JPS62272680A - Display system for slave picture side in television receiver - Google Patents

Abstract

PURPOSE:To know the contents or the type of a video source in a slave picture side without interrupting a TV broadcasting program in a master picture side by displaying the contents or the type of the video source relating to a slave picture video based on a video source discriminating signal. CONSTITUTION:The movable contact 7d of a video source signal change over switch 7 is changed over and moved in response to a video source change over signal from an operating part 1. From a frame generating circuit 9, a slave picture frame signal and signals SH and SV formed in the frame generating circuit 9 are applied to a frame synthesizing circuit 10, a master and slave picture synthesizing circuit 11 synthesizes a master picture video signal with a slave picture frame synthesizing signal and outputs the synthesizing output to a CRT 12 as a master and slave picture synthesizing signal. On the television picture of the CRT 12, the character (A) is projected on a master picture display part al, the character (B) is projected on a slave picture display part a2 and a color corresponding to the type of the video source is projceted on a frame display part a3. Thereby, the type or the contents of the video source in the slave picture side can be known without interrupting the viewing of the TV broadcasting in the master picture side.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Technical Field) The present invention provides a method for displaying one or more parent screens and one or more child screens on the same television screen. The present invention relates to a television receiver having a sub-screen, and more particularly to a display method for a sub-screen in a television receiver that discriminates and displays the type of video source displayed on the sub-screen.

The parent screen and child screen here refer to the screen that is located in the center of the television screen when the television screen is divided into several display areas, or is displayed as a large screen so that the viewer can watch the television broadcast program. The main screen is the display area where viewers mainly enjoy watching the progress, while the main screen is displayed at a remote location of the television screen, or it is displayed as a small screen where viewers can enjoy the television broadcast on the main screen side while watching another TV screen. The child screen is a display area used when you want to know the progress of a John broadcast program.

(Prior art) In conventional television receivers of this type, there are multiple types of video source signals to be given to the sub screen side, one of which is
Some video source signals are selected and displayed on the sub-screen side. By the way, in the past, when a user wanted to know the type of video source on the child screen, the video source was switched to the main screen.

However, such a switching operation is not preferable because it is troublesome and also causes viewing of the program on the main screen television broadcast to be interrupted even temporarily.

(Object of the Invention) The present invention eliminates the need for such switching operations, and also allows the content and type of the video source on the sub-screen to be known without interrupting the television broadcast program on the main screen. Let 1 be the target.

(Structure of the Invention) In order to achieve the above object, the present invention provides a video source switching signal corresponding to the switching position of a video source signal switching switch, and in response to the video source switching signal, the small screen processing circuit a first circuit that forms and outputs a video source discrimination signal for discriminating and displaying the content and type of the video source signal input to the circuit; a second circuit that synthesizes and outputs both signals, and displays a sub-screen on the front handle screen display portion based on the sub-screen video signal of the two signals included in the combined output signal from the second circuit. The video is displayed, and the type and content of the video source related to the sub-screen video are displayed based on the video source discrimination signal.

(Embodiment) FIG. 1 is a schematic overall circuit diagram of a television receiver to which a small screen side display method according to an embodiment of the present invention is applied. The television screen of this television receiver has a main screen display portion that occupies most of the screen and is displayed, and a sub-screen display portion that occupies the remainder of the screen and is displayed. In this example, for the convenience of explanation - 1-1 If the signal is related to the main screen display part, the name of the main screen is attached to each signal described later, and the signal is related to the child screen display part. In this case, each signal, which will also be described later, is given a sub-screen name.

In FIG. 1, an operating section 1 provided on the front panel of a television receiver is operated.

By this operation, a channel selection instruction signal is given from the operation section 1 to the channel selection section 2. The channel selection unit 2 outputs a channel selection signal to the chicorer 3 in response to the provided channel selection instruction signal.

The tuner 3 selects and outputs a channel signal related to the broadcast program corresponding to the main screen from among the V HF and U HF signals obtained from the receiving antenna 4 in response to the applied channel selection signal. The main screen processing circuit 5 connected to the main screen 3 outputs a main screen video signal in response to the channel signal, and also separates vertical (V) and horizontal (H) synchronization separation signals from the signal. Output.

The video source input terminal 6 includes a plurality of (three in the embodiment) input terminals 6a, 6b, and 6c.

Input terminals 6a, 6b, and 6c are input terminals for the first video and second video of the combicoater RGB1, respectively, and corresponding signals are applied to each input terminal.

The video source signal changeover switch 7 is connected to each of the input terminals 6a.
', 6b, and 6c individually corresponding to individual contacts 7
a, 7 b, 7 c, and each individual contact 7 a, 7
It consists of a movable contact 7d that switches between 7d and 7c. The movable contact 7d can be switched and moved in response to a video source switching signal from the operating section 1.

The child screen processing circuit 8 outputs a child screen video signal while being synchronized by the synchronization separation signal from the main screen processing circuit 5.

The video source switching signal is applied from the operation section 1 to the frame generation circuit 9. The frame referred to here refers to a frame display portion that is displayed with a predetermined frame width along the periphery of the small screen display portion on the television screen. The frame generation circuit 9 is supplied with a synchronization separation signal from the main screen processing circuit 6. When the frame generation circuit 9 is given the video source switching signal,
A child screen frame signal (coloring signal) corresponding to the frame display portion is output while synchronizing with the synchronization separation signal.

This sub-screen frame signal corresponds to the video source discrimination signal recited in the above-mentioned claims.

The frame generation circuit 9 outputs a sub-screen frame signal and the frame generation circuit 9.
Signals SH and SV generated internally are applied to the frame synthesis circuit 10. Furthermore, the frame synthesis circuit 10 is supplied with a small screen video signal from the small screen processing circuit 7 . Frame synthesis circuit 1o
forms a 1,000-sided frame composite signal based on these signals and stops outputting it.

The parent and child screen synthesis circuit 11 receives the parent screen video signal and the double-sided frame synthesis signal. Parent and child screen composition circuit 11
combines the main screen video signal and the 1000-sided frame composite signal and provides the parent and child screen composite signal to CR'l'+2.

As a result, on the television screen of CRT I2,
A main screen and a child screen displayed in a frame are displayed.

FIG. 2 is a detailed circuit diagram of the frame generation circuit 9 and the frame synthesis circuit 10, which are the main parts of the embodiment of the present invention, and FIG.
2 is a diagram illustrating a television screen of the CRT 12 for explaining the operation of the circuit shown in FIG. In Fig. 3, a is the television screen, al is the main screen display part where the characters , for example, are displayed, a2 is the sub-screen display part where the characters B are displayed, for example, and a3 is for easy understanding. This is the frame display area that is displayed as hatching, and is the area that displays the content and type of the video source on the child screen side.

(1) The frame generation circuit 9 will be explained.

Synchronous separation signal 1 from the main screen processing circuit 6 ((horizontal).

(vertical) is input to the synchronization separation signal processing circuit 13. The sync separation signal processing circuit 13 calculates the number of horizontal sync separation signals I out of the given sync separation signals based on the vertical sync separation signal V (the waveform is shown in the form of a pulse in FIG. 3); Count nH and nH'. Specifically, these counts nll and n11' are calculated based on the horizontal frame display part (upper part b
2 and the number of horizontal sync separation signals 11 up to the lower part b3).

According to the count results, on the television screen, horizontal frame display parts b2 and b3 (however, b3 is the lower part) and vertical frame display parts b4 and b5 (however,
vertical direction signals corresponding to the respective display positions of the horizontal frame display portions b2 and b3 on the television screen of the sub-screen frame display portion a3 consisting of the left side b4 and the right side b5. SV (2 of cl, c2 in Figure 3)
pulses) and outputs them.

The sync separation signal processing circuit 13 also calculates the count of the horizontal counter 14, for example, nc, nc, based on the horizontal sync separation signal H (the waveform of which is shown in the form of a pulse in FIG. 3) that is also applied. ', same as above, 1. count. Specifically, this count corresponds to the distance from the left edge h6 of the television screen to the vertical frame display part b4°b5 located in the drawing's -1 right direction (horizontal direction), and from b6 to b4. corresponds to the count value nc, and b6 to b5 respectively correspond to the count value nc'.

According to this count result, a horizontal direction signal SH (two pulses dl and d2 in FIG. 3) corresponding to each of the vertical direction frame display parts b4 and b5 of the child screen frame display part a3 is created and output. The display position of the frame display portion a3 displayed in a frame around the child screen display portion a2 can be determined by the timing at which each of the signals S H and S V is output. Vertical signal SV and horizontal signal S I- created in this way
1 is output to the child screen frame signal output unit 15 and a frame signal processing circuit 19, which will be described later, in the frame synthesis circuit 10, respectively.

A video source switching signal is applied to the color control circuit 16 from the operation section 1 . The color control circuit 16 controls three primary colors, red (R) and green (G), in response to an applied video source switching signal.
Three contact points SWR corresponding to each color of blue (B)
, SWG, and SWB.

Each contact point SWR, SWG, and SWn of the switch switches the connection between the color generation circuit 18 and the frame signal output circuit 15. Since the color generation circuit 18 outputs R, G, and B color signals individually, each of the 23-8 color signals is selected by the combination of the connection switches of the contacts SWR, SWG, and SWB, and the frame is generated. It will be output to the signal output circuit 15.

For example, if the video source switching signal input to the color control circuit 16 is applied to the RGr1 input terminal 6a, the contact SWG
is closed, and as a result, a color signal for displaying the child screen frame display portion a3 as a green frame is output from the color generation circuit 18 to the frame signal output circuit 15. Also, the video source switching signal is
Contacts SWR and SWG when applied to video input terminal 6b
are closed together, and as a result, a color signal for displaying the sub-screen frame display portion a3 in yellow is output from the color generation circuit 18 to the frame signal output circuit 15. Further, when the video source switching signal is applied to the second video input terminal 6C, the contact SWR is closed and the color signal for displaying the sub-screen frame display portion a3 as a red frame is transmitted from the color generation circuit 18 to the frame signal output circuit 15. Output.

In this way, the color control circuit 16 controls the contact S of the switch I7.
Outputs a control signal for switching connections of WR, SWG, and SWB.

Therefore, by looking at the type of color in the frame display portion a3 of the sub-screen, it is possible to determine from which input terminal the video source displayed on the sub-screen comes from. Note that the frame signal output circuit 15 outputs a child screen frame signal corresponding to each color signal.

The small screen frame signal generation circuit 15 receives the applied signal S I-
1. Color signal R is applied to the frame display portion a3 corresponding to the width of SV,
G and B are combined and the combined output is the child screen frame signal-11.
= Output as a signal.

(2) The frame synthesis circuit 10 will be explained.

The frame signal processing circuit 19 is supplied with the signals S V and S H from the synchronization separation signal processing circuit 13 of the frame generation circuit 9 . The frame signal processing circuit I9 processes each signal SV.

The frame signal output circuit 20 generates vertical and horizontal signals SV' and SR' of the child screen from SH as shown in FIG.
Output to. These signals SV' and SH' are signals related to the timing of the sub-screen display position on the television screen, and the pulse width in the vertical and horizontal directions is the length of the sub-screen display portion a2 in the vertical and horizontal directions. It corresponds to

The frame signal output circuit 20 is supplied with the small screen video signal, the respective signals SV' and Sll°, and the small screen frame signal from the frame signal output circuit 15. The frame signal output circuit 20 forms a thousand-sided frame synthesis signal based on each signal and outputs it to the parent-child screen synthesis circuit 11. The 1000-sided frame composite signal output in this way includes the information of the sub-screen video signal and the sub-screen display portion a.
2 and the frame display portion a3 on the television screen, and coloring information displayed on the frame display portion a3.

The parent-child screen synthesis circuit 11 synthesizes the parent-screen video signal and the 1000-sided frame synthesis signal, and outputs the synthesized output as the parent-child screen synthesis signal to the CRTI 2, so that the CRT+2
The television screen shows an image like the one shown in Figure 3, that is,
The letter A is in the main screen display part al, and the letter A is in the child screen display part a.
The letter B is displayed on the screen 2, and the color corresponding to the type of video source is displayed on the frame display portion a3.

In this manner, in the embodiment, it is possible to know in the frame display portion a3 what type of video source of the child screen displayed in the child screen display portion a2 belongs.

In the above embodiment, the type of video source on the sub-screen side is displayed in a frame surrounding the sub-screen display part using the sub-screen frame signal, which is a video source discrimination signal, but other video source discrimination signals may be used. inside the sub-screen display part, not around it.
Alternatively, it may be displayed in an appropriate display format at any location on the television screen.In short, it is sufficient to know the content of the video source received on the sub-screen side, so other modifications other than the embodiments are also contemplated by the present invention. Of course, it is included.

(Effects of the Invention) According to the present invention, the content of the video source related to the sub-screen video displayed in the sub-screen display area is displayed on the telepinoy screen, so that it is easy to know the content. Special operations are no longer required.

In addition, when performing this operation, there is no need to switch the sub-screen image displayed on the sub-screen side to the main screen side, so viewing of the television broadcast on the main screen side is interrupted. This has the excellent effect of allowing the viewer to know the type and content of the video source on the sub-screen side without being affected.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a schematic overall circuit diagram of a television receiver to which a display system according to the embodiment is applied, and FIG. 2 is a circuit diagram of main parts of the embodiment. FIG. 3 is a diagram for explaining the operation of the main part of the embodiment. 9 is a frame generation circuit, 10 is a frame composition circuit, II is a parent-child screen composition circuit, and 12 is a CRT.

Claims (1)

[Claims] (1) A television screen is divided into a main screen display part and a sub-screen display part, and the main screen display part displays a main screen corresponding to the main screen video signal given from the main screen processing circuit, and In the sub-screen display portion, a sub-screen corresponding to the sub-screen video signal given from the sub-screen processing circuit that processes the video source signal is displayed, and the sub-screen processing is performed via the switching operation of the video source signal changeover switch. The circuit is provided in a television receiver to which one of a plurality of video source signals is selectively applied, and is provided with a video source switching signal corresponding to the switching position of the video source signal switching switch. , a first circuit for forming and outputting a video source discrimination signal for discriminating and displaying the content and type of the video source signal input to the small screen processing circuit in response to the video source switching signal; A second circuit is provided with a screen video signal and the video source discrimination signal and outputs a composite output of the two signals, and the second circuit includes a second circuit that outputs a composite output signal from the second circuit. A television reception characterized in that a sub-screen image is displayed on the sub-screen display portion based on the screen video signal, and the type and content of the video source related to the sub-screen image are displayed based on the video source discrimination signal. The display method of the child screen on the machine.