JP2554375B2 - Screen adjustment method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a screen adjustment method in a multi-screen display system in which one screen is divided into a plurality of screens and displayed, and more particularly to adjustment between screens adjacent in an oblique direction. Is.

[Conventional technology]

A multi-screen display system has been proposed in which one screen based on a television signal is divided into a plurality of screens and displayed by a plurality of display devices.

According to this display system, since one screen can be enlarged and displayed on a large screen, it is possible to obtain a high degree of visual psychological effects such as a sense of presence and a feeling of force, and increase the degree of impression given to the observer. .

By the way, in order to divide one screen into a plurality of screens for display, it is necessary to adjust the positional relationship between the screens. For example, as shown in FIG. 4, an image having a large inclination, such as a roof of a house or a sail of a yacht, is reproduced in order to adjust between adjacent screens in an oblique direction.

[Problems to be Solved by the Invention] However, since such an image having a tilt is only a part of the screen, it is possible to perform adjustment between screens in which a tilt is displayed, but between screens not displayed. No adjustment can be done. Also, while adjusting a screen, it is not possible to simultaneously check the effects of the adjustment of the screen on other screens.

Therefore, in order to adjust the entire screen, it is necessary to reproduce various images having an inclination and perform adjustment, which requires a lot of time and labor.

It is an object of the present invention to provide a screen adjusting method capable of easily adjusting the entire screen by achieving a positional relationship between screens, particularly matching between screens adjacent in an oblique direction.

[Means for solving the problem]

The present invention is a screen adjusting method in a multi-screen display system, in which one screen of a television signal is divided into a plurality of screens and the divided plurality of screens are displayed as one screen on a screen composed of a plurality of display devices. Input a signal for screen adjustment to display a hatch pattern that crosses diagonally across multiple divided screens, and
Each of the indicators is adjusted so that the pattern is accurately displayed on the screen of the multi-screen display system.

[Work]

In the present invention, when a diagonal crosshatch pattern is input in order to check the consistency between the screens adjacent to each other in the diagonal direction of the screen including a plurality of displays, this signal is divided into a plurality of horizontal and vertical directions, respectively. It is converted into a plurality of video signals corresponding to the plurality of display devices and supplied to each corresponding display device.

The adjuster controls the operator for adjustment of each display while observing the diagonal crosshatch pattern displayed on each display,
Adjust the linearity of the displayed diagonal crosshatch pattern and the consistency between adjacent screens, and adjust the diagonal connection of all screens.

In this case, 1 diagonal crosshatch over the entire screen.
Since the pattern is displayed, the adjustment work between screens is significantly improved, and it is possible to simultaneously check the influence of other screens during the adjustment of the screen.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a screen adjusting method according to the present invention. One screen of a television signal is a plurality of screens,
For example, divided into three screens by nine screen in the horizontal and vertical directions, an example is shown in which one frame is displayed by nine indicators D ₁ to D _9.

In FIG. 1, an input television signal TV is input to a YC separation circuit 1 and a sync separation circuit 2, a YC separation circuit 1 separates a luminance signal Y and a chrominance signal C, and a sync separation circuit 2
The horizontal sync signal HD and the vertical sync signal VD are separated by.

Of the signals separated by the YC separation circuit 1, the luminance signal Y is input to the interpolation signal generation circuit 3 and the scan converter 4, and the color signal C is input to the scan converter 4.

The interpolation signal generation circuit 3 takes a weighted average of the input luminance signal Y and a luminance signal delayed by one line or one field according to a moving image or a still image, generates an interpolation signal Yi, and inputs it to the scan converter 4. .

The scan converter 4 generates a video signal in which the input television signal TV is expanded three times in the horizontal and vertical directions from the luminance signal Y, the color signal C, and the interpolation signal Yi, and the expanded video signal is generated in the horizontal and vertical directions. each 3 luminance signal for dividing the display unit _{D 1 ~D 9 Y 1 ~Y 9} , to generate a color signal C ₁ -C ₉ in.

The color modulation circuit 5 uses the luminance signals Y _{1 to} Y ₉ and the color signals C _{1 to} C ₉ generated by the scan converter 4 and the horizontal and vertical sync signals HD and VD separated by the sync separation circuit 2 to NTSC.
The system video signals V _{1 to} V ₉ are generated. Video signal Vn (n
= 1-9) is a video signal generated by mixing the luminance signal Yn and the chrominance signal Cn, and adding the synchronizing signals HD and VD to the composite video signal of the NTSC system. _{1 to} V ₉ are input to the corresponding displays D _{1 to} D ₉ .

Display units D _{1 to} D ₉ are input NTSC video signals V ₁ to
Each display their own image by V _9, the combination of each image and displays the magnified image on each 3 times vertically and horizontally.

In this configuration, in order to check the linearity of each image displayed on each display D ₁ ~ D ₉ and the consistency between the screens,
A cross hatch as shown in Fig. 2 (a) or (b)
When a pattern signal is input, this signal is divided into three in the horizontal and vertical directions by the scan converter 4 and the color modulation circuit 5, respectively, and the video signals V _{1 to} V ₉ are displayed on each display.
Supplied on D _{1 to} D ₉ . For this reason, the indicators D _{1 to} D ₉ have a third
A cross-hatch pattern as shown in FIG.

The adjuster adjusts the horizontal width, height, linearity, etc. of each screen according to the pattern shown in FIG. 3 (a) to achieve the horizontal and vertical alignment between the adjacent upper, lower, left and right screens.
Also, the diagonally adjacent cross-hatch patterns shown in FIG. 3 (b) are used to align adjacent screens in the diagonal direction. In this case, the adjustment controls attached to each display D _{1 to} D ₉ for adjusting each screen, such as the width adjustment knob when the width is insufficient, the vertical linearity knob when the height is insufficient. , Adjusting pin balance and pin phase knobs to correct pincushion distortion.

Although the image of the crosshatch pattern is input as the television signal from the outside in the above-described embodiment, the crosshatch pattern generator may be incorporated in the scan converter. By doing so, the adjustment work can be performed more easily.

〔The invention's effect〕

According to the present invention, it is possible to easily adjust the consistency and linearity between the screens that are adjacent to each other in the diagonal direction, and it is also possible to simultaneously observe the effect of the screen being adjusted on other screens. , The adjustment work between screens can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a screen adjustment method according to the present invention, FIG. 2 is a view showing an example of an adjustment image input for screen adjustment, and FIG. 3 is an adjustment image shown in FIG. FIG. 4 is a view showing a display example of a conventional adjustment image on a plurality of display devices of FIG. 1 ...... YC separation circuit, 2 ...... sync separator, 3 ...... interpolation signal generating circuit, 4 ...... scan converter, 5 ...... color modulation circuit, D ₁ to D ₉ ...... indicator.

Claims (1)

(57) [Claims] 1. A screen adjusting method in a multi-screen display system for dividing one screen of a television signal into a plurality of screens and displaying the divided plurality of screens as one screen on a screen composed of a plurality of display devices. Input a signal for screen adjustment to display a hatch pattern that crosses diagonally across the divided screens so that the hatch pattern of the input signal is accurately displayed on the screen of the multi-screen display system. A screen adjusting method, characterized in that the respective display devices are adjusted.