JP2016061916A - Projection apparatus, projection method, and program - Google Patents

Abstract

[PROBLEMS] To positively utilize reflected light on a screen to further improve appeal to users. A projection system 11 that emits a light image, a screen SB that transmits a part of the light image emitted from the projection system 11 and displays an image, and a projection condition of the projection system 11 or characteristics of the screen SB. A control unit for adjustment. [Selection] Figure 2

Description

  The present invention relates to a projection apparatus, a projection method, and a program suitable for an apparatus that is installed, for example, in a store and introduces various products.

  In order to increase the impression to the viewer, a video output device-equipped device has been proposed in which video content is projected onto an atypical screen such as a human figure by rear projection projection. (For example, Patent Document 1)

JP 2011-150221 A

  In the projection apparatus of the rear projection system including the technique described in the above patent document, all of the projection light does not pass through the screen and is used for forming a light image. Is reflected and emitted to the back side of the apparatus.

  Therefore, not only is the light that should be provided for displaying the image originally wasted, but in particular, an open type device without a cover such as a casing is provided on the upper rear side of the screen, and a white wall such as white is provided on the rear side. When installed in a certain place, an image similar to the image projected on the screen is projected thinly out of focus on the wall surface behind.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a projection apparatus that can positively utilize reflected light from a screen and improve appeal to users. Another object is to provide a projection method and a program.

  One embodiment of the present invention includes a projection unit that emits a light image, a screen that displays a part of the light image emitted from the projection unit, and a projection condition of the projection unit or characteristics of the screen. And a control unit for adjusting.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the appeal power with respect to a user more actively using the reflected light on a screen.

It is a perspective view which shows the external appearance structure of the signage apparatus which concerns on one Embodiment of this invention. The figure which looked at the structure of the projection optical system provided in the apparatus housing | casing upper part which concerns on the same embodiment from the side. FIG. 3 is an exemplary block diagram illustrating a functional configuration of the electronic circuit according to the embodiment. The flowchart which shows the processing content at the time of the back surface setting which concerns on the embodiment. 6 is a flowchart showing processing contents during projection processing according to the embodiment. The figure which illustrates the back-and-front image projection state concerning the embodiment.

Hereinafter, an embodiment in which the present invention is applied to a rear projection type signage apparatus will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an external configuration of a signage device 10 according to the present embodiment. A replaceable signage board SB is erected on the upper front end side of the apparatus housing 10A. This signage board SB has a semi-transparent plate-like configuration having an arbitrary shape, which is installed so as to be within the originally rectangular projectable area of the signage device 10.

  A plurality of, in this case, three operation buttons B1 to B3 are provided below the signage board SB mounting portion, and any of the buttons is touched by the user.

  Further, a pyroelectric sensor PE such as a pyroelectric infrared sensor for detecting the approach of the user, and speaker units SP and SP for outputting sound are provided at the lower part of the front surface of the apparatus housing 10A.

  The method for detecting the approach of the user is not limited to the pyroelectric sensor PE. Presence / absence of operation on operation buttons B1 to B3 provided on the signage device 10 as a detection unit for detecting the presence / absence of a person, presence / absence of sound detection by a directional microphone unit (not shown) provided on the signage device 10 The detection may be performed based on whether or not a person is detected by an imaging unit (not shown) provided in the signage device 10.

FIG. 2 is a diagram showing a cross-sectional configuration of the configuration of the projection optical system mainly provided in the signage device 10 taken along the line II-II in FIG.
The projection light beam LF emitted obliquely upward and rearward from the projection lens unit 11 is reflected further forward and downward by the first total reflection mirror 12A having a concave curved surface and then further reflected by the horizontal total reflection mirror 12B. The light is projected obliquely upward to the plate-shaped light control mirror 13 with variable reflectivity, and a part of the light amount is transmitted and the other is reflected.

  By changing the reflectance of the light control mirror 13, the amount of light transmitted and the amount of light reflected can be adjusted. That is, if the reflectance of the dimming mirror 13 is increased, the amount of light reflected by the dimming mirror 13 increases, and the viewer can easily view the image projected on the wall surface WL shown in FIG.

  On the other hand, if the reflectance of the light control mirror 13 is lowered, the amount of light incident on the screen 14 increases, and the viewer can easily view the image projected on the signage board SB. The dimming mirror 13 is connected to a dimming mirror driving unit 36 for controlling the reflectance.

  The dimming mirror driving unit 36 changes the voltage and / or current applied to the dimming mirror 12 so that the incident light incident from the photographing lens unit 11 is reflected and transmitted. 12 is controlled.

  The projected light beam LF that has passed through the light control mirror 13 is projected onto a semi-transparent curtain-like screen 14 that is integrated with the light control mirror 13.

  A transparent board 15 is integrally formed on the front side of the screen 14. The signage board SB is configured by the three layers of the light control mirror 13, the screen 14, and the transparent board 15 being integrated.

  The dimming mirror 13 may be constituted by, for example, a half mirror in which the amounts of transmitted light and reflected light are substantially equal. Preferably, the modulated light whose transmittance / reflectance can be varied within a predetermined range by electrical control. Configure with mirrors.

  With respect to the light control mirror whose transmittance / reflectance can be varied by electrical control, for example, Japanese Patent Application Laid-Open Nos. 07-140308, 2010-002573, 2013-218241, and 2007-102197. You may implement | achieve by the technique described in the gazette etc.

  Further, the projected light beam LF reflected by the light control mirror 13 is emitted obliquely upward on the back side of the signage device 10. If there is a wall surface or the like on the back of the signage device 10, the signage is provided on the wall surface or the like. An image similar to the image projected on the board SB is projected larger.

  The signage device 10 has a photographing optical axis IA substantially coincident with the projection light emitted obliquely upward on the back side of the signage device 10, and a photographing lens unit 16 for photographing an image projected on a wall surface or the like. It is provided in the body 110A.

  The photographing field angle of the photographing lens unit 16 is set so as to sufficiently cover the range that the projection light beam LF reflected by the dimming mirror 13 can take, and an image is displayed on the wall surface on the back side of the signage device 10. When projected, the entire range is set to be photographable.

  Next, the functional configuration of mainly the electronic circuit of the signage apparatus 10 will be described with reference to FIG. In the figure, image data is read from a memory card (not shown) mounted on the memory card mounting unit 21 and sent to the projection image processing unit 22 via the system bus B.

  It is assumed that the memory card attached to the memory card attachment unit 21 stores image data of a test pattern image in addition to product image data to be advertised by the signage device 10.

  The projection image processing unit 22 multiplies a frame rate according to a predetermined format, for example, 120 [frames / second], the number of color component divisions, and the number of display gradations in accordance with the transmitted image data. The micromirror element 23 as a display element is driven to display by faster time-division driving.

  The micromirror element 23 performs a display operation by individually turning on / off each inclination angle of a plurality of micromirrors arranged in an array, for example, WXGA (horizontal 1280 pixels × vertical 768 pixels) at high speed. Thus, an optical image is formed by the reflected light.

  On the other hand, R, G, B primary color lights are emitted cyclically from the light source unit 24 in a time-sharing manner. The light source unit 24 includes an LED which is a semiconductor light emitting element, and repeatedly emits R, G, and B primary color lights in a time-sharing manner. The LED included in the light source unit 24 may include an LD (semiconductor laser) or an organic EL element as an LED in a broad sense.

  Moreover, it is good also as what uses the primary color light from which a wavelength differs from the original light excited by irradiating the light radiate | emitted from LED to a fluorescent substance. The primary color light from the light source unit 24 is totally reflected by the mirror 25 and applied to the micromirror element 23.

  Then, an optical image is formed by the reflected light from the micromirror element 23, and the formed optical image is projected to the outside through the projection lens unit 11.

  The projection lens unit 11 includes a focus lens for moving a focus position in an internal lens optical system, and the lens is aligned along the optical axis direction by a lens motor (M) 26 via a gear mechanism (not shown). The position is selectively driven.

  In addition, an imaging unit IM for capturing the projection image reflected by the light control mirror 13 is provided including the imaging lens unit 16. In the imaging unit IM, a CMOS image sensor 27 that is a solid-state imaging device is disposed at the focal position of the photographing lens unit 16.

  An image signal obtained by the CMOS image sensor 27 is digitized by the A / D converter 28 and then sent to the captured image processing unit 29.

  The photographed image processing unit 29 scans the CMOS image sensor 27 to execute a photographing operation, and performs image processing such as contour extraction, pattern matching, and color balance adjustment on image data obtained by photographing. Extraction of the shape and color components of the image reflected by the light control mirror 13 and projected onto the wall surface or the like behind the signage device 10 can be executed.

  Further, the photographed image processing unit 29 drives a lens motor (M) 30 for moving a focus lens position that constitutes a part of the photographing lens unit 16. The photographed image processing unit 29 drives the lens motor 30 by, for example, a contrast-type automatic focusing function to move the focus lens of the photographing lens unit 16 along the optical axis direction, and sets the focus distance of the image with the highest contrast. By obtaining, the distance to the wall surface behind the signage device 10 can be acquired.

  The CPU 31 controls all the operations of the above circuits. The CPU 31 is directly connected to the main memory 32 and the program memory 33. The main memory 32 is constituted by an SRAM, for example, and functions as a work memory for the CPU 31. The program memory 33 is composed of an electrically rewritable non-volatile memory, for example, a flash ROM, and stores an operation program executed by the CPU 31, various fixed data including test pattern image data, and the like.

  The CPU 31 controls the signage device 10 in an integrated manner by reading out the operation program, fixed data, etc. stored in the program memory 33, expanding and storing them in the main memory 32, and executing the program. To do.

  The CPU 31 executes various projection operations according to operation signals from the operation unit 34. The operation unit 35 includes a power key, the operation buttons B1 to B3 provided in the main body of the signage device 10, operation buttons for setting the back surface provided on the back surface of the device housing 10A, and a mounting base for the signage board SB. A key operation signal such as an operation key for detecting the replacement of the signage board SB is received, and a signal corresponding to the received operation is sent to the CPU 31.

The CPU 31 is further connected to the sound processing unit 35, the dimming mirror driving unit 36, and the pyroelectric sensor PE via the system bus B.
The sound processing unit 35 includes a sound source circuit such as a PCM sound source, converts the sound signal given during the projection operation into an analog signal, drives the speaker units SP and SP to emit sound, or generates a beep sound or the like as necessary.

  The dimming mirror driving unit 36 varies the transmittance / reflectance of the dimming mirror 13 within a predetermined range under the control of the CPU 31.

  The pyroelectric sensor PE is a sensor for detecting the approach when a user approaches the front periphery of the signage device 10, and the CPU 31 detects when the output of the pyroelectric sensor PE becomes equal to or higher than a preset threshold value. Judge that the user has approached.

  The CPU 31 is also connected to the power supply control unit 37 and determines whether or not a commercial AC power supply (hereinafter referred to as “AC power supply”) that is the main power supply of the signage device 10 is secured. The power control unit 37 generates a DC power source having a voltage required for each circuit from the AC power source and supplies the DC power source to each circuit. The power supply control unit 37 is connected to a spare battery unit 38 for operating the signage device 10 even when the AC power supply is cut off, and the necessary power including the CPU 31 is supplied from the spare battery unit 38. To distribute.

Next, the operation of the above embodiment will be described.
The operation described below is executed after the CPU 31 expands the operation program read from the program memory 33 in the main memory 32 as described above. The operation program and the like stored in the program memory 33 are not only those stored in the program memory 33 when the signage device 10 is shipped from the factory, but also install a version upgrade program after the user purchases the signage device 10. Including the contents.

  FIG. 4 is a flowchart showing the processing contents executed by the CPU 31 at the time of setting the back as a preliminary operation before projecting an actual advertisement image, such as when changing the position when the signage device 10 is installed in a store, for example. .

  At the beginning of the processing, the CPU 31 determines whether or not an operation button for instructing a new setting on the back side has been operated (step P101), or whether or not a new signage board SB has been replaced with a switch at the base of the signage board SB. (Step P102) is repeatedly determined to wait for a state of performing the rear surface setting process.

  If it is determined in step P101 that the operation button for instructing the new setting on the back side has been operated (Yes in step P101), or it is determined that a new signage board SB has been installed by a switch at the base of the signage board SB. If so (step P102), the CPU 31 drives the dimming mirror drive unit 36 to increase the reflectance at the dimming mirror 13 (step P103), and then obtains the test pattern image data from the program memory 33. The read image is displayed on the micromirror element 23 by the projection image processing unit 22, and an image of the test pattern is projected from the projection lens unit 11 (step P104).

  In this way, the image of the test pattern is projected, and the imaging unit IM is set in a state in which the light amount of the image projected on the back side of the signage device 10 as viewed from the viewer side is increased by increasing the reflectance at the light control mirror 13. The distance from the focus lens position of the photographic lens unit 16 having the highest contrast evaluation value to the wall surface behind the signage device 10 or the like is acquired by the AF (autofocus) function at (Step P105).

  In this case, the focus lens of the projection lens unit 11 is also driven by the lens motor 26, and the focusing state on the wall surface or the like to be projected is appropriately changed, so that the imaging unit IM can more accurately automatically focus. The distance to the wall surface behind the signage device 10 can be acquired.

  Next, the CPU 31 acquires the shape of the signage board SB mounted at that time, the shape of the wall surface to be projected, and the like from the shape of the test pattern image in the image obtained by the imaging unit IM (step P106).

  As for the shape of the signage board SB, the signage board SB may be obtained from the outline shape of the test pattern image in the photographed image, or the signage board SB shape code is obtained not in the photographed image but in the mounting portion of the signage board SB. It is also possible to form a code reading unit that can be used.

  As for the shape of the wall surface to be projected, the parallelism between the plane of the signage board SB and the wall surface, and the flatness of the wall surface (such as the presence or absence of a curved surface) are acquired from the test pattern image in the projection image.

  Thereafter, the CPU 31 acquires a color balance adjustment value from the test pattern image in the photographed image, and enables adjustment in consideration of the color of the wall surface (step P107).

  The various information acquired in this way is stored (step S108), and the series of processes is temporarily terminated as described above, and the process returns to step P101 to prepare for the next.

Next, processing contents when the image is actually projected by the signage apparatus 10 will be described.
FIG. 5 shows the processing contents during the projection operation by the CPU 31. At the beginning of the process, the CPU 31 confirms that AC power is supplied based on information from the power control unit 37 (step S101), and the detection output of the pyroelectric sensor PE exceeds a certain threshold. Whether or not the user is approaching in front of the signage device 10 is determined based on whether or not there is (step S102).

  When the detection output of the pyroelectric sensor PE is equal to or less than a certain threshold value and it is determined that the user is not approaching the front of the signage device 10 (No in step S102), the CPU 31 controls the light control mirror driving unit 36. Thus, the light control mirror 13 is driven to increase the reflectance (step S105).

  Thus, with the reflectivity at the dimming mirror 13 increased, the advertising image data set at that time is read out from the memory card mounting unit 21 and stored in step P108 of FIG. 4 for various rear projections. After correcting the projection distance, shape, and color balance based on the information of the above, the projected image processing unit 22 displays an image on the micromirror element 23 and projects it from the projection lens unit 11, and the voice processing unit 35 uses it for advertising purposes. The output of audio data is temporarily stopped (step S106).

  In this case, by increasing the reflectance at the dimming mirror 13, most of the light amount of the image from the projection lens unit 11 is reflected by the dimming mirror 13 and is largely projected on the wall surface behind the signage device 10. The

  If the detection output of the pyroelectric sensor PE exceeds a certain threshold value in step S102 and it is determined that the user is approaching the front of the signage device 10 (Yes in step S102), the CPU 31 performs the above adjustment. The optical mirror drive unit 36 is driven to increase the transmittance of the light control mirror 13 (step S103).

  In this way, with the transmittance at the dimming mirror 13 increased, the image data for advertisement set at that time is read from the memory card mounting unit 21, and the projected image processing unit 22 captures the image with the micromirror element 23. The sound is displayed and projected from the projection lens unit 11, and voice data for promotion by the voice processing unit 35 is output from the speakers SP and SP (step S104).

  In this case, since the transmittance at the light control mirror 13 is increased, most of the light amount of the image from the projection lens unit 11 is transmitted through the light control mirror 13 and used as a projection on the signage board SB.

  In this case, the focus lens of the projection lens unit 11 is set to a position corresponding to a known distance to the signage board SB, and the projection image is not deformed, the color balance is not adjusted, or the like when the image is projected on the back side. .

  FIG. 6 shows the image projection onto the signage board SB in step S104 and the image projection onto the back wall WL in step S106. Since the focus position, shape, and color balance of the projected image are adjusted according to the distance to the wall surface WL and the shape and color of the wall surface WL, the image projected on the signage board SB and the image projected on the wall surface WL are large. The image projected onto the wall surface WL as viewed from a distance of the signage device 10 and the image projected on the signage board SB when approaching the signage device 10 are projected. It becomes equal and does not give the user a sense of incongruity.

  When a half mirror having substantially the same amount of transmitted light and reflected light is used instead of the light control mirror 13, the image projection on the signage board SB and the image projection on the wall surface WL shown in FIG. 6 are performed simultaneously. Since it can be carried out, it is possible to realize image projection tailored to the user by controlling the focusing distance on one of the signage board SB or the wall surface WL depending on whether or not the user approaches.

  When it is determined in step S101 that AC power is not supplied based on information from the power control unit 37 (No in step S101), the CPU 31 uses the dimming mirror driving unit 36 to reflect the reflectivity on the dimming mirror 13. Is driven to increase (step S107).

  In a state where the reflectance at the dimming mirror 13 is increased in this way, the CPU 31 performs a preset emergency image, for example, a character string image that asks a store clerk in a power failure state, or an emergency evacuation route. Such an image or the like is read from the memory card mounting unit 21, and the projection image processing unit 22 corrects the projection distance, shape, and color balance based on the information for various rear projections stored in step P108 of FIG. An image is displayed by the mirror element 23 and projected from the projection lens unit 11, and the voice data of the emergency guide message by the voice processing unit 35 is stopped (step S108).

  In this case, by increasing the reflectance at the dimming mirror 13, most of the amount of light in the emergency image from the projection lens unit 11 is reflected by the dimming mirror 13, and the wall surface behind the signage device 10 or the like. Is projected greatly.

  From this projection state, the CPU 31 determines whether or not the supply of AC power has been restored (step S109). If it is determined that the AC power supply has not been restored (No in step S109), the projection state in step S108 is determined. By maintaining, it waits for the supply of AC power to recover.

  When it is determined that the supply of AC power has been restored (Yes in step S109), the process returns to step S101 again.

  The signage device 10 described above projects a first projection mode in which an image is projected onto the screen 14 constituting the signage board SB, and a second projection plane that is reflected from the back side of the screen 14 and is different from the screen 14. A second projection mode.

  Further, the CPU 31 configuring the control unit switches between the first projection mode and the second projection mode based on the result detected by the detection unit that detects the presence or absence of a person, and the first projection mode. When switching to, the focus position is adjusted with respect to the change of the projection distance by the movement of the optical system, and the screen 14 is adjusted to be in focus. When switching to the second projection mode, adjustment is made so that the second projection plane is in focus. Further, the first content to be projected in the first projection mode and the second content to be projected in the second projection mode are included, and the corresponding projection plane is focused according to the content to be projected. .

  Further, the size of the projected image can be changed according to the brightness of the surrounding environment where the signage device 10 is installed. For example, when projecting in the second projection mode for projecting onto the wall surface WL, if the surrounding environment is bright, it is difficult to see the projected image, so the projected image size is reduced. When the surrounding environment is dark, it is easy to visually recognize the projection image, so the projection image size is enlarged and displayed.

  As described above in detail, according to the present embodiment, it is possible to positively utilize the reflected light from the signage board SB and further improve the appeal to the user.

  In the above embodiment, the case where the focus position of the projection image by the projection lens unit 11 is controlled by the control of the focus lens has been described. However, in addition to the configuration in the lens optical system of the projection lens unit 11, an aperture stop is provided. If necessary, the amount of light of the projection image is reduced by reducing the aperture with the aperture stop according to the projection angle of view of the projection lens unit 11 set at that time, but the depth of field increases. As a result, the distance range in which the projection image emitted from the projection lens unit 11 is focused is widened, so that the control with the focus lens can be omitted.

  Thus, in the present application, the focus position of the light image emitted from the projection system, the aperture state of the aperture stop, the projection angle of view of the projection unit, the color of the emitted light image, the shape of the emitted light image, and the like are controlled. Thus, the projection image on the signage board SB and the projection image on the wall surface behind the signage device 10 can be appropriately switched or coexisted depending on the situation without a sense of incongruity.

  In particular, in the above embodiment, the distance to the wall surface behind the signage device 10 is measured, and the image projected on the wall surface according to the distance measurement result can be accurately focused, so the image is projected on the signage board SB. It is possible to project an image comparable to the image to be displayed on the wall surface WL or the like.

  In this case, in the present embodiment, since the distance to the wall surface behind the signage device 10 is acquired using an AF (automatic focusing) function in the imaging unit IM, the distance information can be acquired relatively easily by the existing technology. In addition, information other than distance, for example, the shape and color of the wall surface can be acquired together, and comprehensive control can be easily realized.

  In particular, by recognizing the shape of the wall surface and projecting an image of the corrected shape, it is possible to cope with a wall surface having a curved surface or unevenness, or a wall surface that requires a trapezoidal correction, not parallel to the surface of the signage board SB. As a result, an image having a shape similar to that of the signage board SB can be accurately projected on the wall surface.

  Moreover, in the said embodiment, since the approach of the user to the front of the signage apparatus 10 was detected using the pyroelectric sensor PE and the said projection conditions were adjusted with the detection result, according to the distance of a user This makes it possible to project an image with higher appeal.

  Furthermore, in the above-described embodiment, an emergency image is projected using a standby power source in the event of a power failure, so that it is not only used for advertising, but also useful in times of disaster such as projecting a large evacuation route in an emergency. Can provide.

  In addition, although the said embodiment demonstrated the case where it applied to the projection apparatus of DLP (Digital Light Processing) (trademark) system using the micromirror element 23, this invention does not limit a projection system, but a liquid crystal display. The same applies to a projection apparatus using a panel.

  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 some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

Hereinafter, the invention described in the scope of claims of the present application will be appended.
According to the first aspect of the present invention, there is provided a projection unit that emits a light image, a screen that displays an image by transmitting a part of the light image emitted from the projection unit, a projection condition of the projection unit, or the screen. And a control unit for adjusting characteristics.
According to a second aspect of the present invention, in the first aspect of the present invention, the first projection mode in which an image is projected onto the screen and the second projection surface that is reflected on the back side of the screen and is different from the screen are used. And a second projection mode for projecting an image.
According to a third aspect of the present invention, in the second aspect of the invention described above, the first projection mode is provided on the basis of a result detected by the detection unit. And the second projection mode. When switching to the first projection mode, the screen is adjusted so that it is in focus, and when switching to the second projection mode, the second projection mode is selected. The adjustment is made so that the projection surface is in focus.
The invention according to claim 4 is the invention according to claim 2 or 3, wherein the first content to be projected in the first projection mode and the second content to be projected in the second projection mode are provided. And focusing is adjusted according to the content to be projected.
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the back side of the screen is a half mirror or a control that transmits a part of the optical image and reflects a part of the optical image. An optical mirror is included.
The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the projection condition adjusted by the control unit is a focus position of a light image emitted from the projection unit, a projection optical path of the projection unit. The aperture state of the aperture stop disposed therein, the projection angle of view of the projection unit, the color of the light image emitted by the projection unit, the shape of the light image emitted by the projection unit, and the transmission / reflectance of the screen It is characterized by including at least one.
The invention according to claim 7 is the invention according to claim 6, further comprising a distance measuring unit that measures a distance to an object on which the light image reflected by the screen is projected, and the light emitted by the projection unit. The in-focus position of the image is set according to the distance measured by the distance measuring unit.
The invention according to claim 8 is the invention according to claim 7, further comprising an imaging unit having an automatic focusing function for photographing an object onto which the light image reflected by the screen is projected, The unit uses a distance to the photographing target obtained by the imaging unit by the automatic focusing function.
The invention according to claim 9 is the invention according to claim 8, wherein the control unit adjusts a shape of a light image emitted by the projection unit in accordance with a captured image of the imaging unit. .
The invention according to claim 10 is the invention according to any one of claims 1 to 9, further comprising a human detection unit that detects the presence or absence of a person approaching the apparatus, wherein the control unit is configured to detect the human detection unit. The projection condition is adjusted according to the detection output.
The invention according to claim 11 is the invention according to any one of claims 1 to 10, further comprising a standby power supply unit for supplying power to the apparatus at the time of a power failure, wherein the control unit The projection unit is operated using the electric power to adjust the projection condition.
The invention according to claim 12 is a projection method in an apparatus including a projection unit that emits a light image and a screen that transmits a part of the light image emitted from the projection unit and displays an image. And a control step of adjusting the projection conditions of the projection unit or the characteristics of the screen.
According to a thirteenth aspect of the present invention, a computer incorporated in an apparatus including a projection unit that emits an optical image and a screen that displays an image by transmitting a part of the optical image emitted from the projection unit is executed. A program that causes the computer to function as a control unit that adjusts projection conditions of the projection unit or characteristics of the screen.

10 ... signage device,
10A ... device housing,
11 ... Projection lens part,
12A, 12B ... Total reflection mirror,
13 ... light control mirror,
14 ... Screen,
15 ... Transparent board,
16 ... Photography lens part,
21 ... Memory card mounting part,
22 Projection image processing unit,
23 ... Micromirror element,
24 ... light source part,
25 ... Mirror,
26: Lens motor (M),
27 ... CMOS image sensor,
28 ... A / D converter,
29. Photographed image processing unit,
30 ... Lens motor (M),
31 ... CPU,
32 ... Main memory,
33 ... Program memory,
34 ... operation unit,
35 ... voice processing unit,
36 ... light control mirror drive unit,
37 ... Power control unit,
38 ... Spare battery part,
B1 to B3 ... operation buttons,
IA ... shooting optical axis,
LF: Projected luminous flux,
PE ... Pyroelectric sensor,
SB ... signage board,
SP ... Speaker unit WL ... Wall surface (behind).

Claims (13)

A projection unit for emitting a light image;
A screen that displays an image by transmitting a part of the light image emitted from the projection unit;
A projection apparatus comprising: a control unit that adjusts projection conditions of the projection unit or characteristics of the screen.   A first projection mode for projecting an image onto the screen; and a second projection mode for projecting an image onto a second projection surface that is reflected from the back side of the screen and is different from the screen. The projection apparatus according to claim 1. It has a detector that detects the presence or absence of people,
The control unit switches between the first projection mode and the second projection mode based on a result detected by the detection unit,
When the mode is switched to the first projection mode, the screen is adjusted so as to be in focus, and when the mode is switched to the second projection mode, the second projection plane is adjusted to be focused. The projection apparatus according to claim 2.   The first content to be projected in the first projection mode and the second content to be projected in the second projection mode, wherein the focus is adjusted according to the content to be projected. 4. The projection apparatus according to 2 or 3.   5. The projection apparatus according to claim 1, further comprising a half mirror or a dimming mirror that transmits a part of the optical image and reflects a part of the optical image on a rear surface side of the screen. .   The projection conditions adjusted by the control unit are the focus position of the light image emitted by the projection unit, the aperture state of the aperture stop arranged in the projection optical path of the projection unit, the projection field angle of the projection unit, and the projection 6. The projection apparatus according to claim 1, comprising at least one of a color of a light image emitted from the unit, a shape of a light image emitted from the projection unit, and a transmittance / reflectance of the screen. . A distance measuring unit for measuring a distance to a target on which the light image reflected by the screen is projected;
The projection apparatus according to claim 6, wherein a focus position of a light image emitted from the projection unit is set according to a distance measured by the distance measurement unit. An imaging unit having an automatic focusing function for capturing an object on which the light image reflected by the screen is projected;
The projection apparatus according to claim 7, wherein the distance measuring unit uses a distance to an imaging target obtained by the imaging unit using an automatic focusing function.   The projection apparatus according to claim 8, wherein the control unit adjusts a shape of a light image emitted from the projection unit according to a photographed image by the imaging unit. A human detection unit that detects the presence or absence of a person approaching the device;
The projection apparatus according to claim 1, wherein the control unit adjusts a projection condition according to a detection output of the human detection unit. A standby power supply for supplying power to the device in the event of a power failure;
The projection apparatus according to claim 1, wherein the control unit operates the projection unit using power from the standby power supply unit during a power failure to adjust the projection condition. A projection method in an apparatus comprising: a projection unit that emits a light image; and a screen that transmits a part of the light image emitted from the projection unit and displays an image,
A projection method comprising a control step of adjusting a projection condition of the projection unit or a characteristic of the screen. A program executed by a computer built in an apparatus having a projection unit that emits a light image and a screen that displays a part of the light image emitted from the projection unit and displays the image. ,
A program that functions as a control unit that adjusts projection conditions of the projection unit or characteristics of the screen.