-17 | 2014-10-22 | Pnf有限公司 | Keyboard enabling inputting of position information and keyboard system comprising same |
| EP3246795A1 (en) | 2008-01-03 | 2017-11-22 | QUALCOMM Incorporated | Ultrasonic digitizer and host |
| EP3460642A4 (en) * | 2016-05-18 | 2020-01-08 | General Touch Co., Ltd | Writing system and writing method based on ultrasonic pen |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101128392B1 (en) * | 2011-02-15 | 2012-03-27 | (주)펜앤프리 | Apparatus and method for inputting information |
| US9201522B2 (en) * | 2013-09-03 | 2015-12-01 | Qualcomm Incorporated | Acoustic position tracking system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308936A (en) * | 1992-08-26 | 1994-05-03 | Mark S. Knighton | Ultrasonic pen-type data input device |
| JPH09167046A (en) * | 1995-12-18 | 1997-06-24 | Fuji Xerox Co Ltd | Ultrasonic stylus pen |
| US20040169439A1 (en) * | 2002-07-22 | 2004-09-02 | Minoru Toda | Handheld device having ultrasonic transducer for axial transmission of acoustic signals |
| KR20050047314A (en) * | 2003-11-17 | 2005-05-20 | 한국흑판교재주식회사 | Method for recognizing a pen-mouse of an electronic blackboard and system |
-
2006
- 2006-08-10 KR KR1020060075745A patent/KR20080014273A/en not_active Ceased
-
2007
- 2007-08-08 WO PCT/KR2007/003820 patent/WO2008018757A1/en not_active Ceased
- 2007-08-08 CN CNA2007800096197A patent/CN101405686A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308936A (en) * | 1992-08-26 | 1994-05-03 | Mark S. Knighton | Ultrasonic pen-type data input device |
| JPH09167046A (en) * | 1995-12-18 | 1997-06-24 | Fuji Xerox Co Ltd | Ultrasonic stylus pen |
| US20040169439A1 (en) * | 2002-07-22 | 2004-09-02 | Minoru Toda | Handheld device having ultrasonic transducer for axial transmission of acoustic signals |
| KR20050047314A (en) * | 2003-11-17 | 2005-05-20 | 한국흑판교재주식회사 | Method for recognizing a pen-mouse of an electronic blackboard and system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3246795A1 (en) | 2008-01-03 | 2017-11-22 | QUALCOMM Incorporated | Ultrasonic digitizer and host |
| US20100281984A1 (en) * | 2008-01-15 | 2010-11-11 | Pnf Co., Ltd. | Method and apparatus for measuring position of the object using microphone |
| US8400877B2 (en) * | 2008-01-15 | 2013-03-19 | Pnf Co., Ltd. | Method and apparatus for measuring position of the object using microphone |
| CN104115089A (en) * | 2012-02-17 | 2014-10-22 | Pnf有限公司 | Keyboard enabling inputting of position information and keyboard system comprising same |
| EP2816447A4 (en) * | 2012-02-17 | 2016-02-24 | Pnf Co Ltd | Keyboard enabling inputting of position information and keyboard system comprising same |
| EP3460642A4 (en) * | 2016-05-18 | 2020-01-08 | General Touch Co., Ltd | Writing system and writing method based on ultrasonic pen |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080014273A (en) | 2008-02-14 |
| CN101405686A (en) | 2009-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4006290B2 (en) | Coordinate input device, control method of coordinate input device, and program | |
| JP5411359B2 (en) | Signal generator | |
| JP4590114B2 (en) | Coordinate input device, control method therefor, and recording medium | |
| WO2008018757A1 (en) | Device for generating the signals used for position tracing and the system including the same | |
| KR101309778B1 (en) | Method and system for digital pen assembly | |
| US9864441B2 (en) | Object orientation detection with a digitizer | |
| CN103354920B (en) | Information input device and method for performing automatic switching between information input mode using touch screen and information input mode using ultrasonic signal | |
| US6628271B1 (en) | Touch panel device | |
| CN105677065A (en) | Remote touch device and method for display screen | |
| KR100850792B1 (en) | Device for generating the signals used for position tracing and the system including the same | |
| US7643016B2 (en) | Coordinate input pen and coordinate input apparatus having the same | |
| KR100980691B1 (en) | Multifunction Ultrasonic Input Signal Generator | |
| US20090009490A1 (en) | Ultrasonic input device for information display | |
| KR102818942B1 (en) | Display apparatus with a frequency variable fingerprint sensor | |
| JP4750817B2 (en) | Position tracking signal generator and input system including the same | |
| KR102838407B1 (en) | Display apparatus with a fingerprint sensor and temperature sensor | |
| US20090257315A1 (en) | Position tracing signal generator unit and input system having the same | |
| JP2004185488A (en) | Coordinate input device | |
| JP2004070887A (en) | Coordinate input device | |
| JP4552345B2 (en) | Digitizer and electronic blackboard equipped with it | |
| US9007874B2 (en) | Signal generation device | |
| US12443292B2 (en) | Input detection apparatus and related input device | |
| CN112689815A (en) | Stylus and input device | |
| JP2004192033A (en) | Coordinate input device | |
| JP2003216335A (en) | Coordinate input device and method for controlling the same and its program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07793427 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 200780009619.7 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| NENP | Non-entry into the national phase |
Ref country code: RU |
|
| 32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS EPO FORM 1205A DATED 18.06.2009. |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 07793427 Country of ref document: EP Kind code of ref document: A1 |