JP2009130804A - Display and imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display and imaging device which can display an operator on the other side of the line while keeping eye contact with the operator and which can be easily assembled into a housing of a mobile telephone. <P>SOLUTION: A polarization beam splitter 8, a liquid crystal panel 11, a CCD imaging element 9, and a projection lens 12 are stored in a main body portion 3b of a housing 3 of a mobile telephone 2, while a photoconductor 13 and a hologram screen 14 are stored in a lid portion 3c. An image of an operator on the other side of the line, which is displayed on the liquid crystal panel 11, is enlarged by means of the projection lens 12 via the polarization beam splitter 8 and then is projected on the hologram screen 14. The hologram screen 14 generates a virtual image B of the operator on the other side of the line at the end of the gaze S of a self operator A. The light (image) from the self operator A side is condensed by means of the hologram screen 14, and is imaged by the CCD imaging element 9 after passing through the projection lens 12 and the polarization beam splitter 8 in the reverse direction from the one in projection and is sent to the other party's mobile phone by means of a wireless communication means 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display and imaging apparatus capable of displaying an image in a state in which the user's operator and the partner operator's line of sight match each other.

  2. Description of the Related Art Conventionally, a so-called videophone device that can transmit images and sounds in both directions is known, and display imaging in which an image of the partner operator is displayed in a state where the line of sight of the operator and the partner operator is mutually aligned An apparatus is also known (see, for example, Patent Document 1).

Also, by adopting a hologram element as a small display provided in a mobile phone, a virtual image is formed on the back side of the hologram element, even when the mobile phone is used close to the face for conversation, A portable information device that allows an operator to easily view an image on a display is known (for example, see Patent Document 2).
JP 2000-56226 A JP 2001-308997 A

  The display and imaging apparatus described in Patent Document 1 has an advantage that high-quality communication can be easily achieved because the operator and the partner operator can talk with each other while keeping their eyes on each other. Since the free-form curved prism for condensing the light from the operator's side and transmitting it to the CCD image sensor is relatively large and bulky while enlarging the image on the partner operator's side emitted from the There is a problem that it is not easy to incorporate the display imaging device into the housing of the mobile phone.

  On the other hand, Patent Document 2 does not disclose a configuration for displaying an image on the partner operator side in a state where the line of sight matches.

  Therefore, the present invention is a display and imaging device that can display an image of the partner operator in a state where the line of sight of the operator and the partner operator are coincident with each other, and can be easily incorporated into the casing of the mobile phone. An object is to provide a display imaging device.

  In order to achieve the above object, the invention according to claim 1 is a display imaging apparatus capable of displaying an image of the partner operator in a state where the line of sight of the operator and the partner operator are matched with each other. Image display means for displaying the image on the screen, projection means for enlarging and projecting the image displayed by the image display means, and the image of the other operator projected by the projection means as a virtual image A holographic screen that can be displayed; an imaging unit that is focused by the holographic screen and that captures a reduced image of the operator formed through the projection unit in a direction opposite to the direction of projection; and the image display unit The image of the other operator exiting from the hologram screen to the projection means, and the projection means from the hologram screen Through it, characterized in that it comprises an image separation means for separating the image of the local operator enters into the imaging unit.

  According to a second aspect of the present invention, in the display / imaging apparatus according to the first aspect, the image display means, the projection means, the hologram screen, the imaging means, and the image separation means are stored in a casing of a mobile phone. It is characterized by that.

  According to a third aspect of the present invention, in the display / imaging apparatus according to the second aspect, the image of the partner operator displayed by the image display means is an image received by the communication means of the mobile phone and is captured by the imaging means. The self-operator image is transmitted by the communication means of the mobile phone.

  According to a fourth aspect of the present invention, in the display / imaging device according to the second or third aspect, the hologram screen is a transmissive type capable of seeing through the back surface.

  According to the first aspect of the present invention, the image of the partner operator is displayed as a virtual image by the hologram screen and the light from the operator side is condensed, so that the entire apparatus is not bulky and is relatively flat. It is possible to have a similar configuration, so that the operator can view the image of the partner operator in a state where the line of sight is matched, and can be easily incorporated into the casing of the mobile phone.

  According to the invention of claim 4, the self-operator can visually recognize the partner operator and can see the back side of the hologram screen, and can obtain much information.

  A display imaging apparatus according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the display / imaging device 1 of this embodiment is incorporated in a housing 3 of a mobile phone 2 and is configured as a part of a device that realizes a videophone function of the mobile phone 2. The housing 3 includes a main body portion 3b and a lid portion 3c that are configured to be foldable around a central hinge portion 3a.

  In the main body 3b, a microphone 4, wireless communication means 5 for transmitting the sound collected by the microphone 4, operation keys (not shown) such as a numeric keypad, various lamps (not shown) indicating operation states, etc. And a speaker 6 for outputting the sound received by the wireless communication means 5 is housed in the lid 3c. The wireless communication means 5 can be connected to a hands-free earphone microphone 7 via a terminal (not shown) provided on the side surface of the main body 3b. By wearing the earphone microphone 7, the mobile phone 2 can be operated at a predetermined distance from the operator A itself.

  The display imaging device 1 of the present embodiment includes a horizontally-long rectangular beam splitter 8 (image separation means) stored in the main body 3b, and a CCD image sensor 9 (fixed to the end face on the longitudinal side of the polarization beam splitter 8). Imaging means), a small liquid crystal panel 11 (image display means) fixed to the side surface of the polarizing beam splitter 8, a projection lens 12 (projection means), a light guide 13 stored in the lid 3c, and a hologram A screen 14 is provided. The hologram screen 14 is formed in a thin plate shape, and is fitted and provided in a window hole 15 that is opened so as to penetrate the lid portion 3c back and forth.

  As the polarization beam splitter 8, one that reflects the S-polarized light Ls by the reflecting layer 8a and changes the traveling direction by 90 degrees, and the P-polarized light Lp that passes through the reflecting layer 8a without changing the traveling direction is adopted.

  The small liquid crystal panel 11 is suitable for display of images in a field sequential manner by a driver (not shown) (for example, FLC: Ferroelectric Liquid Crystal, OCB: Optically Compensated Birefringence). The image from the telephone (image information of the partner operator) is displayed as a video. In the small liquid crystal panel 11, the polarization direction of the liquid crystal emits only S-polarized light Ls. Further, instead of the small liquid crystal panel 11, a display device that generates an image by an optical scanning device using a polygon mirror may be used.

  The projection lens 12 is a convex lens that magnifies and projects the image emitted from the end face of the polarization beam splitter 8 onto the light guide 13. In the mobile phone 2 of the present embodiment, the projection lens 12 is provided at a position where light is emitted outward at the end of the main body 3b, and the light guide 13 is provided on the lid 3c side. Therefore, the light (image) emitted from the projection lens 12 is approximately with respect to the end face of the light guide 13 only when the opening angle of the lid 3c with respect to the main body 3b is the predetermined angle shown in FIG. It crosses at right angles and enters the light guide 13.

  The light guide 13 is molded from a transparent resin such as acrylic, and transmits light (image) incident from the projection lens 12 forward while being totally reflected by the outer peripheral surface of the light guide 13. The light is emitted from the side end surface toward the hologram screen 14 at a predetermined angle.

  The hologram screen 14 is created as a Lippmann hologram having light transparency and a limited observation area. Specifically, the hologram screen 14 receives an image (light) emitted from the light guide 13 at a predetermined angle, and is visible only to the operator A who is in the region Z shown in FIG. Thus, a virtual image B (an image of the partner operator) is generated. The angle of light emitted from the light guide 13 to the hologram screen 14 is set to be the same as the irradiation angle of the reference light in the process of creating the hologram screen 14.

  In addition, the hologram screen 14 according to the present embodiment has light in a specific narrow wavelength region for each wavelength region of R (red), G (green), and B (blue) among images (light) emitted from the light guide 13. The virtual image B is generated by reflecting only the light, and the light LB entering from the back surface is transmitted regardless of the wavelength range. Therefore, the operator A can look into the hologram screen 14 from the area Z, and can visually recognize the partner operator (virtual image B) while viewing the scene existing behind the mobile phone 2 as the background. For example, the user A can talk with the partner operator B while looking at the screen of the television or personal computer behind the mobile phone 2 through the hologram screen 14, so that more information can be obtained. Obtainable.

  As described above, since the hologram screen 14 in the present embodiment is light transmissive, the user A is the mobile phone 2 other than the virtual image B (the partner operator) displayed on the hologram screen 14. Information can also be obtained from the actual scene behind, but by attaching a liquid crystal shutter (not shown) to the back of the hologram screen 14, the hologram screen 14 has a substantially light-transmitting state and a state having no light-transmitting state. Can be freely switched.

  In the above case, for example, the user A distracts from the television screen behind the mobile phone 2 by closing the liquid crystal shutter and making the hologram screen 14 substantially light-opaque. It is possible to enjoy a conversation with the partner operator B without being interrupted.

  Here, an image display imaging operation in the display imaging apparatus 1 of the present embodiment will be described in order. First, when the operator A opens the casing 3 of the mobile phone 2 to the state shown in FIG. 1 and starts communication with the partner, the wireless communication means 5 receives the image information of the partner operator B, The image of the partner operator B is displayed on the small liquid crystal panel 11 via the driver. The image displayed on the small liquid crystal panel 11 is emitted as S-polarized light Ls, the traveling direction is changed by 90 degrees by the reflective layer 8a of the polarizing beam splitter 8, and passes through the projection lens 12 and the light guide 13 to the hologram screen 14. Projected.

  The hologram screen 14 generates a virtual image B of the partner operator, and the operator A looks into the hologram screen 14 from within the area Z to display the partner operator virtual image B at a predetermined depth distance beyond the line of sight S. Can see. At this time, the user A can see through the scene behind the hologram screen 14 at the same time.

  On the other hand, light from the operator A (image of the operator A) is collected by the hologram screen 14 and emitted to the light guide 13, and further passes through the projection lens 12 in the direction opposite to that at the time of projection. The image of the P-polarized light Lp that has been reduced in size and passed without being reflected by the reflecting layer 8 a of the polarizing beam splitter 8 is picked up by the CCD image pickup device 9. The image of the operator A picked up by the CCD image pickup device 9 is transmitted to the other mobile phone by the wireless communication means 5. Accordingly, the operator A can view the partner operator B as a virtual image ahead of the line of sight S, and the hologram screen 14 beyond the line of sight S of the operator A condenses the image of the operator A. Therefore, the operator A can also see the operator A in a state in which the line of sight coincides with the point of the line of sight of the operator B.

  In this embodiment, the CCD image pickup device 9 is arranged at a focal length position with respect to the hologram screen 14, but the small liquid crystal panel 11 is arranged so as to be inside the focal length with respect to the hologram screen 14. ing. The optical arrangement of the CCD image sensor 9 and the small liquid crystal panel 11 with respect to the hologram screen 14, the conditions under which the operator A can see the virtual image B of the partner operator when looking into the hologram screen 14, and the user's operation The conditions for clear imaging of the person A's image by the CCD image sensor 9 will be described with reference to FIGS.

  2A shows an optical path when the operator A views the virtual image B of the partner operator, and FIG. 2B shows a case where the image of the operator A is picked up by the CCD image sensor 9. Indicates the optical path. As shown in FIG. 2A, the small liquid crystal panel 11 is arranged inside the focal length d of the hologram screen 14, and the operator A is more than the focal length d on the other side of the hologram screen 14. The virtual image B can be seen by looking into the hologram screen 14 from the outside.

  Further, as shown in FIG. 2B, the CCD image pickup device 9 is disposed at the position of the focal distance d of the hologram screen 14 and is located outside the focal distance d on the other side of the hologram screen 14. An image of the operator A is generated as a real image at the position of the CCD image sensor 9 and is captured by the CCD image sensor 9.

  As described above, in the present embodiment, the small liquid crystal panel 11 disposed on the inner side with respect to the focal distance d from the hologram screen 14 and the CCD imaging device 9 disposed at the position of the focal distance d from the hologram screen 14. The polarizing beam splitter 8 is formed in a horizontally long rectangular shape, the small liquid crystal panel 11 is fixed to the side surface closest to the reflective layer 8a, and the CCD image pickup device 9 is fixed to the end surface away from the reflective layer 8a. It has been realized.

1 is a schematic side view of a mobile phone in which a display imaging device according to an embodiment of the present invention is incorporated. (A) is a figure which shows the positional relationship of the virtual image of the own operator and other party operator with respect to the hologram screen and liquid crystal panel in the display imaging device, (b) is the own operator with respect to the hologram screen and CCD imaging device in the display imaging device. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display imaging device 2 Mobile phone 3 Case 5 Wireless communication means (communication means)
8 Polarizing beam splitter (image separation means)
9 CCD image sensor (imaging means)
11 Small liquid crystal panel (image display means)
12 Projection lens (projection means)
14 Hologram screen A Self operator B Opponent operator (virtual image)
S line of sight

Claims (4)

A display imaging device capable of displaying an image of the partner operator in a state where the line-of-sight of the own operator and the partner operator match each other,
Image display means for displaying the image of the partner operator on the screen;
Projection means for enlarging and projecting the image displayed by the image display means;
A hologram screen that displays the image of the partner operator projected by the projection means so as to be visible as a virtual image from the operator;
Imaging means for capturing a reduced image of the operator, which is condensed by the hologram screen and formed through the projection means in a direction opposite to that at the time of projection;
An image separation means for separating an image of the other operator emitted from the image display means to the projection means and an image of the own operator incident on the imaging means from the hologram screen through the projection means A display imaging device characterized by the above.   2. The display image pickup apparatus according to claim 1, wherein the image display means, the projection means, the hologram screen, the image pickup means, and the image separation means are stored in a casing of a mobile phone.   The image of the partner operator displayed by the image display means is an image received by the communication means of the mobile phone, and the image of the own operator imaged by the imaging means is transmitted by the communication means of the mobile phone. The display imaging apparatus according to claim 2, wherein   The display imaging apparatus according to claim 2, wherein the hologram screen is a transmissive type capable of seeing through a back surface.

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