JPH0847004A - Method and device for adjusting television receiver - Google Patents

Abstract

PURPOSE:To adjust a television receiver with a laterally long side and to measure distortion quickly and accurately. CONSTITUTION:The device is made up of a circuit generating an image having an expansion ratio reverse to image compression for upper and lower peripheral parts in the wide zoom mode of a television receiver with a laterally long side and a circuit generating an image having an expansion ratio reverse to image compression for left and right peripheral parts in the full mode. The image signal generated by the circuits is given to the television receiver with a laterally long a side, on which images at a uniform interval are displayed and the image is picked up by a television camera 7 to make adjustment and to measure distortion. Or in place of the image generating circuits, a computer is used to analyze a television image pickup image and to display images at a uniform interval automatically as the image generating method. Thus, it is avoided that the images displayed at a ununiform interval are used for adjustment or distortion measurement images and then quick and accurate adjustment and measurement are conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television which is horizontally longer than a standard type having an aspect ratio of 3: 4 (hereinafter, simply referred to as "horizontal television"), and more specifically, adjustment of an output image of the horizontal television. It relates to a device and an adjusting method.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 5 is a block diagram of a conventional television adjustment device, FIG. 6 is a diagram for explaining adjustment of a television screen in a conventional wide zoom mode, FIG. 6A is a wide zoom mode output screen, and FIG. 7B is a diagram for explaining the measurement of the TV screen in the conventional full mode, FIG. 7A is a full mode output screen, and FIG. 7B is a TV camera. The imaging result of is shown.

The entire conventional television adjustment device 110 is shown in FIG.
It is composed of blocks shown in. A television camera 7 is installed so as to face the television receiver 4, and the CRT surface 5 of the television receiver 4 is focused. The image is formed on the image sensor 8 by the lens 6, converted into an electric signal, and input to the A / D converter 9 and the monitor 11.
The digital value is converted by the A / D converter 9 and stored in the image memory 10, and the distortion or brightness level of the television receiver 4 is measured and adjusted based on the stored image data.

First, the wide zoom mode of the landscape television will be described. When a conventional television signal having an aspect ratio of 3: 4 is input to a horizontally long television at the same ratio, only a horizontally long portion remains as a strip-shaped black portion that is not displayed on the screen. If the screen is displayed for a long time in this state, a difference occurs in the screen burn state, and the CRT surface is not in a uniform state.

Further, when the image is displayed so as to be fully expanded in the horizontal direction, since the vertical direction remains unchanged, the screen is uniformly crushed, which causes a visually unnatural feeling. In order to improve this unnaturalness, some horizontal TVs compress the upper and lower peripheral parts of the TV screen and display the central part with a value close to a normal aspect ratio. This display mode is called a wide zoom mode.

FIG. 6 (a) shows that the horizontal line signals 24A having equal intervals are input and displayed in the wide-zoom mode of the above-described horizontal television. This figure shows a vertical sweep waveform 22 that compresses the upper and lower peripheral portions between the vertical sync signals 21.
Field image signal 23 consisting of horizontal lines at equal intervals
Indicates that this horizontal line is compressed and displayed in the upper and lower peripheral portions.

In order to adjust the television in this state, when the television camera 7 photographs the portions A and B in FIG. 6A, the image pickup output is as shown in FIG. The line is denser at the location B than at the location. Therefore, the MTF (Modulation Trans) of the measurement optical system
Since the brightness level of this image is output differently, including effects such as the "Fer Function", correct television adjustment cannot be performed based on this image.

Next, the full mode of the landscape television will be described. This is a method in which the screen is stretched in the horizontal direction to the full screen in the vertical direction while maintaining a regular interval between scanning lines, and in this case also, it is visually unnatural due to the difference in the aspect ratio. In order to improve this unnaturalness, there is a display in which the left and right peripheral portions are further extended and the central portion is displayed with a value close to a normal aspect ratio. This display mode is called a full mode.

FIG. 7 (a) shows the full-width mode of the above-mentioned horizontal television, in which vertical line signals having equal intervals are input and displayed as signals. This figure shows that the 1-line image signal 33 between the horizontal synchronizing signals 32 is expanded in the left and right peripheral portions, and it is displayed on the TV screen display 31 with an aspect ratio of 3: 4 and the full-mode screen display of a landscape TV. This is a comparison of 30.

In order to adjust the television in this state, when the television camera 7 photographs the portions C and D in FIG. 7A, the image pickup output is C as shown in FIG. 7B. Lines are sparser at the D locations than at the locations. Therefore, as in the wide zoom mode, the MTF of the measurement optical system is
Since the brightness level of this image is output differently, including such effects, it is not possible to adjust the television correctly based on this image.

[0011]

As described above,
In wide zoom mode of landscape TV, the upper and lower parts of the screen are compressed, and in the full mode, the left and right parts of the screen are stretched. However, it was difficult to accurately adjust the distortion of the entire screen. Therefore, the present invention seeks to accurately measure and adjust the distortion and brightness level of the entire screen in any output mode of a landscape television.

[0012]

The present invention was devised to solve the above problems, and in a wide zoom mode of a landscape TV, an image expansion ratio opposite to the image compression ratio of the upper and lower peripheral portions of the screen. An image signal generation circuit for displaying horizontal lines evenly arranged on the entire screen by placing an image signal on the horizontal scanning line selected in

Further, in the full mode, by arranging image signals on the horizontal scanning lines at an image compression ratio opposite to the image expansion ratio of the left and right peripheral portions of the screen, an image displaying vertical lines evenly arranged on the entire screen is displayed. Providing a signal generation circuit,

The image signals of the respective image signal generating circuits are input to and displayed on a television receiver, the display screen is photographed by a television camera and displayed on a monitor, and the monitor is observed to monitor the television receiver. Using the method of measuring and adjusting the distortion and light and dark levels,

Further, the above-mentioned image signals to be evenly arranged are obtained by photographing the entire television screen with a television camera and observing the output on a monitor, and inputting image information to an image memory from the outside with a keyboard or the like, or with the television camera. The object is solved by a method of calculating photographed image information by a computer, automatically generating an image signal for uniform distribution from the calculation result, and inputting the image signal to an image memory.

[0016]

With the configuration described above, a test image evenly arranged on the entire screen can be displayed in any output mode of the landscape TV, and the TV is adjusted based on the image captured by the TV camera on the TV screen. And strain measurement can be performed accurately.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A television adjusting apparatus and an adjusting method of the present invention will be described with reference to FIGS. FIG. 1 is a block configuration diagram of a television adjustment device, FIG. 2 is a diagram showing a method for correcting a horizontal line input and displaying it at equal intervals on an output screen in a wide zoom mode, and FIG. 3 is an output in a full mode. It is a figure which shows the method of correct | amending a vertical line input and displaying it on a screen at equal intervals. 4A and 4B are views for explaining the automatic adjustment method, FIG. 4A is a block diagram of the system, FIG. 4B shows accumulated images in the image memory 18 before and after adjustment, and FIG. ) Indicates an image stored in the image memory 10 before and after the adjustment.

First, the entire television adjusting apparatus 100 is shown in FIG.
It is composed of blocks shown in. A television camera 7 is installed so as to face the television receiver 4, and the CRT surface 5 of the television receiver 4 is focused. Also,
It is possible to take an image of the entire cathode ray tube surface 5 and also to take an enlarged image of a part of the cathode ray tube surface 5 by a zoom mechanism of the camera.

An image is formed on the image pickup element 8 by the lens 6, converted into an electric signal and input to the A / D converter 9 and the monitor 11. It is converted into a digital value by the A / D converter 9 and stored in the image memory 10. CPU13
Controls the pattern signal generating circuit 15 and the timing signal generating circuit 16 based on the image data in the image memory 10 to generate image signals which are evenly arranged on the cathode ray tube surface 5, and analyzes the image data to distort the image. The quantity is calculated and output to the measurement display device 14. Further, various processing of an image can be performed by a signal from an external input device such as the keyboard 12.

Next, a method of correcting the horizontal line input and displaying the lines at equal intervals in the wide zoom mode will be described. As shown in FIG. 2, the vertical sweep waveform 22 is shown in FIG.
The waveform is the same as the conventional waveform shown in, and is displayed in the wide-zoom mode of a landscape television. As described in the conventional example, if the field image signals 23 at equal intervals in FIG. 5A are input in this state, the upper and lower peripheral portions are compressed. Therefore, the field image signal 2
By inputting the field image signal 23 having an image expansion ratio 3 which is the reverse of the image compression ratio, it is possible to obtain an image display uniformly arranged as shown in FIG.

Further, a method of correcting the vertical line input and displaying at equal intervals in the full mode will be described. As described in the conventional example, in the full-width mode of the landscape television, the left and right peripheral portions are expanded when the frame image signal composed of the one-line scanning signal 33 at equal intervals in FIG. 6A is input. Therefore, by inputting the 1-line scanning signal 33 having an image compression ratio opposite to the image expansion ratio shown in FIG. 3 to the frame image signal, an evenly arranged image display as shown in FIG. 3 is performed. Obtainable.

Incidentally, it is natural that the image signal may use a crosshatch or a dot signal in addition to the horizontal line and the vertical line.

An example of a method for automatically generating image signals to be displayed in a uniform arrangement will be described with reference to FIG. The configuration is shown in Figure 1.
Although it is basically the same as the television adjusting apparatus 100 shown in FIG. 1, a computer 17 for arithmetic processing and an image memory 18 for accumulating a generated image are added, and the cathode ray tube 1 is provided with the pattern signal generating circuit 15 of FIG. The image signal from the image memory 18 is input instead of the signal.

First, the image memory 18 is shown in FIG.
Computers 17 create and store images at even intervals as shown at 18A in (b). Next, this image signal is displayed on the cathode ray tube 1, and the display image on the landscape television becomes distorted as shown by 10A in FIG. 4 (c). The image 10A is captured by the television camera 7 and stored in the image memory 10. The image 10A is analyzed by the computer 17, and an image as shown by 18B in FIG. 4B is generated and stored in the image memory 18. This image signal 18 is input to the cathode ray tube 1, and the image signal 10 shown in FIG.
Images with even intervals such as B are displayed. Also, image 1
0A is photographed by the television camera 7 and stored in the image memory 10, and becomes the analysis data of the computer 17. Actually, the above-described process is repeated many times to obtain the optimum image 18B.
Is generated.

[0025]

As described above, according to the present invention, it is possible to project a test image evenly arranged on the entire screen in any output mode of a landscape television.
The screen can be accurately measured by the TV camera, and the TV can be easily adjusted.

Further, images which are evenly arranged by this adjusting device are displayed on a landscape television, and the image signal is compared and examined between the position on the screen and the position on the actual electric signal to thereby display the landscape television screen. The amount of strain at any position can be measured.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a television adjustment device according to the present invention.

FIG. 2 is a diagram showing a method of correcting horizontal line inputs and displaying them at equal intervals on an output screen in a wide zoom mode.

FIG. 3 is a diagram showing a method of correcting vertical line inputs and displaying them at equal intervals on an output screen in full mode.

FIG. 4 is a diagram for explaining a method of automatic adjustment,
(A) is a block diagram of the system, (b) shows stored images in the image memory 18 before and after adjustment, and (c) shows stored images in the image memory 10 before and after adjustment.

FIG. 5 is a block configuration diagram of a conventional television adjustment device.

FIG. 6 is a diagram for explaining adjustment of a television screen in a conventional wide zoom mode, in which (a) shows a wide zoom mode output screen and (b) shows an image pickup result of a television camera.

FIG. 7 is a diagram for explaining measurement of a television screen in a conventional full mode, in which (a) is a full mode output screen,
(B) shows the imaging result of the television camera.

[Explanation of symbols]

 1 CRT 4 TV receiver 5 CRT surface 6 Lens 7 TV camera 8 Image sensor 9 A / D converter 10 Image memory 10A Image of memory 10 before automatic adjustment 10B Image of memory 10 after automatic adjustment 11 Monitor 12 Keyboard 13 CPU 14 Measurement display device 15 Pattern signal generation circuit 16 Timing signal generation circuit 17 Computer 18 Image memory 18A Image of memory 18 before automatic adjustment 18B Image of memory 18 after automatic adjustment 19 Measuring device 20 Wide zoom mode screen 21 Vertical sync signal 22 Vertical Sweep waveform 23 Field image signal 25 Camera output 30 Full mode screen 32 Horizontal sync signal 33 1 line image signal 35 Camera output

Claims (5)

[Claims] 1. A television receiver for displaying an image by compressing the upper and lower peripheral portions of a television screen, and an image signal generating circuit having an image expansion ratio opposite to the image compression ratio of the upper and lower peripheral portions. A television adjustment device comprising: 2. In a television receiver for displaying an image by expanding the left and right peripheral parts of a television screen, an image signal generating circuit having an image compression ratio opposite to the image expansion ratio of the left and right peripheral parts. A television adjustment device comprising: 3. The television receiver is adjusted by including means for inputting and displaying an image signal having the expansion ratio according to claim 1 to a television receiver and displaying and displaying the displayed image with a television camera. A television adjustment method characterized by the above. 4. The television receiver is adjusted by including means for inputting and displaying the image signal having the compression ratio according to claim 2 to the television receiver and displaying and displaying the displayed image with a television camera. A television adjustment method characterized by the above. 5. The entire screen of a television receiver is displayed by a television camera regardless of whether the upper and lower peripheral portions of the TV screen are compressed and displayed as images or the left and right peripheral portions are expanded and displayed as images. A television adjustment device comprising a circuit which is controlled by image information obtained by photographing and automatically generates an image signal for always displaying an even arrangement.