JPH09281939A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a picture at a high speed when the next picture is displayed. SOLUTION: A LCD 13 can display characters of, for example, 4 lines, and an operation control section 12 has respectively work memories 1, 2 of 4 lines of characters LCD plotting RAM 12a of 4 lines of characters. Image data for displaying in the present and image data to be a successive display candidate are developed in each area of the work memories 1, 2, only image data developed in the work memory 1 is transferred to the LCD plotting RAM 12a and displayded on a screen of the LCD 13. Also, when a screen of next display candidate is selected, a second image data developed in the work memory 2 is transferred to the LCD plotting RAM 12a and displayed on a screen of the LCD 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for expanding display image data on a memory and displaying it on a screen of an LCD or a CRT, such as a digital copying machine or a copying machine.
The present invention relates to a display device suitable for displaying an operation screen in a facsimile multifunction peripheral or the like.

[0002]

2. Description of the Related Art In a conventional display device, particularly in a digital copying machine, a copying machine / facsimile compound machine or the like, an operation screen is often displayed on an LCD or CRT screen. In such a case, the display image data is expanded on the memory. Further, when the operator selects the next operation screen on the operation screen, the display image data is expanded by overwriting on the memory.

As a conventional example similar to the above technique, there is a "window control device" disclosed in Japanese Patent Laid-Open No. 4-295923. However, this conventional example relates to an event processing method when a plurality of windows are present on one screen, and the contents of the configuration are different from those of the present invention.

[0004]

However, when the display image data is expanded on the memory, a certain expansion time is required. Therefore, when the operator selects the next operation screen on the operation screen, it takes a long time to display the image. The display device is required to have enhanced functions such as creation of the next display screen, reduction of display time, and transition from any screen to a plurality of screens.

An object of the present invention is to provide a display device capable of increasing the speed of displaying the next screen when displaying the next screen.

[0006]

In order to achieve the above object, the display device of the present invention has a first memory for expanding image data for two screens and image data for one screen displayed on the screen. A second memory for expanding
Display control means for displaying the image data on a predetermined screen, the first image data for one screen for the currently displayed screen and the second image data for the next display candidate screen. The image data and the first memory are expanded in the first memory, the first image data expanded in the first memory is transferred to the second memory to be displayed on the screen, and the screen of the next display candidate is selected. In this case, the second image data expanded in the first memory is transferred to the second memory to update the screen display.

Further, the display control means expands the first and second image data in which one screen is composed of a plurality of lines in the first memory, and displays any line displayed on the screen to the next display. When updating the row of the candidate screen, it is preferable to transfer only the image data of the row of the second image data to the second memory.

Further, the display control means, when updating an arbitrary line displayed on the screen with the line of the next display candidate screen, only the image data of the line of the second image data, When updating all rows of the screen of the next display candidate in the state of being transferred to the second memory and the image data of the screen of the next display candidate expanded in the first memory is destroyed, Only the destroyed line may be re-expanded and transferred to the second memory.

The display device of the present invention is also a display device having an LCD operation screen applied to a digital copier / facsimile multifunction machine and a drawing memory for two screens for displaying the LCD operation screen. It is characterized by having a function of creating and displaying a screen according to the event when it occurs and creating a fixed part of the next display candidate screen.

Further, when the display screen switching event occurs, if the screen by this event has already been created as the next display candidate screen in the previous event processing, only the difference from the previously created screen is additionally created. It is good to display.

Further, when a display screen switching event occurs, if the screen generated by this event is different from the one already created as the next display candidate screen in the previous event processing, the next display candidate screen is deleted and a new one is created. It is good to create and display a screen.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a display device according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 10, there is shown an embodiment of the display device of the present invention.

FIG. 1 is a block diagram showing a copying machine to which the display device according to the present embodiment is applied. The display device is mainly composed of the system control unit 8 and each functional unit is connected to the system control unit. The above-mentioned functional units are the line sensor 1, the AGC amplifier 2, the A / D converter 3, the image processing unit 4, the image compression / expansion unit 5, the LD driver 6, the laser diode 7, the scanner control unit 10, and the plotter control. Section 11, operation control section 12, image page memory 9,
The LCD 13 is composed of two drawing RAMs 14.

In the display device of this embodiment constituted by the above-mentioned respective parts, the system control part 8 controls the entire copying machine. The image signal of the original read by the line image sensor 1 such as CCD and the scanner control unit 10 is A
After being amplified to a predetermined amplitude by the GC amplifier 2, the A / D
It is converted into a digital image signal by the converter 3 and applied to the image processing section 4. The image processing unit 4 performs various image processing such as shading correction, MTF correction, and background processing on the input image signal.

In the accumulation mode, the image data is compressed by the image compression / expansion unit 5 and accumulated in the image page memory 9, then read out and output to the LD driver 6 and the laser diode 7. On the other hand, when it is not in the accumulation mode, it is directly output to the LD driver 6 and the laser diode 7. The LD driver 6 and the laser diode 7 form a latent image of an image on a photoreceptor (not shown) under the control of the plotter controller 11.

The copying machine shown in FIG. 1 has, for example, an LCD 13 capable of displaying characters for four lines. This LCD 1
The display operation of 3 is controlled by the operation control unit 12. The image displayed on the LCD 13 is categorized by item, and when the item being displayed is selected by the operator,
The detailed setting screen for that item is displayed. By repeating this operation, the final copying condition is set, and copying is performed based on this condition.

<First Embodiment> FIG. 3 shows a work memory area and an LCD drawing R in the operation control section 12 of FIG.
It is a conceptual diagram which shows the example 1 of a relationship with the image data on AM14. The operation control unit 12, as shown in FIG.
Work memory "1", "2" for lines and LC for 4 lines of characters
It has a D drawing RAM 12a. Image data to be currently displayed and image data of the next display candidate are developed in the areas of the four lines of the work memories “1” and “2”. After that, only the image data to be currently displayed is transferred to the LCD drawing RAM 12a and displayed on the screen of the LCD 13.

FIG. 2 is a flow chart for explaining the display control operation of the copying machine having the components shown in FIG. The above display control operation will be described with reference to FIG. First, L
The image data for four lines to be displayed on the CD screen is stored in the work memory "1" (step S1), and then the image data in the work memory "1" is displayed on the LCD drawing RAM.
The image data for 4 lines of the next display candidate is stored in the work memory “2” (step S3). This allows LCD drawing RAM1
The image data stored in 2a is transferred to the LCD 13 and displayed.

FIG. 4 is a conceptual diagram similar to FIG. 3, showing a second example of the relationship between the work memory area of the operation control section and the image data on the LCD drawing RAM. In FIG.
For example, the second and third lines displayed on the screen of the LCD 13
When the lines are replaced and displayed, as shown in FIG. 4, the second line and the third line drawn in the work memory “1” are displayed on the third line and the second line of the LCD drawing RAM 12a, respectively. This is done by transferring to the area.

FIG. 5 is a conceptual diagram showing a third example of the relationship between the work memory area and the image data on the LCD drawing RAM when only the first line of the next display candidate is displayed. In the display state of FIG. 5, 1 of the image data of the next display candidate
When only the line is displayed, as shown in FIG. 5, the currently displayed first line drawn in the work memory “1” is transferred to the second line of the LCD drawing RAM 12a. Along with this, the first line of the image data of the next display candidate is LC
The data is transferred to the area of the first row of the D drawing RAM 12a.

FIG. 6 shows the case of displaying the next display candidate.
It is a conceptual diagram which shows the example 4 of a relationship between a work memory area and the image data on LCD drawing RAM. As shown in FIG.
When all the image data of the next display candidates are selected, the first to fourth lines of the image data of the next display candidates drawn in the work memory “2” are respectively drawn in the LCD drawing RAM.
12a is transferred to each area on the 1st to 4th lines, and the LCD 13
Will be displayed on the screen. In this case, when the image data of the next display candidate drawn in the work memory "2" is destroyed, only the destroyed line is re-developed and transferred to the LCD drawing RAM 12a.

<Second Embodiment> Various copying conditions are set by the user according to the LCD screen (four-line configuration) controlled by the operation control unit 12. The screen displayed at this time is the two LCD drawing RAs created in advance by the operation control unit 12.
This is done by reflecting any of the contents of M14 on the LCD screen 13.

As for the setting condition, when an item is selected, a more detailed condition setting screen for the item is displayed, and a more detailed condition is selected. The copying conditions are finally set by repeating this. Based on the set conditions, copy image data is output as shown below.

The output signal of the original image read by the line image sensor 1 such as CCD is sent to the AGC amplifier 2.
After being amplified to a predetermined amplitude by, the signal is converted into a digital signal by the AD converter 3 and then input to the image processing unit 4. The image processing unit 4 performs shading correction, MTF correction, background removal processing, etc. on the input digital signal, and the processed digital signal is input to the image compression / decompression unit 5. The image compression / decompression unit 5 compresses the image information of the digital signal, and the processed signal is stored in the image term memory 9. However, when used as a copying machine, raw data is stored as it is. The accumulated image data in this memory is the LD controlled by the plotter control unit 11.
It is output through the driver 6 and the laser diode 7.

Next, the drawing control of the operation screen by the operation control unit 12 will be described. First, the event processing will be described. FIG. 7 is a flowchart showing the processing procedure of an event that occurs on each screen. Normally, it is waiting for an event from the user (S10), but when an arbitrary event is received, the event is analyzed (S11) and the corresponding event processing is performed (S12). When this process ends, the process waits for an event (S10) again.

Next, the event processing handler will be described. FIG. 8 is a conceptual diagram showing the processing processes of the event processing handler in tandem in time series. In FIG.
The necessary processing for the occurred event is fixed on the normal screen. Therefore, the analyzed event is sequentially notified to all the screens currently held, and the necessary processing is performed for each. Here, the event processing handler linked to each screen has a configuration as shown in FIG. The processing contents of each handler are as follows.

1) Screen fixed part creation process (S20)
Is independent of the setting conditions of the previous screen and creates an area unique to that screen. 2) The screen initialization process (S21) creates an area depending on the setting conditions of the previous screen. 3) Various event processes (S22) perform all event processes that need to be monitored on this screen. For example, creating the next screen and other processing. 4) The termination process (S23) performs a process required when the present screen is terminated.

Next, the screen creation procedure and the display procedure will be described. FIG. 9 conceptually shows the screen creation / display and the creation process of the next screen C when the display event of the screen B is received while the screen A is being displayed. 10 is a flowchart showing the procedure shown in FIG. The contents of this event process for creating and displaying the screens B and C in the event process of the current display screen A will be described below with reference to FIGS. 9 and 10.

First, the event processing handler for the screen B is received (S30) and registered. Then, the screen fixation creating process of the registered processing handler is executed (S31 to S3).
4). As a result, the fixed part of the screen B is created. This process is omitted when the screen A is created and is already created as the next display candidate screen. If a different screen D is designated, the screen is deleted and the above process is performed.

Next, the event processing handler for the next display candidate screen C is registered (S36), and the screen fixation creating process is similarly executed (S37). That is, the fixed part of the screen C is created. Finally, the screen initialization process of the screen B is executed (S38), and the area depending on the setting condition of the screen A is created. When the screen creation is completed, drawing on the LCD is performed (S39).

[0031]

As described above, according to the present invention, the first memory for two screens is provided in addition to the second memory for expanding the image data for one screen displayed on the screen.
The first image data for one screen for the currently displayed screen and the second image data for one screen for the next display candidate screen are expanded in the first memory and expanded in the first memory. The first image data is transferred to the second memory to be displayed on the screen, and when the next display candidate screen is selected, the second image data expanded in the first memory is transferred to the second image data. Since the data is transferred to the memory, the speed at which the next screen is displayed can be increased.

Further, when updating an arbitrary line displayed on the screen to the line of the next display candidate screen, only the image data of that line of the second image data is transferred to the second memory. Since the unupdated line currently displayed is not deleted, it is possible to return to the original line or to switch the transfer destination of the second memory when the line is toggled and displayed. As a result, The display can be switched smoothly.

Further, when updating an arbitrary line displayed in the drawing to the line of the next display candidate screen, only the image data of that line of the second image data is transferred to the second memory. When updating all lines of the screen of the next display candidate in the state, when the image data of the screen of the next display candidate expanded in the first memory is destroyed, only the destroyed line is re-created. Since the data is expanded and transferred to the second memory, the speed displayed on the screen can be increased when the next screen is displayed.

Further, according to another invention, by preparing the next display candidate screen in advance, it is possible to shorten the screen creation / display time at the actual display stage.
Further, at the stage of actually displaying the screen prepared as the next display candidate, the entire display time can be shortened by creating / displaying the screen only for the addition.

Further, even when it is possible to shift from one screen to a plurality of screens and a screen different from the screen prepared as the next display candidate screen is displayed, the screen is deleted and the screen can be created and displayed again. I can do it. As a result, it is possible to display a screen including various operation flowcharts.

[Brief description of drawings]

FIG. 1 is a block diagram showing a copying machine to which an embodiment of a display device according to the present invention is applied.

FIG. 2 is a flowchart for explaining display control of the copying machine of FIG.

FIG. 3 is an explanatory diagram showing a work memory area and image data on an LCD drawing RAM in the operation control unit of FIG.

FIG. 4 is an explanatory diagram showing a work memory area and image data on an LCD drawing RAM when a line is replaced and toggle display is performed.

FIG. 5 is an explanatory diagram showing a work memory area and image data on an LCD drawing RAM when only the first line of the next display candidate is displayed.

FIG. 6 is an explanatory diagram showing a work memory area and image data on an LCD drawing RAM when a next display candidate is displayed.

FIG. 7 is a flowchart showing a processing procedure of an event that occurs on each screen.

FIG. 8 is a conceptual diagram showing the processing processes of the event processing handler in a chronological sequence.

FIG. 9 is a diagram conceptually showing the procedure of screen creation / display and next screen C creation processing when a display event of screen B is received while screen A is being displayed.

FIG. 10 is a flowchart showing the procedure shown in FIG.

[Explanation of symbols]

 1 line image sensor (CCD) 2 AGC amplifier 3 A / D converter 4 image processing unit 5 image compression / decompression unit 6 LD driver 7 laser diode 8 system control unit 9 image page memory 10 scanner control unit 11 plotter control unit 12 operation control Part 12a LCD drawing RAM 13 LCD "1", "2" work memory

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G09G 5/36 530 G09G 5/36 530F

Claims (6)

[Claims] 1. A first memory for expanding image data for two screens, a second memory for expanding image data for one screen displayed on the screen, and a predetermined memory for the image data. Display control means for displaying on the screen, and the first image data for one screen for the currently displayed screen and the second image data for one screen for the next display candidate screen are described above. The first image data expanded in the first memory and displayed in the screen by transferring the first image data expanded in the first memory to the second memory, and the next display candidate screen is selected In this case, the display device is characterized in that the display of the screen is updated by transferring the second image data expanded in the first memory to the second memory. 2. The display control means expands the first and second image data in which one screen is composed of a plurality of lines into the first memory, and displays any line displayed on the screen as a next line. The display device according to claim 1, wherein only the image data of the row of the second image data is transferred to the second memory when updating to the row of the display candidate screen. 3. The display control means, when updating an arbitrary line displayed on the screen with a line of the next display candidate screen, only the image data of the line of the second image data is updated. In addition, when all the lines of the screen of the next display candidate are updated while being transferred to the second memory,
When the image data of the next display candidate screen expanded in the first memory is destroyed, only the damaged line is reexpanded and transferred to the second memory. The display device according to claim 2. 4. A display device having an LCD operation screen applied to a digital copier / facsimile multifunction machine and a drawing memory for two screens for displaying it, and when a display screen switching event occurs, the event A display device having a function of creating / displaying a screen and creating a fixed part of a next display candidate screen. 5. When the display screen switching event occurs, if the screen by the event has already been created as the next display candidate screen in the previous event processing, only the difference from the previously created screen is additionally created and displayed. The display device according to claim 4, wherein: 6. When the display screen switching event occurs, if the screen due to the event is different from the one already created as the next display candidate screen in the previous event processing, the next display candidate screen is deleted. The display device according to claim 4, wherein a screen is newly created and displayed.