JP3357537B2 - Data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can display an apparatus main body having a power saving operation function and contents based on a video signal output from the apparatus main body on condition that a synchro signal output from the apparatus main body is received. The present invention relates to a data processing device having a simple display.

[0002]

2. Description of the Related Art In FIG. 4, a data processing device (for example, a merchandise sales registration data processing device) 10 is formed of a device main body (control unit) 20 and a display (display) 40.

The apparatus main body 20 is formed of a personal computer, and is connected to standard input / output devices (keyboard, display 40) and external input / output devices.

The display 40 includes a CRT 41, an amplifier 42, a contrast adjustment circuit 43, an interface (a switch unit 45, a video unit 46, a synchronization unit 47) and a synchronization adjustment circuit 48, and receives a synchro signal Ssy output from the apparatus body 20. Apparatus main body 2 on condition that it is received
0 based on the video signal Svd output from CRT
41 can be displayed.

The power saving operation function of the apparatus main body 20 has a power saving request generated automatically or manually (ST in FIG. 5).
30 (YES), power down (reduce power consumption)
This is a function of performing the power saving operation (ST33). In addition, the screen saver function activates a screen saver program (ST35) when there is an automatically generated screen saver request (YES in ST34) to prevent the screen of the display 40 (CRT 41) from burning.

Here, the relationship between the power saving operation function and the screen saver operation function is that the power saving operation function cannot be executed while the screen saver program is running (YES in ST31). On the other hand, when various application programs including the screen saver program are not activated, the power saving operation function is executed (ST3).
3) During the normal operation (NO in ST30, NO in ST34, ST36), the synchro signal Ssy output (ST37) together with the video signal Svd is cut off (ST32).

Therefore, from the display 40 side, it actually operates as hardware, but if the output sync signal Ssy can be received (YES in ST40) as shown in FIG. In other words, on condition that the signal has been successfully received,
Is displayed (ST41) based on the video signal Svd received from the receiver, and when the content cannot be received (N of ST40)
O) is in a non-display state (ST42).

That is, the display state (ST41) is the same in both the normal operation of the apparatus main body 20 (ST36 in FIG. 5) and the screen saver operation (ST35).
The only difference is the display contents depending on the properties of the received video signal Svd.

Thus, for example, in the case of the merchandise sales registration data processing device (10), the screen saver operation (ST
The video signal Svd in 35) is converted to a message about merchandise sales and merchandise sales registration (for example, “On Sunday, June 2,
"Special discount date", "Commodity AA will arrive on June 2", and "Pause" are often displayed.

[0010]

By the way, in the above-mentioned conventional apparatus, the power saving operation function is executed by the apparatus main body 20 (S in FIG. 5).
T33), the display 40 is in a non-display state (FIG. 6).
ST42), there are the following problems in the purpose of use and specific operation.

For example, a merchandise sales registration data processing device (1
At 0), one or more messages for the store (operator) side during the screen saver operation (for example, "The screen saver operation is in progress due to suspension", "I can return to work immediately", "Return to work" In such a case, turn off the power. "), The display 40 will be in a non-display state if the power saving operation is performed prior to the scroll display.
Operators such as part-timers and arbiters may be confused or difficult to handle, resulting in a significant decrease in work efficiency. In addition, the operator immediately before closing may return home without turning off the power due to mistake.

Further, during the screen saver operation, a message for customer service (for example, “Today's discount service products are AA,
BB ") or the like is displayed on the display 40 (41), it cannot be displayed while the apparatus main body 20 is in the power saving operation.

An object of the present invention is to provide a data processing device capable of displaying a useful message on a display even during a power saving operation of the device main body.

[0014]

According to a first aspect of the present invention, there is provided an apparatus main body having a power saving operation function, and a video signal output from the apparatus main body provided that a synchro signal output from the apparatus main body is received. A data processing device comprising a display capable of displaying the contents based on the synchronization signal when the power saving request is issued to the device main body and the power saving operation can be executed after the forced output is cut off, and A display controller which incorporates the display on condition that the output of the synchro signal is shut off is formed so as to be startable, and an internal display operation is executed based on an internal synchro signal and an internal video signal output by starting up the display controller. , Characterized in that.

In this invention, when there is a power saving request, the apparatus main body forcibly shuts off the synchro signal output to the display and enters a power saving operation. On the other hand, when the output of the synchro signal is cut off, the display based on the video signal from the apparatus main body cannot be displayed. That is, a non-display state occurs. However, since the built-in display controller is activated, the internal sync signal and the internal video signal are output. Therefore, it is possible to cause the display to execute the internal display operation of the content based on the internal sync signal and the internal video signal.

Thus, the apparatus main body can be operated at any time when necessary without being restricted by other conditions such as whether or not the screen saver is operating, and the display is internally displayed even during the power saving operation of the apparatus main body. The vehicle can be driven and a useful message can be displayed. Moreover, if appropriate internal sync signals and internal video signals can be output, it is possible to display desired contents uniquely selected on the display side.

According to a second aspect of the present invention, there is provided an apparatus main body having a power saving operation function, and displays contents based on a video signal output from the apparatus main body on condition that a synchro signal output from the apparatus main body is received. A data processing device comprising a display capable of forcibly shutting down the output of the synchro signal when there is a power saving request on the device main body side; and A synchro signal output cutoff detecting means for detecting whether or not the synchro signal has been output cut off on the display side; and detecting that the synchro signal has been output cutoff. The internal sync signal and the internal video signal can be output when the Provided a display controller for disabling the output signal and the internal video signal, the device was also formed to be the internal display operation of the display in power saving operation of the main body, characterized in that.

In this invention, when there is a power saving request, the forced output cut-off means of the apparatus main body forcibly cuts off the synchro signal output to the display. After that, the post-cutoff power saving operation execution control means executes the power saving operation. On the display side, when the sync signal output cutoff detecting means detects that the sync signal is cut off, the display controller outputs an internal sync signal and an internal video signal. Therefore, the internal display operation can be performed even during the power saving operation of the apparatus main body.

When the power saving operation is canceled on the apparatus main body side, the sync signal output cutoff detecting means on the display side detects that the sync signal has been output. Then, the display controller disables the output of the internal sync signal and the internal video signal. Therefore, the internal display operation is released, and the normal operation or the screen saver operation based on the synchro signal and the video signal from the apparatus main body can be returned.

Therefore, the same operation and effect as those of the first aspect of the invention can be obtained, and furthermore, the power saving request only needs to be generated manually or automatically on the main unit side, so that the handling is simpler.

Further, according to a third aspect of the present invention, the display controller is formed so as to be able to output the internal sync signal and internal video signal for internal display operation based on a program and internal video data stored in a built-in memory. Data processing device.

In this invention, a program capable of outputting an appropriate internal sync signal and internal video signal and internal video data may be stored in a built-in memory accessible by a display controller. Therefore, claim 1
In addition to the same operation and effect as the case of the second aspect of the invention, not only the same display contents as in the case of the screen saver operation but also a special useful message can be internally displayed, so that the applicability can be further expanded. .

Still further, according to a fourth aspect of the present invention, the apparatus main body is a control unit to which data input means for inputting data relating to merchandise sales registration is connected, and the display is adapted to transmit data relating to merchandise sales registration. The data processing device is a display device for displaying and outputting, and the internal video signal is capable of displaying and outputting a message relating to product sales on the display device.

In this invention, the control unit performs data processing of merchandise sales registration based on data (for example, a merchandise code) relating to merchandise sales registration input using the data input means. At this time, data relating to merchandise sales registration based on the synchro signal and the video signal output from the control unit is displayed on the display.

When the customer is interrupted, when the control unit enters, for example, a screen saver operation, the display unit displays the contents based on the video signal to prevent image sticking. Also, when the control unit enters the power saving operation, the display controller outputs an internal video signal capable of displaying a message regarding product sales together with the internal video signal.

Therefore, the same operation and effect as those of the first to third aspects of the present invention can be obtained, and a message (commercial sale) is displayed on the display even during the power saving operation of the control unit when the store is idle. For example, sales promotion,
(A message for improving customer service and operator convenience) can be internally displayed.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the data processing device 10 has a basic configuration as a product sales registration data processing device, and has a forced output cutoff means (21, 22) and a power saving operation after the cutoff on the device main body (control unit) 20 side. Control means (21,
22) and a display (display) 4
Display controller 51 and built-in memory (ROM 5
2) and sync signal output cutoff detecting means (signal monitoring circuit 5)
5), the output of the synchronizing signal Ssy can be forcibly cut off when the power saving request is issued to the apparatus main body 20 and the power saving operation can be executed after the forcible output is cut off.
The display controller 51 which incorporates 0 as a condition of an output cutoff state of the sync signal Ssy is formed so as to be startable, and the internal sync signal ISsy and the internal video signal ISvd output by the start of the display controller 51 are formed.
The internal display operation is formed so as to be executable based on the above.

In this embodiment, the display 4
A connection / separation / recovery means including the first buffer 56, the second buffer 57, and the signal monitoring circuit 55 is provided on the 0 side to perform a display operation as a standard output device of the device body 20, and an internal display operation which is not related to the device body 20. Is formed so as to be able to switch more smoothly and accurately.

Parts common to those in the conventional example (FIG. 4) are denoted by the same reference numerals, and description thereof will be simplified or omitted.

In FIG. 1, an apparatus main body 20 is constructed from a personal computer and forms a control section of a merchandise sales registration data processing apparatus (10). That is, the control unit (20) includes the CPU 21, the ROM 22, the RAM 23, and the interfaces 24 to 28, and can execute data processing such as merchandise sales registration and accounting processing.

Therefore, the control unit (20) includes the keyboard 29 and the display 40 as standard input / output devices.
Is connected. The keyboard 29 forms data input means for inputting data relating to merchandise sales registration, accounting processing, and the like. Further, the control unit (20) stores data (for example, a product code) related to the product sales registration.
, A printer 31 for issuing a receipt print, and an automatic opening unit 32 for a drawer.

The control unit (20) includes a keyboard 29
A power saving operation function (ST12) capable of power saving operation and automatically generated by a power saving request (ST10 in FIG. 2) generated manually by the above key operation or automatically generated based on the length of the program stop period. The screen saver operation function (ST1) that enables the screen saver operation in response to the screen saver request (YES in ST13)
4) is provided.

During the operation of the screen saver (ST1)
In 4), the sync signal Ssy is output (ON) as in the case of the normal operation (ST15) (ST16).
The video signal Svd is also output (ST16), and the content at this time is such that the content (image) for preventing burn-in on the display 40 (41) can be displayed.

The forcible output cutoff means is formed of the ROM 22 and the CPU 21 in which the forcible output cutoff control program is stored, and when there is a power saving request (YE in ST10).
S), the output of the sync signal Ssy is forcibly cut off (OF).
F) (ST11). The video signal Svd is also cut off (OF
F) (ST11).

The after-cutoff power-saving operation execution control means controls the execution of the power-saving operation function after the forcible output cutoff of the sync signal Ssy (ST11). The ROM 22 and the CPU 21 which store the after-cutoff power-saving operation execution control program. And is executed in ST12 of FIG.

In the power saving operation in which the power is reduced, the power consumption can be greatly reduced. However, various programs cannot be started. Naturally, the screen saver program cannot be started (ST14). Also, since the sync signal Ssy is not output, the display 40
(41) is in a non-display state in relation to the synchronization signal Ssy (output cutoff).

Here, on the display 40 side, a first buffer 56, a second buffer 57, a display controller 5
1, an internal display operation unit 50 including a ROM (built-in memory) 52, a RAM 53, and a signal monitoring circuit 55 is built in.

The signal monitoring circuit 55 monitors the sync signal Ssy which is output or cut off from the control unit (20), and outputs the switching signal Ssw and the start signal Sst when the sync signal Ssy is cut off. Is formed. In detail, a synchro signal output cutoff detecting means is formed, and when the detection command signal Sd is output from the display controller 51, it operates to detect whether or not the synchro signal Ssy is output cutoff.

Further, the signal monitoring circuit 55 forms connection disconnection return means together with the first buffer 56 and the second buffer 57. That is, the synchronization signal Ssy is turned off.
(Output cutoff) is detected (YE in ST20 of FIG. 3)
S), the switching signal Ssw is output (for example, H level), the first buffer 56 is turned off (disabled), and the connection state between the control unit (20) and the display [40 (41)] is separated ( Along with ST21), the second buffer 57 is enabled (ST22) and the display controller 51 is enabled (ST23) to connect the display controller 51 to the switch unit 45.

On the other hand, ON (output) of the sync signal Ssy
Is detected (NO in ST20), the switching signal S
The output of sw is cut off (L level) to disable the second buffer 57 (ST24), disconnect the connection state with the display controller 51, enable the first buffer 56 (ST25), and disable the display controller 51. As (ST26), the connection state between the switch unit 45 and the control unit (20) can be restored.

The display controller 51 includes a CPU and outputs a start signal Sst from the signal monitoring circuit 55 (H level).
Then, it is enabled (ST23) and outputs the internal sync signal ISsy and the internal video signal ISvd to the second buffer 57 based on the program and the internal video data stored in the ROM (built-in memory) 52. On the other hand, when disabled (ST26), the output of the internal sync signal Ssy and the internal video signal ISvd is cut off (output disabled).

When the selection switch 59 is turned on, the display controller 51 stores the fact in the RAM 53 and outputs a detection command signal Sd to the signal monitoring circuit 55 to perform a monitoring (detection) operation (for example, H level). I do. When turned off, the output is cut off (L level). When the power of the apparatus main body 20 is turned off at night or the like, even if the power of the display 40 is turned on, the display can be selectively switched so that the display is not performed internally.

The built-in memory (ROM 52) has a program capable of outputting an internal sync signal ISsy similar to the internal video signal ISvd and the sync signal Ssy for displaying a message on sale on the display 40 (CRT 41), and an internal video. Data is stored.

The message relating to the sale of the product includes a warning message for the operator (for example, “Please turn off the power when returning home”) and a guidance message (for example, “The screen saver is in operation due to a pause.”) "I can return to work immediately"), a promotional message for customers (for example, "Today's discount service products are AA and BB"), and a customer service message (for example, "Product CC is June 5 days in stock ","Tomorrow's weather is fine ") and so on. All of the useful messages are not displayed fixedly on the CRT 41 but are displayed in a state (for example, scrolling) in which image sticking can be prevented.

Next, the operation and operation of this embodiment will be described. The selection switch 59 is turned on in advance. That is,
The signal monitoring circuit 55 is set to a monitoring (detectable) state by the detection command signal Sd output from the display controller 51.

The data input means (scanner 30) shown in FIG.
Alternatively, when data (product code) relating to product sales registration is input using the keyboard 29), the control unit (20) searches for a product file (not shown) to obtain product data (product name, unit price) and a sales file. (Not shown). Sales data including product data is stored in the printer 3
In step 1, the information is printed on the receipt paper and displayed on the display 40 (41). The video signal Svd at this time
Includes various guidance.

That is, during the normal operation (ST15 in FIG. 2), the video signal Svd and the synchronizing signal Ssy capable of displaying the sales data and the like are output (ST16). At this time, the sync signal output cut-off detecting means including the signal monitoring circuit 55 on the display 40 side detects that the sync signal Ssy is being output (NO in ST20 of FIG. 3). 57) operates to connect the control unit (20) and the display 40 (45).

That is, the output of the switching signal Ssw is cut off (L level) and the second buffer 57 is disabled (OFF).
(ST24), the first buffer 56 is enabled (ON) (ST25), and the display controller 51 is disabled (OFF) (ST26).

After the merchandise is registered for all of the purchased merchandise of the customer, the operator depresses, for example, a deposit / current total key on the keyboard 29 to declare the end of one transaction. The control unit (20) executes accounting processing including calculation of the total amount. The total amount, change amount, and the like are also displayed on the display [40 (4
1)] and printed on the receipt paper by the printer 31. The drawer is automatically opened by the automatic opening unit 32, and settlement is performed. Thereafter, the issued receipt is handed to the customer.

Considering the case where the customer is interrupted and a preset time has elapsed after the completion of this one transaction, the control unit (20) automatically generates a screen saver request (YES in ST13 of FIG. 5). At the same time, a screen saver program is started (ST14). The set time is counted and managed with reference to a clock circuit not shown in FIG.

Therefore, the video signal Svd is switched for the screen saver operation. In this embodiment, a warning message for the operator is displayed on the display [40 (41)] (for example, "Please turn off the power when returning").
And guidance messages (for example, "I'm on screen saver operation because of a pause", "I can return to work immediately"), and promotional messages for customers (for example, "Today's discount service products are AA, BB
), And a message for customer service (for example, "Commodity CC arrives on June 5", "Tomorrow's weather is fine") and the like can be switched and displayed by scrolling. For customer's product sales registration etc.
When any key is pressed, the screen saver operation (ST14) is stopped and the normal operation (ST15)
Return to

However, after a lapse of a preset time (or manual operation by key operation on the keyboard 29), a power saving request is issued (Y in ST10).
ES). Then, the forced output cutoff means (21, 22)
Forcibly shuts off output of sync signal Ssy (ST11)
I do. The video signal Svd is also forcibly output cut off. That is, both programs are stopped.

Thus, after the output is cut off, the power saving execution control means (21, 22) operates to enter a power saving operation (ST33) for powering down the power supply device incorporated in the control unit (20). Therefore, the power consumption when the control unit (20) is at rest can be significantly reduced.

On the display (40) side, the synchro signal output cutoff detecting means (55) detects that the synchro signal Ssy has been turned off (OFF) (YE in ST20 of FIG. 3).
S), the connection / separation / return means (55, 56, 57) operates, outputs the switching signal Ssw (H level), disables (OFF) the first buffer 56, and turns off the control unit (2).
0) is disconnected (ST21) and the second buffer 5
7 is enabled (ON), the display controller 51 is connected to the switch unit 45 (ST22), and the activation signal Sst is output (H level) to activate (enable) the display controller 51 (ST23).

Then, the display controller 51 is
The internal video signal ISvd and the internal sync signal ISsy based on the program and the video data stored in the (built-in memory) 52 are output to the switch unit 45 via the second buffer 57.

That is, various messages relating to merchandise sales can be internally displayed on the display (41) in the form of a scroll. The message in this embodiment is:
Message during screen saver operation (ST14 in FIG. 2) [alert message for operator (for example,
“Turn off the power on your way home”), guidance messages (eg, “I'm on screen saver because of hibernation”, “I can return to work immediately”), and promotional messages for customers (eg, ,
"Today's discount service products are AA and BB"),
Further, a message for customer service (for example, “Product C
C arrives on June 5 ","Tomorrow's weather is fine "), etc.).

Therefore, since the operator is not in a non-display state even with a part-timer or an albiter, there is no confusion or difficulty in handling. In addition, business can be resumed immediately. On the other hand, it is also possible for the customer to know the special sale item from the internal display of the useful message, and to purchase additional products in the light of the clear weather.

When the power saving operation (ST12 in FIG. 2) is released, the internal display operation on the display (40) is released (ST24 to ST26 in FIG. 3) and the control unit (20).
The connection between the switch and the switch unit 45 is restored, so that the normal operation (ST15 and ST16 in FIG. 2) can be returned.

According to this embodiment, the forced output cut-off means (21, 22) is provided on the apparatus main body (control unit) 20 side.
And a power saving operation execution control means (21, 22) after shutdown, and a display controller 51, a built-in memory (ROM 52), and a synchro signal output shutdown detection means (signal monitoring circuit 55) are provided on the display (display) 40 side. The synchronization signal Ss is provided when the power saving request is
The display controller 51 is formed so that the output of y can be forcibly shut off and the power saving operation can be performed after the forcible output is cut off, and the display controller 51 that incorporates the display 40 on condition that the output of the synchro signal Ssy is shut off is activated. Sync signal I output by the activation of
Since the internal display operation can be executed based on the Ssy and the internal video signal ISvd, the apparatus main body 20 can be operated at any time of power saving whenever necessary without being restricted by other conditions such as whether or not the screen saver operation is being performed. The display 40 can be operated for internal display even during the power saving operation of the apparatus main body 20, and a useful message can be displayed. Moreover, since it is only necessary to manually or automatically generate a power saving request on the main unit 20 side, the handling is simple.

Further, the display controller 51 controls the internal synchronizing signal ISsy for the internal display operation based on the program and the internal video data stored in the internal memory (52).
Also, since the internal video signal ISvd is formed so as to be output, not only the same display contents as during the screen saver operation but also a special useful message can be internally displayed, so that the applicability can be further expanded.

Data input means (29, 30) for the apparatus main body 20 to input data relating to merchandise sales registration.
Is connected to the control unit, and the display 40 is a display for displaying and outputting data relating to merchandise sales registration, and the internal video signal ISvd outputs a message on merchandise sales to the display [40 (41)]. Since it is considered possible, the control unit (2
Display [40 (41)] even during the power saving operation of 0)
, A message related to product sales (a message for improving sales promotion, customer service, and operator convenience) can be internally displayed.

In addition, a message regarding product sales may include a warning message for the operator (for example, “turn off the power when returning home”) or a guidance message (for example, “screen saver operation is in progress due to a pause.” , "I can return to work immediately"), a promotional message for the customer (for example, "Today's discount service products are AA and BB"), and a customer service message (for example, "Product CC is 6 5 / May ","Tomorrow's weather is fine "), etc., so that the operator is not in a non-display state even with a part-timer or an albiter, so there is no confusion or difficulty in handling. In addition, business can be resumed immediately. on the other hand,
For the customer, the special message can be known from the internal display of the useful message, and additional purchases of the product can be made in the clear weather.

Further, since connection / recovery means including the first buffer 56, the second buffer 57 and the signal monitoring circuit 55 are provided on the display 40 side, the display operation as a standard output device of the apparatus main body 20 and the apparatus main body The switching between the internal display operation and the internal display operation that is not related to 20 can be performed more smoothly and accurately.

Furthermore, when the selection switch 59 is provided and the selection switch 59 is turned on, the display controller 51 is stored in the RAM 53 and the detection command signal S for causing the signal monitoring circuit 55 to perform a monitoring (detection) operation.
Since d is formed so as to be output, when the power of the apparatus main body 20 is turned off at night or the like, even if the power of the display 40 is turned on, selection switching can be performed so that the internal display is not performed.

Further, since the merchandise sales registration data processing device is constructed with the device main body 20 as a control unit and the display 40 as a display, the merchandise sales operation efficiency and customer service can be greatly improved.

[0066]

According to the first aspect of the present invention, when a power saving request is issued to the apparatus main body, the synchro signal can be forcibly output cutoff and the power saving operation can be executed after the forced output cutoff, and the display is configured to receive the synchro signal. The display controller is formed so as to be able to be activated under the condition of the output cutoff state, and the internal display operation is performed based on the internal synchronization signal and the internal video signal output by the activation of the display controller. The device main body can be operated at any time when necessary without being restricted by other conditions such as whether or not it is in operation, and the display can be internally displayed while the device main body is in power saving operation, and is useful. Can display messages. Moreover, if appropriate internal sync signals and internal video signals can be output, it is possible to display desired contents uniquely selected on the display side.

According to the second aspect of the present invention, the forced output cutoff means and the post-cutoff power saving operation execution control means are provided on the apparatus main body side, and the synchro signal output cutoff detection means and the display controller are provided on the display side. Since the display is formed so that the internal display operation can be performed even during the power saving operation of the apparatus main body, the same effect as that of the invention of claim 1 can be obtained. It is easier to handle because it only needs to be generated.

According to the third aspect of the present invention, the display controller is formed so as to be capable of outputting an internal sync signal and an internal video signal for internal display operation based on the program and the internal video data stored in the internal memory. Therefore, in addition to the effects similar to those of the first and second aspects of the present invention, not only the same display contents as in the case of the screen saver operation but also special and useful messages can be internally displayed. Sex can be further expanded.

Further, according to the fourth aspect of the present invention, the apparatus main body is a control unit to which data input means for inputting data relating to merchandise sales registration is connected, and the display transmits data relating to merchandise sales registration. In addition to the display device for displaying and outputting, the internal video signal can display and output a message relating to product sales on the display device, so that the same effects as those of the inventions of claims 1 to 3 can be obtained. In addition to being able to play, even during the power saving operation of the control unit when the store is off, the display can internally display a message regarding product sales, for example, which can improve sales promotion, customer service, and operator convenience. Therefore, the product sales registration business efficiency and customer service can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the apparatus main body.

FIG. 3 is a flowchart for explaining the operation of the display.

FIG. 4 is an overall configuration diagram for explaining a conventional example.

FIG. 5 is a flowchart for explaining an operation of the apparatus main body.

FIG. 6 is a flowchart for explaining the operation of the display-side hardware for convenience.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Data processing apparatus 20 Device main body (control part) 21 CPU (forced output cutoff means, power saving operation execution control means after cutoff) 22 ROM (forced output cutoff means, power saving operation execution control means after cutoff) 23 RAM 29 Keyboard (data input) Means) 30 scanner (data input means) 31 printer 40 display (display) 41 CRT 44 interface 45 switch unit 50 internal display operation unit 51 display controller 52 ROM (built-in memory) 53 RAM 55 signal monitoring circuit (detection of sync signal output cutoff) Means) 56 first buffer 57 second buffer 59 selection switch Svd video signal Ssy synchro signal Sd detection command signal Ssw switching signal Sst start signal ISvd internal video signal ISsy internal sync signal

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI G09G 5/00 550 G06F 15/21 310Z (58) Field surveyed (Int.Cl. ⁷ , DB name) G07G 1/01 301 G06F 1/00 G09G 5/00 550 G07D 9/00 451 G09G 1/00

Claims (4)

(57) [Claims] 1. An apparatus having a power saving operation function, and a display capable of displaying contents based on a video signal output from the apparatus main body on condition that a synchro signal output from the apparatus main body is received. In the data processing device, when the power saving request is issued to the device main body, the synchro signal can be forcibly output cutoff and the power saving operation can be performed after the forced output cutoff, and the display is conditioned on the output cutoff state of the synchro signal. A data processing device, wherein a display controller built in the display controller is formed so as to be capable of being activated, and an internal display operation is executable based on an internal synchronization signal and an internal video signal output by the activation of the display controller. 2. An apparatus main body having a power saving operation function, and a display capable of displaying contents based on a video signal output from the apparatus main body on condition that a synchro signal output from the apparatus main body is received. In the data processing device, a forced output cutoff means for forcibly shutting off the output of the synchro signal when a power saving request is issued to the device body side, and after the shutoff for executing the power saving operation after the forced output cutoff of the synchro signal. Power saving operation execution control means, a synchro signal output cutoff detecting means for detecting whether or not the synchro signal is output cut off on the display side; and an internal synchro signal when the synchro signal output is detected to be cut off. And the internal sync signal and internal video when the internal video signal is enabled and detected to be output. No. and a display controller for disabling outputs provided, even during the power saving operation of the device main body was formed to allow the internal display operation of the display, the data processing device, characterized in that. 3. The data according to claim 2, wherein said display controller is configured to output said internal sync signal and internal video signal for internal display operation based on a program and internal video data stored in a built-in memory. Processing equipment. 4. The apparatus main body is a control unit to which data input means for inputting data relating to merchandise sales registration is connected, and the display is a display for displaying and outputting data relating to merchandise sales registration. 4. The data processing apparatus according to claim 1, wherein said internal video signal is capable of displaying and outputting a message relating to product sales on a display.