JP4901670B2 - Electronic board system - Google Patents

Description

  The present invention relates to an electronic board system that receives an instruction state of a plurality of coordinate pointing objects 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 obtained by performing coordinate input with a finger or a dedicated electronic pen on the displayed coordinate input surface. An electronic board system that draws images and manipulates image objects is known.
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 for inputting the coordinates of a plurality of points, for example, there is a method using a shadow as disclosed in Patent Document 1 below.
When shadows are used, malfunctions may occur depending on how the shadows are created, but as a method of causing the user's intended actions in a system where erroneous operations / malfunctions occur, priority is given to operations within a predetermined period. There is one that adopts a high one (Patent Document 2).

JP 2000-132339 A JP-A-2005-204251

Some electronic board mounting methods have a high rate of erroneous detection of input states.
For example, a digitizer that detects the input position based on the size and position of the shadow only needs to be close to the board surface in order to input the coordinates. May erroneously detect the input state.
In particular, when a plurality of coordinates are input simultaneously by a plurality of fingers, the second finger is hidden by the first finger with respect to the sensor depending on the positional relationship between the sensor, the first finger, and the second finger. The second finger may be difficult to see.
If this phenomenon occurs when moving while moving to a certain position, the system mistakenly detects that the two-finger input is lost, even though the operator continues the two-finger input. Resulting in.

  An object of the present invention is to provide an electronic board system capable of preventing a coordinate input state from being erroneously detected against an operator's intention even when the input state changes during coordinate input.

In order to achieve the above object, the present invention provides an electronic board system for issuing an event set in advance by a combination of coordinate input states by a plurality of coordinate indicators indicating an arbitrary position of a coordinate input surface. When the state changes, it is determined whether the change state is a change to a predetermined high priority state, the change to the high priority state is valid, and the change to the low priority state is A means for invalidating is provided.
In addition, the priority is set such that a higher priority is set in order of increasing shadow size of the coordinate pointing object.

  According to the present invention, when the coordinate input state changes, a change to a higher priority state is valid, a change to a lower priority state is invalid, and the same state is maintained while touching the coordinate input surface. By correcting the coordinate input state detected so that the input is continued, it is possible to prevent the coordinate input state from being erroneously detected against the operator's intention.

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 the input pen 102 or a finger, etc., 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 (an optical unit on the left side is an image sensor 202L, an optical unit on the right side is an image sensor 202R), and an irradiation emitted by the optical unit 202 that is disposed on the outer edge of the coordinate input unit 201 A reflection unit 203 that recursively reflects light in the incident direction, and a detection information processing device 204 that converts information received by the left and right optical units 202 from the reflection unit 203 into coordinate information and size information of an input object.
The conversion to the coordinate information and the size information of the input object is performed based on a recognition result of 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, one-point input state where only one finger is in contact with the electronic board, two-point input state where two fingers are simultaneously in contact with the electronic board, and a palm-input state where the entire palm is in contact with the electronic board Can be detected.
These states transition to each other depending on the contact state between the hand and the board, and in some cases may unintentionally transition.

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 there is no object on the coordinate input surface 201, packet data whose detected object number information is “0” is sent as input data (packet data example 405). When only one finger or input pen is in contact with the coordinate input surface 201, the number of detected objects is “1”, and coordinate information and detected object size information data are sent as input data for the number of detected objects. (Packet data example 406). In this case, when it is determined that the number of detected objects is “1” and the size of the input object is a small object equal to or smaller than the threshold value specified from the detected object size information, it is determined that the input is one point.
When two fingers or input pens are in contact with the coordinate input surface 201, the number of detected objects is “2”, and coordinate information and detected object size information data are sent as input data to each detected object number. (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 inputting to the coordinate input surface 201 with a palm, the number of detected objects is “1”, and coordinate information and detected object size information data are sent as input data for the number of detected objects (packet data example 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 erroneous detection that may occur in the present system.
Even if it is intended to continue as it is in the one-point input state near the body, if it is moved away from the body, the finger falls asleep and enters the palm input state (FIG. 5A).
Further, when the finger is moved away from the body from the two-point input state, one finger is separated from the board surface and the one-point input state is entered (FIG. 5B).
In addition, since the shadow is detected, it becomes the shadow of the first finger from the image sensor, and when the second finger cannot be detected, the position of the first finger and the second finger are close, so one large shadow There is a case where it is erroneously detected that there is a palm input state (FIG. 5C).
These erroneous detections are more likely to occur when the finger is moved from the input start state.

FIG. 6 is a block diagram showing a functional configuration of event issuing means of the display content control program 1041 stored in the internal memory of the control computer 104.
The input data analysis unit 601 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 event creation processing unit 602 stores the detected object number information 402 and the detected object size information 404 extracted by the input information analysis unit 601, the event priority stored in the event priority storage unit 603, and the issued event storage unit 604. The event to be issued is created for the input data using the event information immediately before.
The event created by the event creation processing unit 602 is issued by the event issuing processing unit 605, and the result is reflected on the display device 106.
The issued event is stored in the issued event storage unit 604 so that it can be referred to in the process of creating the issued event for the next input event.

FIG. 7 is a flowchart showing the processing of the event issuing means of FIG.
First, when coordinate input is started, the event information and event priority information in the immediately previous issue event stored in the issue event storage unit 604 are initialized (step 701).
Next, input data is acquired, and input object number information, coordinate information, and input object size information are extracted from the input data (step 702).
Next, based on the input object number information and the input object size information, it is determined whether the input event is a one-point event, a palm event, or a two-point event, and an input event is created (steps 703 to 708).
If the event is a finger release, an up event is issued based on the immediately preceding issue event information stored in the issue event storage unit 604 (step 709).
Next, the event priority of the input event is acquired from the event priority storage unit 603 using the created input event information (step 710).
The event priority information in the immediately preceding issue event stored in the issue event storage unit 604 is compared with the input event priority (step 711).
If the priority of the input event is high, the input event information is used for the current issue event (step 712).
However, if the event priority of the immediately preceding issue event is high, the immediately preceding event is continuously used for the current issue event (step 713). In other words, when the priority of the immediately preceding issue event is high, the current input event is treated as invalid, and valid only in the opposite case.
Finally, the event information issued after the event is issued is stored in the issue event storage unit 604, step 702 is executed again, and the next input data is acquired (steps 714 and 715). These processes are repeated until an up event is detected.
Event priorities are set higher in descending order of shadow size. That is, the priority of palm input is the highest, and then the priority is set in the order of 2-point input and 1-point input.

FIG. 8 is an explanatory diagram showing an application example of event priority. When the immediately preceding issue event is as shown in FIG. 8, it is shown how the event issued by the system changes due to the input event from the hardware.
Therefore, when the operator is performing two-point input, even if it is detected that the hardware is in a one-point input state due to a change in the size of the finger shadow, the two-point input continues. As a result, the detection output of the hardware is corrected.
This suppresses the occurrence of unnaturally changing events.

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 a detection information processing apparatus. It is the figure which showed the data structure for every input event about the information notified to the control computer from the detection information processing apparatus. It is explanatory drawing which shows the false detection which may generate | occur | produce in this system. It is a block diagram which shows the function structure of the event issuing means of the display content control program stored in the internal memory of the computer for control. It is a flowchart which shows the process of an event issuing means. It is an application example of event priority.

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 Detected object number information 403 Coordinate information 404 Detected object size information 601 Input information analysis part 602 Event creation processing part 603 Event priority storage part 604 Issue event storage part 605 Event issue processing part

Claims (2)

In an electronic board system that issues a preset event by a combination of coordinate input states by a plurality of coordinate indicators that indicate an arbitrary position on the coordinate input surface,
When the coordinate input state changes, it is determined whether the change state is a change to a predetermined high priority state, the change to the high priority state is valid, and the low priority state is entered. An electronic board system comprising means for invalidating changes in   2. The electronic board system according to claim 1, wherein the priority is set in a descending order in which the shadow size of the coordinate pointing object increases.

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