JP6167308B2 - Projection device - Google Patents

Description

  The present disclosure relates to a projection apparatus that detects a predetermined object and projects an image following the detected object.

  In recent years, an advertising method (digital signage) using a display device such as a liquid crystal display device or a projector has become widespread as a method for transmitting information such as advertisements and guidance to moving people. Furthermore, a liquid crystal display device that detects a moving person and displays information individually for the detected person has been researched and developed (see, for example, Patent Documents 1 and 2).

  Patent Document 1 discloses a video camera that captures a moving body passing through a wall surface or floor surface with a fixed frame in the background, and position coordinates of the moving body that has entered the current image sequentially captured by the video camera. Based on the extracted position coordinates, display position coordinates that are separated from the position coordinates are calculated, and information such as texts and images is displayed in a predetermined display size in the calculated display position coordinates. An image processor that sequentially inserts and outputs as video information, and a video that has a display screen on the wall or floor, and displays video information such as text and images of a predetermined display size on the display screen as the mobile object moves A moving body-associated information display device including the display device is disclosed. According to this video display device, a moving body (for example, a person) can be recognized by a video camera, and information can be individually displayed on the recognized moving body.

JP 2005-115270 A JP 2012-118121 A

  Like the display device of Patent Document 1, detecting a person who is moving and presenting information to the detected person individually increases the possibility that information can be more reliably transmitted to the person. is there. In order to convey information more effectively, it is considered effective to add various effects in the information display method.

  The present disclosure provides a projection apparatus capable of presenting a projection image with a presentation effect added to a specific object (for example, a person).

In one aspect of the present disclosure, a projection apparatus is provided. The projection device includes a detection unit that detects a specific object, a projection unit that projects a projection image indicated by the video signal, a drive unit that changes the orientation of the projection unit to change the projection position of the projection image, and a detection unit In addition to the first control for projecting the projection image at a position following the movement of the specific object detected in step (2), the drive unit is configured to perform the second control for changing the projection position of the projection image according to the video signal. A control unit that controls , when the projection image is projected within a predetermined range from a position corresponding to the content indicated by the video signal, and is not projected within the predetermined range As compared with the above, the drive unit is controlled to project the projection image at a position closer to the specific object.

  According to the present disclosure, since the projection position of the projection image is changed according to the content of the video signal, various effects can be added in the video projection method.

It is a schematic diagram which shows the condition where a projector apparatus projects an image | video on a wall surface. It is a schematic diagram which shows the condition where a projector apparatus projects an image | video on a floor surface. It is a block diagram which shows the electric constitution of a projector apparatus. It is a block diagram which shows the electric constitution of a distance detection part. It is a figure for demonstrating the distance information acquired by the distance detection part. It is a block diagram which shows the optical structure of a projector apparatus. It is a figure explaining the usage example of a projector apparatus. It is a figure which shows the image | video of a quick motion. It is a figure explaining the motion of the drive part which changes according to the image | video of a quick motion. It is a figure which shows the image | video of a slow motion. It is a figure explaining the motion of the drive part which changes according to the image | video of a slow motion. 3 is a block diagram illustrating a functional configuration of a control unit of the projector device according to Embodiment 1. FIG. FIG. 10 is a diagram for describing a trajectory of a projection image added for presentation in Embodiment 2. FIG. 10 is a block diagram showing a functional configuration of a control unit of a projector device in a second embodiment. 10 is a block diagram illustrating a functional configuration of a control unit of a projector device according to Embodiment 3. FIG.

  In addition, the inventor provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the claimed subject matter. .

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The applicant provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the subject matter described in the claims. Absent.

(Embodiment 1)
The first embodiment will be described below with reference to the accompanying drawings. Hereinafter, a projector apparatus will be described as a specific embodiment of the projection apparatus according to the present disclosure.

[1-1. Overview]
An outline of a video projection operation by the projector device 100 will be described with reference to FIGS. 1 and 2. FIG. 1 is an image diagram in which the projector device 100 projects an image on the wall 140. FIG. 2 is an image diagram in which the projector device 100 projects an image on the floor 150.

  As shown in FIGS. 1 and 2, the projector device 100 is fixed to the housing 120 together with the drive unit 110. Wirings electrically connected to the respective parts constituting the projector main body 100b and the driving unit 110 are connected to a power source via the casing 120 and the wiring duct 130. Thereby, electric power is supplied to the projector main body 100b and the drive unit 110. The projector device 100 has an opening 101 in the projector main body 100b. Projector apparatus 100 projects an image through opening 101.

  The drive unit 110 can change the projection direction of the projector device 100 by driving to change the orientation of the projector main body 100b. The drive unit 110 can drive the projection direction of the projector device 100 so as to be in the direction of the wall 140 as shown in FIG. Thereby, the projector device 100 can project the image 141 on the wall 140. Similarly, the drive unit 110 can drive the projection direction of the projector device 100 so as to be in the direction of the floor 150 as shown in FIG. Thereby, the projector device 100 can project the image 151 onto the floor 150. The drive unit 110 may be driven based on a user's manual operation, or may be automatically driven according to a detection result of a predetermined sensor. The content of the image 141 projected on the wall 140 and the image 151 projected on the floor 150 may be different or the same. The drive unit 110 includes an electric motor, and changes the orientation (posture) of the projector device 100 by rotating the projector main body 100b in the horizontal direction (pan direction) and the vertical direction (tilt direction), thereby projecting the image. And the projection position can be changed.

  The projector device 100 detects a specific object, follows the movement of the detected object, and projects a video (content) on a position or region having a predetermined positional relationship with respect to the position of the specific object. it can. In the following description, control for detecting a “person” as a specific object and projecting an image following the detected movement of the person is referred to as “person tracking control”.

[1-2. Constitution]
Hereinafter, the configuration and operation of the projector device 100 will be described in detail.

  FIG. 3 is a block diagram showing an electrical configuration of projector apparatus 100. The projector device 100 includes a drive control unit 200, a light source unit 300, a video generation unit 400, and a projection optical system 500. Hereinafter, the structure of each part which comprises the projector apparatus 100 is demonstrated in order.

  The drive control unit 200 includes a control unit 210, a memory 220, and a distance detection unit 230.

  The control unit 210 is a semiconductor element that controls the entire projector device 100. That is, the control unit 210 controls the operation of each unit such as the distance detection unit 230 and the memory 220 constituting the drive control unit 200 and the operation of the light source unit 300, the image generation unit 400, and the projection optical system 500. In addition, the control unit 210 can perform digital zoom control for reducing / enlarging the projection image by video signal processing and geometric correction for the projection video in consideration of the orientation of the projection plane. The control unit 210 also controls the drive unit 110 to change the projection direction and projection position of the projection light from the projector device 100. The control unit 210 includes information on the current control position of the drive unit 110 in the pan direction and the tilt direction, and information on the speed when the drive unit 110 changes the orientation of the projector main body 100b in the pan direction and the tilt direction. Obtain from 110. The control unit 210 may be configured only by hardware, or may be realized by combining hardware and software. For example, the control unit 210 can be configured by one or a plurality of CPUs, MPUs, and the like.

  The memory 220 is a storage element that stores various types of information. The memory 220 includes a flash memory or a ferroelectric memory. The memory 220 stores a control program and the like for controlling the projector device 100. The memory 220 stores various information supplied from the control unit 210. Further, the memory 220 stores image data of still images and moving images to be projected, a reference table including settings such as positions and projection sizes at which images are to be projected, shape detection target object data, and the like. Yes.

  The distance detection unit 230 includes, for example, a TOF (Time-of-Flight) type distance image sensor (hereinafter referred to as a TOF sensor), and linearly detects a distance to an opposing projection surface or object. When the distance detection unit 230 faces the wall 140, the distance from the distance detection unit 230 to the wall 140 is detected. If the painting is hung on the wall 140, the distance detection unit 230 can detect the distance to the surface of the painting. Similarly, when the distance detection unit 230 faces the floor surface 150, the distance from the distance detection unit 230 to the floor surface 150 is detected. If an object is placed on the floor 150, the distance detection unit 230 can detect the distance to the surface of the object.

  FIG. 4A is a block diagram illustrating an electrical configuration of the distance detection unit 230. As shown in FIG. 4A, the distance detection unit 230 includes an infrared light source unit 231 that irradiates infrared detection light, and an infrared light reception unit 232 that receives infrared detection light reflected by an opposing surface (or object). And a sensor control unit 233. The infrared light source unit 231 irradiates the infrared detection light through the opening 101 so as to be diffused over the entire surface. The infrared light source unit 231 uses, for example, infrared light having a wavelength of 850 nm to 950 nm as infrared detection light. The controller 210 stores the phase of the infrared detection light emitted by the infrared light source unit 231 in an internal memory. When the opposing surfaces are not equidistant from the distance detection unit 230 and have an inclination or a shape, the plurality of pixels arranged on the imaging surface of the infrared light receiving unit 232 receive reflected light at different timings. Since the light is received at different timings, the phase of the infrared detection light received by the infrared light receiving unit 232 is different for each pixel. The sensor control unit 233 stores the phase of the infrared detection light received by each pixel by the infrared light receiving unit 232 in the memory.

  The sensor control unit 233 reads the phase of the infrared detection light emitted from the infrared light source unit 231 and the phase of the infrared detection light received by each pixel by the infrared light receiving unit 232 from the memory. The sensor control unit 233 measures the distance from the distance detection unit 230 to the opposite surface based on the phase difference between the infrared detection light emitted by the distance detection unit 230 and the received infrared detection light, and distance information (Distance image) can be generated.

  FIG. 4B is a diagram for explaining the distance information generated by the infrared light receiving unit 232 of the distance detection unit 230. The distance detection unit 230 detects the distance from the object that reflected the infrared detection light based on the phase difference described above for each of the pixels constituting the infrared image by the received infrared detection light. Thereby, the sensor control part 233 can obtain the detection result of the distance about the whole angle of view of the infrared image received by the distance detection part 230 for each pixel. The control unit 210 can acquire distance information from the distance detection unit 230.

  Based on the distance information, the control unit 210 can detect projection surfaces such as the walls 140 and the floor surface 150 and specific objects such as people and objects.

  In the above, the TOF sensor is exemplified as the distance detection unit 230, but the present disclosure is not limited to this. That is, as in a random dot pattern, a known pattern may be projected and a distance may be calculated from the deviation of the pattern, or a parallax obtained by a stereo camera may be used. Further, the projector device 100 may include an RGB camera (not shown) together with the distance detection unit 230. In that case, the projector device 100 may detect an object using image information output from the RGB camera together with distance information output from the TOF sensor. By using the RGB camera together, it is possible to detect an object using information such as the color of the object and characters written on the object in addition to the information of the three-dimensional shape of the object obtained from the distance information.

  Next, the optical configuration of the projector device 100 will be described. That is, the configuration of the light source unit 300, the image generation unit 400, and the projection optical system 500 in the projector device 100 will be described. FIG. 5 is a block diagram showing an optical configuration of projector device 100. As shown in FIG. 5, the light source unit 300 supplies light necessary for generating a projection image to the image generation unit 400. The video generation unit 400 supplies the generated video to the projection optical system 500. The projection optical system 500 performs optical conversion such as focusing and zooming on the video supplied from the video generation unit 400. The projection optical system 500 faces the opening 101 and projects an image from the opening 101.

  The configuration of the light source unit 300 will be described. As shown in FIG. 5, the light source unit 300 includes a semiconductor laser 310, a dichroic mirror 330, a λ / 4 plate 340, a phosphor wheel 360, and the like.

  The semiconductor laser 310 is a solid light source that emits S-polarized blue light having a wavelength of 440 nm to 455 nm, for example. S-polarized blue light emitted from the semiconductor laser 310 is incident on the dichroic mirror 330 via the light guide optical system 320.

  The dichroic mirror 330 has, for example, a high reflectance of 98% or more for S-polarized blue light having a wavelength of 440 nm to 455 nm, while P-polarized blue light having a wavelength of 440 nm to 455 nm and green having a wavelength of 490 nm to 700 nm. It is an optical element having a high transmittance of 95% or more for light to red light regardless of the polarization state. The dichroic mirror 330 reflects the S-polarized blue light emitted from the semiconductor laser 310 in the direction of the λ / 4 plate 340.

  The λ / 4 plate 340 is a polarizing element that converts linearly polarized light into circularly polarized light or converts circularly polarized light into linearly polarized light. The λ / 4 plate 340 is disposed between the dichroic mirror 330 and the phosphor wheel 360. The S-polarized blue light incident on the λ / 4 plate 340 is converted into circularly-polarized blue light and then irradiated onto the phosphor wheel 360 via the lens 350.

  The phosphor wheel 360 is an aluminum flat plate configured to be capable of high speed rotation. On the surface of the phosphor wheel 360, a B region which is a diffuse reflection surface region, a G region coated with a phosphor emitting green light, and an R region coated with a phosphor emitting red light. A plurality of and are formed. The circularly polarized blue light applied to the region B of the phosphor wheel 360 is diffusely reflected and reenters the λ / 4 plate 340 as circularly polarized blue light. The circularly polarized blue light incident on the λ / 4 plate 340 is converted into P-polarized blue light and then incident on the dichroic mirror 330 again. At this time, since the blue light incident on the dichroic mirror 330 is P-polarized light, it passes through the dichroic mirror 330 and enters the video generation unit 400 via the light guide optical system 370.

  The blue light or red light irradiated on the G region or R region of the phosphor wheel 360 excites the phosphor applied on the G region or R region to emit green light or red light. Green light or red light emitted from the G region or the R region is incident on the dichroic mirror 330. At this time, the green light or red light incident on the dichroic mirror 330 is transmitted through the dichroic mirror 330 and is incident on the image generation unit 400 via the light guide optical system 370.

  Since the phosphor wheel 360 rotates at high speed, blue light, green light, and red light are emitted from the light source unit 300 to the image generation unit 400 in a time-sharing manner.

  The video generation unit 400 generates a projection video corresponding to the video signal supplied from the control unit 210. The video generation unit 400 includes a DMD (Digital-Mirror-Device) 420 and the like. The DMD 420 is a display element in which a large number of micromirrors are arranged in a plane. The DMD 420 deflects each of the arranged micromirrors according to the video signal supplied from the control unit 210 to spatially modulate the incident light. The light source unit 300 emits blue light, green light, and red light in a time division manner. The DMD 420 repeatedly receives blue light, green light, and red light that are emitted in a time division manner through the light guide optical system 410 in order. The DMD 420 deflects each of the micromirrors in synchronization with the timing at which light of each color is emitted. Accordingly, the video generation unit 400 generates a projected video corresponding to the video signal. The DMD 420 deflects the micromirror according to the video signal into light that travels to the projection optical system 500 and light that travels outside the effective range of the projection optical system 500. Thereby, the video generation unit 400 can supply the generated projection video to the projection optical system 500.

  The projection optical system 500 includes optical members such as a zoom lens 510 and a focus lens 520. The projection optical system 500 enlarges the light incident from the video generation unit 400 and projects it onto the projection surface. The control unit 210 can control the projection area with respect to the projection target so as to obtain a desired zoom value by adjusting the position of the zoom lens 510. When the zoom value is increased, the control unit 210 moves the position of the zoom lens 510 in the direction in which the angle of view becomes narrower, thereby narrowing the projection area. On the other hand, when the zoom value is decreased, the control unit 210 moves the position of the zoom lens 510 in the direction in which the angle of view is widened to widen the projection area. In addition, the control unit 210 can adjust the focus of the projected video by adjusting the position of the focus lens 520 based on predetermined zoom tracking data so as to follow the movement of the zoom lens 510.

  In the above description, the configuration by the DLP (Digital-Light-Processing) method using the DMD 420 is described as an example of the projector device 100, but the present disclosure is not limited thereto. That is, the projector apparatus 100 may employ a liquid crystal configuration.

  In the above description, the configuration of the single plate system in which the light source using the phosphor wheel 360 is time-divided is described as an example of the projector device 100, but the present disclosure is not limited thereto. That is, the projector device 100 may employ a three-plate configuration including various light sources of blue light, green light, and red light.

  In the above description, the blue light source for generating the projected image and the infrared light source for measuring the distance are described as separate units, but the present disclosure is not limited thereto. That is, a unit in which a blue light source for generating a projected image and an infrared light source for measuring a distance may be integrated. If a three-plate method is adopted, a unit in which a light source of each color and an infrared light source are integrated may be used.

[1-3. Operation]
Hereinafter, the operation of the projector apparatus 100 having the above configuration will be described. The projector device 100 according to the present embodiment detects a person as a specific object, follows the detected movement of the person, and has a predetermined positional relationship with the position of the person (for example, in the traveling direction from the detected position of the person). A predetermined image can be projected at a position 1 m before).

  Specifically, the distance detection unit 230 irradiates infrared detection light toward a certain region (for example, an entrance of a store or a building), and acquires distance information in the region. Based on the distance information acquired by the distance detection unit 230, the control unit 210 detects the person, the position of the person, the traveling direction, the speed, and the like. The traveling direction and speed are detected from distance information of a plurality of frames. The control unit 210 determines a position to project the projection image based on the detected position of the person, the traveling direction, and the like. The control unit 210 controls the drive unit 110 to project the projection image at the determined position, and moves the projector main body 100b in the pan direction or the tilt direction. The control unit 210 detects the position of a person every predetermined period (for example, 1/60 seconds), and projects a video so that the projected image follows the person based on the detected position of the person.

  For example, as shown in FIG. 6, the projector device 100 is installed on a ceiling or a wall of a passage or a hall in a building, and when a person 6 is detected, the projected image 8 is projected following the movement of the person 6. To do. The projected image (content image) 8 is, for example, a figure or message such as an arrow that guides and guides the person 6 to a predetermined place or store, a message that welcomes the person 6, a text of an advertisement, a red carpet, etc. Includes graphics and images that produce movement. The projected image 8 may be a still image or a moving image. Accordingly, it is possible to present desired information to the detected person 6 at a position that is always easy to see according to the movement of the detected person 6, and to reliably transmit the desired information to the person 6. Become.

  Further, the projector device 100 according to the present embodiment controls the projection position of the video according to the content of the content image indicated by the video signal, in addition to the trajectory control of the projection image by the human follow-up control.

  Specifically, the trajectory of the drive unit 110 is controlled according to the frequency of the video signal, the movement of the object included in the video indicated by the video signal, and the like. For example, if the video indicated by the video signal changes rapidly, the drive unit 110 is moved quickly. If the video indicated by the video signal is a loose video, the drive unit 110 is moved slowly. Alternatively, the drive unit 110 is moved in a direction in which a person is desired to be guided according to the content (content) of the video signal. Alternatively, if the video indicated by the video signal is a video that turns around, the drive unit 110 may also be moved around. If the video indicated by the video signal is a video in which a person walks to the right, the drive unit 110 may be moved to the right.

  For example, as shown in FIG. 7A, when the video signal indicates a soccer ball and the movement of the soccer ball is fast, the control unit 210 of the projector device 100 determines the speed of the soccer ball as shown in FIG. 7B. Accordingly, the drive unit 110 is moved quickly. On the other hand, when the movement of the soccer ball indicated by the video signal is slow as shown in FIG. 8A, the control unit 210 of the projector device 100 causes the driving unit 110 to respond to the slow movement of the soccer ball as shown in FIG. 8B. Move the direction of slowly.

  As described above, the projector device 100 changes the driving method of the driving unit 110 (that is, the projection trajectory of video) according to the content of the video signal. In other words, the projector device 100 according to the present embodiment adds an operation (drive) based on the effect to an operation (drive) based on the human follow-up control regarding the drive of the drive unit 110. Hereinafter, the operation of the projector apparatus 100 will be described in detail.

  FIG. 9 is a diagram illustrating a functional configuration of the control unit 210. The control unit 210 includes a control block 10 that performs human follow-up control and a control block 20 that performs control for a rendering operation. The controller 210 adds the drive command (voltage) generated in the control block 10 and the drive command (voltage) generated in the control block 20 by the adder 17 to generate a final drive command (voltage). . This drive command (voltage) is output to the drive unit 110 to control the drive unit 110.

[1-3-1. Human tracking control]
First, the operation of the control block 10 that generates a drive command for human follow-up control will be described. In the following description, the position and speed are two-dimensional vectors having magnitude and direction.

  The human position detection unit 11 detects a person based on the distance information (distance image) from the distance detection unit 230. A person is detected in advance by storing a feature value indicating a person in the memory 220 and detecting an object indicating the feature value from distance information (distance image). The person position detecting unit 11 further calculates the position (relative position) of the detected person. Here, “relative position” refers to a position in a coordinate system centered on the position of the drive unit 110. The projection target position calculation unit 13 calculates the target projection position (relative position) of the projection image based on the detected position of the person. For example, a position that is separated from the detected person's position by a predetermined distance (for example, 1 m) in the traveling direction is calculated as the target projection position. The drive command calculation unit 15 is a drive for driving the drive unit 110 so as to control the orientation of the projector device 100 so that the projection image from the projector device 100 is projected onto the target projection position (relative position). Calculate the command (voltage).

[1-3-2. Drive control for production]
Next, the operation of the control block 20 that generates a drive command for production will be described. The position / speed acquisition unit 23 acquires distance information from the distance detection unit 230 and calculates a projection position for the currently projected image based on the distance information.

  The projection size calculation unit 25 acquires the position of the projection image from the position / velocity acquisition unit 23, and calculates the size of the object included in the video indicated by the video signal based on the acquired position of the projection image. Here, the size of the object in the video signal is set smaller as the projection position becomes farther so that the size of the object at the projected location is always constant.

  The background image speed detection unit 29 detects the speed of a background image that is an image other than the main object included in the content image 27 from the content image 27 indicated by the video signal. This speed is detected in units of pixel / s.

  The background image speed calculation unit 30 calculates the speed (m / s) of the background image where the content image 27 is actually projected from the speed of the background image in the content image 27 by the projection size calculation unit 25. The image size is used for calculation.

  Projector apparatus 100 stores effect trajectory information 37 in memory 220. The effect trajectory information 37 is information indicating a movable range in the trajectory of the drive unit 110. The drive unit 110 cannot move (turn) beyond the movable range. The projection range determination unit 39 determines whether or not the projection target position calculated in the human follow-up control exceeds the movable range, and outputs the determination result to the speed calculation unit 31.

  The speed calculation unit 31 calculates the movement speed of the projection position of the projection image based on the speed of the background image. Specifically, the speed calculation unit 31 calculates the movement speed of the projection position of the projection image so that the background image looks stationary. That is, the speed calculation unit 31 moves the speed (orientation and size) so that the projection image is advanced in a direction opposite to the direction in which the main object included in the projection image moves and at a speed equivalent to the speed of the background image. ) Is calculated. When the speed calculation unit 31 receives a determination result indicating that the projection target position exceeds the movable range from the projection range determination unit 39, the speed calculation unit 31 sets the movement speed of the projection position of the projection image to zero. .

  The angular acceleration calculation unit 33 calculates an angular acceleration related to driving of the drive unit 110 from the moving speed of the projection position of the projection image calculated by the speed calculation unit 31. Subsequently, the drive command calculation unit 35 calculates a drive command (voltage) for driving the drive unit 110 based on the angular acceleration. In this way, the control block 20 calculates a drive command related to driving of the drive unit 110 for the rendering operation.

  The adder 17 adds the drive command (voltage) for the human follow-up control calculated by the control block 10 and the drive command (voltage) for the rendering operation calculated by the control block 20 to add the drive command (voltage). A drive command (voltage) for 110 is generated and output. The drive unit 110 rotates in the pan direction and the tilt direction based on a drive command (voltage).

  As described above, according to the projector device 100 of the present embodiment, the speed for rendering according to the content of the video signal is added to the driving speed of the image determined by the human follow-up control. As a result, the projector device 100 can project a projection image with a production effect while projecting a projection image while following a person.

[1-4. Effect, etc.]
As described above, the projector device 100 according to the present embodiment includes the human position detection unit 11 that detects a person (an example of a specific object) and the projection unit that projects the projection image indicated by the video signal (the video generation unit 400 and the projection). An optical system 500), a driving unit 110 that changes the direction of the projection unit in order to change the projection position of the projection image, and a first unit that projects the projection image at a position that follows the movement of the person detected by the human position detection unit 11. A control unit 210 that controls the drive unit 110 to perform a second control (control block 20) that changes the projection position of the projection image in accordance with the video signal in addition to the control (control block 10) of 1; Is provided.

  With the above configuration, the trajectory of the projection image (the trajectory of the drive unit 110 according to the content of the projected image) can be changed in addition to the human tracking trajectory, so that an impressive video is presented to the viewer. It is possible to effectively guide, guide, and promote a desired place, store, etc.

(Embodiment 2)
Another example of effect control according to the content of the video signal will be described. In the present embodiment, as shown in FIG. 10, a predetermined trajectory (for example, a circular trajectory) 91 for production is added to the trajectory of the projection image in addition to the trajectory 90 that follows the person. Further, the moving speed of the projection position of the projection image is controlled according to the temporal change amount (frequency) of the video signal.

  The configuration of the projector device of the present embodiment is basically the same as that of the first embodiment described with reference to FIGS. 1 to 5, but the function and operation of the control unit 210 are different from those described above.

  A specific operation of the control unit 210 in the present embodiment will be described with reference to FIG. FIG. 11 is a diagram illustrating a functional configuration of the control unit 210 in the present embodiment. The operation of the control block 10 that performs human tracking control is the same as described above. Hereinafter, the operation of the control block 20b that performs effect control will be described.

  The image change amount detection unit 41 detects a temporal change amount (frequency) of the image from the content image 27 indicated by the video signal.

  The projection speed value calculation unit 43 determines the absolute value of the movement speed of the projection position when projecting the projection image according to the temporal change amount. Specifically, the projection speed value calculation unit 43 sets the absolute value of the movement speed of the projection position of the projection image to a larger value as the temporal change amount (frequency) is higher. Thereby, if the video indicated by the video signal changes rapidly, the projected image is moved fast, and if the video indicated by the video signal changes slowly, the projected image is moved slowly. However, when the temporal change amount of the video exceeds a predetermined threshold value (upper limit value), the movement speed of the projection position of the projection image is limited to the upper limit value or less. This is because if the temporal change amount (frequency) of the image is large, the visibility may deteriorate when the image is moved quickly.

  The effect trajectory information 45 is information indicating the effect trajectory of the projection image, and includes, for example, information indicating the trajectory 91 shown in FIG. The effect trajectory information 45 is stored in the memory 220.

  The speed calculation unit 31 acquires the projection target position obtained by the human follow-up control, the absolute value of the speed obtained by the projection speed value calculation unit 43, and the rendering trajectory information 45, and based on these information For example, the speed at which the projected image is moved on the floor or wall surface is calculated.

  The angular acceleration calculation unit 33 calculates an angular acceleration related to driving of the driving unit 110 from the speed of the projection image calculated by the speed calculation unit 31. The drive command calculation unit 35 calculates a drive command (voltage) for driving the drive unit 110 based on the angular acceleration calculated by the angular acceleration calculation unit 33. In this way, the drive command related to the drive of the drive unit 110 for the rendering operation is calculated by the control block 20b.

  The drive command generated by the control block 10 and the drive command generated by the control block 20 are added by the adder 17 and output to the drive unit 110, and the drive unit 110 is controlled.

  As described above, according to the control of the present embodiment, it is possible to add the effect trajectory 91 to the projection trajectory of the projection image in addition to the human tracking trajectory 90. Further, according to the control of the present embodiment, the temporal change amount of the image is detected, and when the change amount is large, the speed (absolute value) of the effect image is reduced. As a result, for an image that changes rapidly in time, the decrease in visibility due to a change in the projection position due to the movement of the projection image is reduced.

  In the above example, the moving speed of the image by the effect control is set based on the temporal change amount of the image, but instead of the temporal change amount of the image or together with the temporal change amount of the image, You may set the speed of the image by effect control based on the spatial frequency of an image. For example, the higher the spatial frequency, the larger the moving speed of the image by effect control may be set.

  In the above example, the circular trajectory has been described as an example of the effect trajectory, but the trajectory shape is not limited thereto. For example, the shape of figure 8 may be sufficient.

  The memory 220 stores a plurality of types of trajectory information as the rendering trajectory information 45, and one trajectory information may be selected from the plurality of types of trajectory information according to the content of the projection image. Good. For example, one piece of trajectory information may be selected based on the frequency of the image, the luminance of the video signal, the movement of the object, the shape of the object, etc., and added to the human tracking trajectory.

(Embodiment 3)
The projector device 100 according to the present embodiment projects the projected image closer to the person who is the follow-up target of the projection image when the person who is the follow-up target of the projection image approaches a predetermined position. Thereby, a person who wants to visually recognize the projected image can pay attention to the projected image, and information related to the position can be more reliably transmitted.

  The configuration of the projector device of the present embodiment is basically the same as that of the first and second embodiments described with reference to FIGS. 1 to 5, but the function and operation of the control unit 210 are the same as those described above. Different.

  A specific operation of the control unit 210 in the present embodiment will be described with reference to FIG. FIG. 12 is a diagram illustrating a functional configuration of the control unit 210 in the present embodiment. The operation of the control block 10 that performs human tracking control is the same as described above. Hereinafter, the operation of the control block 20c that performs effect control will be described.

  The content image 27 includes an image created for advertising of the store for each store. The content image 27 includes advertisement images for a plurality of stores, and is configured to be displayed while switching the store image for each store.

  The corresponding store position information 55 stores position information of each store included in the content image (for example, position information of the storefront of each store). The corresponding store location information 55 is stored in the memory 220.

  The position / speed acquisition unit 23 acquires distance information from the distance detection unit 230. Further, the position / speed acquisition unit 23 acquires information on the position of the driving unit 110 (position in the pan / tilt direction) and the driving speed from the driving unit 110. The position / speed acquisition unit 23 calculates the current projection position of the projection image and the movement speed of the projection image based on the information acquired from the distance detection unit 230 and the driving unit 110, respectively.

  The distance calculation unit 51 calculates the distance between the current projection position of the projection image (in other words, the position of the person who is the tracking target of the projection image) and the position of the store corresponding to the content image 27. Specifically, the distance calculation unit 51 specifies a corresponding store from the content image 27 and obtains the position of the specified store with reference to the corresponding store position information 55. The distance calculation unit 51 calculates the distance between the current projection position of the projection image and the specified shop position.

  The correction distance setting unit 53 determines the current projection position of the projection image from the specified store based on the distance between the current projection position of the projection image calculated by the distance calculation unit 51 and the specified store position. It is determined whether it is within a predetermined range. Here, the predetermined range is a range in which it is determined that a person has approached the store, and is set, for example, within a radius of 2 m to 3 m from the position of the specified store.

  When it is determined that the current projection position of the projection image is not within the predetermined range from the specified store, the correction distance setting unit 53 sets the correction value of the distance between the person who follows the projection image and the projection image to zero Set. On the other hand, when it is determined that the current projection position of the projection image is within a predetermined range from the specified store, the correction distance setting unit 53 determines that the distance between the person who follows the projection image and the projection image is human tracking. The distance correction value is set so as to be shorter than a predetermined distance (for example, 1 m) set in the control. Then, the correction distance setting unit 53 sets the correction position of the projection image (relative position based on the position of the person) based on the correction value of the distance. That is, the correction position (relative position) of the projection image is set so that the projection image is projected at a position closer to the person than the predetermined distance set in the human follow-up control, and is output to the speed calculation unit 31. The

  Thereafter, the speed calculation unit 31, the angular acceleration calculation unit 33, and the drive command calculation unit 35 obtain a drive command based on effect control. The adder 17 adds the drive command based on the human follow-up control and the drive command based on the effect control, and outputs the result to the drive unit 110.

  By the above control, when a person who wants to present information moves near a store corresponding to the content image to be projected, the distance between the projected image and the person who wants to present information can be reduced and projected. . The projected image is projected closer to the person who wants to present information, so that the attention of the person who wants to present information is easily directed to the projected image, and it is effective to notify the existence of the store, guide to the store, advertisement, etc. Can be done.

(Other embodiments)
As described above, Embodiments 1 to 3 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, substitutions, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1-3 and it can also be set as new embodiment. Therefore, other embodiments will be exemplified below.
(1) The projector device 100 according to the present disclosure is an example of a projection device. The human position detection unit 11 in the present disclosure is an example of a detection unit that detects a specific object. The image generation unit 400 and the projection optical system 500 in the present disclosure are examples of a projection unit. The drive unit 110 in the present disclosure is an example of a drive unit that changes the orientation of the projection unit. The control unit 210 in the present disclosure is an example of a control unit that controls the drive unit.
(2) In the above embodiment, the movement speed of the projection position of the projection image in the effect control is determined based on the speed of the main object (that is, the background image) in the image and the frequency of the image. You may determine based on an attribute. For example, the movement speed of the projection position of the projection image in effect control may be controlled based on the luminance of the video signal. As the brightness of the video signal such as “bright scene” or “dark scene” increases, the movement speed of the projection position of the projected image by the effect control may be increased. Alternatively, if the change in the luminance of the video signal is large and the speed of the projected video is high, the visibility decreases. Therefore, the larger the change in the luminance of the video signal, the slower the moving speed of the projection position of the projected image by the effect control. May be.
(3) In Embodiments 1 and 2, the moving speed of the projection position of the projected image by the effect control is set to a faster value as the speed of the object in the image or the amount of time change (frequency) is higher. However, if importance is placed on ensuring visibility, the moving speed of the projected position of the projected image of the image by effect control is set to a slower value as the speed of the object in the image or the amount of time change (frequency) is higher. You may make it do. This is because the speed in the image and the moving speed of the projected image are added to avoid an unnecessary speed and a decrease in visibility.
(4) In the above embodiment, a person is detected as a specific object and a predetermined image (content) is displayed following the movement of the person. However, the specific object is not limited to a person. For example, a moving object other than a person such as an automobile or an animal may be used.
(5) In the above embodiment, distance information is used to detect a specific object, but the specific object detection means is not limited to this. Instead of the distance detection unit 230, an imaging device that can capture an image using RGB light may be used. A specific object may be detected from an image captured by the imaging device, and the position, speed, and the like of the specific object may be detected.
(6) The techniques disclosed in the first to third embodiments can be appropriately combined.

  As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

  Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, substitution, addition, omission, etc. can be performed in a claim or its equivalent range.

  The projection device according to the present disclosure can be applied to various uses for projecting an image onto a projection surface.

6 person 8 projected image 10, 20, 20b, 20c control block 11 person position detecting unit 13 projection target position calculating unit 15 drive command calculating unit 17 adding unit 23 position / velocity acquiring unit 25 projection size calculating unit 27 content image 29 background image Speed detection unit 30 Background image speed calculation unit 31 Speed calculation unit 33 Angular acceleration calculation unit 35 Drive command calculation unit 37 Effect trajectory information 39 Projection range determination unit 41 Image change amount detection unit 43 Projection speed value calculation unit 45 Effect trajectory information 51 Distance calculation unit 53 Correction distance setting unit 55 Corresponding store position information 90, 91 Track 100 Projector device 100b Projector main body unit 101 Opening unit 110 Drive unit 120 Housing 130 Wiring duct 140 Wall 141, 151 Video 150 Floor surface 200 Drive control unit 210 Control unit 220 Memory 230 Distance detection Unit 231 infrared light source unit 232 infrared light receiving unit 233 sensor control unit 300 light source unit 310 semiconductor laser 320 light guide optical system 330 dichroic mirror 340 λ / 4 plate 350 lens 360 phosphor wheel 370 light guide optical system 400 image generation unit 410 Light guiding optical system 420 DMD
500 Projection optical system

Claims (1)

A detection unit for detecting a specific object;
A projection unit that projects a projection image indicated by the video signal;
A drive unit that changes the orientation of the projection unit in order to change the projection position of the projection image;
In addition to the first control for projecting the projection image at a position following the movement of the specific object detected by the detection unit, the second control for changing the projection position of the projection image according to the video signal. A control unit for controlling the drive unit to perform ,
When the projected image is projected within a predetermined range from a position corresponding to the content indicated by the video signal, the control unit uses the specific object as compared with a case where the projected image is not projected within the predetermined range. A projection device that controls the drive unit to project the projection image at a close position .

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