JPH0746832B2 - Image reader - Google Patents

Description

The present invention relates to an image reading device, and more particularly to an image reading device in which a camera having a photoelectric conversion unit is rotatably supported by a supporting member on an image mounting table. .

[Prior Art] In a conventional image reading apparatus, for example, a sheet manuscript, a photograph, a book, a three-dimensional object, and an object to be read such as a negative or positive film are placed and read on a mounting table. However, a camera having a rotatable camera part is commercially available so that it is possible to read a record of an image or the like from an object to be read that is not placed on a mounting table, for example, a blackboard held on a wall.

However, the conventional image reading apparatus having such a function has a drawback in that if an image captured by the camera is output to the monitor display unit while the camera is rotating, the image moves abnormally and is significantly unsightly. .

[Problems to be Solved by the Invention] An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a simple structure.
While the camera is rotating, output the image to the monitor display,
For example, it is to provide an image reading device that can be cut off or at least lowered so as not to be unsightly.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides a mounting table on which an object to be read can be mounted, and an image of the object to be read, which is movably supported by the mounting table. In the image reading device having an image pickup means for outputting a video signal and a monitor display section for outputting an image of the read article by the video signal, the image pickup means is a reading article placed on the mounting table. When the first position capable of capturing an image or the second position capable of capturing an object to be read other than on the mounting table is positioned, a display corresponding to the video signal output from the image capturing means is displayed on the monitor display unit. When the image pickup unit is located between the first position and the second position, it is prohibited to display on the monitor display unit according to the video signal output from the image pickup unit. Control to control It is characterized by having means.

[Operation] According to the present invention, the imaging unit is located at the first position where the reading object placed on the mounting table can be imaged or the second position where the reading object other than the mounting table can be imaged. As long as the display according to the video signal from the image pickup means can be displayed on the monitor display section, and the display is between the first position and the second position, that is, the first position when the image pickup means is moving, for example. When it is positioned between the second position and the second position, the control means automatically controls the display corresponding to the video signal to be prohibited from being displayed on the display section. During the movement operation, the display of the unnecessary image on the display unit can be interrupted, and the uncomfortable unpleasantness due to the abnormal movement of the image can be prevented.

Embodiments Embodiments of the present invention will be described in detail and specifically below with reference to the drawings.

FIGS. 1, 2 and 3 show an example of an image reading apparatus to which the present invention can be applied. In FIG. 1 and FIG. 2, reference numeral 1 is an object to be read, for example, a document to be read, and 2
Is a mounting table on which the document 1 is mounted. Reference numeral 3 denotes a camera arranged above the mounting table 1 toward the mounting table 1. The camera 3 is rotatably supported by the horizontal support member 4 and can be rotated in the arrow direction. Here, the upper surface of the mounting table 1 is kept achromatic white or gray, but when it is white, the amount of light received by the photoelectric conversion unit (not shown) in the camera 3 is too large and the output is saturated. Since the white balance may not be adjusted properly, it is preferable to keep the gray color with a low reflectance. In addition, the surface is a diffuse reflection plate so that diffusely reflected light does not enter the camera 3.

Reference numeral 5 denotes a vertical support member that is integrated with the horizontal support member 4, and a monitor display unit 6 that outputs an image captured by the camera 3 is provided on the lower side of the vertical support member 5 facing the mounting table 1. It is mounted with an upward inclination, and the upper part is recessed to prevent light from the outside from entering the display unit 6 of the liquid crystal display television. That is, by arranging the monitor display unit 6 in such a manner, the monitor display unit 6 can be operated by the user who is directly facing the mounting table 2.
Also, the distances to the original 1 are kept substantially the same, which is easy for the user to see and convenient to use.

Reference numeral 7 is a switch for switching modes via a switch circuit described later, 8 is a switch for power supply,
Reference numeral 9 denotes a switch for adjusting the white balance of the camera 3. That is, by turning on the switch 9,
The white balance is automatically adjusted, but it is also possible to manually adjust the white balance depending on whether the type of diplomacy is fluorescent light, daylight, or incandescent lamp light. .

In FIG. 3, 10 is a knob for vertically moving or fixing the horizontal support member 4 together with the vertical support member 5,
The knob 10 can be fixed at a predetermined position by rotating the knob 10 and pressing the tip end of the knob 10 (not shown) to the vertical movement table 11 that holds the members 4 and 5 up and down. Reference numeral 12 is an external input terminal for inputting a video signal from the outside. The video signal input from the external input terminal 12 can be output to the monitor display unit 6 as described later, and the video signal can be output to the outside from the monitor output terminal 13. An illumination lamp 14 illuminates the monitor display unit 6.

Reference numeral 15 denotes a fixed base on which the mounting base 2 and the monitor display unit 6 are fixed, while the vertical movement base 11 is interposed between the fixed base 15 and the horizontal support member 4 and the vertical support member 5 so that the camera 3 moves vertically. Since it is slidably supported, by moving the camera 3 in the vertical direction via the vertical movement table 11, the range of the photographing area on the mounting table 2 can be changed.

The camera 3 is rotatable with respect to the horizontal support member 4 in the direction of the arrow in the vertical plane as shown in FIGS. 1 and 2, and is arranged at a position shown in FIG. 2, for example. An image on the blackboard 16 can be captured by rotating the camera 3 in that direction with respect to the blackboard 16 present.

FIG. 4 shows the configuration of a control circuit for carrying out the present invention. Here, 21 is a power plug, 22 is an AC adapter,
Since the DC power supply DC is supplied to each part including the camera 3 and the monitor display part 6 by the adapter 22, it is not necessary to individually provide a power supply. Reference numeral 23 denotes a synthesizer capable of synthesizing images. The synthesizer 23 synthesizes the external video signal input from the external input terminal 12 and the video output signal from the camera 3 by turning on the mode selector switch 7. By, for example, combining and outputting the same, and turning off the switch 7, it is possible to output only the video output signal from the camera 3.

24 is a distributor and 25 is a switch circuit.
Then, when the mode switch 7 is turned off, the external video signal input from the external input terminal 12 is cut off, and the distributor
Discontinue supply to 24. Further, in the distributor 24, when the mode changeover switch 7 is in the “ON” state and an external video signal is supplied from the external input terminal 12, the video signal is sent to the monitor display section 6 and the external monitor output terminal 13. Distribute.

Therefore, in this example, in the control circuit thus configured, the device 30 for lowering the level of the video signal is provided on the signal line 26 of the video output signal from the camera 3. In this example, as the video signal level lowering device, a breaking device constituted by a switch mechanism provided with two connection positions is used. That is, 31 is a rotary terminal piece that rotates around the center O in response to the rotational movement of the camera 3, and 32 is an arc-shaped fixed terminal piece that is arranged at the corresponding position.

Now, when the camera 3 is directed to the document 1 on the mounting table 2 as shown in FIG. 1 and the image is output as a video signal, the contact member 33 of the rotating terminal piece 31 is fixed to the fixed terminal piece 32. , For example, is connected to the first contact portion 32A. Further, when the camera 3 shifts from this state to the rotating operation, the rotating terminal piece 31 responds, so that the contact member 33 does not come into contact with the fixed terminal piece 32, that is, the fixed terminal piece 32 has a contactless position. First
It moves to the non-contact part 32C intermediate between the contact part 32A and the second contact part 32B, and the video output signal Video from the camera 3 is cut off during this period, that is, the level becomes zero.

Then, when the turning operation of the camera 3 is finished and the camera 3 is turned to the blackboard 16 as shown in FIG.
The contact member 33 is now fixed by the rotation of
The output signal Video from the camera 3 is supplied again to the monitor display unit 6 by being connected to the second contact portion 32B of the above. However, as described above, the video signal is output to the monitor display unit 6 while the camera 3 is rotating. Since it is not performed, it is possible to interrupt the image while the camera is moving, which is unnecessary and unsightly for the user.

Although the video output signal from the camera 3 is interrupted by the interruption device 30 in the above description, such an interruption device 30 is provided between the AC adapter 22 and the camera 3 instead. You can also do so. Alternatively, instead of using the cutoff device, for example, an attenuator is used to synchronize the moving operation of the camera 3 with a means for lowering the video output signal below a predetermined level so that the video output signal cannot be displayed on the monitor display unit 6 during the movement. May be.
Further, while the camera 3 is moving, instead of the video output signal from the camera 3, a video output for performing other display such as characters may be supplied to the monitor display unit 6. Furthermore, a timer switch may be provided so that the video output signal is aborted by the timer switch at the same time as the rotation. Even when the video output signal is displayed on the monitor display unit while the camera 3 is moving, for example, the front surface of the monitor display unit 6 is shielded by a liquid crystal shutter or the like while the camera 3 is moving. The present invention also includes a device in which an unsightly image is not displayed on the monitor display unit 6 while the camera is moving.

Furthermore, in the above-described example, the positions at which the camera 3 is rotated and stopped for imaging are two positions, that is, the position facing the mounting table 2 and the position facing sideways, but the application of the present invention is such a position. It is needless to say that the present invention is not limited to this, and can be applied to one having three or more stop positions for imaging.

Further, not only the rotation of the camera but also other movements such as vertical movement may be prevented from being displayed unsightly as in the present embodiment.

[Effects of the Invention] As described above, according to the present invention, a mounting table on which an object to be read can be mounted, and a movably supported by the mounting table, the object to be read is imaged to obtain a video signal. In an image reading device having an image pickup unit for outputting the image reading unit and a monitor display unit for outputting an image of the read item by the video signal, the image pickup unit is capable of picking up an image of the read item placed on the mounting table. When the reading object other than the position 1 or the mounting table is located at the second position where the read object can be imaged, it is possible to display on the monitor display unit according to the video signal output from the image pickup means, The imaging means is the first
When it is located between the position 2 and the second position, the monitor display unit is provided with a control unit that controls the display according to the video signal output from the image pickup unit to be prohibited. , Without displaying an unnecessary and unsightly image captured by the imaging means during the moving operation on the monitor display unit,
No discomfort to the user.

[Brief description of drawings]

1 is a perspective view showing an example of the configuration of an image reading apparatus to which the present invention can be applied, FIG. 2 is a perspective view showing a state in which the camera is rotated, and FIG. 3 is a side view of FIG. FIG. 4 is a block diagram of the control circuit of the image reading apparatus of the present invention. 1 ... Original, 2 ... Loading table, 3 ... Camera, 4 ... Horizontal support member, 5 ... Vertical support member, 6 ... Monitor display section, 7 ... Mode switch, 8 ... Power switch, 9 …… White balance adjustment switch, 10 …… Knob, 11 …… Vertical movement stand, 12 …… External input terminal, 13 …… External monitor output terminal, 15 …… Fixed stand, 16 …… Blackboard, 22 …… AC adapter, 23 …… combiner, 24 …… distributor, 25 …… switch circuit, 26 …… signal line, 30 …… video signal interruption device, 31 …… rotating terminal piece, 32 …… fixing terminal piece, 32A, 32B …… Contact part, 32C …… Non-contact part, 33 …… Contact member.

Claims (1)

[Claims] 1. A placing table on which an article to be read can be placed, an image pickup means movably supported by the placing table, which picks up the article to be read and outputs a video signal, and the reading by the video signal. An image reading apparatus having a monitor display unit for outputting an image of a property, wherein the imaging unit images the read property mounted on the mounting table at a first position or a property other than the mounting table. When positioned at the possible second position, it is possible to display on the monitor display unit according to the video signal output by the image pickup means, and the image pickup means makes the display at the first position and the second position. Image reading, characterized in that it is provided with control means for prohibiting display on the monitor display section according to the video signal output from the image pickup means when it is positioned between the position and the position. apparatus.