JP3322945B2 - Display control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is any on the display screen
General-purpose computer or programmable
Gic controller (hereinafter referred to as "PLC")
Figures and groups based on data input from various external devices
Displays digital images composed of rough, numbers, letters, etc.
Display control device for showing, especially digital images
The analog image sent from the video camera is superimposed on
Regarding what to display .

[0002]

2. Description of the Related Art Conventionally, in this type of display, there is a method of assigning the entire range from a highlight level to a black level in an input luminance signal to all display gradations of the display and displaying the same on a display screen. Was common.

[0003]

However, in the above-mentioned method, the contrast of the video image displayed on the display device is reduced, and the display quality is reduced, so that the required image is difficult to see. Was.

The inventor of the present invention has considered such inconveniences, and as a result, under normal use conditions, it is rare that a video signal used up to both low luminance and high luminance areas in a luminance signal is transmitted. The display quality is improved by ignoring the display in such an area and limiting the display to the medium luminance area, and the necessary luminance range can be appropriately changed in the luminance signal. It has been found that only an important video part can be displayed with emphasis.

[0005] The present invention has been made based on the above-described findings, and it is an object of the present invention to provide a video image display state adjusting method capable of displaying a high-contrast video image using a low-resolution display. Aim.

Another object of the present invention is to provide a display state adjusting method capable of changing a display range of an input luminance signal so that a necessary portion can be emphasized and displayed.

[0007]

A display control device according to the present invention.
Communicates with the PLC 12 as illustrated in FIGS. 3 and 4.
Connection via a communication path, and status data recording via this communication path.
Reads the state data MD of the PLC 12 into the storage memory
Processing from the communication unit and information that specifies the operation to be performed
The instruction word W is composed and corresponds to a series of operation contents to be controlled.
For storing event data that can store multiple processing instruction words W
Memory and the processing stored in the event data storage memory.
Of the state data memory.
Control unit for performing a control operation with reference to state data MD
, Digital image data DD, and analog image data A
And D in accordance with the image synthesis data SD, and
The two image data DD and A are displayed on the display screen 32 of A18.
D and a video processing unit 46 capable of superimposing D on each other.
ing. Further, as shown in FIG. 5 and FIG.
The image synthesis data SD is included in the elephant data storage memory.
Number of processing instruction words WV corresponding to the number of images to be superimposed and displayed
Can be installed, while the state data storage memory
A storage area for image synthesis data SD is provided to store event data
When the processing instruction word WV in the memory for use is specified, the specification is performed.
The above described image synthesis data SD of the processing instruction word WV
When the image synthesis data SD in the storage area is updated
The image composite data SD stored in the storage area
Is sent to the video processing unit 46.

Here, the digital image data DD is
Digital images sent from the system controller can be displayed
The analog image data AD is video data.
Enables display of analog images sent from camera 56
Data, and the video processing unit 46
As shown by the solid line in FIG.
Centering on a predetermined gradation position c of the luminance signal input from the
Is displayed on the display 18.
Linearly for the entire display gradation range B
Display the gradation in the range E below the set gradation range D.
To the minimum gradation b in b18, the gradation in the range F
Assign to the maximum gradation a on the display 18.
And features.

[0009]

In the above arrangement, the input luminance signal is expanded such that only the luminance range of the limited range D centered on the display region of the medium luminance is expanded to the entire display gradation range B of the display, and as a result, Is displayed with the contrast of the display image emphasized.

When the set gradation position c of the input luminance signal is changed, the portion of the highlight level or the black level on the display screen is increased or decreased correspondingly, and the luminance of the displayed video image is pseudo-changed. Is done. Also, by increasing or decreasing the width of the display range D, the rate of increase of the display brightness with respect to the display range D is increased or decreased, and the contrast is also changed in a pseudo manner.

[0011]

As described above, according to the present invention, the middle luminance area D of the input luminance signal is changed to the entire display luminance range B on the display.
Because it is configured to be displayed in an enlarged manner, even when an analog video image is displayed using a low-contrast low-resolution display device prepared for digital data display, it is simulated. High contrast is obtained, and the display quality of an image can be improved.

Furthermore, since the displayable range D in the input luminance signal can be arbitrarily changed, a required portion of the image can be emphasized and displayed on the screen.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to FIGS.
A PLC configured specifically for sequence control of the target system is connected, and the analog video image sent from the video camera can be superimposed and displayed on the digital display screen corresponding to the status data handled there. shows the example that was carried to the display control device according to.

The display control device 10 embodying the present invention has a P
It is integrated into the console of the target system together with the LC12, or is itself independently deployed,
It is used to create, operate and display various data for the target system.

The PLC 12 has a function realized as a whole PLC, in which a circuit is unitized for each required function, and each unit is connected in parallel so that it can be added as needed via a bus line. (For example, product number “C2000H” manufactured by OMRON).

[0016]

[Configuration of Display Control Apparatus] A display control apparatus 10 embodying the present invention has a relatively low resolution (such as liquid crystal, EL or plasma) so as to close a large opening 16 provided at the center of the front of a main body case 14. In the present embodiment, a display 18 selected from display means of 16 steps (gradations) is arranged, and a socket 24 to which a plug 22 of a keyboard 20 is detachably attached is provided below the display 18. A reader / writer socket 28 for inputting and outputting data to and from the IC card 26 is provided.

The display control circuit 3 is provided inside the main body case 14.
0 is stored, while the display screen 32 of the display 18 is covered with a transparent touch panel 34 in close contact. The instruction by the pressing on the touch panel 34 is input and analyzed via the touch panel controller 36, and the instruction data can be manually input during the operation of the entire system from which the keyboard 20 is removed.

The basic configuration of the display control circuit 30 is substantially the same as that of a general personal computer, and various memories 50 and 82 including a CPU 40, a ROM 42, and a RAM 44 are connected via a bus line 38, or will be described later in detail. The CPU 40 performs a predetermined arithmetic operation in accordance with a system program stored in the ROM 42, and enables data input from the keyboard 20 via the I / O controller 48.
Various calculation results appropriately stored in the AM 44 are converted into digital image data DD using graphic data GD stored in the graphic memory 50 in advance, and then sent to the video processing unit 46 for display. 1
8 is displayed on the display screen 32.

Further, on the RAM 44, as shown in FIG.
An area capable of storing the state data MD stored in the memory unit of the PLC 12 is provided, and the PLC 1 is connected to the PLC 1 via an algorithm specialized for the circuit configuration of the PLC 12 or a communication controller 52 operated by a general-purpose communication program.
By enabling data exchange between the two computer link units and the serial or parallel communication path 54, the PLC 12 and the display control device 10 hold the same state data MD with a minimum time delay. I have.

As shown in FIG. 4, the video processing section 46 can combine the digital image data DD formed as described above and the analog image data AD captured by using the video camera 56 with each other. FIG.
A window 84 is opened above the digital image 80 as shown in FIG.

That is, analog image data AD sent from a plurality of (three in this embodiment) video cameras 56 arranged at appropriate locations is input to an image selection unit 58,
According to the selection data SS sent from the video control unit 60, analog image data AD from any one unit is selectively extracted. The extracted analog image data AD
Are sequentially converted into digital data by the A / D converter 62, and then stored in real time in the analog image frame memory 66 through the image adjustment unit 64 described later.

The video controller 60 itself has a microprocessor and a memory, and is capable of performing image data processing in parallel with the CPU 40 independently of the CPU 40 based on various data sent from the CPU 40 described above. The analog image data AD stored in the analog image frame memory 66 and the digital image frame memory 6
8 and the digital image data DD stored in the memory 8 at the same time. In the image synthesizing unit 70, the image synthesizing data SD regarding the synthesizing conditions sent from the video control unit 60
, The digital image data DD and the analog image data AD are superimposed, and a display based on the output signal is performed on the display screen 32 of the display 18.

The present invention has a feature in the configuration of the image adjustment unit 64 that can adjust the display state of the analog image 86 superimposed on the digital image 80.

That is, the image adjustment unit 64 uses the conversion table 72 of the video signal digitally converted by the A / D converter 62, the selection unit 74 of the conversion table 72, and the selected conversion table 72. After performing a predetermined conversion process on the input signal, the analog image frame memory 6
And a video signal conversion unit 76 for sending the image signal to the image signal conversion unit 6.

The video signal converter 76 has an 8-bit data input line and a 4-bit data output line, so that the signal level between the highlight level and the black level can be 25.
A video signal to be displayed in six gradations can be adapted to a display 18 whose display function is limited to 16 gradations.

The video signal conversion table 72 converts the luminance signal input to the video signal conversion section 76 into data according to the relationship shown in FIG. And the hue can be changed and adjusted in 16 steps.

That is, the contrast adjustment value is “0”.
At this time, as shown by the dashed line in FIG. 1A, the input luminance signal is converted so as to change linearly in proportion to the gradation change of the input luminance signal. Further, when the adjustment value reaches the maximum value of “15”,
As shown by the solid line, 128 gradations centered on the set gradation c, which is half of the whole gradation range A of the input signal, are proportional to 16 gradations of the whole gradation range B on the display screen 32. Let me assign.

On the other hand, when adjusting the luminance of the display screen 32, when the set value is at the center of the adjustable range as shown by the dashed line in FIG. Is set at the center of the entire gradation range A, and every time the adjustment value increases or decreases by 1, the position of the setting gradation c in the input luminance signal is increased or decreased by the set value as shown by the solid line.

Further, 256 conversion tables 72 are formed corresponding to the combinations of the above-mentioned 16 steps of changes in contrast and luminance, and one set of the conversion tables 72 is provided for each of the three primary colors of RGB. By performing the adjustment, the color tone can be adjusted in 16 steps at the time of color display.

Therefore, when each of the contrast and brightness adjustment values sent manually or automatically based on preset conditions is input to the selection section 74, the corresponding conversion table 72 is selected. In accordance with 72, the video signal conversion unit 76 sequentially converts the gradation of the input video signal.

[0031]

[Structure of processing instruction word] Display control device 1 embodying the present invention
In the case of “0”, furthermore, a base screen 78 such as a table or a graph frame shown in FIG. 5 which does not need to change its display contents, or image data such as a figure which blinks or changes color on the base screen 78 is required. One file number is designated for each display unit to be stored in the graphic memory 50 in advance.

On the other hand, state data MD indicated by a bit device corresponding to the on / off state of a relay or a word device corresponding to a temperature change state, etc., set on the memory unit of the PLC 12 is appropriately displayed on the display controller 10 side. And read them into the RAM 44 in association with each other.

Here, the processing instruction words W illustrated in FIG. 7A are stored in advance in the event data memory 82 in a number corresponding to the number of events to be executed on each base screen 78. The processing instruction word W includes the file number F of the base screen 78 on which the display control operation is to be executed and the base screen 78
An event name N for specifying the operation content to be executed above and reference information r including one or a plurality of data referred to for each execution event are provided as a set. Further, necessary information r such as the address of the state data MD to be referred to or the display coordinates on the display screen 32 on the display 18 can be set in advance.

Therefore, the processing instruction words W1, W2,... Stored in the event data memory 82 as shown in FIG.
Wn is read out intermittently every minute time, and each processing instruction word W
Is executed while referring to the state data MD extracted from the PLC 12 and the graphic data GD on the graphic memory 50 by the reference information r in the processing instruction word W to execute the operation of the PLC 1.
Digital image data DD that changes in response to a change in the content of the bit device or word device on the second side is created, and the display processing of the digital system image 80 corresponding to the control state of the PLC 12 is performed by the video processing unit 46 on the display screen 32. It is done in.

On the other hand, the processing instruction word WT shown in FIG.
Is synchronized with a pressing operation on the touch panel 34,
This allows predetermined data to be written to a predetermined address in the AM 44, and is used when performing manual data input with the keyboard 20 removed. That is, the file number F1 of the base screen 78, the event name N1 starting with, for example, "T" for specifying the operation of the touch panel 34, the input coordinate range X1 on the touch panel 34 for enabling the input operation from the touch panel 34, and the pressing of the touch panel 34 Address A1 to which data is to be written in conjunction with the operation, operation mode M1 for specifying whether the writing of the data is momentary bit writing limited to the pressing time of the touch panel 34 or word writing overwriting the absolute value, and writing to the address Word data to be written or bit position information D1 for writing.

Therefore, if the processing instruction word WT is set on the display screen 32 in advance, the touch panel 34
The processing instruction word WT having the input coordinate range that includes it is retrieved from the actual pressed coordinates for, and the data D1 is written to the specified address A1 according to the operation mode M1 set therein.

Further, the processing instruction word WV shown in FIG.
A window 84 is opened as shown in FIG. 6 on a digital image 80 constructed using the normal processing instruction words W1, W2,... Wn, and an analog image 86 captured from the video camera 56 is displayed in the window 84. It is for.

The data item set for the processing instruction word WV includes a base screen 78 on which superimposed display is performed.
In addition to the file number F1, the event name N2 starting with, for example, "V" for specifying the processing of the video image, the ID number N3 for specifying the set processing instruction word WV, the display state of the analog image 86 is specified. From the display attribute M2 and the transmission color M3, the input channel CH of the video camera 56 for specifying the analog image 86 to be displayed, and the processing instruction word WT for the touch panel 34 set in a portion hidden below the window 84 when the window 84 is opened. Selection data M4 for enabling or disabling the data input of the image data, or various kinds of image combined data SD necessary for combining the analog image data AD and the digital image data DD, such as window setting data. .

[0039]

[Image superimposition procedure using processing instruction word] In this embodiment, the processing instruction word WV for video display is not directly decrypted, but as shown in FIG. 6 and FIG. A data storage area 88 for video control is previously set in the state data MD stored in the RAM 44, and when an ID number is designated therein, the image synthesis data SD of the processing instruction word WV having the corresponding ID number is set. To the data storage area 8
8 automatically read. Thereafter, the updated image combined data SD is sent to the video processing unit 46, and the superimposed display according to the image combined data SD is performed.

That is, the video control data storage area 88 is provided with an entry area for an ID number and image composite data SD.
When the processing instruction word WT1 for the touch panel 34 is used, or when predetermined ID number data D1 is written directly from inside or outside the system, the image synthesis data SD corresponds to the processing instruction word WV1 having the entered ID number N3. Is read for the area of
D is the default value.

The storage area 88 further includes three sets of storage areas for video parameters that define the brightness, contrast, and hue of the video in correspondence with three input channels of four bits each. In such a parameter storage area, a standard value indicating the best image state is set as a default value in advance, and both the above-mentioned image combined data SD and the image parameter together with the change occurrence timing in the image combined data SD and the image parameter Video processing unit 46 corresponding to
Sent to

Further, the storage area 88 is provided with operation areas for window setting data and video parameters. Such an operation area allows the default value set as described above to be manually changed.

FIG. 9 shows a screen for adjusting the display state of the analog image 86 in which the operation switch 90 is set using the processing instruction word WT on the touch panel 34, for example. By turning on or off a specific bit in the video parameter operation area in conjunction with this, the value of the video parameter in the selected channel is counted up or down.

As described above, when the system forcibly rewrites the storage contents of the video control data storage area 88 by using the touch panel 34 manually or when predetermined conditions are satisfied, the rewritten contents are also sequentially changed. As a result, the contrast, brightness, and color of the analog video image 86 in the window 84 are gradually changed and displayed on the display screen 32.

Note that the method of adjusting the display state of the analog image 86 is not limited to the method of indirectly using the processing instruction word WV as described above, and the result of the switch operation is directly used as image data as setting data. It may be sent to the processing unit 46. As a data source of the analog image 86,
Not only the output from the video camera but also the output from a television signal or a VTR can be used.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a basic configuration of the present invention,
(A) shows an example of changing the contrast, and (b) shows an example of changing the luminance.

FIG. 2 is a partially broken perspective view showing a schematic configuration of an external shape.

FIG. 3 is a block diagram illustrating a configuration of a display control circuit.

FIG. 4 is a block diagram illustrating a detailed configuration of a video processing unit in FIG. 3;

FIG. 5 is a diagram illustrating a display procedure using a processing instruction word on a display screen, and shows a state in which a window is closed.

FIG. 6 is a diagram illustrating a display procedure using a processing instruction word on a display screen, showing a procedure for opening a window and superimposing an analog image.

FIGS. 7A and 7B are explanatory diagrams showing a configuration of a processing instruction word particularly used in the present invention, wherein FIG.
(B) is a configuration of a processing instruction word for touch panel operation,
(C) shows the configuration of a processing instruction word for superimposing an analog image.

FIG. 8 is an explanatory diagram showing a specific configuration of video control data in FIGS. 5 and 6;

FIG. 9 is an explanatory diagram showing an example of a video image adjustment screen.

[Explanation of symbols]

 Reference Signs List 10 display control device 18 display 30 display control circuit 32 display screen 34 touch panel 46 video processing unit 56 video camera 58 image selection unit 60 video control unit 64 image adjustment unit 70 image synthesis unit 72 conversion table 74 table selection unit 76 video signal conversion Unit 80 digital image 82 event data memory 84 window 86 analog image 88 video control data storage area 90 operation switch

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H04N 5/57 G09G 5/36 520M 5/66 5/00 555D (56) References JP-A-4-188374 (JP, A) JP-A-63-84526 (JP, A) JP-A-1-130286 (JP, A) JP-A-3-231287 (JP, A) JP-A-4-111001 (JP, A) JP-A-2-277126 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09G 5/00 510 G09G 5/10 G09G 5/14 G09G 5/377 H04N 5/57 H04N 5/66

Claims (1)

(57) [Claims] (1)Connected to PLC (12) via communication path
Through the communication path to the state data storage memory.
A communication unit that reads state data MD on the C (12) side; The processing instruction word W is obtained from the information specifying the operation content to be executed.
Number of processes corresponding to the series of operations to be configured and controlled
An event data storage memory capable of storing the instruction word W; The processing instruction word W stored in the event data storage memory is
Sequentially decodes the state data MD in the state data storage memory
A system control unit that performs a control operation with reference to Digital image data DD and analog image data AD
Are synthesized according to the image synthesis data SD, and the display
Both image data D are displayed on the display screen (32) of (18).
A video processing unit (4
6) and In the event data storage memory, the image composite data
Number of images for which processing instruction word WV including SD should be superimposed and displayed
Can be installed in a number corresponding to In the state data storage memory, the image composite data
Provide a storage area for SD, The processing instruction word WV in the event data storage memory is specified.
Then, the image synthesis data of the specified processing instruction word WV is output.
Data SD in the storage area by the data SD
Images that are updated and stored in the storage area
The image synthesis data SD is sent to the video processing unit (46).
A display control device, The digital image data DD is transmitted from the system control unit.
Data that is sent from the
And The analog image data AD is a video camera (56)
Data sent from the
Further, in the video processing section (46), Input from the video camera (56) Place of luminance signal
A predetermined gradation range D centered on the constant gradation position c is
RecordDisplay (18)In the entire display gradation range B
do itlinear, AndSaid The gradation of the range E below the set gradation range DDisplay
I (18)In the minimum gradation b in the range F
The keyDisplay (18)Divided into the largest gradation a in
A display control device characterized by applying.