JP2013057822A - Image projection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately control various operation timings of an image projected by a portable projection device.SOLUTION: An image projection system includes a flashlight projector 1 including a light source part emitting illumination light, a receiving part receiving a control signal radio-transmitted and indicating projection of the image, and a projection part forming an optical image based on the control signal received by the receiving part by using the light emitted from the light source and projecting an optical image; and a PC 4 including a plurality of optical sensors 2a, 2a, ... set in an image projection position by the flashlight projector 1 and detecting the irradiation of the light from the flashlight projector 1, and a transmission part radio-transmitting the control signal indicating the projection of the image to the flashlight projector 1, according to the detection result of the optical sensors 2a, 2a, ....

Description

  The present invention relates to an image projection system using a portable projection device.

  In a portable image projection apparatus, it is considered that a posture change such as a rotation hardly occurs even when an operation member is operated while being held with one hand. (For example, Patent Document 1)

JP 2008-046216 A

  If a small projector device as described in the above-mentioned patent document can be realized, unlike a conventional stationary projector device, it can be assumed that the user projects a light image on the screen while holding it in his hand.

  When such a small projector device is applied to, for example, an amusement park attraction, and the use of switching images depending on the location and position of projection is considered, there are an unspecified number of users of the attraction, and individual use There is a problem that it is difficult to accurately control the timing for switching images because the holding method and the moving speed in the irradiation direction are different for each person.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an image projection system capable of accurately controlling various operation timings of an image projected by a portable projection device. There is to do.

  One embodiment of the present invention is based on a light source unit that emits illumination light, a reception unit that receives a control signal instructing projection of an image, and a control signal received by the reception unit using light emitted from the light source unit. A projection apparatus including a projection unit that forms and projects a light image, a plurality of optical sensors that are installed at an image projection position by the projection apparatus and that detect irradiation of light from the projection apparatus, and detection of the optical sensor And a control unit including a transmission unit that wirelessly transmits the control signal instructing the projection apparatus to project an image according to the result.

  According to the present invention, it is possible to accurately control various operation timings of an image projected by a portable projector.

1 is a diagram illustrating a configuration example of an entire system according to an embodiment of the present invention. The block diagram which shows the functional circuit structure of the flashlight type projector which concerns on the same embodiment. The flowchart which shows the processing content by the side of PC which concerns on the same embodiment. The flowchart which shows the processing content by the flashlight type projector side which concerns on the same embodiment. 6 is a timing chart showing a projection operation on the flashlight projector side according to the embodiment.

  Hereinafter, an embodiment in which the present invention is applied to an amusement park attraction facility, specifically, a projection system for “haunted house” will be described with reference to the drawings.

  FIG. 1 shows an overview of the system. A user of the attraction (hereinafter referred to as “user”) possesses the flashlight projector 1 and moves along the passage AR in the attraction in a certain direction as indicated by an arrow A in the drawing.

  Since the passage AR where the user moves is a dim environment where the illumination is extremely reduced, the user moves while using the light emitted from the flashlight projector 1 as the only illumination means. FIG. 1 shows one flashlight type projector 1 among a plurality of prepared ones.

  The flashlight projector 1 is configured to be recognized as a normal flashlight by the user from its cylindrical appearance, and includes a power switch 1a as in a general flashlight.

  A plurality of screens 2, 2,... Are laid on the wall surface, ceiling, etc. in the passage AR where the user moves within the attraction. In order to generate the black light effect described later, each of the screens 2, 2,... Is coated with a fluorescent material such as europium-doped strontium borohydride or lead-doped barium silicide. Shall.

  In addition, optical sensors 2a, 2a,... Are embedded at the upstream end portions of the screens 2, 2,..., Respectively, so that a specific wavelength band emitted by the flashlight projector 1, for example, green light is selectively used. Receive light.

  Here, the light sensors 2a, 2a,... Selectively receive green light emitted from the flashlight projector 1 as described in detail later. Of these, green light is caused by the highest luminance level. Therefore, it is assumed that a color filter that selectively transmits only green light is provided on the surface of each of the optical sensors 2a, 2a,.

  The received light signals of the optical sensors 2a, 2a,... Are collected by the repeater 3, digitized by the repeater 3, and then a personal computer (hereinafter referred to as “PC”) as a control device via a serial cable or the like. Sent to 4.

  The PC 4 is installed in a control room CR for managing this attraction facility, and a flashlight partially superimposed on the light reception signals of the optical sensors 2a, 2a,... As will be described in detail later. Control for recognizing the terminal ID information of the projector 1 and projecting an image corresponding to the position of the optical sensor 2a to the recognized flashlight projector 1, that is, among the optical sensors 2a, 2a,. Control for projecting an image corresponding to the optical sensor 2a that has detected the irradiation is executed.

  Note that the hardware configuration of the PC 4 is very general, and illustration and description thereof are omitted. The PC 4 includes a storage area (for example, an HDD (hard disk device)) that stores still image and moving image data to be transmitted to the flashlight projector 1. The PC 4 has a wireless LAN function conforming to, for example, the IEEE 802.11a / b / g / n standard, and a flashlight projector 1 via a repeater (not shown) provided in the passage AR as necessary. As shown by the symbol W in the figure, the image data of still images and moving images stored in the storage area is transmitted from the PC 4 to the flashlight projector 1 and included in the control signal for projection. It is possible to make it.

  Next, a schematic functional configuration of the flashlight projector 1 adopting the DLP (registered trademark) system will be described with reference to FIG.

  In the figure, reference numeral 11 denotes a wireless LAN antenna 11. A control signal including image data sent from the PC 4 side is received by the wireless LAN antenna 11 and demodulated by the wireless LAN interface 12. Image data demodulated by the wireless LAN interface 12 is input to the image driver 13 via the system bus SB.

  The image driving unit 13 unifies the input image data into a format suitable for projection, writes the image data appropriately in a built-in display buffer memory, reads the written image signal, sets the frame rate, For example, the micromirror element 14 is displayed and driven by faster time-division driving, which is obtained by multiplying 60 [frames / second] by the number of color component divisions and the number of display gradations.

  The micromirror element 14 performs a display operation by individually turning on / off each inclination angle of a plurality of, for example, micromirrors having a diameter direction of 1280 pixels arranged in an array so as to form a circular shape as a whole. Thus, a circular light image is formed by the reflected light.

  On the other hand, R (red), G (green), B (blue), and UV (ultraviolet) light is emitted cyclically from the light source unit 15 in a time division manner. The light from the light source unit 15 is totally reflected by the mirror 16 and applied to the micromirror element 14.

  Then, an optical image is formed by the reflected light from the micromirror element 14, and the formed optical image is projected and displayed on one of the screens 2, 2,. .

The light source unit 15 includes an LD (hereinafter referred to as “G-LD”) 18 that emits green (G) light,
Light emitting diode (hereinafter referred to as “R-LED”) 19 that emits red (R) light, LD (hereinafter referred to as “B-LD”) 20 that emits blue (B) light, and long wavelength UV (ultraviolet) light A light emitting diode (hereinafter referred to as “UV-LED”) 21 that emits light.

  The green light emitted from the G-LD 18 is transmitted through the dichroic mirror 22 and then sent to the mirror 16.

  The red light emitted from the R-LED 19 is reflected by the dichroic mirror 23, then reflected by the dichroic mirror 22 and sent to the mirror 16.

The blue light emitted from the B-LD 20 is reflected by the dichroic mirror 24, then passes through the dichroic mirror 23, is then reflected by the dichroic mirror 22, and is sent to the mirror 16.
The ultraviolet light emitted from the UV-LED 21, for example, ultraviolet light having a peak wavelength of 365 [nm], is reflected by the mirror 25, continuously passes through the dichroic mirrors 24 and 23, and is further reflected by the dichroic mirror 22. It is sent to the mirror 16. In addition, the ultraviolet-ray in this embodiment means the light whose peak wavelength is 380 [nm] or less.

  The dichroic mirror 22 transmits green light while reflecting red light, blue light, and ultraviolet light. The dichroic mirror 23 reflects red light and transmits blue light and ultraviolet light. The dichroic mirror 24 reflects blue light and transmits ultraviolet light.

  The light source drive unit 26 controls the light emission timing of each of the G-LD 18, R-LED 19, B-LD 20, and UV-LED 21 of the light source unit 15, the waveform of the drive signal, and the like. The light source drive unit 26 emits light from the G-LD 18, R-LED 19, B-LD 20, and UV-LED 21 in accordance with a timing signal synchronized with the image signal supplied from the image drive unit 13 and control of the CPU 27 described later. Control the behavior. In this embodiment, the G-LD 18, R-LED 19, and B-LD 20 are used. However, other configurations such as making all red, green, and blue light sources LED or LD may be used.

The CPU 27 controls all the operations of the above circuits. The CPU 27 is directly connected to the main memory 28 and the program memory 29. The main memory 28 is composed of, for example, an SRAM and functions as a work memory for the CPU 27. The program memory 29 is composed of an electrically rewritable non-volatile memory such as a flash ROM, and stores an operation program executed by the CPU 27, various fixed data including terminal ID information of the own device, and the like.
The CPU 27 controls the flashlight projector 1 by reading out the operation program, standard data, and the like stored in the program memory 29, developing and storing them in the main memory 28, and executing the program. And control.

  The CPU 27 performs various power-on projection operations in response to key operation signals from the operation unit 30. The operation unit 30 includes the power switch 1a.

The CPU 27 is further connected to the triaxial acceleration sensor 31 via the system bus SB.
The triaxial acceleration sensor 31 is constituted by, for example, a piezoresistive semiconductor triaxial acceleration sensor, and detects the tilt and posture when the flashlight projector 1 is carried.

Next, the operation of the above embodiment will be described.
FIG. 3 shows the basic processing contents on the PC 4 side that controls the entire server apparatus in the network. The CPU of the PC 4 initially scans the outputs from the all-light sensors 2a, 2a,... Sequentially according to the output from the repeater 3 (step S101), and the flashlight projector 1 that is a mobile terminal that is an image projection target. Whether or not there is at least one is determined based on whether or not the irradiation of light from the flashlight projector 1 is detected and the terminal ID information superimposed in the detected signal is extracted and recognized (step) S102).

  If it is determined that there is no light irradiation of the flashlight type projector 1 that can recognize the terminal ID information, the process returns to step S101 again.

  If it is detected in step S102 that light emitted by any of the flashlight projectors 1 is detected and the terminal ID information can be recognized, the CPU of the PC 4 can recognize at least one terminal ID. One control target is selected from the flashlight projector 1 (step S103).

  Then, the image data uniquely corresponding to the image data is selected from the image data according to the position of the optical sensor 2a that has detected the light irradiation (step S104).

  The CPU of the PC 4 adds the terminal ID information of the flashlight type projector 1 to the selected image data as a control signal and transmits it via the wireless LAN (step S105).

  Thereafter, even if the CPU of the PC 4 finishes the image transmission response depending on whether there is another flashlight projector 1 as a mobile terminal detected by the output of the optical sensors 2a, 2a,. It is determined whether it is acceptable (step S106).

  If it is determined that there is still another flashlight projector 1 that is a detected mobile terminal, the processing from step S103 is repeated.

  When the same processing is completed for all the flashlight projectors 1 that are detected mobile terminals, the response is terminated in step S105, and the processing from step S101 is performed to execute the next scan. Return.

Next, processing contents on the flashlight projector 1 side will be described.
FIG. 4 shows the basic processing contents executed by the CPU 27 once the power switch 1a constituting the operation unit 30 of the flashlight projector 1 is once operated by the user. Initially, the terminal ID information assigned to the own device is read from the program memory 29, and the terminal ID information is superimposed on a part of the program memory 29. As a result, projection is performed to emit illumination light whose entire surface is white. The operation is executed (step C101).

  The projection operation timing at this time will be described in part of FIG.

  As shown in FIG. 5A, it is assumed that one color image frame is composed of a total of four fields of an R field, a G field, a B field, and a UV field. In this case, as shown in FIGS. 5B to 5E, the light source driving unit 26 controls the R-LED 19, G-LD 18, B-LD 20, and UV-LED 21 in synchronization with each field under the control of the CPU 27. Light emission is driven in time division.

  However, only during a certain period DS at the beginning of the G field, which is the second field, the light source driving unit 26 changes the G-LD 18 over time based on the terminal ID information of the own device read from the program memory 29. ) Is driven to emit light in order to encode and modulate the information.

  In this case, the encoding method and the modulation method executed by the light source driving unit 26 are arbitrary, but preferably a 4-value PPM (Pulse-position) employing a subcarrier having a frequency of 28.8 [kHz]. (modulation) is adopted.

  Naturally, at this type of communication speed, it is impossible to visually recognize the blinking pattern of the modulated light, and the user does not perceive that any signal is transmitted from the flashlight projector 1.

  Details of the information transmission technique in this type of visible light communication system are described in, for example, Japanese Patent Application Laid-Open No. 2003-179556, and the description thereof will be omitted. However, the optical sensors 2a, 2a,. It is possible to detect terminal ID information assigned to each flashlight projector 1 by demodulating the information that changes in luminance (blinks) with time from the output.

  In synchronism with the light emission timing of each transmission of the light source unit 15 as shown in FIG. 5F, all the R, G, and B fields except for the UV field constitute the entire surface of the micromirror element 14. Both the pixel mirrors are always kept on during the field period, and the entire incident light is emitted from the projection lens unit 17 as reflected light.

  Therefore, in this state, the flashlight type projector 1 functions as a flashlight that simply emits white light over the entire surface while being a projector, and the external shape can be recognized by the user as a flashlight.

  At this time, as shown in FIG. 5 (E), the micromirror element 14 is turned off only in the UV field so that the UV light is not emitted from the projection lens unit 17 and applied to the screen 2. The fluorescent material does not emit fluorescence due to the black light effect.

  While maintaining the function as a flashlight, whether or not a control signal added with image data addressed to the own device is received from the PC 4 via the wireless LAN antenna 11 is added to, for example, the head of the control signal. The terminal ID information is determined based on whether or not the terminal ID information is the terminal ID information of the own device (step C102).

  If it is determined that the control signal including the image data addressed to the own device is not received, the process returns to step C101 to continue the operation as a flashlight.

  Thereafter, when light including terminal ID information is irradiated to the optical sensor 2a of any screen 2 in the passage, a control signal including image data addressed to the own device is transmitted from the PC 4, so that the above step C102 is performed. Judge it.

  At this time, the CPU 27 uses the three-axis acceleration sensor 31 to acquire the direction of camera shake currently occurring in the flashlight projector 1 and the posture angle of the flashlight projector 1 in the three-dimensional space (step) C103).

  Based on the acquired output of the three-axis acceleration sensor 31, the CPU 27 projects the light image formed by the micromirror element 14 in a direction to correct the camera shake while maintaining the correct vertical direction on the screen 2. The projection operation is executed while shifting the image display position (step C104).

At this time, the micromirror element 14 displays a color image corresponding to each field in each of R, G, B, and UV fields as shown in FIG. An image in which the possessed angle, camera shake, etc. are corrected is projected, and the user is faced with a situation where an image suddenly appears at the irradiation position with the flashlight.
In particular, by projecting an image in consideration of UV light as a black light, a visual effect that cannot be expressed by a normal color image can be obtained, and the expressive power for the user can be enhanced.

  During this image projection, the terminal ID information transmission operation in the initial period DS of the G field may be temporarily stopped.

  Further, the CPU 27 determines whether or not the projection operation has been performed for a predetermined time, for example, 0.5 [second] (step C105). If not, the process returns to the process from step C103. Continue the projection operation.

  When the projection operation of the received image data is continued and a fixed time has elapsed, it is determined in step C105, and the process returns to the processing from step C101 in order to again irradiate the entire surface with white light as a normal flashlight. .

  As described above in detail, according to the present embodiment, since the irradiation timing of the image can be accurately grasped by the position of the irradiation light of the flashlight projector 1, various operation timings of the image projected by the portable projector are accurately determined. It becomes possible to control.

  In addition, in the above-described embodiment, since the flashlight projector 1 transmits terminal ID information, different images can be projected depending on the position of each projection device, so that a variety of image projection environments can be constructed.

  Further, a system configuration may be adopted in which different images can be seen by the user (projection device possessed) even at the same place by projecting different images according to the terminal ID information of the projection device even at the same optical sensor position.

  Unlike the above-described embodiment, a plurality of image data is stored in advance in the program memory 29 on the flashlight projector 1 side, which is a terminal, and the control signal including information that simply indicates the type of image data is received from the PC 4. The CPU 27 may select an image on the flashlight type projector 1 side that has received the communication.

  With such a configuration, although it depends on the data size of the image to be projected, the time required for data communication can be shortened, and as a result, the projection of the image can be performed more quickly.

  In addition, in the control signal transmitted from the PC 4 to the flashlight type projector 1, an expression effect accompanied by movement on the projected image, for example, an intentionally focused state in which the image is enlarged or reduced to change the size. Information indicating visual effects, such as changing the state that does not exist with the passage of time or rotating the image along the projection plane, may be added to make the expression more diverse.

  Further, although not described in the above embodiment, not only an image but also a flashlight projector 1 or a screen 2, 2,... It is also possible to intentionally vibrate the flashlight projector 1 by including a vibrator in the projector 1.

  In the above-described embodiment, the flashlight projector 1 emits UV light to project an image by black light, so that the expressive power as a visual effect in a dark place can be further enriched.

  In the above-described embodiment, the case of using a projector device of the DLP (registered trademark) system has been described. However, on the screen, the laser light emitted by RGB three-color time division is scanned by a MEMS (Micro Electro Mechanical Systems) scanner. By using a laser scanning projector device that obtains a two-dimensional image, a projection lens is unnecessary, and an image in a focused state can be projected regardless of the projection distance. Therefore, even if each user projects an image from a free position, a clear image can be projected without being out of focus.

  In the above embodiment, the configuration in which the present invention is applied to the projection system for “haunted house” is illustrated. However, the present invention is applied not only to “haunted house” but also to “museum”, “art museum”, etc. Of course, a description may be projected when a person irradiates an object with the projector of the present invention.

  In this case, for example, an optical sensor that is grounded by irradiating a certain direction with respect to the exhibit, for example, a position adjacent to the right side, may detect the irradiation of the light and project an image such as a commentary or an illustration. Furthermore, audio data is added instead of the visual effect information to be added to the image data described above, and an audio decoder, an amplifier circuit, and a speaker are provided on the flashlight projector 1 side, and audio is output from the flashlight projector 1. It is also conceivable to adopt a configuration for outputting a loud sound.

  Further, in the present embodiment, the optical sensor 2a is configured to selectively receive green light emitted from the flashlight projector 1, but may receive light of other colors.

  In this embodiment, the flashlight projector 1 is a light sensor that detects light by driving and emitting light so as to encode and modulate the terminal ID information of its own device into information that changes (blinks) in time with the G-LD 18. The terminal ID information assigned to each flashlight projector 1 is detected by demodulating the information that changes in brightness (blinks) with time from the output of 2a. For example, Bluetooth (registered trademark) or the like is detected. By using a short-range wireless technology, a flashlight projector is provided with a wireless information transmission function, and by providing a receiver that receives the wireless information near the optical sensor 2a, terminal ID information is transmitted and received by short-range wireless, It may be configured to detect.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the embodiment, if an effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

The invention described in the claims of the present application of the present application will be appended below.
The invention according to claim 1 is based on a light source unit that emits illumination light, a reception unit that receives a control signal instructing projection of an image, and a control signal received by the reception unit using light emitted from the light source unit. A projection device including a projection unit that forms and projects a light image, a plurality of optical sensors that are laid at an image projection position by the projection device and that detect irradiation of light from the projection device, and the optical sensor And a control device including a transmission unit that wirelessly transmits the control signal for instructing the projection device to project an image according to a detection result.

  According to a second aspect of the present invention, in the first aspect of the present invention, the projection unit projects a blinking pattern based on identification information assigned in advance to each device, and the optical sensor receives the light from the projection device. The flickering pattern is detected, and the control device further includes an identifying unit that identifies an individual projection device from the flickering pattern detected by the optical sensor, and the transmitting unit is responsive to the individual projection device identified by the identifying unit. The control signal is wirelessly transmitted.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the control signal wirelessly transmitted by the control device includes information on visual effects that specify movement relating to image projection, and audio corresponding to the projected image. Including the additional information including at least one of the information, and the projection device performs a reproduction operation according to the additional information when the additional information is included in the control signal received by the receiving unit. The projection system according to claim 1.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the projection device includes a storage unit that stores a plurality of image data and the control signal received by the reception unit. And a selection unit that selects image data to be read from the storage unit.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the light source unit oscillates RGB three-color laser light in a time-sharing manner, and the projection unit emits light from the light source unit. A laser image is scanned toward a projection target to form an optical image.

  A sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, wherein the light source unit further includes an ultraviolet light emitting element.

  DESCRIPTION OF SYMBOLS 1 ... Flashlight type projector, 1a ... Power switch, 2 ... Screen, 2a ... Optical sensor, 3 ... Repeater, 4 ... Personal computer (PC), 11 ... Wireless LAN antenna, 12 ... Wireless LAN interface (I / F) ), 13 ... Image drive unit, 14 ... Micromirror element, 15 ... Light source unit, 16 ... Mirror, 17 ... Projection lens unit, 18 ... G-LD, 19 ... R-LED, 20 ... B-LD, 21 ... UV -LED, 22-24 ... Dichroic mirror, 25 ... Mirror, 26 ... Light source drive unit, 27 ... CPU, 28 ... Main memory, 29 ... Program memory, 30 ... Operation unit, 31 ... Triaxial acceleration sensor, AR ... Passage, CR: Control room, SB: System bus.

Claims (6)

A light source unit that emits illumination light, a reception unit that receives a control signal instructing projection of an image, and a light that is emitted from the light source unit is formed and projected based on the control signal received by the reception unit. A projection device comprising a projection unit for
A plurality of optical sensors that are laid at an image projection position by the projection device and detect irradiation of light from the projection device;
A projection system comprising: a control unit including a transmission unit that wirelessly transmits the control signal that instructs the projection device to project an image according to a detection result of the optical sensor. The projection unit projects including a blinking pattern based on identification information assigned in advance for each projection device,
The light sensor detects the blinking pattern from the projection device;
The control device further includes an identification unit that identifies an individual projection device from the blinking pattern detected by the optical sensor, and the transmission unit wirelessly transmits the control signal to the individual projection device identified by the identification unit. The projection system according to claim 1, wherein the projection system transmits. The control signal wirelessly transmitted by the control device includes additional information including at least one of information on a visual effect that designates a motion related to image projection and audio information corresponding to the projection image,
3. The projection system according to claim 1, wherein when the additional information is included in the control signal received by the receiving unit, the projection apparatus performs a reproduction operation according to the additional information. .   The projection apparatus further includes a storage unit that stores a plurality of image data, and a selection unit that selects image data to be read from the storage unit based on the control signal received by the reception unit. The projection system according to claim 1. The light source unit oscillates RGB three-color laser light in a time-sharing manner,
The projection system according to claim 1, wherein the projection unit scans laser light from the light source unit toward a projection target to form a light image.   The projection system according to claim 1, wherein the light source unit further includes an ultraviolet light emitting element.

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