JPH11191032A - Input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue a correct procedure inputting even if the next item to be inputted becomes unclear in the middle of inputting items by reading and displaying operation guidance information which corresponds to the next input item based on items which are already inputted when the next key input can not be detected even when a prescribed time that is previously set passes at the time of inputting. SOLUTION: A CPU 12 controls the entire facsimile equipment. A ROM 13 stores various software programs which carry out key inputs, display processing of operation guidance, etc. Operation memory 16 stores operation guidance that corresponds to each input item when plural items are inputted in a prescribed order by using plural kinds of input keys. An operational port 15 discriminates the next input item based on items that are already inputted, reads operation guidance information that corresponds to the next input item from the memory 16 and shows it when it does not detect the next key input even when a prescribed time that is previously set passes at the time of inputting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input device in various devices such as a facsimile machine, a PHS, a portable telephone, and a personal computer.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus which prints and displays operation guidance information for explaining an operation method when a help key is pressed at the time of various operation inputs (for example, JP-A-2-293176, JP-A-4-1992). 32352, and JP-A-4-222158).

According to such a facsimile apparatus, when the operator does not know the input procedure of a predetermined input operation requiring a plurality of key inputs, the operator presses a help key to display desired operation guidance information on a display screen. Since the key input procedure can be referred to by displaying or printing on recording paper, a predetermined input operation can be performed after confirming the key input procedure based on the operation guidance information.

[0004]

However, in the above-described facsimile apparatus, if the next item to be input cannot be found during key input, the help key is pressed to request the operation guidance information, so that the input operation is performed. There is a problem that operability at the time of key input is poor because it is necessary to interrupt, invalidate the already input items, check the input procedure based on the operation guidance information displayed on the display screen, and then perform the input operation again from the beginning. was there.

Further, if the operation guidance information is printed every time the key input procedure is not understood, the recording paper is wasted. If the recording paper on which the operation guidance information is printed is taken out and the input procedure is confirmed, it is difficult to print the operation guidance information. However, there is a problem in that it is not possible to quickly know the next item to be input, and it takes time to perform the operation.

[0006] The present invention has been made in view of the above points, and is correct even if the next item to be input cannot be found during input of a predetermined item in a predetermined procedure using a plurality of types of input keys. An object of the present invention is to enable the input operation of a procedure to be continued to the end.

[0007]

According to the present invention, in order to achieve the above object, in an input device having a plurality of types of input keys, when inputting a plurality of items in a predetermined order using the respective input keys, Operation guidance information storage means for storing operation guidance information corresponding to each of the input items, and when the next key input is not detected even after a predetermined period of time elapses when the above items are input, the previously input key input An operation guidance information display unit is provided for determining a next input item based on the item, reading operation guidance information corresponding to the next input item from the operation guidance information storage unit, and displaying the read operation guidance information.

In an input device having a plurality of types of input keys, an operation guidance for storing operation guidance information corresponding to each input item when inputting a plurality of items in a predetermined order using each of the input keys. Information storage means;
When an erroneous input is detected for a predetermined number of times continuously when inputting the above item, the next input item is determined based on the already input item, and the operation guidance information storage unit corresponds to the next input item. Operation guidance information display means for reading and displaying the operation guidance information to be performed may be provided.

Further, in an input device having a plurality of types of input keys, an operation guidance for storing operation guidance information corresponding to each input item when inputting a plurality of items in a predetermined order using each of the input keys. Information storage means, when detecting a key input of a display request for operation guidance information at the time of inputting the above item, determining the next input item based on the already input item, and keeping the already input item valid, Operation guidance information display means for reading and displaying operation guidance information corresponding to the next input item from the operation guidance information storage means may be provided.

The input device according to the first aspect of the present invention stores in advance operation guidance information corresponding to each input item when a plurality of items are input in a predetermined order using a plurality of types of input keys, If the next key input is not detected even after a predetermined period of time elapses when inputting the above item, the next input item is determined based on the already input item, and the next input item is determined. Read and display operation guidance information.

Therefore, when the operator cannot understand the item to be input next and cannot perform key input, the operator can easily select the item to be input next by operating guidance information displayed a predetermined time after the key input is interrupted. It is possible to know, and the input operation of the correct procedure can be performed almost without delay until the end.

Further, the input device according to claim 2 of the present invention comprises:
Operation guidance information corresponding to each input item when a plurality of items are input in a predetermined order using a plurality of types of input keys is stored in advance, and a predetermined number of times are continuously set at the time of inputting the above items. When an erroneous input is detected, the next input item is determined based on the already input item, and the operation guidance information corresponding to the next input item is read and displayed.

Therefore, when the operator makes a mistake in key input to be input next, the operator can easily know the correct item to be input next by the operation guidance information displayed when the erroneous input is repeated a predetermined number of times. The input operation of the correct procedure can be performed almost without delay until the end.

Further, the input device according to a third aspect of the present invention stores in advance operation guidance information corresponding to each input item when a plurality of items are input in a predetermined order using a plurality of types of input keys. When a key input of a display request for operation guidance information is detected at the time of inputting the above item, the next input item is determined based on the already input item, and the next input item is kept valid while the next input item remains valid. Read and display operation guidance information corresponding to the input item.

Therefore, when the operator cannot determine the next item to be input during the input operation, the operator inputs an instruction for requesting the display of the operation guidance information at any time, thereby validating the previously input item. The next input item can be easily confirmed by the operation guidance information displayed as it is, and the input operation can be performed subsequently, so that the input operation does not have to be repeated from the beginning every time the operation procedure is confirmed.

[0016]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a block diagram showing a configuration of a facsimile apparatus according to one embodiment of the present invention. This facsimile apparatus is realized by a microcomputer, and includes a scanner 1, a plotter 2, an operation display unit 3, an image memory 4, a parameter memory 5, a battery 6, a bit map memory 7, a communication control unit 8, a modem 9, encoding and decoding. Unit 10, network control device 11, CPU1
2, ROM 13, image forming apparatus 14, operation port 15,
It comprises an operation memory 16 and a bus 17.

The scanner 1 is an image reading device that reads image information to be transmitted or copied from a document by facsimile by an optical reading unit such as a CCD. The plotter 2 is a printing device such as a laser printer that prints image information read by the scanner 1, image information received by facsimile, and image information of various management reports on recording paper.

The operation display unit 3 includes various function selection keys such as a one-touch key registration key, a numeric keypad for inputting a FAX number, a character key for inputting a label such as a destination name, a Yes key for confirming input contents, and a one-touch key registration. It has a plurality of types of input keys such as function keys for executing registration, etc., and a display such as an LCD, and performs various operation inputs such as facsimile transmission and one-touch key registration. Various operation screens such as registration, and operation guidance at the time of an input operation according to the present invention are displayed.

The image memory 4 is a memory for temporarily storing image information read by the scanner 1 and image information received by facsimile in a compressed state. The parameter memory 5 is a memory for storing various parameters necessary for controlling the entire facsimile apparatus and displaying operation guidance during key input according to the present invention.

The battery 6 is a backup power supply for the parameter memory 5, and supplies power so that the contents stored in the parameter memory 5 are not erased even when the power of the facsimile apparatus is turned off. Bitmap memory 7
Is a memory for developing the image information stored in the image memory 4 into a bitmap when the image information is printed by the plotter 2. The communication control unit 8 controls various information at the time of facsimile transmission / reception.

The modem 9 modulates and demodulates image information during facsimile transmission and reception, and transmits various procedure signals for the transmission control. The encoding / decoding unit 10 compresses image information to be transmitted by facsimile according to a known encoding method,
The image information received by facsimile is decoded and reproduced to the original image information. The network control device 11 connects to a telephone line, and performs a predetermined line control relating to transmission / reception to / from a destination device of facsimile transmission / reception via the telephone line.

The CPU 12 is a microcomputer that controls the entire facsimile machine. ROM 13
This is a read-only memory that stores various software programs executed by the CPU 12 to perform various processes such as control of the entire facsimile apparatus, key input according to the present invention, and display processing of operation guidance therein. When developing the image information stored in the image memory 4 into the bitmap memory 7, the image forming apparatus 14 performs predetermined addition, deletion, and other various conversions related to image formation on the image information.

The operation port 15 monitors a key input operation from the operation display unit 3, and displays operation guidance of key input for the operator on a display of the operation display unit 3 based on the monitoring result, and various types of operation for the LED. Performs management and display operations during operation. Operation memory 16
Is a memory that previously stores operation guidance information indicating operation procedures of various key inputs displayed by the operation port 15 to the operator. The bus 17 is a communication line for exchanging various data between the above-described units.

That is, when the operation memory 16 inputs a plurality of items in a predetermined order using a plurality of types of input keys, a function of operation guidance information storage means for storing operation guidance information corresponding to each input item is provided. If the operation port 15 does not detect the next key input even after a predetermined time has elapsed when inputting the item, the operation port 15 determines the next input item based on the already input item and performs the operation. It functions as operation guidance information display means for reading and displaying operation guidance information corresponding to the next input item from the guidance information storage means.

When the operation port 15 detects an erroneous input a predetermined number of times in succession at the time of inputting the above item, the operation port 15 determines the next input item based on the already input item, and It also functions as operation guidance information display means for reading and displaying the operation guidance information corresponding to the next input item from the storage means.

Further, when detecting the key input of the display request of the operation guidance information at the time of inputting the item, the operation port 15 determines the next input item based on the already input item, and The function of the operation guidance information display means for reading out the operation guidance information corresponding to the next input item from the operation guidance information storage means and displaying the read operation guidance information is also provided while the operation guidance information is kept valid.

Next, automatic display processing of operation guidance information at the time of a one-touch key registration operation in the facsimile apparatus will be described. First, the operation memory 16 previously stores operation guidance information indicating an operation guide of each item to be input by a one-touch key registration operation in a correct operation procedure. Then, the correct procedure of the one-touch key registration operation is performed in the following order (1) to (8).

(1) Depress one-touch registration key (one-touch key registration function execution instruction key) (2) Select input of one-touch key for registration of FAX number (3) Input Yes key to confirm selection of one-touch key ( 4) Input of FAX number to be registered in one-touch key selected as registration destination (numeric keypad) (5) Input of Yes key to confirm input of FAX number (6) Destination to be registered in one-touch key selected as registration destination (7) Enter Yes key to confirm label input (8) Function key input to execute one-touch key registration

FIG. 1 is a flowchart showing a process for automatically displaying operation guidance information when the next key input is not performed even after a predetermined time has elapsed during a one-touch key registration operation. In this process, the operation port 15 monitors a key input operation of the operation display unit, and determines whether or not the depression of the one-touch registration key is detected in step (indicated by “S” in the figure) 1.

If it is determined in step 1 that the press of the one-touch registration key has not been detected, the process is terminated. However, if the press of the one-touch registration key has been detected, the process proceeds to step 2 where the preset operation is performed during the one-touch key registration operation. It is determined whether the next key input has not been detected even after the predetermined time has elapsed.

The next key input is detected within a predetermined time set in advance for each key input in the judgment of step 2, and when all items are input in a correct procedure, this processing is terminated.
If the next key input is not detected after the predetermined time elapses, the process proceeds to step 3 to determine the next item to be input based on the already input item and to display the operation guide message. Then, the message "Display a guide for one-touch registration operation" is displayed on the operation display section.

Proceeding to step 4, it is determined whether or not the press of the one-touch key of the registration destination of the FAX number is detected before the predetermined time has elapsed from the input of the one-touch key registration key. If the push is not detected, the process proceeds to step 12 and the FA is stored in the operation memory.
The operation guidance information "Please select the one-touch key of the registration destination of the FAX number" corresponding to the item relating to the selection input of the one-touch key of the registration destination of the X number is read out, a guide is displayed on the operation display part, and the process proceeds to step 5.

In step 5, it is determined whether or not the press of the Yes key has been detected until a predetermined time has elapsed since the input of the one-touch key. If detected, the flow proceeds to step 6, and if not, the flow proceeds to step 13. Y from operation memory
The operation guidance information “Press the Yes key” corresponding to the item related to the input of the es key is read out, a guide is displayed on the operation display unit, and the process proceeds to step 6.

In step 6, it is determined whether or not the input of the FAX number has been detected until a predetermined time has elapsed since the input of the Yes key. If detected, the flow proceeds to step 7, and if not, the flow proceeds to step 14. FAX from operation memory
Read the operation guidance information "Enter the fax number to register" corresponding to the item related to the number entry,
A guide is displayed on the operation display unit, and the process proceeds to step S7.

When the FAX number is input, the operation guidance information "Please input the FAX number to be registered" is displayed even if the next digit number is not input before the predetermined time has elapsed. It may be.

In step 7, it is determined whether or not the press of the Yes key has been detected until a predetermined time has elapsed since the input of the FAX number. If detected, the process proceeds to step 8, and if not detected, the process proceeds to step 15. Yes from operation memory
The operation guidance information “Please press the Yes key” corresponding to the item related to the key input is read out, a guide is displayed on the operation display section, and the process proceeds to step 8.

In step 8, it is determined whether or not the input of the Yes key corresponding to the input of the label (address information such as the destination name) is detected before a predetermined time elapses from the input of the Yes key. If detected, proceed to step 9 to determine whether or not label input has been detected. If detected, proceed to step 10; if not detected, proceed to step 16 to enter items related to label input from the operation memory. Read the corresponding operation guidance information "Please input the label such as the destination name" and
A guide is displayed on the operation display unit, and the process proceeds to step S10.

In step 10, it is determined whether or not the press of the Yes key is detected before a predetermined time elapses from the input of the label. If detected, the process proceeds to step 11; , The operation guidance information “Please press the Yes key” corresponding to the item related to the input of the Yes key is read out, a guide is displayed on the operation display unit, and the process proceeds to step 11.

In step 11, it is determined whether or not the press of the function key is detected before a predetermined time elapses from the input of the Yes key.
Proceed to step 8 to read the operation guidance information “Press the function key” corresponding to the item related to the function key input from the operation memory, display a guide on the operation display section, and detect the press of the function key.
The registration is executed, and the process ends.

As described above, if there is no next key input even after a lapse of a predetermined time during the one-touch key registration operation, a guide for notifying the next item (information and input key) to be input is displayed. Even when the key input is delayed due to the operator not knowing the item to be input next, the input operation can be continued to the end according to the guide.

Further, even if the operator does not himself make a display request by key input, a guide for notifying the next item to be input is automatically displayed, so that the operator can display a plurality of items using a plurality of types of input keys. The input operation can be completed without any delay and the operability can be remarkably improved.

Next, a description will be given of an automatic display process of the operation guidance information when the facsimile apparatus has made an erroneous input a predetermined number of times continuously during the one-touch key registration operation. FIG. 3 is a flowchart showing an automatic display process of operation guidance information when a wrong input is made a predetermined number of times continuously during a one-touch key registration operation.

In this process, the operation port 15 monitors the key input operation of the operation display unit, determines whether or not the pressing of the one-touch registration key is detected in step 21. If the pressing of the one-touch registration key is not detected, This processing ends.

If it is determined in step 21 that the one-touch registration key has been pressed, the flow advances to step 22 to continuously input a wrong number of keys (except for the next item to be input) for a predetermined number of times during the one-touch key registration operation. It is determined whether or not (nack) corresponding to the input is detected.

If it is determined in step 22 that all the items have been input in the correct procedure by the key input operation within the predetermined number of times set in advance, this processing is terminated. When input is detected,
Proceeding to step 23, the next input item is discriminated based on the already input item, and the display shifts to the operation guide display, where a message "Display a guide for one-touch registration operation" is displayed on the operation display section.

After detecting the depression of the one-touch key registration key in the judgment of the step 21, the judgment processing of the step 23 is executed, and the judgment processing of the step 22 is executed when an erroneous input is detected continuously for a predetermined number of times. You may make it.

Proceeding to step 24, it is determined whether or not it has been detected that the one-touch key of the registration destination of the FAX number has been pressed. If detected, the process proceeds to step 25; The operation guidance information corresponding to the item related to the selection and input of the one-touch key of the registration destination of the FAX number from the operation memory is determined by selecting the one-touch key of the registration destination of the FAX number from the operation memory. Is read out, a guide is displayed on the operation display section, and the routine proceeds to step 25.

In step 25, it is determined whether or not the press of the Yes key has been detected. If it has been detected, the process proceeds to step 26. If not, it has been determined that the erroneous input at the time of inputting the Yes key has been performed. Then, the process proceeds to step 33, where the operation guidance information “Please press the Yes key” corresponding to the item related to the input of the Yes key is read from the operation memory, a guide is displayed on the operation display unit, and the process proceeds to step 26.

In step 26, it is determined whether or not the input of the FAX number has been detected. If the input has been detected, the process proceeds to step 27. If not, it is determined that the input of the FAX number has been erroneously performed. Go to operation memory and fax
Read the operation guidance information "Enter the fax number to register" corresponding to the item related to the number entry,
A guide is displayed on the operation display unit, and the process proceeds to step 27.

In step 27, it is determined whether or not the press of the Yes key has been detected. If it has been detected, the process proceeds to step 28. If not, it has been determined that the erroneous input at the time of inputting the Yes key has been performed. Then, the process proceeds to step 35, where the operation guidance information “press the Yes key” corresponding to the item related to the input of the Yes key is read out from the operation memory, a guide is displayed on the operation display unit, and the process proceeds to step 28.

In step 28, it is determined whether or not the input of a Yes key for inputting a label (address information such as a destination name) is detected. If not detected, the flow proceeds to step 31; It is determined whether or not an input has been detected.

If it is determined in step 29 that a label input has been detected, the flow advances to step 30. If no label input has been detected, it is determined that a label has been erroneously input. The guidance information "Please input a label such as a destination name" is read out, a guide is displayed on the operation display unit, and the process proceeds to step 30.

In step 30, it is determined whether or not the press of the Yes key is detected. If it is detected, the process proceeds to step 31. If not, it is determined that the Yes key is erroneously input and the process proceeds to step 37. , The operation guidance information “Y
Please press the es key. "is read, a guide is displayed on the operation display section, and the routine proceeds to step 31.

In step 31, it is determined whether or not the press of the function key has been detected. If detected, the one-touch registration process is terminated. If not detected, it is determined that the input of the function key is erroneous. Go to step 38, read the operation guidance information "Press the function key" corresponding to the item related to the function key input from the operation memory, display the guide on the operation display section, execute the registration when the function key press is detected, This processing ends.

In this way, when the operator continues to input an item other than the item to be input next several times during the one-touch key registration operation, a guide for notifying the operation display unit of the correct item to be input next is automatically provided. The operator can input correct items according to the guide.

Next, a process of displaying operation guidance information when a help key is pressed during a one-touch key registration operation in the facsimile apparatus will be described. FIG.
9 is a flowchart showing a process of displaying operation guidance information when a help key is pressed during a one-touch key registration operation.

In this process, the operation port 15 monitors the key input operation of the operation display unit, determines whether or not the pressing of the one-touch registration key is detected in step 41, and if the pressing of the one-touch registration key is not detected, This processing ends.

If it is determined in step 41 that the press of the one-touch registration key has been detected, the flow advances to step 42 to determine whether or not the help key has been pressed during the one-touch key registration operation. Alternatively, when the press of the help key is detected, the process proceeds to step 43 while holding the previously input item, and the next input should be performed based on the already input item. The item is determined, and the process proceeds to step 44.

After detecting the depression of the one-touch registration key in the judgment of step 41, the judgment processing of step 43 may be executed, and the judgment processing of step 42 may be executed.

At step 44, it is determined whether or not the press of the one-touch key of the registration destination of the FAX number is detected.
If detected, the process proceeds to step 45. If not detected, it is determined that a help request for knowing an item to be input is made after inputting the one-touch registration key. Operation guidance information “FA
Please select the one-touch key of the registration number of the X number. ", A guide is displayed on the operation display unit, and the process proceeds to step 45.

In step 45, it is determined whether or not the press of the Yes key has been detected. If it has been detected, the process proceeds to step 46. If it has not been detected, the item to be inputted after the one-touch key is selected is known. Is determined to be a help request,
Proceeding to step 53, the operation guidance information "press the Yes key" corresponding to the item relating to the input of the Yes key is read out from the operation memory, a guide is displayed on the operation display section, and the flow proceeds to step 46.

In step 46, it is determined whether or not the input of the FAX number is detected.
7, if it is not detected, it is determined that the request is a help request for knowing the item to be input after the Yes key is input, and the process proceeds to step 54, where the operation guidance information corresponding to the item related to the input of the FAX number is registered from the operation memory. FAX
"Please enter a number" and display a guide on the operation display unit, and then proceed to step 47.

In step 47, it is determined whether or not the press of the Yes key has been detected. If it has been detected, the process proceeds to step 48. If it has not been detected, the item to be input after the FAX number is input is known. , The operation guidance information corresponding to the item relating to the input of the Yes key is read from the operation memory, and the guidance is displayed on the operation display section.

In step 48, it is determined whether or not the input of the Yes key for the input of the label (address information such as the destination name) is detected.
If yes, proceed to step 49 to determine whether or not label input has been detected.

If it is determined in step 49 that a label input has been detected, the process proceeds to step 50. If not, a label request is selected and then a help request for knowing the item to be input is determined. Then, the operation guidance information “Please input the label such as the destination name” corresponding to the item related to the label input is read out from the operation memory, a guide is displayed on the operation display unit, and the process proceeds to step 50.

In step 50, it is determined whether or not the depression of the Yes key is detected.
Proceed to 1 and if not detected, judge that it is a help request for the item to be input after label input, and proceed to step 57 to operate guidance information corresponding to the item related to the input of Yes key from the operation memory "Press the Yes key" Is read out, a guide is displayed on the operation display section, and the routine proceeds to step 51.

In step 51, it is determined whether or not the press of the function key is detected. If detected, the one-touch registration processing is terminated.
Judge as a help request to know the item to be input after key input, proceed to step 58, read operation guidance information "Press function key" corresponding to item related to input of function key from operation memory, and display operation When a press of a function key is detected, a registration process is executed, and this process ends.

In this way, even if the help key is input during the one-touch registration operation and the guide is displayed, the input operation can be continued while keeping the items already input. There is no need to start over from the beginning.

In the above-described processing, the guide display may be notified to the operator by a buzzer sound when the next item to be input is determined. In the above-described processing, the automatic display of the operation guidance information at the time of the one-touch key registration operation has been described. However, the automatic display of the operation guidance information is also performed in operations such as speed dial registration, group registration, confidential communication, and memory transmission. Can be implemented in the same way as

Further, in this embodiment, the facsimile apparatus has been described. However, a predetermined procedure is performed by using a plurality of types of input keys such as a personal handy phone system (PHS), a portable telephone apparatus, various navigation apparatuses, and a personal computer. The same can be applied to a device that requires entry of an item.

[0071]

As described above, according to the input device of the present invention, the key input operation from the operator is monitored, and the operation guidance information indicating the next item to be input is displayed based on the monitoring result. Therefore, even if the operator does not know the next item to be input in the course of inputting a predetermined item in a predetermined procedure using a plurality of types of input keys, the operator can use the operation guidance information automatically displayed. The input operation of the correct procedure can be continued to the end.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an automatic display process of operation guidance information when a next key input is not performed even after a predetermined time has elapsed during a one-touch key registration operation in the facsimile apparatus shown in FIG.

FIG. 2 is a block diagram showing a configuration of a facsimile apparatus according to one embodiment of the present invention.

FIG. 3 is a flowchart illustrating an automatic display process of operation guidance information when erroneous input is performed a predetermined number of times continuously during a one-touch key registration operation in the facsimile apparatus illustrated in FIG. 2;

4 is a flowchart showing a process of displaying operation guidance information when a help key is pressed during a one-touch key registration operation in the facsimile apparatus shown in FIG. 2;

[Explanation of symbols]

 1: scanner 2: plotter 3: operation display section 4: image memory 5: parameter memory 6: battery 7: bitmap memory 8: communication control section 9: modem 10: encoding / decoding section 11: network control device 12: CPU 13: ROM 14: Image forming apparatus 15: Operation port 16: Operation memory 17: Bus

Claims (3)

[Claims] 1. An input device provided with a plurality of types of input keys, wherein operation guidance information corresponding to each input item is stored when a plurality of items are input in a predetermined order using the respective input keys. An information storage unit for determining a next input item based on a previously input item when the next key input is not detected even after a predetermined time has elapsed when inputting the item; An input device, comprising: operation guidance information display means for reading and displaying operation guidance information corresponding to the next input item from the information storage means. 2. An input device provided with a plurality of types of input keys, wherein operation guidance information corresponding to each input item is stored when a plurality of items are input in a predetermined order using the respective input keys. An information storage unit, when an erroneous input is detected a predetermined number of times in succession at the time of inputting the item, a next input item is determined based on the input item, and the next input item is determined from the operation guidance information storage unit. An operation guidance information display means for reading and displaying operation guidance information corresponding to the input item of (1). 3. An operation device comprising a plurality of types of input keys, wherein operation guidance information corresponding to each input item is stored when a plurality of items are input in a predetermined order using each of the input keys. Information storage means, when detecting the key input of the display request of the operation guidance information at the time of inputting the item, determine the next input item based on the already input item, while keeping the already input item valid, An input device, comprising: operation guidance information display means for reading and displaying operation guidance information corresponding to the next input item from the operation guidance information storage means.