JP2014126683A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of effectively displaying a stereographic two-dimensional image corresponding to a tabular information input body placed in the periphery of an image forming optical element in realtime above the device.SOLUTION: A display device causes recognition means (sensor S) to read identification information (IC tag T) of a tabular information input body (card C) placed in the periphery of an imaging optical element (micro-mirror array M) located on an upper surface of a housing; causes the recognition means to send the identification information to control means of a display D to cause the display D, which is mounted such that a display surface Da is tilted by a predetermined angle α with respect to the imaging optical element, to present an image (image I) corresponding to the information input body; and displays a projection of the image through the imaging optical element in the form of a spatial image I' floating in a space above the housing.

Description

  The present invention recognizes a flat information input body placed around an imaging optical element, and projects a stereoscopic two-dimensional image corresponding to the information input body onto a space above the apparatus. It is about.

  Conventionally, on the front side (viewer side) of an image display surface (liquid crystal display panel or the like) that displays an image including a stereoscopic image, an image transmission panel (a connection image) that forms the image in a space apart from the display surface. An image display device in which an image optical element) is arranged is known (for example, see Patent Document 1).

  The image display device includes a pair of microlens arrays (imaging optics) including a plurality of convex lenses (unit optical elements) arranged adjacent to each other in a matrix form on both surfaces at positions spaced parallel to the image display surface. Element) is arranged, and this microlens array forms an image in a space opposite to the display surface (position opposite to the display surface with respect to the element surface of the imaging optical element). Thus, an erecting equal-magnification image of the image can be projected (formed).

JP 2003-98479 A

  However, in the conventional image display device, the image displayed on the display surface of the liquid crystal display panel or the like forms an image on the front surface of the optical element (microlens array) (that is, the front surface of the image display device). The frame of the device enters the viewer's field of view, and there is a problem that it is difficult to obtain a three-dimensional effect or a sense of reality.

  Further, since the conventional image display apparatus has only a function of displaying the same image (information such as video) regardless of who the viewer is, the displayed (projected) image is particularly impressive for the user. It is hard to be. Therefore, there is a need for a display device that effectively and quickly displays “information” (images, videos, etc.) tailored to the user's personal interests, hobbies or preferences.

  The present invention has been made in view of such circumstances, and it is effective to provide a stereoscopic two-dimensional image corresponding to a flat information input body arranged around an imaging optical element in real time above the apparatus. It is an object of the present invention to provide a display device that can display on the screen.

  In order to achieve the above object, a display device according to the present invention includes an imaging optical element disposed on an upper surface of a housing that accommodates a display, and a lower surface of the imaging optical element on the lower side of the imaging optical element. And a display arranged with its display surface inclined at a predetermined angle, a recognition means for recognizing an information input body having identification information, and a control means for controlling an image displayed on the display. The identification information of the flat information input body arranged around the imaging optical element is recognized by the recognition means, and the identification information transmitted from the recognition means to the control means is used for the display. An image corresponding to the information input body is displayed, and a projected image of the image is formed in a state of being raised in a space above the housing via the imaging optical element. Take

  That is, the present inventor has conducted research in order to solve the above problems, and as a result, uses identification information held by a flat information input body such as a card, which is arranged in the vicinity of the imaging optical element by a viewer or the like. By changing (updating) the video displayed on the display to a video corresponding to the information input body, it is possible to quickly and effectively provide “information” (images, video, etc.) suitable for the information input body. I understood that I could do it.

  In addition, as a result of the above research, if a flat object (information input body) such as a card or a plate is present in the vicinity of the imaging optical element, this is a comparative object that produces parallax with the upper surface of the imaging optical element. Therefore, the projected image (aerial image) can be easily seen by the viewer, and from the viewer's viewpoint, this spatial image can be seen more clearly and more realistically. The present inventors have found that it can be felt as an image, and have reached the present invention.

  In the display device of the present invention, a display whose display surface is inclined at a predetermined angle is disposed below the imaging optical element disposed on the upper surface of the housing, and a flat plate is formed around the imaging optical element. Recognizing means for recognizing the identification information held by the information input body is provided, and the control means changes (updates) the display (video) on the display corresponding to the identification information transmitted from the recognition means. The image displayed on the display is transmitted through the imaging optical element disposed on the upper surface of the housing, and a three-dimensional two-dimensional image (aerial image) is displayed above (above the upper surface of the housing). Is imaged. Thereby, the display apparatus of this invention can display the image suitable for the said information input body, an image | video, etc. quickly and effectively.

  In the display device of the present invention, the flat information input body is provided with an opening corresponding to the planar shape of the imaging optical element, around the imaging optical element on the upper surface of the housing. When the image displayed on the display is imaged in the space above the housing through the opening of the information input body placed, the plate-shaped information input body is connected. Since it becomes a comparison object which produces a parallax between the upper surface of the image optical element, the projected image (aerial image) is easily seen by the viewer. Moreover, the aerial image can be felt as a three-dimensional image that is clearer and more realistic from the viewpoint of the viewer. Therefore, the display device of the present invention can make the video displayed on the display more impressive.

  Further, among the display devices of the present invention, in particular, when the imaging optical element is a micromirror array composed of a corner reflector type unit optical element, the displayed stereoscopic two-dimensional image has a higher luminance. It is possible to set an ideal optical path that can be displayed as a high-definition and clear image and that does not include the frame or casing of the apparatus within the viewer's field of view.

  Further, among the display devices of the present invention, those in which the tilt angle of the display surface of the display with respect to the lower surface of the imaging optical element is set to 30 ° or more and less than 90 ° are the three-dimensional images displayed above. A three-dimensional image can be displayed as a three-dimensional image with a stronger floating feeling.

  The “imaging optical element” that can be used in the display device of the present invention includes a refraction type imaging element (a variety of lenses including a Fresnel lens and the like, an afocal optical element) that forms a mirror image of a projection object as a real image. System micromirrors, corner reflectors, etc.). Among these refractive imaging elements, it is preferable that the outer shape is a panel shape or a flat plate shape, and the front and back surfaces (upper and lower surfaces) are relatively flat and flat. The “upper surface” and “lower surface” of the imaging optical element indicate a surface corresponding to the outer side or the inner side of the casing such as a case or a housing, and serves as a reference for imaging (refractive point of the optical path). A surface substantially parallel to the “element surface” of the imaging optical element.

1 is a partial cross-sectional view illustrating a basic configuration of a display device according to an embodiment of the present invention. It is a figure explaining the structure of the micromirror array used for the said display apparatus. It is a partial cross section figure which shows the other structural example of the said display apparatus. 1 is an external perspective view of a display device according to a first embodiment of the present invention. It is sectional drawing which shows the structure of the display apparatus of the said 1st Embodiment. It is an external appearance perspective view of the display apparatus of 2nd Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to this embodiment.

  FIG. 1 is a diagram illustrating a basic configuration of a display device of the present invention, and FIG. 2 is a diagram illustrating a detailed structure of a micromirror array (M) used in the display device. In FIG. 1, in order to briefly explain only the principle of the present invention, members such as a case and a housing, and parts such as wiring and electrical components are not shown. Further, a flat information input body (card C in the figure) holding identification information is drawn with exaggerated thickness.

  As shown in FIG. 1, the display device according to the present embodiment includes a panel-shaped micromirror array imaging optical element (hereinafter referred to as “micromirror array M” or simply “array M”) and a flat panel display (hereinafter referred to as display). D) and a display surface Da with respect to the lower surface Mb on one surface (the lower surface Mb in the figure) side of the array M by reflection of light by a number of micromirrors (corner reflectors) provided in the micromirror array M. Is an aerial image in which an image (image I) displayed on a display D disposed in a state where is tilted at a predetermined angle (α) is obliquely raised in a space on the other surface (upper surface Ma in the figure) side of the array M. As I ′, an image is formed so as to emerge.

  The display device includes a recognition unit (sensor S) for recognizing identification information held by a flat information input body (card C) placed around (upper) the micromirror array M; And a control means for controlling the video (image I) displayed on the display D (display surface Da) (not shown because it is built in the display D). As shown in FIG. In addition, when a flat information input body such as a card C is placed, the identification information held (owned) by the card C or the like is read by the sensor S, and the identification information is transmitted to the control means of the display D. A special video (predetermined image I) corresponding to the identification information is displayed on the display surface Da of the display D. A projected image of the image I displayed on the display D is formed as a spatial image I ′ in the space above the array M via the micromirror array M. This is a feature of the display device of the present invention.

  The display device will be described in detail. As the imaging optical element used in the display device, various lenses including a Fresnel lens and the like, and a refractive imaging element such as an afocal optical micromirror and a corner reflector are used. be able to. In particular, in the present embodiment, as shown in FIG. 2, a micromirror array M (convex corner reflector array) that forms an image at a plane-symmetrical position with respect to the element plane P is preferably used. The micromirror array M is arranged so as to be substantially horizontal with respect to the viewer's viewpoint (sense) by an arbitrary fixing member or the like.

  The micromirror array (corner reflector array) M will be described in more detail. As shown in FIG. 2, the micromirror array M is projected downward on the lower surface (the lower surface Mb side in FIG. 1) of the substrate (substrate) 11. A large number of minute square columnar unit optical elements 12 (corner reflectors) arranged in a diagonal grid pattern [FIG. 2 is a view of the array as viewed from below. ].

  Each of the square columnar unit optical elements 12 of the micromirror array M has a pair of (two) light reflecting surfaces (a first side surface 12a and a second side surface 12b on the side of the square column) that form a corner reflector. Each is formed in a rectangular shape having a “ratio of the vertical length (height h) in the substrate thickness direction to the horizontal width (width w) in the substrate surface direction” [aspect ratio (h / w)] of 1.5 or more. . In each unit optical element 12, the pair of light reflecting surfaces (the first side surface 12a and the second side surface 12b) constituting each corner 12c face the viewer's viewpoint side (E side in FIG. 1). The outer edge (outer side) is rotated by 45 ° with respect to the front of the viewer (see FIGS. 4 and 6).

  Further, as shown in FIG. 1, the flat panel display (display D) for displaying the image I is directed from the viewer's near side (front E side) to the back side with respect to the lower surface Mb of the micromirror array M. The aerial image I ′ projected through the micromirror array M is directed toward the viewer, and is arranged so as to be inclined downward at a predetermined inclination angle α.

  As the display D used for displaying the image I, a liquid crystal display panel (LCD) having a backlight, a plasma display panel, an organic EL display panel, and the like, “white” with no bias as much as possible over the entire visible light wavelength. A display panel that can reproduce “black” when not displayed with good contrast can be used. Further, the display D may be a display unit such as a mobile phone or a portable information terminal. Specifically, as the display D, a smartphone, a tablet PC, a digital photo frame, a portable game machine, a portable type, etc. Among book readers, PDAs, electronic dictionaries, etc., in which the display unit Da is always exposed (not covered), the size of the display surface Da is the size (planar shape) of the micromirror array M. The corresponding size can be used.

  Further, the inclination angle α of the display D is set to 30 ° or more and less than 90 ° (30 ° ≦ α <90 °) in consideration of the posture and distance of the viewer who uses the display device.

  Next, the flat information input body (card C) placed on the upper side of the micromirror array M has a flat plate shape as a whole. As shown in FIGS. An opening Ca corresponding to the planar shape of the array M is provided. The shape of the opening Ca may be, for example, a square shape slightly larger than the upper surface Ma of the array M as shown in FIGS. 4 and 6, or a circular shape, an oval shape, or another polygonal shape such as a hexagonal shape. As an example of the card C, a sheet or thin plate made of paper, plastic or the like can be used, and specific examples include a game entertainment card, a message card, an education card, a shopping card, etc. , Authentication cards, information exchange cards, books such as picture books, albums, and the like.

  Further, the card C has an IC tag (RFID) as unique information (identification information) for identifying the card C at a position corresponding to the sensor S of the display device (a position indicated by a symbol T in FIG. 1). ) T, two-dimensional or one-dimensional barcode (printing), etc. are arranged. Then, as described above, the information held by the IC tag T and the bar code is read by the corresponding sensor S, and the information is transmitted to the control means of the display D by wired or wireless communication. Is done.

  As the sensor S for reading the identification information, when an IC tag T is used for the card C, an IC tag (RFID) reader equipped with an antenna such as an HF or UHF band is used. ) Is used, an optical sensor such as a C-MOS image sensor (camera) or an optical scanner is used.

  As the identification information provided (held) on the card C side, in addition to the non-contact method such as the IC tag T and the barcode, a contact method incorporating a memory (flash memory) having an electrical contact is adopted. May be. Further, as described above, when non-contact identification information such as an IC tag T or a barcode is adopted, if the information can be read, the card C can be viewed as shown in FIG. It may be arranged so as to rise upward (angle θ) from the front (E side) toward the back side (in the direction of the white arrow).

  With the configuration as shown in FIG. 3, a dark part (shadow) is formed between the card C and the micromirror array M (gap), and this dark part becomes the background of the aerial image I ′. Etc. are emphasized. As a result, the depth, floating feeling, and presence of the aerial image I ′ can be more strongly felt. In addition, since the card C rises and tilts, a distance (parallax) is generated between the card C and the micromirror array M, so that the aerial image I is smaller than a display device around the aerial image I ′. This makes it easier to focus on ', and improves the three-dimensional effect, floating feeling and presence.

When the card C is inclined upward (angle θ) from the viewer's front (E side) to the back side (white arrow direction), the inclination angle of the card C with respect to the upper surface Ma of the micromirror array M It is desirable to set θ to be equal to or less than the angle of the inclination angle α with respect to the micromirror array M of the display D, and between these inclination angles α and θ,
0 <θ ≦ α (where 30 ° ≦ α <90 °)
It is preferable to satisfy the above relationship.

  According to the configuration of the display device of the above embodiment, an image I, a video, or the like corresponding to a flat information input body (card C or the like) arranged around the micromirror array M is displayed on the array M. It can be effectively displayed in real time as an impressive three-dimensional image (spatial image I ′) in space.

Next, a more specific embodiment (first embodiment) will be described.
FIG. 4 is an external perspective view of the display device according to the first embodiment of the present invention, and FIG. 5 is a partial cross-sectional view showing the configuration of the display device.

  The display device of the first embodiment also includes a panel-like micromirror array imaging optical element (micromirror array 1) and a flat panel display (display 2), and a number of micromirrors provided on the micromirror array 1 Due to light reflection by the (corner reflector), the image (image I) displayed on the display 2 arranged on the lower surface 1b side of the micromirror array 1 rises diagonally in the space on the upper surface 1a side of the array 1. The aerial image I ′ is formed so as to emerge in space. Also in this display device, the display 2 is mounted on the mounting table 3 in a state where the display surface 2 a is inclined at a predetermined angle α with respect to the lower surface 1 b of the micromirror array 1.

  Further, the display device includes a recognition means (sensor 4) for recognizing identification information held by a flat information input body (card C) placed around (upper side) of the micromirror array 1. And a control means (not shown because it is built in the display 2) for controlling the video (image I) displayed on the display 2 (display surface 2a), and the top plate 5a of the case 5 as shown in FIG. When a flat information input body such as a card C is placed thereon, the identification information held (owned) by the card C or the like is read by the sensor 4, and the identification information is transmitted to the display 2, and the display 2, a predetermined video (image I) corresponding to the identification information is displayed. Then, the projected image of the image I displayed on the display 2 is formed as an aerial image I ′ on the upper side of the array 1 via the micromirror array 1.

  More specifically, the mounting table 3 including the mounting surface 3a for mounting the display 2 includes a plate-like member 3b that also serves as the above-described mounting surface 3a, and bases 3c and 3c. Is disposed inside the case 5. As shown in FIG. 5, the plate-like member 3b is attached to the bases 3c and 3c while being inclined at a predetermined angle α with respect to the bottom surface 5b of the case 5 and the bottom surface 1b (or the element surface P) of the micromirror array 1. The top surface of the display 2 is a mounting surface 3a. Then, by placing a flat panel display such as an LCD on the mounting surface 3 a of the mounting table 3, the display surface 2 a of the display 2 is inclined by α ° with respect to the element surface P of the micromirror array 1. It is supposed to be held in the state. The inclination angle α of the mounting surface 3a in the case 5 with respect to the lower surface 1b (element surface P) of the micromirror array 1 is adjusted so as to optimize the image formation by the array 1, and is usually 30 °. The angle is set to 90 ° or more and preferably 40 ° or more and 80 ° or less.

  A housing (case 5) for housing the display 2 and the mounting table 3 is substantially box-shaped (box-shaped), and a substantially square micromirror array 1 is fitted into an opening provided on the upper surface thereof. (See FIG. 4). Further, on the top plate 5a of the case 5, a card C similar to that of the above embodiment is placed.

  Also with the above configuration, the identification information held by the card C (flat information input body) placed on the top plate 5a of the case 5 is recognized by the sensor 4, and the information is controlled by the control means of the display 2. Is transmitted to. Then, the image I or video corresponding to the card C is effectively displayed as an impressive stereoscopic two-dimensional video (spatial image I ′) in the space above the micromirror array 1.

  Next, as a second embodiment, a case where an open housing is used instead of the substantially box-shaped case 5 will be described. FIG. 6 is an external perspective view of the display device according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the structural member which has the same function as 1st Embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIG. 6, the housing 6 has a shape without a lateral wall surface, and uses one side surface (slope 6 c) as a placement surface of the display 2 (a placement surface inclined at a predetermined angle α). doing. Further, on the top plate 6a of the housing 6, a card C similar to that of the above embodiment is placed.

  Note that a suction (adhesive) tape or the like for fixing the display 2 is attached to the mounting surface (slope 6c) of the display device of the second embodiment, and the display 2 temporarily fixed thereon. Is designed to be removable. Therefore, a display unit such as a mobile phone or a portable information terminal is used for the display 2 of the second embodiment. Specifically, as the display 2, a display unit of a smartphone, a tablet PC, a digital photo frame, a portable game machine, a portable book reader, a PDA, an electronic dictionary, or the like is always exposed (covered). Among them, a size that can be placed on the placement surface (slope 6c) can be used. Moreover, the housing 6 can easily and easily insert, remove, and replace the display 2 (smartphone or the like).

  Further, when using the above-mentioned smartphone, portable information terminal, or the like as the display 2, some of these devices have a device-specific IC tag reader (NFC reader / writer) or an optical sensor (on the back side of the display 2). Some have a CCD camera). In the case of an IC tag reader, the card C (flat information input body) is brought close to the back of a smartphone or a portable information terminal to read (read) the identification information, and then the card C is placed on the top plate. (6a) What is necessary is just to mount. Further, when the optical sensor is arranged on the back of the device, a through hole, a hole or the like for photographing is provided on the mounting surface (slope 6c) at the corresponding position, and a barcode or the like is read through the through hole. Good. Alternatively, when the optical sensor is arranged on the front surface of the device, the card C is inserted under the top plate (6a) to read (read) the identification information, and then the card C is placed on the top plate (6a). ) It may be placed on top.

  Also with the above configuration, the identification information held by the card C (flat information input body) placed on the top plate 6a of the housing 6 is recognized by the sensor 4, and the information is displayed on the display 2 (smart phone or the like). ) Is transmitted to the control means. Then, the image I or video corresponding to the card C is effectively displayed as an impressive stereoscopic two-dimensional video (spatial image I ′) in the space above the micromirror array 1.

  According to the display device of the present invention, a planar information input body placed around the imaging optical element is recognized, and a real stereoscopic two-dimensional image rich in depth corresponding to the information input body. Can be displayed above the apparatus main body.

C card D display Da display surface M micromirror array S sensor T IC tag I image I 'aerial image

Claims (4)

  An imaging optical element disposed on the upper surface of a housing that accommodates the display, and a display surface that is inclined at a predetermined angle with respect to the lower surface of the imaging optical element below the imaging optical element. A display unit, a recognition unit for recognizing an information input body having identification information, and a control unit for controlling an image displayed on the display. The identification information of the information input body is recognized by the recognition means, and the video corresponding to the information input body is displayed on the display by the identification information transmitted from the recognition means to the control means. A display device, wherein a projected image is formed in a state of being raised in a space above the housing via the imaging optical element.   The flat information input body is provided with an opening corresponding to the planar shape of the imaging optical element, and passes through the opening of the information input body placed around the imaging optical element on the upper surface of the housing. The display device according to claim 1, wherein an image displayed on the display is formed in an upper space of the casing.   3. The display device according to claim 1, wherein the imaging optical element is a micromirror array including a corner reflector type unit optical element.   The display device according to claim 1, wherein an inclination angle of a display surface of the display with respect to a lower surface of the imaging optical element is set to be 30 ° or more and less than 90 °.

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