JP2013239102A - Coordinate instruction device and interactive white board device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coordinate instruction device capable of making a coordinate instruction position detected without installation of a retroreflection frame, and to provide an interactive white board device, regarding a digitizer device using recursive light.SOLUTION: A coordinate instruction device includes a retroreflection member wrapped around the tip side of a coordinate instruction device body. The coordinate instruction device also includes a transmission member protecting the surface of the retroreflection member around the retroreflection member.

Description

  The present invention relates to a coordinate detection device (digitizer device) that detects a coordinate position using an image sensor and an electronic blackboard device.

  In recent years, electronic whiteboards (Interactive White Board, IWB for short) have been spreading. IWB uses PDPs, LCDs, projectors, etc., which are used as general display devices, and uses coordinate input means such as fingers and electronic pens and digitizer devices on the display screen as if they were input with chalk on the blackboard. Then, the coordinates of the position input by the coordinate input means are processed by an arithmetic device such as a personal computer (PC), and the processing result is projected onto a display device.

Digitizer devices that use image processing by image sensors have been spreading in recent years, and the number of uses has been increasing year by year due to the good drawing responsiveness and strong resistance to external noise such as infrared rays, sunlight, and temperature changes. The following is a typical patent document using such an image sensor.

JP-A-9-91094 (Coordinate detection device for touch panel)

A digitizer device using an image sensor includes an image sensor (left image sensor and right image sensor) attached to both ends (left and right ends) of the support member constituting the digitizer unit, and the field of view of each image sensor. A plurality of light emitting units that emit light toward a coordinate input surface positioned in the direction, and configured to detect a coordinate indication position by a coordinate indication object inserted into the coordinate input surface.
FIG. 3 is a system configuration diagram showing a schematic configuration of a conventional digitizer device, which includes a control unit 10 constituting a digitizer unit DU, and light emitting units 11L attached to both ends of the long axis direction of the control unit 10. 11R, image sensors 12L, 12R, an electronic pen 13 as a coordinate indicator, and infrared rays emitted from the electronic pen 13 when the electronic pen 13 comes into contact with the coordinate input surface 18, and a pen-down signal is transmitted to the control unit 10. The infrared light receiving unit 14 is input to the control unit 10, and the control unit 10 inserts coordinates on the coordinate input surface of the electronic pen 13 on the basis of the light-shielded image that blocks the irradiation light from the light emitting units 11L and 11R at the timing when the pen down signal is input. Detect the location and use a personal computer ( C) and sends it to the 20. The PC 20 generates a predetermined drawing image at the detected coordinate position and causes the projector 30 to display it on the wall or the whiteboard 1. As a result, a drawn image corresponding to the locus of coordinates detected by the control unit 10 is displayed on the whiteboard 1.

Here, the entire coordinate input surface can be detected so that the irradiation light emitted from the plurality of light emitting elements 110 constituting the left and right light emitting units 11L and 11R can be detected no matter where the electronic pen 13 is inserted into the coordinate input surface 18. Is scanned at a scanning angle θ.
A retroreflective frame (retroreflective tape) 15 that retroreflects the irradiation light 16 is attached around the coordinate input surface 18.
The image sensors 12 </ b> L and 12 </ b> R receive the irradiation light reflected by the retroreflective member 15 attached around the coordinate input surface 18, but when the electronic pen 13 contacts the coordinate input surface 18, the electronic pen 13 Therefore, the reflected light is not input at the irradiation timing of the irradiation light. The control unit 10 calculates and outputs the position of the light-shielded image when the irradiation light is blocked based on the principle of the triangulation method.

  In addition, since the method for calculating the contact position of the electronic pen 13 based on the principle of the triangulation method is disclosed in the aforementioned Patent Document 1, the description thereof is omitted.

  As shown in FIG. 3, the retroreflective frame 15 is disposed so as to surround the drawing range, and the retroreflective frame is essential in the conventional electronic blackboard using the retroreflective light.

  An object of the present invention is to provide a coordinate pointing device and an electronic blackboard device capable of detecting a coordinate pointing position without installing a retroreflective frame in a digitizer device that uses retrolight.

In order to achieve the above object, a coordinate pointing device according to the present invention includes a retroreflective member wound around the distal end side of the coordinate pointing device main body.
Furthermore, it has a transmission member that protects the surface of the retroreflective member around the retroreflective member.
Further, the electronic blackboard device according to the present invention has a plurality of light emitting units that irradiate irradiation light toward a coordinate input surface constituted by a wall surface or a white board, and a retroreflective member wound around the front end side, A coordinate indicating device that retroreflects the irradiation light emitted from the plurality of light emitting units by the retroreflective member, a plurality of image sensors that receive the retroreflected light, and reception of the retroreflected light received by the image sensor. Coordinate detection means for detecting a designated coordinate position on a coordinate input surface of the coordinate designating device based on timing is provided.

According to the present invention, the irradiation light irradiated toward the coordinate input surface is retroreflected in the same direction as the incident direction by the retroreflective member wound around the distal end side of the coordinate pointing device body, and is applied to both ends of the coordinate input surface. The light enters the attached image sensor, and the indicated coordinate position is detected by the light reception timing.
That is, conventionally, the retroreflective member is attached around the coordinate input surface, and the coordinate pointing position is detected based on the position of the light-shielded image when the coordinate pointing device blocks the irradiation light. , A retroreflective member is wound around the coordinate pointing device body, the irradiation light is retroreflected by this retroreflective member, incident on the image sensor, and the indicated coordinate position is detected by the light receiving timing of the incident light. Therefore, the retroreflective member attached around the coordinate input surface becomes unnecessary, and the coordinate input position can be detected. In particular, as the area of the coordinate input surface increases, the amount of use of the retroreflective member can be significantly reduced, and the cost can be reduced.

It is the front view and sectional drawing which show embodiment of the coordinate instruction | indication apparatus in this invention. It is the front view and perspective view which show other embodiment of the coordinate instruction | indication apparatus in this invention. It is a whole block diagram of the conventional digitizer apparatus.

Hereinafter, an embodiment for carrying out the present invention will be specifically described with reference to the drawings.
FIGS. 1A and 1B are a front view and a cross-sectional view showing an embodiment of a coordinate pointing device according to the present invention.
As shown in these drawings, the coordinate pointing device main body 1 is configured so that a retroreflective tape 2 is wound around a cylindrical tip end and the periphery thereof is protected by an irradiation light transmission protection member 3. This prevents direct contact with the retroreflective tape 2 at the tip and prevents deterioration of reflected light due to dirt or the like. The pen tip 4 is configured to prevent scratches when drawing on a whiteboard or the like by using a member having a small friction coefficient.

According to such a configuration, the irradiation light irradiated toward the coordinate input surface is retroreflected in the same direction as the incident direction by the retroreflective member wound around the distal end side of the coordinate pointing device main body, It is incident on image sensors attached to both ends, and the indicated coordinate position is detected by the light reception timing.
That is, conventionally, the retroreflective member is attached around the coordinate input surface, and the coordinate pointing position is detected based on the position of the light-shielded image when the coordinate pointing device blocks the irradiation light. , A retroreflective member is wound around the coordinate pointing device body, the irradiation light is retroreflected by this retroreflective member, incident on the image sensor, and the indicated coordinate position is detected by the light receiving timing of the incident light. Therefore, the retroreflective member attached around the coordinate input surface becomes unnecessary, and the coordinate input position can be detected. In particular, as the area of the coordinate input surface increases, the amount of use of the retroreflective member can be significantly reduced, and the cost can be reduced.

FIG. 3 is a front view and a perspective view showing another embodiment of the coordinate pointing device according to the present invention.
In this embodiment, the shape on the tip side is round or polygonal (hexagonal in the figure), and the retroreflective member 2 is wound in a circle or polygon to the tip portion excluding the pen tip 4, as shown in FIG. 2 (b). In addition, even when the coordinate pointing device main body 1 is largely tilted so as to be substantially close to the waterside surface on the coordinate input surface, the retroreflected light is input to the image sensor.

  In addition, although illustration is abbreviate | omitted, it can be set as the circuit structure which incorporates a solar cell panel in the coordinate pointing device main body 1, stores it in a secondary battery, and transmits a pen down signal with the electric power of this secondary battery.

  In the configuration of the electronic blackboard device using the coordinate pointing device of the present invention, the electronic pen 13 of FIG. 3 is changed to the coordinate pointing device 1 of the present invention, the retroreflective frame 15 is deleted, and the retroreflected light is the main light. The coordinate input device 1 is configured to be input to the image sensor from the front end side of the coordinate pointing device 1 according to the invention, and the coordinate input position is detected by reflected light from the front end side of the coordinate pointing device 1 instead of the light-shielded image of the electronic pen.

DESCRIPTION OF SYMBOLS 1 Coordinate indication apparatus main body 2 Retroreflective tape 3 Irradiation light transmission protection member 4 Pen tip DU Digitizer unit 9 Coordinate input surface 10 Control unit 11L, 11R Light emission unit 12L, 12R Image sensor 13 Electronic pen 14 Infrared light receiving unit 15 Retroreflection member 16 Irradiation light 17 Retroreflected light 18 Coordinate input surface 20 Personal computer 30 Projector

Claims (3)

  A coordinate pointing device comprising a retroreflective member wound around the distal end side of the coordinate pointing device main body.   The coordinate pointing device according to claim 1, further comprising a transmissive member that protects a surface of the retroreflective member around the retroreflective member.   Irradiation light that has a plurality of light emitting units that irradiate irradiation light toward a coordinate input surface constituted by a wall surface or a whiteboard, and a retroreflective member that is wound around the tip side, and is irradiated from the plurality of light emitting units. A coordinate pointing device that retroreflects the retroreflective member, a plurality of image sensors that receive the retroreflected light, and a coordinate input surface of the coordinate pointing device based on the light reception timing of the retroreflected light received by the image sensor An electronic blackboard device comprising coordinate detection means for detecting an indicated coordinate position in

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