JPS612477A - Multi-screen display television receiver - Google Patents

Abstract

PURPOSE:To obtain observable pictures reduced at their contrast variance in respective screens by adjusting a picture at its optimum state in each screen by a video adjusting circuit to display it. CONSTITUTION:A picture signal of a channel selected by a channel selection part 2 is extracted from a video detecting circuit 4 to a video switching circuit 11. On the other hand, the state of a video control circuit 13 adjusted by an observer so that the contrast, hue, color density, etc. of each screen are optimized is stored in a control storage circuit 14. A video adjusting circuit 12 adjusts a reproduced picture on the basis of the stored contents of the circuit 14 so that the contrast, hue, color density, etc. of the reproduced picture are optimized. The adjusted signal is applied to an A/D converter 5 and digitized similarly to other picture to be reproduced on multi-screen. Since the once adjusted contents are stored in the circuit 14, pictures are reproduced in the same adjusting state until the adjusting state is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a multi-screen display television receiver that displays two or more images on one display device.

[Prior art] Conventionally, there has been a device of this type as shown in FIG.

In the figure, (1) is the tuner, (2) is the tuning section, and (3
) is the channel selection switching section, (0 is the video detection circuit, (5) is the AD converter, (6) is the memory control section, (7) is the memory section, (8) is the DA converter, and (9) is the signal Processing unit, (10
) is an image display section.

Next, the operation will be explained. Broadcast radio waves from outside are received by the tuner (]). The receiving channel is selected by the tuning section (2
), but this channel is controlled and switched by the channel selection switching section (3). The output of the tuner (1) is demodulated into a video signal by the video detection circuit (4), and
D converter (converts to digital signal with 5 units)

The memory control section (8) stores the input signal in the memory section (7). 1 of 1 channel
When the storage for the screen is completed, the next channel is selected by the channel selection switching unit (3), and the video signal is stored in the memory unit (7) in the same process as described above.

These operations are repeated for the designated number of screens, and the video signals are sequentially stored in the memory section (7).

Next, the memory contents are read out after being time-converted by the memory control unit (8), and the signal processing unit (8) and image display unit (10) display P1 to P1 as shown in FIG.
A multi-screen consisting of 4 is displayed.

In this example, the number of screens is four, and each image is a still image corresponding to the switching time.

However, the above-mentioned conventional multi-screen display television receiver has the disadvantage that the contrast, hue, color density, etc. of the image differ from screen to screen due to the broadcast content and adjustment of the broadcast equipment, making it difficult to view.

[Summary of the Invention] This invention was made to eliminate the above-mentioned conventional drawbacks, and by adjusting and displaying the image in an optimal state for each screen using a video adjustment circuit, it is possible to improve the contrast between each screen. An object of the present invention is to provide a multi-screen display television receiver that can realize easy-to-see images with little variation.

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

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

In the figure, the same parts as in Figure 2 are given the same reference numerals.
The explanation will be omitted. In FIG. 1, a video switching circuit (11), a video adjustment circuit (12), a video control circuit (13), and a control storage circuit (14) are newly added to the configuration of FIG. 2.

Next, the operation will be explained.

The image signal of one of the multi-screen images, that is, the tuning section (
The image signal of the channel selected in step 2) is extracted from the video detection circuit (4) by the video switching circuit (11). On the other hand, the control memory circuit (14) contains information so that the viewer can optimize the contrast, hue, and color depth of each screen.
The state in which the video control circuit (13) has been adjusted is stored.

The image signal taken out from the video detection circuit (4) is given to the video adjustment circuit (12). Video adjustment circuit (12)
In accordance with the contents stored in the control storage circuit (14), adjustments are made so that the contrast, hue, color density, etc. of the reproduced image are optimized. The adjusted signal is sent to an AD converter (5
), and like other images, they are digitized and reproduced on multiple screens. In this case, since the content once adjusted is stored in the control storage circuit (14), the same adjusted state will be played back unless the adjusted state is changed thereafter.

By repeating the above operations for each screen, each image played on multiple screens will be displayed in its best condition, resulting in variations in contrast, hue, color saturation, etc. between each screen. Since the number of images can be reduced, it is possible to obtain an image that is easy to see.

In the above embodiment, the case where the video control circuit (13) is manually adjusted is shown, but the video control signal may be detected electrically and automatically adjusted. Also,
In the above embodiment, an example of multi-screen display of different screens has been shown, but it is also possible to display the same screen in different adjustment states and select the best adjustment state among them.

[Effects of the Invention] As described above, according to the multi-screen display television receiver according to the present invention, a video adjustment circuit that independently adjusts the image condition for each screen is provided, and the video adjustment circuit performs adjustment. Since the image is displayed on each display screen, there is less variation in contrast, hue, color saturation, etc. for each display screen, and for example, skin tones can be reproduced correctly, making it easier to see the image. It is possible to provide a multi-screen display television receiver.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing an embodiment of a multi-screen display television receiver according to the present invention, FIG. 2 is a block circuit diagram showing a conventional multi-screen display television receiver, and FIG. 3 is a block circuit diagram showing an embodiment of a multi-screen display television receiver according to the present invention. It is a figure which shows an example. (1)...Tuner, (2)...Tuning section, (3)...
・・Tuition selection switching unit, (4) ・・Video detection circuit, (5)・
...AD converter, (6)...memory control section,
(7)...Memory section, (8)...DA converter, (8
)...Signal processing unit, (10)...Image display unit, (1
1)...Video switching circuit, (12)...Video adjustment circuit, (13)...Video control circuit, (14)...Control storage circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) In a multi-screen display television receiver that displays two or more images on one display device, a video adjustment circuit that independently adjusts the image condition for each screen is provided, and this video adjustment circuit What is claimed is: 1. A multi-screen display television receiver, characterized in that an image adjusted by the image is displayed on each display screen.