JPS62102662A - Picture reader - Google Patents

Abstract

PURPOSE:To obtain a normal image data and a mirror image data inexpensively and simply with respect to picture information by utilizing the forward and reverse movement of a picture read means so as to change over the read sequency of the picture information from an original to be read. CONSTITUTION:When a command signal is inputted by a controller 5 from a read start switch 11, an actuator 4 is drived and controlled based on the position detection signal of a picture read means 2 from a picture means position detection switch group 14 and the prescribed reciprocating movement is applied to the means 2. Then according to the command from a normal image/ mirror image selecting switch 7, a command is given to the means 2 to apply a shading correction and the reading of picture information W only at forwarding or reversing respectively. Further, a print command is given to a printer 8 to apply the normal image or mirror image print based on picture read data X outputted from the means 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for supplying display data to an external output display device such as a printer or CRT, which is a computer peripheral device, or as one of the internal components of a facsimile machine, for example. The present invention relates to an image reading device that has recently become popular, and more particularly to an image reading device that includes an image reading means that is controlled to move back and forth along a document table on which a document to be read is placed.

[Conventional technology]

As schematically shown in FIG. 6, the conventional image reading device having the above-mentioned basic configuration has a width approximately equal to the width of the document table 01 along which the original document O8 to be read is placed *2. To move an image reading means 02 (such as a CCD line sensor) having a width back and forth in the longitudinal direction of a document table 01, and to control the image reading means 02 to perform an image reading operation only during the forward movement. Accordingly, image information is obtained from the original to be read O3.

That is, the image reading means 02 sets the position corresponding to the starting edge of the shading correction plate 03 provided at one longitudinal end of the document table 01 as a home position OA, and first starts from this home position OA on the document table 01. The movement (forward movement) toward the terminal position OC corresponding to the other longitudinal edge and the image reading operation are started, and the shading correction plate 0 is moved in the middle of the movement.
Shading correction is performed until reaching the intermediate position OB corresponding to the terminal edge of No. 3, and while moving from the intermediate position OB to the terminal position OC, the image information drawn on the original to be read O3 is sequentially read, and the next Then, at the end position OC corresponding to the other longitudinal edge of the document table 01, the image reading operation is completed, the movement direction is reversed, and the document table 01 is moved (backward movement) toward the home position OA. This completes the reciprocating movement of the unit and the image reading operation, and prepares for the next image reading operation. Note that the image read data obtained by the image reading operation of the image reading means 02 is outputted to an external device in the same order in which it was read.

Therefore, according to the image reading apparatus having the image reading means 02 that performs reading and shaping during forward movement, the normal image data of the original to be read O5 (
For example, you will only get one copy (for example, a print copy).

By the way, recently, especially in the drawing creation field, it has become possible to obtain not only normal image data for restoring the image drawn on the original to be read O5, but also mirror image data of the image drawn on the original to be read O3. In response to the increasing demand for the image reading device, the above-mentioned conventional image reading device that reads and forms data during forward movement has been improved, and it is now possible to arbitrarily read either the normal image data or the mirror image data for the image drawn on the original document O8 to be read. An image reading device configured to be able to obtain images has been considered.

As shown in FIG. 7, image information 0- from the original OS to be read is obtained by the image reading means 02 of the forward movement reading molding, which is driven and controlled by the controller 05 via the actuator (for example, a forward/reverse motor) 04. One unit of image reading data Ox obtained by reading is stored in the line memory 06 in the same order as it was read, and the normal image/
When a normal image select signal (indicated by a solid line) is supplied from the mirror image select switch 07, the line memory 0
By outputting one unit of image reading data OX stored in 6 in the same order as it was read, the normal image data OY (shown by a solid line) for the original to be read OS is outputted, and furthermore, for example, the external output bag M08 such as a printer is output. Also, to obtain an orthogonal print OPy (shown by a solid line) through
When a mirror image select signal (indicated by a dotted line) is supplied from the normal image/mirror image select switch 07, one unit of read image data stored in the line memory 06 is output in the reverse order of the reading order. The original to be read O
The mirror image data OZ (indicated by the dotted line) for 8 and, in turn, the mirror image print OP2 (
The data output order from the line memory 05 can be switched by the controller 05 so as to obtain the data shown by the dotted line).

[Problem that the invention seeks to solve]

However, in the conventional image reading device shown in FIG. 7, the image information drawn on the original to be read O3 is
l! Normal image data OY and mirror image data O for o++
Although any of the above can be obtained arbitrarily, in order to configure such a configuration, a special line memory 06 or the like is required to temporarily store one unit of image reading data OX obtained by the image reading means 02. This has the disadvantage of complicating the structure and increasing costs.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a system that can be constructed at a very low cost and in a simple manner, and that can also be used to generate normal image data and mirror image data for image information drawn on a document to be read. It is an object of the present invention to provide an image reading device that can be obtained arbitrarily.

[Means for solving problems]

In order to achieve the above object, the present invention provides an image reading device having the basic configuration as described at the beginning, in which an external device reads only the image reading data during forward movement of the image reading means. The present invention is characterized in that it is configured to be able to switch between a state in which the image reading means is outputted to an external device, and a state in which only the image read data during the backward movement of the image reading means is outputted to an external device in the same order in which they are read. .

Further, as more specific means for realizing the above characteristic configuration, as will be better understood from the description of the embodiments to be described later, a state in which the image reading means performs the image reading operation only during forward movement, and a state in which the image reading means The image reading means is configured to be able to switch to a state in which it performs an image reading operation only during its return movement, and the image reading data obtained by the image reading operation of the image reading means is sent to an external device in the same order in which it is read. A system for controlling the timing of the image reading operation of the image reading means such as outputting the image, and a configuration in which the image reading means is configured to perform the image reading operation both during forward movement and backward movement; A state in which only the image read data obtained during the forward movement of the image reading means is read and output to an external device in the same order, and a state in which only the image read data obtained during the backward movement of the image read means are read and output in the same order. There are basically two methods that can be considered: a method of controlling the output timing of image read data by the image reading means, such as a method of controlling the output timing of the image read data by the image reading means, such as a structure that allows switching between outputting data to an external device in sequence.

[Effect]

The effects exhibited by the above characteristic configuration are as follows.

That is, in the image reading device according to the present invention, the first
As schematically shown in the figure, the order in which only the image reading data (this is read in the forward direction with respect to the original) from the original to be read S when the image reading means 2 moves forward is read. If the setting is switched to output to an external device, the normal image data Y is obtained as shown by the solid line in the figure, and the image reading data from the document S to be read when the image reading means 2 returns (this will be read in the opposite direction to the original as compared to the forward movement)
If the settings are changed to output the data to an external device in the same order in which it is read, mirror image data Z can be obtained as shown by the dotted line in the figure, but the normal image data Y
Both when obtaining the mirror image data information Z and when obtaining the mirror image data information Z, it is necessary to appropriately control the image reading operation timing and/or the read image data output timing of the image reading means 2 that is driven to move back and forth. As long as a slight modification is made to the control sequence, it is sufficient to output the image read data by the image reading means 2 to the external device in the same order in which it was read, so that the conventional image read data shown in FIG. It is no longer necessary to provide a special mechanism such as the line memory 05 that was required with the output order switching type, and as a result, the normal image data Y and mirror image data for 'II!, image information II!W drawn on the read document S. An image reading device that can arbitrarily obtain any of Z can be realized at a very low cost and with a simple configuration.

〔Example〕

Specific embodiments of the present invention are shown below in the drawings (Figures 2 to 5).
The explanation will be based on Figure).

FIG. 2 is a perspective view of the overall outline of an image reading device that employs the image reading timing control system according to the first embodiment of the present invention, and FIG. 3 shows an example of an external output device for the image reading device. A block circuit diagram showing the overall circuit configuration with a printer 8 connected is shown.

In FIG. 2, reference numeral 10 denotes an exterior casing of the main body, which is composed of a control section 10a and a mechanism section 10b.The upper operation panel section of the control section 10a has a reading device that is pressed when issuing a reading start command. Start switch 11. The normal image/mirror image select switch 7 does not need to be operated when trying to obtain normal image data, but is pressed only when trying to obtain mirror image data, and the external device (printer).
8. A print number setting switch 12 which is pressed to specify the number of prints. A liquid crystal display 13 for displaying the number of remaining prints is provided, and a transparent display plate on which the document S to be read is placed with the surface to be read facing downward is provided on the upper surface of the mechanism section 10b. A glass original table 1 is provided, and a contact type CCD (Charge Co., Ltd.
(Upled Device) An image reading means 2 equipped with a line sensor 2a is scanned along the document table 1 in the longitudinal direction of the document table 1 by an actuator 4 consisting of a forward/reverse motor and a timing belt reciprocating linear drive mechanism 9 interlocked with the actuator 4. It is configured to be driven in reciprocating motion. That is, the image reading means 2 first reads the document table 1.
From the home position A corresponding to the starting edge of the first shading correction plate 3a provided at one end edge in the longitudinal direction to the starting edge of the second shading correction plate 3C provided at the other end edge in the longitudinal direction of the document table 1. It moves forward to a terminal position C corresponding to the terminal edge, then reverses the moving direction at the terminal position C and moves backward to the home position A. And in the meantime,
If the normal image/mirror image select switch 7 is not pressed, it means that normal image data is to be obtained.
The image reading means 2 performs the shading correction using the first shading correction plate 3a and the reading operation of the image information W from the original document S to be read only during the forward movement thereof, and also performs the operation of reading the image information W from the original document S to be read. If the select switch 7 is pressed, mirror image data is to be obtained, so the image reading means 2 performs shading correction using the second shading correction plate 3C only during the return movement. , reads the image information W (see FIG. 3) from the document S to be read. Note that the reciprocating movement of the image reading means 2 and the image reading operation are performed according to the number of prints set by the print number setting switch 12. is repeated a number of times equal to . Note that the reading direction (main scanning direction l→) in the image reading means 2 itself is always constant.

Next, the operation of the image reading apparatus configured as described above will be described in more detail with reference to the block circuit diagram of FIG.

In this figure, 5 is a controller built into the control section 10a, and is configured with a CPU as its main part. The controller 5 receives a reading operation start command signal from the reading start switch 11, a normal image reading command signal (LOW level signal in this example) or a mirror image reading command signal (LOW level signal in this example) from the normal image/mirror image select switch 7. A high level signal), a print number command signal from the print number setting switch 12, and a switch group 14 such as a microsinch for detecting the position of the image reading means 2 (not shown in FIG. 2). The position detection signal etc. from the When a reading operation start command signal is input from the reading start switch 11, the controller 5 controls the actuator (forward/reverse motor) 4 based on the position detection signal of the image reading means 2 from the switch group 14. is driven and controlled to cause the image reading means 2 to perform a predetermined reciprocating movement, and during the reciprocating movement,
If a normal image reading command signal is input from the normal image/mirror image select switch 7, a forward movement reading command signal is issued to the image reading means 2, and the first shading correction plate 3a is activated only during the forward movement. If the image reading means 2 performs the shading correction used and the reading operation of the image information W from the original S to be read, and if the mirror image reading command signal is input from the normal image/mirror image selection scanner, the image reading means 2 Shading correction using the second shading correction plate 3c only during the backward movement by issuing a reading command signal during the backward movement;
It causes the image information W to be read from the original document S to be read to be read, and also issues a print command signal to the external device (printer) 8 to read the image information W output from the image reading means 2. Perform print operation. Note that this series of operations is repeated a number of times corresponding to the print number command signal from the print number setting switch 12.

By the way, in the image reading device according to the present invention,
The image read data X obtained by the image reading operation of the image reading means 2 is outputted to the external device (printer) 8 in the same order in which it was read. Therefore, the relationship between the reading order of the image information W from the document S to be read during the forward movement of the image reading means 2 and the reading order during the backward movement, which are originally opposite to each other, is output as is. As schematically shown in FIG. 3, when the reading operation is performed during the forward movement, the normal image data Y or the normal image print Pv is obtained, and when the reading operation is performed during the backward movement, the mirror image is obtained. Data Z or mirror image pudding) Pz
One image (one image) is obtained for each reciprocating movement of the image reading means 2.

In the above embodiment, a second shading correction plate 3C is provided at the other end (terminal end) in the longitudinal direction of the document table 1, and the shading is corrected each time the image reading means 2 starts moving forward and backward. Although the configuration is shown in which the correction is performed, if the configuration is such that the shading correction is always performed at the start of the forward movement of the image reading means 2, the second
The shading correction plate 3C can be omitted.

FIG. 4 is a block circuit diagram showing the overall circuit configuration in a state where a printer 8 as an example of an external output device is connected to an image reading device adopting the read data output timing control method according to the second embodiment of the present invention. ing.

That is, in the apparatus of the second embodiment, in order to obtain the normal image data Y or the normal image print PV, or the mirror image data Z or the mirror image print P2, as in the first embodiment, the image reading means 2 scans the image. Image information W from the read original S
Rather than adopting a configuration in which the timing of the reading operation is switched between the forward movement and the backward movement, the image reading means 2 is constantly given a reading command signal from the controller 5, and the image reading means 2 is constantly given a reading command signal to perform the backward movement even during the forward movement. Sometimes image information W from the original S to be read
The reading operation is performed, and instead, the timing of the image read data X obtained from the image reading means 2 is switched between the forward movement and the backward movement.

For this purpose, a gate element (an AND gate in this example) which requires a relatively simple configuration is installed after the image reading means 2.
15 is provided. In other words, the controller 5 controls the normal image/
If the normal image reading command signal is input from the mirror image select switch 7, a forward movement open command signal is issued to the gate element 15 to allow only the image reading data X during the forward movement of the image reading means 2 to pass; Further, if a mirror image reading command signal is input from the normal image/mirror image select switch 7, a backward movement open command signal is issued to the gate element 15, and image reading data X when the image reading means 2 moves backward. It only allows the light to pass through. As a result, as in the case of the first embodiment, for one reciprocating movement of the image reading means 2,
It is possible to arbitrarily obtain one (one sheet) of normal image data Y or normal image pudding) P or mirror image data Z or mirror image pudding) Pz. In this case, the document table 1
There is no need to provide the second shading correction provisional 3C at the other longitudinal end edge (terminus) of.

By the way, in each of the embodiments described above, the original to be read S
with the surface to be scanned facing downward! ! Although the configuration in which the image reading means 2 equipped with the contact type CCD line sensor 2a is provided on the lower side of the transparent glass original platen 1 placed twice is illustrated, the present invention is similar to that shown in FIG. An image reading means 2 equipped with a reduced CCD line sensor 2b is provided above a document S to be read, which is placed on a document table 1 (an opaque material may be used) with the surface to be read facing upward. Needless to say, it can also be applied to.

Furthermore, in each of the embodiments described above, there is provided a normal image/mirror image select switch 7 that does not need to be operated when attempting to obtain normal image data, but is pressed only when attempting to obtain mirror image data. However, a normal image select switch that is pressed when trying to obtain normal image data and a mirror image select switch that is pressed when trying to obtain mirror image data are provided separately. However, there is no problem.

〔Effect of the invention〕

As is clear from the detailed description above, according to the image reading device of the present invention, only the image reading data during the forward movement of the image reading means is outputted to the external device in the same order in which the image reading means is read, and By switching to a state in which only the image reading data during the backward movement of the image reading means is output to the external device in the same order in which it was read, that is, by using the forward movement and backward movement of the image reading means themselves, By switching the order in which image information is read from the original to be read, normal image data or mirror image data for the image information drawn on the original to be read can be obtained as desired. In order to appropriately control the image reading operation timing and/or the read image data output timing of the image reading means that is driven to reciprocate, without providing a special mechanism such as a line memory that is required with the order switching type, It is sufficient to make a slight modification to the control sequence of the controller that is originally provided, and even though it is a very inexpensive and simple configuration, it can be used to generate normal image data and mirror image data for the image information drawn on the original to be read. The excellent effect of being able to obtain any data at will has been achieved.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram (diagram corresponding to claims) for explaining the basic configuration and operation of an image reading device according to the present invention. 2 to 5 show various embodiments of the image reading device according to the present invention, FIG. 2 is an overall schematic external perspective view of the first embodiment, and FIG. 3 is a block circuit configuration diagram thereof. FIG. 4 is a block circuit configuration diagram of the second embodiment, and FIG. 5 is a sectional view of main parts according to another embodiment. 6 and 7 are for explaining the technical background of the present invention and problems in the prior art, and FIG. 6 shows the main parts for explaining the conventional general image reading device. and FIG. 7 shows a block circuit configuration diagram of an image reading device having a conventional configuration. S... Original to be read, 1... Original table, 2... Image reading means.

Claims (1)

[Scope of Claims] [1] An image reading device comprising an image reading means whose reciprocating movement is controlled along a document table on which a document to be read is placed, wherein when the image reading means moves forward, It is possible to switch between a state in which only the image read data is output to an external device in the same order in which it was read, and a state in which only the image read data during the return movement of the image reading means is output to the external device in the same order in which it was read. An image reading device comprising: [2] The image reading means is configured to be switchable between a state in which it performs an image reading operation only during its forward movement and a state in which it is caused to perform an image reading operation only in its backward movement, and the image reading means The image reading device according to claim 1, wherein the image reading device is configured to output the image read data obtained by the image reading operation of the reading means to an external device in the same order in which they were read. [3] The image reading means is configured to perform an image reading operation both during its forward movement and during its backward movement, and
A state in which only the image read data obtained during the forward movement of the image reading means is read and output to an external device in the same order, and a state in which only the image read data obtained during the backward movement of the image read means are read and output in the same order. The image reading device according to claim 1, wherein the image reading device is configured to be able to switch between outputting data to an external device in sequence.