JPH11212535A - Screen display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent drop-out of display information of a screen in an overlapping part in the case that plural overlapping screens are composited and displayed. SOLUTION: A video signal second synthesizing circuit 18 converts display range data of two screens based on display control data from a display control data selection circuit 20 with respect to a composite video signal g1 from a video signal first compositing circuit 17 so that these display range data do not overlap, and two screens of two video signals are inserted to these converted display range data of two screens to generate composite video data p1, and this data is displayed on a monitor 19 of a video display means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a screen display device capable of simultaneously displaying a plurality of images on the same screen.

[0002]

2. Description of the Related Art In recent years, a screen display device such as a television receiver or a personal computer that can display a plurality of images in a display area of one screen has been put to practical use.

FIG. 8 is a block diagram showing such a conventional screen display device.

In FIG. 8, input terminals 71 and 72 have:
Digital first and second input video signals a2 and a2, respectively.
b2 is derived.

To input terminals 73 and 74, display range data c2 and d2 from the outside indicating the display ranges of the first and second input video signals a2 and b2, respectively, are led, respectively.

The first input video signal a2 and the display range data c2 guided to the input terminals 71 and 73 are supplied to a first video signal processing circuit 75. The second input video signal b2 guided to the input terminals 72 and 74 and the display range data d2
Is supplied to the second video signal processing circuit 76.

The first video signal processing circuit 75 performs digital signal processing on the supplied first input video signal a2 and the display range data c2 to generate a first video signal e2 including the display range data to generate a video. The signal is supplied to the signal synthesis circuit 77. The second video signal processing circuit 76 performs digital signal processing on the supplied second input video signal b2 and display range data d2 to create a second video signal f2 including the display range data, and generates a video signal synthesis circuit. To 77. The video signal synthesizing circuit 77 supplies the supplied first and second video signals e2 and f2.
Are set on the basis of the display range data included in each of them, and are combined on one screen to be displayed as a video signal g2 on the monitor 78 of the video display means.

In such a screen display device, display range data c2 and d2 are externally applied to the first and second input video signals a2 and b2, and the first and second video signal processing circuits are provided for each image. By 75 and 76,
After obtaining video signals e2 and f2 of two images including information to be displayed at a predetermined position, a video signal g2 obtained as a result of synthesis by the video signal synthesis circuit 77 is output to the monitor 78.

Since the video signals e2 and f2 of the two images are independently processed and are displayed regardless of their display positions, for example, when a finite display area is equally divided into a plurality of screens, All the images are displayed, but if the ratio of one screen to the entire display area is larger than that at the time of equal division, some of the adjacent screens overlap.

FIG. 9 is an explanatory diagram showing such overlap between adjacent screens. FIG. 9A shows a screen based on the first and second input video signals a2 and b2, and FIG.
2 shows two screens synthesized by the video signal synthesis circuit 77.

As shown in FIG. 9A, the characters "Patent deadline" and "September 26" are described on the first screen 91 based on the first input video signal a2. On the second screen 92 based on the input video signal a2, "Caution !!"
The text "27th is the work day" is described.

The two screens are connected to the video signal synthesizing circuit 7.
9, the second screen 92 overlaps the first screen 91 as shown in FIG. 9B, and some of the characters on the first screen 91 are missing, as shown in FIG. It seems that the words "Deadline !!!!" and "September 27 is the work day" are written.

As described above, in such a conventional screen display device, when two screens are combined,
Since only one of the screen information items can be selected in a portion where the screens overlap, there is a case where one of the screen information portions is missing and the information is erroneously recognized.

[0014]

In the conventional screen display device described above, when a plurality of screens are combined and displayed in a finite display area, only one of the screen information can be selected at a portion where the screens overlap. As a result, there was a case where one of the screen information was partially lost, and the information was erroneously recognized.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a screen display device which eliminates the above-mentioned problems and can prevent loss of screen information when a plurality of screens are combined and displayed.

[0016]

According to the present invention, when displaying a plurality of screens overlapping in a predetermined display range, the shapes of the plurality of screens are changed so that the screens do not overlap each other. It is characterized by.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of a multi-screen display device according to the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.

In FIG. 1, input terminals 11 and 12 have
Digital first and second input video signals a1,
b1 is derived.

To the input terminals 13 and 14, external display range data c1 and d1 indicating the display ranges of the first and second input video signals a1 and b1, respectively, are led.

The first input video signal a1 and the display range data c1 guided to the input terminals 11 and 13 are supplied to a first video signal processing circuit 15. Second input video signal b1 and display range data d1 guided to input terminals 12 and 14
Is supplied to the second video signal processing circuit 16.

The first video signal processing circuit 15 performs digital signal processing on the supplied first input video signal a1 and the display range data c1 to generate a first video signal e1 including the display range data to generate a video. The signal is supplied to the first combining circuit 17. The second video signal processing circuit 16 performs digital signal processing on the supplied second input video signal b1 and the display range data d1 to generate a second video signal f1 including the display range data, and generates the first video signal f1. It is supplied to the synthesis circuit 17. The video signal first synthesizing circuit 17 synthesizes the supplied first and second video signals e1 and f1 into one synthesized video signal g1 and supplies it to the video signal second synthesizing circuit 18.

On the other hand, input terminals 21, 22, 23, 24,
25 includes first to fifth display control data h1, i1,
j1, k1, and m1 are derived. The first display control data h1 is control information for deforming only one of the overlapped screens, the second display control data i1 is control information for deforming both of the overlapped screens, and the third display control data j1 is The control information to be compressed at an arbitrary reduction ratio only in the vertical direction is obtained for a region surrounded by a horizontal side of an area overlapping between adjacent screens A and B and a vertical side of the image A or B. , The fourth display control data k1 is arbitrarily set only in the horizontal direction with respect to the area surrounded by one side in the vertical direction of the area overlapping between the adjacent screens A and B and one side in the horizontal direction of the picture A or B. Becomes the control information to be compressed at the reduction rate of the fifth display control data m1.
With respect to an area overlapping between adjacent screens, control information for horizontally and vertically compressing the area at a reduction ratio similar to the aspect ratio thereof and displaying the reduced screen in an area of the display area that does not overlap with another screen. Has become.

The input terminal 26 is supplied with a selection signal n1 for selecting control information set by a key input or the like.

The display control data selection circuit 20 receives the first to fifth display control data h1, i1 from the input terminals 21, 22, 23, 24, 25 based on the selection signal n1 supplied from the input terminal 26. , J1, k1, and m1 are selected and supplied to the video signal second synthesizing circuit 18.

The video signal second synthesizing circuit 18 displays display position information and image data pertaining to the two screens with respect to the synthesized video signal g1 from the video signal first synthesizing circuit 17.
The display position and the address are respectively stored in a memory having a one-to-one correspondence, and the display information is flagged as being displayed or not. Here, the video signal second synthesizing circuit 18
Extracts a portion where both flags are duplicated, detects a portion where the image is duplicated, deletes one display flag once for a portion where the image is duplicated, and displays the display control data from the display control data selection circuit 20. , The display range data of the two screens is converted so as not to overlap, the same shape and the same number of display flags as the compressed screens are set in the corresponding flag areas, and the video data compressed in a predetermined memory is set. Is stored. Thereafter, each image is mapped to the output side memory according to the state of the flag, and the video data p1 is output to the monitor 19 of the video display means according to the pixel clock from the head of the synchronization signal. Thereby, the video signal second
The synthesizing circuit 18 does not overlap the display range data of the two screens with the synthesized video signal g1 from the video signal first synthesizing circuit 17 based on the display control data from the display control data selection circuit 20. Converted, this converted 2
Video data p synthesized by inserting two screens based on the two video signals into the display range data of one screen
1 is created and displayed on the monitor 19 of the video display means.

With such a configuration, the first and second video signal processing circuits 15 and 16 add display range data of a plurality of screens respectively corresponding to a plurality of input video signals and generate a plurality of video signals respectively. A plurality of video signal processing circuits to be output are provided, and the first video signal combining circuit 17 and the second video signal combining circuit 18 display display data of a plurality of screens included in a plurality of video signals from the plurality of video signal processing circuits. Detecting overlapping areas, converting the display range data of the plurality of screens so as not to overlap based on the area detection result, and using the plurality of video signals based on the converted display range data of the plurality of screens. This is a synthesizing circuit for synthesizing a plurality of screens into one screen and displaying it on the video display means.

FIG. 2 is a flowchart showing the operation of the video signal second synthesizing circuit 18 of FIG.

In FIG. 2, first, the video signal second synthesizing circuit 18 fetches the display range from the synthesized video signal g1 from the video signal first synthesizing circuit 17 to be input in step S1, and the video signals of the two screens A signal that becomes active at the timing to be displayed is generated. Next, in step S2, the video signal second synthesizing circuit 18 fetches the video images of the two screens into the memory area, and at the same time, fetches a signal that becomes active when it is the display area into the memory area and flags it. Next, the video signal
In step S3, the synthesizing circuit 18 detects a portion where the flag overlaps with respect to the entire area, and in step S4, erases the flag corresponding to the portion where the flag of one screen overlaps and the flag corresponding thereto and simultaneously erases the flag. Compress screen data. Next, the video signal second synthesizing circuit 18
In step S5, a flag is set in an area where a flag is not set in the display area with respect to the compressed screen according to the size of the screen. Thereafter, the video signal second synthesizing circuit 18 stores the data obtained by compressing the video signals of the two screens in the newly flagged area in step S6, and in step S7, stores each video in the flag. Map to the output side memory according to the state,
In step S8, the data mapped in the memory is output as video data p1 according to the clock.

FIG. 3 is an explanatory diagram showing the operation when the display control data selection circuit 20 of the multi-screen display device of FIG. 1 selects the first display control data h1, and FIG. 2 shows a screen before deformation by the combining circuit 18 and FIG.
FIG. 3B shows a screen after being transformed by the video signal second combining circuit 18.

As shown in FIG. 3A, in the full-screen display area 31 before deformation by the video signal second synthesizing circuit 18, the lower left of the screen (small screen) 32 and the upper right of the screen (small screen) 33 are located. Overlapping. When the display control data selection circuit 20 selects the first display control data h1, FIG.
As shown in (b), the lower left corner of one of the screens 32 is curved at a portion where the screens 32 and 33 overlap with each other and the periphery thereof.

With such an operation, the video signal first synthesizing circuit 17 and the video signal second synthesizing circuit 18 overlap the display range data when converting the display range data of a plurality of screens so as not to overlap. Of the two screens,
An area in which only one screen overlaps is compressed at an arbitrary reduction ratio in the horizontal or vertical direction.

FIG. 4 is an explanatory diagram showing an operation when the display control data selection circuit 20 of the multi-screen display device of FIG. 1 selects the second display control data i1, and FIG. FIG. 4 shows a screen before deformation by the two-synthesis circuit 18.
FIG. 3B shows a screen after being transformed by the video signal second combining circuit 18.

As shown in FIG. 4A, in the full-screen display area 34 before deformation by the video signal first synthesizing circuit 18, the lower left of the screen 35 and the upper right of the screen 36 overlap.
The display control data selection circuit 20 outputs the second display control data i
When 1 is selected, as shown in FIG. 4 (b), the corner of the overlapped portion between the two screens 35 and 36 is curved and deformed at and around the overlapped portion of the screens 35 and 36. I have.

With such an operation, the video signal first synthesizing circuit 17 and the video signal second synthesizing circuit 18 overlap the display range data when converting the display range data of a plurality of screens so as not to overlap. It is characterized in that both of the two screens are compressed at an arbitrary reduction ratio in the horizontal or vertical direction with respect to the overlapping area.

FIG. 5 is an explanatory diagram showing the operation when the display control data selection circuit 20 of the multi-screen display device of FIG. 1 selects the third display control data j1, and FIG. FIG. 5 shows a screen before deformation by the two-synthesis circuit 18 and FIG.
FIG. 3B shows a screen after being transformed by the video signal second combining circuit 18.

As shown in FIG. 5A, in the full screen display area 37 before deformation by the video signal first synthesizing circuit 18, the lower right of the relatively large screen 38 and the upper left of the relatively small screen 39 overlap. ing. The screen 38 has vertical writing
The characters "again" and the character "is typhoon landing?" Are displayed, but the characters "?" Are hidden by the screen 39. When the display control data selection circuit 20 selects the third display control data j1, as shown in FIG. 5B, one side in the horizontal direction in the area where the screens 38 and 39 overlap, and one screen Vertical compression is performed on a rectangular area 40 surrounded by one side in the vertical direction of 38 (a screen containing information that is continuous in the vertical direction). This allows
"Typhoon Landing?" Is completely displayed. The third display control data j1 is suitable when characters are written vertically.

With such an operation, the video signal first synthesizing circuit 17 and the video signal second synthesizing circuit 18 can convert the display range data of a plurality of screens so that the adjacent screens A and B are not overlapped. A region surrounded by one side in the horizontal direction of a region overlapping between them and one side in the vertical direction of the image A or B is compressed at an arbitrary reduction ratio only in the vertical direction.

FIG. 6 is an explanatory diagram showing an operation when the display control data selection circuit 20 of the multi-screen display device of FIG. 1 selects the fourth display control data k1, and FIG. FIG. 6 shows a screen before deformation by the 2 synthesis circuit 18 and FIG.
FIG. 3B shows a screen after being transformed by the video signal second combining circuit 18.

As shown in FIG. 6A, in the full-screen display area 41 before the transformation by the video signal second synthesizing circuit 18, the lower right of the relatively large screen 42 and the upper left of the relatively small screen 43 overlap. ing. The screen 42 has horizontal writing
The character “Sato“ quit monka ”” is displayed, but the character “monka” is hidden by the screen 43. When the display control data selection circuit 20 selects the third display control data j1, Is a screen 42, as shown in FIG.
Vertical compression is performed on a rectangular area 44 surrounded by one side in the vertical direction in the overlapping area of 43 and one side in the horizontal direction of one screen 43 (a screen containing information continuous in the horizontal direction). . As a result, the character “Sato“ quit monka ”” is completely displayed.The fourth display control data k1 is suitable when the character is written horizontally.

With such an operation, the video signal first synthesizing circuit 17 and the video signal second synthesizing circuit 18 can convert the display range data of a plurality of screens so that the adjacent screens A and B are not overlapped. A region surrounded by one side in the vertical direction of a region overlapping with the other and one side in the horizontal direction of the image A or B is compressed at an arbitrary reduction ratio only in the horizontal direction.

FIG. 7 is an explanatory diagram showing the operation when the display control data selection circuit 20 of the multi-screen display device of FIG. 1 selects the fifth display control data m1, and FIG. FIG. 7 shows a screen before deformation by the 2 synthesis circuit 18.
FIG. 3B shows a screen after being transformed by the video signal second combining circuit 18.

As shown in FIG. 7A, in the full screen display area 51 before deformation by the video signal first synthesizing circuit 18, the lower right of the relatively large screen 52 and the upper left of the relatively small screen 53 overlap. ing. The screen 52 has horizontal writing
The message "Can Japan beat Korea?"
The character “?” Is hidden by the screen 53. On the screen 53, horizontal writing, "Aim!", "France World Cup"
Is displayed. When the display control data selection circuit 20 selects the third display control data j1, FIG.
As shown in (b), the area overlapping between adjacent screens of the screens 52 and 53 is compressed in the horizontal and vertical directions at a reduction ratio similar to the aspect ratio thereof, and is combined with other screens in the full screen display area 51. The reduced screen 54 is displayed in a non-overlapping area. As a result, the character “?” Is displayed on the screen 54.

With such an operation, the video signal first synthesizing circuit 17 and the video signal second synthesizing circuit 18, when converting the display range data of a plurality of screens so as not to overlap, have an aspect ratio similar to the aspect ratio. The image is compressed in the horizontal and vertical directions at a reduction ratio, and the reduced screen is displayed in an area of the display area that does not overlap with another screen.

As described above, according to such an embodiment of the present invention, it is possible to prevent loss of screen information when a plurality of screens are combined and displayed, and to prevent erroneous recognition of information.

In the embodiment of the present invention shown in FIG.
Although two screens based on the first and second input video signals a1 and b1 are combined and displayed, the number of combined screens may be more than two. Further, when the combining circuit by the video signal first combining circuit 17 and the video signal second combining circuit 18 converts the display range data of a plurality of screens so as not to overlap, an area where the display range data overlaps and its surroundings May be transformed into an arbitrary shape. Further, various types of video display means such as a cathode ray tube and a liquid crystal panel can be applied.

[0047]

According to the present invention, it is possible to prevent a loss of screen information when a plurality of screens are combined and displayed, and to prevent erroneous recognition of information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-screen display device according to the present invention.

FIG. 2 is a flowchart illustrating the operation of the multi-screen display device of FIG.

FIG. 3 is an explanatory diagram showing an operation when the display control data selection circuit of the embodiment of FIG. 1 selects first display control data;

FIG. 4 is an explanatory diagram showing an operation when the display control data selection circuit of the embodiment of FIG. 1 selects the second display control data;

FIG. 5 is an explanatory diagram showing an operation when the display control data selection circuit according to the embodiment of FIG. 1 selects third display control data;

FIG. 6 is an explanatory diagram showing an operation when the display control data selection circuit according to the embodiment of FIG. 1 selects the fourth display control data;

FIG. 7 is an explanatory diagram showing an operation when the display control data selection circuit according to the embodiment of FIG. 1 selects fifth display control data;

FIG. 8 is a block diagram showing a conventional multi-screen display device.

FIG. 9 is an explanatory diagram showing the operation of the multi-screen display device in FIG.

[Explanation of symbols]

 15, 16 video signal processing circuit 17 video signal first synthesis circuit 18 video signal second synthesis circuit 19 monitor 20 display control data selection circuit

Claims (10)

[Claims] 1. A screen display device, wherein when displaying a plurality of screens within a predetermined display range, the shapes of the plurality of screens are deformed so that the screens do not overlap each other. 2. A screen display device, wherein when displaying a plurality of screens within a predetermined display range, a part of the screen is compressed so that the screens do not overlap each other. 3. When displaying a plurality of screens within a predetermined display range, dividing a part of the screen so that the screens do not overlap each other and displaying the screen at another position within the display range. Characteristic screen display device. 4. A plurality of video signal processing circuits for adding display range data of a plurality of screens respectively corresponding to a plurality of input video signals and outputting each as a plurality of video signals, and a plurality of video signal processing circuits from the plurality of video signal processing circuits. Detects an area where the display range data of a plurality of screens included in the video signal overlap, and converts the display range data of the plurality of screens so as not to overlap based on the area detection result. A combination circuit for combining a plurality of screens based on the plurality of video signals into one screen based on display range data of the screen and displaying the combined screen on a video display unit. 5. When the combining circuit converts display range data of a plurality of screens so as not to overlap, an area where the display range data overlaps and its periphery are deformed into an arbitrary shape. Item 5. The screen display device according to Item 4. 6. In a case where the synthesis circuit converts display range data of a plurality of screens so as not to overlap each other, the two or more screens in which the display range data overlaps are arranged in a horizontal or vertical direction with respect to an area where only one of the screens overlaps. 5. The screen display device according to claim 4, wherein the image is compressed at an arbitrary reduction ratio. 7. When the combining circuit converts display range data of a plurality of screens so as not to overlap each other, an arbitrary reduction in a horizontal or vertical direction with respect to a region where both of the two screens where the display range data overlaps is overlapped. 5. The screen display device according to claim 4, wherein compression is performed at a rate. 8. When the synthesizing circuit converts display range data of a plurality of screens so as not to overlap each other, one side in a horizontal direction of an overlapping area between adjacent screens A and B and the image A or B 5. The screen display device according to claim 4, wherein a region surrounded by one side in the vertical direction is compressed at an arbitrary reduction ratio only in the vertical direction. 9. When the combining circuit converts display range data of a plurality of screens so as not to overlap, one side in a vertical direction of an overlapping area between adjacent screens A and B and the image A or B 5. The screen display device according to claim 4, wherein a region surrounded by one side in the horizontal direction is compressed at an arbitrary reduction ratio only in the horizontal direction. 10. An area overlapping between adjacent screens is compressed in the horizontal and vertical directions at a reduction ratio similar to the aspect ratio thereof, and the reduced screen is displayed in an area of the display area that does not overlap with another screen. 5. The screen display device according to claim 4, wherein: