JPS61194982A - Channel sign displaying device for television receiver - Google Patents

Abstract

PURPOSE:To enable respective channel signs to appear on the main and small screens by outputting channel sign signals for the main and small screens in response to the channel sign command signal and synthesizing the channel sign signals and image signals. CONSTITUTION:Image signals of Mt. Fuji form the first image signal processing circuit 9 and the ch (channel) sign signal [1] from the channel sign generator circuit 15 are delivered to the first synthesizing circuit 17. Image signals of an airplane from the second image signal processing circuit 10 and the ch sign signal [3] from the ch sign signal generator circuit 15 are delivered to the second synthesizing circuit 18. Image signals along with respective ch sign signals are fed from the first synthesizing circuit 17 and the second synthesizing circuit 18 to the third synthesizing circuit 19, which allows the CRT 13 to display Mt. Fuji with ch sign [1] in the main screen 13a and the airplane with ch sign [3] in the small screen section 13b.

Description

Detailed Description of the Invention (Technical Field) The present invention provides a television receiver equipped with a CRT having a main screen display portion and a sub screen display portion for displaying images of a main screen and a sub screen. In particular, the present invention relates to a channel sign display device that displays a channel sign on its display portion.

(Prior Art) Fig. 3 is a block circuit diagram of a channel sign display device of a television receiver according to a conventional example. 1
A control instruction signal is given from.

The control section 2 outputs a channel selection instruction signal, a video source switching signal, and a main screen channel sign instruction signal in response to the applied control instruction signal. The channel selection section 5 outputs a first channel selection signal and a second channel selection signal in response to a channel selection instruction signal from the control section 2.

The first tuner 3 is connected to the VHF and TJ obtained from the antenna.
Among the HF signals, the first one corresponding to the first tuning signal
The second tuner 4 selects and outputs the signal of the second channel corresponding to the second channel selection signal.

The first intermediate frequency processing circuit 6 processes the first channel signal and outputs it as a first video signal, and the second intermediate frequency processing circuit 7 processes the second channel signal and outputs it as a second video signal. do.

8, in response to a video source switching signal given from the control unit 2, a different first . This is a first changeover switch that switches each video signal of the second channel and outputs it individually. This first changeover switch 8 consists of two switch parts 81 and 82.

One switch section 81 has a first common contact al to which the first video signal is applied, and a first common contact al. Second individual contact point bl.

cl. The other switch section 82 has a second common contact a2 to which the second video signal is applied, and a third common contact a2. Fourth individual contact b2. c2.

9.10 are the first changeover switches 8, respectively. The first . a first video signal processing circuit that processes the second video signal and outputs it as a main screen video signal; second and third individual contacts cl;
The first given from b2. This is a second video signal processing circuit that processes the second video signal and outputs it as a small screen video signal. 11, both video signal processing circuits 9. This is a first synthesis circuit that synthesizes and outputs the main screen video signal and the child screen video signal from the IO. Reference numeral 14 denotes a channel sign generation circuit that outputs a main screen channel sign display signal in response to a channel sign instruction signal from the control section 2. Reference numeral 12 denotes a second synthesis circuit that synthesizes the channel sign display signal from the channel sign generation circuit 14 with the synthesized video signal of the main screen and child screen from the first synthesis circuit 11. Reference numeral 13 denotes a CRT having a main screen display part and a sub-screen display part, and in this CRT 13, a main screen display part has a main screen and a sub-screen display part corresponding to the main screen by the synthesis signal from the second synthesis circuit 12. A channel sign is displayed, and a sub-screen is displayed in the sub-screen display area.

FIG. 4 is a front view of the CRT 13. In FIG. 4(1), the CRT when the first changeover switch 8 is in the illustrated position and the common contacts al and a2 are switched.
13 is shown. That is, Figure 1 (1)
In this case, an image of Mt. Fuji is displayed on the main screen display area 13a, and the image of Mt.
An image of an airplane is displayed in h. As for the channel sign, rlJ, which is the channel sign for the image of Mt. Fuji, is displayed only in the main screen display section 13a, and the channel sign "3" for that channel is not displayed in the sub-screen display section 13b.

FIG. 4(2) shows the display state on the CRT 13 when the first changeover switch 8 has switched the common contacts al and a2 to the opposite position from that shown. In this case, an image of an airplane is displayed on the main screen display section 13a, and an image of Mt. Fuji is displayed on the sub-screen display section 13b. As for the channel sign, "3", which is the channel sign of the airplane image, is displayed in the main screen display part 13a, but the sub-screen display part 1
3b, there is no display of "1", which is the channel sign for the image of Mt. Fuji.

By the way, in such a television receiver, there is a case where it is desired to know which channel the video on the small screen display portion 13b belongs to. However, in the conventional channel sign display device, the first changeover switch 8
It is necessary to display the video of the child screen display portion +3b on the main screen display portion 13a by switching the screen. Such switching requires operating the operating section 1, which is cumbersome. Also, when you are enjoying a program whose video is on the main screen display section 13a, you can temporarily display the video on the sub-screen display section 13b on the main screen display section 13a, and then display the program you were enjoying again on the main screen display section 13a. It is also troublesome to perform operations for projecting images.

(Object of the Invention) It is an object of the present invention to solve the above-mentioned problems by simultaneously displaying respective channel signs on the main screen display section and the sub-screen display section.

(Structure of the Invention) For such purposes, the present invention provides a CRT having a main screen display portion and a sub screen display portion for displaying images of a main screen and a sub screen, and a video source switching signal. In response, the first . a first changeover switch that switches and outputs the second video signal individually; a second changeover switch that individually outputs the first and second channel sign signals of different channels in response to the video source switching signal; The 1st. A first video signal processing circuit and a second video signal processing circuit that process the second video signal and output it as a main screen video signal and a sub screen video signal, respectively; A channel sign generation circuit that outputs channel sign signals for the screen and for the child screen, a channel sign signal for the main screen from the channel sign generation circuit provided via the second changeover switch, and a channel sign signal for the main screen from the first video signal processing circuit. A first synthesizing circuit that synthesizes a video signal for a main screen, a channel sign signal for a child screen from a channel sign generation circuit also provided via a second changeover switch, and a child screen from the second video signal processing circuit. The present invention is characterized in that it includes a second synthesis circuit for synthesizing the video signals for use in the CRT, and a third synthesis circuit for again synthesizing the synthesis outputs from both of the synthesis circuits and outputting the synthesized output to the CRT.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is a block circuit diagram of a channel sign display device for a television receiver according to an embodiment of the present invention, and parts corresponding to those in FIG. 3 are given the same reference numerals. By externally operating the operating section 1, the control section 2 can control the operating section 1.
A control instruction signal is given from. The control section 2 outputs a channel selection instruction signal, a video source switching signal, and a main screen channel sign instruction signal in response to the applied control instruction signal. The channel selection section 5 outputs a first channel selection signal and a second channel selection signal in response to a channel selection instruction signal from the control section 2.

The first tuner 3 receives VHF and UH signals obtained from the antenna.
The second tuner 4 selects and outputs the first channel signal corresponding to the first tuning signal from among the signals of F, and the second tuner 4 selects and outputs the second channel signal corresponding to the second tuning signal. Select and output.

The first intermediate frequency processing circuit 6 processes the first channel signal and outputs it as a first video signal, and the second intermediate frequency processing circuit 7 processes the second channel signal and outputs it as a second video signal. do.

8, in response to a video source switching signal given from the control unit 2, a different first . This is a first changeover switch that switches each video signal of the second channel and outputs it individually. This first changeover switch 8 consists of two switch parts 81 and 82.

One switch unit 81 includes a first common contact a1 to which a first video signal is applied, and a first common contact a1. Second individual contact point bl.

cl. The other switch section 82 has a second common contact a2 to which the second video signal is applied, and a third common contact a2. Fourth individual contact b2. c2.

9 and IO are the first . The first . a first video signal processing circuit that processes the second video signal and outputs it as a main screen video signal; second and third individual contacts cl;
The first given from b2. This is a second video signal processing circuit that processes the second video signal and outputs it as a small screen video signal.

15 is a channel sign generation circuit that outputs channel sign signals for the main screen and for the child screen, respectively, in response to the channel sign instruction signal from the control unit 2; 16,
In response to the video source switching signal, the first . This is a second changeover switch that individually outputs the second channel sign signal. This second
The changeover switch 16 has two switch parts 161 and 16.
Consists of 2. One switch section 161 has a first common contact a3 to which the first channel sign signal is applied, and a first common contact a3.
It includes second individual contacts b3 and c3. The other switch section 162 is connected to the second switch section 162 to which the second channel sign signal is applied.
common contact a4, and the third. It includes fourth individual contacts b4 and c4.

17 is the first switch of the second changeover switch 16. a first synthesis circuit that synthesizes the main screen channel sign signal from the channel sign generation circuit 15 and the main screen video signal from the first video signal processing circuit 9, which are applied via fourth individual contacts b3 and c4; Reference numeral 18 denotes a channel sign signal for a small screen from the channel sign generating circuit 15, which is also applied via the second and third individual contacts c3 and b4 of the second changeover switch 16, and the second video signal processing circuit 10.
a second synthesis circuit for synthesizing the sub-screen video signal from 1;
Reference numeral 9 denotes a third combining circuit which again combines the combined outputs from both of the combining circuits 17 and 18 and outputs the result to the CRT 13.

Next, the operation will be explained.

1 in the position shown in FIG. Second changeover switch 8.1
When the common contacts a3 and a4 of 6 are switched, the first combining circuit 17 receives the Mt. Fuji video signal from the first video signal processing circuit 9, and at the same time, the channel sign generating circuit A channel sign signal of channel sign rlJ indicating that the program is on the Mt. Fuji channel is provided. On the other hand, in the second synthesis circuit 18, the video signal of the airplane is given from the second video signal processing circuit 1O, and the channel sign generating circuit 15 also sends the video signal of the airplane to the channel of channel sign "3" which is the program of the video signal of the airplane. A sign signal is given. As a result, the first combining circuit 17 to the third combining circuit 1
9, the video signal of Mt. Fuji is given as a main screen video signal together with its channel sign signal of "1", and the second to third synthesis circuits 18 to 19 are given the image signal of Mt. Fuji as a main screen video signal. The video signal is given as a small screen video signal together with its channel sign signal of channel sign "3". And the third synthesis circuit 19
For the CRT 13, as shown in FIG. 2 (1), the main screen display section 13a displays the image of Mt. Fuji along with its channel sign rN, and the sub-screen display section 13b displays the image of an airplane. The channel sign "3" will be displayed along with the video.

Conversely, operate the operation part l to select each changeover switch 8, I6.
When the switching operation is performed, as shown in FIG. 2 (2), the main screen display section 13a displays the image of the airplane along with its channel sign "3", and the sub-screen display section 13b
It has a channel sign rIJ with images of Mt. Fuji.
is displayed.

Therefore, according to this embodiment, as shown in FIG. 2, not only the channel sign of the main screen is displayed on the main screen display section +3a, but also the channel sign of the same is displayed on the sub-screen display section 13b. ing. From this, the channel of the program of the video in the sub-screen display portion 13b,
It is possible to easily visually recognize the display as it is without operating the operation unit 1.

(Effects of the Invention) As described above, according to the present invention, the channel sign is displayed not only in the main screen display area but also in the sub screen display area, so that the channel sign can be displayed without having to operate or remove the operation part. It is very convenient to know the channel of the program of the video in the sub-screen display part in the display state.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of a channel sign display device for a television receiver according to an embodiment of the present invention, and FIG.
IX2) is the C for showing the display state in the main screen display part and the child screen display part on the CRT according to the embodiment.
The front view of RT, Figure 3 is the block circuit diagram of the conventional example, Figure 4 is
Figures (1) and (2) are front views of the CRT corresponding to Figure 2. In each figure, numerals 8 and 16 are changeover switches, 9°lO is a video signal processing circuit, 15 is a channel sign generation circuit,
17, 18, and 19 are composite circuits.

Claims (1)

[Claims] (1) A CRT having a main screen display part and a sub-screen display part for displaying images of the main screen and the sub-screen, and first and second video signals of different channels in response to a video source switching signal. The first step is to switch and output the
a changeover switch; a second changeover switch that individually outputs first and second channel sign signals of different channels in response to the video source changeover signal; and a first changeover switch that individually outputs first and second channel sign signals of different channels in response to the video source changeover signal; a first video signal processing circuit and a second video signal processing circuit that process the second video signal and output it as a main screen video signal and a sub screen video signal, respectively; A channel sign generation circuit that outputs channel sign signals for the screen and for the child screen, and a channel sign signal for the main screen from the channel sign generation circuit that is applied via a second changeover switch and from the first video signal processing circuit. a first synthesizing circuit that synthesizes a video signal for a main screen, a channel sign signal for a child screen from a channel sign generation circuit also provided via a second changeover switch, and a child screen from the second video signal processing circuit; a second synthesis circuit that synthesizes the video signal for the
The combined outputs from both of the combining circuits are combined again to generate the CR.
1. A channel sign display device for a television receiver, comprising: a third combining circuit that outputs an output to a channel sign display device for a television receiver.