JP2000004315A - Original reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an original reader which reduces electrical energy that is consumed by a light source part. SOLUTION: This device consists of a light source part 3 which supplies light applied to original surface, a light source drive part 4 which drives a light source, a light source control part 5 that controls the light source part, an original edge detecting part 6 which detects the original edge of an original to be read, an original size detecting part 7 which detects the size of the original according to original edge information, an original size setting part 8 which inputs the size of the original to be read by an operator, a power supply part 9 which feeds power supply to the part 3 and a control part 10 which controls each of the above devices. Here, a part 5 reduces electrical energy that is consumed by the part 3 by controlling the part 4, so that power fed from the part 9 can be supplied only to a light source having effective read width, based on original size information inputted by the part 8 or original size information which is detected by the part 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed or detachable original reading apparatus applied to a facsimile apparatus, a copying machine, and the like, and more particularly to an original reading apparatus with reduced light source power consumption.

[0002]

2. Description of the Related Art Conventionally, an original reading apparatus applied to a facsimile apparatus, a copying machine, etc. reads an original by driving all light sources such as light emitting diodes provided in a light source section regardless of the size of the original to be read. Was. Therefore, light for reading information is also applied to portions other than the document surface, and extra data is read. This extra data has been erased by the masking process.

[0003]

However, in a document reading apparatus which reads information of a document by driving all the light sources, the light source which does not need to be driven is driven, and extra power consumption is required. become.

The present invention has been made in view of the above problems, and provides a document reading apparatus that controls a light source to be driven according to the size of a document to be read and reduces the amount of power consumed by the light source unit. The purpose is to:

[0005]

In order to achieve the above object, a document reading apparatus according to the present invention comprises a document table on which a document for reading information is placed, a light source for supplying light to the document surface, and a light source for driving the light source. A driving unit, a document size input unit for inputting a setting of the size of the read document from an operator, and a control unit for controlling each of the above units, wherein the control unit is configured to read the read document input from the document size input unit. On the basis of the document size information, the light source driving unit is controlled to drive only the light source that shines light on the reading width of the read document placed at a predetermined position on the document table.

A document reading apparatus according to the present invention includes a document table on which a document from which information is to be read is placed, a light source for supplying light to the document surface, light source driving means for driving the light source, and a reading device for detecting a reading width of the document to be read. A width detection unit; and a control unit for controlling each of the above units. The control unit controls the light source driving unit to light the reading width detected by the reading width detection unit of the read original placed at a predetermined position on the platen. The control is performed to drive only the light source that emits light.

A document reading apparatus according to the present invention includes a document table on which a document from which information is to be read is placed, a light source for supplying light to the document surface, light source driving means for driving the light source, and a reading device for detecting a reading width of the document to be read. Width detecting means, input means for inputting a setting of the size of the read document from the operator and setting for causing the reading width detecting means to detect the reading width of the read document, and control means for controlling each of the above means. When the setting of the size of the document to be read is input by the input unit, the control unit controls the light source driving unit to adjust the reading width of the read document placed at a predetermined position on the platen based on the input size setting. A control is performed to drive only the light source that emits light, and a setting for detecting the reading width of the read document is input from the input means to the reading width detecting means. If, to detect the reading width of the document reading to the reading width detection device is characterized by driving the only light source that shed light on the reading width of the reading document placed at a predetermined position on the platen to the light source drive means.

There is provided a power supply means for supplying power to the light source, and the light source driving means is controlled by the light source control means.
It is preferable to supply power only to the light source that shines light on the reading width of the read document.

The reading width detecting means may detect the reading width by detecting the document edge of the read document.

The control means includes: first control means for generating setting information of a light source to be driven among the light sources based on the document size information input from the document size input means;
And a second control unit for controlling the light source driving unit based on the setting information created by the control unit. The document reading apparatus includes a reading unit including a light source, a light source driving unit, and a second control unit. And a first control unit, a power supply unit, and an apparatus unit including a document size input unit,
The reading unit is preferably detachable from the device unit.

The control means includes first control means for generating setting information of a light source to be driven among light sources based on read width information of a read document detected by the read width detection means, and first control means. And a second control unit that controls the light source driving unit based on the setting information created by the first and second control units. The document reading apparatus includes a light source, a light source driving unit, a reading width detection unit, and a second control unit. It is preferable that the reading unit is composed of a reading unit, a first control unit, and a power supply unit, and the reading unit is detachable from the device unit.

The control means generates setting information of a light source to be driven among the light sources based on the document size information input from the document size input means or the reading width information of the read document detected by the reading width detecting means. First
And a second control unit for controlling the light source driving unit based on the setting information created by the first control unit. The document reading apparatus includes a light source, a light source driving unit,
A reading unit including a reading width detection unit and a second control unit; a device unit including a first control unit; a power supply unit; and a document size input unit. It should be removable.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a document reading apparatus according to an embodiment of the present invention. FIG.
2 shows a preferred embodiment of the document reading apparatus according to the present invention. FIG. 1 is a block diagram showing an embodiment of the document reading apparatus of the present invention, and FIG. 2 is a flowchart showing an operation example according to the embodiment shown in FIG.

The document reading apparatus shown in FIG. 1 includes a reading section 1 for reading a document, and a device section 2 for controlling the reading section and supplying power. The reading unit 1 includes a light source unit 3, a light source driving unit 4, a light source control unit 5, a document edge detecting unit 6, and the like.
Is composed of a document size detection unit 7, a document size setting unit 8, a power supply unit 9, a control unit 10, and the like.

The light source section 3 provided in the reading section 1 is constituted by a light emitting diode or the like, and irradiates a document placed on a document table (not shown) with light. The light source driving unit 4 supplies the power supplied from the power supply unit 9 only to the light source having the effective reading width set in the light source control unit. The light source control unit 5
The effective reading width information is received from the control unit 10, and the light source driving unit is controlled so that the power supplied from the power supply unit is supplied only to the light sources having the effective reading width. The document edge detector 6 detects a document end surface (edge) of a read document placed on a document table (not shown). A document size detection unit 7 provided in the apparatus unit 3 detects the size of the document based on the document edge information detected by the document edge detection unit 6. The document size setting section 8 is provided with a setting switch for inputting designation of the size of the document to be read by the operator. Examples of setting switches prepared in the document size setting unit 8 include B4, A4, B5, A5, and automatic setting. When the automatic setting switch is pressed by the operator, the document edge detecting unit 6 detects the document edge of the document placed on the document table under the control of the control unit.
This is a switch for automatically detecting the size of the document to be read. The power supply unit 9 supplies power to the light source unit and power to drive the entire apparatus. The control unit 10 calculates an effective reading width of the original based on the original size information detected by the original size detecting unit 7 or the original size information set by the original size setting unit, and outputs the calculated effective reading width information to a light source. Send it to the control unit.

A document reading apparatus according to the present invention is a document reading apparatus having a fixed or detachable reading section applied to a facsimile apparatus, a copying machine, etc., in which a light source having an effective reading width corresponding to the size of a document is driven. Power consumption.

In order to achieve this object, when the designation of the size of the original to be read is input from the original size setting unit, the control unit sets the light source to be actually driven based on the information set by the original size setting unit. The effective read width information, which is information, is output to the light source control unit. The light source control unit having received the effective reading width information controls the light source driving unit such that the power supplied from the power supply unit is supplied only to the light sources having the effective reading width. As a result, the amount of power consumed by the light source unit can be reduced.

When an automatic switch provided in the document size setting unit is pressed by an operator, the control unit 1
A value of 0 causes the document edge detector to detect the edge of the document. Document edge information detected by the document edge detector is sent to a document size detector, where the size of the document to be read is detected. The document size information detected by the document size detection unit is sent to the control unit, and the control unit outputs effective reading width information, which is setting information of the light source actually driven, to the light source control unit. The light source control unit is configured to control the light source driving unit based on the effective reading width information transmitted from the control unit such that power supplied from the power supply unit to the light source driving unit is supplied to the light source having the effective reading width by the light source driving unit. Control. As a result, the amount of power consumed by the light source unit can be reduced.

Next, a series of operations according to the above configuration will be described with reference to the flowchart shown in FIG. First, in step S1, whether the document size setting switch has been pressed is determined.
Determine whether or not. When the document size setting switch is pressed (step S1 / YES), it is determined whether or not the switch is an automatic switch (step S2). If the switch is an automatic switch, the control unit causes the document edge detection unit to detect the edge of the document (step S3).
The document edge information detected by the document edge detector is sent to the document size detector, where the size of the document is detected (step S4). The document size information detected by the document size detection unit is sent to the control unit, and the control unit calculates effective reading width information, which is setting information of the light source to be actually driven, based on the information, and calculates the calculated effective reading width information. The reading width information is transmitted to the light source control unit (Step S5). Then, the light source control unit controls the light source driving unit such that the power supplied from the power supply unit is supplied only to the light source having the effective reading width (step S6). As a result, the amount of power consumed by the light source unit can be reduced. Further, by providing an automatic switch in the document size setting unit, power consumption can be reduced without setting the document size consciously by the operator.

If the setting of the size of the original to be read is input instead of the automatic setting switch (step S2).
/ NO), the control unit calculates effective reading width information, which is setting information of the light source to be actually driven, based on the input document size information, and transmits the calculated effective reading width information to the light source control unit (step S5). ). Then, the light source control unit controls the light source driving unit so that the power supplied from the power supply unit is supplied only to the light sources having the effective reading width (Step S).
6). Thus, the amount of power consumed by the light source unit can be reduced.

[0021]

As is clear from the above description, in the original reading apparatus of the present invention, when the control means inputs the setting of the size of the original to be read by the input means, the light source drive is performed based on the input size setting. Means to control only the light source that shines light on the reading width of the read document placed at a predetermined position on the platen, and a setting that causes the reading width detecting means to detect the reading width of the read document from the input means. When input, the reading width detecting means detects the reading width of the read document, and the light source driving means drives only the light source that shines light on the reading width of the reading document placed at a predetermined position on the document table, The amount of power consumed by the light source can be reduced, and the power can be used effectively. Also, power consumption can be reduced without the operator consciously inputting the size setting of the read document.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a document reading apparatus according to the present invention.

FIG. 2 is a flowchart showing an operation example according to the embodiment shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reading unit 2 device unit 3 light source unit 4 light source driving unit 5 light source control unit 6 document edge detection unit 7 document size detection unit 8 document size setting unit 9 power supply unit 10 control unit

Claims (8)

[Claims] 1. A document table on which a document whose information is to be read is placed; a light source for supplying light to be applied to the document surface; a light source driving means for driving the light source; and a document size for inputting a setting of the size of the document to be read from an operator. Input means, and control means for controlling each of the above means, the control means, based on the document size information of the read document input from the document size input means, the light source drive means of the platen An original reading apparatus, which performs control to drive only a light source that shines light on a reading width of the original placed at a predetermined position. 2. A document table on which a document from which information is to be read is placed; a light source for supplying light to a document surface; light source driving means for driving the light source; reading width detecting means for detecting a reading width of a document to be read; Control means for controlling each of the above means, wherein the control means adjusts the reading width detected by the reading width detecting means of the read original placed at a predetermined position on the document table in the light source driving means. An original reading device, which controls to drive only a light source that emits light. 3. A document table on which a document from which information is to be read is placed; a light source for supplying light to the document surface; light source driving means for driving the light source; reading width detecting means for detecting a reading width of the document to be read; Input means for inputting setting of the size of the read document from an operator and setting for detecting the read width of the read document to the read width detecting means, and control means for controlling each of the above means The control means, when a setting of the size of the read document is input by the input means, based on the input size setting, the light source driving means is placed at a predetermined position of the platen A control is performed to drive only a light source that shines light on the reading width of the read document, and the input document is transmitted from the input unit to the reading width detection unit. When the setting for detecting the reading width is input, the reading width detecting means detects the reading width of the read document, and the light source driving means causes the reading document placed at a predetermined position on the document table. An original reading device that drives only a light source that emits light to the reading width of the original. 4. A power supply unit for supplying power to the light source, wherein the light source driving unit is controlled by the light source control unit.
4. The document reading apparatus according to claim 1, wherein power is supplied only to a light source that emits light to a reading width of the document to be read. 5. 5. The document reading apparatus according to claim 2, wherein the reading width detecting means detects the document width by detecting a document edge of the document to be read. 6. The first control means for generating setting information of a light source to be driven among the light sources based on the document size information input from the document size input means, and the first control means, A second control unit that controls the light source driving unit based on the setting information created by the control unit, wherein the document reading device includes the light source, the light source driving unit, and the second control unit. A reading unit comprising: a first control unit; a power supply unit; and a document size input unit. The reading unit is detachable from the device unit. The document reading device according to claim 1 or 4, wherein 7. The control unit according to claim 1, wherein the control unit generates setting information of a light source to be driven among the light sources based on read width information of the read document detected by the read width detection unit; A second control unit that controls the light source driving unit based on the setting information created by the first control unit, wherein the document reading device includes the light source, the light source driving unit, and the reading width. A reading unit including the detection unit and the second control unit; and a device unit including the first control unit and the power supply unit. The reading unit is detachable from the device unit. The document reading device according to claim 2, wherein the document reading device is provided. 8. A light source for driving one of the light sources based on document size information input from the document size input means or reading width information of the reading document detected by the reading width detecting means. A first control unit for creating the setting information of the first and the second control unit for controlling the light source driving unit based on the setting information created by the first control unit, the document reading device, A reading unit including the light source, the light source driving unit, the reading width detection unit, and the second control unit; the first control unit; the power supply unit; and the document size input unit. 5. The document reading device according to claim 3, wherein the reading unit is detachable from the device unit. 6.