JP6690272B2 - Position detection system, self-luminous indicator, and unique information acquisition method - Google Patents

Description

  The present invention relates to a position detection system having a self-luminous indicator and a position detection device capable of detecting the indicated position of the indicator on the operation surface.

  Patent Document 1 discloses an interactive projector having a function as a position detection device. These interactive projectors project a projection screen on a screen, capture an image including a pointing element such as a light-emitting pen or finger with a camera, and detect the position of the indicator using the captured image. Is possible. That is, the interactive projector recognizes that a predetermined instruction such as drawing is input to the projection screen when the tip of the indicator is in contact with the screen, and redraws the projection screen according to the instruction. . Therefore, the user can input various instructions by using the projection screen as a user interface.

  In the interactive projector described in Patent Document 1, it is possible to identify a plurality of light emitting pens and detect the state of the pens (pen tip or side button press) by the light emitting sequence of the light emitting pens as the indicator.

JP, 2005-158887, A

  When a light-emitting pen is used as an indicator, there is a demand for the user to confirm specific information such as the version of software (control program) installed in the light-emitting pen and the remaining battery level of the light-emitting pen. is there.

The present invention has been made to solve at least a part of the problems described above, and can be realized as the following modes or application examples.
One form of the present invention is a position detection system including a self-luminous indicator and a position detection device that detects a pointed position indicated by the self-luminous indicator on an operation surface. Is a light emitting unit that emits infrared light, a storage unit that stores unique information including updatable update information regarding the self-luminous indicator, and a position detection device for detecting a position pointed by the self-luminous indicator. A first mode for causing the light emitting unit to emit the infrared light in a first light emitting sequence, and a second light emitting sequence for transmitting the unique information to the position detecting device, which is different from the first light emitting sequence. A second mode for causing the light emitting section to emit the infrared light, and an indicator control section for switching between the first mode and the second mode according to a pressed state of a button switch, Equipped with The position detection device captures the infrared light emitted by the self-emission indicator and the infrared light emitted by the self-emission indicator on the operation surface to generate a captured image. An image capturing section; a detecting section that detects the pointed position by the self-luminous indicator based on the captured image; an acquiring section that acquires the unique information according to the infrared light received by the light receiving section; When the light receiving unit receives the infrared light emitted in the first light emission sequence, the image pickup unit and the detection unit are controlled, and the pointing position by the self-luminous indicator is based on the picked-up image. And a device-side control unit that causes the acquisition unit to acquire the unique information when the light receiving unit receives the infrared light emitted in the second light emission sequence. .
According to this position detection system, the position detection device can acquire the unique information of the self-luminous indicator.

(1) According to one aspect of the present invention, there is provided a position detection system including a self-luminous indicator and a position detecting device that detects a pointed position indicated by the self-luminous indicator on the operation surface. . In this position detection system, the self-emission indicator emits light, a storage unit stores unique information including updatable update information about the self-emission indicator, and the first emission sequence emits light. A position indicator for detecting the position of the pointer, the indicator control unit having a first mode for causing the light emitting unit to emit light and a second mode for causing the light emitting unit to emit light in a second light emitting sequence different from the first light emitting sequence. The device includes a light receiving unit that receives the light emitted by the self-luminous indicator; an image capturing unit that captures the light emitted by the self-luminous indicator on the operation surface to generate a captured image; the captured image A detection unit that detects the pointed position by the self-luminous indicator based on the above; an acquisition unit that acquires the unique information according to the light received by the light receiving unit; Glows at When the received light is received, the image pickup unit and the detection unit are controlled to detect the indicated position by the self-emission indicator based on the captured image, and the light receiving unit causes the second light emission. A device-side control unit that causes the acquisition unit to acquire the unique information when the light emitted in a sequence is received.
According to this position detection system, the position detection device can acquire the unique information of the self-luminous indicator.

(2) The position detection device may further include an output unit that outputs the unique information acquired by the acquisition unit to the outside.
With this configuration, since the unique information of the self-luminous indicator acquired by the position detection device can be output to the outside, the user can easily know the unique information of the self-luminous indicator, which is convenient for the user. Is improved.

(3) In the position detection system, the position detection device may further include a projection unit that projects an image on the operation surface.
With this configuration, it is possible to project an appropriate image on the operation surface in accordance with the designated position of the self-luminous indicator.

(4) In the position detection system, the device-side control unit may cause the projection unit to project the unique information acquired by the acquisition unit.
With this configuration, since the unique information of the self-luminous indicator is projected on the operation surface, the user can easily confirm the unique information of the self-luminous indicator.

  The present invention can be implemented in various forms, for example, a position detecting device, a self-luminous indicator, a method for acquiring unique information of the self-luminous indicator, and a computer for realizing the functions of these methods or devices. It can be realized in various forms such as a program and a non-transitory storage medium recording the computer program.

The perspective view of the position detection system as one embodiment of the present invention. The front view of a position detection system. The side view of a position detection system. FIG. 3 is a block diagram showing internal configurations of a projector and a self-luminous indicator. 5 is a timing chart showing the light emission timing of the indicator signal light at the time of position detection. 7 is a timing chart showing the light emission timing of the indicator signal light for transmitting unique information. It is a figure which shows the projection image showing specific information. The block diagram which shows the internal structure of the position detection system as 2nd Embodiment.

A. First embodiment:
FIG. 1 is a perspective view of a position detection system 900 as an embodiment of the present invention. The position detection system 900 includes an interactive projector 100 (hereinafter, also simply referred to as “projector 100”) as a position detection device, a screen plate 920 that provides an operation surface, and a self-luminous indicator 70. The projector 100 includes a layered detection light irradiation unit 440 (light curtain unit). Note that in FIG. 1, for convenience of illustration, the layered detection light irradiation unit 440 is depicted as a separate body from the projector 100. The front surface of the screen plate 920 is used as a projection screen surface SS (projection Screen Surface). The projector 100 is fixed in front of and above the screen plate 920 by a support member 910. Although the projection screen surface SS is arranged vertically in FIG. 1, it is also possible to use this system 900 by arranging the projection screen surface SS horizontally.

  The projector 100 projects a projection screen PS (Projected Screen) on the projection screen surface SS. The projection screen PS usually includes an image drawn in the projector 100. When there is no image drawn in the projector 100, the projection screen PS is irradiated with light from the projector 100, and a white image is displayed. In the present specification, the “projection screen surface SS” means the surface of a member on which an image is projected. Further, the “projection screen PS” means an area of the image projected on the projection screen surface SS by the projector 100. Normally, the projection screen PS is projected on a part of the projection screen surface SS. The projection screen surface SS is also used as an operation surface for indicating the position by the pointer, and is therefore also referred to as “operation surface SS”.

  The self-luminous indicator 70 is a pen-shaped indicator having a tip 71 capable of emitting light, a shaft 72 held by a user, and a button switch 73 provided on the shaft 72. The tip portion 71 of the self-luminous indicator 70 emits infrared light, for example. The configuration and function of the self-luminous indicator 70 will be described later. In this system 900, one or more self-luminous indicators 70, as well as one or more non-luminous indicators 80 (such as non-emissive pens or fingers) can be used.

  2A is a front view of the position detection system 900, and FIG. 2B is a side view thereof. In this specification, the direction along the left and right of the operation surface SS is defined as the X direction, the direction along the top and bottom of the operation surface SS is defined as the Y direction, and the direction along the normal line of the operation surface SS is the Z direction. Is defined as Further, the upper left position of the operation surface SS in FIG. 2A is the origin (0, 0) of the coordinates (X, Y). Note that, for convenience, the X direction is also referred to as “horizontal direction”, the Y direction is also referred to as “vertical direction”, and the Z direction is also referred to as “front-back direction”. Further, of the Y directions (up and down directions), the direction in which the projection screen PS is present as viewed from the projector 100 is called the “down direction”. Note that, in FIG. 2B, for convenience of illustration, the range of the projection screen PS of the screen plate 920 is hatched.

  The projector 100 includes a projection lens 210 that projects the projection screen PS on the operation surface SS, a camera 310 that captures an area of the projection screen PS, and layered detection on the indicators (self-emission indicator 70 and non-emission indicator 80). It has a layered detection light irradiation unit 440 for irradiating the light LL (FIG. 2B). The layered detection light irradiation unit 440 has a layered (or curtain) shape over the entire surface of the projection screen PS in order to detect that the non-light emitting indicator 80 is in contact with the projection screen PS (that is, the operation surface SS). The irradiation unit emits the detection light LL. In FIG. 2A, the irradiation range of the layered detection light LL is indicated by the alternate long and short dash line and the angle θ. The layered detection light irradiation unit 440 is installed above the upper end of the screen plate 920, and emits the layered detection light LL downward in the range of the angle θ. In this embodiment, the angle θ is about 160 °. As a result, the detection light LL is emitted over the entire surface of the projection screen PS. The angle θ at which the layered detection light LL is emitted is not limited to this embodiment, and may be any angle at which the layered detection light LL is emitted over the entire surface of the projection screen PS. For example, infrared light can be used as the layered detection light LL. Here, the term "layered" or "curtain" means a thin spatial shape having a substantially uniform thickness. The distance between the operation surface SS and the layered detection light LL is set to a value in the range of 1 to 10 mm (preferably 1 to 5 mm), for example.

  The camera 310 has at least a first imaging function of receiving and imaging the layered detection light LL (infrared light) and light in a wavelength region including the wavelength of infrared light emitted by the self-luminous indicator 70. It is preferable that the camera 310 further has a second image capturing function of receiving and capturing light including visible light, and that these two image capturing functions can be switched. For example, the camera 310 has a near-infrared filter switching mechanism capable of arranging a near-infrared filter that blocks visible light and allows only near-infrared light to pass in front of the lens or retract from the front of the lens. It is preferable to provide each (not shown).

  The example of FIG. 2A shows the position detection system 900 operating in whiteboard mode. The whiteboard mode is a mode in which the user can arbitrarily draw on the projection screen PS using the self-luminous indicator 70 and the non-luminous indicator 80. A projection screen PS including a tool box TB is projected on the operation surface SS. This tool box TB selects a cancel button UDB for undoing processing, a pointer button PTB for selecting a mouse pointer, a pen button PEB for selecting a pen tool for drawing, and an eraser tool for deleting a drawn image. It includes an eraser button ERB and a forward / backward button FRB for moving the screen forward and backward. By clicking these buttons with the pointer, the user can perform processing according to the button or select a tool. The mouse pointer may be selected as the default tool immediately after the system 900 is activated. In the example of FIG. 2A, after the user selects the pen tool, the tip 71 of the self-luminous indicator 70 is moved in the projection screen PS in contact with the operation surface SS to draw a line in the projection screen PS. It shows how it is being done. Drawing of this line is performed by a projection image generation unit (described later) inside the projector 100.

  The position detection system 900 can also operate in modes other than the whiteboard mode. For example, the system 900 can also operate in a PC interactive mode in which an image of data transferred from a personal computer (not shown) via a communication line is displayed on the projection screen PS. In the PC interactive mode, for example, an image of data such as spreadsheet software is displayed, and various tools and icons displayed in the image can be used to input, create, and modify data. .

  FIG. 3 is a block diagram showing the internal configurations of the projector 100 and the self-luminous indicator 70. The projector 100 includes a control unit 700, a projection unit 200, a projection image generation unit 500, a position detection unit 600, an image pickup unit 300, a signal light transmission unit 430, a layered detection light irradiation unit 440, and a light reception unit 450. And have.

  The control unit 700 controls each unit inside the projector 100. Further, the control unit 700 determines the content of the instruction given on the projection screen PS in accordance with the indicated position of the indicator (the self-luminous indicator 70 or the non-luminous indicator 80) detected by the position detection unit 600. At the same time, the projection image generation unit 500 is instructed to create or change the projection image according to the content of the instruction. The control unit 700 also includes an acquisition unit 710 that acquires the unique information of the self-luminous indicator 70 according to the signal light from the self-luminous indicator 70 received by the light receiver 450. Based on the signal light from the self-luminous indicator 70 received by the light-receiving unit 450, the control unit 700 switches between the process of detecting the designated position by the indicator and the process of acquiring the unique information of the self-luminous indicator (described in detail later). ).

  The projection image generation unit 500 has a projection image memory 510 that stores a projection image, and has a function of generating a projection image projected on the operation surface SS by the projection unit 200. It is preferable that the projection image generation unit 500 further has a function as a keystone correction unit that corrects the trapezoidal distortion of the projection screen PS (FIG. 2A).

  The projection unit 200 has a function of projecting the projection image generated by the projection image generation unit 500 on the operation surface SS. The projection unit 200 has a light modulation unit 220 and a light source 230 in addition to the projection lens 210 described in FIG. 2B. The light modulator 220 forms the projection image light IML by modulating the light from the light source 230 according to the projection image data provided from the projection image memory 510. The projection image light IML is typically color image light including visible light of three colors of RGB, and is projected on the operation surface SS by the projection lens 210. As the light source 230, various light sources such as a light emitting diode and a laser diode can be adopted in addition to a light source lamp such as an ultra-high pressure mercury lamp. Further, a transmissive or reflective liquid crystal panel, a digital mirror device, or the like can be adopted as the light modulator 220, and a plurality of light modulators 220 may be provided for each color light.

  The signal light transmitter 430 has a function of periodically transmitting the device signal light ASL which is a near infrared light signal for synchronization. The signal light receiving unit 74 of the self-luminous indicator 70 receives the device signal light ASL, and the tip light emitting unit 77 synchronizes with the device signal light ASL and has a near-red light having a predetermined light emitting pattern (light emitting sequence). The indicator signal light PSL (described later) which is external light is emitted. In addition, the camera 310 of the imaging unit 300 executes imaging at a predetermined timing in synchronization with the device signal light ASL when detecting the pointing position by the pointers (the self-luminous pointer 70 and the non-lighting pointer 80).

  The light receiving section 450 receives the indicator signal light PSL emitted by the self-luminous indicator 70. The control unit 700 switches between the pointing position detection process and the unique information acquisition process of the self-luminous indicator 70 based on the light emission sequence of the indicator signal light PSL received by the light receiving unit 450. The acquisition unit 710 acquires the unique information of the self-luminous indicator 70 according to the light emission sequence of the indicator signal light PSL received by the light receiver 450.

  The imaging unit 300 has the camera 310 described with reference to FIGS. 2A and 2B. As described above, the camera 310 has a function of receiving and imaging the layered detection light LL and the light in the wavelength region including the wavelength of the infrared light emitted by the self-luminous indicator 70. In the example of FIG. 3, the layered detection light LL emitted by the layered detection light irradiator 440 is reflected by the indicator (the self-emission indicator 70 and the non-emission indicator 80), and the reflected detection light RDL is received by the camera 310. It is drawn that the image is captured and imaged. The camera 310 also receives and images the indicator signal light PSL that is near-infrared light emitted from the tip light emitting unit 77 of the self-luminous indicator 70. The imaging of the camera 310 is performed in the first period in which the layered detection light LL emitted from the layered detection light irradiation unit 440 is in the on state (light emitting state) and in the second period in which the layered detection light LL is off (non-light emitting state). It is executed in both the period and. The position detection unit 600 compares the images in these two types of periods, so that the individual indicators (bright spots) included in the images are either the self-luminous indicator 70 or the non-luminous indicator 80. It is possible to determine whether or not.

  The position detection unit 600 has a function of analyzing an image captured by the camera 310 and determining a pointed position by the pointer (the self-lighting pointer 70 or the non-lighting pointer 80). At this time, the position detection unit 600 uses the light emission pattern of the self-luminous indicator 70 to determine which of the self-luminous indicator 70 and the non-luminous indicator 80 is the individual indicator (bright spot) in the image. Is also determined.

  The self-luminous indicator 70 includes a signal light receiving unit 74, a control unit 75, a tip switch 76, a tip light emitting unit 77, a storage unit 78, and a power supply unit 79, in addition to the button switch 73. The signal light receiving unit 74 has a function of receiving the device signal light ASL emitted from the signal light transmitting unit 430 of the projector 100. The tip switch 76 is a switch that is turned on when the tip 71 of the self-luminous indicator 70 is pressed and turned off when the tip 71 is released. The tip switch 76 is normally in the OFF state, and when the tip portion 71 of the self-luminous indicator 70 contacts the operation surface SS, the tip switch 76 is turned on by the contact pressure. When the tip switch 76 is turned on, the control unit 75 synchronizes with the device signal light ASL and causes the tip light emitting unit 77 to perform a specific first light emission sequence (described later) indicating that the tip switch 76 is on. To emit the indicator signal light PSL having the first light emission pattern. The position detection unit 600 of the projector 100 detects the position pointed by the self-luminous indicator 70 when the self-luminous indicator 70 is in contact with the operation surface SS by analyzing the image captured by the camera 310. You can

  The power supply unit 79 includes batteries such as a primary battery, a secondary battery, and a photocell as a power supply, and supplies power to each component of the self-luminous indicator 70. The self-luminous indicator 70 may be provided with a power switch for turning on / off the power supply from the power supply unit 79, or may be operated by the button switch 73.

  The storage unit 78 stores the control program for the self-luminous indicator 70, and unique information 782 including the version of the program and the remaining battery level. The control unit 75 periodically checks the battery remaining amount of the power supply unit 79 via a battery remaining amount checker (not shown), and updates the battery remaining amount of the unique information 782. Further, when the control program of the self-luminous indicator 70 is updated, the control unit 75 updates the version of the control program of the unique information 782. The update of the control program is performed, for example, by the signal light receiving unit 74 of the self-emission indicator 70 receiving the device signal light ASL representing the update control program transmitted from the signal light transmitting unit 430 of the projector 100. The program version and the remaining battery level in this embodiment are also referred to as “update information”.

  The light emission pattern of the tip light emitting portion 77 is switched according to the pressed state of the button switch 73 of the self-luminous indicator 70. When the button switch 73 of the self-luminous indicator 70 is pressed for a long time (for example, 2 seconds or more), the control unit 75 displays the unique information 782 based on the unique information 782 stored in the storage unit 78. By causing the tip light emitting portion 77 to emit light in the light emitting sequence (described later), the indicator signal light PSL having the second light emitting pattern is emitted. The acquisition unit 710 of the projector 100 acquires the unique information 782 of the control unit 700 according to the indicator signal light PSL (second light emission sequence) received by the light receiving unit 450. When the button switch 73 of the self-luminous indicator 70 is not pressed, as described above, when the tip switch 76 is in the ON state, the tip light emitting section 77 emits light in the above-described first light emission sequence. The means for instructing the switching of the light emission sequence is not limited to this embodiment, and the button switch 73 may be intermittently pressed a plurality of times, or may be pressed once instead of long-pressed.

The specific examples of the five types of signal lights depicted in FIG. 3 are summarized below.
(1) Projected image light IML: Image light (visible light) projected on the operation surface SS by the projection lens 210 in order to project the projection screen PS on the operation surface SS.
(2) Layered detection light LL: Curtain-shaped near-infrared light emitted over the entire surface of the projection screen PS in order to detect the pointed position of the non-light-emitting pointer 80.
(3) Reflection detection light RDL: Near-infrared light emitted as the layered detection light LL is reflected by the indicators (the self-luminous indicator 70 and the non-luminous indicator 80) and is received by the camera 310 in the near red. It is outside light.
(4) Device signal light ASL: Near infrared light that is periodically emitted from the signal light transmission unit 430 of the projector 100 in order to synchronize the projector 100 and the self-luminous indicator 70.
(5) Pointer signal light PSL: Near-infrared light emitted from the tip light emitting portion 77 of the self-luminous indicator 70 at a timing synchronized with the device signal light ASL. The light emission sequence of the indicator signal light PSL is changed according to the on / off state of the button switch 73 of the self-luminous indicator 70. Further, it may have a unique light emission pattern for identifying the plurality of self-luminous indicators 70.

  The control unit 75 of the self-luminous indicator 70 according to the present embodiment is also referred to as a “pointer controller”. Further, the control unit 700 of the projector 100 is also referred to as “apparatus side control unit”.

  FIG. 4 is a timing chart showing the light emission timing of the indicator signal light PSL and the imaging timing at the time of position detection in the position detection system 900. The indicator signal light PSL shown in the lower part of FIG. 4 is emitted in the first emission sequence for detecting the indicated position. The projector 100 uses the first phase PH1 to the fourth phase PH4 as one cycle, distinguishes the non-light emitting indicator 80 and the self-luminous indicator 70, and specifies the position indicated by the indicator.

  The device signal light ASL is transmitted from the projector 100 at the beginning of the first phase PH1 (synchronization phase). The projector 100 performs imaging with the imaging unit 300 in a part of the imaging period of each of the first phase PH1 to the fourth phase PH4 in synchronization with the device signal light ASL. When the signal light receiver 74 of the self-luminous indicator 70 receives the device signal light ASL, the indicator signal light PSL is emitted in each of the first phase PH1 to the fourth phase PH4 in synchronization with the device signal light ASL. .

  FIG. 5 is a timing chart showing the emission timing of the indicator signal light PSL when transmitting the unique information of the self-luminous indicator 70. The indicator signal light PSL shown in FIG. 5 is emitted in the second emission sequence for transmitting unique information. The second light emission sequence is started by long-pressing the button switch 73 of the self-luminous indicator 70.

  As in the case of FIG. 4, when the device signal light ASL is transmitted from the projector 100 at the beginning of the first phase PH1 (synchronization phase), imaging is performed during the imaging period of the first phase. At this time, the indicator signal light PSL also emits light in the first phase PH1 in synchronization with the device signal light ASL. After that, the self-emission indicator 70 emits the indicator signal light PSL indicating a request for switching the self-emission indicator 70 to the ID (identification information) -added unique information communication mode, and then sequentially transmits various unique information. In this example, version information indicating the version of the control program of the self-luminous indicator 70 and the remaining battery level are sequentially transmitted as the unique information. The light receiving section 450 of the projector 100 receives the indicator signal light PSL according to the second light emission sequence and transmits it to the control section 700. The self-emission indicator 70 repeatedly emits light in the second light emission sequence while the button switch 73 is pressed. When the button switch 73 of the self-luminous indicator 70 is released, the tip light emitting unit 77 switches the light emitting sequence of the indicator signal light PSL from the second light emitting sequence to the first light emitting sequence.

  In the position detection system 900 of the present embodiment, the control unit 75 (FIG. 3) of the self-luminous indicator 70 has the tip light emitting unit in the first light emitting sequence according to whether the button switch 73 is pressed for a predetermined period. The first mode in which 77 emits light is switched to the second mode in which the tip light emitting unit 77 emits light in the second light emission sequence. The self-luminous indicator 70 emits the indicator signal light PSL in the first light emission sequence as a normal operation. That is, when the signal light receiving unit 74 receives the device signal light ASL when the button switch 73 of the self-luminous indicator 70 is not pressed for a predetermined period (for example, 2 seconds), the control unit 75 causes the tip switch to operate. While 76 is in the ON state, the front end light emitting section 77 is caused to emit the indicator signal light PSL in the first light emitting sequence (FIG. 4). When the button switch 73 is pressed for a predetermined period, the control unit 75 causes the tip light emitting unit 77 to emit the indicator signal light PSL in the second emission sequence after the signal light receiving unit 74 receives the device signal light ASL. (Fig. 5).

  On the other hand, the control unit 700 (FIG. 3) of the interactive projector 100 performs position detection processing (position detection mode) and unique information acquisition processing (unique information communication mode) according to the indicator signal light PSL received by the light receiving unit 450. Switch. The projector 100 performs position detection processing as a normal operation. That is, when the projector 100 is activated, the control unit 700 causes the signal light transmission unit 430 to emit the device signal light ASL and performs the position detection process (FIG. 4). When the light receiving unit 450 receives the indicator signal light PSL emitted in the second light emission sequence, the control unit 700 performs the unique information acquisition process (FIG. 5). Specifically, the control unit 700 emits the device signal light ASL, and when the request to switch to the unique information communication mode is received after the indicator signal light PSL is received in the first phase PH1, the imaging unit 300. The specific information 782 (version of the control program of the self-luminous indicator 70) is obtained according to the indicator signal light PSL received by the light receiving unit 450 in the acquisition unit 710 without performing the image capturing by the camera and the detection of the indicated position by the position detector 600. , Battery level). Then, the control unit 700 causes the projection image generation unit 500 to generate a projection image representing the unique information of the self-luminous indicator 70 from the unique information acquired by the acquisition unit 710 and the ID of the self-luminous indicator 70. , Projecting on the projection unit 200.

  When the light receiving unit 450 of the projector 100 receives the indicator signal light PSL indicating the battery remaining amount and then receives the request for switching to the IR communication mode again, the control unit 700 causes the unique information acquisition process to be performed again. That is, when the light receiving unit 450 repeatedly receives a request to switch to the unique information communication mode, the unique information acquisition process is repeatedly performed. If the light receiving unit 450 of the projector 100 does not receive the request to switch to the unique information communication mode for a predetermined period (for example, 1 second) after receiving the indicator signal light PSL indicating the remaining battery level, the control unit 700. Returns to the position detection process.

  FIG. 6 is a diagram showing a projected image representing the unique information. The projection screen PS projected on the screen plate 920 (FIG. 1) includes a unique information image UI indicating the unique information 782 of the self-luminous indicator 70.

  When the user long presses the button switch 73 of the self-luminous indicator 70, the unique information image UI is projected and displayed on the screen plate 920 while the button switch 73 is being pressed. Therefore, for example, when the self-luminous indicator 70 is out of order or when the user wants to know the battery level of the self-luminous indicator 70, the user can easily identify the self-luminous indicator 70 unique information. The unique information of the light emission indicator 70 can be known. Therefore, for example, the trouble of disassembling the self-luminous indicator 70 and accessing the control unit 75 to obtain the unique information can be reduced, and the convenience for the user is improved. Note that, after the button switch 73 is pressed for a long time, the unique information image UI may be projected and displayed on the screen plate 920 for a predetermined period regardless of the state of the button switch 73.

B. Second embodiment:
FIG. 7 is a block diagram showing the internal configuration of the position detection system 900A according to the second embodiment. In FIG. 7, the screen plate 920 (FIG. 1) is not shown. The difference between the position detection system 900A of the present embodiment and the first embodiment is that the computer 90 is provided, and the projector 100A is provided with a USB I / F (interface) 800. Other configurations are the same as those of the first embodiment. It is the same as the form.

  The computer 90 includes a control unit 92, a display unit 94, and a USB I / F (interface) 96. The USB I / F 96 of the computer 90 and the USB I / F 800 of the projector 100A are connected via a USB cable. The control unit 92 of the computer 90 acquires the unique information 782 of the self-luminous indicator 70 from the acquisition unit 710 of the projector 100A via the USB I / F 96 and the USB I / F 800 to generate an image representing the unique information 782, and the display unit 94 is displayed. An image similar to the projection image shown in FIG. 6 is displayed on the display unit 94. As the display unit 94, for example, a liquid crystal panel, an organic EL panel, a plasma display panel (PDP) or the like can be applied. The USB I / F 800 in this embodiment is also called an “output unit”.

  According to the position detection system 900A of the second embodiment, the unique information of the self-luminous indicator 70 acquired by the projector 100A is displayed on the display unit 94 of the computer 90. Therefore, the user can easily know the unique information of the self-luminous indicator 70 via the display unit 94 of the computer 90.

C. Modification:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention, and the following modifications are possible, for example.

・ Modification 1:
In the above embodiment, the interactive projector is described as an example of the position detecting device, but the present invention can be applied to other position detecting devices other than the interactive projector. For example, the present invention can be applied to a digitizer or a tablet that uses a self-luminous indicator to indicate a position on the operation surface. The unique information of the self-luminous indicator may be displayed on the display screen of the tablet, or may be displayed on the display screen of the digitizer or other device connected to the tablet.

-Modification 2:
In the above embodiment, the position detection system 900 capable of detecting the pointing positions of both the self-luminous indicator 70 and the non-luminous indicator 80 has been exemplified, but at least the position indicated by the self-luminous indicator 70 can be detected. .

-Modification 3:
In the above embodiment, the version of the control program for controlling the self-luminous indicator 70 and the battery level are illustrated as the unique information, but other information may be used as long as the information can be updated.

-Modification 4:
In the above-described embodiment, while the button switch 73 is being pressed, the tip end light emitting section 77 emits the indicator signal light PSL having the second light emission sequence, the button switch 73 is not pressed down, and the tip switch 76 is An example has been shown in which the indicator light signal PSL having the first light emission sequence is emitted from the tip light emitting section 77 in the ON state, but the button switch 73 is not pressed down and the tip switch 76 is turned off. In the state, the tip light emitting unit 77 may emit the indicator signal light PSL having a third light emitting sequence different from the first and second light emitting sequences. By doing so, even when the self-luminous indicator 70 is not in contact with the operation surface SS, the self-luminous indicator 70 emits the indicator signal light PSL, so that the projector 100 is in contact with the operation surface SS. The position of the non-self-luminous indicator 70 can be detected.

  Although the embodiments of the present invention have been described above based on some embodiments, the embodiments of the present invention described above are for facilitating the understanding of the present invention and limit the present invention. Not a thing. The present invention can be modified and improved without departing from the spirit and scope of the claims, and it goes without saying that the present invention includes equivalents thereof.

  70 ... Self-luminous indicator, 71 ... Tip part, 72 ... Shaft part, 73 ... Button switch, 74 ... Signal light receiving part, 75 ... Control part, 76 ... Tip switch, 77 ... Tip light emitting part, 78 ... Storage part, 79 ... Power supply section, 80 ... Non-light emitting indicator, 90 ... Computer, 92 ... Control section, 94 ... Display section, 100, 100A ... Projector (interactive projector), 200 ... Projection section, 210 ... Projection lens, 220 ... Optical modulation Part, 230 ... Light source, 300 ... Imaging part, 310 ... Camera, 430 ... Signal light transmitting part, 440 ... Layered detection light irradiating part, 450 ... Light receiving part, 500 ... Projection image generating part, 510 ... Projection image memory, 600 ... Position detection unit, 700 ... Control unit, 710 ... Acquisition unit, 782 ... Unique information, 900, 900A ... Position detection system, 910 ... Support member, 920 ... Screen plate, SL ... Device signal light, ERB ... Eraser button, FRB ... Front / rear button, 800 ... USB I / F, 96 ... USB I / F, IML ... Projection image light, LL ... Layered detection light, PEB ... Pen button, PS ... Projection Screen, PSL ... Pointer signal light, PTB ... Pointer button, RDL ... Reflection detection light, SS ... Operation surface (projection screen surface), TB ... Tool box, UDB ... Cancel button, UI ... Unique information image

Claims (6)

A position detection system having a self-luminous indicator and a position detection device for detecting a designated position designated by the self-luminous indicator on an operation surface,
The self-luminous indicator is
A light emitting unit that emits infrared light,
A storage unit that stores unique information including updatable update information regarding the self-luminous indicator,
A first mode for causing the light emitting unit to emit the infrared light in a first light emitting sequence for detecting a position pointed by the self-luminous pointer by a position detection device, and the unique mode unlike the first light emitting sequence. A second mode in which the light emitting unit emits the infrared light in a second light emission sequence for transmitting information to the position detection device, and the first mode is set according to a pressed state of a button switch. An indicator control unit for switching between the second mode and the second mode,
Equipped with
The position detection device,
A light receiving unit for receiving the infrared light emitted by the self-luminous indicator,
An imaging unit that captures the infrared light emitted by the self-luminous indicator on the operation surface to generate a captured image,
A detection unit that detects the indicated position by the self-luminous indicator based on the captured image;
An acquisition unit that acquires the unique information according to the infrared light received by the light receiving unit,
When the light receiving unit receives the infrared light emitted in the first light emission sequence, the image capturing unit and the detection unit are controlled, and the instruction by the self-emission indicator is based on the captured image. A device-side control unit that causes the acquisition unit to acquire the unique information when the position is detected and the light receiving unit receives the infrared light emitted in the second light emission sequence,
A position detection system comprising: The position detection system according to claim 1,
The position detection device further includes an output unit that outputs the unique information acquired by the acquisition unit to the outside. The position detection system according to claim 1 or 2, wherein
The position detection system further includes a projection unit that projects an image on the operation surface. The position detection system according to claim 3, wherein
The position detection system wherein the device-side control unit causes the projection unit to project the unique information acquired by the acquisition unit. A self-luminous indicator for indicating a position on the operation surface,
A light emitting unit that emits infrared light,
A storage unit that stores unique information including updatable update information regarding the self-luminous indicator,
A first mode for causing the light emitting unit to emit the infrared light in a first light emitting sequence for detecting a position pointed by the self-luminous pointer by a position detection device, and the unique mode unlike the first light emitting sequence. A second mode in which the light emitting unit emits the infrared light in a second light emission sequence for transmitting information to the position detection device, and the first mode is set according to a pressed state of a button switch. An indicator control unit for switching between the second mode and the second mode,
And a self-luminous indicator. In a position detection system having a self-luminous indicator and a position detecting device for detecting a pointed position indicated by the self-luminous indicator on an operation surface, a unique position including updateable update information regarding the self-luminous indicator. How to get the information,
The self-luminous indicator is
A first mode in which infrared light is emitted in a first light emission sequence for detecting the indicated position by the position detection device, and for transmitting the unique information to the position detection device, unlike the first light emission sequence. A second mode of emitting the infrared light in a second emission sequence of, and emitting the infrared light by switching between a second mode and a second mode in accordance with the pressed state of a button switch,
The position detection device,
When the self-luminous indicator receives the infrared light emitted in the first mode, the infrared light emitted by the self-luminous indicator on the operation surface is imaged to generate a captured image, Detecting the pointed position by the self-luminous indicator based on the captured image,
Acquiring the unique information when the self-luminous indicator receives the infrared light emitted in the second mode,
A method for obtaining unique information of a self-luminous indicator, comprising:

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