JPH11331450A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use one external switch not only as the sign of original read but also as the sign for executing other functions by detecting the number of times of pressing the switch within fixed time. SOLUTION: External switch information is inputted to a CPU 215 as start/ stop signals. Also, the CPU 215 detects how many times the start/stop signals are inputted within the fixed time. That is, an original is read in the case that a start/stop switch is pressed once, white shading is performed in the case that the start/stop switch is pressed twice and black shading is performed in the case that the start/stop switch is pressed for three times. Thus, in the case of starting the plural function by the external switch, though the plural external switches are required conventionally, the plural functions of this image reader are executed by one external switch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image reading apparatus capable of reading an original image with an electric analog image signal and transferring the digitally converted image signal to an external device.

[0002]

2. Description of the Related Art Conventionally, in this type of document image reading apparatus, an external switch provided on the image reading apparatus has been used to signal the start of image reading.

[0003]

However, such an external switch has been used only as a signal for reading the original. Therefore, when the functions of a plurality of image reading apparatuses are started by respective external switches, there is a problem that a plurality of such external switches are required.

The present invention has been made in view of the above-described aspects, and it is possible to use one external switch not only as a signal for starting document reading but also as a signal for executing another function. It is an object to provide a possible image reading device.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention aims to achieve the above object by providing an image reading apparatus according to any one of the following items (1) to (4).

(1) An image sensor that converts a read document image into an electric image signal, an A / D converter that converts the image signal into a digital signal, and an external device that converts the digitally converted image signal into an external device And a switch for starting reading of the document, wherein the number of times the switch is pressed within a predetermined time is detected.

(2) The image reading apparatus according to (1), wherein the function of the document image reading apparatus is changed according to the number of times the switch is pressed, and the reading of the document is executed.

(3) An image sensor for converting a read document image into an electric image signal, an A / D converter for converting the image signal into a digital signal, and an external device for converting the digitally converted image signal into an external device In a document image reading apparatus II having means for transferring a document and a switch for starting reading of a document, if the switch is pressed a plurality of times, the second and second switches after the first switch is pressed Measuring the time from when the switch is pressed to the time when the switch is pressed a plurality of times sequentially, such as the third time, and changes the function of the document reading apparatus according to the time to execute the reading of the document. An image reading apparatus characterized by the above-mentioned.

(4) The function of the document image reading apparatus is changed according to the number of times the switch is pressed and the time between when the switch is pressed a plurality of times, and the document is read. The image reading device according to any one of the above items (1) to (3).

[0010]

According to the present invention as described above, the function of the image reading apparatus can be started by the number of times the external switch is pressed within a certain period of time. Conventionally, a plurality of functions are started by the external switch. In such a case, a plurality of external switches are required, but a plurality of functions of the image reading apparatus can be executed by one external switch.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on a plurality of examples with reference to the drawings.

[0012]

(Embodiment 1) FIG. 1 shows an internal configuration diagram of a document image reading apparatus according to a first 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, referred to as “CIS”), which includes a photodiode 2, a self-fox 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 a document. The contact sheet 7 is a CIS1
Used to contact with.

The document detection lever 8 is a lever for detecting that a document has been inserted. When the document detection lever 8 detects that the 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 the original conveyance. And perform a reading operation.

FIG. 2 is a block diagram showing the electrical configuration of the control circuit according to the first embodiment. Hereinafter, the circuit operation of this embodiment will be described with reference to FIG.
Reference numeral 01 denotes a CIS (image sensor), in which LEDs 202 of three colors R, G, and B, which are light sources, are also integrated. The control circuit 203 switches the LEDs 202 of each color for each line to light up, so that a color image of R, G, and B lines can be sequentially read.

AMP 204 is an amplifier for amplifying the signal output from CIS 201, and 205 is
This is an A / D converter that performs A / D conversion of the amplified output to obtain, for example, an 8-bit digital output.

The shading RAM 206 stores data for shading correction by reading a calibration sheet in advance, and the shading correction circuit 207 stores the shading correction data in the shading RAM 2.
The shading correction of the read image signal is performed based on the data 06.

The peak detecting circuit 208 is a circuit for detecting a peak value in the read image data for each line, and is used for detecting a leading edge of a document.

The gamma conversion circuit 209 converts gamma 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. More preset image output modes (binary, 4-bit multi-level, 8-bit multi-level,
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 to and from an external device 213 such as a personal computer which is a host device of the document image reading apparatus according to the present embodiment.

Reference numeral 215 denotes a CPU in the form of, for example, a microcomputer, 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. Information of the external switch is sent to the CPU 21 as a start / stop signal.
5 is input. Further, the CPU 215 detects how many times the start / stop signal has been input within a predetermined time.

Reference numeral 216 denotes a crystal oscillator (OSC),
Reference numeral 214 denotes a timing signal generation circuit that divides the output of the transmitter 216 according to the setting of the CPU 215 and generates various timing signals serving as operation references.

Next, the operation sequence of the first embodiment will be described with reference to the flowchart of FIG. 3. First, after power is turned on in step S1, the original image reading apparatus 10
In step S2, initialization is performed, preparation for image reading is completed, and the process waits until a start / stop switch is pressed.

In step S3, the number of times the start / stop switch has been pressed is counted. start/
If the stop switch value is pressed once, step S
The process proceeds to step S4, where the original is read.

If the start / stop switch has been pressed twice, the flow advances to step S5 to perform white shading.

If the start / stop switch has been pressed three times, the flow advances to step S6 to perform black shading.

When each of steps S4, S5, and S6 is completed, the process returns to step S3, and waits until the start / stop switch is pressed again.

(Embodiment 2) As another embodiment, in addition to the one in which the function of the document image reading apparatus 10 is changed and executed by the number of times the start / stop switch is pressed as in the first embodiment, In the second embodiment, the interval time when the start / stop switch is pressed is measured, and the function of the image reading apparatus is changed depending on the measured time.

FIG. 4 is a flowchart of the processing operation sequence of the second embodiment.
The book document image reading apparatus 10 shown in FIG.
Is performed to complete preparation for image reading, and waits for a start / stop switch to be pressed.

In step 13, the number of times the cart / stop switch has been pressed is counted. If the start / stop switch has been turned once, the process proceeds to step S14, in which case the document is read.

If the start / stop switch has been pressed twice, the process proceeds to step S15, and the interval time during which the start / stop switch is pressed is measured. If the time is less than 30 ms, the process proceeds to step S16, where white shading is performed. On the other hand, if it is longer than 30 ms, the process proceeds to step S17, where black shading is performed.

When each of steps S14, S16 and S17 is completed, the process returns to step S13 to wait for the start / stop switch to be pressed.

As described above, even if the number of times the start / stop switch is pressed is small, it is possible to execute more functions of the document image reading apparatus.

[0035]

As described above, according to the present invention,
Depending on the number of times the external switch is pressed within a certain period of time and the interval time, it is possible to start the function of the document image reading apparatus, and it is possible to execute a plurality of functions of the image reading apparatus with one external switch Becomes

[Brief description of the drawings]

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

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

FIG. 3 is a flowchart of a processing operation sequence according to the first embodiment.

FIG. 4 is a flowchart of a processing operation sequence according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image sensor (CIS) 2 Photodiode 3 Self-occurrence 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 202 Image sensor (CIS) 202 LED 213 External device 215 CPU

Claims (4)

[Claims] An image sensor for converting a read document image into an electrical image signal, an A / D converter for converting the image signal into a digital signal, and an external device for transmitting the digitally converted image signal to an external device. An image reading apparatus comprising: a transfer unit; and a switch for starting reading of the document, wherein the number of times the switch is pressed within a predetermined time is detected. 2. According to the number of times the switch is pressed,
2. The image reading device according to claim 1, wherein the function of the document image reading device is changed to read the document. 3. An image sensor for converting a read document image into an electric image signal, an A / D converter for converting the image signal into a digital signal, and an external device for transmitting the digitally converted image signal to an external device. In a document image reading apparatus having a transfer unit and a switch for starting reading of a document, when the switch is pressed a plurality of times, a second switch and a second switch after the first switch is pressed Is measured until the switch is depressed a plurality of times in the order of the third press,..., And the function of the document reading device is changed according to the time to read the document. Image reading device. 4. The function of the document image reading apparatus is changed according to the number of times the switch is pressed and the time between when the switch is pressed a plurality of times, and the document is read. The image reading device according to claim 1.