JP4901672B2 - Electronic board system - Google Patents

Description

  The present invention relates to an electronic board system that simultaneously receives instruction states of a plurality of coordinate indicators and issues a preset event according to a combination of the instruction states.

Conventionally, an operation screen generated by a screen generation device of a personal computer is projected onto an electronic board by a display screen projection device, and a character object is displayed by a finger or a dedicated electronic pen that can perform coordinate input on the displayed operation screen. There is known an electronic board system for drawing and manipulating image objects.
In this electronic board system, the electronic pen is used to write diagrams using various line colors and thicknesses, and also issues events to the system by causing the electronic pen to perform specific movements. It can also be used to execute commands such as set enlargement / reduction and deletion of figures.
Some coordinate input devices for electronic boards can input not only one point but also two or more points at the same time. As a method of inputting the coordinates of a plurality of points, for example, there is a method using a shadow as disclosed in Patent Document 1 below.
In the case of a method of inputting coordinates by shadow, it is difficult to delimit the transition of the input state, but as a method of preventing a series of input state transitions from being detected as consecutive different events, There is one that does not detect an event (Patent Document 2).

JP 2000-132339 A JP2002-259041

When an event is issued by combining a plurality of movements of a coordinate indicator such as an electronic pen, it may be erroneously recognized as a combination of different movements depending on a state in the middle of a transition from a certain state to a certain state.
For example, in an electronic board that can input coordinates of a plurality of points at the same time, an event can be issued not only by movement of one electronic pen but also by a combination of movements of a plurality of electronic pens. In order to issue different events, the combination of movements of the electronic pen becomes complicated, such as “do not move for a while after pen down”, with multiple electronic pens “pen down and pen up two electronic pens simultaneously” There is an advantage that a combination of simple movements such as “two electronic pens are spread down sideways after pen-down” can be achieved. However, even if the user intends to pen down a plurality of electronic pens at the same time, it may be input to the system as a series of separate operations, resulting in an erroneous operation.

  An object of the present invention is to provide an electronic board system capable of suppressing the occurrence of erroneous operations when receiving the states of a plurality of coordinate indicators simultaneously and issuing a preset event depending on the combination of the states. There is.

In order to achieve the above object, an electronic board system according to the present invention is an electronic board system that issues an event set in advance by a combination of indication states of a plurality of coordinate indicators indicating an arbitrary position on a coordinate input surface. ,
Storage means for sequentially receiving input information including indicator size information, coordinate position information, and indicated object number information in accordance with the indication state of the plurality of coordinate indicators, and sequentially storing the input information as history information, and an input Each time information is received sequentially, it is determined whether it is within a specified time since the first input information was received or the number of history information stored in the storage means is within a specified number. If it is within, the event is issued based on the history information having a high frequency among the history information accumulated in the storage means, and if the accumulated number of history information is not within the specified number within the predetermined time, the current And a means for issuing an event based on the input information.

  According to the present invention, the input information is sequentially stored, and an event is issued based on the input information having a high frequency in the stored input information. It is possible to suppress erroneously recognizing the operation content with stable input information. Thereby, it is possible to issue a plurality of types of events and execute commands with a simple movement of a coordinate pointing object such as a plurality of electronic pens.

Hereinafter, an embodiment of an electronic board system according to the present invention will be described with reference to the drawings.
FIG. 1 is a system configuration diagram showing an embodiment of an electronic board system according to the present invention.
The electronic board system of this embodiment includes an electronic board 101, an input pen 102, a display screen projection display device 103, a control computer 104, a keyboard 105 attached to the control computer 104, and a display device 106.
The control computer 103 has the same function as a general-purpose personal computer, and a display content control program 1041 for processing character objects and image objects is stored in the internal memory.
The electronic board 101 is provided with an input area 107 that can simultaneously detect a plurality of position coordinates and input object sizes at the time of an input operation with the input pen 102 or the user's finger.

FIG. 2 is a schematic diagram illustrating an example of a coordinate detection apparatus that can detect input coordinates at a plurality of positions and the size of an input object at the input coordinates with respect to the coordinate detection of the input area 107.
The input area 107 emits a rectangular coordinate input surface 201 for inputting coordinates with an input pen, a finger 102, and the like, and irradiation light spreading in a fan shape along the coordinate input surface 201, and travels along the coordinate input surface 201. An optical unit 202 that receives reflected light (the image sensor on the left side is 202L and the image sensor on the right side is 202R), and the irradiation light emitted from the optical unit 202 is arranged on the outer edge of the coordinate input surface 201. , And a detection information processing device 204 that converts information received by the left and right image sensors 202L and 202R from the reflection unit 203 into coordinate information and size information of the input object.
The conversion to the coordinate information and the size information of the input object is performed by recognizing a range where the irradiation light of each of the image sensors 202R and 202L is blocked by the input pen or the finger 102.

FIG. 3 is a diagram showing an input state that can be detected by the detection information processing apparatus 204.
In this system, a one-point input state in which only one finger is in contact with the coordinate input surface 201, a two-point input state in which two fingers are simultaneously in contact with the coordinate input surface 201, and the entire palm on the coordinate input surface 201 It is possible to detect the palm input state in contact. These states transition to each other depending on the contact state between the hand and the coordinate input surface 201.

FIG. 4 is a diagram showing the structure of packet data for each input event regarding the information notified from the detection information processing apparatus 204 to the control computer 104.
The information notified from the detection information processing apparatus 204 includes the number of detected objects 402 such as an input pen and a finger existing on the coordinate input surface 201, coordinate information 403 and detected object size information 404 for each detected object as one input data. 401 is handled.
When no object is in contact with the coordinate input surface 201, packet data with detected object number information “0” is sent as input data (packet data example 405).
When only one finger or input pen 102 is in contact with the coordinate input surface 201, the number of detected objects is “1”, and packet data of coordinate information and detected object size information is input for the number of detected objects. It is sent as data (packet data example 406). In this case, when the number of detected objects is “1” and the size of the detected object is determined to be a small object equal to or less than the threshold value specified from the detected object size information, it is determined that the input is a single point.
When the finger or the input pen 102 is in contact with the coordinate input surface 201, the number of detected objects is “2”, and packet data of coordinate information and detected object size information is input data for each detected object number. It is sent (packet data example 407). In this case, since the number of detected objects is “2”, it is determined that the input is two points.
When the coordinate input surface 201 is in contact with the palm, the number of detected objects is “1”, and packet data of coordinate information and detected object size information is sent as input data for the number of detected objects (example of packet data). 408). In this case, it is determined that the input is a palm input by determining that the number of detected objects is “1” and the size of the input object is larger than the threshold value specified from the detected object size information.

FIG. 5 is a diagram illustrating an example of a hand movement during an input start operation when attempting to contact the coordinate input surface 201 with two fingers or a palm.
When an attempt is made to touch the coordinate input surface 201 with two fingers as indicated by reference numeral 501, the second finger is operated so as to touch the coordinate input surface 201 from the state in which the first finger touches the coordinate input surface 201. There are many cases. In this case, it is detected that the input state is changed from the one-finger input state to the two-finger input state.
Further, when an attempt is made to contact the coordinate input surface 201 with a palm as indicated by 502, the coordinate input surface 201 is often operated to touch the coordinate input surface 201 from a part of the palm such as the tip of a finger. In this case, it is detected that the input state of one finger has changed to the input state of the palm.
What can be said in common in both cases is that even if the operator is aware of a two-point input or palm input operation, the detection information processing apparatus 204 first executes an input operation with one finger and then continues. It is determined that the input operation has been started. For this reason, the operation conscious of the operator is different from the operation detected by the apparatus, and an erroneous input not conscious of the operator occurs.

FIG. 6 is a graph showing changes in input data during an input start operation when trying to contact the coordinate input surface 201 with two fingers or the palm.
When trying to touch the coordinate input surface 201 with two fingers, the first finger is detected at time P1 from the start of input as shown in the graph 601, and the information processing apparatus 204 detects that the input is a single finger. To be notified. Thereafter, the second finger is detected at time P2, and the detected information processing apparatus 204 notifies that the input is a two-finger input. Thereafter, detection of two-finger input continues.
Also, when trying to contact the coordinate input surface 201 with the palm, the shadow size at the time of one-finger input is detected at time P′1 from the start of input as shown in the graph 602, and the detected information processing apparatus 204. Thereafter, when the time P′2 comes, the size of the shadow at the time of palm input is detected and notified from the detected information processing apparatus 204. After that, the detection of the size of the shadow of the palm input continues.

FIG. 7 is a block diagram showing a configuration of erroneous input preventing means that is a function of the display content control program 1041 stored in the internal memory of the control computer 104.
The input data analysis unit 701 decomposes the input data 401 notified from the detected information processing apparatus 204 into detected object number information 402, coordinate information 403, and detected object size information 404.
The execution function control unit 702 controls information to be reflected on the display device using the decomposed input information and the history of the input information stored in the input information storage unit 703, and stores the newly extracted input information in the input information storage. The information is sequentially stored in the unit 703 as the latest history information.

FIG. 8 is a flowchart showing processing in the erroneous input preventing means of FIG.
First, the erroneous input preventing means initializes the input information history when the input start is detected (step 801). Then, input information is acquired, and input object number information, coordinate information, and input object size information are extracted (step 802).
Next, it is determined whether the history information is within a specified number or within a specified time from the start of input (step 803). If the history information is within the specified number or within the specified time from the start of input, it is determined whether the input object number information is “0” (step 804).
If the input object number information is “0”, the most frequently used input method in the stored history information (in this embodiment, one finger, two fingers, or palm) is set as an issue event. (Step 805).
If the input object number information is not “0”, the latest input information is stored as a history, and the input information is acquired again (step 806).
If more than the specified number of history information has been stored or more than the specified time has elapsed since the start of input, the latest input information is set as an issue event (step 807).
Finally, the event created in step 805 or step 807 is issued and reflected as a display result of the display device 106.

1 is a system configuration diagram showing an embodiment of an electronic board system according to the present invention. It is the schematic which showed an example of the coordinate detection apparatus which can detect the input coordinate in a some position, and the magnitude | size of the input object in an input coordinate. It is the figure which showed the input state which can be detected with the detection information processing apparatus used by this invention. It is the figure which showed the data structure of the input information from a coordinate detection apparatus. It is the figure which showed the example of the movement of the hand at the time of an input start operation | movement when it is going to input with two fingers or a palm to an electronic board. It is the graph which showed the change of the input data at the time of the input start operation | movement when it is going to input with two fingers or the palm to an electronic board. It is a block diagram which shows the structure of an incorrect input prevention means. It is a flowchart which shows the process in an incorrect input prevention means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Electronic board 102 Input pen 103 Display screen projection apparatus 104 Control computer 105 Keyboard 106 Display apparatus 107 Input area 1041 Display processing program 201 Coordinate input surface 202R Image sensor (right side)
202L image sensor (left side)
DESCRIPTION OF SYMBOLS 203 Reflection part 204 Detection information processing apparatus 401 Input data 402 Number of detected objects 403 Coordinate information 404 Detected object size information 701 Input information analysis part 702 Execution function control part 703 Input information storage part

Claims (1)

In an electronic board system that issues an event set in advance by a combination of indication states of a plurality of coordinate indicators indicating an arbitrary position on a coordinate input surface,
Storage means for sequentially receiving input information including indicator size information, coordinate position information, and indicated object number information in accordance with the indication state of the plurality of coordinate indicators, and sequentially storing the input information as history information, and an input Each time information is received sequentially, it is determined whether it is within a specified time since the first input information was received or the number of history information stored in the storage means is within a specified number. If it is within, the event is issued based on the history information having a high frequency among the history information accumulated in the storage means, and if the accumulated number of history information is not within the specified number within the predetermined time, the current An electronic board system comprising means for issuing an event based on the input information.

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