JPH0623371U - Image input device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] In an image input device that has a handy scanner that can be attached to and detached from a main body that has a paper transport mechanism, conventionally, reading start and reading stop are performed by turning the sensor on and off Start and stop reading without sensor. [Structure] A main body 1 and a handy scanner 2 are included. The main body 1 is composed of a black roller 120 for carrying paper and also for black correction at the time of reading, a motor for carrying paper, and a reading switch. On the other hand, the handy scanner 2 is composed of a transparent member 23 for carrying paper and also transmitting light during reading, a CCD sensor 24 for detecting reflected light during reading, an optical system 4, and an image processing section 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an image input device, and more particularly to a fax machine having a handy scanner, an image scanner, a scanner printer, and the like.

[Prior art]

 Conventional drawings are shown in FIGS. 2 (A) and 2 (B). 2A is an overall configuration diagram, and FIG. 2B is a timing chart showing the timing at each part in FIG. The image input device comprises a main body 1 and a handy scanner 2 as shown in FIG.

The main body 1 is composed of a white roller 12 having a white surface for carrying paper and also performing white correction during reading, a sensor 13 for detecting paper when entering paper, a motor for carrying paper, and a reading switch. There is.

On the other hand, the handy scanner 2 includes a transparent member 23 that serves as a sheet transporter and also transmits light during reading, a CCD sensor 24 that detects reflected light during reading, and various optical systems 14 such as a reduction optical system. It is composed of a conventional image processing unit 31 for image-processing the output from the CCD sensor 24.

Next, the operation will be described with reference to FIGS. First, when no original or the like is inserted, the CCD sensor 24 reads the white level of the white roller opening, and the image processing unit 31 inserts the reference level for reading the original and the paper from the right side in the figure ( 1), the sensor 13 is turned on (2). When the sensor 13 is turned on, the motor drive is started after the stipulated time has passed, and after the stipulated step is sent, the motor is temporarily stopped. Next, when the reading switch is pressed by a human operation (3), the motor drive is started again, and after the specified step is sent, reading is started. The output from the CCD sensor 24 is subjected to known image processing in the image processing unit 31. When the end of the paper is separated from the sensor 13 (4), the reading is continued only during the specified step feeding, and at this time, the image processing unit 31 also stops the processing. The motor stops after the paper is ejected by sending the specified steps.

[0005]

[Problems to be solved by the device]

 In the above-described conventional structure, if the sensor 13 is not provided, the reading start and reading stop by the CCD sensor 24 or the start and stop of the processing by the image processing unit 31 cannot be performed, resulting in an increase in cost. Therefore, the present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide an image input device which can start and stop the reading process with a simple configuration.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, as a first idea, a plurality of conveying rollers for conveying an original, and one of the plurality of conveying rollers is black, and the original is sandwiched with the black roller. The transparent plate member shown, a reading sensor for reading the original through the transparent plate member, and the output within the effective range of the output of this sensor shows a color change from black to white, and this white output is maintained for a certain period of time. When this output is received, the processing is started by receiving the output, the output shows a color change from white to black, and when the black output is maintained for a certain period of time, the image processing unit that operates to end the processing described above. An image input device provided with. And, as a second invention, a plurality of conveying rollers for conveying a document, a black plate-shaped member arranged in a conveyance path of the document, and a black plate-shaped member that is in close contact with the document to be conveyed and together with the black plate-shaped member. A transparent plate member that sandwiches the document, a reading sensor that reads the document through the transparent plate member, and the output within the effective range of the output of this sensor shows a color change from black to white. Image processing that starts processing when it receives this output when it is sustained, shows a color change from white to black, and ends this processing when this black output is sustained for a certain period of time And an image input device including a unit.

[Action]

 With the above configuration, it is possible to provide an image input device that can start and stop the reading process without the paper detection sensor 13.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 (A) and 1 (B). FIG. 1A is a main configuration diagram, and FIG. 1B is a timing chart showing the timing at each part.

As shown in FIG. 1A, the main body 1 and the handy scanner 2 are included.

The main body 1 is composed of a black roller 120 having a black surface for carrying paper and also performing black correction during reading, a motor for carrying paper, and a reading switch.

On the other hand, the handy scanner 2 includes various types of optical systems such as a transparent member 23 for carrying paper and also transmitting light during reading, a CCD sensor 24 for detecting reflected light during reading, a reduction optical system, and the like. The image processing unit 3 processes the image data from the CCD sensor 24.

Next, the operation will be described with reference to the timing chart of FIG.

After the paper is inserted (1) and the reading switch is pushed by a human action (2), the motor drive is started after a lapse of a specified time, and the reading is started after the specified step is sent. Here, the initial value of the CCD sensor 24 is set in the image processing unit 3 by reading the black data of the black roller 120. When the top of the paper reaches the reading position, the data changes from black to white and the data read by the CCD sensor 24 is processed by the image processing unit 3. , After that, it becomes random data. On the other hand, if the data does not change even if it is sent for the specified time or longer, reading is stopped. In addition, the data changes from white to black when the end of the paper is in the reading position. If there is no change in the data even if it is sent for a specified time, the CCD sensor 24 stops reading, the specified step is sent and the paper is ejected, then the motor is stopped.

Therefore, the image processing unit 3 processes the image data from the time when the color changes from black to white to the time when the random data changes to black. FIG. 2 shows another embodiment of the present invention.

As shown in FIG. 2, it comprises a main body 1 and a handy scanner 2.

The main body 1 includes a black sheet 121 for performing black correction during reading, a paper carrying roller 122, a paper carrying motor, and a reading switch.

On the other hand, the handy scanner 2 is composed of a transparent member 23 for carrying paper and also for transmitting light at the time of reading, a CCD sensor 24 for detecting reflected light at the time of reading, an optical system 4 and an image processing unit 3. ing.

Next, the operation will be described. The operation timing is the same as in FIG.

After the paper is inserted (1) and the reading switch is pressed by a human action (2), the motor drive is started after a lapse of a specified time, and the reading is started after sending the specified steps.

Here, as the initial value of the CCD sensor 24, the black data of the black sheet 121 is read. When the top of the paper reaches the reading position, the data changes from black to white and then becomes random data. On the other hand, if the data does not change even if it is sent over the specified time, reading is stopped. In addition, the data changes from white to black when the end of the paper is in the reading position. If there is no change in the data even if it is sent for the specified time or more, scanning is stopped, the specified step is sent, the paper is ejected, and then the motor is stopped.

Therefore, the image data is processed from the time when the color changes from black to white to the time when the random data changes to black.

[0021]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. It is possible to provide a low-cost image input device that can start and stop reading without the paper detection sensor 13.

Further, since there is no relative displacement between the sensor 13 and the reading position, the reading error and waste are eliminated.

[Brief description of drawings]

FIG. 1A is a diagram of an image input device showing an embodiment of the present invention.

FIG. 1 (B) is a time chart diagram of the present invention.

FIG. 2A is a diagram of an image input device showing a conventional embodiment.

FIG. 2B is a conventional time chart diagram.

FIG. 3 is a diagram of an image input device showing another embodiment of the present invention.

[Explanation of symbols]

 1 Main Body 2 Handy Scanner 3 Image Processing Unit 4 Optical System 12 White Roller 13 Sensor 23 Transparent Member (Transparent Plate Member) 24 CCD Sensor (Reading Sensor) 120 Black Roller (Black Conveying Roller) 121 Black Sheet 122 Roller (Conveying Roller)

Claims (2)

[Scope of utility model registration request] 1. A plurality of carrying rollers for carrying a document, one of the plurality of carrying rollers is black, and a transparent plate member for sandwiching the document with the black roller and a transparent plate member The reading sensor that reads the document and the output within the effective range of the output of this sensor show a color change from black to white, and when this white output is maintained for a certain time, this output is received and processing is started. An image input device comprising: an image processing unit that operates to terminate the process when the output shows a color change from white to black and the black output is maintained for a certain time. 2. A plurality of transport rollers for transporting a document, a black plate-shaped member arranged in a transport path for the document, and a document that is in close contact with the document to be transported and sandwiches the document together with the black plate-shaped member. A transparent plate member, a reading sensor for reading the original through the transparent plate member, and an output within the effective range of the output of this sensor shows a color change from black to white, and when the white output is maintained for a certain period of time. And receiving the output to start processing, the output showing a color change from white to black, and an image processing unit that operates to end the processing when the black output is maintained for a certain time. Image input device.