JP2015060573A - Projection system and pointer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the inconvenience due to the fact that a plurality of cursors are displayed on a projection image.SOLUTION: A control unit of a pointer determines whether or not flicker has been detected on the basis of an image photographed by an imaging unit (step S3). When flicker has been detected, the control unit turns off a pointer function unit and turns on a mouse function unit (step S5). Thus, a first cursor displayed on a display unit of a personal computer is projected by a projector and displayed on a screen; however, a second cursor is not displayed on the screen even when the apical surface of the pointer is directed toward the screen 100 because the pointer function unit has been turned off. With this configuration, it is possible to avoid the state where the first cursor and second cursor are concurrently displayed on the screen 100.

Description

  The present invention relates to a projection system and a pointer used in the projection system.

  Conventionally, a projection system in which a projector and a personal computer are wirelessly connected has been proposed (for example, see Patent Document 1 below). By using this system, an image displayed on a liquid crystal screen of a personal computer can be projected on the screen by a projector. Therefore, the presenter can make a presentation while switching and changing the projected image on the screen by operating the personal computer.

  In addition, presentation is also performed by using a laser pointer and displaying a laser cursor made of laser spot light on the screen (see, for example, Patent Document 2 below). Therefore, the presenter can smoothly explain while changing the projected image on the screen by an operation on the personal computer and pointing the main part of the projected image with the laser cursor.

JP 2000-222163 A Japanese Patent Laid-Open No. 2001-125738

  However, since the mouse cursor is normally displayed on the liquid crystal screen of the personal computer, when the image displayed on the liquid crystal screen is projected by the projector, the projected image is in a state where the mouse cursor is displayed. Therefore, if an explanation is made using a laser pointer in this state, a mouse cursor from a personal computer and a laser cursor consisting of spot light from the laser pointer are displayed together on the projection screen. For this reason, the instructor is confused when explaining, or the viewer receiving the explanation misunderstands.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a projection system and a pointer that eliminate problems caused by displaying a plurality of cursors on a projection image.

  In order to solve the above problems, in the projection system according to the present invention, a terminal device having a screen for displaying an image, and an image displayed on the screen from the terminal device is acquired and placed on a predetermined projection plane. A projection device for projecting, a first mode for displaying a first cursor on the screen, a first mode having a light source and irradiating light from the light source to display a second cursor at any external position. A projection system including: an irradiation apparatus capable of setting two modes, wherein the irradiation apparatus determines whether or not a position at which the second cursor is displayed is on the projection plane. And a control means for controlling to display the first cursor when the judgment means judges that the projection surface is on the projection plane.

  Moreover, in the irradiation apparatus according to the present invention, a terminal device having a screen for displaying an image, and a projection device for acquiring an image displayed on the screen from the terminal device and projecting the image on a predetermined projection surface An irradiation device used in a projection system including: a light emission source; a first mode for displaying a first cursor on the screen; and a second cursor that emits light from the light emission source and externally Setting means for setting a second mode to be displayed at an arbitrary position, determination means for determining whether or not the position at which the second cursor is displayed is on the projection plane, and the determination means And a control unit that controls to display the first cursor when it is determined to be on the projection plane.

  According to the present invention, it is possible to prevent a plurality of cursors from being displayed on the projected image, and as a result, it is possible to eliminate the inconvenience that the explainer is confused when explaining or the viewer receiving the explanation misunderstands. Can do.

1 is a perspective view showing a presentation system according to an embodiment of the present invention. It is a block diagram which shows the circuit structure of a projector. It is a block diagram which shows the circuit structure of a personal computer. It is a block diagram which shows the external appearance structure of a pointer. It is a block diagram which shows the circuit structure of a pointer. It is a flowchart which shows the process sequence of a pointer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a presentation system according to an embodiment of the present invention. This presentation system includes a projector 1 arranged in the presentation venue, a personal computer 5 wirelessly connected to the projector 1, and a pointer 8 wirelessly connected to the personal computer 5. In the presentation hall, a screen 100 on which an image is projected by the projector 1 and a whiteboard 200 on which items related to the presentation are written are arranged.
For example, Bluetooth (registered trademark) can be used as a proximity wireless communication means for connecting the projector 1, the personal computer 5, and the pointer 8.

  FIG. 2 is a block diagram showing a circuit configuration of the projector 1. The projector 1 includes a control unit 11, an input / output interface 12, an image conversion unit 13, a display encoder 14, a display driving unit 15, and the like. The image signals of various standards input from the input / output connector unit 16 are converted through the input / output interface 12 and the system bus 17 so as to be unified into image signals of a predetermined format suitable for display by the image conversion unit 13. Thereafter, it is sent to the display encoder 14. The image signal of the predetermined standard received from the personal computer 5 received by the wireless communication unit 28 is also unified into an image signal of a predetermined format suitable for display by the image conversion unit 13 via the wireless communication processing unit 29 and the system bus 17. Then, it is sent to the display encoder 14.

  The display encoder 14 develops and stores the transmitted image signal in the video RAM 18, generates a video signal from the stored contents of the video RAM 18, and outputs the video signal to the display driving unit 15.

  The display driving unit 15 to which the video signal is input from the display encoder 14 drives the display element 19 which is a spatial light modulation element (SOM) at an appropriate frame rate in accordance with the transmitted image signal. Then, the light beam emitted from the light source device 20 is incident on the display element 19 via the light source side optical system, thereby forming a light image with the reflected light of the display element 19 to form a projection lens system. The image is projected and displayed on the screen 100 via the screen 21. The movable lens group 21 of the projection side optical system is driven by a lens motor 22 for zoom adjustment and focus adjustment.

  The image compression / decompression unit 23 performs recording processing for compressing the luminance signal and the color difference signal in the image signal by processing such as ADTC and Huffman coding, and writing the data onto a memory card 24 that is a detachable recording medium. The image data recorded in the memory card 24 is read out, and individual image data constituting a series of moving images is decompressed in units of one frame and sent to the display encoder 14 via the image conversion unit 13 to be stored in the image data stored in the memory card 24. Based on this, it is possible to display a moving image or the like.

  The control unit 11 controls the operation of each circuit in the projector 1 and includes a CPU (Central Processing Unit) and its peripheral circuits, a ROM (Read Only Memory) 111, a RAM (Random Access Memory) 112, and the like. Has been. The ROM 111 stores programs and data such as a CPU and various settings in advance, and the RAM 112 is used as a work memory or the like. The key / indicator unit 25 includes a main key and an indicator provided in the main body case and the like, and an operation signal thereof is sent to the control unit 11.

  An audio processing unit 30 is connected to the control unit 11 via the system bus 17, and the audio processing unit 30 includes a sound source circuit such as a PCM sound source, and converts the audio data into analog in the projection mode and the reproduction mode. The loudspeaker 31 can be driven to emit loud sounds. The control unit 11 controls the light source control circuit 32 to perform time-division control on the red light source, the green light source, and the blue light source according to the image signal.

  FIG. 3 is a block diagram showing a configuration of the personal computer 5. As shown, the personal computer 5 includes a control unit 52, an HDD (Hard Disk) 53, a RAM 54, a sound processing unit 55, a graphic processing unit 56, a DVD / CD-ROM drive 57, which are connected to each other via a bus 51. A wireless communication processing unit 58 and an interface unit 59 are provided.

  The control unit 52 includes a CPU, a ROM, and the like, and sequentially executes programs stored in the RAM 54 based on a boot program stored in the ROM and a basic program such as an OS (Operating System) to perform various processes. In addition, the operation of each part in the main body of the personal computer 5 is controlled.

  The RAM 54 is used as a main memory, and stores programs and data transferred from the DVD / CD-ROM. The RAM 54 is also used as a work area during program execution. The sound processing unit 55 includes a speaker that performs processing for reproducing sound data in accordance with an instruction from the control unit 52, outputs the sound data as an audio signal, and reproduces the audio signal.

  The graphic processing unit 56 generates various image data in accordance with an instruction from the control unit 52, adds a predetermined synchronization signal to the generated image data, and outputs it to the display unit 61 as a video signal. The DVD / CD-ROM drive 57 drives a DVD / CD-ROM set in the personal computer 5 in accordance with an instruction from the control unit 52, and loads programs and data stored in the DVD / CD-ROM through the bus 51. To the RAM 54.

  A wireless communication unit 64 is connected to the wireless communication processing unit 58. The wireless signal from the pointer 8 is received by the wireless communication unit 64, demodulated by the wireless communication processing unit 58, and sent to the control unit 52. The wireless image signal to the projector 1 is transmitted from the control unit 52 to the wireless communication processing unit 58 and modulated, and then transmitted from the wireless communication unit 64.

  A keyboard 62 is connected to the interface unit 59. The interface unit 59 controls data exchange between the keyboard 62 and the control unit 52 or RAM 54. The HDD 53 stores various programs and various data. The display unit 61 includes a display screen including a liquid crystal panel or the like that displays an image corresponding to the video signal from the graphic processing unit 56.

  Therefore, the control unit 52 can process the video signal from the graphic processing unit 56 displayed on the display unit 61 and transmit the image signal to the projector 1 via the wireless communication processing unit 58 and the wireless communication unit 64. . Therefore, the projector 1 receives the image signal transmitted from the personal computer 5 by the wireless communication unit 28 and performs processing by each unit as described above, so that the same image as that displayed on the display unit 61 of the personal computer 5 is obtained. Can be projected onto the screen 100.

  FIG. 4 is a perspective view showing the external shape of the pointer 8. The pointer 8 has a housing 81 having a shape similar to a mouse. An upper end portion of the wheel 82 protrudes from the upper surface of the housing 81, and an imaging lens 83 and a laser diode 84 having an AF function are provided on the front end surface 95. Therefore, the imaging direction, which is the direction in which the image is taken by the imaging lens 83, and the irradiation direction, which is the direction of the laser emitted from the laser diode 84, are the same.

  FIG. 5 is a block diagram showing a circuit configuration of the pointer 8. As illustrated, the pointer 8 includes a control unit 85, an operation information input unit 86, an imaging unit 87, a switching unit 88, and the like. From the operation information input unit 86, all information related to the operation of the pointer 8, for example, power on / off, operation information of the wheel 82, movement information when the pointer 8 is moved on the desk like a mouse, left and right When click or drag is performed, click, drag information and the like are input, and the operation information is supplied to the control unit 85 via the bus line 89. The imaging unit 87 is disposed on the optical axis of the imaging lens 83 and has a CCD on which a subject image is formed, an A / D converter that processes a signal output from the CCD, a DSP, and the like, and an imaging signal (image Signal) is processed and supplied to the controller 85.

  Note that the CCD included in the imaging unit 87 operates at a frame rate (sampling frequency) at which an image projected by a light bundle emitted from the light source device 20 of the projector 1 can be detected as flicker.

  The switching unit 88 includes a circuit that switches between the pointer function unit 90 and the mouse function unit 91. The pointer function unit 90 is a circuit that drives the laser diode 84. The mouse function unit 91 generates commands for the personal computer 5 such as cursor display, scrolling, and clicking when the pointer 8 functions as a mouse based on the operation information input from the operation information input unit. These commands generated by the mouse function unit 91 are transmitted to the personal computer 5 via the wireless communication processing unit 82 and the wireless communication unit 93.

  The control unit 85 controls the operation of each circuit in the pointer 8 and includes a CPU and its peripheral circuits, a ROM 851, a RAM 852, and the like. The ROM 851 stores programs, data, and the like shown in the flowcharts described later in advance, and the RAM 852 is used as a work memory or the like.

  In the present embodiment having the above-described configuration, the presenter writes, for example, explanation items to be used on a plurality of screens to be projected on the whiteboard 200. At the time of presentation, materials stored in advance in the HDD 53 of the personal computer 5 are displayed on the display unit 61. Then, the image data in which the material is displayed on the display unit 61 of the personal computer 5 is transmitted to the projector 1 via the wireless communication unit 64. The projector 1 receives this data by the wireless communication unit 28, and is converted by the image conversion unit 13 to be unified into an image signal of a predetermined format suitable for display via the wireless communication processing unit 29 and the system bus 17. The display encoder 14 develops and stores the transmitted image signal in the video RAM 18, generates a video signal from the stored contents of the video RAM 18, and outputs the video signal to the display drive unit 15. The display drive unit 15, the display element 19 operates as described above. As a result, the same image as that displayed on the display unit 61 of the personal computer 5 is displayed on the screen 100.

  At this time, if the mouse function unit 91 is in the ON state by the switching unit 88 of the pointer 8, the first cursor is displayed on the display unit 61 of the personal computer 5. Accordingly, the image data including the first cursor is transmitted from the personal computer 5 to the projector 1 and projected, whereby the first cursor C1 is displayed on the screen 100 as shown in FIG. .

  On the other hand, the control unit 85 of the pointer 8 executes processing as shown in the flowchart of FIG. 6 according to the program stored in the ROM 851. If the power is turned on (step S1; YES), each unit is activated (step S2). Therefore, the imaging unit 87 is also activated by the processing in step S2, and the pointer 8 is in a state where it is possible to detect flicker on the projection image of the projector 1.

  Therefore, the control unit 85 of the pointer 8 determines whether or not the flicker has been detected based on the image captured by the imaging unit 87 (step S3). If the result of determination in step S3 is that flicker cannot be detected, the control unit 85 controls the switching unit 88 to turn on the pointer function unit 90 and turn off the mouse function unit 91 (step S4).

  That is, since the licker cannot be detected, it can be determined that the tip surface 95 of the pointer 8 is not at least in the direction of the screen 100. Considering that the presentation is currently being performed, it is assumed that the presenter points the pointer 8 in the direction of the whiteboard 200 and explains the items to be described on the whiteboard 200. Therefore, in this case, the pointer function unit 90 is maintained in the ON state (step S4).

  Thereby, the laser diode 84 is maintained in an operating state, and the second cursor C2 is projected onto the whiteboard 200 by the generated laser light as shown in FIG. Therefore, the presenter can advance the presentation while freely changing the position of the second cursor C2 on the whiteboard 200 by holding the pointer 8 and changing the direction of the front end surface 95.

  At this time, the control unit 85 turns off the mouse function unit 91 (step S4). Therefore, the first cursor C1 is erased from the display unit 61 and the screen 100 of the personal computer 5. Therefore, it is possible to prevent inconvenience that the viewer who receives the explanation misunderstands that the explanation on the screen 100 is being performed in spite of explaining the items described in the whiteboard 200. it can.

  After that, it is determined whether or not the power is turned off, and the processing from step S3 is repeated until the power is turned off.

  In this way, in the state where the presentation is progressing, when the tip surface 95 of the pointer 8 held by the presenter is directed toward the screen 100, the imaging lens 83 is also directed in the same direction. Therefore, flicker is detected by the imaging unit 87, and the determination in step S3 is YES. Therefore, the control unit 85 advances the process from step S3 to step S5, turns off the pointer function unit 90, and turns on the mouse function unit 91.

  At this time, the first cursor C <b> 1 displayed on the display unit of the personal computer 5 is projected and displayed on the screen 100 by the projector 1. However, since the pointer function unit 90 is turned off, the second cursor C2 is not displayed on the screen 100 even if the distal end surface 95 of the pointer 8 faces the screen 100.

  Therefore, the state where the first cursor C1 and the second cursor C2 are displayed together on the screen 100 can be avoided. For this reason, the first cursor C1 and the second cursor C2 are displayed on the screen 100, and the inconvenience that the explainer is confused when explaining or the viewer receiving the explanation misunderstands.

Although one embodiment of the present invention has been described above, modifications of the present embodiment are described below.
(1) In the embodiment, the second cursor C2 is not displayed to prevent the first and second cursors C1 and C2 from being displayed on the screen 100. May be displayed in a size smaller than the size previously displayed. In this way, the second cursor C2 becomes inconspicuous, and the misunderstanding of the viewer receiving the explanation can be reduced.

  (2) When flicker is detected, the second cursor C2 may be displayed in a color different from the image projected on the screen 100. In this way, the second cursor C2 can be clearly distinguished from the image without being obstructed by the second cursor C2.

  (3) When flicker is detected, the second cursor C2 may be displayed at a position that does not overlap with characters, figures, or graphs displayed on the screen 100 without erasing. In this way, the viewer receiving the explanation can see the characters, diagrams and graphs without being disturbed by the second cursor C2.

  (4) In step S4 of the present embodiment, the entire mouse function is stopped by turning off the mouse function unit 91. However, only the display function of the first cursor C1 is turned off, scrolling, Other functions such as clicking may be kept ON. In this way, the function of the mouse can be generated while avoiding the coexistence display of both cursors C1 and C2 on the screen 100.

  (5) In step S4 of the present embodiment, the pointer function unit 90 is simply turned on. However, a button is provided in the operation information input unit 86, and the read pointer function unit 90 is provided while the button is being operated. May be turned on. In this way, it is possible to prevent a situation in which laser light is accidentally applied to the viewer's eyes.

  (6) In the embodiment, it is determined whether or not the position where the second cursor C2 is displayed is on the screen 100 depending on whether or not flicker can be detected. However, the present invention is not limited to this. For example, it is determined whether or not the position where the second cursor C2 is displayed is on the screen 100 based on whether or not the pointer 8 faces the screen 100 using an angle sensor. You may make it judge whether the position where the 2nd cursor C2 is displayed is on the screen 100 by another means and method.

As mentioned above, although embodiment of this invention was described, these are suitably changeable if it is in the range with which the effect of this invention is acquired, Embodiment after change is also invention described in the claim, And the scope of the invention equivalent to that invention.
The invention described in the scope of the claims of the present application will be appended below.

[Claim 1]
A terminal device having a screen for displaying an image;
A projection device that acquires an image displayed on the screen from the terminal device and projects the image on a predetermined projection surface;
A first mode in which a first cursor is displayed on the screen and a second mode in which a light source is provided and light is emitted from the light source and the second cursor is displayed at an arbitrary external position are set. A projection system comprising:
The irradiation device includes:
Determining means for determining whether or not a position where the second cursor is displayed is on the projection plane;
And a control unit that controls to display the first cursor when the determination unit determines that the object is on the projection plane.

[Claim 2]
The determination means includes a detection means for detecting flicker associated with the projection of the projection device on the projection plane,
The projection system according to claim 1, wherein when the detection unit detects the flicker, the position where the second cursor is displayed is determined to be on the projection plane.

[Claim 3]
3. The control unit according to claim 1, wherein the control unit cancels the second mode when the determination unit determines that the position where the second cursor is displayed is on the projection plane. The projection system described.

[Claim 4]
The projection system according to claim 3, wherein the control unit cancels the second mode and sets the first mode.

[Claim 5]
5. The projection system according to claim 3, wherein the control unit releases the second mode and sets the first mode when the detection unit does not detect flicker in the region. 6. .

[Claim 6]
The control means causes the second cursor to be displayed in a smaller size when the position is determined to be on the projection plane by the determination section than when the position is determined not to be on the projection plane. The projection system according to claim 1.

[Claim 7]
When the determining unit determines that the position is on the projection plane, the control unit displays the first cursor in a different color according to the color of the image projected on the projection plane. The projection system according to claim 1, wherein:

[Claim 8]
The control unit displays the first cursor at a position avoiding an image projected on the projection plane when the determination unit determines that the position is on the projection plane. The projection system according to claim 1.

[Claim 9]
An irradiation apparatus used in a projection system including a terminal device including a screen for displaying an image, and a projection device that acquires an image displayed on the screen from the terminal device and projects the image on a predetermined projection plane. ,
A light source;
Setting means for setting a first mode for displaying a first cursor on the screen and a second mode for irradiating light from the light emitting source and displaying a second cursor at an arbitrary external position;
Determining means for determining whether or not a position where the second cursor is displayed is on the projection plane;
An irradiation apparatus comprising: a control unit that controls to display the first cursor when the determination unit determines that the object is on the projection plane.

[Claim 10]
The determination means includes a detection means for detecting flicker associated with the projection of the projection device on the projection plane,
The irradiation apparatus according to claim 9, wherein when the detection unit detects the flicker, it is determined that a position where the second cursor is displayed is on the projection plane.

DESCRIPTION OF SYMBOLS 1 Projector 5 Personal computer 8 Pointer 81 Housing 82 Wheel 82 Wireless communication processing part 83 Imaging lens 84 Laser diode 85 Control part 86 Operation information input part 87 Imaging part 88 Switching part 89 Bus line 90 Pointer function part 91 Mouse function part 93 Wireless communication part 95 Tip surface 100 Screen 111 ROM
112 RAM
200 whiteboard

Claims (16)

A terminal device having a screen for displaying an image;
A projection device that acquires an image displayed on the screen from the terminal device and projects the image on a predetermined projection surface;
A first mode in which a first cursor is displayed on the screen and a second mode in which a light source is provided and light is emitted from the light source and the second cursor is displayed at an arbitrary external position are set. A projection system comprising:
The irradiation device includes:
Determining means for determining whether or not a position where the second cursor is displayed is on the projection plane;
And a control unit that controls to display the first cursor when the determination unit determines that the object is on the projection plane. The determination means includes a detection means for detecting flicker associated with the projection of the projection device on the projection plane,
The projection system according to claim 1, wherein when the detection unit detects the flicker, the position where the second cursor is displayed is determined to be on the projection plane.   3. The control unit according to claim 1, wherein the control unit cancels the second mode when the determination unit determines that the position where the second cursor is displayed is on the projection plane. The projection system described.   The projection system according to claim 3, wherein the control unit cancels the second mode and sets the first mode.   5. The projection system according to claim 3, wherein the control unit releases the second mode and sets the first mode when the detection unit does not detect flicker in the region. 6. .   The control means causes the second cursor to be displayed in a smaller size when the position is determined to be on the projection plane by the determination section than when the position is determined not to be on the projection plane. The projection system according to claim 1.   When the determining unit determines that the position is on the projection plane, the control unit displays the first cursor in a different color according to the color of the image projected on the projection plane. The projection system according to claim 1, wherein:   The control unit displays the first cursor at a position avoiding an image projected on the projection plane when the determination unit determines that the position is on the projection plane. The projection system according to claim 1. An irradiation apparatus used in a projection system including a terminal device including a screen for displaying an image, and a projection device that acquires an image displayed on the screen from the terminal device and projects the image on a predetermined projection plane. ,
A light source;
Setting means for setting a first mode for displaying a first cursor on the screen and a second mode for irradiating light from the light emitting source and displaying a second cursor at an arbitrary external position;
Determining means for determining whether or not a position where the second cursor is displayed is on the projection plane;
An irradiation apparatus comprising: a control unit that controls to display the first cursor when the determination unit determines that the object is on the projection plane. The determination means includes a detection means for detecting flicker associated with the projection of the projection device on the projection plane,
The irradiation apparatus according to claim 9, wherein when the detection unit detects the flicker, it is determined that a position where the second cursor is displayed is on the projection plane.   The control unit controls the setting unit to release the second mode when the determination unit determines that the position where the second cursor is displayed is on the projection plane. The irradiation apparatus according to claim 9 or 10.   12. The irradiation apparatus according to claim 11, wherein the control unit cancels the second mode and sets the first mode.   13. The irradiation apparatus according to claim 11, wherein the control unit cancels the second mode and sets the first mode when the detection unit does not detect flicker in the part. .   The control means causes the second cursor to be displayed in a smaller size when the position is determined to be on the projection plane by the determination section than when the position is determined not to be on the projection plane. The irradiation apparatus according to claim 9.   When the determining unit determines that the position is on the projection plane, the control unit displays the first cursor in a different color according to the color of the image projected on the projection plane. The irradiation apparatus according to claim 9.   The control unit displays the first cursor at a position avoiding an image projected on the projection plane when the determination unit determines that the position is on the projection plane. The irradiation apparatus according to claim 9.

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