JP6465378B2 - Information display device - Google Patents

Description

  The present invention relates to an information display device capable of projecting video information related to an information display body on a sheet-like information display body such as a menu table placed on a predetermined surface.

  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 due to the imaging action of the microlens array, a position opposite to the display surface with respect to the element surface of the imaging optical element, that is, in a space in front of the microlens array, An erecting equal-magnification image of the image can be projected (formed).

JP 2003-98479 A

  By the way, in restaurants and restaurants that provide food and drink, etc., a “menu table” such as a dish list for dishes, drinks, or set menus (course meals) is usually prepared for customers. These orders are made while looking at them. Therefore, in the above restaurants, etc., there are requests to display model photos and videos related to dishes listed in menus and menus, etc., to connect with impressive food explanations and polite customer service, and to differentiate from other restaurants There are many places that have.

  Therefore, there is an attempt to display a model photo, video, etc. relating to a dish described in a menu or a menu to a customer sitting on a table (table) using the image display device or the like. However, in the conventional method, when a viewer (customer) wants to view a video image (spatial image) projected on the space in front of the microlens array, this spatial image is displayed on the front side of the image display device. Since it looks like it looks from the “front side of the microlens array”, the frame of the device is large in the customer's field of view, making it difficult to obtain a three-dimensional effect, a sense of reality, a high-class feeling, etc. There is a problem. Further, the above apparatus has a drawback that it is a big device for use on a dining table in a store, and lacks compactness and portability.

  The present invention has been made in view of such circumstances, and can two-dimensionally project a two-dimensional image related to the information display body above the sheet-like information display body placed in front of the apparatus. The purpose is to provide a compact information display device.

In order to achieve the above object, the present invention provides a display for displaying an image, a flat micromirror array having a function of transmitting light from one side to the other side and forming an image, and the display and the micromirror. A sheet-like information display body placed on the upper surface of a mounting plate adjacent to the front of the bottom of the housing, and displayed on the display. An information display device for displaying video information to be displayed on the information display body, wherein the micromirror array is placed on the front surface of the housing facing the information display body, and the lower end of the micromirror array is pivoted. The upper part of the information display body is disposed in a forward inclined state inclined at an angle β toward the information display body, and the forward inclination angle β is 30 ° or less with respect to a surface perpendicular to the mounting surface of the information display body. is set, the Isupurei is attached to a predetermined position inside the housing to an angle degree between the display surface and the light transmitting surface of the micro mirror array α is less than 30 ° or 90 °, which is displayed on the display surface of the display the An information display device in which video information is projected in a state of floating in a space above the information display body through a micromirror array disposed on the front surface, and a first gist To do .

The present invention, among the above information display device, in particular, the sheet-shaped information display is a carte described cooking menu, image information to be projected onto the menu table, upper Symbol a cooking video related fee management menu information display device, the second aspect.

  In other words, the present inventor has conducted research to solve the above-described problems, and as a result, a “micromirror array” (a two-sided corner reflector array) is used as an optical element for forming an image, and a spatial image is obtained from the display. By constructing the path (optical path) by bending it, we succeeded in developing a display device with a compact configuration, which was difficult with the conventional microlens array (linear optical path). Then, by making the arrangement so that the customer is not conscious of the micromirror array itself (the array itself is hard to enter the field of view) as much as possible, it is easy to see the image from the customer side, and the stereoscopic effect and realism of this image, etc. It has been found that it is possible to greatly improve.

  In the present invention, the customer side who appreciates the information display device and the side on which video information (aerial image) related to the information display body is projected is referred to as “front” or “front side” of the device. (This is the front side as viewed from the customer or viewer). Further, the entire micromirror array has a vertical (vertical) state along a surface (indicated by a vertical line V in the drawing) perpendicular to the mounting surface of the information display body (the upper surface on the table). The state in which the entire micromirror array is inclined from the surface perpendicular to the mounting surface of the information display body (perpendicular line V in the figure) to the “front” which is the information display body side (customer side) "Inclined state" (forward tilted posture tilted at a forward tilt angle β), and conversely, the state in which the upper end of the micromirror array is tilted to the "rear" (back side) that is the side away from the information display body (customer) , “Back tilt state” (back tilt posture tilted at a back tilt angle γ). The standing state includes a case where the forward tilt angle β is 0 ° (zero degree) and a case where the rearward tilt angle γ is 0 ° (zero degree).

In the information display device of the present invention, a flat micromirror array having an imaging function is placed on the front surface (front side surface) of the housing facing the sheet-shaped information display body placed in front of the housing. are arranged in an inclined forward tilt state against the mounting surface of Jo information display at a predetermined inclination angle of beta (30 ° or less), the display, the display surface of the micro mirror array corresponding thereto The angle formed with the light transmission surface (surface or element surface) is a predetermined angle α (30 ° or more and less than 90 °) . As a result, the information display device projects the image displayed on the display surface of the display in a state of passing through the micromirror array and floating in the space above the information display body. Therefore, the information display device according to the present invention provides a three-dimensional video information related to the information display body so as to cover the information (description information) such as characters and images described in the information display body. Can be displayed automatically.

  Moreover, the stereoscopic image information (aerial image) displayed in a state of floating in the space above the information display body can be viewed simultaneously with the description information on the surface of the lower information display body through the aerial image. it can. Therefore, the information display device of the present invention not only increases the amount of information related to the information display body, but also makes the display information memorable and interesting.

The upper SL micromirror array, the front surface of the housing facing the said information display, are arranged in a vertical upright position relative to the mounting surface of the information display, the standing state of the micromirror array angle of the light transmitting surface and the display surface of the display α is, the information display apparatus is set to less than 30 ° or 90 °, stereoscopic image information related to the information display (spatial image), It is possible to display clearly so as to overlap with the description information of the information display body.

Furthermore, the information display device according to the present invention particularly has the micromirror array on the front surface of the housing facing the information display body, with the lower end of the micromirror array serving as a swing base point, and the upper part on the information display body side. The forward-tilt angle β is 30 ° or less with respect to a surface perpendicular to the mounting surface of the information display body (excluding an upright state where β is 0 °). ) is set to, the angle of the light transmitting surface and the display surface of the display of the micromirror array of anteversion condition α is set to less than 30 ° or 90 °. Therefore , stereoscopic video information (spatial image) related to the information display body can be displayed at a position closer to the surface of the information display body so as to overlap the description information of the information display body. In addition, since the micromirror array is arranged so that the upper end of the micromirror array is inclined forward toward the information display body (that is, the upper end is closer to the customer or the viewer), the micromirror array is arranged. Are not easily disturbed by customers and are not easily perceived. Therefore, the customer who looks at the aerial image improves the stereoscopic effect and the realistic sensation of the aerial image without being conscious of the device.

The upper SL micromirror array, the front surface of the housing facing the said information display, as the base point of the swing the bottom edge of the micromirror array, towards the rear side opposite to its upper and the information display side The rearward tilt angle γ is 60 ° or less (except for the standing state where γ is 0 °) with respect to the surface perpendicular to the mounting surface of the information display body. is set, the angle of the light transmitting surface and the display surface of the display of the micromirror array of the rear inclined state α is, the information display device is set to less than 30 ° or 90 °, as in the above, the information The stereoscopic image information (spatial image) related to the display body can be clearly displayed so as to overlap the description information of the information display body.

Then, among the information display device of the present invention, in particular, the sheet-shaped information display is a carte described cooking menu, image information to be projected onto the menu table, upper Kiryo management The food video related to the menu is optimized for restaurants and restaurants that offer food and drinks, and on the menu table placed on the table (table) By displaying model photos and videos related to the described dishes, it is possible to connect to impressive cooking explanations and polite customer service, and to differentiate from other stores.

It is sectional drawing which shows the structure of the information display apparatus of 1st Embodiment of this invention. It is a perspective view explaining the use condition of the information display apparatus of the said 1st Embodiment. It is a perspective view explaining the use condition of the information display apparatus of 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the information display apparatus of 3rd Embodiment of this invention. It is a perspective view explaining the use condition of the information display apparatus of the said 3rd Embodiment. It is sectional drawing which shows the structure of the information display apparatus of 4th Embodiment of this invention. It is a perspective view explaining the use condition of the information display apparatus of the said 4th Embodiment. It is a figure explaining one structural example of the micromirror array used with the information display apparatus of embodiment of this invention, (a) is two optical element substrates (single unit) before superimposing, (b) is It is a figure which shows the array after overlapping. (A), (b), (c) is a figure explaining the other structural example of the micromirror array used with the information display apparatus of embodiment of this invention, respectively.

  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. Further, the image I and the aerial image I ′ in each figure are drawn with exaggerated thickness, and the state of transmission of light emitted from the display (light path or light beam) is indicated by a two-dot chain line with an arrow. Show.

  The information display device of the first embodiment shown in FIG. 1 and FIG. 2 is a menu table S (two points) such as a dish list and a menu list arranged on a table such as a restaurant or a restaurant. It is a “menu information display device” for three-dimensionally projecting an image of the cooking model (spatial image I ′) related to the menu table S above (displayed with a chain line). In the information display apparatus, the side on which the menu table S is placed (that is, the side on which the aerial image I ′ is projected, which is the right side in FIG. 1 and the left side in FIG. 2). Is called “front” (front side or front side) of the device.

  This information display device includes a flat panel display (display D) for displaying an image (image I), and a flat plate-like micromirror array M (hereinafter referred to as an image by transmitting light from one surface side to the other surface side). , Which may be simply abbreviated as “array”), and a housing 10 that accommodates the display D and the array M. On the guide plate 11 disposed in front of the apparatus at the bottom 10b of the housing 10, The menu table S such as the menu list is placed.

  In the information display device, the micromirror array M attached to the front side surface 10c of the housing 10 on the side facing the menu table S so as to transmit light is perpendicular to the menu table S (perpendicular line V: The display D, which is arranged in a state tilted forward by a predetermined angle β (forward tilt state) with respect to the dotted line) and is linked thereto, is attached to the inner surface side of the top surface (upper surface 10a) of the housing 10, With respect to the light transmission surface (element surface P: alternate long and short dash line) of the inclined array M, the array M is disposed so as to be diagonally opposed at a predetermined angle α.

  With this configuration, as shown in FIG. 1, the information display device allows the video (image I) displayed on the display surface Da of the display D to pass through the micromirror array M and above the menu table S. It is displayed as a three-dimensional space image I ′ floating in the space. That is, as shown in FIG. 2, the information display device of the present embodiment displays a cooking video (image I) relating to the menu table S on information (description information) such as characters described in the menu table S. It can project in a semi-transparent (semi-transparent) form so as to overlap. This is a feature of the information display device of the present invention.

  The members constituting the information display device will be described in detail. As shown in FIG. 8A, the micromirror array M having an imaging function has a plurality of linear grooves parallel to each other on the surface. The two optical elements (substrates 1 and 1 ') formed at intervals of 1 are overlapped with each other rotated horizontally by 90 ° with respect to the other (see FIG. 8B). The detailed structure of the array will be described later.]

  Then, as shown in FIG. 2, the micromirror array M can transmit an image through the opening 10d to the window-like opening 10d provided on the front side surface 10c of the front surface of the housing 10 facing the menu table S. It is attached as follows. The front side surface 10c of the housing 10 and the micromirror array M attached to the front side surface 10c are perpendicular to the guide plate 11 and the table S placed thereon (perpendicular line V: dotted line). A predetermined angle β (20 ° in the case of FIG. 1) is inclined and arranged so that the aerial image I ′ is displayed directly above the menu table S as shown in FIG. . In addition, the forward tilt angle β is usually set on the menu table S side (customer table side) in consideration of the overlap of the aerial image I ′ with respect to the menu table S and the effect of making the micromirror array M itself difficult to see (hide) from the customer. The inclination angle is set to be more than 0 ° and 30 ° or less, preferably 10 ° or more and 25 ° or less. (The “standing state” in which the forward tilt angle β is 0 ° will be described in an embodiment described later.)

  On the other hand, the display D is attached to the inner surface side of the top surface (upper surface 10a) of the housing 10, and an angle formed by the display surface Da of the display D and the light transmission surface (element surface P) of the micromirror array M. It arrange | positions so that (alpha) may be 30 degrees or more and less than 90 degrees (70 degrees in the case of FIG. 1). When the angle α is 0 to 30 °, the light of the display D does not sufficiently reach the micromirror array M, and the brightness and sharpness of the aerial image I ′ are reduced (0 ° or less or 90 ° or more The light does not reach the array and cannot be projected).

  As a flat panel display (display D) used for displaying the video (image I), a liquid crystal display panel (LCD) having a backlight, a plasma display panel, an organic EL display panel, etc. are biased as much as possible over all visible light wavelengths. It is desirable to use a display panel that can reproduce “white” with no contrast and “black” when not displayed with good contrast. 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., the display unit (display surface Da) is always exposed (not covered), and the size of the display surface Da is the size of the micromirror array M ( A plane having a size corresponding to (planar shape) can be used.

  The casing 10 for housing the micromirror array M and the display D is not particularly limited in material such as paper, plastic, metal, etc., but is preferably resin molded in consideration of portability, heat resistance, durability, and the like. Goods are used. As its shape, for example, in the first embodiment of FIG. 1, the front side surface 10c on which the micromirror array M is disposed and the top surface (upper surface 10a) on which the display D is disposed are the position, shape, Although the arrangement of the angle and the like is defined from the design stage, the other side surface and the apparatus bottom surface 10b may have an appropriate shape, and may have a structure having no other side portion or bottom portion. Further, the bottom plate 10b may be extended to the front of the apparatus so that the guide plate 11 is also used (integrated). However, due to the characteristics of the information display device, it is desirable that the shape and color (appearance) of the housing 10 be less conspicuous than the aerial image I ′ or the menu table S.

  Furthermore, the guide plate 11 for guiding the placement place (area) of the menu table S is not shown in FIG. 5 (third embodiment) described later, in addition to the plate-like body (11) in the present embodiment. It may be a frame-like body (guide frame 21) or the like into which a document or paper can be inserted, and as shown in FIG. 3 (second embodiment), an area (two points) on the table board is not particularly installed. You can just set the chain line. In that case, a mark, a sign, a pattern, or the like on the table may be used as a guide for the placement area.

  In the first embodiment (FIG. 2), the large menu table S (see the two-dot chain line) is folded and placed on the guide plate 11, so that the opening 10d (array M) on the front surface of the housing 10 is blocked. In order to prevent this, an opening (substantially hexagonal in FIG. 2) for transmitting an image is provided at a position corresponding to the opening 10d (array M). When the menu table S does not cover the opening 10d of the casing 10, it is not necessary to provide it. Further, instead of the menu table S, a sheet-like information display body on which various types of information are written, a document, paper, or the like may be placed.

  According to the information display device described above, it is possible to view the description information on the menu table S below the watermark image I ′ displayed in a floating state in the space above the menu table S. Therefore, the information display device (menu information display device) of the present embodiment not only presents the cooking video related to the menu as a spatial image I ′ to the customer, but also by the stimulus received from the spatial image I ′. The synergistic effect makes it possible for the food to be provided to be interesting and remain in the customer's impression.

  Next, FIG. 3 is a figure which shows the structure of the information display apparatus of 2nd Embodiment of this invention. The information display device main body has the same configuration as that of the first embodiment, and thus detailed description thereof is omitted.

  As described above, the information display device according to the second embodiment does not have the guide plate 11 or the guide frame 21 that guides the planned placement place (area) of the menu table S, and the table top. Only a virtual region (two-dot chain line) indicating the region is set on the upper surface of the plate. For this reason, this device is highly portable. For example, when this device is carried or moved, image information related to it is written on documents or papers of various sizes and shapes in which various information is described.・ It can be used as “digital signage” to display. Further, in restaurants, restaurants, etc., in addition to the use on the dining table, it can also be used by being installed in the storefront, in the vicinity of the entrance of the store, in an empty seat waiting area, or the like.

Next, FIGS. 4 and 5 show the configuration of the information display apparatus according to the third embodiment of the present invention.
Similar to the first embodiment, this information display device is also a display device that projects an image (aerial image I ′) of the cooking model relating to the menu table S above the menu table S (displayed by a two-dot chain line). . 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. Further, as described above, the reference numeral 21 in the figure is a guide frame that guides the placement place (area) of the menu table S.

  The most different point of the third embodiment from the information display device of the first embodiment is that the micromirror array M disposed on the front side surface 20c of the housing 20 is located inside the guide frame 21 as shown in FIG. It is a point set to “standing state” (both forward tilt angle β and rearward tilt angle γ are both 0 °) along a surface (perpendicular) perpendicular to the menu table S placed on the table surface. .

  The angle α formed between the display surface Da of the display D attached to the inner surface side of the top surface (upper surface 20a) of the housing 20 and the light transmission surface (element surface P) of the micromirror array M is the first embodiment. Like the form, it is designed to be 30 ° or more and less than 90 ° (60 ° in the case of FIG. 4). In addition, the other side surface and the apparatus bottom surface 20b excluding the front side surface 20c and the upper surface 20a of the housing 20 may have an appropriate shape, and may have a structure without these other side portions and bottom portion. The form is the same.

  According to the information display device of the third embodiment having the above-described configuration, the image (image I) relating to the menu table S is projected three-dimensionally so as to overlap the description information described on the menu table S. Can do. In addition, in the information display device, since the micromirror array M is erected vertically with respect to the menu table S, the micromirror array M is hardly visible to the customer sitting on the table and hardly noticed. . Therefore, in the information display apparatus according to the present embodiment, the presence of the array M is not obstructed by the customer, and the stereoscopic effect and the realistic sensation of the aerial image I ′ are further emphasized, and the cooking image becomes more impressive.

Next, the configuration of the information display apparatus according to the fourth embodiment of the present invention is shown in FIGS.
This information display device is different from the information display devices of the first to third embodiments in that the micromirror array M attached to the front side surface 30c of the housing 30 is placed on the guide plate 31. This is a point arranged in a rearward tilted state (angle γ) that falls backward (back side) on the opposite side to the customer (viewer) with respect to a surface (perpendicular line: dotted line) perpendicular to Table S. In the above case, the angle γ at which the micromirror array M is inclined with respect to the plane (perpendicular line V: dotted line) perpendicular to the mounting surface of the menu table S is usually considered in consideration of the visibility to the customer. It is set to 0 ° to 60 ° or less, preferably 10 ° to 50 ° (30 ° in the case of FIG. 6), on the far side opposite to the table S side (customer side).

  In addition, an angle α formed by the display surface Da of the display D attached to the back side surface 30a of the housing 30 and the light transmission surface (element surface P) of the micromirror array M is 30 ° or more and less than 90 ° (see FIG. In the case of 6, it is designed to be 60 °). In addition, except for the front side surface 30c and the back side surface 30a of the housing 30, the other side surface, the device top surface, and the device bottom surface 30b may have an appropriate shape, and there is no other side portion, top portion, or bottom portion. It is good also as a structure.

  Even with the above configuration, although the distance from the menu table S is slightly separated, the cooking image (spatial image I ′) relating to the information described in the menu table S is displayed and projected in a state floating in the space above the menu table S can do.

  In the above-described series of embodiments, the “menu table” is used as the sheet-like information display body for displaying information, and the “cooking video relating to the cooking menu” is used as the video information to be projected. It is not limited to this, and information such as sheet, film, paper, etc. on which various information is written, document, paper, etc. are placed, and related video information is projected. Also good.

  Next, the micromirror array used in the information display device of each of the above embodiments will be described.

As shown in FIG. 8 (a), the micromirror arrays M1 to M3 having an imaging function include a plurality of parallel micromirror arrays M1 to M3 which are parallel to each other by dicing using a rotary blade on the surface of a transparent substrate made of acrylic or glass. linear grooves two optical elements which are formed at predetermined intervals in the [alone, respectively upper and lower in FIG. 8 (a)], so that the direction of extension of the straight grooves of the optical element are orthogonal to each other in plan view, It is comprised as a set in the state piled up in either aspect of following (X)-(Z).
(X) A mode in which the front surfaces formed with linear grooves in each optical element are in contact with each other. [See Fig. 8]
(Y) A mode in which the front surface on which the linear groove of one optical element is formed contacts the back surface on which the groove of the other optical element is not formed. [See Fig. 9 (a)]
(Z) A mode in which the back surfaces where grooves are not formed in each optical element are in contact with each other. [See FIG. 9 (b)]

  Further, the micromirror array M4 shown in FIG. 9C has a dicing process using a rotary blade on each of the other surface opposite to the one surface of one transparent flat substrate constituting the optical element. Accordingly, a plurality of linear grooves parallel to each other are formed at predetermined intervals so that the linear grooves on the front surface side and the linear grooves on the back surface side are orthogonal to each other in plan view.

  The structure of each micromirror array will be described by taking the micromirror array M1 of FIG. 8 as an example. The micromirror array M1 shown in FIG. 8B is an optical element (1, 1 ′) shown in FIG. It is configured by overlapping. Substrates 1 and 1 ′ (substrates before forming grooves 1g and 1′g) constituting each optical element are bases for engraving and processing linear grooves 1g and 1′g, such as glass and acrylic resin. Further, it is made of a material having a visible light transmittance of 80% or more.

The substrates 1 and 1 'are usually hard plates having a certain thickness (thickness of about 0.5 to 10.0 mm), and the upper surfaces (front surfaces 1a and 1'a) are diced. Thus, the linear grooves 1g and 1'g are carved and formed. The substrate surface portion between which the groove 1g between the linear groove 1g and the adjacent groove 1g is not engraved is a convex portion that protrudes toward one surface of the substrate 1, 1 ′ due to the formation of the adjacent groove. It is (a ridge part or a ridge part). Further, the plate-like portion ( the plate-like portion on the back surface 1b, 1'b side ) where the engraving of each of the grooves 1g, 1'g has not reached is formed by leaving the engraving between the grooves 1g, 1'g. It becomes a support base of the above-mentioned convex line part.

  The grooves 1g and 1'g on the substrates 1 and 1 'are formed by a rotary blade (cutting) such as a dicing machine or the like, and are processed surfaces (front surfaces) of the substrates 1 and 1'. ) At a predetermined interval (pitch) in one direction and parallel to each other. Since the side surfaces (wall surfaces) constituting these grooves 1g and 1'g are formed by dicing using the rotary blade, they are formed on a light reflective vertical surface (mirror surface).

  In addition, the grooves 1g and 1'g obtained by engraving using a dicing blade or the like are usually 0.015 mm (15 μm) to 0, although depending on the thickness of the blade (total thickness between rotating blade end faces). When a blade having a thickness of about 3 mm (300 μm) is used, grooves 1 g and 1′g having a groove width of about 20 to 350 μm and a groove depth of about 50 to 500 μm are formed. The remaining region (projection strip) where 1′g is not formed has a parallel rib shape having a width (W) of about 50 to 300 μm and a height of about 50 to 500 μm (same as the depth of the groove). ing.

  And two board | substrates 1 and 1 'in which each said linear groove | channel 1g and 1'g were formed rotated one board | substrate 1' horizontally 90 degrees with respect to the other board | substrate 1 of the lower side. In a state (that is, a state in which the phase of the extension direction of the “groove” in the lower substrate 1 and the upper substrate 1 ′ is different by 90 °), these substrates 1 and 1 ′ are overlapped to obtain FIG. And three modes of micromirror arrays M1, M2, and M3 shown in FIGS. 9A and 9B are formed.

  In addition, since the phase in the groove direction between the lower substrate 1 and the upper substrate 1 ′ is 90 ° different from each other as described above, the grooves 1g of the substrate 1 and the substrate 1 ′ formed in the same shape are used. , 1′g are arranged in such a way that their continuous directions are orthogonal to each other in plan view (three-dimensionally “twisted position”). In this state, when each of the micromirror arrays M1, M2, M3 is viewed from the front and back direction (vertical direction) of the substrate, the grooves 1′g of the upper substrate 1 ′ and the grooves 1g of the lower substrate 1 are , In a lattice shape orthogonal to each other in plan view, and at each of these intersections, a light-reflective vertical surface (second mirror surface) of each groove 1′g of the upper substrate 1 ′ and a lower substrate A corner reflector [a two-surface corner reflector spaced apart in the vertical direction] formed of a light-reflective vertical surface (first mirror surface) of each groove 1g is formed.

  The micromirror array M1 shown in FIG. 8B is configured as described above, and uses two optical elements (substrates 1 and 1 ′) having the same shape, and the upper substrate 1 ′. The front surface 1′a in which the groove 1′g is formed in the upper substrate 1 ′ is rotated in a state where the substrate 1 ′ is rotated by 90 ° with respect to the other substrate 1 on the lower side. The lower substrate 1 is brought into contact with the front surface 1a where the grooves 1g are formed, and the extending directions of the grooves 1g and the grooves 1'g provided on the substrates 1 and 1 'are orthogonal to each other in plan view. As described above, these substrates 1 and 1 ′ are stacked one above the other (aspect (X)).

Further, the micromirror array M2 shown in FIG. 9A uses the two optical elements (substrates 1 and 1 ′), and each groove 1g and groove 1 ′ provided on the substrates 1 and 1 ′. Grooves 1g in the lower substrate 1 are formed in a state where the upper substrate 1 ′ is rotated by 90 ° with respect to the lower substrate 1 so that the continuous directions of g are orthogonal to each other in plan view. By making the back surface 1'b where the groove 1'g of the upper substrate 1 'is not formed abut on the front surface 1a, and superimposing these substrates 1 and 1' vertically, one set [Membrane (Y)]. Even if the grooves 1g and 1'g of the substrates 1 and 1 'are overlapped so as to face downward in the figure, a micromirror array having the same configuration can be obtained.

Further, the micromirror array M3 shown in FIG. 9B uses the two optical elements (substrates 1 and 1 ′) to invert the lower one substrate 1 ′ so that the substrate 1 ′ is reversed. In a state of being rotated by 90 ° with respect to the other substrate 1 on the upper side, the back surface 1b of the upper substrate 1 and the back surface 1′b of the lower substrate 1 ′ are brought into contact with each other and provided on the respective substrates 1 and 1 ′. The substrates 1 and 1 'are stacked one above the other so that the extending directions of the respective grooves 1g and 1'g are orthogonal to each other in plan view, thereby forming a set of arrays M3 [(Z) Embodiment].

  Further, in the micromirror array M4 shown in FIG. 9C, each of the micromirror arrays M1, M2, and M3 uses two substrates 1, 1 ′ each having a straight groove (g) formed on one surface. In contrast, the micromirror array M4 is composed of a single substrate 2 (optical element). That is, the micromirror array M4 is linearly parallel to each other by dicing using the rotary blade or the like on the upper front surface 2a and lower lower surface 2b of the transparent flat substrate. A plurality of grooves 2g and 2g ′ are formed at a predetermined interval, and each groove 2g on the front surface 2a side and each groove 2g ′ on the back surface 2b side are formed in a direction (continuous direction). Are arranged so as to be orthogonal to each other in plan view.

  As the micromirror array (M) used in the display device of each of the above embodiments, any of the micromirror arrays M1 to M4 can be used, but in particular, the micromirror array M1 shown in FIG. From the viewpoint of preventing dust and the like from adhering to the array, it is most preferably used.

  In any of the micromirror arrays M1 to M4, the path (optical path) from the display D to the aerial image I ′ can be bent and shortened as compared with an image display device using a conventional microlens array. Is possible. Accordingly, each of the micromirror arrays M1 to M4 contributes to a compact information display device.

  The information display device of the present invention is a digital display that projects and displays three-dimensionally video information related to an information display body such as a menu table placed on a desk, table or table. It can be used easily and easily as a signage. In addition, the information display device of the present invention is compact and lightweight, excellent in portability and portability, and can be used for various applications.

M Micromirror array D Display Da Display surface S Menu table I Image I 'Space image V Perpendicular 10, 20, 30 Case 10c Front side

Claims (2)

A display for displaying an image; a flat micromirror array having a function of forming an image by transmitting light from one side to the other side; and a housing for housing the display and the micromirror array. A sheet-like information display body is mounted on the upper surface of the mounting plate adjacent to the front of the bottom of the body, and video information related to the information display body displayed on the display is displayed on the information display body. An information display device for display, wherein the micromirror array is placed on the front surface of the housing facing the information display body, the lower end of the micromirror array is set as a swing base point, and the upper part thereof faces the information display body side. It is arranged in a forward tilt state inclined at an angle β, and the forward tilt angle β is set to 30 ° or less with respect to a plane perpendicular to the mounting surface of the information display body. My Angle of the light transmitting surface of Romiraarei α is attached to a predetermined position inside the casing which is less than 30 ° or 90 °, the video information displayed on the display surface of the display, disposed on the front An information display device characterized by being projected through the micromirror array in a state of floating in the space above the information display body . The sheet-shaped information display is a carte described cooking menu, image information to be projected onto the menu table, according to claim 1 Symbol placement information display is cooking video about the upper Kiryo management menu apparatus.

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