JP2006189706A - Light pen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light pen capable of confirming the start position of writing in beginning to draw letters or the like by using an external instrument capable of displaying the track of a luminous point. <P>SOLUTION: The light pen 1 includes a light emitting part 30 arranged at the tip part of the pen main body 10, for emitting light so as to indicate the position of the tip part of the pen main body 10, a transmission part 40 for transmitting a trajectory display signal for displaying the trajectory of the light emitting part 30, and a stroke-pressure type switch 60 for selectively outputting the trajectory display signal from the transmission part 40. The ON/OFF state of the switch 60 is switched in accordance with the pressurizing force toward the tip part of the pen main body 10. Regarding such the light pen 1, in transmitting the trajectory display signal from the transmission part 40 to the prescribed external instrument capable of displaying the trajectory of the luminous point of the light emitting part 30, a point mark corresponding to the luminous point of the light emitting part 30 can be displayed on a data image displayed on the external instrument from the start. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light pen that is a light emitting device used as an instruction means in a presentation, and more particularly to a technique for displaying a locus of a light emitting point of a light emitting unit of a light pen.

  In the presentation, when the presenter gives an explanation by giving a predetermined location in the image of the material, an instruction means is used. Conventionally, a laser pointer has been used as the instruction means. However, in the case of a laser pointer, there are safety problems such as laser light being erroneously projected and entering the human eye, and problems such as high power consumption.

  Accordingly, the present applicant uses the material presentation device to virtually generate a virtual screen on the material placement table on which the material is placed, and causes the light pen light emitting unit to emit light to the material, thereby emitting light on the virtual screen. It is proposed that a predetermined pointer image is synthesized with an image of a material based on the position information of the point and displayed on a display device to instruct a predetermined location in the image of the material (for example, Patent Document 1). reference).

Japanese Patent Application No. 2003-087542 (Summary)

  Specifically, the presenter captures an image of the document by the imaging unit of the document presentation device, displays the captured image of the document on a screen or a monitor that is a display device, and then uses a pen pressure light pen as a light pen. The light emitting unit is caused to emit light by pressing the tip of the pen body against the material on the material mounting table. The emission point is captured by the imaging unit of the document presentation device, and the captured image is captured by the control unit, where the coordinates of the emission point on the virtual screen are calculated, and the coordinates in the image of the document corresponding to the calculated coordinates A pointer image such as a pointer mark is combined with the image and displayed on the display device. With such a pointer image, a predetermined position of the material image can be instructed to the viewer.

  Moreover, in such a material presentation device, in addition to the pointing mode as described above, a drawing mode can be executed. Specifically, the presenter operates a predetermined switch to switch from the pointing mode to the drawing mode, and presses the tip of the pen body against the document using the above-described pressure-sensitive light pen while causing the light emitting unit to emit light. Move. In this case, the images of the light emitting points taken sequentially by the imaging unit are taken into the control unit of the material presentation device, where the coordinates of the light emitting points on the virtual screen are sequentially calculated to obtain the locus of the light emitting points, corresponding to the locus The image obtained by tracing the locus of the light emitting point is synthesized with the coordinates in the image of the material.

  By the way, in the pointing mode as described above, when the light emitting portion of the pen pressure light pen receives the pen pressure and emits light, only the pointer mark is displayed on the image of the material. For this reason, even if the light pen is moved while the light emitting unit emits light, the locus of the light emitting unit does not remain on the image of the material, and thus the locus of the light emitting point cannot be drawn. In addition, when switching from the pointing mode to the drawing mode by operating a predetermined switch as described above, if the pointer mark is not displayed from the beginning in the document image, the starting position for drawing the character or the like is known. There was no inconvenience.

  Therefore, according to the present invention, when switching to the drawing mode, the pointer mark corresponding to the light emitting point of the light emitting unit is displayed on the document image from the beginning, so that the writing position of characters and the like can be known and the drawing mode is turned on. An object of the present invention is to provide a light pen that can easily switch between the / OFF states.

  The light pen of the present invention includes a pen body, a light emitting section that is provided at the tip of the pen body, emits light for indicating the position of the tip of the pen body, and a locus for displaying the locus of the light emitting section. An output unit that outputs a display signal and a switch for selectively outputting a trajectory display signal from the output unit are provided.

  In the light pen of the present invention, the locus display signal for displaying the locus of the light emitting unit can be selectively output from the output unit by operating the switch while the light emitting unit emits light. When a locus display signal is transmitted from the output unit to a predetermined external device capable of displaying the locus of the light emitting point, a pointer mark corresponding to the light emitting point of the light emitting unit is displayed on the external device. It can be displayed from the beginning on the material image.

  Examples of the external device include the following material presentation device. That is, the material presentation device performs image processing on a material placement unit having a material placement surface on which the material is placed, an imaging unit that photographs the material, and a captured image of the material photographed by the imaging unit, Control means for outputting a photographed image of the processed material to a display device, the material is instructed by a light emitting point, the imaging means sequentially photographs the light emitting point on the material, and the control means is image processing. Based on the captured image of the light emitting point captured by the imaging means, when the output unit of the light pen does not output the trajectory display signal, a predetermined pointer image is added to the image of the material displayed on the display device. Executes the pointing mode to synthesize, and executes the drawing mode to synthesize the image that traces the locus of the light emission point with the image of the material displayed on the display device when the output unit of the light pen outputs the locus display signal You It can be configured to.

  When the light pen of the present invention is applied to the material presentation device described above, the light emitting part of the light pen can always be made to emit light as described above, so that the pointer mark corresponding to the light emitting point on the material mounting table Can always be displayed on the image of the material on the display device. As a result, when performing the drawing mode by operating the light pen switch, the pointer mark is displayed on the image of the document on the display device before starting to draw the character etc., so when the presenter starts drawing the character etc. The writing position can be recognized. Therefore, the presenter can start to draw characters and the like from a desired portion of the document image.

  Various configurations can be used for the light pen. As the switch, a pen pressure type switch that switches the ON / OFF state in accordance with the pressing force to the tip of the pen body or a push button type switch can be used. In the case of a pen pressure type switch, as compared with a push button type switch, a button operation for outputting a locus display signal is unnecessary, so that a locus of a light emitting point can be drawn with a simple operation, which is practical. In the case of a push button type switch, it can have a simpler configuration than a pen pressure type switch.

  As the writing pressure type switch, the first switch portion that switches to the ON state when the pressing force to the tip of the pen body reaches the first pressing force setting value, and the pressing force to the tip of the pen body is the first pressing force. A two-stage pressing pressure switch having a second switch portion that switches to an ON state when a second pressing force setting value larger than the setting value is reached may be used. As a push button type switch, a push button, a first switch unit that switches to an ON state when the push button is pushed down the first distance, and a second switch from the state where the push button is pushed down the first distance. A two-stage push-push button type switch having a second switch unit that switches to an ON state when the distance is pressed may be used.

  As the output unit, a transmission unit that selectively transmits a trajectory display signal according to the ON / OFF state of the switch can be used. In this case, the material presentation device to which the light pen of the present invention is applied can include a receiving unit that receives the trajectory display signal. Moreover, the light emission part which selectively emits light as a locus | trajectory display signal according to the ON / OFF state of a switch can be used for an output part. In this case, it is preferable that the light emitting unit selectively emits light having a shape different from that of the light emitting unit at the tip of the pen body in accordance with the ON / OFF state of the switch. Furthermore, the light emission part provided in the front-end | tip part of a pen main body can be used as an output part. In this case, the output unit may selectively emit light having different blinking periods or selectively emit light having different intensities according to the ON / OFF state of the switch. As described above, when the light emitting unit is used as the output unit, the imaging unit of the material presentation device can be used as a detecting unit for various light emission signals of the light emitting unit.

  In addition, when the above-described two-stage pressing pen pressure switch is used as the pen pressure switch, the first switch section can be used for the light emitting section and the second switch section can be used for the output section. Specifically, when the pressing force to the tip of the pen body reaches the first pressing force setting value and the first switch unit is turned on, the light emitting unit emits light and the pen body is turned on. When the pressing force reaches the second pressing force set value and the second switch unit is turned on, the trajectory display signal can be output from the output unit. In such an aspect, since the light emitting unit can selectively emit light according to the pressing force to the tip of the pen body, the light emitting unit can be made to emit light with a simple operation. In addition, since the light emitting unit can emit light only when the tip of the pen body is pressed against the object, power consumption can be suppressed.

  Further, when the above-described two-stage push / push button type switch is used as the push button type switch, the first switch unit can be used for the light emitting unit and the second switch unit can be used for the output unit. Specifically, when the push button is depressed by the first distance and the first switch unit is turned on, the light emitting unit emits light, and the push button is further changed from the state where the first button is depressed by the first distance. When the distance of 2 is pressed and the second switch unit is turned on, a locus display signal can be output from the output unit. In such an aspect, it is possible to have a simple configuration as compared with the two-stage pressing pressure switch.

  According to the light pen of the present invention, the locus display signal for displaying the locus of the light emitting unit can be selectively output from the output unit by operating the switch while the light emitting unit emits light. When a locus display signal is transmitted from the output unit to a predetermined external device that can display the locus of the light emitting point of the light emitting unit, a pointer mark corresponding to the light emitting point of the light emitting unit is displayed on the external device. It is possible to obtain an effect such that the image can be displayed from the beginning on the image of the existing material.

(1) Configuration of Embodiment (A) Light Pen Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged perspective view showing a schematic configuration of a light pen 1 according to an embodiment of the present invention. The light pen 1 has a pen shape. The light pen 1 includes a pen body 10, and a pen tip 20 is detachably provided at the tip of the pen body 10. The nib 20 is provided with a light emitting unit 30 that emits light for indicating the position of the tip of the nib 20 in the axial direction. A transmitter 40 is provided at the rear end of the pen body 10 as an output unit that outputs a trajectory display signal for displaying the trajectory of the light emitting unit 30.

  The light pen 1 also includes a manual switch 50 provided in the pen body 10 as a switch unit for selectively causing the light emitting unit 30 to emit light, and a switch for selectively outputting a locus display signal from the transmitting unit 40. As a means, a pen pressure type switch 60 provided in the pen body 10 is provided. In the following description, the pen tip 20 side in the axial direction of the light pen 1 is referred to as the front end side, and the opposite side is referred to as the rear end side.

  The pen body 10 has a cylindrical shape. Inside the pen body 10, a plurality of batteries (not shown) are provided as power supply means. A female screw portion (not shown) is formed on the inner peripheral surface of the tip portion of the pen body 10.

  The pen tip 20 includes a switch housing 21, and a cap 22 is slidably provided on the distal end side of the switch housing 21.

  The switch housing 21 has a cylindrical shape. A spring (not shown) that biases the cap 22 toward the distal end side in the axial direction of the pen body 10 is housed inside the switch housing 21. A male screw portion 23 is provided at the rear end portion of the switch housing 21. The male screw portion 23 is detachably attached to the pen main body 10 by screwing with the female screw portion on the inner peripheral surface of the tip end portion of the pen main body 10.

  The cap 22 is made of a transparent resin and has a substantially conical shape. The cap 22 is provided on the switch housing 21 so as to be slidable in the axial direction of the pen main body 10 and is urged toward the tip end side in the axial direction of the pen main body 10 by the spring housed in the switch housing 21.

  The light emitting unit 30 is provided inside the cap 22 of the nib 20 and emits light toward the tip of the nib 20. The light emitting unit 30 includes an LED that emits light (for example, infrared light) and a current control element (resistor) that limits the current flowing through the LED to an appropriate value. These portions are resin-molded inside the cap 22. Is fixed.

  The transmitter 40 is provided at the rear end of the pen body 10 and outputs a trajectory display signal for displaying the trajectory of the light emitting unit 30 to an external device (for example, the following material presentation device). As a transmission method of the transmitter 40, there are an infrared method for transmitting infrared rays by wireless and a radio wave method for transmitting radio wave signals.

  The manual switch 50 is configured to manually switch between an ON state in which the light emitting unit 30 emits light and an OFF state in which the light emitting unit 30 does not emit light.

  The pen pressure type switch 60 is normally in an OFF state, and the tip of the cap 22 is pressed, and the cap 22 is against the biasing force of the spring housed in the switch housing 21 so that the cap 22 is in the axis of the pen body 10. The transmitter 40 is configured to be turned on when it moves to the rear end side of the direction at a predetermined interval, and the transmitter 40 outputs a trajectory display signal to the outside. In this case, when the pressure applied to the cap 22 is released, the writing pressure switch 60 returns to the original position by the urging force of the spring and is turned off.

(B) Material Presentation Device The light pen 1 having the above configuration is preferably applied to a material presentation device 100 as shown in FIGS. 2 is a schematic configuration diagram of the material presentation device 100, and FIG. 3 is a diagram for explaining the configuration and functions of the material presentation device 100.

  The material presentation device 100 includes a material placement table (material placement means) 110 as a base of the device. The material placing table 110 has a material placing surface 111 on which a material (for example, the original M) is placed. A monitor 120 is attached to the rear end portion of the document mounting table 110 through a hinge mechanism 112 so as to be opened and closed. The opening angle of the monitor 120 is appropriately adjusted manually. The monitor 120 is visually recognized by a presenter (not shown) with the screen facing the front side in an open state as shown in FIG.

  An arm 113 is attached to the left corner of the rear end portion of the material mounting table 110. The arm 113 includes a column portion 113a erected in the vertical direction, and an L-shaped horizontal portion provided so that the tip end portion is positioned substantially above the center of the material placement surface 111 at the upper end of the column portion 113a. 113b. A receiving unit 130 is provided on the side of the arm 113 that faces the material placement surface 111 of the support column 113a. An imaging unit (imaging unit) 140 for photographing the document M is rotatably supported at the tip of the horizontal part 113 b of the arm 113.

  The receiving unit 130 receives the trajectory display signal output from the transmitting unit 40 of the light pen 1. The reception method of the reception unit 130 corresponds to the method of the transmission unit 40 of the light pen 1.

  As shown in FIG. 3, the imaging unit 140 includes a camera 141 that is a CCD camera capable of capturing a moving image, and an optical filter 142 that transmits only infrared light. The camera 141 is provided with a zoom function and an autofocus function, and the angle of view of the camera 141 is set so that the document M is accommodated therein by these functions. The optical filter 142 is provided so as to be detachable with respect to the photographing optical path of the camera 141. Since the imaging unit 140 is rotatably supported at the tip of the horizontal portion 113b of the arm 113 as described above, it is possible to photograph not only the document M on the material placement surface 111 but also the monitor 120, for example. It is.

  Further, inside the material mounting table 110, there is a control unit (control unit) 150 that executes image processing of a captured image of the document M captured by the imaging unit 140 when the pointing / drawing mode is set. Is provided. Specifically, the control unit 150 combines the pointer image with the captured image of the document M based on the position of the light emitting point in the captured image of the light emitting unit 30 of the light pen 1 when the pointing mode is set. Can do. On the other hand, when the receiving unit 130 receives the locus display signal from the transmitting unit 40 of the light pen 1 and is set to the drawing mode, the control unit 150 sets the light emitting point in the photographed image of the light emitting unit 30 of the light pen 1. Based on the trajectory, the trajectory image can be combined with the captured image of the document M.

  A photographed image of the document M that has been subjected to image processing by the control unit 150 is output to the monitor (display device) 120 and the liquid crystal projector 160. The captured image of the document M output to the monitor 120 is displayed there. The captured image of the original M output to the liquid crystal projector 160 is projected and displayed on a screen (display device, not shown).

(2) Operation | movement of embodiment Next, operation | movement at the time of applying the light pen 1 to the material presentation apparatus 100 is mainly demonstrated with reference to FIG.

  In the presentation, as shown in FIG. 2, the presenter places the document M on the material placement surface 111 on which the virtual screen S is generated, removes the optical filter 142 from the imaging optical path of the camera 141 of the imaging unit 140, A document 141 is photographed by the camera 141. A captured image of the document M is captured by the control unit 150 and processed there as a still image. In this case, processing of the captured image of the document M into a still image is executed by inputting a predetermined command to the control unit 150 and switching to the document shooting mode. Then, the still image of the document M is output to the monitor 120 and displayed there, and is also output to the liquid crystal projector 160, from which it is projected onto the screen and displayed.

  Subsequently, the presenter inputs a predetermined command to the control unit 150 to switch to the pointing / drawing mode as shown in FIG. 4 (step S11), and an optical filter in the imaging optical path of the camera 141 of the imaging unit 140 is displayed. 142 is inserted (step S12). Next, the presenter switches the manual switch 50 of the light pen 1 to the ON state and emits infrared light from the light emitting unit 30, without pressing the cap 22 of the pen tip 20 against the document M ( That is, the pen pressure type switch 60 is moved (without being turned on) (step S13). In step S11, when the mode is switched to the pointing / drawing mode, the control unit 150 is set to the pointing mode in the initial state.

  In such a pointing mode, the camera 141 captures a moving image of the emission point of the infrared light from the light emitting unit 30, and image data of the captured image is sequentially taken into the control unit 150. Then, the control unit 150 detects a light emitting point from the captured photographed image (step S14), calculates coordinates of the light emitting point on the virtual screen S based on the detected light emitting point (step S15), and a pointer mark. Is synthesized at a position corresponding to the calculated coordinates of the light emitting point in the photographed image of the document M (step S16). The photographed image of the original M with the point marks combined in this way is output and displayed on the monitor 120, and is output to the liquid crystal projector 160, and is projected and displayed on the screen therefrom.

  After the pointer mark is combined with the captured image of the document M, the control unit 150 checks whether or not the receiving unit 130 has received a trajectory display signal from the transmitting unit 40 of the light pen 1 (step S17). For example, when the presenter continues to move the cap 22 of the pen tip 20 to the document M without pressing the document M, the locus display signal is not transmitted from the transmitter 40 of the light pen 1, and thus the control is performed in step S17. The unit 150 does not detect the reception state of the trajectory display signal of the receiving unit 130, and therefore performs the operations after step S14.

  On the other hand, when the presenter presses the cap 22 of the pen tip 20 against the document M and turns the writing pressure switch 60 on, the locus display signal is transmitted from the transmitter 40 of the light pen 1. In S17, since the control unit 150 detects the reception state of the trajectory display signal of the reception unit 130, the control unit 150 is switched to the drawing mode.

  Here, in the present embodiment, the light emitting unit 30 of the light pen 1 can always be made to emit light regardless of the ON / OFF state of the writing pressure switch 60 (that is, the pointing mode / drawing mode). The pointer mark can always be displayed on the image of the original M on the monitor 120 or the screen. Thus, when the presenter switches from the pointing mode to the drawing mode, the presenter 30 causes the light emitting unit 30 to make a desired image of the document M while visually checking the pointer mark in the image of the document M displayed on the monitor 120 or the screen as described above. Then, the pen pressure type switch 60 is pressed against the document M, and a locus display signal is output from the transmitter 40.

  In such a drawing mode, when the presenter moves the light pen 1 on the document M by pressing the cap 22 of the pen tip 20 against the document M to turn the writing pressure switch 60 ON (see FIG. In step S <b> 18, the camera 141 captures a moving image of the emission point of the infrared light from the light emitting unit 30, and the image data of the captured image is sequentially taken into the control unit 150. Then, the control unit 150 detects the light emission point from the captured image (step S19), calculates the coordinates of the light emission point on the virtual screen S based on the detected light emission point (step S20), and the locus image. Is synthesized at a position corresponding to the calculated coordinates of the locus of the light emitting point in the photographed image of the document M (step S21). The photographed image of the original M, in which the trajectory images are combined in this manner, is output and displayed on the monitor 120, and is output to the liquid crystal projector 150, and is projected and displayed on the screen therefrom.

  After the trajectory image is combined with the captured image of the document M, the control unit 150 checks whether or not the receiving unit 130 has received a trajectory display signal from the transmission unit 40 of the light pen 1 (step S17). For example, when the presenter stops pressing the cap 22 of the pen tip 20 on the document M and moves the light pen 1 on the document M, the control unit 150 in step S17 causes the locus display signal of the reception unit 130 to be displayed. Since the reception state is not detected, the operations after step S14 are performed.

  On the other hand, when the presenter moves the light pen 1 on the document M while pressing the cap 22 of the pen tip 20 against the document M, the control unit 150 causes the reception unit 130 to track the trajectory in step S17. Since the reception state of the display signal is detected, the drawing mode is continued. In this case, after executing steps S19 and S20 in the same manner as described above, the control unit connects the locus of the light emitting point calculated this time to the locus of the light emitting point calculated immediately before in step S21. A trajectory image is synthesized at a position corresponding to the coordinates. As described above, while the control unit 150 detects the reception state of the locus display signal of the reception unit 130, the locus of the calculated light emitting point is repeatedly connected, and the locus image is synthesized at a position corresponding to the connected coordinates. To do. Subsequently, after step S21, the control unit 150 performs the same operation as described above.

  When the presenter inputs a predetermined command to switch from the pointing / drawing mode to another mode, the control unit 150 recognizes this in step S17, and the pointing / drawing mode ends (step S22).

  As described above, in the light pen 1 of the present embodiment, the locus display signal for displaying the locus of the light emitting unit 30 is selectively transmitted by operating the pen pressure switch 60 in a state where the light emitting unit 30 emits light. Since the output of the locus display signal from the transmitter 40 to a predetermined external device capable of displaying the locus of the light emitting point of the light emitting unit 30 is possible. The corresponding pointer mark can be displayed from the beginning on the image of the material displayed on the external device.

  When the light pen 1 according to the present embodiment is applied to the material presentation device 100 as an external device, the light emitting unit 30 of the light pen 1 can always be made to emit light as described above. A pointer mark corresponding to the light emitting point 110 can be always displayed on the image of the original M on the monitor 120 or the screen. Accordingly, when the drawing mode is performed by operating the pen pressure switch 60 of the light pen 1, the pointer mark is displayed on the image of the document M on the monitor 120 or the screen before starting to draw a character or the like. When starting to draw characters, the writing position can be recognized. Therefore, the presenter can start drawing a character or the like from a desired portion of the image of the original M.

  In particular, in the light pen 1 according to the present embodiment, the pen pressure type switch 60 can be used as a switch for selectively outputting the trajectory display signal from the transmission unit 40, and therefore, compared with the push button type switch. Since the button operation for outputting the locus display signal is not required, the locus of the light emitting point can be drawn with a simple operation, which is practical.

(3) Modifications Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the transmission unit 40 is used as the output unit of the trajectory display signal, but the present invention is not limited to this. For example, as shown in FIG. 5, a light emitting unit 31 that selectively emits light as a locus display signal according to the ON / OFF state of the writing pressure switch 60 can be used as the output unit. In this case, it is preferable to selectively emit light having a shape different from that of the light emitting unit 30 at the tip of the pen body 10. Further, the arrangement position of the light emitting unit 31 is not limited to the inside of the pen tip 20, and may be provided, for example, at the rear end of the pen body 10.

  Furthermore, the light emitting unit 30 can also function as an output unit. In this case, the light emitting unit 30 may selectively emit light having different blinking periods (for example, continuous emission light and blinking light) according to the ON / OFF state of the pen pressure switch 60, or mutually. You may selectively emit light of different intensity. In such an aspect, since it is not necessary to separately provide the transmitter 40 and the light emitting unit 31 as the output unit, a simple configuration can be achieved. In addition, when using the light emission part 30 and the light emission part 31 as an output part as mentioned above, the imaging part 140 of the material presentation apparatus 100 can be used as a detection means of the said light emission signal of the light emission parts 30 and 31. FIG.

  In addition, a push button switch 70 as shown in FIG. 6 can be provided as a manual switch. In this case, the locus display signal can be output from the output unit 40 by pressing the push button switch 70. In such an embodiment, since the push button type switch 70 can be operated more easily than the manual type switch 50, the locus of the light emitting point can be drawn with a simple operation, which is practical. In the above embodiment, the pen pressure type switch 60 is used for the light emitting unit and the push button type switch 70 is used for the output unit. However, the pen pressure type switch 60 is used for the output unit and the push button type switch 70 emits light. It may be used for parts.

  Instead of the manual switch 50 and the pen pressure switch 60, a known two-stage push pen pressure switch can be used. For example, as shown in FIG. 7, as the two-stage press pressure type switch, a two-stage press pressure type switch having a first switch part 81 and a second switch part 82 each provided with an elastic member such as a spring or an electrode member. A switch 80 can be used. The first switch unit 81 switches to the ON state when the pressing force to the cap 22 reaches the first pressing force set value, and the second switch unit 82 switches the pressing force to the cap 22 to the first pressing force set value. It is configured to switch to the ON state when the second pressing force setting value that is larger than is reached. In this case, the first switch unit 81 is used for the light emitting unit, the second switch unit 82 is used for the output unit, the pressing force to the pen tip 20 reaches the first pressing force setting value, and the first switch unit 81 is in the ON state. The light emitting unit 30 emits light, and when the pressing force to the pen tip 20 reaches the second pressing force set value and the second switch unit 82 is turned on, the locus display is performed from the output unit 40. It is configured to output a signal. In such an aspect, since the light emitting unit 30 can selectively emit light according to the pressing force to the pen tip 20, the light emitting unit 30 can emit light with a simple operation. In addition, since the light emitting unit 30 can emit light only when the pen tip 20 is pressed against the document M, power consumption can be suppressed.

  Further, as shown in FIG. 8, a known two-stage push / push button type switch can be used. For example, as shown in FIG. 8, the two-stage push-push button type switch includes a first switch part 91 and a second switch part 92 each having an elastic member such as a spring or an electrode member. A button-type switch 90 can be used. Such a two-stage push-push button type switch 90 is switched to the ON state when the push button 93 is pushed down the first distance in the first switch unit 91, and the push button 93 is turned on in the second switch unit 92. When the second distance is further pressed from the state where the first distance is pressed, the state is switched to the ON state. In this case, when the first switch unit 91 is used for the light emitting unit, the second switch unit 92 is used for the output unit, and the first switch unit 91 is turned on when the push button 93 is pressed for the first distance. When the light emitting unit 30 emits light and the push button 93 is pressed for the first distance and the second distance is further pressed to turn on the second switch unit 92, the output unit 40 displays the locus. It can be configured to output a signal. In such an embodiment, a simple configuration can be obtained as compared with the switch composed of the manual switch 50 and the pen pressure switch 60 and the two-stage press pen pressure switch 80.

It is an expansion perspective view of the light pen concerning one embodiment of the present invention. 1 is a perspective view illustrating a schematic configuration of a material presentation device to which a light pen according to an embodiment of the present invention is applied. It is a block diagram showing systematically the composition and function of the data presentation device concerning one embodiment of the present invention. It is a figure for demonstrating the recognition operation | movement of the light emission part of a light pen by the material presentation apparatus which concerns on one Embodiment of this invention. It is an expansion perspective view of the modification of the light pen which concerns on one Embodiment of this invention. It is an expansion perspective view of the other modification of the light pen which concerns on one Embodiment of this invention. It is an expansion perspective view of the other modification of the light pen which concerns on one Embodiment of this invention. It is an expansion perspective view of the other modification of the light pen which concerns on one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Light pen, 10 ... Pen main body, 20 ... Pen tip, 30, 31 ... Light emission part, 40 ... Transmission part (output part), 60 ... Pen pressure type switch (switch), 70 ... Push button type switch (switch), 80... Two-stage pressing pressure switch (switch), 81, 91... First switch section, 82, 92... Second switch section, 90.

Claims (10)

The pen body,
A light emitting unit that is provided at the tip of the pen body and emits light for indicating the position of the tip of the pen body;
An output unit for outputting a trajectory display signal for displaying the trajectory of the light emitting unit;
A light pen comprising a switch for selectively outputting the locus display signal from the output unit.   2. The light pen according to claim 1, wherein the switch is a writing pressure type switch that switches an ON / OFF state in accordance with a pressing force applied to a tip portion of the pen body.   The light pen according to claim 1, wherein the switch is a push button type switch.   The switch includes a first switch portion that switches to an ON state when the pressing force to the tip of the pen body reaches a first pressing force setting value, and the pressing force to the tip of the pen body is the first 2. The light pen according to claim 1, wherein the light pen is a two-stage pressing pressure switch having a second switch portion that is switched to an ON state when a second pressing force setting value larger than the pressing force setting value is reached. .   The switch includes a push button, a first switch unit that switches to an ON state when the push button is pushed down a first distance, and a second switch from a state where the push button is pushed down the first distance. The light pen according to claim 1, wherein the light pen is a two-stage push-push button type switch having a second switch unit that is switched to an ON state when the distance is pressed.   The light pen according to claim 1, wherein the output unit is a transmission unit that selectively transmits the locus display signal according to an ON / OFF state of the switch.   The light pen according to claim 1, wherein the output unit is a light emitting unit that selectively emits light according to an ON / OFF state of the switch.   The said output part is a light emission part which selectively emits the light of the shape different from the said light emission part of the front-end | tip part of the said pen main body according to the ON / OFF state of the said switch. The light pen according to any one of the above.   The light pen according to claim 1, wherein the output unit is the light emitting unit that selectively emits light having different blinking periods according to the ON / OFF state of the switch.   The light pen according to claim 1, wherein the output unit is the light emitting unit that selectively emits light having different intensities according to the ON / OFF state of the switch.

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