JPH11234477A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an image reader that is able to start and set a driver means when a control button is pressed with no original on the image reader by starting the driver means on an external device and setting it when the control button is pressed with no original sensed. SOLUTION: A sheet feed scanner 31 is connected to a computer and carrying of an original is started by pressing a button 42 after inserting the original to a paper feed port 41 of the sheet feed scanner 31 and the original is read from the sheet feed scanner 31. If there is no original when the button 42 is pressed, a setting dialog to read an original such as a type of an image and a resolution is displayed on a display screen. Then a read driver is started and the setting menu is displayed on the read driver. Thus, in the case of absence of the original, the driver means is started by pressing the control button 42 and the driver means is set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image sensor which conveys a document and reads the image by an image sensor which converts the image into an electric image signal. The present invention relates to an image reading device capable of transferring an image to an external device.

[0002]

2. Description of the Related Art Conventionally, in an image reading apparatus of this type (sheet feed scanner) having a document conveying function, when a control button is pressed, an image is read if there is a document, and an image is read if there is no document. And the driver means was not started. Further, there is no means for immediately terminating the driver means when the control button is pressed by mistake.

[0003]

However, there is a problem that when the operator presses a control button of the image reading apparatus when there is no original in the above image reading apparatus, the driver means does not operate. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation. When a control button of an image reading device is pressed when there is no original in the image reading device, a driver is activated, and the driver is activated. It is an object of the present invention to provide an image reading apparatus capable of performing the above setting. Further, the present invention provides an image reading means capable of terminating the means for setting the driver means by pressing the control button again when the operator erroneously presses the control button of the image reading apparatus. It is an object.

[0005]

Therefore, in the present invention, the above object is achieved by providing an image reading apparatus having any one of the following constitutions (1) and (2). .

(1) An image sensor for converting an image read by conveying a document to an electric image signal, an A / D converter for converting the image signal to a digital signal, and an image signal converted to a digital signal And a control button for starting the conveyance of the document, and a sensor for detecting the presence or absence of the document, wherein the document is read when the control button is pressed. An image reading apparatus comprising: means for activating a driver means on the external device when no is detected, and for setting the driver means.

(2) Terminating the means capable of setting the driver means when the control button is pressed while the means capable of setting the driver means is activated. (1) The image reading apparatus according to the above (1), further comprising a unit capable of performing the following.

[0008]

According to the configuration of the present invention as described above, the operator activates the driver means by pressing the control button when there is no document to the image reading apparatus which starts conveying the document by pressing the control button. The setting of the driver can be performed. When the operator presses the control button by mistake, the control of the driver can be terminated by pressing the control button again.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
An embodiment will be described in detail with reference to the drawings.

[0010]

FIG. 1 is a diagram illustrating the internal structure of a document image reading apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a document image reading device for reading a document image. Reference numeral 1 denotes a contact-type image sensor (hereinafter also referred to as “CIS”), which includes a photodiode 2, a selfoc lens 3, an LED array 4, and a contact glass 5. The transport roller 6 is
It is arranged before and after CIS1, and is used to arrange an original. For the contact sheet 7, the original is CIS
Used to contact 1.

The document detection lever 8 is a lever for detecting that a document has been inserted. When the document detection lever 8 detects that a document has been inserted, the output of the document detection sensor 9 is generated by tilting the document detection lever 8. By changing the state, the state is transmitted to a CPU 215 which will be described later with reference to FIG. 2, so that it is determined that the original has been inserted, and a motor (not shown) for driving the original conveying roller 6 is driven. To start reading operation.

FIG. 2 is a block diagram showing the electrical configuration of the control circuit in the present embodiment. Hereinafter, referring to FIG.
The circuit operation will be described: In FIG. 2, reference numeral 201 denotes an image sensor (CIS1 in FIG. 1), and LEDs 202 of respective colors R, G, and B, which are light sources, are also integrated.
While the document is being conveyed over the contact glass 5
The ED control (drive) circuit 203 switches the LEDs 202 of each color R, G, B for each line to light up, so that a color image of R, G, B lines can be read sequentially.

An AMP 204 is an amplifier for amplifying the signal output from the CIS 201, and an A / D converter 205 performs A / D conversion on the amplified output to obtain, for example, an 8-bit digital output. Shading RA
M206 stores shading correction data by reading a calibration sheet in advance, and a shading correction circuit 207 performs shading correction of the read image signal based on the data of the shading RAM 206. The peak detection circuit 208 is a circuit that detects a peak value in the read image data line by line, and is used to detect the leading edge of a document.

A gamma conversion circuit 209 performs gamma conversion of image data read according to a gamma curve preset by a host computer.

The buffer RAM 210 is a RAM for temporarily storing image data in order to match the timing of an actual reading operation with the communication with the host computer. The packing / buffer RAM control circuit 211 is provided with a host computer. A more preset image output mode (binary, 4-bit multi-level, 8-bit multi-level, 2
After performing the packing process according to (4-bit multi-value),
A process of writing the data to the buffer RAM 210;
The interface circuit 212 reads and outputs image data from the buffer RAM 210.

The interface circuit 212 receives a control signal and outputs an image signal with an external device serving as a host device of the image reading apparatus according to the present embodiment, such as a personal computer.

Reference numeral 215 denotes, for example, a microcomputer-type CPU, which stores a processing procedure in the ROM 215A.
And a work RAM 215B, and controls each unit according to a procedure stored in the ROM 215A.

216 is a crystal oscillator, for example, and 214 is
This is a timing signal generation circuit that divides the output of the oscillator 216 according to the setting of the CPU 215 and generates various timing signals serving as operation references. 213 denotes an external device.

FIG. 3 shows a connection diagram with the computer apparatus of this embodiment: FIG. 3 shows a sheet feed (image) scanner 31 and a Macintosh having a Windows environment such as Microsoft Windows. And a computer device 32 such as an IBM PC or a PC compatible computer.

The computer device 32 has a display screen 33 such as a color monitor device, a keyboard 34 for inputting a command from a user, and a pointing device 3 for pointing an object displayed on the screen.
5 are provided.

FIG. 4 is an external view of a sheet feed (image) scanner according to the embodiment of the present invention.
The sheet feed scanner 31 is connected to the computer device 32, and the document is inserted into the paper feed port 41 of the foot feed scanner 31 shown in FIG.
Load an image from. If there is no original when the button 42 is pressed, a dialog for setting the original to be read, such as the type and resolution of an image, is displayed on the display screen 33 (FIG. 6).

FIG. 5 is a block diagram showing the configuration of software according to this embodiment. The scanning driver 51 in FIG. 5 is a reading driver. Low level driver 5
Reference numeral 2 denotes driver software for actually communicating with the sheet feed scanner 31. Watcher53
Is software that monitors the state of the sheet feed scanner 31, activates the reading driver 51, and causes the reading driver 51 to display a setting screen.

FIG. 6 shows an example of a dialog display diagram of a setting for reading a document such as an image type and resolution.

A method for controlling the operation of the embodiment of the present invention will be described with reference to the sequence flowchart of FIG.
In step S1, the Watcher 53 checks the state of the sheet feed scanner 31. If the button 42 (FIG. 4) of the sheet feed scanner 31 has been pressed in step S2, the process proceeds to step S3, and if not, the process returns to step S1.

If there is a document in the sheet feed scanner 31 in step S3, the process proceeds to step S4, and if there is no document, the process proceeds to step S5. In step S4, the document of the sheet feed scanner 31 is conveyed. In step S6, a setting screen of the reading driver 203 is displayed. In step S7, the state of the scanner 31 is confirmed. Step S8
If the button 42 of the sheet feed scanner 31 is depressed, the process proceeds to step S9; otherwise, the process proceeds to step S7.
Return to In step S9, the setting screen of the reading driver 203 is deleted, and in step S10, the reading driver ends.

(Other Embodiments) In the above-described embodiment, an example in which an image reading apparatus having a function of transporting a document is used as an image reading apparatus has been described. The present invention is effective even when an image reading apparatus to which a document feeding apparatus is connected is used.

[0028]

As described above, according to the present invention,
When there is no original in the image reading device, the driver unit is activated by pressing the control button of the image reading device, and the setting of the driver unit can be performed. When the unit for setting the driver unit is activated, By pressing the control button of the image reading apparatus, the driver unit can be terminated.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an internal structure of a document image reading apparatus according to an embodiment;

FIG. 2 is a block diagram showing the electrical configuration of a control circuit according to the embodiment;

FIG. 3 is a connection diagram with a computer of the embodiment.

FIG. 4 is an external view of a sheet feed scanner according to the embodiment.

FIG. 5 is a block diagram of a software configuration according to the embodiment;

FIG. 6 is an example of a dialog display diagram of settings for reading a document.

FIG. 7 is a flowchart of a control operation sequence according to the embodiment.

[Explanation of symbols]

 1,201 Image sensor (CIS) 2 Photodiode 3 Selfoc lens 4 LED array 5 Contact glass 6 Conveyance roller 7 Contact sheet 8 Document detection lever 9 Document detection sensor 10 Document image reading device 31 Sheet feed scanner 32 Computer device 41 Paper feed Mouth 42 button 202 LED 203 LED drive (control) circuit 213 External device 215 CPU

Claims (2)

[Claims] An image sensor for converting an image read by transporting a document to an electrical image signal, an A / D converter for converting the image signal into a digital signal, and an image sensor for converting the digitally converted image signal A document image reading apparatus having means for transferring the document to an external device, comprising: a control button for starting transport of the document; and a sensor for detecting the presence or absence of the document, and the document is pressed when the control button is pressed. An image reading apparatus comprising: means for activating a driver on the external device when the detection is not performed, and setting the driver. 2. When the control button is pressed while the means capable of setting the driver means is activated, the means capable of setting the driver means is terminated. 2. The image reading apparatus according to claim 1, further comprising a possible unit.