JPH02215265A - Original reader - Google Patents

Abstract

PURPOSE:To read only one part of an original by providing a range designating means, and a means to control the scanning of a photoelectric converting means. CONSTITUTION:The left lower point of a read hoped range is matched to the origin of an original reading part 50. By pushing keys 332 and 331, main and sub scanning ranges are designated, they are inputted from a range designation input part 4 to a control part 3, and the scanning range is set to a sensor drive control part 2. A sensor part 1 in the lower part of a scanner 31 reads the contents of the set range of the original, they are made into two-dimensional information by a control part 2, the information is binarized and encoded by an image processing part 5, the information is modulated by a transmission processing part 6, and it is sent on a line 7. By such constitution, a user sets the main and sub scanning of the sensor part 1 in an arbitrary range, the range is scanned by the sensor 1, and thereby, one part of the original is read.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a document reading device installed in a facsimile machine or the like.

(Prior Art) Conventionally, for example, a document reading device installed in a facsimile machine performs sub-scanning by feeding the document one sheet at a time, and the main scanning direction always covers the entire width of the document. It will be done. For this reason, it has been impossible to read only a portion of the document and transmit only the read portion.

(Problems to be Solved by the Invention) As mentioned above, the original document reading device installed in the conventional facsimile machine etc. could not read only one part of the document. Therefore, even though only a portion of one manuscript is required, the entire text must be transmitted, which is uneconomical. SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks and provides a document reading device that can read a portion of a document.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a document reading device that scans a document with a charge conversion means and reads the document content as an electrical signal.
The photoelectric converter has a configuration comprising a range specifying means for specifying a scanning range of the photoelectric converting means, and a control means for electrically or mechanically controlling the photoelectric converting means so that the photoelectric converting means scans the range specified by the range specifying means. are doing.

(Function) In the document reading device of the present invention, the range specifying means specifies the scanning range of the photoelectric conversion means to the control means. The control means are
The photoelectric conversion means is electrically or mechanically controlled to scan a designated range.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the document reading device of the present invention. Reference numeral 1 denotes a close-contact one-dimensional sensor unit that photoelectrically converts the contents of a document, and 2 controls the main and sub-scanning of this sensor unit, and creates image data from the input photoelectric conversion signal and sends it to the image processing unit 5. Sensor drive control unit that outputs, 3
4 is a control unit that performs individual control such as specifying the document reading range and control of the entire device, 4 is a range command input unit that performs key manual input to specify the document reading range, and 5 is a binarization process and code for input image data. The image processing unit 6 is a transmission processing unit that modulates the image data output from the image processing unit 5 and sends the modulated image data onto the line 7. Note that the portion indicated by 50 in the figure constitutes the document reading device, and the remaining portions indicate a portion of the facsimile device.

FIG. 2 is a diagram showing a detailed example of the line sensor portion shown in FIG. 1. 8 is a document; 21 is a one-dimensional image sensor; 22 is a SELFOC lens array that forms image information on the image sensor 21; and 23 is a light source that illuminates the document 8. One-dimensional image information of the original 8 is imaged on the image sensor 21 by the SELFOC lens array 22 at a ratio of 1:1.

FIG. 3 is a diagram showing an example of a scanning mechanism portion of the document reading section 50 shown in FIG. 1. Reference numeral 31 denotes a scanner section with the close-contact type line sensor section shown in FIG. 2 attached to its lower part, 32 a scanning guide for supporting movement of the scanner section 31, and 33 an overview of the range specification input section 4 shown in FIG. In the example, key 331 specifies the main scanning range and key 33 specifies the sub-scanning range.
A plurality of 2 are provided respectively. Note that scanning guide 3
2, there is an optical, magnetic, or electrical marker 341 in the figure that scans the one-dimensional sensor part with uniform linear density in the sub-scanning direction.
The marker is attached to the portion shown by , and this marker is detected by the one-dimensional sensor section 1 and outputted as a timing signal in the main scanning direction to the sensor drive control section 2 shown in FIG.

Next, the operation of this embodiment will be explained. First, the operator aligns the lower left end of the range to be read in the document with the origin O shown in FIG. 3 of the document reading section 50. Thereafter, the key 331 located at the right end of the reading range is pressed to designate the main scanning range, and the key 332 located at the upper end of the reading range is pressed to designate the sub-scanning range. Pressing signals of these keys 331 and 332 are input to the control section 3 from the range designation input section 4 shown in FIG.

The control section 3 determines the scanning range from the input key press signal, sets it in the sensor drive control section 2, and activates the sensor drive control section 2. Thereby, the sensor drive control section 2 starts scanning control of the sensor section 1, but at this time, the main scanning and sub-scanning ranges are set to the above-mentioned set ranges. To explain this scanning operation with reference to FIG. 3, the main scanning of the sensor section 1 attached to the lower part of the scanner section 31 is electrically performed in the direction of arrow A, and the scanner section 31 moves along the scanning guide 32 in the direction of arrow A. By moving the sensor section, the sub-scanning of the sensor section is performed. In this way, the sensor section 1 reads the contents of the set range of the document 8 as image information, which is formed into two-dimensional image data by the sensor drive control section 2 and then output to the image processing section 5. The image processing unit 5 binarizes and encodes the input image data,
This is output to the transmission processing section 6. The transmission processing section 6 modulates the input data and sends it onto the line 7. As a result, only the contents of one portion of the original document 8 will be transmitted to the other party. It is assumed that operations such as making a call to the other party and closing the line in the above-mentioned operations are performed in a well-known manner. According to this embodiment, the main scanning range and sub-scanning range of the sensor unit 1 can be set to any desired range by the user, and furthermore, since the sensor unit 1 scans this set range, one part of the document
You can read parts. Therefore, by facsimile, etc., it is possible to communicate only a portion of the document, reducing line occupation time and lowering communication costs. Note that if the document reading device of the present invention is used in a copying device, only a portion of the document can be copied.

[Effects of the Invention] As described above, according to the document reading device of the present invention, a portion of a document can be read.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the document reading device of the present invention, FIG. 2 is a diagram showing a detailed example of the sensor section shown in FIG. 1, and FIG. 3 is a block diagram showing an example of the sensor section shown in FIG. 1. FIG. 3 is a diagram showing an example of a scanning mechanism portion of the device. 1...Sensor section 2...Sensor drive control section 3.
...Control section 4...Range specification input section 5...Image processing section 6...Transmission processing section 7...Line
31...Scanner part 331, 332...Key agent Patent attorney Book 1) Takashi third factor

Claims (1)

[Claims] A document reading device that scans a photoelectric conversion means on a document and reads the contents of the document as an electrical signal includes a range designation device that designates a scanning range of the photoelectric conversion device, and a range designated by the range designation device that is scanned by the photoelectric conversion device. 1. A document reading device comprising: control means for electrically or mechanically controlling the conversion means to scan.