JPS6235783A - Television receiver - Google Patents

Abstract

PURPOSE:To obtain a necessary still picture securely by delaying the screen of the 1st screen information among plural screens by the delay time of a delay circuit behind the screen of the 2nd screen information. CONSTITUTION:The delay circuit 16 is added to a slave screen signal system. Consequently, the image of a slave screen part C is delayed by the delay time of the delay circuit 16 behind the image of a master screen part B and a user pays attention to the slave screen part C after finding desired information on the master screen part B, and perform still image instruction operation when necessary information is reproduced, thereby obtaining the necessary still image.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television receiver having a multi-screen display function for displaying another reduced image on a portion of a single television screen.

Prior art Figures 2 and 3 show conceptual diagrams of this type of television receiver, where 8 is the television receiver, B is the main screen section, and C is the sub-screen section that displays a reduced image. . Further, as will be described later, since a field memory (or frame memory) is used in the screen embedding structure, it is easy to make the sub-screen a still image as an additional function, and this has become common.

Figure 2 shows an example where the same content as the main screen part B is displayed on the child screen part C, and Figure 3 shows an example in which the same content as the main screen part B is displayed on the child screen part C.
This is an example displayed. FIG. 4 shows an example of a conventional configuration. A tuner/channel selection circuit 2 selects a signal from an antenna 1 to an arbitrary channel, and a composite video signal is obtained via a VIF/detection circuit 3.

A composite video signal E is obtained from the external device 4 as another signal. External equipment 4 includes a VTR, video disc, and the like. For the above two composite video signals R and E, 'fG' is determined by the mode changeover switch 5 and the parent/child exchange switch 6 for the main screen signal F and the sub screen Id. The main screen signal F passes through the first video signal processing circuit 7 and is combined with the sub-screen E No. 1 in the sub-screen insertion circuit 8, and is applied to the cathode ray tube 9. On the other hand, the small screen signal G is applied to the memory 11 via the second video signal processing circuit 10, and the output of the memory 11 is input as the small screen signal J to the small screen insertion circuit 8.

The write clock to the memory 11 is generated by a write clock generation circuit 13 that operates based on a synchronization signal obtained from the child screen signal G via the second synchronization separation circuit 12, and is added to the memory 11. . Further, the read clock from the memory 11 is the first one from the main screen signal F.
The read clock generation circuit 15 operates based on the synchronization signal obtained through the synchronization separation circuit 14 of the above clock, and is added to the memory 11. FIG. 5 shows details of the mode changeover switch 5 and the parent/child exchange switch 6. When the mode changeover switch 5 selects composite video signal, the same content is displayed on the main screen section B and the subscreen section C. It is.

The reason why this mode is effective is that since the child screen section C can be made to stand still, it is possible to aim at a necessary scene and to make it stand still, and to obtain the information reliably. When the mode selector switch 5 selects the composite video signal E from the external device 4, the main screen section B and the sub-screen section E display different contents, and the parent-child exchange switch 6 selects the main screen section B and the sub-screen section E. The contents of the child screen section C can be replaced. In other words, it is possible to display a television signal from the antenna 1 on the main screen section B and a signal from an external device 4 such as a VTR on the sub-screen section C, or vice versa.

Problems to be Solved by the Invention In such a conventional configuration, when obtaining information by keeping the sub-screen portion C still, in most cases it is unclear when the necessary information will actually be sent, and The current situation is reflected in In other words, after the information to be made into a still image appears on the main screen section B, an operation is performed to freeze it, and a still image is given to the memory 11 with the freeze instruction 17, but if this operation is delayed.

There is a problem in that information has already been lost and the still image function is wasted.

An object of the present invention is to provide a television receiver that can reliably turn the necessary information into a still image by performing a still instruction operation after confirming that the necessary information has been sent.

Means for Solving the Problems The television receiver of the present invention displays a plurality of screens by inserting second screen information read from a memory into a part of the first screen information, and also includes a method for displaying a plurality of screens by inserting second screen information read from a memory into a part of the first screen information. The configuration is configured to control writing of the first screen information to make an image of the second image information of the plurality of screens a still image, and to write the first screen information to a transmission system of the second screen information or to the memory. The screen information transmission system is characterized in that a delay circuit is interposed in the screen information transmission system.

Effect Because of this configuration, the first screen information screen of the plurality of screens is delayed from the second screen information screen by the delay time of the delay circuit, so it is necessary to see the first screen information screen. After confirming that the necessary information has been sent, the user then looks at the second screen information screen and performs a still instruction operation at the time of the necessary information, thereby reliably obtaining the necessary still image.

Example A block diagram of an embodiment of the present invention is shown in FIG. 1 below.

In FIG. 1, blocks that are the same as those in FIG. 4 are given the same reference numerals and their explanations will be omitted. The difference between FIG. 1 and FIG. 4 is that a delay circuit 16 is added to the small screen signal system.

A delay circuit 16 is provided at the output of the memory 11, and delays the output of the memory 11 by an appropriate amount of time and adds the delayed output to the child screen insertion circuit 8. As a specific example of the delay circuit 16,
The small screen signal can be processed as a digital signal and configured with a memory or latch.

Because of this configuration, in the usage state shown in Figure 2,
The image on the child screen section C is delayed by the delay time of the delay circuit 16 with respect to the image on the main screen section B, and the user
After finding the information you want, pay attention to the sub-screen part C.
By performing a still instruction operation when the necessary information is reproduced, the necessary still image can be obtained.

It is clear that this delay circuit 16 can have a similar function by inserting it into the small screen signal system.
For example, the same applies to the child screen signal output of the parent/child exchange switch 6.

As described in the detailed description of the invention, the television receiver of the present invention displays a plurality of screens by inserting second screen information read from the memory into a part of the first screen information, and The second image information of the plurality of screens is configured to be a still image by controlling the writing of the first screen information, and the first screen information is transferred to a transmission system of the second screen information or to the memory. Because a delay circuit is inserted in the screen information transmission system, you can check the first screen information screen to confirm that the necessary information has been sent, and then check the second screen information screen to confirm that the necessary information has been sent. It is possible to carry out a still instruction operation at the time of reproduction of information, improving operability and reliably obtaining a necessary still image.

[Brief explanation of drawings]

Figure 1 is a block diagram of one embodiment of the present invention, Figures 2 and 3 are block diagrams of one embodiment of the present invention.
FIG. 4 is an explanatory diagram of a multi-screen display function, FIG. 4 is a block diagram of a conventional television receiver with a multi-screen display function, and FIG. 5 is a block diagram of the main parts of FIG. 6... Parent-child exchange switch, 7, 10... 1st, 2nd
video signal processing circuit, 8... sub-screen insertion circuit, 9...
- Braun tube, 11...Memory, 16...Delay circuit, 17...Still instruction, B...Main screen section, C...
Sub screen department agent Yoshihiro Morimoto Figure 2 Figure 3

Claims (1)

[Claims] 1. The second screen information read from memory is added to part of the first screen information.
screen information is inserted to display a plurality of screens, and writing of the first screen information to the memory is controlled to make an image of the second image information of the plurality of screens a still image. The television receiver further includes a delay circuit interposed in the second screen information transmission system or the first screen information transmission system to the memory.