JPS6236984A - Picture reader - Google Patents

Abstract

PURPOSE:To obtain a picture reader with good operability not requiring interconnections in use by supporting incorporatedly an original platen, a photoelectric transducer section converting a picture on the original platen into an electric signal and a monitor display section. CONSTITUTION:The original platen 1, a camera 2 and the monitor display section 5 are fixed incorporatedly by a horizontal support section 3 and a vertical support section 4. Thus, the region picked up by the camera 2 on the original platen 1 is made variable by sliding the horizontal support section 3 to change the position of the camera 2 in the X direction. Further, the size of the region picked up by the camera 2 is changed on the original platen 1 by sliding the vertical support section 4 to change the position of the camera 2 in the Z direction. Moreover, the interconnections among the sections are not required so as to attain ease of the operation.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an image reading device.

<Prior Art> Conventional image reading devices have been used, for example, as devices for compositing handwritten caption cards onto a video screen. In such a conventional image reading device, a mounting table on which an image to be read is placed and a camera having a photoelectric conversion unit for reading the image are formed separately. Furthermore, a monitor display section for displaying images converted into electrical signals by the photoelectric conversion section was also connected to a separate television device.

<Problems to be Solved by the Invention> As mentioned above, in the conventional image reading device, the mounting table, the photoelectric conversion section, and the monitor display section are separate parts. The drawback was that it had to be connected before use.

Means for Solving the Problems> In view of the above-mentioned conventional drawbacks, the present invention provides a mounting table, a photoelectric conversion unit that converts an image on the mounting table into an electrical signal, and a monitor display based on the electrical signal. and a support member that supports the monitor display section.

Function: The mounting table, the photoelectric conversion section that converts the image on the mounting table into an electrical signal, and the monitor display section are integrally supported.

<Embodiment> FIGS. 1 and 2 are a perspective view and a sectional view, respectively, of an image reading device according to an embodiment of the present invention.

In FIGS. 1 and 2, l is a mounting table on which an image 1' to be read is placed. In order to adjust the white balance of the camera 2, which has a photoelectric conversion section for reading an image of a document or the like, which will be described later, the surface of the mounting table l facing the camera 2 is achromatic gray. Also, the surface of the mounting table 1 on the camera 2 side may be white, but if the amount of light that enters the photoelectric conversion unit in the camera 2 is too large, the output of the photoelectric conversion unit will become saturated, making it impossible to properly adjust white/lance. In order to prevent this, gray, which has a lower reflectance, is preferable to white. Further, the mounting table l is made of a diffuse reflection plate so that diffusely reflected light does not enter the camera 2 from the mounting table l. Reference numeral 2 denotes a camera fixedly supported by a horizontal support section 3, which will be described later, and has a color photoelectric conversion section. Reference numeral 3 denotes the horizontal support section, which is slidable in the X direction shown in the figure, and can move the area photographed by the camera 2. Reference numeral 4 denotes a vertical support part, which is fixed to the horizontal support part 3 and is slidable in the Z direction shown in the figure. Such a configuration will be described later with reference to FIG. A monitor display section 5, a switch for switching a switch circuit 6 to be described later, and a power switch 7 are provided on the side of the mounting table l at the bottom of the vertical support part 4. Also, a power switch 7 for switching a switch circuit 6, which will be described later, is provided. The monitor display section 5 is provided with an inclination at the bottom of the vertical support section 4.
The monitor display section 5 is arranged at the same distance from the user as the mounting table l. Furthermore, the monitor display section 5 using a liquid crystal television should be designed so that the luminous flux from a lamp 8, which will be described later, does not enter and make it difficult to see. It is provided at a position recessed in the vertical support 4 by a distance of t, 5d and is further inclined as described above. Reference numeral 8 denotes the lamp, which illuminates the mounting table 1 through the diffuser plate 9 by irradiating the entire mounting table 1. Furthermore, according to this embodiment, the lamp 8 illuminates the mounting table 1 obliquely from above, thereby preventing the light beam from the lamp 8 from being reflected by the mounting table 11 and directly entering the camera 2. ing. IO is a switch member for white balance adjustment of the camera 2, and by turning on the switch member, the white balance can be automatically adjusted. Alternatively, white balance adjustment may be manually selected depending on the type of external light, for example, fluorescent light, medium light, or incandescent lamp light by turning on the switch member IO. 11 is a fixing knob for sliding and fixing the vertical support part 4.

Reference numeral 12 denotes an external input terminal for inputting a video signal from the outside, and the external input input from the input terminal is output from the monitor display section 5 and the monitor output terminal 13. Reference numeral 14 denotes an illumination lamp for illuminating the monitor display section 5. Reference numeral 15 denotes a slide table which will be described later, 16 a vertically movable table, and 17 a fixed table for fixing the mounting table l.

According to this embodiment, the mounting table 1, the camera 2, and the monitor 5 are integrally fixed by the horizontal support part 3 and the vertical support part 4.

Next, the mechanisms of the horizontal support section 3 and the vertical support section 4 will be explained in detail using FIG.

In FIG. 3, reference numeral 15 denotes the slide table that slides in the X direction, and the slide table 15 has a dowel 15a.

15b is provided. The slide stand 15 also serves as a heat sink for the camera 2. 16 is the dowel 15a, 1
5b fits into the guide groove 16a.

16b, and has dowels 16c and 16d for sliding in the Z direction. Reference numeral 17 denotes the fixed base fixed to the mounting base 1, and the dowel 16c
, 16d are fitted into the guide grooves 17c and 17d, and further provided with a receiving hole 17e into which the fixed knob 11 is inserted, and a hollow 17f into which the switch 7 is fitted.

In the above explanation, only the dowels and guide grooves provided in the position visible from the front in Figure 3 are explained.
Similar dowels and guide grooves are also provided on the back side of the figure.

In the above-described embodiment, the slide table 15 is a vertically movable table 16.
The vertically movable table 16 is slidable in the X direction relative to the fixed table 17, and furthermore, the vertically movable table 16 is slidable in the Y direction relative to the fixed table 17. In addition, in order to securely fix the vertically movable base 16 to the fixed base 17, the fixed knob 11 is rotated, and the tip of the knob 11 is brought into pressure contact with the I-lower movable base 16, thereby fixing the vertically movable base 16. That's what I do.

Therefore, according to this embodiment, the area photographed by the camera l on the mounting table 11- can be made variable by sliding the horizontal support part 3 and changing the position of the camera l in the X direction.

Furthermore, by sliding the eastward supporting portion 4 and changing the position of the camera 1 in the two directions, it is possible to change the size of the area that can be photographed by the camera 2 on the mounting table 11-.

Next, the electrical circuit of the image reading device described above will be described in detail with reference to FIG.

FIG. 4 is a diagram showing an example of the configuration of an electric circuit block of the image reading device shown in FIG. 1. In FIG. 4, the same reference numerals as in FIGS. 1 to 3 indicate the same elements.

21 is a power plug, 22 is an AC adapter as a power source, and 23 is a synthesizer, which synthesizes the video output of the camera 2 and the external video output, for example, at l:1 when the mode selector switch 25 is ON, as will be described later. , mode selector switch 25
This circuit outputs only the video output of camera 2 when is OFF.

24 is a distributor, and as described later, a switch circuit 6
This is a circuit for distributing the video signal from the monitor to the internal monitor display section 5 and the external monitor output terminal 13.

In the embodiment of the present invention, a camera 2, an internal monitor display section 5,
Another feature is that the switch circuit 6, lamp 8, and combiner 23 are powered by a common AC adapter 22.

As a result, camera 2, internal monitor 5, lamp 8. There is no need to provide a power source for each of the switch circuit 6 and the combiner 23, which has the effect of simplifying the configuration.

Next, FIG. 5 is a diagram showing an example of the configuration of the switch circuit 6. As shown in FIG.

In the figure, R1 is a resistor installed between capacitor C1 and ground, C1 is a coupling capacitor, R2 and R3 are bias setting resistors, Ql and Q2 are buffer transistors, and R
4, R5 is the transistor Q1. The resistor S W + connected to the emitter of Q2 is a contact that is switched by a changeover switch. In this embodiment, as described above, the power level DC of the switch circuit 6 is obtained from the AC adapter 22 as a common power source for the image reading apparatus.

Next, FIG. 6 is a diagram showing an example of the configuration of the synthesizer 23, in which the RI
1 and RI2 are resistors, and 26 is an operational amplifier. When the mode changeover switch 25 is turned on, the output eo of the operational amplifier 26 is (where 1 is a signal from the camera 2, and v2 is a signal from an external input).

Further, when the mode changeover switch 25 is OFF, the output eo of the operational amplifier 26 is as follows. Further, the DC power supply for the operational amplifier 26 is obtained from the AC adapter 22 as a common power supply.

Next, FIG. 7 is a diagram showing an example of the configuration of the distributor 24, R6 is a resistor provided between the capacitor 2 and the ground, C2 is a coupling capacitor, R7 and R8 are bias resistors, Q3. Q
4 is a buffer river transistor, R9, RIG is a transistor Q3. This is a resistor connected to the emitter of Q4.

With this configuration, the video signal from the switch circuit 6 is sent to the internal monitor 5 and the external monitor output terminal 13.
distributed to.

Transistor Q3 in the figure. The power level DC to which the collector of Q4 is connected is also obtained from the AC adapter 22 as a common power source.

As described above, according to this embodiment, the mounting table 1, the camera 2, and the monitor display section 5 are integrally supported, and the camera 2 and the monitor display section 5 have a common power source. It is possible to provide an image reading device with very good operability, which does not require connection between the two devices.

<Effects of the Invention> As explained above, according to the present invention, a mounting table for an image to be read, a support member connected to the mounting table, a photoelectric conversion section for converting the image into an electrical signal, and Since it supports a monitor display section that performs multi-monitor display based on electrical signals, it can be used like a conventional image reading device in which the photoelectric conversion section, part of the monitor, and the mounting table are formed separately. This has the effect of saving the trouble of having to connect each one when doing so.

[Brief explanation of drawings]

1 and 2 are a perspective view and a sectional view, respectively, of an image reading device according to an embodiment of the present invention, and FIG. 3 is a horizontal support portion 3. FIG. 4 is an exploded perspective view of the mechanism of the vertical support section 4. FIG. 4 is an electric circuit block diagram of the image reading device shown in FIG. 5 is a circuit diagram of the switch circuit 6 shown in FIG. 4, FIG. 6 is a circuit diagram of the combiner 23 shown in FIG. 4, and FIG. 7 is a circuit diagram of the distributor 24 shown in FIG. 4. It is. 1-----1 mounting table 2-----1 camera 5-----monitor display section 6-----switch circuit 8----m-lamp

Claims (1)

[Scope of Claims] A mounting table for an image to be read; a supporting member connected to the mounting table; and a photoelectric conversion unit supported by the supporting member and converting the image on the mounting table into an electrical signal. and a monitor display section supported by the support member and performing monitor display based on the electric signal.