JP4759412B2 - Table type information display terminal - Google Patents

Description

  The present invention relates to a table type information display terminal in which a screen is provided on a top plate of a table and an image can be projected and displayed on the screen.

  As a method for providing a desired content to a user, conventionally, a list of menus (content list) is first displayed on a display surface, and this content list is selected by selecting a menu of the desired content from the content list. There is known a method in which a server selects and displays selected content on the same display surface.

  As a conventional example of such a method, a method has been proposed in which the content list is scroll-displayed on the display surface so as to flow from right to left, for example (see, for example, Patent Document 1).

In a waiting room in a public place, a coffee shop, a cafe, a bar, etc., for example, a game machine or the like is provided with a video display surface on the table surface, and a desired video is displayed on the table surface for the user to play games. There are also things such as providing videos. By applying the content providing method described in Patent Document 1 on such a table-type information display terminal, it may be possible to selectively receive provision of video desired by the user.
JP 2001-273298 A

  By the way, when the method described in Patent Document 1 is applied to video display on the table surface of a table, conventionally, as shown in FIG. 13A, a projector (not shown) is provided in the housing of the table, Further, a screen 101 is provided on the back surface (lower surface) of the flat top plate 100 made of a transparent material such as glass or acrylic on the table so as to face the projector, and an image is projected and displayed on the screen 101 from the projector. A configuration in which the user who uses this table views the projected image on the screen 101 from the upper surface of the top plate 100, that is, the table surface 100a side, or as shown in FIG. In addition, a display screen 102 is provided opposite to and close to the back surface of the top plate 100 so that the user can perform the operation from the table surface 100a side of the top plate 100. Configuration so as to view the displayed image on the display screen 102 is taken.

  However, in the table type information display terminal having such a configuration, it is possible to view an image displayed not only from directly above the table surface 100a but also from diagonally above, such as when the user is sitting on a chair. In order to do this, light is diffused on the screen 101 or the display screen 102, but the displayed image is a touched image such as a game, and the displayed image is touched while viewed from diagonally above. In such a case, since the top plate 100 has a thickness of, for example, 20 mm, the touch position of the fingertip of the hand H on the table surface 100a and the display position of the part to be touched by the user on the display image (touch) A distance corresponding to the thickness of the top plate 100 is generated between the touch position and the touch target position. Chi, so that parallax occurs. As a result, it is difficult for the user to determine whether or not the touch target position is correctly touched, and in order to be sure that the user has touched correctly, it takes time and effort to stand up and watch the display video from right above. Is required.

Further, since the table surface 100a forms the surface of the top plate 100 made of a material such as transparent glass or acrylic, external light Lo such as illumination light from the ceiling lamp or other ambient light is applied to the table surface 100a. The image such as the light source of the external light is reflected on the display image, and the display image becomes difficult to see. In order to solve this problem, it is conceivable to apply a non-glare process to the surface of the top plate 100, but this causes the display image to be blurred. In order to eliminate this blur, it is conceivable that the top plate 100 is further thinned. However, an unexpected load may be applied to the top plate 100 by a customer wearing an elbow, etc. There is a limit to thinning terms of mechanical strength can not be excluded blurring of the image due to non-glare treatment.

  Furthermore, since the table surface 100a is a plain surface such as a glass surface or an acrylic surface, it is an inorganic image surface and may not be suitable for public waiting rooms, bars, cafes, coffee shops, etc. When touching the displayed image, the tactile sensation is inferior to a table surface having a pattern such as a wood grain such as a wooden table. In addition, when touched, the fingerprints are easy to get on and become conspicuous, and the cleanliness is lost. This fingerprint overlaps with the image on which the fingerprint is displayed, making it difficult to see the image or degrading the image quality.

  An object of the present invention is to solve such problems, give a feeling of directly touching the displayed image, and display a clear and high-quality image while matching the table surface with the image of the place (atmosphere of the installation location). It is to provide a table type information display terminal that can perform the above.

In order to achieve the above object, according to the present invention, the top plate of the table is made of a transparent material having a thickness , and the upper surface of the top plate has a light diffusivity larger than that of the top plate and reflects light on the upper surface. A light-transmitting sheet-like screen made of a material with a low rate is arranged , a projector is provided in the table, and the image is projected from the projector so as to be focused on the screen, and the projected image is displayed on the top surface of the top plate It is characterized by being configured .

  The present invention also provides a light source that irradiates the screen with light of a specific wavelength region from above the screen, a video camera unit that is provided in a table and photographs the light of the specific wavelength region that passes through the screen, and a video And a means for detecting information on an object that blocks light in a specific wavelength region on the screen from an image signal obtained by photographing by the camera unit, and recognizing the position of the object and the object relative to the screen.

In addition, the present invention is characterized in that a pattern is provided on the upper surface of the screen , and this pattern can be seen when no image is projected .

Further, the present invention is characterized in that the screen is a sheet-like natural wood, or a cloth-like or paper-like material on which a pattern is printed.

Further, the present invention is the lower surface of the screen, a same pattern as the above pattern, wherein the pattern to compensate for variations in the light transmittance of the screen by the pattern is provided.

  According to the present invention, it is possible to eliminate the parallax between the touch position by the pointing means such as the fingertip and the touch target position in the projected image, and to give the customer a feeling that the projected image is directly touched, and to place on the table surface. A projected image can be displayed clearly and with high image quality while having a combined pattern.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing a first embodiment of a table type information display terminal according to the present invention, where FIG. 1 (a) is an external perspective view, and FIG. 1 (b) is a longitudinal section in the depth direction (Y direction). 1 is a table, 2 is a top plate, 3 is a table surface, 4 is a screen, 5, 5a and 5b are display areas, 6 is a projector (video projection device), and 7 is an illumination lamp.

  In FIG. 1A, a table 1 is formed from a table housing 1 a and a top plate 2 attached to the top of the table housing 1 a, and the top surface of the top plate 2 forms a table surface 3. The table 1 is horizontally long in the X direction, and a screen 4 is provided on the horizontally long table surface 3 over the entire surface or almost the entire surface. The screen 4 may be fixed to the table surface 3 or may be placed so as to be in contact with the table surface 3. Further, the screen 4 may be provided on the entire surface of the table surface 3, or covers the entire surface of the table surface 3 as long as it covers the entire display area 5 of the projector provided inside the table 1. It doesn't have to be a thing.

  Inside the table 1, as shown in FIG. 1B, a projector 6 that projects an image on a screen 4 is provided. Here, it is assumed that the table 1 is horizontally long and two such projectors 6 are provided in the longitudinal direction of the table 1, and the projection light of these projectors 6 is condensed on the screen 4, so that these projectors 6 Are projected and displayed on the display areas 5a and 5b of the display area 5 of the screen 4 (FIG. 1A). In these display areas 5a and 5b, it is also possible to display separate videos in which the contents of each projector 6 are not related to each other. However, the images displayed in the display areas 5a and 5b by these projectors 6 are continuous. One video can be displayed on the entire display area 5.

  In this way, the table 1 constitutes a table type information display terminal.

  FIG. 2 is a system configuration diagram provided in the case 1a of the table 1 in FIG. 1, wherein 6a and 6b are projectors, 8 is a control unit, 9 is a storage unit, and a portion corresponding to FIG. The same reference numerals are given.

  In the figure, two projectors 6a and 6b are arranged along the screen 4 in the longitudinal direction (X direction) of the screen 4 in the housing 1a of the table 1 (FIG. 1). In addition, a control unit 8 is provided, and the control unit 8 reads out the video signal stored in the storage unit 9 and supplies it to the projectors 6a and 6b for driving, whereby the projectors 6a and 6b supply the signals. Images corresponding to the image signals to be displayed are projected, and these images are condensed on the screen 4 and projected and displayed by optical systems (not shown) provided respectively. Here, the image from the projector 6a is projected and displayed on the display area 5a (FIG. 1) on the screen 4, and the image from the projector 6b is also projected and displayed on the display area 5b (FIG. 1).

In this system, although not shown, it is possible to receive desired content (video information) such as game information from the outside such as a server via the Internet, etc., and the control unit 8 can download the downloaded content. The video signal is stored in the storage unit 9. Further, by operating an operation unit (not shown), a list of contents stored in the storage unit 9 can be displayed on the screen 4. When the user touches and selects a desired content in the list, the control unit 8 reads out the video signal of the selected content and supplies it to the projectors 6a and 6b. Thereby, the video of the content selected by the user is displayed on the screen 4.

3A to 3C are cross-sectional views showing a specific example of the screen 4 provided on the top plate 2 in FIG. 1 , wherein 10 is a texture material, 11 is a reinforcing layer, 12 is a protective layer, and 13 is a protective layer. an antireflection layer, are given the same reference numerals corresponding to FIG.

A specific example of the screen 4 shown in FIG. 3A is obtained by providing a texture material 10 as the screen 4 on the table surface 3 of the top plate 2. The texture material 10 is, for example, a light-transmitting thin plate-like material, has a pattern on the surface of natural wood or the like, and has a light diffusivity compared to the top plate 2 made of a transparent material such as glass or acrylic. Is a material having a large light reflectivity on the upper surface, and is fixed to the table surface 3 with an adhesive.

  The texture material 10 may be a cloth-like material such as a table cloth or the like as long as it is a thin material having the above-described properties. The texture material 10 is not fixed to the table surface 3. It may be provided so as to be in uniform contact therewith.

  In a specific example of the screen 4 shown in FIG. 3B, a texture material 10 is provided on a table surface 3 of the top plate 2 via a thin reinforcing layer 11 such as Japanese paper, and a protective layer 12 is provided on the upper surface of the texture material 10. It is configured to be thin. The reinforcing layer 11, the texture material 10, and the top plate 2 are fixed by an adhesive. Further, the protective layer 12 is for waterproofing the texture material 10 and preventing the texture material 10 from being scratched, and for example, if it is a strong material such as resin and can wipe off the liquid Often formed by coating or the like. The antireflection film 13 is provided on the back surface (lower surface) of the top plate 2 and prevents reflection of projection light from the projector 6 (FIG. 1). For example, an AR coating sheet is used.

  The specific example of the screen 4 shown in FIG. 3C is obtained by fixing the texture material 10 directly to the table surface 3 of the top plate 2, and the specific example shown in FIG. The protective layer 12 is provided similarly to the above. Here, the antireflection film is not provided on the back surface of the top plate 2, but the antireflection film 13 may be provided as in the specific example shown in FIG.

  In these specific examples, when an example of the thickness dimension of each part is shown, the top plate 2 is an acrylic plate having a thickness of 20 mm, the texture material 10 is a thin plate material of natural wood having a thickness of 0.3 mm, and the reinforcing layer 11 is used. Is a layer having a thickness of 0.1 mm, and the protective layer 12 is a resin coating layer having a thickness of 0.1 mm.

  FIG. 4 is a diagram showing the state of the projection light on the screen 4, where LP is the projection light from the projector 6, LP ′ is the scattered light of this projection light, Lo is the outside light, and H is the human hand. The parts corresponding to those in the previous drawings are denoted by the same reference numerals and redundant description is omitted.

  In the figure, the projection light LP from the projector 6 (FIGS. 1 and 2) is collected on the screen 4 and scattered upward (in the Z direction) from the surface of the screen 4 to emit scattered light LP ′. Accordingly, the projected image displayed on the screen 4 can be viewed not only from directly above the screen 4 but also from an obliquely upward direction, and the range of the direction in which the projected image can be viewed is expanded. Accordingly, although not shown in FIG. 1, the user can view an image displayed obliquely from above while sitting on a chair.

  Further, since the projected image is displayed on the table surface 3 on the top surface of the top plate 2, the projected image display surface (screen 4) as in the conventional example shown in FIGS. 13 (a) and 13 (b) is used. Since the parallax between the touch target position and the position on the touch surface (touch position) touched by the user can be eliminated, the user can directly touch the image with an instruction means such as a fingertip. In the case of projecting and displaying such an image, the user is given the feeling of touching the image directly. For this reason, the user can touch an image projected and displayed while sitting on a chair or the like without feeling uncomfortable.

  Furthermore, since the surface of the texture material 10 (FIG. 3) of the screen 4 has a lower light reflectance than glass or acrylic, which is the material of the top plate 2, the surface (table surface 3) of the top plate 2 is exposed. Compared to the case of the above, there is less reflection of the external light Lo from the illumination lamp 7 such as a fluorescent lamp (FIG. 1B) provided on the ceiling or the like, and the illumination lamp 7 etc. is reflected on the surface of the screen 4 The display surface does not become dazzling, and even if the top plate 2 is sufficiently thick, the projected image displayed on the screen 4 does not become difficult to see, and a clear and high-quality image can be provided.

  FIG. 5 is a diagram showing a specific example of the surface state of the screen 4 in the first embodiment, and the same reference numerals are given to the portions corresponding to the previous drawings. Here, a case where a sheet-like natural wood is used as the texture material 10 (FIG. 3) of the screen 4 is shown as an example. However, the texture material 10 is not limited to such a sheet-like natural wood, and may be any material on a sheet having the above-mentioned performance such as Japanese paper, and any material having an appropriate pattern on the surface thereof may be used. .

  FIG. 5A shows a state in which an image is not projected (A). In this case, the grain pattern of the texture material 10 can be seen on the screen 4 by light from an illumination lamp or the like ( B). Therefore, it looks to the user as if the table surface 3 of the table 1 is wooden.

  FIG. 5B shows a state (a) in which an image is projected. In this case, the projected image is displayed on the screen 4 (b). In this case, the grain pattern on the screen 4 can be seen with care. However, when the user pays attention to the image displayed on the screen 10, the light reflectance of the texture material 10 on the screen 4 can be seen. Because of the small size, the grain pattern is hardly noticeable. The broken line indicates a grain pattern that has become inconspicuous.

  Thus, when an image is not projected, that is, when the table 1 is not used as a table-type information display terminal, the table surface appears to be made of a material having a grain rather than a glass or acrylic surface. Well, it will be in line with the image of the place. In addition, even if a fingerprint remains when touched with an instruction means such as a fingertip, it may not be noticeable due to a pattern such as wood grain or due to the color of the surface, and even when an image is projected, external light such as illumination light Since the reflectance with respect to is small, even if a fingerprint is overlapped with this image, it is not conspicuous like wood grain. Therefore, a clear and high-quality projected image can be seen.

  FIG. 6 is a longitudinal sectional view in the depth direction (Y direction) showing a second embodiment of the table type information display terminal according to the present invention, wherein 1b is a partition, 14 is a video camera unit, 15 is an infrared filter, 16 is It is infrared LED, the same code | symbol is attached | subjected to the part corresponding to FIG. 1, and the overlapping description is abbreviate | omitted.

  In the figure, the screen 4 is irradiated with infrared rays Lr from a number of directions above the table 1, and the infrared rays Lr transmitted through the screen 4 are photographed by the video camera unit 15 via the infrared filter 15. Since the infrared filter 15 uses the infrared wavelength region as the transmission region and other wavelength regions as the blocking region, for example, an object such as a container or a fingertip on the screen 4 on the top plate 2 of the table 1 (instruction When the means is placed, the infrared ray is blocked by the object, and the infrared ray of the part of the object cannot reach the video camera unit 15. Thereby, the video camera unit 15 can detect the silhouette of the object.

  Note that the infrared LEDs 16 that generate the infrared rays Lr may be arranged in each part of the ceiling, and as shown in the figure, a partition 1b is provided on the back side of the table 1, and a plurality of infrared LEDs 16 are attached to the ceiling. You may make it arrange | position along the longitudinal direction (X direction) of the board 2 (accordingly, the screen 4).

  7 is a diagram showing the configuration of the system provided in the housing of the table 1 in FIG. 6, wherein 14a and 14b are video camera units, 15a and 15b are infrared filters, and 17 is a video composition unit. The parts corresponding to those in FIG.

  In the figure, also in the second embodiment, as in the first embodiment, two projectors 6a and 6b are provided, and respective images are displayed in the display areas 5a and 5b (FIG. 1) of the screen 4. Is projected and displayed. The video camera units 14a and 14b are provided for each of these display areas 5a and 5b. The video camera unit 14a takes an image of the infrared ray Lr that has passed through the display area 5a of the screen 4, and the video camera unit 14b. Takes an image of the infrared ray Lr transmitted through the display area 5b of the screen 4.

  Video signals of infrared images taken by the video camera units 14 a and 14 b are respectively supplied to the video synthesis unit 17, synthesized into a video signal of one screen, and supplied to the control unit 8. The control unit 8 performs pattern recognition processing from this video signal, and determines the type and moving direction of the object on the screen 4 that causes the silhouette. Based on the determination result, the control unit 8 controls the video signal read from the storage unit 9 and displayed on the screen 4 by the projectors 6a and 6b, and the projection video displayed on the screen 4 is displayed on this screen. 4 is changed according to the object placed on top.

  Here, the infrared LED 16 radiates infrared rays at a wide angle. The action of the infrared rays at a wide angle will be described with reference to FIG.

  8 (a1), (b1), and (c1) show the illumination state of the infrared ray Lr according to the distance of the object 18 from the upper surface of the screen 4, respectively, and are shown in FIGS. 8 (a1) and (b1). The object 18 approaches the screen 4 in order, and the state in which the object 18 is on the screen 4 is shown in FIG.

  Further, FIGS. 8A2, 8B2 and 8C2 are obtained by imaging by the video camera unit 14 (FIGS. 6 and 7) in the states of FIGS. 8A1, 8B1 and 8C1, respectively. It shows a video signal.

  First, as shown in FIG. 8 (a1), when the object 18 is away from the screen 4, the infrared ray Lr radiated at a wide angle from the infrared LED 16 directly above the object 18 irradiates the upper surface of the object 18. The side surface and the lower surface of the object 18 are not irradiated. However, for example, infrared rays radiated at a wide angle from the adjacent infrared LEDs 16a and 16b that have shifted from directly above the object 18 also enter the lower side of the lower surface of the object 18. For this reason, as shown in FIG. 8 (a2), the video signal obtained from the video camera unit 14 has a level V that decreases at the portion of the object 18. ing. Accordingly, when such a video signal is subjected to differential processing, the differential value increases in the spatial direction of level V at the edge of the portion where the level has decreased (the portion where the level decreases or increases; hereinafter referred to as the boundary portion where the level decreases). However, since the level change at the boundary of the level drop in this case is small, the obtained differential value is small.

  Next, as shown in FIG. 8 (b1), when the object 18 is closer to the screen 4 than in the case shown in FIG. 8 (a1), from the adjacent infrared LEDs 16a and 16b that enter under the lower surface of the object 18. As a result, the silhouette of the object 18 on the screen 4 becomes darker than that shown in FIG. 8 (a1). As shown in FIG. 8 (b2), the video signal is generated at the object portion. The level V of this further decreases. Then, the differential value of the level V in the spatial direction at the boundary of the level decrease becomes larger than that in the case of FIG. As the object 18 approaches from the screen 4, the differential value increases.

Then, as shown in FIG. 8 (c1), when the lower surface of the object 18 is in contact with the screen 4 and the object 18 gets on the screen 4, no infrared rays enter under the object 18, so the object 18 on the screen 4 is removed. As shown in FIG. 8 (c2), the video signal level V at that portion becomes almost zero, and the differential value at the boundary of the level drop to level V = 0 is also obtained. As is clear from FIG. 8 (c2), it is larger than that in FIG. 8 (b2). Further, as shown in FIGS. 8 (a2) to (c2), a threshold value VT having a level close to level V = 0 is set, and this is compared with the level V of the video signal. As shown in FIG. 8, when the object 18 is in contact with the screen 4, the level V of the video signal in this portion is V <VT as shown in FIG. 8 (c2).

  In this way, it is possible to determine whether the object 18 is approaching or moving away from the screen 4 based on the change in the differential value of the boundary portion of the video signal level drop, and the threshold value VT close to the level V = 0. Thus, it can be determined that the object 18 is on the screen 4.

Note that the size of the cross-sectional area and the shape of the lower surface of the object riding on the screen 4 can be determined by the size and shape of the silhouette on the screen 4, and the position of the silhouette on the screen 4 can also be determined. By using a target table (table) in which the size and shape of the silhouette are associated with the object 18 such as a finger and a cup, the size and shape of the silhouette when the object 18 is on the screen 4. By detecting this, the type of the object 18 can also be determined.

  As is clear from FIG. 8, as the height of the object 18 is higher, a region where the infrared rays from the infrared LED 16 near the object 18 are blocked becomes wider. However, the infrared rays from the surrounding infrared LEDs 16a and 16b are transmitted through the screen 4 in the same region. Therefore, the higher the height of the object 18, the smaller the differential value of the boundary portion of the video signal level drop when placed on the screen 4. This also makes it possible to estimate the type of the object.

  Therefore, when it is detected that the level-decreasing portion of the video signal is equal to or less than the threshold value VT and the object 18 detected to have touched the screen 4 is determined as an instruction means such as a fingertip, the screen 4 The display operation corresponding to the touched portion can be performed on the assumption that the display image on the top is touched by an instruction means such as a fingertip and some designation is made. For example, when a menu screen or a game screen is displayed on the screen 4, when a predetermined position on the screen is touched with an instruction means such as a fingertip, a screen display corresponding to the touch position is performed.

  Also, when a cup or the like is placed on the screen 4, it is determined that it is not specified, and the video of the portion is distorted so that the image displayed with this cup is not hidden. The part displayed below can also be displayed on the outside of this cup or the like. Such processing is performed by the control unit 8.

  Next, a third embodiment of the table type information display terminal according to the present invention will be described. The third embodiment is characterized by a screen 4 on which an image is projected from a projector, and other configurations are the same as those of the first and second embodiments.

  FIG. 9 is a longitudinal sectional view (along the X direction) of the screen 4 in the third embodiment, 19 is a compensation layer, and portions corresponding to FIG. Description is omitted.

  In the same figure, the screen 4 is obtained by providing a compensation layer 19 on the back surface (surface on the top plate 2 side) of the texture material 10 on the screen 4 shown in FIG. This compensation layer 19 compensates for the difference in light transmittance between the pattern portion of the textured material 10 on which a pattern such as wood grain is drawn and the other ground portion, and the entire screen 4 has a substantially uniform light transmittance. It is intended to have. Therefore, on the surface of the compensation layer 19, the same pattern that is bright and dark with respect to the pattern of the texture material 10 is drawn.

  Here, the screen 4 made of the textured material 10 provided with the compensation layer 19 is directly attached to the top plate 2, but it is attached via the reinforcing layer 11 as shown in FIG. Alternatively, the upper surface of the textured material 10 may be covered with a protective layer 12 as shown in FIGS.

  FIG. 10 shows a specific example of the screen 4 when a sheet-like natural wood is used as the texture material 10, wherein FIG. 10 (a) is a front view, FIG. 10 (b) is a back view, and FIG. (C) is a cross-sectional view, and 10a and 19a are streaks.

  In this specific example, on the surface of the screen 4, as shown in FIG. 10A, a wood grain is shown on the surface, and the streak portion 10 a forming this wood grain has a light transmittance as compared with other parts. Is low. For this reason, as in the first and second embodiments, when the projection light is transmitted only through the sheet of natural wood, the grain appears slightly superimposed on the projected image. become.

  Therefore, in this specific example, a compensation layer 19 is drawn in which the same grain pattern as the texture material 10 made of such a natural wood sheet is drawn, and the grain pattern of the texture material 10 has a relationship in which the transmittance is inverted. Is pasted on the back surface of the texture material 10. FIG. 10B shows the back surface side of the screen 4 in which the compensation layer 19 is attached to the back surface of the texture material 10 as described above, and the compensation layer 19 appears. In the compensation layer 19, the light transmittance is higher in the grain-patterned streaks 19 a than in other portions.

  As shown in FIG. 10C, when the compensation layer 19 is pasted on the back surface of the texture material 10, the streaks 10 a of the grain of the texture material 10 extend from the front surface to the back surface of the texture material 10. The compensation layer 19 is bonded to the back surface of the textured material 10 so that the wood grain streaks 19a of the compensation layer 19 match the 10 wood streaks 10a. As a result, the light transmittance of the streaks 10a of the textured material 10 hardly changes depending on the streaks 19a of the grain pattern of the compensation layer 19, and portions other than the streaks 10a of the textured material 10 are compensated. The light transmittance is reduced by portions other than the streaks 19a of the layer 19 in the layer 19, and the light transmittance of the scribing 4 becomes substantially uniform as a whole.

Therefore, in the third embodiment of the table type information display terminal provided with such a screen 4, as shown in FIG. 11A, when an image is projected from a projector (not shown), the screen 4 has the screen shown in FIG. As shown in FIG. 5B, compared with the case of FIGS. 5B and 5B when the compensation layer 19 is not provided, the wood grain pattern of the texture material 10 on the screen 4 becomes less conspicuous, and a clearer projected image is obtained. Will be obtained.

  FIG. 12 shows another specific example of the screen 4 when a material other than natural wood such as Japanese paper is used as the texture material 10. FIG. 12 (a) is a front view, and FIG. The figure and the figure (c) are sectional views.

  In this specific example, for example, a lattice-like pattern is printed on the surface of the texture material 10 such as Japanese paper on the screen 4, and as shown in FIG. A pattern is shown, and the streaks 10a forming the lattice of this pattern have lower light transmittance than other parts. For this reason, as in the first and second embodiments described above, when the projection light is allowed to pass only through the textured material 10, such a pattern appears to be superimposed on the projected image, albeit slightly. Become.

  Therefore, in this specific example, the compensation material 19 having the same pattern as that of the texture material 10 is drawn (printed) and the transmittance is reversed with respect to the pattern of the texture material 10. Paste on the back of the. FIG. 12B shows the back side of the screen 4 in which the compensation layer 19 is attached to the back side of the texture material 10 as described above, and the compensation layer 19 appears. In the compensation layer 19, the light transmittance is higher in the streaks 19a of the pattern than in the other portions.

  As shown in FIG. 12C, when the compensation layer 19 is bonded to the back surface of the texture material 10, the streaks 10 a of the pattern of the texture material 10 are only on the surface of the texture material 10. The compensation layer 19 is bonded to the back surface of the textured material 10 so that the streaks 19a of the compensation layer 19 coincide with the streaks 10a of the pattern. Thereby, the light transmittance of the streaks 10a of the textured material 10 pattern is hardly changed by the pattern streaks 19a of the compensation layer 19, and the portions other than the streaks 10a of the textured material 10 pattern are formed in the compensation layer. The light transmittance is reduced by portions other than the 19 streaks 19a of the pattern, and the light transmittance of the screw 4 is substantially uniform as a whole.

  In this way, in this specific example, as in the specific example shown in FIG. 10, the texture on the screen 4 is further improved as compared with the case of FIGS. 5B and 5B when the compensation layer 19 is not provided. The pattern of the material 10 becomes inconspicuous, and a clearer projected image can be obtained.

  In this specific example, similarly to the specific example shown in FIG. 10, as shown in FIG. 3 (b), it may be pasted through the reinforcing layer 11, or in FIG. As shown in (c), the upper surface of the texture material 10 may be covered with a protective layer 12.

It is a block diagram which shows 1st Embodiment of the table-type information display terminal by this invention . It is a figure which shows the structure of the system provided in the table in FIG. It is sectional drawing which shows the specific example of the screen provided in the top plate in FIG. It is a figure which shows the state of the projection light on the screen shown in FIG. It is a diagram showing a specific example of a surface state of the screen in the first embodiment shown in FIG. It is sectional drawing which shows 2nd Embodiment of the table-type information display terminal by this invention . It is a figure which shows the structure of the system provided in the table in FIG. It is a figure which shows the infrared wide-angle radiation | emission from infrared LED in 2nd Embodiment shown in FIG. It is sectional drawing which shows the structure of the screen in 3rd Embodiment of the table-type information display terminal by this invention. It is a figure which shows one specific example of the screen shown in FIG. It is a figure which shows the display state of the projection image by the screen shown in FIG. It is a figure which shows the other specific example of the screen shown in FIG. It is a figure which shows the principal part of the conventional table-type information display terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Table 2 Top plate 3 Table surface 4 Screen 5, 5a, 5b Display area 6, 6a, 6b Projector 7 Illumination lamp 8 Control part 9 Memory | storage part 10 Texture material 10a Muscle part 11 Reinforcement layer 12 Protective layer 13 Antireflection layer 14, 14a, 14b Video camera section 15, 15a, 15b Infrared filter 16 Infrared LED
17 Image composition part 19 Compensation layer 19a Muscle part

Claims (5)

The table top is made of thick transparent material,
On the top surface of the top plate, a light transmissive sheet-like screen made of a material having a high light diffusivity compared to the top plate and a low light reflectance on the upper surface is disposed,
A projector is provided in the table,
A table type information display terminal configured to project an image so as to be condensed on the screen from the projector and to display the projected image on the top surface of the top plate . In claim 1,
A light source for irradiating the screen with light in a specific wavelength region from above the screen;
A video camera unit that is provided in the table and shoots light in the specific wavelength region that has passed through the screen;
Means for detecting information on an object blocking the light in the specific wavelength region on the screen from an image signal obtained by photographing by the video camera unit, and recognizing the position of the object and the object relative to the screen. A table type information display terminal characterized by that. In claim 1 or 2,
A table type information display terminal characterized in that a pattern is provided on the upper surface of the screen , and the pattern is visible when the image is not projected . In claim 1, 2 or 3 ,
The table-type information display terminal, wherein the screen is a sheet-like natural wood or a cloth-like or paper-like material on which a pattern is printed. In claim 3 or 4,
On the lower surface of the screen, a same pattern as the pattern, the table-type information display terminal, characterized in that the pattern to compensate for variations in the light transmittance at the screen by the pattern is provided.

Images