JP2003015216A - Projection equipped with camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection equipped with a camera which is simply constituted without making a set large in size, is easy to use, and whose operability is improved. SOLUTION: The projection 1 equipped with a camera is provided with a photographing camera for photographing an object 6, and a projector body 2 with the photographing camera arranged on the bottom side and for converting an image signal emitted from the photographing camera to image light, then, enlarging and projecting the image light through a projection lens 3, and the projector 1 equipped with a camera is constituted so that the object placed on the bottom side of the projector body 2 can be photographed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-equipped projector for picking up an image-pickup object such as a document and enlarging and projecting the picked-up image on a screen, and more particularly to a camera-equipped projector which is easy to use and has improved operability. .

[0002]

2. Description of the Related Art Conventionally, a projector with a camera, which is capable of capturing an image of an imaged object such as a document placed on a writing desk and projecting the imaged image signal by the projector, has been widely used for presentations.

This type of projector with a camera is
Since it is possible to easily capture and display an imaged object such as a document or model without having to prepare a PC, it is widely used for paper resource reduction and presentation.
It is a particularly effective system for use in conference rooms and educational facilities.

The projectors with a camera that are currently in practical use are roughly classified into the following two types.

The first type is a type in which a subject is placed on the top surface of the projector section or on a side table, and a photographing camera is arranged above the subject via an arm.

The second type is provided with a projector whose top surface is formed as a glass platen, a subject is placed upside down on the platen of the projector, and an image is taken by a photographing camera built in the projector body. is there.

However, although such a type of projector with a camera is a particularly effective system for presentations, it has a problem in terms of usability.

For example, the first type requires a camera holding arm member for disposing the photographing camera away from the subject. However, the camera holding arm member has a structure that ensures rigidity. It is difficult to simplify, and the work of expanding and contracting the arm is complicated. In addition, it is difficult to take measures against the radiation because the wiring to the shooting camera is long. Further, it is necessary to dispose the document illumination above the set of the projector section, but since this document illumination needs to give a sufficient amount of light to the subject, the light source section of the document illumination should emit considerably bright light. Therefore, if the light source section comes into the visual field directly due to this influence, it may be dazzling and physiologically unpleasant for a user who uses it in a dark place.

On the other hand, in the case of the second type, the original is turned upside down and the glass table (original table) of the projector is used.
Since the original is placed on the paper, it is easy to make a mistake in the direction in which the original is placed, and there is the inconvenience that the original cannot be directly marked or pointed. In addition, there is a problem in that an increase in size of the set cannot be avoided because there is a limit to reducing the distance between the photographing camera and the subject structurally.

FIG. 4 shows an example of a conventional projector with a camera of the first type. FIG. 4 is a perspective view showing the overall configuration of a projector with a camera of this type.

As shown in FIG. 4, a projector 50 with a camera is provided for holding a projector section 51 whose upper surface is configured as a document table on which a subject is placed, and a photographing camera 55 for photographing the subject placed on the document table. A camera holding member 54 and an arm member 53 attached to the back surface of the projector unit 51 opposite to the projection surface and having the camera holding member 54 and the document illumination unit 56 attached at predetermined positions. There is.

The projector 51 is provided with a projection lens 52 on the front side of the side surface, and projects a photographed image photographed by a photographing camera 55 arranged above the projector 51 toward a screen (not shown) in an enlarged manner. .

The arm member 53 includes a first arm member 53a mounted on the main body of the projector 51 and a second arm member 53b rotatably attached to the first arm member 53a via a hinge portion 53c. And the second arm member 5
The camera holding member 54 is rotatably attached to the tip portion of 3b. A document illumination unit 56 is fixed near the hinge portion 53c of the first arm member 53a.

When projecting a photographed image, a subject is placed on the original table of the projector 51, the second arm member 53b is rotated via the hinge portion 53c, and the camera holding member 54 is appropriately rotated. By adjusting, the photographing camera 55 can be moved to the optimum photographing position for the subject. In this way, the subject is photographed, and the photographed content is enlarged and projected on a screen (not shown).

[0015]

As described above, in the conventional projector with a camera of the first type, since the photographing camera is arranged above the projector, the photographing camera is held. There is a problem that it is difficult to simplify the structure of the arm holding portion and it is difficult to operate. Also, in the second type of projector with a camera, since the original is placed upside down and placed on the glass surface of the projector for photographing, it is easy to make a mistake in the direction in which the original is placed. There was also a problem in that the size of the set was unavoidably structurally inevitable.

As a prior art of this kind, Japanese Patent Laid-Open No. 10-6
There is a liquid crystal projector described in Japanese Patent No. 2867. In this example, a shooting lens is provided in the projector body, a door is rotatably provided in the projector body, a mirror is attached to the inner surface of the door, and a subject is imaged through the mirror when the door is opened. Is the way to do it. With this configuration, the image pickup camera is mounted in the projector main body, which is suitable for downsizing, but it is not satisfactory for presentation, and usability and operability have not been improved.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a camera-equipped projector which is easy to use and has improved operability with a simple structure without increasing the size of the set. And

[0018]

A projector with a camera according to the present invention includes a photographing camera for picking up an image of an object to be imaged,
In a projector with a camera, which includes a projector main body for processing a video signal captured by the shooting camera, converting the video signal into image light, and enlarging and projecting through a projection lens, the shooting camera is arranged on a bottom surface side of the projector main body. The image pickup target placed on the bottom side of the projector body can be picked up.

According to the present invention, by disposing the photographing camera on the bottom surface side of the projector main body, it is possible to easily pick up an image of the image pickup target placed under the projector main body and project and display the picked-up image. it can.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall structure of a projector with a camera according to a first embodiment of the present invention.

In the projector with a camera of this embodiment, the photographing camera is arranged on the bottom side of the projector main body, and the projector main body is separated from the subject by a predetermined distance (for example, the closest photographing distance of the photographing camera). It is characterized in that a projector holding mechanism (holding table) for disposing is provided.

Specifically, as shown in FIG. 1, a projector 1 with a camera has a projector main body in which a photographing camera (not shown) and an illuminating unit 5 for illuminating an original or the like are arranged on the bottom side inside the main body. 2 and a holder 7 for arranging the projector main body 2 above the subject 6 with a predetermined distance therebetween.

The projector body 2 has a projection lens 3 on one side surface. Further, an optical system is provided in the projector main body 2, and a liquid crystal panel or the like is driven by a video signal picked up by the photographing camera or a video signal supplied through a video signal input unit (not shown), and this liquid crystal panel is driven. The light emitted from the light source is irradiated onto the screen, and the modulated outgoing light from the liquid crystal panel is enlarged and projected onto the screen (not shown) via the projection lens 3.

Further, the projector main body 2 has a photographing camera built into the inside of the main body on the bottom side, and is arranged downward so that the photographing lens 4 of the photographing camera is exposed from the bottom surface.

In the vicinity of the taking lens 4 on the bottom side of the projector main body 2, a subject 6 placed on a table 8 is placed.
The illumination unit 5 for illuminating the
A transparent cover is attached to the bottom side so as to cover the.

The light source lamp of the illumination unit 5 is provided in the projector body 2, and the light emitted from this light source illuminates the subject 6 on the table 8 located below through the transparent cover. As the light source, a light source that can irradiate with a light amount necessary for use in a dark room is used.

On the other hand, the holding table 7 is a holding member for arranging the projector main body 2 above the document table 6 by a predetermined recording distance (for example, the closest photographing distance of the photographing camera). The holding base 7 is composed of, for example, a pair of U-shaped rod members 7a and 7b, and these rod members 7a and 7b are provided side by side on the lower surface of the projector main body 2. The projector main body 2 is mounted on.

In this case, the first and second rod members 7a and 7b of the holding table 7 are arranged side by side so as not to block the photographing optical path of the photographing lens 4.

The holding table 7 is not limited to the shapes of the first and second rod members 7a and 7b described above, but holds the projector body 2 above the subject 6 and takes a photographic optical path by the photographic lens 4. Any shape may be used so long as it does not block the illumination light from the illumination section 5. In this case, it is necessary to have an appropriately safe structure so that the projector main body 2 does not fall off and fall, and also in terms of strength, it is necessary to consider a structure, material, etc. that can obtain a predetermined strength. In addition, the subject 6 placed on the table 8 by the user
It is also necessary to form a space in which the user can point the finger or can mark the material (original) as the subject.

In the present embodiment, when the camera-equipped projector 1 is used, the taking lens 4 above the subject 6 is used.
The subject (document etc.) 6 placed on the table 8
Is imaged and the imaged video signal is processed in the projector 2.

Thereafter, the photographed video signal is optically modulated by a light modulating means such as a liquid crystal panel, and then the image light is enlarged and projected onto a screen (not shown) through the projection lens 3 and placed on the table 8. Subject (original) 6
You can view the projection image of.

In this case, the projector body 2 is held by the holder 7.
Since the structure is such that the subject 6 is held above the subject 6 and the subject 6 on the table 8 is photographed through the photographing lens 4 arranged on the bottom side, it is not necessary to place the document or the like as the subject upside down. good. Therefore, it becomes easy to point an original or the like (material) or mark the original or the like. In addition, since the space is provided on the subject 6, it becomes easy for the user to point the document or the like and perform marking work.

Further, since the illumination unit 5 for illuminating the subject 6 is arranged on the bottom side of the projector body 2, it is possible to prevent the illumination light from entering the user's visual field due to the light shielding by the projector body 2. This makes it possible to give a presentation smoothly.

Therefore, according to the projector with a camera of the present embodiment, it is easy to use and the operability can be improved. Further, since the photographing camera and the illumination unit 5 are mounted inside the projector main body 2, the wiring is short and can be wired inside the main body, so that the wiring work can be simplified and the countermeasure for the projection is prevented. Will also be easier. Furthermore, since the distance between the subject and the taking lens can be shortened, the size of the set can be prevented from increasing, which greatly contributes to the size reduction of the set.

FIG. 2 is a perspective view showing the structure of a projector with a camera according to a second embodiment of the present invention.
FIG. 2A shows an example in which the projector main body and the holding table are separable from each other, and FIG. 2B shows a folding type holding table. In FIG. 2, the same components as those in FIG. 1 are designated by the same reference numerals, and only different portions will be described.

The present embodiment is characterized in that the projector main body 2A and the holding base 7A are separable from each other and the holding base 7A is foldable for the convenience of storage and carrying. is there.

That is, in the projector 1A with a camera shown in FIG. 2A, the projector main body 2A and the holding base 7A are detachable. The projector main body 2A has a convex portion 2a provided at a predetermined position on the bottom surface, and the convex portion 2a can be fitted into a mounting hole (not shown) provided at a predetermined position of the holding base 7A. In addition, the projector body 2A is
The illumination unit 5 is not mounted, and the illumination unit 5 is provided at a predetermined position on the second rod member 7d of the holding table 7A.

On the other hand, the holder 7A is of a foldable type, and has a pair of U-shaped first and second rod members 7c and 7d, and the first and second rod members 7c and 7c. 7d and a folding guide member 7e for folding.

The first and second rod members 7c. Three mounting holes for fitting the mounting holes 2a of the projector main body 2A described above are formed at predetermined positions of 7d.

The folding guide member 7e is composed of a pair of guide members. The center portion of each guide member is pivotally supported and each end portion is a U-shaped portion of the two rod members 7c, 7d. It is installed.

Therefore, since the holding table 7A is provided with such a folding mechanism, the first and second rod members 7c and 7d can be folded as shown in FIG. 2B, and the projector main body can be folded. By storing it in the storage bag 9 together with 2A, the convenience of storage and carrying can be achieved.

Further, the holding table 7A of the present embodiment is provided with the illumination section 5 in the second rod member 7d so that the vicinity of the document table 6 (see FIG. 1) can be illuminated brightly. Has become. Note that the illumination unit 5 may be arranged on the bottom surface of the projector body 2 as in the above embodiment.

Therefore, according to the present embodiment, in addition to the same effect as that of the first embodiment, the projector main body 2A and the holding base 7A can be separated from each other, and the holding base can be further separated. By making 7A foldable, it becomes possible to facilitate storage and portability.

Incidentally, in the present embodiment, the holding table 7A
The folding structure of the folding guide member 7e is as follows.
The holding table 7 is not limited to the above, but can be held securely and safely.
Any structure may be used as long as A can be folded.

Next, FIG. 3 is a perspective view showing the overall construction of a projector with a camera according to a third embodiment of the present invention. In FIG. 3, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Only different portions will be described.

The present embodiment is characterized in that the subject is improved so that the subject can be enlarged or reduced in size without increasing the size of the set.

As shown in FIG. 3, the projector 1B with a camera according to the present embodiment is provided with a holding table 7B having an adjusting mechanism 10 for enlarging and reducing an object.

The holding table 7B is mounted so as to be vertically slidable between a pair of U-shaped first and second rod members 7f and 7g and the first and second rod members 7c and 7d. The manuscript table 10a is provided with an adjusting mechanism 10 for freely moving the taking table 4a with respect to the taking lens 4 to adjust the distance between the taking lens 4 and the subject.

The adjusting mechanism 10 is provided with a user-adjustable knob 10.
It has a drive transmission means (not shown) that allows the original table 10a to be slid vertically along the first and second rod members 7f and 7g by operating b.

Therefore, the user can appropriately rotate the adjusting knob 10b to move the document table 10a with respect to the photographing lens 4 in the direction of the arrow in the figure, so that the subject 6 placed on the document table 10a can be moved. Expansion. It is possible to take a reduced image.

In the present embodiment, the adjusting mechanism 1
0 indicates that the original table 10 is rotated based on the rotating operation of the adjusting knob 10b.
Although the manual adjustment mechanism has been described by moving a in the up and down direction, if necessary, an operation button that changes to the adjustment knob 10b is provided, and a motor or the like that moves the document table 10a by operating this operation button is driven. A means may be provided to electrically adjust the movement of the document table 10a.

Further, a detecting section for detecting the distance between the original table 10a and the taking lens 4 is provided in the adjusting mechanism 10, and the focus adjustment of the taking lens 4 is executed based on the detection result from this detecting section. Is also good.

Therefore, according to the present embodiment, in addition to the same effect as that of the first embodiment, the original table 10a is freely moved up and down with respect to the taking lens 4 on the holding table 7B. By configuring the adjustment mechanism 10 of
You can take pictures of a subject in an enlarged or reduced size without increasing the size of the set. As a result, the shooting lens that shoots the subject can use a fixed-focus shooting lens without using a zoom lens that can change the angle of view of the lens, and the screen is distorted due to the use of the zoom lens. There is no problem of being easy, and the cost can be reduced.

The present invention is not limited to the above-mentioned first to third embodiments, and the combinations and applications of the respective embodiments are also applied to the present invention.

Further, in each of the embodiments according to the present invention, an input / output terminal for taking in not only the video signal obtained by the image pickup of the shooting camera but also the video signal from the personal computer or the video equipment is provided. The image light based on the image signal taken in from the terminal may be enlarged and projected.

[0057]

As described above, according to the present invention, it is possible to realize a projector with a camera which is easy to use and has improved operability with a simple structure without increasing the size of the set.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a projector with a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a projector with a camera according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a projector with a camera according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a conventional projector with a camera.

[Explanation of symbols]

1 ... Projector with camera, 2 ... Projector body, 3 ... Projection lens, 4 ... Shooting lens, 5 ... Illumination part, 6 ... Subject, 7 ... holding table, 7a ... the first rod member, 7b ... second rod member, 8 ... table.

Claims (5)

[Claims] 1. A photographing camera for photographing an object to be imaged,
In a projector with a camera including a projector main body that processes a video signal captured by the shooting camera, converts the video signal into video light, and enlarges and projects through a projection lens, the shooting camera is arranged on a bottom surface side of the projector main body, A projector with a camera, which is capable of capturing an image of an object to be imaged placed on the bottom side of the projector body. 2. A photographing camera for picking up an image of an object to be imaged,
In a projector with a camera including a projector main body that processes a video signal captured by the shooting camera, converts the video signal into video light, and enlarges and projects through a projection lens, the shooting camera is arranged on a bottom surface side of the projector main body. A projector with a camera, comprising: a holding member for disposing the projector main body above the image pickup target at a predetermined distance in a state in which the image can be picked up by the photographing camera. 3. The projector with a camera according to claim 2, wherein the holding member is detachable from the projector body and is foldable. 4. A document table is attached to the holding member, the document table is movable in the optical axis direction of the photographing camera, and the imaging magnification is changed by changing the distance between the photographing camera and the imaging target. The projector with a camera according to claim 2, wherein the projector is variable. 5. A photographing camera for photographing an object to be imaged,
A projector with a camera, which includes a projector main body for processing a video signal captured by the shooting camera, converting the video signal into video light, and enlarging and projecting the light through a projection lens, wherein the shooting camera and the imaging are provided on a bottom surface side of the projector main body. A projector with a camera, characterized in that an illumination light source necessary for capturing an image of an object is arranged so that an image of the imaged object placed on the bottom side of the projector body can be imaged.