JPH01277073A - Television receiver - Google Patents

Abstract

PURPOSE:To display a reserved program on a slave screen when a power source is set at an applied state at a time reserved and preset and to display the reserved program on a master screen when the power source is set at a disconnected state by providing a means to control the display of a CRT by judging the applied state of the power source. CONSTITUTION:Channel selection/setting is performed so that a prescribed channel can be operated at a prescribed time by depressing a reservation button on a keyboard 33 or a remote controller 34. Afterwards, when a preset time coincides with the present time and the timer 17 of a CPU31 is set at an ON state, the CPU31 judges the state of the power source 35, and sets the ON state of the power source 35 when it is not applied, and displays the output signal of a tuner 3 for master screen on the CRT6 via a PLL22. Also, when the power source 35 is applied, the CPU31 judges whether or not the turning ON of the slave screen, and turns on the slave screen by channel-selecting by reservation timer data when it is not applied. In such a way, it is possible to display the reserved program on the master screen when the power source is disconnected without missing an impotant scene by the sudden switching of the reserved program at the reserved time of the timer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television receiver having a reservation timer function and capable of simultaneously displaying a plurality of programs.

[Summary of the invention]

The present invention relates to a television receiver that has a reservation timer function and can display multiple programs at the same time.When the power is turned on at the time reserved by the reservation timer function, the reserved program is displayed on the sub-screen. When the power is not turned on, the reserved program is displayed on the main screen, and when the scheduled time comes, the screen that is currently being viewed on the cathode ray tube suddenly changes, and when the power is not turned on, the reserved program is displayed on the main screen. This prevents the program from being displayed on the sub-screen.

(Conventional technology) Conventionally, a television receiver has a built-in timer function.
A television receiver has been proposed that selects the reserved channel and projects the reserved program on a cathode ray tube when the reserved time matches the current time.

In such television receivers, there is a problem in that the program suddenly changes when the reserved time has come. Therefore, in order to simultaneously display two or more television programs on one cathode ray tube, the second tuner selects a channel on the main screen of the television broadcast selected by the first tuner. Japanese Patent Publication No. 62-47392 discloses a two-screen television receiver that eliminates the above-mentioned drawbacks by displaying a reduced screen, that is, a sub-screen, of a television program. FIG. 3 shows a system diagram of this two-screen television receiver. This configuration uses a timer function to switch the program displayed on the cathode ray tube to the reserved program when the start time of a program reserved by someone else, or a program that you have reserved but have forgotten. This is done so that you will not miss any important scenes.

In Figure 3, (1) is the selection button for selecting the main screen;
(2) is a channel selection device, in which the input signal selected by the selection button (1) is tuned to a specific television broadcast signal by the tuner (3), and the input signal is tuned to a specific television broadcast signal by the tuner (3).
) (detected by 4 and supplied to the sub-screen forming circuit (5). This sub-screen forming circuit (5) is normally switched to a state in which the sub-screen is not displayed on the cathode ray tube (6). , the main screen is projected on the cathode ray tube (6).

(7) is a channel selection button for displaying a sub screen, (8) is a sub screen selection device, (9) is a sub screen tuner, (10)
is the VIF for the sub screen, and the video signal detected by the sub screen selection button from the VIF (10) is sent to the sub screen switching circuit (
11). The child screen video output signal of the child screen switching circuit (11) is supplied to the child screen synthesis circuit (5), and at the same time, the child screen switching signal a is supplied to the AND gate circuit (13). The other input terminal of the AND gate circuit (13) is
It is grounded through the resistor (16), but when the sub-screen "on" switch (15) is closed, the voltages a(t, o) are applied and output. Ant gate circuit (13)
The output of is supplied to one input of the OR gate circuit (12) to switch the small screen synthesis circuit (5) to the small screen display state. The other input terminal of the OR gate circuit (12) is connected to a timer (17), and is normally supplied with a logic "0" signal. The timer (17) is the input reservation time,
It memorizes reserved channels and has a clock function. Therefore, even if the sub-screen "on" switch (15) is open, when the timer (17) reaches the reserved time, the reserved channel will be selected from the sub-screen channel selection device (8). Then, the video signal of the reserved channel is generated by the small screen switching circuit (11), and is supplied to the small screen synthesis circuit (5), and the output of the OR gate circuit (12) is set to "1" to switch to the small screen display state. It is done like this. Therefore, according to this configuration, the reserved channel will be displayed on the sub-screen when the time reserved by the reservation timer arrives.

[Problem to be solved by the invention]

According to the two-screen television receiver on Unege, when the reserved program starts, the program you are currently watching will suddenly switch to the reserved program, so you will not miss important scenes. The reserved program will be displayed on the sub-screen even if you are not watching it.

The present invention has been developed in view of the above-mentioned problems, and its purpose is to enable a reserved program to be displayed on the main screen when the power of the television receiver is not turned on.

[Means to solve the problem]

As an example of the television receiver of the present invention is shown in FIGS. 1 and 2, the television receiver has a reservation timer (17) function and is configured to display a sub-screen within the main screen. In the television receiver, when the power (35) is turned on at the time reserved by the reservation timer (17) function, the reserved program is displayed on the sub screen, and when the power (35) is not turned on. If available, the reserved program is displayed on the main screen.

[Effect]

In the television receiver of the present invention, when the reserved time matches the current time, if the telephone number (35) is in the "on" state, the reserved channel program is displayed on the sub screen, and the power supply (35) is "on".
Since the reserved channel program can be displayed on the main screen in the "off" state, it is possible to eliminate the unnaturalness in which the reserved channel program is displayed on the sub screen when the power is not turned on.

〔Example〕

Hereinafter, the television receiver of the present invention will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a flowchart showing an embodiment of the television receiver of this example. Before explaining FIG. 1, the configuration of this example will be described in detail with reference to FIG. 2. In FIG. 2, only the video signal system is shown, and the audio signal system is omitted. Also, parts corresponding to those in FIG. 3 are designated by the same reference numerals.

In Fig. 2, the video signal radio waves caught by the antenna (20) are supplied to the main screen tuner (3) and the sub screen tuner (9), and are sent to the main screen tuner (3) and the sub screen tuner (9). (9) are controlled by phase-locked loop circuits (hereinafter referred to as PLL) (21) and (22), respectively. pt, t, (21),
<z2> is the central processing unit (hereinafter referred to as CPU)
(31), operating the parent or child screen selection button, channel selection button, reservation timer setting button, etc. from the keyboard (33) or remote controller (34);
For example, in the case of a remote controller (34), the light receiving element (32) → CPU (31) → PLL (22)
- A predetermined sub-screen channel program is selected via the sub-screen tuner (9).

Furthermore, when a channel selection is made using the keyboard (33), this selected channel signal is sent to the CPU (31).
-> PLL (21) -> Provided to tuner (3), and the main screen channel number is selected. The CPU (31) also monitors the "on" and "off" states of the power line (35) connected to the commercial power source (AC 100V). It also controls a controller (30) and has a built-in timer (17). The channel video signal selected by the main screen tuner (3) is amplified and detected by VIF +41 to obtain a composite signal, and the Y/C separation circuit (23) converts the carrier color signal which is a color component. The carrier color signal is further extracted to create a color difference signal, and the above video signal and color difference signal are added to convert the three primary color signals of red (R), green (G), and blue (B) into RGB. By creating the interface (24) and supplying it to the cathode ray tube (6), the main screen tuner (3)
) is displayed on the cathode ray tube (6).

On the other hand, the sub-screen channel signal selected by the sub-screen tuner (9) is made into a composite signal through the sub-screen VIF (36), and is supplied to the sub-screen selection button II (25). The composite signal from the sub-screen VIF (36) is supplied to the Y/C decoder (26), and the luminance signal Y
and color difference signals R-Y and B-Y. Although not shown,
It is converted into digital data by an analog-to-digital converter a (hereinafter referred to as A/D) (27) via a low-pass filter (LPF), etc., and the output data of the A/D (27) is converted into a picture input signal.・Picture (hereinafter referred to as PinP)
0 written in memory (28), luminance signal Y written in PinP memory (28), color difference signal R-
Y, B-Y are digital-to-analog converters (denoted as D/A') (29) D/A converted into analog signals.
The output of (29) is made into a composite signal via an LPF and an encoder (not shown), and the child screen is synthesized with the main screen at the RGB interface (24), and the cathode ray tube (6
) will be displayed.

A case in which the reservation timer function operates in the above configuration will be described.

Suppose that someone else or you press the timer reservation button on the keyboard (35) or remote controller (34) to select and set a predetermined channel to operate at a predetermined time.
When the set time and the current time match and the timer (17) of the CPU (31) goes into the "on" state as shown in the first step S'rs in FIG. 1, the CPIJ (31) goes to the second step ST2. As shown in the figure, it is determined whether the power source (35) is turned on or not.

If the power supply (35) is not turned on in the second step S'l"2, the power supply (35) is turned on as shown in the third step ST3, and the fourth step S'1" is turned on based on the reservation timer data. As shown in FIG. 4, the output signal of the main screen tuner (3) is displayed on the cathode ray tube (6) via the PLL (21) to reach the end. When the power (35) is turned on in the second step ST2, the CPU (31) determines whether the sub-screen is "on" as shown in the next fifth step ST5. , fifth step S'r
If s is YES"i?, the CPU (31) performs sub-screen channel selection using the reservation timer data as in the 6th step STs, and reaches the end. If the 5th step S'T's is NO, the 7th As shown in step STτ, the sub-screen is selected using the reservation timer data, and as shown in the eighth step STe, the sub-screen is turned on and reaches the end. If it is turned on,
When selecting a channel using the reservation timer, the channel selection operation is performed on the sub screen, eliminating the possibility of the channel being suddenly changed while watching the television screen.

Furthermore, if the power is turned off, when selecting a channel using the reservation timer, the channel selection operation is performed on the main screen, so there is no need to watch the reserved channel program displayed on the sub-screen as in the past.

However, it goes without saying that the present invention is not limited to the embodiments on the ridges, and that various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the present invention, when the power is turned on, the reserved program will not suddenly switch at the time of the reservation timer and you will not miss an important scene, and when the power is turned off, the reserved program will not be displayed unnaturally on the sub screen. It has the effect that a television receiver can obtain.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a flowchart showing an embodiment of the television receiver of the present invention, Fig. 2 is a system diagram showing an embodiment of the television receiver of the invention, and Fig. 3 is a flow chart showing an embodiment of the television receiver of the present invention. 1 is a system diagram of a conventional television receiver. (3), (91 is a tuner for the main screen and child screen, (6
) is a cathode ray tube, (17) is a timer, (25) is a small screen forming circuit, (31) is a CPU, and (35) is a power supply.

Claims (1)

[Claims] In a television receiver having a reservation timer function and displaying a sub-screen within the main screen, when the power is turned on at the time reserved by the reservation timer function, the above-mentioned A television receiver characterized in that a reserved program is displayed on a sub screen, and when the power is not turned on, the reserved program is displayed on a main screen.