JP2009217442A - Information input display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information input display device for precisely reproducing handwriting input information. <P>SOLUTION: The information input display device for displaying an image based on the information input through handwriting on a screen includes: a plurality of area-input-type coordinate detection units detecting coordinates of positions on the screen arranged in a two-dimensional way and pressed down through handwriting input; and a coordinate determination unit determining the validity of the coordinates detected by the detection unit. When the plurality of coordinate detection units respectively detect coordinates at once, the determination unit determines the validity of each coordinate on the basis of the position relation and the displacement aspect of the detected each coordinate or any one of them, and determines, as detection invalid areas, the detection areas by the coordinate detection units which have detected the coordinates of which the validity is denied. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information input display device, and more particularly to an information input display device capable of handwriting input.

  In recent years, characters such as letters and illustrations can be input by hand using a coordinate input device such as a touch pen on a GUI screen, a character screen, or a blank screen, such as a tablet PC or PDA (Personal Digital Assistant). Various portable display terminals have been studied.

  However, such a portable display terminal emphasizes the accuracy in the touch input mode in which the function displayed on the operation button is executed by pressing the operation button displayed on the GUI screen with a touch pen or a finger. Things are mainstream, and the accuracy in the handwriting input mode in which figures such as characters and illustrations are input by handwriting on a character screen or a blank screen is not sufficient.

  Specifically, this will be described with reference to FIG. FIG. 10A is a diagram showing a configuration of a touch panel for detecting touch input and handwriting input in a conventional portable display terminal, and FIG. 10B is a schematic diagram showing a state of handwriting input in a conventional portable display terminal. is there.

  As shown in FIGS. 10 (a) and 10 (b), the conventional portable display terminal has an area input having an input area having substantially the same shape as the screen on the screen of the display unit 301 such as an LCD or an organic EL. One type touch panel 304 is arranged. The touch panel 304 outputs an analog voltage corresponding to the position on the screen pressed by touch input or handwriting input to the touch panel controller 305. The touch panel controller 305 converts the analog voltage output from the touch panel 304 into a digital signal, and detects the XY coordinates of the pressed position on the screen.

  In the portable display terminal having such a configuration, as shown in FIG. 10B, when performing touch input or handwriting input using the touch pen 5, the hand H may touch the touch panel 304 together with the pen tip 5 a of the touch pen 5. is there. For this reason, the touch panel 5 outputs an analog voltage corresponding to the intermediate position between the pen tip 5a and the hand H, and the touch panel controller 305 detects an incorrect coordinate instead of the originally desired coordinate of the pen tip 5a. As a result, there is a problem in that the trajectory K2 of the intermediate position between the pen tip 5a and the hand H is displayed on the screen of the display unit 304 instead of the trajectory K1 of the pen tip 5a to be input.

Therefore, various methods have been studied to deal with such problems. For example, there is a known method for preventing erroneous detection by setting an input invalid area having a certain width around the frame of a touch panel that is likely to be touched carelessly (see Patent Document 1).
JP 2000-39964 A

  However, the method disclosed in Patent Document 1 is sufficient to prevent erroneous detection because the invalid input area is fixed to the peripheral part of the touch panel, that is, the width of about 2 mm from the frame holding the touch panel. There is a problem that is not. For example, when inputting from the center of the screen to the upper region, the hand may hit the center from the bottom of the screen. In such a case, since the invalid input area is provided at the periphery of the screen, there is a problem that information input by hand is not invalidated and erroneous determination occurs.

  The present invention has been made in view of the above problems, and an object thereof is to provide an information input display device capable of accurately reproducing handwritten input information.

  The above object is achieved by the invention described in any one of 1 to 7 below.

1. In an information input display device capable of displaying an image based on information handwritten on the screen,
A plurality of area input type coordinate detection units that detect coordinates of a position on a screen that is arranged two-dimensionally and pressed by handwriting input;
A coordinate determination unit for determining the validity of the coordinates detected by the coordinate detection unit,
When coordinates are detected at a time by a plurality of the coordinate detection units,
The coordinate discriminating unit discriminates the validity of each coordinate based on the positional relationship and / or displacement mode of each detected coordinate, and the coordinate detecting unit detects the coordinate discriminated as invalid. An information input display device characterized in that a detection area is a detection invalid area.

2. When coordinates are detected at a time by a plurality of the coordinate detection units,
2. The information input according to claim 1, wherein the coordinate determination unit determines that a coordinate closest to the upper end of the screen among the detected coordinates is valid, and determines that the other coordinates are invalid. Display device.

3. When coordinates are detected at a time by a plurality of the coordinate detection units,
The information according to item 1 or 2, wherein the coordinate determination unit determines that the coordinates detected by the adjacent coordinate detection unit among the plurality of coordinate detection units that have detected the respective coordinates are invalid. Input display device.

4). When coordinates are detected at a time by a plurality of the coordinate detection units,
The coordinate discriminating unit discriminates that the coordinate having the largest displacement amount between the previously detected coordinate and the currently detected coordinate among the detected coordinates is valid, and discriminates other coordinates as invalid. 4. The information input display device according to any one of items 1 to 3, characterized by:

5. The coordinate determination unit
The detection area of the coordinate detection unit that has detected the coordinates determined to be valid is a detection effective area,
5. The information input display according to any one of 1 to 4, wherein the detection effective area is moved based on a displacement direction of the currently detected coordinate with respect to the previously detected coordinate of the coordinate determined to be valid. apparatus.

6). The coordinate determination unit
The detection area of the coordinate detection unit that has detected the coordinates determined to be valid is a detection effective area,
5. The information input display according to any one of 1 to 4, wherein the detection effective area is moved based on a displacement direction of the coordinate detected this time with respect to a previously detected coordinate determined to be invalid. apparatus.

7). The coordinate determination unit controls driving of the plurality of coordinate detection units,
7. The information input display device according to 5 or 6, wherein driving of a coordinate detection unit other than the coordinate detection unit as the effective detection area is stopped.

  According to the present invention, a plurality of area input type coordinate detection units that detect the coordinates of the position on the screen pressed by handwriting input are arranged in two dimensions instead of one. When coordinates are detected at a time by a plurality of coordinate detection units, the coordinate determination unit determines the validity of each coordinate based on the positional relationship and / or displacement mode of each detected coordinate. The detection area of the coordinate detection unit that detects the coordinates determined to be invalid is set as the detection invalid area. Therefore, for example, when performing touch input or handwriting input using a touch pen, if the hand hits a plurality of coordinate detection units together with the pen tip of the touch pen, each coordinate detection unit can detect the coordinates. Then, based on the positional relationship and displacement mode of each detected coordinate, it is possible to determine which coordinate is the coordinate of the pen tip that is originally desired to be detected. As a result, it is possible to prevent erroneous detection due to hand input, and to reproduce original handwritten input information with high accuracy.

  Embodiments of an information input display device according to the present invention will be described below with reference to the drawings. In addition, although this invention is demonstrated based on embodiment of illustration, this invention is not limited to this embodiment.

  First, the external appearance of the information input display device 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a front view showing an appearance of an information input display device 1 according to an embodiment of the present invention.

  As shown in FIG. 1, the information input display device 1 includes an information input display device body 3, a touch pen 5, and the like.

  As shown in FIG. 1, on the front surface of the information input display device main body 3, a display unit 301 including a display medium such as an LCD, an organic EL, or a so-called electronic paper having a memory property, and the like. A touch panel 304, a power switch 318, a cross key 319 for performing various operations and settings, and the like are provided.

  The information input display device main body 3 uses the touch pen 5 and information based on document information stored in a memory card (not shown), image information received from an external server, an information terminal, or the like via a communication network. This is a portable information terminal that displays an image or the like based on information input by handwriting on the screen of the display unit 301 of the input display device body 3.

  Next, the configuration of the main part of the information input display device body 3 will be described with reference to FIG. FIG. 2 is a block diagram showing a schematic configuration of the information input display device body 3.

  As shown in FIG. 2, the information input display device main body 3 includes a display unit 301, a display control unit 302, a VRAM 303, a touch panel 304, a touch panel controller 305, a CPU 311, a FlashROM 312, an SDRAM 313, a communication unit 314, an external I / F 315, and an operation unit. 317, a battery 321 and the like.

  The display unit 301 includes an LCD, an organic EL, or a display medium called a so-called electronic paper having a memory property. The display unit 301 is an information input display device using the touch pen 5 and an image based on document information stored in a memory card (not shown), document information received from an external server, an information terminal, or the like via a communication network. An image or the like based on information input by handwriting is displayed on the screen of the display unit 301 of the main body 3.

  The display control unit 302 controls display operations performed on the display unit 301.

  A VRAM (Video RAM) 303 is a buffer memory for image data having an image data recording capacity corresponding to the number of pixels of the display unit 301 and constituting an image reproduced and displayed on the display unit 301.

  As shown in FIGS. 3A and 3B, the touch panel 304 displays the coordinates of the position on the screen of the display unit 301 pressed by handwriting input using the touch pen 5 on the front surface of the display unit 301. A plurality of area input type touch sensors S to be detected are arranged in two dimensions. The touch panel 304 outputs an analog voltage corresponding to a position on the screen pressed by handwriting input using the touch pen 5 or GUI menu selection input to the touch panel controller 305. As a configuration of the touch panel 304, for example, a resistance film method in which a transparent resistor is attached to the screen of the display unit 301 can be used. The touch sensor S corresponds to the coordinate detection unit in the present invention.

  In this manner, by arranging the touch panel 304 in which a plurality of area input type touch sensors S are two-dimensionally arranged on the front surface of the display unit 301, as shown in FIG. When performing input or handwriting input, if the hand H hits the plurality of touch sensors S together with the pen tip 5a of the touch pen 5, the coordinates can be detected by the respective touch sensors S. As a result, the touch panel controller 305, which will be described later, can determine which coordinate is the coordinate of the nib 5a that is originally desired to be detected based on the positional relationship and displacement mode of each detected coordinate. FIG. 3B shows a state in which an image based on the locus K1 of the coordinates of the pen tip 5a determined in this way is displayed on the display unit 301.

  Returning to FIG. 2, the touch panel controller 305 controls a coordinate detection operation performed by the touch sensor S. The touch panel controller 305 applies a voltage in the X direction and Y direction of the touch sensor S at a predetermined sampling cycle (coordinate detection cycle), and thereby the analog corresponding to the pressed position on the screen output from the touch sensor S. The voltage is converted into a digital signal and converted into XY coordinates. Further, the touch panel controller 305 can monitor the presence or absence of input from the touch panel 304 even in a sleep state in which the information display input device body 3 consumes little power.

  In addition, the touch panel controller 305 corresponds to a coordinate determination unit in the present invention, and when coordinates are detected at a time by a plurality of touch sensors S, based on the positional relationship or displacement mode of each detected coordinate, The validity of each coordinate is determined, and the detection area of the touch sensor S that has detected the coordinates determined to be invalid is set as a detection invalid area. Further, the driving of the touch sensor S that detects the coordinates determined to be invalid can be stopped. Details of the coordinate determination operation performed by the touch panel controller 305 will be described later.

  A CPU (Central Processing Unit) 311 receives signals from the touch panel controller 305 and the operation unit 317, and performs display operations and image signal processing, and transmission / reception of information to / from an external server, an information terminal (not shown), and the like. Control the overall operation. In addition, the CPU 311 uses the touch pen 5 to write by hand on the screen of the display unit 21 using image information based on document information stored in a memory card (not shown), document information received from an external server, an information terminal, or the like. Image data or the like based on the information is generated and output to the display unit 301 via the display control unit 302.

  A flash ROM (Flash Read Only Memory) 312 stores various control programs executed by the CPU 311.

  An SDRAM (Synchronous Dynamic Random Access Memory) 313 temporarily stores work data such as arithmetic processing and control processing.

  The communication unit 314 transmits and receives information wirelessly to and from an external server, information terminal, etc. (not shown). As the wireless communication means of the communication unit 314, Bluetooth, wireless USB, or a low power consumption type device using infrared rays or the like is preferable.

  The external I / F 315 is an interface with an external memory such as an SD memory card, for example.

  The operation unit 317 is a switch group including a power switch 318 and a cross key 319 for performing various operations and settings.

  The battery 321 is a power source for driving the information input display device body 3.

  In FIG. 2, an arrow indicated by a broken line indicates a control path caused by the touch panel 304 via the touch panel controller 305 or the operation unit 317 when the CPU 311 is in the sleep state.

  Here, a coordinate validity determination method will be described with reference to FIGS.

(Determination method 1)
FIG. 4 is a schematic diagram illustrating an example of a coordinate validity determination method, and FIG. 7 is a flowchart illustrating a flow according to an example of a coordinate validity determination method. In the determination method 1, when coordinates are detected at a time by a plurality of touch sensors S, the validity of each coordinate is determined based on the positional relationship of the detected coordinates. For example, as illustrated in FIG. 4A, when touch input or handwriting input is performed using the touch pen 5, if the hand touches the touch sensor S <b> 1 or the touch sensor S <b> 2 together with the pen tip of the touch pen 5, the touch sensor Based on the positional relationship between the coordinates detected by S1 and the touch sensor S2, the validity of each coordinate is determined, and it is determined which coordinate is the coordinate of the pen tip that is originally desired to be detected.

  Hereinafter, the flow of the determination method 1 will be described with reference to FIGS. 4 and 7.

  First, when performing touch input or handwriting input using the touch pen 5, a hand touches the touch panel 304 together with the pen tip (step S11). Touch sensor S1 and touch sensor S2 of touch panel 304 detect coordinates P1 and coordinates P2 of the position pressed by the pen tip or hand, respectively (step S12).

  Next, the touch panel controller 305 converts the coordinates P1 and P2 detected by the touch sensor S1 and the touch sensor S2 into coordinates with respect to the reference coordinates P0 of the touch panel 304 (step S13), and the uppermost end of the screen, that is, Coordinates close to the X axis are detected (step S14).

  Next, since the pen tip is closer to the upper end portion of the screen than the hand in the normal handwriting input state, the touch panel controller 305 sets the coordinate P1 close to the upper end portion of the screen as the pen tip coordinate and the coordinate P2. It is determined that the coordinates are in hand (step S15).

  Next, the touch panel controller 305 sets the detection area of the touch sensor S2 that has detected the coordinate P2 determined to be invalid as a detection invalid area. Alternatively, the driving of the touch sensor S2 that detects the coordinate P2 determined to be invalid is stopped (step S16). Here, by stopping the driving of the touch sensor S2 as the detection invalid area, erroneous detection can be prevented with higher accuracy, and power consumption related to the coordinate detection operation of the touch sensor S2 can be reduced.

  Next, the touch panel controller 305 sends the coordinate data of the coordinate P1 determined to be valid to the CPU 311 (step S17). The CPU 311 generates image data based on the received coordinate data of the coordinate P1, and outputs and displays the image data on the display unit 301 via the display control unit 302 (step S18).

(Determination method 2)
FIG. 5 is a schematic diagram illustrating another example of the coordinate validity determination method, and FIG. 8 is a flowchart illustrating a flow according to another example of the coordinate validity determination method. The determination method 2 is to determine the effectiveness of each coordinate based on the relative positional relationship of the touch sensor S that has detected each coordinate when the coordinates are detected at a time by the plurality of touch sensors S. . For example, as shown in FIG. 5A, when touch input or handwriting input is performed using the touch pen 5, the hand touches the touch sensor S <b> 1, touch sensor S <b> 21, and touch sensor 22 together with the pen tip of the touch pen 5. In this case, based on the relative positional relationship of the touch sensor S1, the touch sensor S21, and the touch sensor S22, the validity of the coordinates detected by each touch sensor S is determined, and which coordinate is the coordinate of the nib to be originally detected. Is to discriminate.

  Hereinafter, the flow of the determination method 1 will be described with reference to FIGS. 5 and 8. In the flowchart shown in FIG. 8, the operations in steps S21 to S23 and steps S26 to S28 are the operations in steps S11 to S13 and steps S16 to S18 shown in FIG. Since it is the same as that, its description is omitted.

  In step S24, the touch panel controller 305 touches the touch sensor S1, the touch sensor S21, and the touch sensor S22 that have detected the coordinate P1, the coordinate P21, and the coordinate P22 of the position pressed by the pen tip or the hand, respectively, and are adjacent to each other. The sensor S is detected (step S24).

  Next, since the touch sensor S with which the touch panel touches is likely to be adjacent to each other, the touch panel controller 305 uses the coordinates P21 and P22 detected by the adjacent touch sensors S21 and S22, respectively. The hand coordinates are determined to be invalid (step S25).

(Determination method 3)
FIG. 6 is a schematic diagram illustrating another example of the coordinate validity determination method, and FIG. 9 is a flowchart illustrating a flow according to another example of the coordinate validity determination method. In the determination method 3, when the coordinates are detected at a time by the plurality of touch sensors S, the validity of the coordinates is determined based on the displacement mode of the detected coordinates. For example, as illustrated in FIG. 6A, when touch input or handwriting input is performed using the touch pen 5, when the hand touches the touch sensor S <b> 11 and the touch sensor S <b> 2 together with the pen tip of the touch pen 5, the touch sensor S11, the displacement mode of the coordinates detected by the touch sensor S2, that is, the validity of the coordinates based on the displacement amounts of the coordinates previously detected by the touch sensor S11 and the touch sensor S2 and the coordinates detected this time, respectively. And which coordinate is the coordinate of the nib that is originally desired to be detected.

  Hereinafter, the flow of the determination method 2 will be described with reference to FIGS. 6 and 9. In the flowchart shown in FIG. 9, the operations in steps S31 to S32 and steps S36 to S38 are the operations in steps S11 to S12 and steps S16 to S18 shown in FIG. Since it is the same as that, its description is omitted.

  In step S33, the touch panel controller 305 detects the displacement amount L1 and the displacement amount of the coordinates P11 and P21 previously detected by the touch sensor S11 and the touch sensor S2 of the touch panel 304 and the coordinates P12 and P22 detected this time, respectively. L2 is calculated (step S33), and the calculated displacement amount L1 and displacement amount L2 are compared (step S34).

  Next, the touch panel controller 305 determines that the coordinates P22 of the small displacement L2 are invalid because the coordinates with the small displacement are likely to be coordinates on hand (step S35).

  Following step S38, the future displacement direction of the pen tip coordinate P12 is predicted based on the displacement mode of the coordinate P22 determined as the hand coordinate or the displacement mode of the coordinate P12 determined as the pen tip coordinate, that is, the displacement direction. Then, the effective detection area may be moved. For example, as shown in FIG. 6B, if the displacement direction of the pen tip coordinate P12 or the hand coordinate P22 is the lower right direction on the paper surface, the detection effective region is moved from the touch sensor S11 to the touch sensor S12 adjacent to the right. The drive of the touch sensors S other than the touch sensor S12 is stopped. Thereby, erroneous detection can be prevented with higher accuracy and power consumption can be greatly reduced.

  Thus, in the information input display device 1 according to the present invention, a plurality of area input type touch sensors S for detecting the coordinates of the position on the screen pressed by handwriting input are arranged in two dimensions instead of one. The configuration. When the coordinates are detected at a time by the plurality of touch sensors S, the touch panel controller 305 determines the validity of each coordinate based on the detected positional relationship and displacement mode, and invalidates the coordinates. The detection area of the touch sensor S that has detected the determined coordinates is set as a detection invalid area. Therefore, for example, when performing touch input or handwriting input using the touch pen 5, when the hand H hits the plurality of touch sensors S together with the pen tip 5 a of the touch pen 5, the coordinates are detected by the respective touch sensors S. be able to. Based on the detected positional relationship and displacement mode of each coordinate, it is possible to determine which coordinate is the coordinate of the nib 5a that is originally desired to be detected. As a result, it is possible to prevent erroneous detection due to hand input, and to reproduce original handwritten input information with high accuracy.

  The present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be changed or improved as appropriate. For example, in the above-described embodiment, the determination methods 1 to 3 are executed independently, but these methods may be executed in appropriate combination. Thereby, erroneous detection can be prevented with higher accuracy, and handwritten input information can be reproduced more accurately.

It is a front view which shows the external appearance of the information input display apparatus which concerns on embodiment of this invention. It is a block diagram which shows schematic structure of an information input display apparatus main body. It is a figure which shows the structure of a touch panel. It is a schematic diagram explaining an example of the effectiveness discrimination | determination method of a detected coordinate. It is a schematic diagram explaining another example of the effectiveness discrimination | determination method of a detected coordinate. It is a schematic diagram explaining another example of the effectiveness discrimination | determination method of a detected coordinate. It is a flowchart which shows the flow by an example of the effectiveness determination method of a detected coordinate. It is a flowchart which shows the flow by another example of the validity determination method of a detected coordinate. It is a flowchart which shows the flow by another example of the validity determination method of a detected coordinate. It is a figure which shows the structure of the conventional touch panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information input display apparatus 3 Information input display apparatus main body 301 Display part 302 Display control part 303 VRAM
304 Touch Panel 305 Touch Panel Controller 311 CPU
312 FlashROM
313 SDRAM
314 Communication unit 315 External I / F
317 Operation unit 318 Power switch 319 Four-way key 321 Battery 5 Touch pen H Hand S S Touch sensor P Coordinate

Claims (7)

In an information input display device capable of displaying an image based on information handwritten on the screen,
A plurality of area input type coordinate detection units that detect coordinates of a position on a screen that is arranged two-dimensionally and pressed by handwriting input;
A coordinate determination unit for determining the validity of the coordinates detected by the coordinate detection unit,
When coordinates are detected at a time by a plurality of the coordinate detection units,
The coordinate discriminating unit discriminates the validity of each coordinate based on the positional relationship and / or displacement mode of each detected coordinate, and the coordinate detecting unit detects the coordinate discriminated as invalid. An information input display device characterized in that a detection area is a detection invalid area. When coordinates are detected at a time by a plurality of the coordinate detection units,
2. The information according to claim 1, wherein the coordinate determination unit determines that the coordinates closest to the upper end of the screen among the detected coordinates are valid and determines other coordinates as invalid. Input display device. When coordinates are detected at a time by a plurality of the coordinate detection units,
The said coordinate discrimination | determination part discriminate | determines that the coordinate detected by the said adjacent coordinate detection part among the several said coordinate detection parts which detected each coordinate is invalid. Information input display device. When coordinates are detected at a time by a plurality of the coordinate detection units,
The coordinate discriminating unit discriminates that the coordinate having the largest displacement amount between the previously detected coordinate and the currently detected coordinate among the detected coordinates is valid, and discriminates other coordinates as invalid. The information input display device according to any one of claims 1 to 3. The coordinate determination unit
The detection area of the coordinate detection unit that has detected the coordinates determined to be valid is a detection effective area,
The information input according to any one of claims 1 to 4, wherein the effective detection area is moved based on a displacement direction of a coordinate detected this time with respect to a previously detected coordinate determined to be valid. Display device. The coordinate determination unit
The detection area of the coordinate detection unit that has detected the coordinates determined to be valid is a detection effective area,
5. The information input according to claim 1, wherein the effective detection area is moved based on a displacement direction of the currently detected coordinate with respect to the previously detected coordinate determined to be invalid. 6. Display device. The coordinate determination unit controls driving of the plurality of coordinate detection units,
The information input display device according to claim 5 or 6, wherein driving of a coordinate detection unit other than the coordinate detection unit as the effective detection area is stopped.

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