JP2001283328A - Electronic cash register - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption without any trouble in the use of an electronic cash register. SOLUTION: The cash register is provided with a storage means 7 for storing the display time conditions of plural display devices 1, 21 to 2N and a display control means 4 for controlling the ON/OFF of display of respective display devices 1, 21 to 2N on the basis of the time conditions stored in the storage means 7 and the counting result of a counting means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic cash register having a plurality of display devices, and more particularly, to an electronic cash register for stopping display of a display device which meets a condition among a plurality of display devices. The present invention relates to a cash register device.

[0002]

2. Description of the Related Art Many electronic devices are provided with a display device, and this display device often consumes a large amount of power. Therefore, a technique for reducing the power consumption of the display device by stopping the display of the display device when the display is unnecessary is proposed in Japanese Patent Application Laid-Open No. 3-27420. That is, in this technique, when the period during which no key operation is performed exceeds the set period, the display on the display device is stopped. Then, when a key operation is performed during the display stop period, the display on the display device is restarted.

[0003] Further, there has been proposed an electronic cash register apparatus to which the above technique is applied. In this configuration, when a key operation is not performed for a certain period, a display device for a customer and a display device for an operator are displayed. The display with the device
It stops at the same time.

[0004]

However, when the above technique is used, the following problems have occurred. That is, after the key operation is performed, the display device performs the display until the set period elapses, even if the display is not necessary. For this reason, a situation has been caused in which unnecessary power is consumed in the display device.

[0005] Further, after the store is closed, when the operator causes the display device on the operator side to display the display for checking the sales, etc., it is not necessary to show the display to the customer.
Since the display device on the customer side is also displayed, useless power is consumed on the display device on the customer side.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to stop display of each of a plurality of display devices in accordance with a time condition indicating that display is necessary. It is another object of the present invention to provide an electronic cash register that can reduce power consumption without causing trouble in use.

[0007] In addition to the above-mentioned object, in the period of opening the store, both the customer side display device and the operator side display device perform the display, and in the period of closing the store, the display only on the operator side display device is used. Without inconvenience
An object of the present invention is to provide an electronic cash register which can further reduce power consumption.

In addition to the above-mentioned object, in addition to the above-mentioned purpose, a period until a display is stopped after a key operation is not inputted for each of the display devices can be set, so that only the display of the corresponding display device is stopped. Accordingly, an object of the present invention is to provide an electronic cash register that can further reduce power consumption.

[0009] In addition to the above object, when the operation mode is set to a mode in which transactions are not performed with a customer, display is performed only on the display device on the operator side and unnecessary display is stopped, thereby causing a trouble in use. It is another object of the present invention to provide an electronic cash register that can further reduce power consumption.

[0010] In addition to the above object, when a key operation is input, the display on the display device whose display has been stopped is restarted, so that both the customer and the operator can confirm the registration of the amount. An object of the present invention is to provide an electronic cash register that can be transferred immediately.

[0011]

In order to solve the above-mentioned problems, an electronic cash register according to the present invention comprises a plurality of display devices, an input device for inputting data such as numerical values, and a timing device for performing timing. It is applied to an electronic cash register having a, a storage means for storing the time condition of the display of the plurality of display devices, based on the time condition stored in the storage means and the time measurement result of the time measurement means, A display control unit that controls on / off of display for each of the plurality of display devices.

That is, when a plurality of display devices are provided, at each time, a display device requiring display and a display device not requiring display can be divided. On the other hand, the display control means controls on / off of the display of each of the plurality of display devices based on the time condition of the display of the plurality of display devices and the result of the clocking of the timekeeping means. Therefore, a display device whose display is meaningless in terms of time is turned off, and a display device requiring display is turned on. In other words, if the period during which the display device can be turned off is added for all the display devices, the result of the addition can make the off period of the display device longer as compared to the case where the ON / OFF of all the display devices is determined at the same time.

Further, in addition to the above configuration, the present invention is applied to an electronic cash register having a customer-side display device for displaying to a customer and an operator-side display device for displaying to an operator. Stores the set closing time and opening time, and the display control means matches the time measured by the timing means with any time from the closing time to the opening time stored in the storage means. Sometimes, the display on the customer side display device is turned off and the display on the operator side display device is turned on, and the time measured by the time measuring means is any time from the store opening time to the store closing time stored in the storage means. When they match, the display of both the customer side display device and the operator side display device is turned on.

[0014] That is, during the period from the closing time to the opening time, since the business of the store is stopped, there is no need to display it to the customer. Therefore, when the time measured by the clock means coincides with any time from the closing time to the opening time, even if the display on the customer side display device is turned off, there is no trouble in use. In addition, the power consumption is reduced by the power that should be consumed by the customer-side display device.

[0015] In addition to the above configuration, the storage means includes:
Stores the customer-side display period set in association with the customer-side display device and the operator-side display period set in association with the operator-side display device, and the display control means,
When the non-input period during which no input is performed on the input device exceeds the customer display period, the display of the customer display device is turned off. When the non-input period exceeds the operator display period, the display of the operator display device is performed. Is turned off.

That is, the period during which the display must be turned on after the input device is no longer input differs between the customer display device and the operator display device. Therefore, when the non-input period exceeds the customer-side display period, the display of the customer-side display device is turned off, and when the non-input period exceeds the operator-side display period, the display of the operator-side display device is turned off. The off period of the display device can be made longer than when the customer display device and the operator display device are simultaneously turned off.

Further, in addition to the above configuration, the present invention is applied to an electronic cash register having a plurality of operation modes, and the display control means is adapted to execute the operation when the operation mode is an operation mode for conducting a transaction with a customer. When the display of both the customer-side display device and the operator-side display device is turned on, and the operation mode is an operation mode corresponding to only the operator, the display of the customer-side display device is turned off and the operator-side display device is turned off. Is turned on.

That is, when the display of the customer-side display device is turned off in an operation mode different from the operation mode for conducting a transaction with the customer, the power that would have been consumed by the customer-side display device in this operation mode is reduced. Will be reduced. In addition, when the operation mode is different from the operation mode in which a transaction with the customer is performed, the display on the customer side display device is not required. Therefore, even if the display on the customer side display device is turned off, there is no problem in use.

In addition to the above configuration, when the display of at least one display device is turned off and an input is made to the input device, the display control means turns on the display of the display device which has been turned off. To

That is, when an input is made to the input device, all of the plurality of display devices shift to the display ON state.
Both the customer and the operator can confirm the entered value.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described with reference to the drawings.

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of an electronic cash register according to the present invention.

In the figure, an operator-side display device 1 comprises:
This is a block for displaying information for an operator who operates the electronic cash register. Therefore, the details of the operations performed by the operator, the sales amount, the amount received from the customer,
In addition, the change amount and the like are displayed. Customer side display 2
₁ ,..., 2 _N are blocks for displaying information for the customer, in which the amount of purchased goods, the amount of change, and the like are displayed.

The display drive circuit 11 is provided on the operator side table.
A driving circuit for driving the display device 1;
12₁, ..., 12_NIs the customer-side display device 2₁, ...
・, 2 _NThis is a circuit for driving. Therefore, the display
Live circuits 11, 12₁, ..., 12_NEach of
Has a display controller and driver transistors, etc.
ing. In addition, the display power supply circuit 9 is a display for the operator.
Device 1 and customer-side display device 2₁, ..., 2_NAnd for display
This is a block for supplying the operation power supply.

The operator-side display device 1 and
For each of the customer-side display devices 2, any number of devices can be provided as needed. In the present embodiment, one operator-side display device 1 and one customer-side display device 2 ₁ (N = 1).

The input device 6 is a block provided with a plurality of key switches and the like, and is used to input a price of a product and the like. In addition, time conditions for display on the operator-side display device 1 and the customer-side display device 2 (such as a store opening time and a store closing time, a period from when key operation is not input to when the display is turned off, etc.) are input. Is done.

The storage device 7 is a block (storage means) for storing a numerical value input to the input device 6, a calculation result calculated by the calculation device 4, and the like. Therefore, the store opening time and the store closing time input to the input device 6 are stored. In addition, when the input to the input device 6 is stopped, when the display of the operator-side display device 1 is turned off (operator-side display period), or when the input to the input device 6 is stopped, storing period (customer-side display period) until turning off the display of the customer-side display device 2 _1.

The timer 5 is a block (time measuring means) for measuring the time. By cooperating with the arithmetic unit 4, the timer 5 measures a period during which no input is made to the input device 6 (no input period).

The mode switching device 8 is a block for switching the operation mode. The operation modes that can be switched by the mode switching device 8 are roughly classified into two types of operation modes: an operation mode for conducting a transaction with a customer and an operation mode for not conducting a transaction with a customer.

More specifically, the operation mode for conducting a transaction with the customer is a registration mode for registering the price of the product purchased by the customer. In addition, an operation mode in which transactions with customers are not performed (operation mode related only to the operator)
Is a setting mode for pre-registering unit prices of various products, an inspection mode for checking sales details, a checkout mode for checking sales details, a service mode for checking the operation of various hardware, and a store opening time and The operation mode is for inputting a store closing time, a customer display period, and an operator display period.

The peripheral circuit 10 is a block having a DC source for supplying operating power to the logic circuit portion of the present embodiment. In addition, a communication device 101 for communicating with a host computer or a peripheral device to which the present embodiment is connected via a communication line such as RS232C is provided.

The arithmetic unit 4 is a block composed of a microcomputer as a main part, and performs control for executing main functions as an electronic cash register. Therefore, an operation is performed on the numerical value input to the input device 6. The display drive circuits 11, 12 ₁ ,.
- 12 by performing the _N control, performs the control of the display contents of the operator-side display device 1 and their customers side display device 2 _1, and a control of the display on-off. Further, it controls the peripheral circuit 10.

Further, the arithmetic unit 4, based on the measurement result of the stored time condition and the timer 5 to the storage device 7, and controls the respective display on-off of the operator-side display device 1 and the customer-side display device 2 ₁ (Construct display control means).

Specifically, the time measured by the timer 5 is
Time from closing time to opening time stored in storage device 7
When it is time, the customer display device 2₁Turn off display
Control to turn on the display of the operator-side display device 1
Do. Also, is the time measured by timer 5 the opening time
When the time is from the store closing time to the store closing time,
₁And the display of the operator-side display device 1 are turned on.
Control.

Further, no-input period in which the input is not performed in the input device 6, when exceeding the customer-side display period stored in the storage device 7 performs control to turn off the display of the customer-side display device 2 _1. Further, when the non-input period exceeds the operator-side display period stored in the storage device 7, control is performed to turn off the display of the operator-side display device 1.

The arithmetic unit 4 includes a customer display unit 2 ₁ ,
Alternatively, when at least one of the displays on the operator-side display device 1 is turned off and an input is made to the input device 6, control is performed to turn on the display of the display device that has been turned off.

In the store opening hours, the operation mode
The operation mode in which the transaction mode is to conduct transactions with customers (registration mode).
C), the customer-side display device 2₁And the operator side
Control for turning on the display with the display device 1 is performed. On the other hand,
Operation mode is set to another operation mode (operator only).
Corresponding operation mode), the customer-side display device 2 ₁
Is turned off and the display on the operator side display device 1 is turned off.
Control is performed.

FIG. 2 is a flowchart showing the main operation of the first embodiment corresponding to the first and second aspects of the present invention. The operation of the first embodiment will be described with reference to FIG.

By operating the mode switching device 8, the operation mode is set to a mode for setting a time condition. Then, by using the input device 6, a store opening time and a store closing time are input. The opening time and closing time input at this time are stored in the storage device 7 (storage means).

The store opening time and the store closing time are stored in the storage device 7.
As a method of storing the data in the storage device 7, a method of storing the data in the storage device 7 via the peripheral circuit 10 from the host computer side is also possible.

In the state where the store opening time and the store closing time are stored in the storage device 7, the power switch (not shown) is turned on, and the electronic money register is set to the operating state (step S1). When it is in the operating state, the arithmetic unit 4
Checks whether the time measured by the timer 5 is earlier than the store opening time stored in the storage device 7. Then, when it is earlier time than opening time controls to turn off the display of the customer-side display device 2 ₁ (step S2, S3). Further, control is performed to turn on the display of the operator-side display device 1 (this step is not shown).

Next, the arithmetic unit 4 checks whether or not the time measured by the timer 5 is the store opening time.
And, when the time measured is the opening time,
Performs a control to turn on the display of the customer-side display device 2 ₁ (Step S4). Therefore, opening time after the display and is turned on customer side display device 2 _first display and operator side display device 1.

Next, the arithmetic unit 4 checks whether or not the time measured by the timer 5 is the closing time.
And, when the time counted becomes the closing time,
Performs control to turn off the display of the customer-side display device 2 ₁ (step S5, S6). At this time, the display on the operator-side display device 1 is maintained in the ON state. Therefore, closing time after only the display of the operator-side display device 1 is turned on, the display of the customer-side display device 2 ₁ is turned off.

[0044] In summary, the time when the power is turned on is, when it is between from opening time until closing time (band operating time), and a display of customer-side display device 2 ₁ of the display and the operator side display device 1 Turn on. The time the power is turned is when it is between from closing time to opening time (non-business hours), the display of the customer-side display device 2 ₁ is turned off, the display of the operator-side display device 1 is turned on .

FIG. 3 is a flowchart showing the main operation of the second embodiment corresponding to the third and fifth aspects of the present invention. The operation of the second embodiment will be described with reference to FIG.

By operating the mode switching device 8, the operation mode is set to the time condition setting mode. Then, by using the input device 6, the customer-side display device 2
A time condition for turning off the display ₁ (customer-side display period) and a time condition for turning off the display of the operator-side display device 1 (operator-side display period) are input. The customer-side display period and the operator-side display period input at this time are stored in the storage device 7.

[0047] Incidentally, the customer-side display period described above, consists of no longer performed to the input device 6, a value indicating a period until turning off the display of the customer-side display device 2 _1. The operator-side display period is a value indicating a period from when the input to the input device 6 is stopped to when the display on the operator-side display device 1 is turned off.

[0048] That is, since no longer performed to the input device 6, a period until the display is turned off, for each of the customer-side display device 2 ₁ and the operator side display device 1, so that it can be set individually Has become.

When normal use is assumed, the customer-side display period is set to a shorter period than the operator-side display period.

The method of storing the customer-side display period and the operator-side display period in the storage device 7 may be such that the host computer stores the display period in the storage device 7 via the peripheral circuit 10. It is possible.

When the power switch is turned on during the period from the store opening time to the store closing time in a state where the above-mentioned customer-side display period and operator-side display period are stored in the storage device 7, the arithmetic unit 4 displays the customer-side display period. to turn on the display of device 2 _1. Further, the display of the operator-side display device 1 is turned on (step S11). The arithmetic unit 4 includes a timer 5
Is reset to start the timing of a non-input period, which is a period during which no input is performed on the input device 6 (step S12), and then the process proceeds to step S13.

In step S13, the arithmetic unit 4
It is checked whether an input has been made to the input device 6. If no input is made to the input device 6, the operation proceeds to step S13.
Then, the process proceeds to step S14, where the value of the measured non-input period is compared with the customer-side display period (step S14).
If the value of the non-input period is smaller than the value of the customer-side display period, the process proceeds to step S15, and the value of the non-input period is compared with the value of the operator-side display period. If the value of the non-input period is smaller than the value of the operator-side display period, the process proceeds to step S13, and the presence or absence of input to the input device 6 is checked.

Therefore, if no input is made to the input device 6 and the value of the non-input period is smaller than both the customer-side display period and the operator-side display period, steps S13 to S13 are performed.
The loop operation of S15 is executed.

On the other hand, when an input is made to the input device 6 during execution of the loop operation of steps S13 to S15, the operation shifts from step S13 to step S11. Therefore, the display of the customer-side display device 2 _first display and the operator side display device 1 when turned on, the state of the display is continued. In step S12, the timer 5 that measures the non-input period is reset, and the timer 5 restarts the operation of measuring the non-input period.

Therefore, for example, if the customer-side display period is set to 3 minutes and the operator-side display period is set to 5 minutes, when the next input is made to the input device 6 within 3 minutes, the loop of steps S13 to S15 is performed. Operation or step S1
The operations of 1 to S13 are performed. Therefore, the customer-side display device 2 _first display and the operator side display display device 1 is maintained in both turned on.

On the other hand, when the period during which no input is performed on the input device 6 (no input period) exceeds 3 minutes, the value of the no input period measured by the timer 5 becomes larger than the value of the customer display period. . Therefore, the operation shifts from step S14 to step S16, and the customer-side display device 2
The display of ₁ turns off. Thereafter, when no input is made to the input device 6, steps S13, S14, S1
6, the loop operation of S15 is executed. As a result, the display of the customer-side display device 2 ₁ is turned off, the display of the operator-side display device 1 is that the stays lit.

If the period during which no input is made to the input device 6 (no input period) exceeds 5 minutes, the timer 5
Thus, the value of the non-input period measured by the above becomes larger than both the customer display period and the operator display period. Therefore, the operation shifts from step S15 to step S17, and the display on the operator-side display device 1 is turned off. Thereafter, when no input is made to the input device 6, steps S13, S14, S16, S15,
The loop operation of S17 will be executed. As a result, the display of the customer-side display device 2 ₁ and the operator side display device 1
Will continue to be turned off.

[0058] Display of customer-side display device 2 ₁ and the display of the operator-side display device 1, in both the state in which the OFF,
When an input is performed on the input device 6, the operation proceeds to step S1.
Transition from 3 to step S11, the arithmetic unit 4, to turn on both the display of the customer-side display device 2 ₁ and the operator side display device 1. Further, the timer 5 for measuring the non-input period is reset, and the measurement of the non-input period is restarted (step S).
12).

[0059] Note that in the period of up to 5 minutes no-input period minutes to 3 (period customer side display device 2 _first display is off, the display of the operator-side display device 1 is turned on), the input to the input device 6 Is performed, the operation proceeds to step S13.
Then, control goes to step S11. Therefore, the display of the customer-side display device 2 ₁ is turned off, the display of the operator-side display device 1 is the state which has been turned on, the customer-side display device 2 _first display and operator side display device 1 displays the ON state Move to

FIG. 4 is a flowchart showing the main operation of the third embodiment corresponding to the fourth aspect of the present invention. The operation of the third embodiment will be described with reference to FIG.

When the power switch is turned on during the business hours of the store (the period from the opening time to the closing time) (step S21), the arithmetic unit 4 checks the operation mode selected by the mode switching unit 8. At this time,
If the selected operation mode is, for example, a registration mode (an operation mode for registering the price of a product purchased by a customer), the arithmetic unit 4 determines that the operation mode is an operation mode for conducting a transaction with the customer, Turn on the display of the customer-side display device 2 ₁ (step S22, S23). Further, the display of the operator-side display device 1 is turned on (this step is not shown).

On the other hand, when the operation mode selected by the mode switching device 8 is, for example, a mode for setting the above-mentioned time condition, the arithmetic device 4 performs the transaction with the customer in the selected operation mode. It determines that the no operation mode, turn off the display of the customer-side display device 2 ₁ (step S22, S24). On the other hand, the display of the operator-side display device 1 is turned on (this step is not shown).

The operation mode selected by the mode switching device 8 in the arithmetic unit 4 includes a setting mode for pre-registering unit prices of various products, an inspection mode for checking sales contents, and a settlement of sales contents. Checkout mode,
In the case of service mode for performing an operation confirmation of various hardware, it determines that the operation mode is not performed transactions with customers, turn off the display of the customer-side display device 2 ₁ (step S22, S24) . On the other hand, the display of the operator-side display device 1 is turned on.

[0064]

As described above, the electronic cash register according to the present invention is applied to an electronic cash register having a plurality of display devices, and the time condition of the display of the plurality of display devices. And display control means for controlling on / off of the display of each of the plurality of display devices based on the time condition stored in the storage means and the clock result of the clock means. Accordingly, at each of the times, the display is turned off for a display device whose display is meaningless in time, and the display is turned on for a display device that needs to be displayed. As a result, when the period during which the display is turned off is added for all the display devices, the addition result makes it possible to lengthen the off period of the display device as compared with the case where the on / off of all the display devices is determined at the same time. In addition, power consumption can be reduced without causing trouble in use.

Further, the storage means stores the set closing time and the opening time, and the display control means stores the time measured by the time keeping means from the closing time to the opening time stored in the storing means. When the time coincides with the time, the display on the customer side display device is turned off and the display on the operator side display device is turned on, and the time measured by the timekeeping means is one of the times from the opening time to the closing time stored in the storage means. When the time coincides, the display on both the customer display device and the operator display device is turned on. Therefore, at any time from the store closing time to the store opening time, the power consumption is reduced by the power that should have been consumed by the customer-side display device. Moreover, the period in which the display on the customer-side display device is turned off is a period in which there is no customer, so there is no problem in use. Therefore, the power consumption can be further reduced without causing any trouble in use.

The storage means stores a customer-side display period set in association with the customer-side display device and an operator-side display period set in association with the operator-side display device. When the non-input period during which no input is performed on the input device exceeds the customer display period, the display of the customer display device is turned off. When the non-input period exceeds the operator display period, the display of the operator display device is turned off. I have to. Therefore, the off period of the display device can be extended as compared with the case where the customer display device and the operator display device are simultaneously turned off, so that the power consumption can be further reduced.

When the operation mode is set to an operation mode for conducting a transaction with the customer, the display control means turns on the display of both the customer side display device and the operator side display device, and the operation mode corresponds only to the operator. In this operation mode, the display on the customer side display device is turned off and the display on the operator side display device is turned on. Therefore, when the operation mode is different from the operation mode in which a transaction with the customer is performed, it is possible to reduce the amount of power that should have been consumed by the customer-side display device. Further, the period in which the display on the customer side display device is turned off is a period in which the display on the customer side display device is unnecessary. Therefore, the power consumption can be further reduced without causing any trouble in use.

When the display of at least one display device is turned off and an input is made to the input device, the display control means turns on the display of the display device which has been turned off. Therefore, when an input is made to the input device, all of the plurality of display devices shift to the display ON state, so that both the customer and the operator can confirm the input value. It is possible to immediately shift to a state where both the customer and the operator can confirm the registration of the amount.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of an electronic cash register according to the present invention.

FIG. 2 is a flowchart showing a main operation of the first embodiment corresponding to the first and second aspects of the present invention;

FIG. 3 is a flowchart showing main operations of a second embodiment corresponding to the third and fifth aspects of the present invention;

FIG. 4 is a flowchart showing a main operation of a third embodiment corresponding to the invention described in claim 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operator side display device 2 Customer side display device 4 Computing device (display control means) 5 Timer (time measuring means) 7 Storage device (storage means)

Claims (5)

[Claims] 1. An electronic cash register comprising a plurality of display devices, an input device to which data such as numerical values are input, and a time keeping means for performing time keeping, wherein a time condition of display of the plurality of display devices is determined. Storage means for storing, and display control means for controlling on / off of a display for each of the plurality of display devices based on the time condition and the time measurement result of the time measurement means stored in the storage means. Electronic cash register. 2. The system further comprises: a customer-side display device for displaying to a customer; and an operator-side display device for displaying to an operator, wherein the storage means stores the set closing time and opening time, The display control means, when the time measured by the time keeping means coincides with any time from the store closing time to the store opening time stored in the storage means, turns off the display of the customer side display device and sets the operator side When the display of the display device is turned on, and the time measured by the timing device coincides with any time from the store opening time to the store closing time stored in the storage device, the customer-side display device and the operator-side display device 2. The electronic cash register according to claim 1, wherein both displays are turned on. 3. The storage unit stores a customer-side display period set in association with the customer-side display device and an operator-side display period set in association with the operator-side display device. The control means turns off the display of the customer-side display device when the non-input period during which no input is performed on the input device exceeds the customer-side display period, and when the non-input period exceeds the operator-side display period, 3. The electronic cash register according to claim 2, wherein the display on the display device is turned off. 4. A display device comprising a plurality of operation modes, wherein the display control means displays both the customer-side display device and the operator-side display device when the operation mode is an operation mode for conducting a transaction with a customer. When the operation mode is set to an operation mode corresponding only to the operator, the display on the customer side display device is turned off and the display on the operator side display device is turned on. Item 3. The electronic cash register according to Item 3. 5. The display control means according to claim 1, wherein when the display of at least one display device is turned off, when an input is made to the input device, the display of the display device which has been turned off is turned on. The electronic cash register according to claim 3, wherein