JP2014098872A - Projection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow operation on a screen without inhibiting display of a projection image even without using a touch panel, so as to make a strong impression to a viewer.SOLUTION: A projection system comprises: a projection unit that radiates video light of an image; a screen unit that receives the video light radiated from the projection unit on a rear face side and projects the video light on a front face; and an optical sensor that is provided at a position on the rear face side of the screen unit and out of a projection range of the video light radiated from the projection unit. The optical sensor radiates light beams toward within the projection range projected on the screen unit.

Description

  The present invention relates to a projection system, and more particularly to a projection type projection system.

In recent years, a projection system that projects a human image onto a human-type screen and makes various notifications has been developed in order to make a notice impressed by a viewer (see, for example, Patent Document 1). In such a projection system, content programmed to some extent is repeatedly projected on a screen, and an administrator needs to operate a computer connected to the projector to change the display content.
A projection system is also known in which a mechanical switch for switching is arranged near the screen so that the viewer can change the display contents.

JP 2011-150221 A

By the way, in order to display the projected image without obstructing it, it is necessary to dispose the mechanical switch at a position off the screen. Also, considering the operability, it is desirable to arrange it near the screen. Furthermore, it is important for the screen to have a strong impression. If there is a mechanical switch in the vicinity of the screen, the impression is weakened.
Although it is conceivable to use a touch panel, if a touch panel that covers the entire screen is used, it is actually more expensive.
Therefore, an object of the present invention is to enhance the impression given to the viewer by enabling operation from the screen without obstructing the display of the projected image without using a touch panel.

In order to solve the above problems, according to one aspect of the present invention,
A projection unit that emits image light of the image;
A screen unit that receives the image light emitted from the projection unit on the back surface and projects the image light on the front surface;
An optical sensor disposed on the back side of the screen unit and at a position outside the projection range of the image light emitted from the projection unit,
A projection system is provided in which the optical sensor irradiates light within the projection range projected on the screen unit.

  According to the present invention, it is possible to perform an operation from the screen without obstructing the display of the projected image without using a touch panel, and the impression given to the viewer can be strengthened.

It is a block diagram which shows the main control structure of the projection system of this embodiment. It is explanatory drawing which shows an example of the person image displayed with a projection system. It is explanatory drawing which shows schematic structure of the screen part with which the projection system of FIG. 1 is equipped, (a) is a perspective view which shows the front side, (b) is a perspective view which shows the back side. It is a perspective view which shows the structure of the boundary vicinity of the upper body part and lower body part in the screen part of FIG. 3 from the back side. It is sectional drawing which shows the positional relationship of the optical sensor with which the screen part of FIG. 3 is provided, and another member.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a block diagram showing a main control configuration of the projection system of the present embodiment. As shown in FIG. 1, the projection system 1 includes a projection unit 2 that emits image light of a human image, and a human-type screen unit 3 that receives the image light emitted from the projection unit 2 on the back and projects it on the front surface. It has.

The projection unit 2 is connected to the content control unit 21 that controls each unit based on content data including images and sounds, and is connected to the content control unit 21, and converts the video data output from the content control unit 21 into video light. And a projector 22 for irradiating the screen unit 3.
The content control unit 21 stores Japanese content data, English content data, Chinese content data, and Korean content data.
Each content data includes video data and audio data corresponding to each language. Here, the video data is video data based on a person image G1 of only a person's upper body as shown in FIG. 2, for example. Note that marks m1, m2, m3, and m4 simulating the flags of Japan, the United States, China, and South Korea are arranged in order from the left in the lower part of the person image G1 so as to overlap the person image G1. The marks m1, m2, m3, and m4 indicate the language of each content with national flags in order to switch the content.

Next, the screen unit 3 will be described.
FIGS. 3A and 3B are explanatory views showing a schematic configuration of the screen unit 3, wherein FIG. 3A is a perspective view showing the front side, and FIG. 3B is a perspective view showing the back side.
As shown in FIG. 3, the screen part 3 is provided with an upper body part 4 on which the upper body of a person is displayed, a lower body part 5 on which the lower body is displayed, and a support part 6 for supporting them.
The upper body part 4 and the lower body part 5 are formed by a single translucent plate 7 such as an acrylic plate that is substantially orthogonal to the irradiation direction of the image light. A film screen 8 for rear projection is laminated on the rear surface of the translucent plate 7, and a film-like Fresnel lens 9 is laminated on the rear surface of the film screen 8 (see FIG. 5).
And while the external shape of the upper body part 4 is formed in a shape imitating the upper body of a person, the external shape of the lower body part 5 is formed in a rectangular shape. A sheet 51 on which a lower part (lower body image G2) that is not represented in the person image G1 projected by the projection unit 2 is drawn is attached to the front surface of the translucent plate 7 that forms the lower body part 5.
That is, in the lower body part 5, light from the back surface is blocked by the sheet 51 and is not transmitted to the front surface, but in the upper body part 4, light from the back surface can be transmitted forward. .

  The support portion 6 includes a pedestal 61 provided at the lower end portion of the lower body portion 5, a column portion 62 erected from the pedestal 61 so as to be along the vertical direction with respect to the rear central portion of the lower body portion 5, and the column portion 62 A holding plate 63 that is attached and holds the back surface of the lower body 5 is provided.

  FIG. 4 is a perspective view showing the structure near the boundary between the upper body 4 and the lower body 5 from the back side. As shown in FIG. 4, the sensor unit 10 is fixed to the upper end portion of the holding plate 63. The sensor unit 10 includes a sensor base 11 extending along the width direction and fixed to the holding plate 63, and four optical sensors arranged at a predetermined interval in the width direction with respect to the sensor base 11. 12 are provided. The optical sensor 12 is a non-contact sensor that detects the presence of an object in front of the irradiation direction of the optical sensor 12 when the optical sensor 12 irradiates light such as infrared rays and the light is blocked.

FIG. 5 is a cross-sectional view showing the positional relationship between the optical sensor 12 and other members. In FIG. 5, the alternate long and short dash line indicates the lower end of the irradiation range H when the projection unit 2 irradiates the image light. The irradiation range H indicates the range of the optical path of the image light from the projection unit 2 to the upper body 4. In addition, a range in which the image light is projected onto the screen unit 3 is set as a projection range, and the projection range is stored in the upper body part 4, and a lower part of the projection range is the lower body part 5.
The optical sensor 12 is held on the back side of the translucent plate 7 and below the projection range by a plate-shaped sensor holder 13 formed by bending. By this holding, the light beam L is emitted from the optical sensor 12 toward the projection range projected on the translucent plate 7. The film screen 8 and the Fresnel lens 9 are formed with openings 81 and 91 through which the optical path of the light beam L passes. Since the translucent plate 7 is arranged in front of the openings 81 and 91, the openings 81 and 91 are blocked by the translucent plate 7. The openings 81 and 91 are transmission parts according to the present invention. By forming the openings 81 and 91, the light beam L of the optical sensor 12 interferes and affects the detection result of the optical sensor 12. Is preventing. Further, when the tip of the optical sensor 12 is inserted into the openings 81 and 91, the installation space in the depth direction can be reduced. As a result, the optical sensor 12 irradiates the light beam L while avoiding the film screen 8 and the Fresnel lens 9.
In addition, the inclination α between the irradiation direction of the light beam L and the front surface of the translucent plate 7 is set at an angle that falls within a range of 20 degrees or more and 70 degrees or less in consideration of prevention of interference between the light beam L and other members. Preferably it is.
Moreover, it is preferable that the thickness of the translucent plate 7 is set larger than the beam diameter of the light beam L. For example, when the translucent plate 7 is thinner than the beam diameter of the light beam L, the light beam L does not fit in the radial direction in the translucent plate 7, so that part of the light is diffused or reflected. If this happens, a part of the light beam L interferes with other members, preventing accurate detection. On the other hand, when the translucent plate 7 is thicker than the beam diameter of the light beam L, the light beam L can be accommodated in the radial direction in the translucent plate 7, and diffusion and reflection of light can be suppressed. Thereby, the detection accuracy can be maintained.

  Note that the marks m1, m2, m3, and m4 below the person image G1 described above are respectively projected onto regions where the light beams L emitted from the four optical sensors 12 overlap the light transmitting plate 7. When the observer covers the front of each of the marks m1, m2, m3, and m4 with a hand or the like, the light L of the optical sensor 12 is blocked, and the optical sensor 12 outputs a detection signal.

As shown in FIG. 5, a cover 30 that covers the sensor unit 10 is provided behind the sensor unit 10. A sensor driver 31 that receives a detection signal from each optical sensor 12 is attached to the inner surface of the cover 30.
As shown in FIG. 1, the screen unit 3 is provided with an audio output unit 32 such as a speaker. The audio output unit 32 and the sensor driver 31 are connected to the content control unit 21 in a communicable manner.
The content control unit 21 controls the projector 22 and the audio output unit 32 based on the detection signal of each optical sensor 12 input via the sensor driver 31. For example, in the present embodiment, the language of the content is switched based on the detection signal of the optical sensor 12. For example, subtitles and clothes are switched in video data, and audio is switched in audio data.

Next, the operation of this embodiment will be described.
Usually, in Japan, the content control unit 21 controls the projector 22 and the audio output unit 32 based on Japanese content data. In FIG. 2, since the Japanese content data is being reproduced, the mark m1 imitating the Japanese flag is highlighted and the other marks m2, m3, and m4 are displayed lightly.
Thereafter, when a mark m2 imitating, for example, a US flag is covered by an observer, the optical sensor 12 corresponding to the covered mark m2 outputs a detection signal to the sensor driver 31. When a detection signal is input from the sensor driver 31 to the content control unit 21, the content control unit 21 controls the projector 22 and the audio output unit 32 based on the English content data. As a result, the video and audio are switched to the English version.

As described above, according to the present embodiment, since the optical path of the light beam L passes through the openings 81 and 91 formed in the film screen 8 and the Fresnel lens 9, the light beam L is transmitted by the film screen 8 and the Fresnel lens 9. Refraction and diffusion are prevented. For this reason, it is possible to irradiate the intended region with the light beam L of the optical sensor 12.
And since the optical sensor 12 is irradiating the light ray L into the projection range projected on the translucent plate 7 through these openings 81 and 91, on the image projected without using a touch panel. An operation area can be arranged in the area.
Therefore, the operation from the screen unit 3 can be performed without hindering the display of the projected image without using the touch panel, and the impression given to the viewer can be strengthened.

  In addition, since the sheet 51 on which the lower part (lower body image G2) not represented in the human image G1 projected by the projection unit 2 is drawn is pasted directly below the projection range on the front surface of the translucent plate 7, With this sheet 51, the optical sensor 12 arranged below the projection range is hidden. Therefore, the viewer can see the person composed of the person image G1 and the lower body image G2, and can give the impression that only the person exists there.

  In addition, since the translucent plate 7 is thicker than the beam diameter of the light beam L irradiated by the optical sensor 12, the light beam L can be accommodated in the radial direction in the translucent plate 7, and the diffusion and reflection of light are suppressed. can do. Thereby, the detection accuracy can be maintained.

  Further, since the marks m1, m2, m3, and m4 indicating the operation contents are superimposed on the person image G1 in the region where the light beam L irradiated by the optical sensor 12 and the light transmitting plate 7 overlap, together with the operation contents The operation position can be presented to the observer.

Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the above-described embodiment, the configuration in which the optical sensor 12 is hidden by the sheet 51 on which the lower-body image G2 is drawn has been described as an example. Also good.
Further, in the present embodiment, the case where “language switching” is indicated by the marks m1, m2, m3, and m4 imitating national flags of each country as the operation content is illustrated, but other operations are performed by the optical sensor 12. When performing, it is preferable to use a mark whose operation content can be intuitively understood.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A projection unit that emits image light of the image;
A screen unit that receives the image light emitted from the projection unit on the back surface and projects the image light on the front surface;
An optical sensor disposed on the back side of the screen unit and at a position outside the projection range of the image light emitted from the projection unit,
The projection system according to claim 1, wherein the optical sensor irradiates light within the projection range projected onto the screen unit.
<Claim 2>
The projection system of claim 1, wherein
The screen portion is
A plate-shaped translucent plate;
A film screen laminated on the back side of the translucent plate;
A projection system comprising: a film-like Fresnel lens laminated on a back side of the film screen.
<Claim 3>
The projection system of claim 1, wherein
The projection system according to claim 1, wherein a thickness of the light transmitting plate is set to be thicker than a beam diameter of a light beam irradiated by the optical sensor.
<Claim 4>
The projection system according to claim 2 or 3,
The projection system, wherein the screen unit includes a transmission unit that transmits a light beam irradiated by the optical sensor.
<Claim 5>
The projection system according to claim 4, wherein
The projection system, wherein the transmission unit is an opening formed in the film screen and the Fresnel lens through which the light path passes.
<Claim 6>
The projection system according to claim 5, wherein
The projection system, wherein the light transmissive plate closes the opening.
<Claim 7>
In the projection system according to any one of claims 1 to 6,
The optical sensor is disposed below the projection range,
A projection system in which a sheet on which a lower portion not represented in the person image projected by the projection unit is drawn is pasted immediately below the projection range on the front surface of the light transmission plate .
<Claim 8>
In the projection system according to any one of claims 1 to 7,
The projection system projects a mark indicating the operation content on the image so as to be superimposed on a region where the light beam irradiated by the optical sensor and the screen unit overlap.
<Claim 9>
A projection unit that emits image light of the image;
A screen unit for receiving the image light emitted from the projection unit on the back and projecting it on the front;
The screen portion is
A plate-shaped translucent plate;
A film screen laminated on the back side of the translucent plate;
A film-like Fresnel lens laminated on the back side of the film screen;
A projection system comprising: an optical sensor that is disposed on a back side of the screen portion and that emits light rays while avoiding the Fresnel lens and the film screen.

DESCRIPTION OF SYMBOLS 1 Projection system 2 Projection part 3 Screen part 4 Upper body part (projection range)
6 Supporting part 7 Translucent plate 8 Film screen 9 Fresnel lens 12 Optical sensor 21 Content control part 22 Projector 51 Sheet 81 Opening (transmission part)
91 Opening (transmission part)
G1 Portrait image G2 Lower body image H Irradiation range L Ray m1, m2, m3, m4 mark

Claims (9)

A projection unit that emits image light of the image;
A screen unit that receives the image light emitted from the projection unit on the back surface and projects the image light on the front surface;
An optical sensor disposed on the back side of the screen unit and at a position outside the projection range of the image light emitted from the projection unit,
The projection system according to claim 1, wherein the optical sensor irradiates light within the projection range projected onto the screen unit. The projection system of claim 1, wherein
The screen portion is
A plate-shaped translucent plate;
A film screen laminated on the back side of the translucent plate;
A projection system comprising: a film-like Fresnel lens laminated on a back side of the film screen. The projection system of claim 1, wherein
The projection system according to claim 1, wherein a thickness of the light transmitting plate is set to be thicker than a beam diameter of a light beam irradiated by the optical sensor. The projection system according to claim 2 or 3,
The projection system, wherein the screen unit includes a transmission unit that transmits a light beam irradiated by the optical sensor. The projection system according to claim 4, wherein
The projection system, wherein the transmission unit is an opening formed in the film screen and the Fresnel lens through which the light path passes. The projection system according to claim 5, wherein
The projection system, wherein the light transmissive plate closes the opening. In the projection system according to any one of claims 1 to 6,
The optical sensor is disposed below the projection range,
A projection system in which a sheet on which a lower portion not represented in the person image projected by the projection unit is drawn is pasted immediately below the projection range on the front surface of the light transmission plate . In the projection system according to any one of claims 1 to 7,
The projection system projects a mark indicating the operation content on the image so as to be superimposed on a region where the light beam irradiated by the optical sensor and the screen unit overlap. A projection unit that emits image light of the image;
A screen unit for receiving the image light emitted from the projection unit on the back and projecting it on the front;
The screen portion is
A plate-shaped translucent plate;
A film screen laminated on the back side of the translucent plate;
A film-like Fresnel lens laminated on the back side of the film screen;
A projection system comprising: an optical sensor that is disposed on a back side of the screen portion and that emits light rays while avoiding the Fresnel lens and the film screen.

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