JPH02278987A - Display test signal generator - Google Patents

Abstract

PURPOSE:To eliminate the need for the distribution and connection of a signal from a test signal generator to each display device by inserting a signal for test to a high definition television video signal. CONSTITUTION:A longitudinal line signal generating section 5, a lateral line signal generating section 6, and a switching section 7 are provided and plural longitudinal line signals and lateral line signals are generated respectively for a horizontal scanning period and a vertical scanning period of a high definition television video signal and inserted to the high definition television video signal. Thus, plural white level lines are displayed longitudinally and laterally on plural display patterns 81-8n. Based on the white lines, the phase of the horizontal and vertical display devices is adjusted and the convergence of each display device is adjusted. Thus, in the case of adjusting the installation of the display device and maintenance, the signal from the test signal generator is not required to be distributed and connected to each display device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a display test signal generation device, and particularly when a high-definition television image is divided and displayed on a plurality of current television monitors or video projectors, etc. The present invention relates to a display test signal generator used to adjust deviations between images.

[Conventional technology]

Conventionally, when high-definition television images are divided and displayed on multiple displays of the current television system, in order to adjust the deviation between each image, the test signal generator used in the current television system is used. This includes distributing the output signal to each display and using a test signal generator for high-definition television.

[Problem to be solved by the invention]

Because high-definition television images are high-definition, they are often displayed on large screens using multiple displays at various events or store halls, etc. During installation adjustment and maintenance, it is necessary to monitor each display under various installation conditions. I often have to gu.

The conventional method of distributing and connecting the signal from the test signal generator to each display to adjust the deviation between each image may be difficult depending on the installation conditions. Signal generators have the disadvantage of being expensive and requiring maintenance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display test signal generating device that eliminates the conventional drawbacks by inserting a test signal into a high-definition television video signal.

[Means to solve the problem]

The display test signal generation device of the present invention is a display test signal generation device used for image adjustment of a display device that stores a high-definition television video signal in a memory and divides and displays it on a plurality of displays of the current television system. means for generating a vertical line signal within one horizontal scanning period of the high-definition television video signal for displaying a plurality of white lines at regular intervals in the vertical direction on the screen of each of the plurality of displays; means for generating a horizontal line signal within one vertical scanning period of the high-definition television video signal for displaying a plurality of white lines at equal intervals in the horizontal direction on each screen of a display; and the high-definition television video signal. .

receiving the vertical line signal and the horizontal line signal, respectively, and switching any one of the high-definition television video signal, the vertical line signal, and the #I line signal according to the vertical line signal and the horizontal line signal; and a switching means for outputting the output.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the display test signal generation device of the present invention, and FIG. 2 is a screen showing an embodiment of the display screen when the display test signal generation device shown in FIG. 1 is used. It is a diagram.

In FIG. 1, a high-definition television video signal 10 input to a display test signal generator 1 is input to an A-D converter 2 and a synchronization processor 3.

The synchronization processing unit 3 separates the synchronization signal of the input high-definition television video signal 10 and generates a horizontal timing signal (hereinafter referred to as H signal) 13 and a vertical timing signal (hereinafter referred to as V signal) that conform to the current television system. 14 are generated and outputted to the vertical line signal generating section 5 and the horizontal line signal generating section 6. The clock generator 4 receives the H signal from the synchronization processor 3 and generates a write clock signal (hereinafter referred to as WCK signal) 11 for writing the video signal into the memory of the display signal converter 8 and a read signal for reading the same. A clock signal (hereinafter referred to as RCK signal) 12 is generated.

The A-D converter 1 receives the WCK signal 1 from the clock generator 4.
1, a high-definition television video signal 10 is sampled and converted into a digital video signal.

The vertical line signal generator 5 has a counter and a decoder, and the counter receives the WCK signal 11 from the clock generator 4 and counts up the received signal to output a count-up signal. The count value is reset in response to the H signal 13. Further, the decoder receives a count-up signal from the counter and outputs a plurality of white kIs within the horizontal scanning period in accordance with a preset count value.
Generates a vertical line signal 15 for displaying a line on the screen.

Similarly, the horizontal line signal generating section 6 also has a counter and a decoder, and the counter receives the H signal 1 from the clock generating section 4.
3, it counts up the count and outputs a count-up signal, and also resets the count value in response to the V signal 14 from the synchronization processing section 3. Further, the decoder receives a count-up signal from the counter and generates a horizontal line signal 16 for displaying a plurality of white lines on the screen within a vertical scanning period in accordance with a preset count value.

The vertical line signal 15 and the horizontal line signal 16 from the vertical line signal generating section 5 and the horizontal line signal generating section 6 are output to the switching section 7, respectively.

The switching unit 7 receives the digitized high-definition television video signal, the vertical line signal 15, and the horizontal line signal 16 from the A-D converter 1, and receives neither the vertical line signal 15 nor the horizontal line signal 16. When either the vertical line signal 15 or the horizontal line signal 16 is input, the input signal is output, and when the vertical line signal 15 and horizontal line signal 16 are input, the high-definition television video signal is output. When both signals 16 are input, the horizontal line signal 16 is output.

The display signal conversion device 8 receives the high-definition television video signal containing the vertical line signal 15 or the horizontal line signal 16 from the switching unit 7, and performs writing and reading to and from the memory according to the WCK signal 11 and the RCK signal 12. While doing so, a plurality of white lines are displayed vertically and horizontally together with a high-definition television image on the screen of each of the plurality of current television displays 81 to 8n.

FIG. 2 is a screen diagram showing an example of a display screen when the display test signal generating device is used. In the figure, there are four displays 81 to 8n in the horizontal direction;
A total of 12 devices are arranged, three in the vertical direction, and three white lines 20.30 are displayed in each of the vertical and horizontal directions on the screen of each display. Adjustment of each display can be performed using this white line as a reference.

〔Effect of the invention〕

As explained above, according to the display test signal generating device of the present invention, a plurality of vertical line signals and horizontal line signals are generated respectively during the horizontal scanning line period and the vertical scanning period of a high-definition television video signal. By inserting it into the video signal, a plurality of white lines are displayed vertically and horizontally on each of the plurality of display screens, and the horizontal and vertical phases of each display can be adjusted using these white lines as a reference. In addition, since the convergence of each display can be adjusted, there is no need to distribute and connect the signal from the test signal generator to each display during display installation adjustment and maintenance as in the past. There is no need to use a test signal generator for high-definition televisions, and furthermore, since the operation of each circuit of the display test signal generator itself can be checked at the same time, adjustment and maintenance are easy and burden-free.

WCK signal) 12... Read clock signal (RCK
signal) 13...Horizontal timing signal (H signal), 1
4... Vertical timing signal (■ signal) 15... Vertical line signal, 16... Horizontal line signal.

Claims (1)

[Scope of Claims] A display test signal generating device used for image adjustment of a display device that stores a high-definition television video signal in a memory and divides the signal into a plurality of displays according to the current television system for display. means for generating a vertical line signal within one horizontal scanning period of the high-definition television video signal for displaying a plurality of white lines at regular intervals in the vertical direction on each screen of the plurality of displays; means for generating a horizontal line signal for displaying a plurality of white lines at equal intervals in the horizontal direction on a screen within one vertical scanning period of the high-definition television video signal; the high-definition television video signal, the vertical line; a switching means that receives the signal and the horizontal line signal, respectively, and switches and outputs any one of the high-definition television video signal, the vertical line signal, and the horizontal line signal according to the vertical line signal and the horizontal line signal; A display test signal generating device comprising: