JPH03140072A - Picture display device - Google Patents

Abstract

PURPOSE:To improve the pattern utilizing efficiency by setting a laterally longer aspect ratio to a pattern when pictures with different aspect ratio onto one screen selectively and displaying a small slave picture aside a main picture when displaying a picture of an aspect ratio not laterally longer. CONSTITUTION:The device is provided with a main video signal input terminal 1, a time axis compression circuit 2, switches 3-5, prescribed video signal input terminals 6-8, small pattern processing circuits 9-11, and a video signal output terminal 12. When a picture with an aspect ratio of 4:3 like the NTSC system and a picture with an aspect ratio of 16:9 like the HDTV system of laterally longer size are displayed selectively onto the screen of the aspect ratio of the HDTV system, the picture of the HDTV system is displayed as it is on the pattern and the time axis of picture of the NTSC system is compressed and displayed, e.g. to the left side of the screen and other small picture is displayed to the area at the right side of the screen. Thus, the wide screen is effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applicable to images having a 7 aspect ratio of 4 to 3 such as the NTSC system, and a horizontally long 1 aspect ratio such as the IIDTV system.
The present invention relates to an image display bag r suitable for displaying images having an aspect ratio of 6:9 on a common screen.

[Conventional technology]

Figure 7 shows a screen with an NTSC aspect ratio.
This shows a conventional example of displaying an IIDTV system image.

The NTSC screen has an aspect ratio of 4:3, as shown in FIG. 7(a). Therefore, when displaying an IIDTV image with an aspect ratio of 16:9 on this screen, the horizontal length of one image should correspond to the horizontal length of the screen, as shown in Figure (b). , a no-signal portion is formed in the vertically surplus upper and lower regions.

Alternatively, as shown in FIG. 7(c), II D
The vertical direction of the TV system image corresponds to the vertical length of the screen, and the images near the left and right ends of the IIDTV system are cut off.

On the other hand, FIG. 8 shows a conventional example in which an NTSC image is displayed on a screen having an ItDTV aspect ratio.

The screen of the II D TV system has an aspect ratio of 16:9, as shown in FIG. 8(b). When displaying an NTSC image with an aspect ratio of 4:3 on this screen, as shown in FIG. 8(a), ! Either the vertical direction of the NTSC image corresponds to the vertical direction of the screen, and no-signal areas are formed on the left and right sides of the screen, or the horizontal direction of the NTSC image is Draw the length +
FII, and the image near the top and bottom edges of the NTSC system was cut off.

[Problems to be Solved by the Invention] However, as shown in FIG. 7(b), in the method of forming no-signal areas at the top and bottom, one image becomes small even though the screen has a wide aspect ratio. Gives a cramped and cramped feel.

Furthermore, as shown in FIG. 8(a), in the method of forming no-signal areas on the left and right sides, 11181/4 of the width of the five screens is wasted, making the screen look poor.

Furthermore, in the methods shown in FIGS. 7(c) and 8(c), the edges of one image are cut off, making it difficult to see.

The present invention was made in view of this situation, and it is an object of the present invention to enable images with different aspect ratios to be viewed without cutting off the edges, and to make more effective use of the screen. .

[Means for Solving the Problem]) In the image display device of the present invention, one of the image with the first aspect ratio and the image with the second aspect ratio, which is laterally longer than the image with the first aspect ratio, is selectively displayed. an image display device for displaying an image on a screen having a second aspect ratio, the device comprising: a first means for compressing the time axis of a video signal of an image having a first aspect ratio; a second means for processing a predetermined video signal so that it can be displayed in a small area generated by compression of the first means;
in a small area next to the image displayed on the screen.

a third means for combining the outputs of the first means and the second means so that the image output from the second means is displayed;
and fourth means for selecting and displaying either the video signal of the image having the second aspect ratio or the output of the third means on the screen.

[Effect]

In the above-mentioned image display device, for example, an NTSC image having a first aspect ratio and an IIDTV image having a second aspect ratio are selectively displayed on a screen having an IIDTV aspect ratio.

+1DTV system images are displayed on the screen as they are.

The time axis of an NTSC image is compressed, and another small image is displayed in an area formed on the right side of the 0th screen, which is displayed on the left side of the 5th screen, for example.

Therefore, not only can images of any aspect ratio be viewed appropriately, but also the entire wide screen can be used effectively.

〔Example〕

FIG. 1 is a block diagram showing the implementation of an embodiment of the image display device of the present invention.

In the figure, 1 is a terminal to which a video signal is input from a circuit not shown, and 2 is a terminal 11 when the video signal is supplied from the terminal l.
The first means for compressing the 0-axis is the 11j-axis compression circuit. 3 is a switch, f input from terminal 1
This is a switch serving as a fourth means that selects the signal inputted from the switch 4 serving as the third means and outputting the selected signal to the terminal 12.

6 to 8 are terminals into which predetermined video signals are input.

Reference numerals 9 to 11 designate small screen processing circuits as second means for processing signals inputted from terminals 6 to 8 so that they can be displayed on both small surfaces. One of the outputs of the small double-sided processing circuits N9 to N11 is selected by the switch 5 and supplied to the switch 4.

Next, the operation will be explained with reference to FIG.

When video No. 18 of the IIDTV system is input to terminal 1.

Switch 3 is switched to the upper side in FIG. As a result, the video signal input from [terminal] is switched to switch 3.
, are outputted to a circuit (not shown) via the terminal 12 and displayed on eight predetermined screens as they are. This Wi side is II D T
Since the aspect ratio of the V format is set to 16:9, the original image is displayed as is.

On the other hand, when an NTSC video (number i) is input to terminal 1, switch 3 is switched to the lower side in the figure.

A video signal inputted from a terminal 1 is inputted to a time axis compression circuit 2, and the time axis of the luminance signal is compressed. A specific method thereof is disclosed in, for example, Japanese Patent Application Laid-Open No. 168793.

As a result, the portion of the luminance signal A in the horizontal scanning line shown in FIG. 2(a), for example, is compressed as shown in the portion of the luminance signal in FIG. 2(b).

On the other hand, the video fffi input from a circuit (not shown) to terminals 6 to 8 is processed by small screen processing circuits 9 to 11,
It is converted to a video signal for small screens. The outputs of the small screen processing circuits 9 to 11 are input to the switch 5. Switch 5 connects the first 1/3 of one field to the 81st-order 1/3 section point.
3, and the last 1/3 interval point C,
Can be switched sequentially.

Small screen processing is a process in which the timing and time of signal output corresponds to the inserted part in the horizontal direction, and interpolation and thinning of scanning lines to make the inserted part correspond to the inserted part in the vertical direction. 5 is disclosed, for example, in the magazine "Television Technology J 34 (8) (August 1986 issue), pages 39 to 46, and 35 (2) (February 1987 issue), pages 47 to 54. ing.

The switch 4 connects the small screen processing circuits 9 to 1 from the switch 5.
When the brightness signal B for one of the small screens is input, the switch is switched to the lower side in the figure, and at other timings, the switch is switched to the upper side. As a result, as shown in FIG. 2(b).

The brightness signal B of the small screen is synthesized after the time-axis compressed brightness signal A. This signal is outputted from the terminal 12 via the switch 3 to a circuit (not shown).

As a result, the display on one screen becomes as shown in FIG. 3(a).

That is, the NTSC main image A is displayed on the entire left side of the screen with an aspect ratio of 16:9 with an aspect ratio of 4:3 (12:9). This aspect ratio is NTS
Since this is the original method of the C method, the main image A is not horizontally reduced or a part of it is cut.

Further, on the right side of the main image A, small screen sub-images B to B corresponding to the small screen processing circuits 9 to 11 are displayed at the center or bottom of the screen cloth, respectively.

The aspect ratio of this small screen is also 4:3, so NTS
If the video signal is of the C format, this small screen image will also be a natural image.

In the above embodiment, as shown in FIG. 4(a), one main electron gun 21 is provided, so that one screen 22 is provided.
This is for scanning the entire area.

As shown in FIG. 4B, the same operation can be performed even when three sub-electron guns 23 to 25 are provided in addition to the main electron gun 21. In this case, images B1 to B are displayed independently by the electron guns 23 to 25, respectively. Therefore, in this case.

These electron guns 21, 23 to 25 constitute a third means for synthesizing images.

FIG. 5 is a perspective view showing the configuration of an embodiment of a monitor device to which the image display device of the present invention is applied.

A screen 22 is arranged on the front of the housing 31.

A door 32 having a window 33 is rotatably provided on the right side thereof. The door 32 can be accommodated in a housing portion 34 formed on the right side of the housing 31.

When viewing +10TV images, the door 32 is accommodated in the accommodation section 34. This exposes the entire screen 22.

On the other hand, when looking at an NTSC image, the door 32 is pulled out from the accommodating portion 34 and rotated and placed so as to cover a portion of the right side of one screen 22. As a result, door 3 on screen 22
A normal main image can be seen on the left side where B 2 is not facing, and a sub-image B□ can be seen through the window 33.

If a portion where nine images B, , B, are displayed when image n1 is displayed is in a heat signal state, this portion is covered by the door 32, so that it is prevented from becoming unsightly.

Note that if the position of the window 33 is made movable, any one of the sub-images B to eight can be viewed with the door 32 closed.

Of course, when viewing NTSC images, the door 32 is
4 and three sub-images B along with the main image.

It is also possible to view all of B1 to B1 at the same time.

In addition, instead of the window 33, a liquid crystal display is installed,
In addition, a sub-image may be displayed.

In the above, an image with an aspect ratio of 16:9 and an image with an aspect ratio of 4:3
For example, as shown in FIG. 3(b), an image with an aspect ratio of 5:3 and an image with an aspect ratio of 4:3 are selected. If you want to display the image on the screen, set the screen to a 5:3 aspect ratio. And on the left side is the main Ui with a 4:3 aspect ratio.
, and divide the right side into four, four sub-images B1 to B can be created without changing the aspect ratio.
4 can be placed.

Further, 1, for example, MA C (F' as the number shown in FIG. 6(a), luminance signal "; 3r (Y-A) and color (No.
When displaying signals in which C-A,) are time-division multiplexed using one electron gun, the luminance signal (Y-A) and the color 48
The time axis of each image (C-A) is compressed, and the luminance signal (Y-B) and color signal (C-B) of the sub-image are inserted into the resulting blank space.

Also,? ! [If the images output to several small screens are limited to frame-by-frame display of still images, only one processing system is required for small screen display.

Some of the small screens display teletext, date,
Information such as channel, time, volume, etc. can be displayed. In this case, for these small screens, it is only necessary to read the video signals from the memory and combine them once, so the configuration is simplified.

The circuit shown in Figure 1 can be used not only for television receivers but also for VTRs.
etc. can be incorporated into

〔Effect of the invention〕

As described above, according to the image display device of the present invention, when images with different aspect ratios are selectively displayed on one screen, the screen is set to a more horizontally elongated aspect ratio, and an image with a less horizontally elongated aspect ratio is displayed. When displaying , at least one small sub-image is displayed next to the main image.

Not only can images of each aspect ratio be viewed with their original aspect ratios, but other images can also be viewed at the same time, improving screen usage efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the image display device of the present invention, FIGS. 2 and d6 are timing charts explaining the operation of the embodiment of FIG. 1, and FIG. FIG. 4 is an explanatory diagram of the display screen in the embodiment, FIG. 4 is a diagram explaining the screen scanning method in the embodiment of FIG. 1, FIG. 5 is a perspective view of a monitor device to which the embodiment of FIG. 1 is applied, and FIG. 8 and 8 are diagrams for explaining a conventional image display method. 2... Time axis compression circuit, 9 to 11... Small screen processing circuit, 21... Main electron gun, 22... Screen, 23 to 25... Sub-electron gun, 31... Housing , 32...door, 33...window, 34...accommodation section. Fig. 3 2s Fig. 4 Fig. 8 Fig. 6 Cause (a) (b) Fig. 7 (b) Fig. 8

Claims (1)

[Scope of Claims] One of an image having a first aspect ratio and an image having a second aspect ratio that is laterally longer than the image having the first aspect ratio is selectively displayed on the screen having the second aspect ratio. The image display device includes: a first means for compressing a time axis of a video signal of an image having the first aspect ratio; and a small portion of the display area of the screen generated by the compression by the first means. a second means for processing a predetermined video signal so that it can be displayed on the screen; and a second means for processing a predetermined video signal so as to be displayed on the screen; a third means for synthesizing the outputs of the first means and the second means so that an image having the second aspect ratio or the third aspect ratio is displayed;
and fourth means for selecting one of the outputs of the means and displaying it on the screen.