CN111727431B

CN111727431B - Electronic device and control method of electronic device

Info

Publication number: CN111727431B
Application number: CN201980013659.1A
Authority: CN
Inventors: 神谷佐武郎; 村木晓子; 奥间健太郎
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 2018-02-14
Filing date: 2019-02-14
Publication date: 2023-12-19
Anticipated expiration: 2039-02-14
Also published as: AR114111A1; JP2022044670A; JP7035977B2; CN111727431A; CN117632835A; JP7226596B2; JP2019139745A

Abstract

In the electronic apparatus provided with the memory and the processor, the processor presents a question in an approval mode shifted from a normal mode by simultaneously operating a plurality of keys, receives an answer to the presented question from an operator, shifts to the normal mode when the answer of the operator matches a correct answer to the question, and shifts from the approval mode to the special function mode when the answer matches a password different from the correct answer to the question.

Description

Electronic device and control method of electronic device

Technical Field

The present disclosure relates to an electronic apparatus and a control method of the electronic apparatus.

Background

A technique has been proposed that can use logging data as input simulation, i.e., a new input operation requiring no human hand at the time of simulation, and can reproduce the input operation at the place of use. (for example, patent document 1)

Prior art literature

Patent literature

Patent document 1: japanese JP-A-S63-193217

Disclosure of Invention

Problems to be solved by the invention

In addition to the technology disclosed in patent document 1, in various data processing apparatuses such as electronic calculators, smart phones, personal computers, and the like having a keyboard and a display unit, switching to a special function mode (for example, inspection mode, maintenance person mode, and the like) for executing a special function of a product by a predetermined key operation is not described on a specification of the product, and a general user cannot know, for example, approval of simultaneous operation of a plurality of preset keys, so that in a state where the product manufacturing is completed, the special function can be executed based on a special program registered in a part of an internal operation program. In the inspection mode, before or after shipment of the product, inspection may be performed based on an inspection program registered in advance in a part of the internal operation program.

However, there may be caused a case where the user senses the switching method to the special function mode by the key operation for any reason and is thus able to perform the special function.

The present disclosure has been made in view of the above circumstances, and an object thereof is to provide an electronic apparatus and a control method of the electronic apparatus capable of controlling a special function that is not easy to execute.

Means for solving the problems

An electronic device includes a memory and a processor. The processor is configured to show questions in an approved mode, receive replies to the questions shown from operators, and switch to a mode different from a special function mode when replies from the operators agree with correct replies to the questions.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present disclosure, special functions that are not easily performed can be controlled.

Drawings

Fig. 1 is a front view illustrating an external configuration of a scientific electronic calculator according to a first embodiment of the present disclosure.

Fig. 2 is a block diagram showing a functional configuration of an electronic circuit of the scientific electronic calculator according to the first embodiment.

Fig. 3 is a flowchart describing the processing of the content in the approval mode of the first embodiment.

Fig. 4 illustrates display contents on the display unit of the first embodiment.

Fig. 5 illustrates transition of display contents on the display unit in the full inspection mode of the first embodiment.

Fig. 6 illustrates transition of display contents on the display unit in the simple inspection mode of the first embodiment.

Fig. 7 is a block diagram describing a functional configuration of an electronic circuit of a scientific electronic calculator according to a second embodiment of the present disclosure.

Fig. 8 is a flowchart describing processing of content in the approval mode of the second embodiment.

Fig. 9 illustrates transition of display contents on the display unit upon switching to the special function control mode of the second embodiment.

Fig. 10 illustrates the transition of display contents on the display unit in the full inspection mode of the second embodiment.

Fig. 11 illustrates transition of display contents on the display unit in the full inspection mode of the second embodiment.

Detailed Description

First embodiment

A scientific electronic calculator is one example of an electronic device. Hereinafter, a first embodiment in which the present disclosure is applied to a scientific electronic calculator will be described in detail with reference to the drawings as an explanation of an electronic device, a control method of the electronic device, and a program.

Fig. 1 is a front view illustrating an external configuration of a scientific electronic calculator 10 according to a first embodiment. In fig. 1, a key input unit 11, a display unit (display) 16, and a solar cell panel 17 are provided on the front surface of the main body.

The key input unit 11 includes: a number/calculation symbol key set 12 for inputting numbers and mathematical equations or instructions to perform calculations; a mathematical function key group 13 for inputting various mathematical functions and starting a storage function; a mode setting key group 14 for displaying menu screens of various operation modes and indicating operation mode settings; and a cursor key 15 for performing a movement operation of a cursor to be displayed in the display 16 for a setting operation of the mode setting key group 14, a calling operation of a calculation equation, a selecting operation of a data item, and the like.

The number/calculation symbol key group 12 includes [0] to [9] (number) keys, [ + ] [ - ] x ] [ ] (four arithmetic operations) keys, [ Ans ] keys, a [ = ] (execution) keys, and [ AC ] (clear) keys for clear instructions, etc.

The mathematical function key group 13 includes mathematical function keys including [ x ] ^-1 ](reciprocal) bond, [ nCr ]](combination) key, [ Pol ]](polar) bond and [ x ] ³ ]A (cube) key, etc.

The MODE setting key group 14 includes a [ SHIFT ] (switch) key, an [ ALPHA ] (alphabet) key, a [ MODE CLR ] (MODE clear) key, an [ ON ] (power ON) key, and the like.

The display unit 16 is constituted by a reflective liquid crystal display panel, and includes a display line in which the uppermost line is a fixed segment such as [ D ], [ SCI ], etc., the second line is a dot matrix line of 6 vertical dots×5 horizontal dots×12 bits, and the third line is a digital display line of 8-shaped segment which is a digital portion of 10 bits and an index portion of 2 bits. The display unit 16 displays the result of the operation of the input key by the operator as the inspector.

The solar cell panel 17 is a solar cell panel configured to generate a part or all of the operating power of the scientific electronic calculator 10. Although not shown, the scientific electronic calculator 10 has a replaceable battery separate from the solar panel 17. Therefore, even in the case where the amount of external light around the scientific electronic calculator 10 is small, and thus the operation power required for display and calculation cannot be supplied through the single solar cell panel 17, power can be supplied by the mounted battery.

Meanwhile, although not shown, the side or the back of the scientific electronic calculator 10 is provided with a card slot for attaching/detaching a memory card, and a communication terminal for performing communication with a connected external device (for example, a USB terminal).

Fig. 2 is a block diagram describing the functional configuration of the electronic circuit of the scientific electronic calculator 10.

The electronic circuit of the scientific electronic calculator 10 includes a processor 21 such as a CPU (central processing unit) as a main device, and a memory 22, a recording medium interface 24, a display unit 16, a key input unit 11, and a communication unit 25 is connected thereto via a bus B. The processor 21 performs computation according to the input operation so that the operator designates the numeric/computation symbol key group 12 or the mathematical function key group 13 as appropriate.

The memory 22 includes a ROM in which an operation program, fixed data, and the like to be executed by the processor 21 embedded in the scientific electronic calculator (electronic device) 10 are stored in a nonvolatile manner, and a RAM in which various data read out from the ROM are to be developed and held. In the memory 22, there are stored an electronic calculator control program 22a, a display control program 22b, and a special function control program 22c, and an input program area 22d and a work area 22e are ensured.

The electronic calculator control program 22a is an operation program stored in the ROM, and is configured to execute various arithmetic processes including mathematical function operations in the normal mode.

The display control program 22b is an operation program stored in the ROM, and is configured to control display contents on the display unit 16 in the normal mode.

The special function control program 22c is an operation program stored in the ROM, and is configured to be executed when switching from the normal mode to the special function mode. Specifically, the special function control program 22c includes a control program executed in the simple inspection mode (step S105), a management program executed in the whole inspection mode (step S107), and a control program executed in the display contrast adjustment processing mode (step S109), which will be described later.

The input program area 22d is an area in the RAM in which an additional program (to be described later) is stored when the additional program is input from the outside.

The work area 22e is an area in the RAM that temporarily holds programs and data when program processing is executed by the processor 21.

The recording medium interface 24 is an interface that is connected to a recording medium 23 such as a memory card mounted on the scientific electronic calculator 10 via a card slot CS, and reads data such as an additional program from the recording medium 23. Under the control of the processor 21, read data such as an additional program is stored in the input program area 22d of the memory 22 via the bus B.

As described above, the communication unit 25 can be connected to an external device such as a personal computer in a wired manner through a communication terminal such as a USB terminal or connected to an external Network (NW) in a wireless manner through a wireless LAN, and is configured to transmit and receive necessary data or the like at the time of version-up of the scientific electronic calculator 10.

Subsequently, the operation of the first embodiment is described. In the following steps, the processor 21 performs processing and determination other than those explicitly described.

Fig. 3 is a flowchart showing processing contents stored in the special function control program 22c of the memory 22 in the approval mode.

In the operation in the normal mode before shipment of the scientific electronic calculator 10, when the operator as the inspector operates a plurality of predetermined keys as approval password keys for switching to the approval mode, for example, three keys of the [ SHIFT ] key and the [ ON ] key of the mode setting key group 14 and the [5] key of the number/calculation symbol key group 12 are simultaneously executed to switch to the approval mode. The approval password key is not limited to three keys, and may be, for example, two keys or four or more keys.

In the normal mode, the processor 21 waits for switching to the approval mode by repeatedly determining whether three keys are simultaneously operated (step S101).

When it is determined that three keys have been simultaneously operated (yes in step S101), the processor 21 shifts to the approval mode.

In the approval mode, the processor 21 randomly or periodically selects one from a plurality of simple questions prepared in advance by the special function control program 22c and displays it on the dot matrix line of the display unit 16 (step S103).

The problem is a mathematical equation (equation) or has a mathematical function that includes an operator (e.g., mathematical inequalities of the question format of +, -, ×, ++) and numbers, with the left member to calculate and the indication [? Right member of ], and the calculation equation is stored as data in the memory 22. A plurality of different modes are prepared, for example [ 3-2=? [ 1+1=? "], [ 2+1=? 5-1=? Etc., as mathematical equations or mathematical inequalities. The correct answers to the questions satisfy mathematical equations or mathematical inequalities of different modes (hereinafter, collectively referred to as "equations"), respectively, and differ from each other in terms of [1], [2], [3] and [4]. In the special function control program 22c, a plurality of passwords for switching to the special function control mode, a plurality of correct answers of values different from the plurality of passwords, and a plurality of questions corresponding to the plurality of correct answers are stored in advance as data, and the passwords can be input by key operation of the operator through the key input unit 11.

Fig. 4 illustrates an aspect in which one problem [ 3-2=? In approval mode, on the dot matrix column of the display unit 16. Here, the correct answer to the question is the number 1. The input key to be the correct answer is set so as not to coincide with any of the cipher keys set in advance for switching to the simple check mode, the full check mode, and the contrast adjustment mode as the special function control mode.

In a state in which the question is displayed in step S103, the processor 21 receives a reply to the displayed question from the operator according to the key input on the key input unit 11. The processor 21 sequentially determines whether the operated key is a first cipher key (e.g., [8] key) of the number/calculation symbol key group 12 that has been previously set to be different from the correct answer of the displayed question (step S104), whether the operated key is a second cipher key (e.g., [9] key) that has been previously set to be different from the correct answer of the displayed question and the first cipher key of the number/calculation symbol key group 12 (step S106), whether the operated key is a third cipher key (e.g., [6] key) that has been previously set to be different from the correct answer of the displayed question, the first cipher key, and the second cipher key (step S108), and whether the operated key is a number key (e.g., [1] key) of the correct answer of the displayed question (step S110).

When it is determined in step S110 that key input of a number as a correct answer to the question has been performed (no in step S104, no in step S106, no in step S108, yes in step S110), the processor 21 displays a text message [ TEST OK ] indicating that the input number is a correct answer on the dot matrix line of the display unit 16 for a predetermined period of time, for example, one second (step S111).

After that, even if the number key as a correct answer is input, the processor 21 does not execute any one of the simple check mode (step S105), the full check mode (step S107), and the display contrast adjustment processing mode (step S109), but executes the mode setting so as to forcibly return to the normal mode (step S112), and ends the processing of fig. 3.

Further, when it is determined in step S110 that the operated key is not any one of the first password key, the second password key, the third password key, and the numeric key of the correct answer to the question (no in step S104, no in step S106, no in step S108), the processor 21 proceeds to step S112, and ends the processing in fig. 3.

When it is determined in step S108 that the operator has operated the third cipher key of the number/calculation symbol key group 12 (no in step S104, no in step S106, yes in step S108), the processor 21 shifts to the display contrast adjustment mode of the display unit 16, which is one of the special function control modes (step S109).

In the contrast adjustment mode, the contrast value that has been set at this time is adjusted to an arbitrary value.

Specifically, after the contrast value that has been set at this time is displayed on the dot matrix line of the display unit 16, as shown in (F) of fig. 5, an operation of the left and right direction keys of the cursor key 15 of the key input unit 11 by the operator is received to increase and decrease the contrast value, and then reflected on the displayed contrast value, as shown in [ ] [ < [ ] h > ] (". Times ] are contrast values).

After the contrast adjustment process, when the operator performs a predetermined key operation, for example, operates the [ AC ] key of the number/calculation symbol key group 12, the processor 21 ends the contrast adjustment process, proceeds to step S112 to perform mode setting so as to return to the normal mode after ending the contrast adjustment mode, which is one of the special function control modes, and then ends the process in fig. 3. ON the other hand, when the [ ON ] key is operated before the operation of the [ AC ] key is finished, the contrast value adjusted until just before is returned to the initial value.

When it is determined in step S106 that the second cipher key of the number/calculation symbol key group 12 has been operated (no in step S104, yes in step S106), the processor 21 shifts to the full check mode which is one of the special function control modes (step S107).

Fig. 5 illustrates conversion of contents displayed on the display section 16 in the full-face inspection mode. Fig. 5 (a) to 5 (D) show displays in which an operator performs wiring inspection on the liquid crystal display panel of the display unit 16 with the naked eye. First, as shown in fig. 5 (a), if appropriate, all displayable segments of the display unit 16 are displayed.

When the operator operates the [ SHIFT ] key in a state where all segments are displayed, all segments of the display unit 16 are turned to a state where they are not displayed, as shown in (B) of fig. 5 (as applicable).

When the [ SHIFT ] key is additionally operated, a display mode [ alternate 1] is displayed as shown in (C) of fig. 5, where half of the segments of each bit on each row are turned on, if applicable. In this display state, the fixed segments are alternately displayed on the uppermost row. Further, in the plurality of dot matrices of the second row in which the respective segments are arranged in the vertical direction and the horizontal direction, dots (segments) vertically and horizontally adjacent to one displayed dot (segment) are not displayed, such as check marks. The third row of digits is displayed such that the digits displayed are not intended specific digits and comma symbols associated with the respective digits are alternately displayed. In this case, regarding 7 segments (8 segments in total) constituting the number 8 and one comma symbol, only four segments are numerically displayed, and 3 segments and one comma symbol are displayed on the next number.

Continuously, when the [ SHIFT ] key is operated, the display mode of [ alternate 2] obtained by inverting [ alternate 1] is displayed as shown in (D) of fig. 5 (as applicable). Fig. 5 (C) and 5 (D) are display patterns for wiring inspection by the naked eye of the operator.

When the operator finishes checking the wiring pattern with the naked eye, the operator operates the SHIFT key to display the code name of the ROM constituting the memory 22 in the scientific electronic calculator 10, as shown in (E) of fig. 5. The code name varies depending on the model of the scientific electronic calculator 10. Meanwhile, the pattern [ AC ] (omitted in (E) of fig. 5) is displayed on the third line of the display unit 16, thereby prompting the operator to press the [ AC ] key to switch from the display state to the next setting.

When the [ AC ] key is additionally operated, the contrast value that has been set for the display unit 16 at this time is displayed as shown in (F) of fig. 5. As described in step S109, by receiving the operations of the right and left keys of the cursor key 15 of the key input unit 11, the contrast value can be increased and decreased. Meanwhile, the pattern [ AC ] (omitted in (F) of fig. 5) is displayed on the third line of the display unit 16, thereby prompting the operator to press the [ AC ] key to switch from the display state to the next setting.

Then, when the [ AC ] key is operated, a full key check state is generated as shown in (G) of fig. 5. Fig. 5 (G) illustrates a state in which the initial count value [00] is displayed at the left end of the dot matrix row in two-digit numbers.

When the operator operates the keys in a predetermined order, for example, all other keys are sequentially operated in the raster scan shape starting from the [ SHIFT ] key located at the upper left end of the key input unit 11, the displayed count value is updated by "+1" each time the key is operated, except for the [ ON ] key which is the power-ON key. The key operation order is set so that when any particular key is operated, the count value is updated according to whether or not the next setting key is operated. Therefore, key operations other than the setting order are not valid and are not counted.

If the connection of the wirings is correct, when the count value [49] corresponding to the total number of keys is displayed, the processor 21 determines that all keys have been operated, and displays a text message [ TEST OK ] indicating that the full check mode has been completed on the dot matrix line of the display unit 16, as shown in (H) of fig. 5. Meanwhile, the pattern [ AC ] (omitted in (H) of fig. 5) is displayed on the third line of the display unit 16, thereby prompting the operator to press the [ AC ] key to switch from the display state to the next setting.

When the [ AC ] key is operated, the processor 21 proceeds to step S112 to perform mode setting for returning to the normal mode, and then ends the processing of fig. 3.

Further, in step S104 after step S103, when it is determined that the operator has operated the first cipher key of the number/calculation symbol key group 12 (yes in step S104), the processor 21 shifts to a simple check mode which is one of the special function control modes (step S105).

Fig. 6 illustrates conversion of contents displayed on the display section 16 in the simple inspection mode. Fig. 6 (a) and 6 (B) show displays for performing wiring inspection of the liquid crystal display panel of the display unit 16 with naked eyes. First, as shown in fig. 6 (a), the processor 21 displays a display mode [ alternate 1] in which half of the segments of each bit on each row are turned on, as shown in fig. 5 (C). In this display state, when the wiring connection is good, the fixed segments are alternately displayed on the uppermost row. In addition, when the wiring connection is good, dots are alternately displayed on the dot matrix row of the second row, as with the check mark. The number display line of the third line is displayed such that the displayed number is not a specific number intentionally, and comma symbols associated with the respective numbers are alternately displayed when the wiring connection is good.

Continuously, when the operator operates the [ SHIFT ] key, the processor 21 displays the display mode of [ alternate 2] obtained by inverting [ alternate 1], as shown in fig. 6 (B), as in fig. 5 (D).

When the operator ends the inspection of the wiring pattern by the naked eye and operates the SHIFT key, the processor 21 displays the code name of the ROM constituting the memory 22 in the scientific electronic calculator 10, as shown in fig. 6 (C), like fig. 5 (E). The code name varies depending on the model of the scientific electronic calculator 10. Further, the pattern [ AC ] (omitted in (C) of fig. 6) is displayed on the third line of the display unit 16, thereby prompting the operator to press the [ AC ] key to switch from the display state to the next setting.

When the operator further operates the [ AC ] key, the processor 21 displays an inspection image for key wiring, as shown in (D) of fig. 6. As shown in fig. 6 (D), several numbers having two bits are displayed on the lattice row at intervals. When the wiring connection is good, as the operator operates the keys of the corresponding numerals through the number/calculation symbol key group 12 of the key input unit 11, the corresponding numerals sequentially disappear.

When the displayed numerals are all key inputs, it is assumed that the inspection of the key wiring has been completed, and the display for current measurement is performed, as shown in (E) of fig. 6. In fig. 6 (E), a number [8] having a relatively large number of dots to be opened is displayed on each of ten digits of the dot matrix row, and a number [8] of most of the segments rotated by the 8-shaped segment is displayed on each of ten digits of the digit display row together with comma symbols of every three digits. In this display state as a reference mode, the internal consumption current is measured to check whether it deviates from a predetermined range of the current value.

When the measured consumption current is within the predetermined range of the current value and thus it is determined that there is no particular problem, the processor 21 sets the power supply of the scientific electronic calculator 10 to off (step S113), and ends the process of fig. 3.

In the simple inspection mode, the processor 21 does not return to the normal mode after the end of processing, but turns off the power of the scientific electronic calculator 10, unlike the full inspection mode.

Thus, in the simple inspection mode, the power supply is automatically turned off immediately after the inspection process. Therefore, in the re-inspection process of any product after the full inspection mode for all products, the number of inspection processes is reduced as compared with the full inspection mode. Therefore, it is possible to simplify the operation, perform the operation efficiently, and suppress the consumption of the power supply mounted to the product at the time of shipment from the manufacturing factory to the minimum.

As described above, according to the first embodiment, in the approval mode, even when a user who does not know a password other than the inspector inputs a correct answer to a question by key operation, the mode is not shifted to the special function control mode but is forced to be directed to the normal mode. Therefore, the user does not uselessly execute the special function control mode.

In the first embodiment, in the approval mode at a pre-stage before switching to the special function control mode, a password key which is different from the correct answer key of the question and which is known only to a qualified person (e.g., inspector) is input in response to a simple question displayed on the display unit 16. This makes it possible to accurately switch to the special function control mode and to perform the process of entering the special function management mode in a secret manner.

In addition, in the first embodiment, a simple question displayed on the display unit 16 at the start of switching to the special function control mode is selected from among a plurality of questions prepared in advance. Therefore, the problem to be displayed is changed every time a key for instructing switching to the special function control mode is designated, so that a pseudo effect can be further increased to avoid performing an actual key operation for switching to the special function control mode.

Further, in the first embodiment, from among a plurality of types of inspection modes (such as a full inspection mode and a simple inspection mode) differing in the number of processes, contents, and the like of inspection, the inspection process is selectively performed corresponding to the key operation. Therefore, it is possible to select a more appropriate inspection mode and perform inspection based on the difference in necessity of performing inspection.

In the first embodiment, as the setting password key, the first password key, the second password key, and the third password key have been exemplified. However, the number of the cipher keys provided may be one or two, and may be four or more, as required. In any case, the cipher key is a key other than a key corresponding to a correct answer to a question.

In the first embodiment, the processing is performed in the order of step S104 (and step S105), step S106 (step S107), step S108 (step S109), and step S110 (step S111). However, the present disclosure is not limited thereto. For example, the processing may be performed in the following order: in the order of step S104, step S106, step S110, and step S108; in the order of step S104, step S108, step S106, and step S110; in the order of step S104, step S108, step S110, and step S106; in the order of step S104, step S110, step S106, and step S108; in the order of step S104, step S110, step S108, and step S106; in the order of step S106, step S104, step S108, and step S110; step S104, step S110 and step S108 are performed in the order of step S106; in the order of step S106, step S108, step S104, and step S110; in the order of step S106, step S108, step S110, and step S104; in the order of step S106, step S110, step S104, and step S108; in the order of step S106, step S110, step S108, and step S104; in the order of step 108, step S104, step S106, and step S110; in the order of step S108, step S104, step S110, and step S106; in the order of step S108, step S106, step S104, and step S110; in the order of step S108, step S106, step S110, and step S104; in the order of step S108, step S110, step S104, and step S106; in the order of step S108, step S110, step S106, and step S104; in the order of step S110, step S104, step S106, and step S108; in the order of step S110, step S104, step S108, and step S106; in the order of step S110, step S106, step S104, and step S108; in the order of step S110, step S106, step S108, and step S104; in the order of step S110, step S108, step S104, and step S106; or in the order of step S110, step S108, step S106, and step S104.

In the first embodiment, a plurality of questions are prepared in the approval mode. However, since keys other than the key for guiding the switching to the special function mode are set as correct answers, the number of questions corresponding to the correct answers may be one.

In the first embodiment, correct answers to a plurality of questions prepared in the approval mode are different for each question. However, the partial correct answers may be the same among the questions.

Further, in the first embodiment, before the approval of the mode, data of the question, a correct answer to the question, and a cipher key for guiding switching to the special function mode are stored in advance in the memory 22, and the question is displayed on the display unit 16 by the display control program based on the data. However, the special function control program 22c may also include a question preparation program configured to prepare questions that have not been set, and after switching to the approval mode, the processor 21 may prepare questions and correct answers thereto according to the question preparation program and display the questions and the like on the display unit 16.

In this case, after switching to the approval mode, a question may be first prepared and a corresponding correct answer may be set, or a correct answer may be first set and a question corresponding to the correct answer may be subsequently prepared. The present disclosure is not limited thereto. On the other hand, in a state where a correct answer and a password key are previously set before the approval mode, after switching to the approval mode, a question corresponding to the correct answer can be prepared by the question preparation program.

Further, before switching to the approval mode, data including one arithmetic equation (such as [ value (correct answer-value K) +value k=.

In this case, after switching to the approval mode, the parameter value K may be set, a question may be prepared from an arithmetic equation based on a correct answer and the parameter value K (for example, [3+1 =. The arithmetic equations stored in the question preparation program may be plural, and one arithmetic equation may be determined before or after the approval mode.

In the first embodiment, a question is displayed to the operator through the display unit, and then a password is input through key input. However, instead of the display on the display unit, the question may be displayed by voice, and the password may be input by the voice of the operator.

Second embodiment

Hereinafter, a second embodiment of applying the present disclosure to a scientific electronic calculator will be described in detail with reference to the accompanying drawings.

The external configuration of the scientific electronic calculator 10' of the second embodiment is substantially the same as that of the scientific electronic calculator 10 shown in fig. 1 of the first embodiment, and the same components are denoted by the same reference numerals, and the description and illustration thereof are omitted.

Further, in the display unit 16, the uppermost row is set as a display row of a fixed segment, the rest is mainly set as a dot matrix area of 31 vertical dots×96 horizontal dots (dot configuration is omitted in the drawing), and arithmetic equations, solutions, guidance messages, and the like are generally displayed on four rows of the dot matrix area, except for a graph or the like.

Fig. 7 is a block diagram of the functional configuration of the electronic circuit of the scientific electronic calculator 10'. The basic configuration is substantially the same as the functional configuration of the electronic circuit shown in fig. 2, and the same components are denoted by the same reference numerals, and the description thereof is omitted.

In the memory 22, an electronic calculator control program 22a, a display control program 22b, and a special function control program 22c' are stored, and an input program area 22d, a work area 22e, and a usage history storage area 22f are ensured.

The special function control program 22c' is an operation program stored in the ROM and executed when switching from the normal mode to the special function mode, and specifically includes a control program to be executed in the full check mode (step S210) and a control program to be executed in the selected check mode (step S212), which will be described later.

In the usage history storage area 22f, for example, a usage history after the power of the scientific electronic calculator 10' becomes on until after the power becomes off is stored. As the usage history, there may be exemplified the number of times of switching to the approval mode, the number of times of correct answers to questions displayed in the approval mode, the number of operations of all keys other than the [ ON ] (power ON) key of the key input unit 11, specifically, the number of operations of [ = ] (execution) key, the number of times of errors occurring during calculation, the time of use of power ON, the calculation mode used, the number of settings of the setting calculation unit or the like, the contents of some digital memories storing numerals, and the like.

As the use time of power-on, a part of time measurement operation performed in the processor 21 for the auto-power-off function is used to count the time after power-on.

The storage contents of the usage history storage area 22f are sequentially updated by the processor 21 in a state where the power is on, and are maintained in a nonvolatile manner even when the power is off.

Subsequently, the operation of the second embodiment is described. In the following steps, the processor 21 performs processing and determination other than those explicitly described.

Fig. 8 is a flowchart showing processing contents stored in the special function control program 22c' of the memory 22 in the approval mode.

In the operation in the normal mode before shipment of the scientific electronic calculator 10', when the operator as the inspector operates a plurality of predetermined keys as approval password keys for switching to the approval mode, for example, three keys of the [ SHIFT ] key and the [ ON ] key of the mode setting key group 14 and the [5] key of the number/calculation symbol key group 12 are simultaneously executed to switch to the approval mode. The approval password key is not limited to three keys, and may be, for example, two keys or four or more keys.

In the normal mode, the processor 21 waits for switching to the approval mode by repeatedly determining whether three keys are simultaneously operated (step S201).

When it is determined that three keys have been simultaneously operated (yes in step S201), the processor 21 shifts to the approval mode.

In the approval mode, the processor 21 acquires information of the usage history that has been stored in the usage history storage area 22f of the memory 22 at this time (step S202).

The processor 21 randomly or periodically selects one of a plurality of simple questions prepared in advance by the special function control program 22c' and displays it on the display unit 16 by using a part of the acquired information of the use history (step S203).

The problem is a mathematical equation (equation) or has a mathematical function that includes an operator (e.g., mathematical inequalities of the question format of +, -, ×, ++) and numbers, with the left member to calculate and the indication [? Right member of ], and the calculation equation is stored as data in the memory 22. A plurality of different modes are prepared, for example [ 3-2=? [ 1+1=? "], [ 2+1=? 5-1=? Etc., as mathematical equations or mathematical inequalities. The correct answers to the questions satisfy mathematical equations or mathematical inequalities of different modes (hereinafter, collectively referred to as "equations"), respectively, and differ from each other in terms of [1], [2], [3] and [4]. Here, each key of [1], [2], [3] and [4] where a correct answer is possible is referred to as a "question correspondence key", and a key that becomes a correct answer to one of the questions shown is referred to as a "correct answer key".

In the special function control program 22c', a plurality of passwords for switching to the special function control mode, a plurality of correct answers of values different from the plurality of passwords, and a plurality of questions corresponding to the plurality of correct answers are stored in advance as data, and the passwords can be input by key operation of the operator through the key input unit 11.

Fig. 9 (a) illustrates an aspect in which one question [ 1+1=? And if the operator wishes, [ Press AC ] for indicating an input to stop the approval mode and return to the normal mode is displayed in the fourth line in the approval mode. Namely: [1] and [2] of the question correspondence keys of [2], [3] and [4] is a correct answer key.

In addition, based on a part of the information of the use history, at the right end of the lattice area, "09/1A" (number of correct answer inputs [9 ]/number of approval mode display [26 ]) is displayed in a score form, for example, the number of times of switching to the approval mode and the number of key inputs of correct answers to the question are displayed by hexadecimal numbers. The display range of (number of key inputs of correct answer)/(number of times of switching to approval mode) is set to 00/01 to FF/FF.

When it is determined in step S201 to switch to the approval mode, the number of times of display of the approval mode is updated to "+1" (yes in step S201). In step S213, when OK is displayed in correspondence with the input of the correct answer key, the number of inputs of the correct answer is updated to "+1".

The number of times of switching to the approval mode and the number of times of inputting a correct answer are displayed on the approval mode screen, so that when the scientific electronic calculator 10 'is subjected to maintenance by a manufacturing company or the like due to a malfunction or the like, the degree to which the user or the like of the scientific electronic calculator 10' is interested in the special function control mode, or the degree to which the user or the like has tried to check, can be perceived.

Here, the problem [ 1+1=? The correct answer to ] is the number 2. All of the plurality of question correspondence keys including the correct answer key to be a correct answer are set so as not to coincide with any of the password keys previously set for switching to the full check mode and the select check mode as the special function control modes.

The processor 21 determines whether any key operation has been performed by the key input unit 11 in a state in which the problem is displayed in step S203 (step S204). When it is determined that any key of the key input unit 11 has not been operated (no in step S204), the processor 21 determines whether a predetermined time of, for example, 5 seconds has elapsed in a state where a key operation for a problem has not been performed (step S205).

When it is determined that the predetermined time has not elapsed in a state where the key operation to the problem has not been performed (no in step S205), the processor 21 returns to the process of step S204.

While repeating the processing of steps S204 and S205 in this way, the processor 21 waits for any key of the key input unit 11 to be operated, and a predetermined time will elapse.

When it is determined that the predetermined time has elapsed in a state where the key operation on the question has not been performed (yes in step S205), the processor 21 stops the approval mode at this point of time, performs the setting for forcing return to the normal mode (step S217), and ends the processing shown in fig. 8.

Fig. 9 (B) illustrates an initial screen of the display unit 16 that has returned to the normal mode. In the initial screen, at the start position of the first line of the dot matrix region of the display unit 16, reverse display is repeatedly performed in which the cursor C of the patterned vertical line or horizontal line is alternately displayed and erased every predetermined period (for example, 0.5 seconds) for causing input calculation.

Further, when it is determined in step S204 that any key of the key input unit 11 has been operated (yes in step S204), the processor 21 sequentially determines: whether the operated key is a first cipher key (e.g., [9] key) of the number/calculation symbol key group 12, which is set in advance to be different from a plurality of preset question correspondence keys including a correct answer key of the displayed question (step S206); whether or not the operated key is a second password key (for example, [6] key) which is set in advance to be different from a plurality of preset question correspondence keys including the correct answer key of the displayed question and the first password key of the number/calculation symbol key group 12 (step S207); whether the operated key is a numeric key (e.g., [2] key) of a correct answer to the displayed question (step S208); and whether the operated key is one of the [ AC ] key or a question correspondence key other than the correct answer key (for example, the [1] key, [3] key and [4] key) (step S215).

When it is determined in step S208 that the correct answer key of the number that is the correct answer to the question has been input (no in step S206, no in step S207, yes in step S208), the processor 21 displays a text message [ TEST OK ] indicating that the input number is the correct answer on the first line of the dot matrix area of the display unit 16 for a predetermined time, for example, one second (step S213), as shown in (D) of fig. 9.

Then, the processor 21 assumes that the operator is not an inspector, and sets the lock flag held in the work area 22e in a nonvolatile manner to an on state so as to prohibit switching to the special function control mode (step S214). After that, the processor 21 executes the setting for forcibly returning to the normal mode (step S217), and ends the processing shown in fig. 8. Specifically, when the lock flag is in the on state, even if the first code key or the second code key is input, switching to a special function control mode such as the check mode is not allowed, as described later in steps S204, S206, and S207.

Further, when it is determined in step S208 that the key of the correct answer key that is not the number of the correct answer to the question has been input (no in step S206), the processor 21 proceeds to step S215. When it is determined in step S215 that the input key is the [ AC ] key or any one of the plurality of question correspondence keys other than the correct answer key (step S215: YES), the processor 21 sets the normal mode (step S217), and ends the processing shown in fig. 8. On the other hand, when it is determined in step S215 that the input key is neither any one of the plurality of question-corresponding keys other than the correct answer key nor the [ AC ] key (no in step S215), the processor 21 assumes that the operator is a inspector and sets the lock flag held in the work area 22e in a nonvolatile manner to the off state so as to release the switching prohibition on the special function control mode (step S216), and returns to the processing of step S204.

When it is determined in step S206 that the key to be operated is the first cipher key (e.g., the [9] key) of the number/calculation symbol key group 12 preset to be different from the correct answer key of the displayed question (yes in step S206), the processor 21 determines whether the lock flag has been set to the off state at this point of time (step S209).

When it is determined that the lock flag has not been set to the off state but has been set to the on state at this point in time (no in step S209), the processor 21 assumes that a number as a correct answer to the question at an earlier time has been entered, and the operator is not an inspector at this point in time, performs setting of forced return to the normal mode without performing the processing of the full-face inspection mode (step S217), and ends the processing shown in fig. 8.

Further, when it is determined in step S209 that the lock flag is set to the off state (yes in step S209), the processor 21 assumes that the operator is an inspector, and shifts to the full-scope inspection mode which is one of the special function control modes (step S210).

Fig. 10 and 11 illustrate the conversion of the content displayed on the display unit 16 in the full inspection mode. Fig. 10 (a) to 10 (E) show displays of appropriate inspection of wiring conduction of the liquid crystal display panel of the display unit 16 by the operator with the naked eye. First, as shown in fig. 10 (a), if appropriate, all displayable segments of the display unit 16 are displayed.

When the inspector as an operator operates the [ SHIFT ] key in a state where all segments are displayed, all segments of the display unit 16 are turned to a state where they are not displayed, as shown in (B) of fig. 10 (as applicable).

When the [ SHIFT ] key is additionally operated, if applicable, one frame is displayed by each dot on the outer peripheral side of the dot matrix region, as shown in (C) of fig. 10.

Continuously, when the [ SHIFT ] key is operated, if applicable, a display mode [ alternate 1] in which half dots in the dot matrix region are alternately displayed is displayed, as a check flag, as shown in (D) of fig. 10.

Continuously, when the [ SHIFT ] key is operated, a display mode [ alternate 2] obtained by inverting [ alternate 1] is displayed, as shown in (E) of fig. 10. Fig. 10 (D) and 10 (E) are display patterns for wiring inspection by the naked eye of the operator where appropriate.

When the operator completes the inspection of the wiring pattern with the naked eye, the operator operates the SHIFT key to display the code name of the ROM constituting the memory 22 of the scientific electronic calculator 10', etc., as shown in (F) of fig. 10. The code name varies depending on the model of the scientific electronic calculator 10'. Meanwhile, a mode [ Press AC ] for causing the key ([ AC ] key) to be operated to switch from the display state to the next setting is displayed on the fourth row of the lattice area. When the screen is switched from fig. 10 (a) to fig. 10 (F), the screen is not switched even if a key other than the [ SHIFT ] key is operated.

When the [ AC ] key is additionally operated, the contrast value that has been set for the display unit 16 at this time is displayed as shown in (G) of fig. 10. As displayed on the third and fourth rows of the dot matrix region, the contrast value can be increased and decreased by receiving the operations of the right and left keys of the cursor key 15 of the key input unit 11.

Then, when the [ AC ] key is operated, a key check state is displayed as shown in (a) of fig. 11. When moving the screen from fig. 10 (G) to fig. 11 (a), the screen does not transition even if a key other than the [ AC ] key is operated. Fig. 11 (a) to 11 (C) illustrate a state in which the initial count value [00] is displayed in two digits at the left end of the first row of the dot matrix region.

When the operator operates the keys in a predetermined order, for example, all other keys are sequentially operated in the raster scan shape starting from the [ SHIFT ] key located at the upper left end of the key input unit 11, the displayed count value is updated by "+1" each time the key is operated, except for the [ ON ] key which is the power-ON key.

Fig. 11 (B) depicts a display state of the display unit 16 when the [ × ] th key has been operated. The key operation order is set so that when any particular key is operated, the count value is updated according to whether or not the next setting key is operated. Therefore, key operations other than the setting order are not valid and are not counted.

Fig. 11 (C) depicts a display state of the display unit 16 in which the [ Ans ] key, which is the [48] th key among all 49 keys, has been operated. When the lower right [ = ] key of the key input unit 11 is additionally operated, the key check process ends and a check result of whether or not the wiring connection is correct is displayed as shown in (D) of fig. 11.

In fig. 11 (D), a [ TEST OK ] indicating that the TEST has been completed is displayed on the first line of the dot matrix area of the display unit 16, and [ Reset All ] and [ Press AC ] for resetting the check result and causing operation of the [ AC ] key for switching to the normal mode are displayed on the third line and the fourth line, respectively.

Then, when the operator operates the [ AC ] key of the key input unit 11 according to the display, the processor 21 completes the full check mode in step S210, performs setting to return to the normal mode (step S217), ends the processing shown in fig. 8 and returns to the initial screen of the normal mode, as shown in (E) of fig. 11.

Further, when it is determined in step S207 that the key to be operated is the second cipher key (e.g., the [6] key) of the number/calculation symbol key group 12 that has been preset to be different from the correct answer key of the displayed question (no in step S206, yes in step S207), the processor 21 determines whether the lock flag has been set to the off state at this point in time (step S211).

When it is determined that the lock flag has not been set to the off state but has been set to the on state at this point in time (no in step S211), the processor 21 assumes that a number as a correct answer to the question at an earlier time has been entered, and the operator is not an inspector at this point in time, performs setting of forced return to the normal mode without performing processing of selecting the inspection mode (step S217), and ends the processing shown in fig. 8.

When it is determined in step S211 that the lock flag is set to the off state (yes in step S211), the processor 21 shifts to a selection check mode that is one of the special function control modes (step S212).

Fig. 9 (C) depicts a screen for prompting the operator to select which of the inspection liquid crystal display panel ([ 1:disp ]), the inspection ROM ([ 2:ver/SUM ]), the inspection key ([ 3:key ]), and the inspection contrast ([ 4:cont. ]) is to be displayed on the first and second lines of the dot matrix region of the display unit 16 at the start of the selection of the inspection mode. In addition, a guide [ Press AC ] for releasing the selection of the inspection mode and causing the return to the normal mode is displayed in the fourth line of the lattice area.

When the [1] key of the key input unit 11 corresponding to [1:disp ] is operated from the screen state shown in fig. 9 (C), the processing shown in fig. 10 (a) to 10 (E) is performed. After the inspection is completed, when the operator operates the [ SHIFT ] key, the processor 21 returns to the initial screen for selecting the inspection mode shown in fig. 9 (C).

When the [2] key of the key input unit 11 corresponding to [2:ver/SUM ] is operated from the screen state shown in (C) of fig. 9, the processor 21 displays the code name or the like of the ROM constituting the memory 22 of the scientific electronic calculator 10', as shown in (F) of fig. 10. The code name varies depending on the model of the scientific electronic calculator 10'. Meanwhile, [ Press AC ] for causing the operation to return to the key of the original screen ([ AC ] key) from the display state is displayed on the fourth row of the lattice area. After the inspection is completed, when the operator operates the [ AC ] key, the processor 21 returns to the initial screen for selecting the inspection mode shown in fig. 9 (C).

When the [3] key of the key input unit 11 corresponding to the [ 3:key ] is operated from the screen state shown in fig. 9 (C), a key check state is displayed as shown in fig. 11 (a).

In the key check state, as described above with reference to fig. 11 (a) to 11 (C), when the operator sequentially operates all other keys except the [ ON ] key as the power-ON key in a predetermined order in the raster scan shape, the displayed count value "+1" is updated every time the key is operated. This operation is repeated until all 49 keys are operated in the correct order. After the inspection is completed, when the operator operates the [ AC ] key in the screen shown in fig. 11 (D), the processor 21 returns to the initial screen shown in fig. 9 (C) for selecting the inspection mode.

Further, when the [4] key of the key input unit 11 corresponding to [4:cont ] is operated from the screen state shown in (C) of fig. 9, a contrast check state is displayed as shown in (G) of fig. 10. After the inspection is completed, when the operator operates the [ AC ] key, the processor 21 returns to the initial screen for selecting the inspection mode shown in fig. 9 (C).

Further, when the [ AC ] key of the key input unit 11 is operated from the screen state shown in fig. 9 (C), as shown in the fourth line, the processor 21 releases the selection check mode, performs the setting to return to the normal mode (step S217), as shown in fig. 11 (E), and ends the processing of fig. 8.

Meanwhile, in fig. 9 (a), the number of display times of the approval mode screen and the number of input times of the correct answer are displayed at the right end of the dot matrix area. Alternatively, other information may be displayed, such as information representing the usage history of the user of the scientific electronic calculator 10'.

Fig. 9 (E) illustrates a display screen at the start of the approval mode, instead of fig. 9 (a). Based on the partial usage history information, an indication [ EXE 04] indicating that the [ = ] (execution) key has been operated four times, and an indication [02H ] indicating that the usage time is 2 hours are displayed on the first and second rows of the lattice area. A portion of the information of the usage history is also displayed at this point in time so that the last minute of usage of the scientific electronic calculator 10' can be easily perceived by the user when the operator is an inspector.

Meanwhile, as information of the usage history, the total number of operation times of all keys of the key input unit 11, the number of times of occurrence of errors when inputting mathematical function equations (for example, total usage time), the number of times of switching of various calculation modes, the number of times of setting for switching of angle units including radian units or degree units, for example, the contents of an independent memory or a variable memory in which numbers are stored in a nonvolatile manner, and the like are also considered. In addition, in addition to the state in which the problem is displayed, information of the use history may be displayed in the problem display condition as shown in fig. 9 (a) to 9 (E), and the information of the use history may be switched from a screen of the normal mode in which it is displayed on the upper right side of fig. 9 (a) for a predetermined time to a screen in which all are turned off, as shown in fig. 10 (a), since the [ SHIFT ] key and the [ AC ] key are simultaneously operated, in a switching state in which the power supply is turned off.

As described in detail above, according to the second embodiment, when a user who does not know a password other than the inspector performs key input of a correct answer to a question in an approval mode, the lock flag is set to an on state. Therefore, even when a password key that is different from a correct answer to a question and that is known only to a qualified person (e.g., inspector) is accidentally input in response to a simple question displayed on the display unit 16, switching to the special function control mode due to the open state can be reliably prevented.

In the second embodiment, in the approval mode as the early stage before switching to the special function control mode, a key input for turning off the setting is provided, by which the inspector can release the lock flag from the state in which the lock flag has been set to the on state, so that the processing in the special function control mode of the scientific electronic calculator 10' in which the lock flag is set to the on state can also be performed.

Further, in the second embodiment, as part of the use history, the number of display of the approval mode screen, the number of input of correct answers, the number of key operations, the use time, and the like are also displayed at the end of the approval mode screen. Thus, the inspector can easily perceive the portion of the usage aspect of the scientific electronic calculator 10' before switching to the special function control mode.

Meanwhile, as described above, the first and second embodiments of applying the present disclosure to a scientific electronic calculator have been described. However, the present disclosure is not limited to scientific electronic calculators and other calculators, and may be applied to various electronic devices requiring special function control, such as smart phones, tablets, and general-purpose appliances, because a method for asking questions and a method for answering questions are provided.

In this disclosure, the program may be applied in any way. The program may be stored in a computer readable storage medium such as a floppy disk, CD (compact disc) -ROM, DVD (digital versatile disc) -ROM, memory card, or the like for application. In this case, the scientific electronic calculator 10, 10' may be provided with an interface capable of being connected to a storage medium. In addition, when the program is superimposed on a carrier wave, the program may be applied through a communication medium such as the internet. For example, programs may be notified and transmitted on a Bulletin Board System (BBS) over a communication network. Further, the above-described processing can be performed by activating and executing a program in the same manner as other application programs under the control of an OS (operating system).

In addition, the present disclosure is not limited to the above-described embodiments, and various modifications may be made without departing from the gist thereof. Moreover, the respective embodiments may be implemented in appropriate combination. In this case, a combined effect is achieved. Further, in the above-described embodiments, various inventions are included, and can be introduced by appropriately combining a plurality of constituent elements. For example, when some of all the constituent elements described in the embodiments are omitted even if they can solve the above-described problems and achieve the above-described effects, a configuration in which some of the constituent elements are omitted may be introduced as the present invention.

Meanwhile, the entire contents of japanese patent application No. 2018-24417 (filed on day 14 of 2 nd 2018) and japanese patent application No. 2018-215761 (filed on day 16 of 11 th 2018) are incorporated in the present specification.

Description of symbols

10 10'… scientific electronic calculator (electronic device), 11 … key input unit, 12 … digit/computation symbol key set, 13 … mathematical function key set, 14 … mode setting key set, 15 … cursor key, 16 … display unit, 17 … solar panel, 21 … processor, 22a … memory, 22a … electronic calculator control program, 22B … display control program, 22C' … special function control program, 22d … input program area, 22e … working area, 22F … use history storage area, 23 … recording medium, 24 … recording medium interface (I/F), 25 … communication unit, B … bus, C … cursor, CS … card slot

Claims

1. An electronic device, comprising:

memory device

The processor may be configured to perform the steps of,

wherein the processor is configured to:

showing a problem in the approval mode;

receiving a reply from the operator to the illustrated problem;

setting a lock flag to prohibit switching to a special function mode and to a mode different from the special function mode when the reply from the operator coincides with a correct answer to the question; and is also provided with

Switching from the approval mode to the special function mode when the processor determines that the reply from the operator is consistent with a password different from the correct answer to the question;

wherein the mode different from the special function mode is a normal mode before switching to the approval mode;

in the approval mode, the processor randomly or periodically selects one from a plurality of questions prepared in advance and displays the selected question on a display of the electronic device;

wherein the special function mode includes:

a plurality of inspection modes different from each other, in which the electronic device is to be inspected; and

and a contrast adjustment mode in which the processor adjusts the contrast of the display.

2. The electronic device of claim 1, wherein the memory stores data including the password, a correct answer to a value different from the password, and a question corresponding to the correct answer.

3. The electronic device of claim 1, wherein the memory stores data including the password, a plurality of correct answers to values different from the password, and a plurality of questions corresponding to the plurality of correct answers, and

Wherein the processor releases the setting of the lock flag when the reply from the operator is different from any one of a correct answer to a question shown by one of the plurality of questions, a password different from the correct answer to the one shown question, another correct answer to another question other than the one shown question, and a clear instruction.

4. The electronic device according to any one of claims 1 to 3, wherein the memory stores data of a usage history of the electronic device, and

wherein the processor is configured to show at least a portion of the data of the usage history with the question in the approval mode.

5. The electronic device of claim 4, wherein the data of the usage history includes at least one of a number of times to switch to the approval mode, a number of times the reply from the operator agrees with the correct answer to the question, and a time of use.

6. The electronic device of any of claims 1-3, further comprising:

An input key with which the operator replies;

wherein the display is configured to display a result of the operation of the input key.

7. The electronic device according to any one of claims 1 to 3, wherein the approval mode is switched by inputting a preset approval password.

8. The electronic device of any of claims 1-3, wherein the memory stores data for a plurality of questions, and

wherein the processor is configured to select a question from the data and to show the selected question in the approval mode.

9. The electronic device of any of claims 1-3, wherein the problem is one of a mathematical equation and a mathematical inequality comprising operators and numbers.

10. The electronic device of any of claims 1-3, wherein the processor is configured to perform calculations according to a digital input operation of the operator.

11. A control method of an electronic device, comprising,

wherein the processor of the electronic device is configured to:

showing a problem in the approval mode;

receiving a reply from the operator to the illustrated problem;

wherein the special function mode includes:

12. The control method of an electronic device according to claim 11, wherein the electronic device includes a memory that stores data including the password, a correct answer to a value different from the password, and a question corresponding to the correct answer.

13. The control method of an electronic device according to claim 12, wherein the memory stores data including the password, a plurality of correct answers to values different from the password, and a plurality of questions corresponding to the plurality of correct answers, and

14. The control method of an electronic device according to claim 12 or 13, wherein the memory stores data of a usage history of the electronic device, and

15. The control method of an electronic device according to claim 14, wherein the data of the usage history includes at least one of a number of times of switching to the approval mode, a number of times that the reply from the operator coincides with the correct answer to the question, and a usage time.

16. The control method of an electronic apparatus according to any one of claims 11 to 13, wherein the electronic apparatus further comprises:

An input key with which the operator replies; the display is configured to display a result of the operation of the input key.

17. The control method of an electronic device according to any one of claims 11 to 13, wherein the approval mode is switched by inputting a preset approval password.

18. The control method of an electronic apparatus according to claim 12 or 13, wherein the memory stores data of a plurality of questions, and

19. The control method of an electronic device according to any one of claims 11 to 13, wherein the problem is a mathematical equation including an operator and a number.

20. The control method of an electronic device according to any one of claims 11 to 13, wherein the processor is configured to perform calculation according to a digital input operation of the operator.