JP2013205542A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of displaying suitable images.SOLUTION: An image display device 1 of the present invention includes: a screen 20 that covers a part of an outer face of a housing 11; an external light transmission area 20 that is provided on an outer periphery of the screen 20 on the outer face, and is capable of photographing an external state from the inside; an image projecting device 30 that is arranged inside the housing 11, and projects an image on the screen 20 from an inner surface side; and an imaging device 40 that is capable of photographing the inner surface side and the external light transmission area 20 of the screen 20.

Description

  The present invention relates to an image display device.

  2. Description of the Related Art Conventionally, as an image display device, one in which an operator directly touches a screen on which an image is displayed to perform various operations (see Patent Document 1). In such an image display device, a camera that shoots the screen from the back side is arranged inside the housing of the display device, and when the finger touches the screen, the light reflected by the finger is shot by the camera, The finger position is specified.

JP 2007-11276 A

  An object of the present invention is to provide an image display device capable of displaying a suitable image.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

The invention according to claim 1 is provided on the outer periphery of the screen (20, 220, 320) covering a part of the outer surface of the housing (11) and the screen (20, 220, 320) on the outer surface. An external light transmission area (20, 220, 320) capable of photographing the external state from the inside, and the inside of the housing (11), and projecting an image from the inner surface to the screen (20, 220, 320) Image projection device (30, 330), and photographing devices (40, 240, 340) capable of photographing the inner surface side of the screen (20, 220, 320) and the external light transmission region (20, 220, 320). And an image display device (1, 2, 3).
The invention described in claim 2 is the image display device (1, 2, 3) according to claim 1, wherein the external light transmission region (20) photographed by the photographing device (40, 240, 340). , 220, 320), and a control unit (60, 61) for determining a projection state of the image on the screen (20, 220, 320) according to the image on the screen (20, 220, 320). 1, 2, 3).
The invention according to claim 3 is the image display device (1, 2, 3) according to claim 2, wherein the projection state is the screen (20, 220) by the image projection device (30, 330). , 320) is an on-off projection of the image onto the image display device (1, 2, 3).
The invention according to claim 4 is the image display device (1, 2, 3) according to claim 3, wherein the projection state is the screen (20, 220) by the image projection device (30, 330). , 320) is an image display device (1, 2, 3) characterized in that it is the content of the image projected onto the screen.
A fifth aspect of the present invention is the image display device (2, 3) according to any one of the first to fourth aspects, wherein the photographing device is provided in the external light transmission region (220, 320). The image display device (2, 3) is characterized in that an optical system (222, 322) having power with respect to (240, 340) is arranged.
The invention according to claim 6 is the image display device (2, 3) according to any one of claims 1 to 5, wherein the screen is a light guide plate (220, 320), and the light guide plate ( 220, 320) includes a first light source (202, 302) for entering light into the light guide plate (220, 320) disposed on a side surface of the light guide plate (220, 320). The first light source (202, 302) has a wavelength selection function capable of preferentially photographing the light wavelength of the light source (202, 302), and the first light source (202, 302) when an object contacts the light guide plate (220, 320). 302), it is possible to identify the contact position of the object by photographing the light reflected from the contacted object, which is incident on the light guide plate (220, 320). Image display device (1, 2, 3).
The invention according to claim 7 is the image display device (1, 2, 3) according to any one of claims 1 to 6, wherein the outside of the external light transmission region (20, 220, 320). The image display device (1, 2, 3) is characterized by comprising a second light source (203, 303).
The invention according to claim 8 is the image display device (3) according to any one of claims 1 to 5, wherein the screen (320) is a light guide plate (320), and the light guide plate ( 320) and a second light source (303) for illuminating the outside of the external light transmission region (320). And a control unit (60, 61) for controlling light emission of the first light source (302) and the second light source (, 303), and the photographing device (340) includes a first light source (340). 302) has a wavelength selection function capable of preferentially photographing the wavelength of light, and enters an object from the first light source (302) when an object comes into contact with the light guide plate (320). 320) photographing light reflected from the contacted object. The contact position of the object can be specified, and the control unit (60, 61) alternately turns on the first light source (302) and the second light source (303), and the imaging device ( 340) alternately taking an image when the first light source (302) is lit and an image when the second light source (303) is lit, corresponding to the lighting cycle, An image display device (3) characterized by
Note that the configuration described with reference numerals may be modified as appropriate, and at least a part of the configuration may be replaced with another component.

  ADVANTAGE OF THE INVENTION According to this invention, the image display apparatus which can display a suitable image can be provided.

It is a figure which shows the image display apparatus of 1st Embodiment of this invention. It is an example of the image image | photographed with the camera of 1st Embodiment. An example of an image displayed on a screen is shown. It is a figure which shows the image display apparatus of 2nd Embodiment of this invention. It is an example of the image image | photographed with the camera of 2nd Embodiment. It is a figure which shows the image display apparatus of 3rd Embodiment. (A) is an image photographed when the screen is illuminated by the screen LED, and (b) is an image photographed when the outside is illuminated by the external LED.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an image display device 1 according to the first embodiment of the present invention. In this specification, an image means an image including not only a still image but also a moving image.

The image display device 1 includes a display unit 10 and a control unit 60.
The display unit 10 includes a casing 11 having a substantially rectangular parallelepiped shape as a whole and a screen 20 disposed on the upper surface of the casing 11. A projector 30 and a camera 40 are disposed inside the housing 11.

  The screen 20 is disposed so as to cover the upper surface of the housing 11, and a window portion 21, which is an external light transmission region capable of photographing an external state from the inside, is provided on the outer peripheral portion thereof. The screen 20 is formed with a predetermined thickness using a material that can transmit visible light, such as transparent acrylic or polycarbonate.

A diffusion plate 20a is attached to the projector 30 side of the screen 20, and an image is projected from the projector 30 onto the diffusion plate 20a. The projection image is diffused by the diffusion plate 20a and projected from the outer surface side of the screen 20. The image can be observed.
Moreover, the window part 21 is provided in the outer peripheral part of the screen 20 as mentioned above. In the present embodiment, the window portion 21 is provided with a transparent member such as glass.

Although not shown in detail, the projector 30 includes a projection light source, an image translucent display unit, and an optical system. The projector 30 is disposed at a predetermined position inside the housing 11 so as to project image light toward the screen 20. It is arranged.
The projector 30 projects image light input from a control unit 60 (image processing device 62), which will be described later, onto the screen 20.

Although not shown in detail, the camera 40 includes an imaging optical system, a light receiving element, and the like. The camera 40 is disposed at a predetermined position inside the housing 11 and can acquire an image of an area including the screen 20 and the window portion 21. It has become.
FIG. 2 is an example of an image taken by the camera 40. Since the external state can be observed through the window portion 21 as described above, for example, when the operator S approaches the outside of the window portion 21, the operator S passes through the window portion 21 to an image photographed by the camera 40. Is reflected.

The control unit 60 performs overall control of the image display apparatus 1 and is connected to the display unit 10.
The control unit 60 is, for example, a personal computer that includes a CPU 61, an image processing device 62, a memory 63, a storage 66, and the like.

The image processing device 62 inputs a photographed image of the camera 40 and analyzes it. For example, the presence / absence of the operator S in the window 21 is determined and the contact position on the screen 20 is analyzed. Then, the image processing device 62 outputs these determination results and analysis results to the CPU 61.
The CPU 61 performs display of the image information stored in the storage 66 on the screen 20 and various processes according to the contact position based on the determination information input from the image processing device 62.
The memory 63 stores a program for operating the CPU 61.
The storage 66 stores image information to be displayed on the screen 20.

Next, the operation of this embodiment will be described.
The camera 40 configured as described above starts photographing the screen 20 and the window portion 21 when a main switch (not shown) of the image display device 1 is turned on.
When the operator S approaches the screen 20 and comes to a position where the camera 40 can shoot through the window 21, an image of the operator S is taken by the camera 40.

An image photographed by the camera 40 is transmitted to the image processing device 62.
The image processing device 62 inputs and analyzes an image captured by the camera 40 and determines whether or not the operator S exists in the window portion 21. The image processing device 62 outputs the created determination information to the CPU 61.
Here, the image processing device 62 may determine gender, age, and the like based not only on the presence / absence of the operator S in the window portion 21 but also based on, for example, the photographed face.
Further, the image processing device 62 may analyze the position of the operator S in the window portion 21 and the number of people.

  When the operator S is detected based on the determination information input from the image processing device 62, the CPU 61 drives the CPU 61 according to the program stored in the memory 63 to transfer the image information stored in the storage 66 to the image processing device. Processing is performed at 62 and output to the projector 30, and is displayed on the screen 20 via the projector 30.

  FIG. 3 shows an example of an image displayed on the screen 20. As shown in FIG. 3A, when the operator S approaches, an image is displayed on the screen 20.

  Here, when the image processing device 62 determines the number, position, sex, age, and the like of the operator S, the CPU 61 can also change the content of the image according to the sex and age of the operator S. In this case, it is possible to display images according to the needs that differ depending on the sex and age of the operator S.

  FIG. 3B shows an example displayed on the screen 20 when a plurality of operators S of different age groups exist at the facing position of the screen 20. As shown, the screen 20 is divided according to the number of operators S. And the display according to the age of the operator S is made, respectively.

  FIG. 3C shows an example displayed on the screen 20 when a plurality of operators S having different genders are biased on the screen 20. As shown in the figure, the screen 20 is divided into the side where the operator S is present and the side where the operator S is not present, and the side where the operator S is present is further divided according to the number of operators S. Then, on the side of the screen 20 where the operator S is present, an image adapted to, for example, gender of each operator S is displayed. On the side where the operator S does not exist, the image is not projected onto the screen 20.

When an image is displayed on the screen 20 and the operator S touches the screen 20 with, for example, a finger, the position is illuminated with the projection light of the projector 30 and the camera 40 appears bright. The image processing device 62 inputs a photographed image of the camera 40, analyzes the contact position and the like, and outputs it to the CPU 61.
The CPU 61 performs processing according to the contact position, for example, changes an image displayed by the projector according to the contact position, outputs the image to the projector 30 via the image processing device 62, and causes the screen 20 to display.

As described above, this embodiment has the following effects.
(1) According to the present embodiment, an image can be displayed on the screen 20 only when the operator S approaches the screen 20. Accordingly, when the operator S is not present around the screen 20 and display of an image is unnecessary, the display of the image on the screen 20 is not performed, so that power consumption can be reduced.

(2) When the image processing device 62 determines the gender and age of the operator S based on the face in the photographed image, the CPU 61 determines the contents of the image according to the gender and age of the operator S. Since it can be changed, an image according to the needs of the operator S can be displayed.

(3) Further, when the number and position of the operator S are detected, the CPU 61 divides the display screen of the screen 20 into the projector 30 via the image processing device 62 in accordance with the number and position of the operator S. When displayed, an image according to the needs of each operator S can be displayed.

(4) Further, it is possible to display an image only on the screen 20 in the direction in which the operator S exists. In this case, power consumption can be reduced because the display of a portion that does not require image display is not performed.
(5) Moreover, since glass is arrange | positioned at the window part 21, the approach into the housing | casing 11 of foreign materials, such as dust, is prevented.

(Second Embodiment)
Next, a second embodiment of the present invention shown in FIG. 4 will be described.
FIG. 4 is a conceptual configuration diagram of the image display device 2 according to the second embodiment of the present invention.
The basic configuration of the image display device 2 in the second embodiment is the same as that of the image display device 1 in the first embodiment described above, and the same components are denoted by the same reference numerals and description thereof is omitted.

The difference from the first embodiment is that a concave lens 222 is arranged in the window portion 221. As a result, the camera 240 can focus on both the position of the diffusion plate 220a on the back surface of the screen 220 and the outside of the window portion 221 that is farther than the screen 220. It is possible to acquire a simple image.
Furthermore, by providing the lens 222, the angle of view is widened, and a wider external situation can be photographed.

  In the present embodiment, unlike the first embodiment, the screen 220 is a light guide plate. A screen infrared LED 202 that emits infrared light and irradiates the screen 220 with infrared light is provided. The infrared LED for screen 202 irradiates infrared rays from the side end face of the screen 220. The infrared light irradiated inside the screen 220 by the screen infrared LED 202 repeats total reflection on the inner and outer surfaces of the screen 220 and reaches the opposite side surface.

The camera 240 is a so-called infrared camera having an infrared selection function capable of preferentially photographing infrared wavelengths.
When an operator S's finger, for example, comes into contact with the screen 220, infrared light is scattered, and the infrared camera 240 captures the scattering. That is, when a finger or the like comes into contact with the outer surface of the screen 220, the reflected light path of the infrared light inside the screen 220 is disturbed at the contact portion, and the infrared light leaks out to the inner surface side of the screen 220. The camera 240 images the infrared light leaked to the inner surface side of the screen 220.

In the present embodiment, an external infrared LED 203 that illuminates the outside of the window portion 221 is further provided. The external infrared LED 203 irradiates infrared rays to a region that can be photographed by the camera 240 outside the housing 11.
Similarly to the first embodiment, when the operator S tries to operate the screen 220 and comes to a position where the camera 240 takes a picture through the window 221, an image of the operator S is taken by the camera 240.
FIG. 5 is an example of an image photographed by the camera 240. Since the external state can be observed through the window part 221 as described above, for example, when the operator S approaches the outside of the window part 221, an image taken by the camera 240 is displayed on the operator S through the window part 221. Is reflected.
At this time, since infrared rays are irradiated in the present embodiment, even when the outside is dark, the infrared camera 240 can capture the reflected light of the infrared rays and obtain a clearer image.

As described above, according to this embodiment, in addition to the effects of the first embodiment, the following effects are obtained.
(1) Since the concave lens 222 is disposed in the window portion 221, the camera 240 focuses on both the position of the diffusion plate 220 a on the back surface of the screen 220 and the outside of the window portion 221 farther away than the screen 220. This makes it possible to obtain a finer image outside the window 221. Furthermore, by providing the lens 222, the angle of view is widened, and a wider external situation can be photographed.
(2) Since infrared rays are emitted from the external infrared LED 203 toward the outside, the camera 240 can easily catch the reflected infrared rays even when the outside is dark. Therefore, a clear image can be captured, and the human recognition system is enhanced.
(3) Further, the screen 220 is irradiated with infrared rays from the infrared LED 202 for the screen, and the infrared camera 240 images the leaked infrared light to the inner surface side of the screen 220 at the contact portion such as a finger. The position can be extracted.
(4) Further, an inverted Galileo optical system may be used for the concave lens 222.

(Third embodiment)
FIG. 6 is a diagram showing an image display device 3 according to the third embodiment. The basic configuration of the image display device 2 in the third embodiment is the same as that of the image display device 2 in the second embodiment described above, and the same components are denoted by the same reference numerals and description thereof is omitted.

The third embodiment differs from the second embodiment in that the screen 320 has a curved surface and an image is projected through the fisheye lens 351.
Further, by using the common optical system of the camera 340 and the optical system of the projector 330 as a common projection light receiving optical system 350, the number of parts can be reduced and the cost can be reduced. The positional relationship is simplified.

Next, this embodiment will be described in detail.
The screen 320 of this embodiment is formed in a hollow hemispherical shape with a predetermined plate thickness.
The projection light receiving optical system 350 includes a lens 351 that is a fisheye lens having an angle of view of approximately 180 °, and the entire area of the screen 320 is disposed within the angle of view.
The projection light receiving optical system 350 is disposed substantially at the center of the hemispherical screen 320 so as to project image light toward the screen 320. The projection light receiving optical system 350 projects image light of image information input from the control unit 60 (image processing device 62) onto the screen 320.

Further, in the present embodiment, as in the second embodiment, the screen 320 is a light guide plate, and a screen LED 302 that irradiates detection light is disposed from a side end surface of the screen 320. An external LED 303 that illuminates the outside is also arranged.
The screen LED 302 and the external LED 303 are connected to an LED controller 310 provided in the control unit 60. The LED controller 310 alternately turns on and off the screen LEDs 302 and the external LEDs 303.

The display unit 300 further includes a camera 340 and a dichroic mirror 341.
The dichroic mirror 341 is a reflecting mirror having a frequency characteristic that reflects only the detection light having a specific wavelength (reflected light by the light from the screen LED 302 and the external 303) and transmits other light.
The dichroic mirror 341 is interposed in the optical path between the projector 330 and the projection light receiving optical system 350 in the projection light receiving optical system 350 at a predetermined angle with respect to the optical path.
The camera 340 is disposed so as to be able to detect detection light derived from light generated by the screen LED 302 that is incident from the projection light receiving optical system 350 and reflected by the dichroic mirror 341.

The camera 340 performs shooting in synchronization with ON / OFF of the screen LED 302 and the external LED 303 by the LED controller 310 described above.
FIG. 7A is an image of the camera 340 taken when the screen 320 is illuminated by the screen LED 302, and FIG. 7B is an illustration of the exterior of the concave lens 322 being illuminated by the external LED 303. It is an image of the camera 340 photographed at times. They are an image when the operator S touches the screen 320 (FIG. 7A) and a photographed image of the camera when the operator S exists in the window 321 (FIG. 7B).
As shown in the drawing, only information on the screen 320 is detected in the image of the camera 340 (FIG. 7A) taken when light is guided into the screen 320 by the screen LED 302. Further, only the image of the window portion 321 is detected in the image of the camera 340 (FIG. 7B) taken when the outside of the concave lens 322 is illuminated by the external LED 303.

As described above, this embodiment has the following effects.
(1) The camera 340 performs imaging in synchronization with ON / OFF switching between the screen LED 302 and the external LED 303 by the LED controller 310 described above. Therefore, an image obtained by guiding light to the screen 320 and an image illuminated outside can be acquired separately.
According to this, it is possible to take a difference between the image illuminated by the screen LED 302 and the image when the external LED 303 is illuminated, and the screen is more reliably contacted by eliminating the influence of disturbance light. The finger and the external situation can be acquired with certainty. Furthermore, since it is not necessary to separate both from one image, the image processing can be simplified.

(2) Further, when only the external LED 303 is used and no person is detected outside, it is determined that no one is watching or operating, and the projector 330 and the screen LED 302 are turned off. This makes it possible to save power.
In addition, since the projection light receiving optical system 350 is shared by the camera 340 and the projector 330, the entire configuration can be made compact, and image distortion correction is unnecessary or easy.

(Deformation)
The present invention is not limited to the above-described embodiment, and various modifications and changes as described below are possible, and these are also within the scope of the present invention.
(1) Although 1st Embodiment demonstrated the example by which the glass is arrange | positioned at the window part 21, it is not limited to this, For example, another translucent member may be arrange | positioned and nothing is arrange | positioned. There may be no gap.
(2) In the second embodiment and the second embodiment, the concave lenses 222 and 322 are arranged in the window portions 221 and 321, but the present invention is not limited to this, and a convex lens may be used.
(3) In this embodiment, the camera that shoots the screen and the camera that shoots the window portion are one camera, but different cameras may be used.
In addition, although embodiment and a deformation | transformation form can also be used in combination as appropriate, detailed description is abbreviate | omitted. Further, the present invention is not limited to the embodiment described above.

  1, 2, 3: Image display device, 10, 200, 300: Display unit, 11: Housing, 20, 220, 320: Screen, 20a, 220a: Diffusion plate, 21, 221, 321: Window unit, 30, 330: projector, 40, 240, 340: camera, 60: control unit, 61: CPU, 62: image processing device, 202: infrared LED for screen, 203: infrared LED for external use, 222, 322: concave lens, 302 : LED for screen, 303: LED for external use, 310: LED controller, 341: Dichroic mirror, 350: Projection light receiving optical system, 351: Fisheye lens, S: Operator

Claims (8)

A screen covering a part of the outer surface of the housing;
An external light transmission region provided on an outer peripheral portion of the screen on the outer surface, and capable of photographing an external state from the inside;
An image projecting device disposed inside the housing and projecting an image from the inner surface to the screen;
A photographing device capable of photographing the inner surface side of the screen and the external light transmission region;
An image display device characterized by the above. The image display device according to claim 1,
A control unit that determines a projection state of the image on the screen according to an image of the external light transmission region photographed by the photographing device;
An image display device characterized by the above. The image display device according to claim 2,
The projection state is on / off of projection of an image onto the screen by the image projection device;
An image display device characterized by the above. The image display device according to claim 3,
The projection state is the content of an image projected onto the screen by the image projection device;
An image display device characterized by the above. The image display device according to any one of claims 1 to 4,
An optical system having power with respect to the photographing apparatus is disposed in the external light transmission region;
An image display device characterized by the above. The image display device according to any one of claims 1 to 5,
The screen is a light guide plate;
A first light source for entering light into the light guide plate disposed on a side surface of the light guide plate;
The imaging apparatus has a wavelength selection function capable of preferentially imaging the wavelength of light of the first light source, and enters the light guide plate from the first light source when an object contacts the light guide plate. It is possible to identify the contact position of the object by photographing light reflected from the contacted object.
An image display device characterized by the above. The image display device according to any one of claims 1 to 6,
Comprising a second light source for illuminating the outside of the external light transmission region;
An image display device characterized by the above. The image display device according to any one of claims 1 to 5,
The screen is a light guide plate;
A first light source that enters light inside the light guide plate disposed on a side surface of the light guide plate;
A second light source that illuminates the outside of the external light transmission region;
A control unit for controlling light emission of the first light source and the second light source;
With
The imaging apparatus has a wavelength selection function capable of preferentially imaging the wavelength of light of the first light source, and enters the light guide plate from the first light source when an object contacts the light guide plate. By capturing the light reflected from the contacted object with the light propagating through the inside, the contact position of the object can be specified,
The control unit alternately turns on the first light source and the second light source,
The imaging device alternately captures an image when the first light source is lit and an image when the second light source is lit corresponding to the lighting cycle;
An image display device characterized by the above.

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