JP2002016823A - Presentation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a presentation device which can perform the presentation of material, data, etc., easily and simply, and also does not interfere with the visual range of a viewer. SOLUTION: An image pickup unit 2 which has a manuscript stand 21 provided in the same plane as the topside of a table is buried in the table 1 for conference, and a projective display 3 which projects the image read with an image pickup unit 2 or the image converted from the image signal inputted separately into a liquid-crystal drive signal and displayed on a liquid-crystal panel on a screen through a projective optical system is installed in the specified position of this table 1 or outside the table 1. So, this presentation device does not interfere with the visual range of a viewer, and also the viewer can use this as a usual table when the viewer does not use the image pickup unit 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a presentation apparatus capable of enlarging and projecting an opaque document as it is, and more particularly, to embedding an imaging unit in a conference table so as to enlarge and project without interrupting the field of view of a viewer. The present invention relates to a presentation device capable of performing the following.

[0002]

2. Description of the Related Art Recently, as a presentation device used for a conference or a lecture at a university, there is a document camera capable of enlarging and projecting an opaque document without using a conventional transparent sheet. A document camera can be roughly divided into two types. In the first mode, a TV camera and a lighting device for illuminating a document are provided on a support standing on the document table so as to face the document table, and the document is imaged by the TV camera. Some projectors project imaged contents on a screen by a projection display device.

A document camera of the second embodiment is configured such that a document surface of a document set face down on a document table is illuminated by illumination inside a housing, and an image is taken by a TV camera. The image is projected on the screen by the display device. (For example, Japanese Patent Application Laid-Open No. 7-104713
No.). Such a configuration is employed because an image can be captured without being affected by external light.

[0004]

When a presentation is made using such a device, the document camera of the first embodiment is used to set materials and data to be presented in the field of view of the TV camera. When the projection screen is temporarily difficult to see for the viewer because the hands and the like are projected together, or the object to be photographed is thick, it is necessary to adjust the focus of the TV camera each time. Further, it is necessary to adjust the aperture of the TV camera according to the surrounding brightness. Furthermore, since the document camera is installed and used on a table, it tends to hinder the viewer's view,
There is no other choice but to share in a multi-person meeting, and the efficiency of the meeting is impaired.

On the other hand, in the document camera of the second embodiment, the hand is hardly reflected, and it is not necessary to adjust the focus and aperture of the TV camera. There was a problem that it hindered the viewer's view.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a presentation device which can easily and simply present materials and data and does not hinder a viewer's view. With the goal.

[0007]

According to a first aspect of the present invention, there is provided a presentation apparatus comprising: a table; a transparent body embedded at a predetermined position of the table and provided flush with an upper surface of the table; At least one image pickup unit having a document table consisting of: a liquid crystal panel which converts a video read at the predetermined position of the table or outside the table by the image pickup unit or a video signal separately input into a liquid crystal drive signal and a liquid crystal panel And a projection type display device for projecting image light obtained by irradiating the displayed image with light from a light source onto a screen via a projection optical system. According to the present invention, since the imaging unit is embedded in the table, it does not hinder the field of view of the viewer, and can be used as an ordinary table when the imaging unit is not used.

According to a second aspect of the present invention, the image pickup unit according to the first aspect of the present invention includes a platen made of a rectangular transparent body horizontally disposed on an upper surface of a housing, and a platen substantially parallel to at least two sides of the platen. At least one pair of document illuminations provided inside the housing so as to illuminate the lower surface of the glass, and are arranged so as to face the lower surface of the document table inside the housing so as to be inclined and reflect incident light from the surface of the document table horizontally. And an image pickup device provided inside the housing and configured to convert reflected light from the total reflection mirror into an image signal. According to the present invention, there is almost no reflection of the hand,
Also, there is no need to adjust the focus of the image sensor or the aperture.

A third invention comprises a communication controller for transmitting a video signal read by the imaging unit in the presentation device according to the first or second invention to another projection display device via a communication line. It is characterized by that. According to the present invention, a captured video can be transmitted to a remote place and displayed.

[0010]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a presentation device showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a conference table (legs are omitted for simplicity of the drawing), 2 denotes an imaging unit, and 3 denotes a projection display device.

The image pickup unit 2 includes a document table 21 made of a transparent material such as transparent glass or plastic for setting an opaque document 4, a pair of document lights 22 such as a fluorescent lamp for illuminating the document 4, A total reflection mirror 23 for reflecting light from the light source 4 over the entire visible region, and a total reflection mirror 23
And an image sensor 24 such as a CCD camera that converts incident light from the camera into an analog image signal. The analog image signal output from the image sensor 24 is a projection display device installed on the conference table 1. The image signal is converted into optical information and projected on a screen (not shown).

Note that the projection type display device 3 is not set on the table 1 but is set on the table 1 as shown by a broken line in FIG.
If it is installed on the lower surface of the camera, it does not obstruct the view more. 2
Reference numeral 5 denotes a hand switch for activating the imaging unit 2 when a viewer makes a presentation. When the hand switch 25 is turned on, the coaxial relay switch 26 is closed, and the analog image of the original 4 is displayed on the projection display device 3. A signal is output. Although not shown, it is convenient and convenient to operate the driving power supply of the imaging unit 2 by using the hand switch 25.

FIG. 2 is a circuit diagram in the case where one projection type display device 3 is provided with a plurality of imaging units 2. In this figure, 2a, 2b... 2n are imaging units, which are connected to the projection display device 3 via coaxial relay switches 26a, 26b. .. 2n are provided with hand switches 25a, 25b... 25n, respectively. By turning on these hand switches 25a, 25b.
26n are closed and the imaging units 2a, 2b.
The n analog image signals can be output to the projection display device 3.

Next, as an operation of such a presentation device, a case where the document 1 is enlarged and projected will be described. The user of the imaging unit 2a, 2b or 2n
The user turns on the hand switch 25a, 25b or 25n of the imaging unit 2a, 2b or 2n. When the hand switches 25a, 25b, or 25n are turned on, the coaxial relay switches 26a, 26b, or 26n to which the hand switches 25a, 25b, or 25n are connected are closed, and the image signals of the imaging units 2a, 2b, or 2n are projected. Output can be made to the display device 3.

Then, the document 4 is placed on the document table 21 face down. The document surface (lower surface) of the document 4 is illuminated by the document illumination 22, and the total reflection mirror 23 reflects light from the set document 4 and makes the light enter the image sensor 24.

The image sensor 24 converts the incident light into an analog image signal and outputs it to the projection display device 3.
The projection display device 3 converts the input analog image signal into optical information and projects it on a screen (not shown). In this way, the contents of the original 4 can be
a, 2b or 2n can be used for enlarged projection.

As described above, according to the present invention, a plurality of image pickup units 2a, 2b... 2n are buried in the conference table 1 and output to one projection display device 3 to provide a viewer with a visual field. Presentations can be made promptly without interruption. Although not shown, a communication controller is provided between the coaxial relay switches 26a, 26b.
The video signal read by the imaging units 2a, 2b... 2n is transmitted to a projection display device installed at another place via a communication line to enlarge and project the contents of the document 4, thereby realizing a TV. Can be used for conference systems.

[0018]

According to the present invention, a plurality of image pickup units are buried in a conference table and output to a single projection display device, so that a presentation can be made promptly at any time. In addition, since the conference table and the upper surface of the document table of the imaging unit are flush with each other, they do not hinder the field of view of the viewer, and can be used as an ordinary table when the imaging unit is not used.

Since the image pickup unit illuminates the original surface from below and converts the reflected light into an image signal by the image pickup device inside the housing, there is almost no reflection of the hand, and the focus adjustment and the aperture adjustment of the image pickup device are performed. Also, the manuscript can be easily displayed without any need.

Further, since the video signal read by the image pickup unit can be transmitted to another projection display device via a communication line, the captured video can be transmitted to a remote place for display, and a TV conference system can be provided. And so on.

[Brief description of the drawings]

FIG. 1 is a block diagram of a presentation device showing an embodiment of the present invention.

FIG. 2 is a circuit diagram when a plurality of imaging units are provided for one projection display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Conference table 2 ... Image pick-up unit 3 ... Projection display device 21 ... Document table 22 ... Document light 23 ... Total reflection mirror 24 ... Image sensor 25 ... Hand switch 26 ... Coaxial relay switch

Claims (3)

[Claims] 1. A table, at least one image pickup unit buried in a predetermined position of the table and having a document plate made of a transparent body provided flush with an upper surface of the table, and a predetermined position of the table or the An image light obtained by converting an image read by the image pickup unit or an image signal separately input into a liquid crystal drive signal which is installed outside the table and displayed on a liquid crystal panel, and illuminating the displayed image with light from a light source. And a projection type display device for projecting the image on a screen via a projection optical system. 2. The image pickup unit according to claim 1, wherein the document table is formed of a rectangular transparent body horizontally disposed on an upper surface of the case, and the case is arranged to illuminate the lower surface of the glass substantially parallel to at least two sides of the document table. At least one pair of document illuminations provided inside the body, a total reflection mirror arranged to be inclined to the lower surface of the document table inside the housing, and reflecting incident light from the document table surface in the horizontal direction; 2. The presentation device according to claim 1, further comprising: an imaging device provided inside the body for converting light reflected from the total reflection mirror into an image signal. 3. The presentation device according to claim 1, further comprising a communication controller configured to transmit a video signal read by the imaging unit to another projection display device via a communication line. .