JPS617731A - Television receiver - Google Patents

Abstract

PURPOSE:To enable the reception of video signals during only a time period set in a counter so as to eliminate abuses of thoughtless watching television for a long time, by providing a time integrating counter which operates only when the power supply is on. CONSTITUTION:A ROM22, RAM23, and I/O port 24 are provided in the control circuit of a television receiver and the command signal of a commander is inputted in the input side of the I/O port 24. Moreover, keys 28 and 29 inside the TV receiver main body are connected with the input side of the I/O port 24. A synchronizing pulse to a timer in a CPU21 is supplied through the keys 28 and 29 and a power supply synchronizing pulse is formed at a pulsing circuit 38 by supplying an AC signal from an AC source and supplied to the I/O port 24. The data are fetched by the ROM23 through the CPU21. Then input of video signals is enabled during only the time period when the power supply is on by means of the timer in the CPU21 so as to eliminate abuses of throughtless watching of television for a long time by users.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a television receiver having a timer program function that allows the user to arbitrarily set the time during which a broadcast program can be viewed.

BACKGROUND TECHNOLOGY AND PROBLEMS With the spread of television receivers in recent years, opportunities to watch television broadcasts over a long period of time have increased. However, watching TV for too long is not desirable.

From this point of view, recently some television receivers have been equipped with a microcomputer to provide a function to automatically turn off the power after a predetermined period of time under microcomputer control. However, since this receiver generally records the on time and off time of the receiver, it is effective only while the timer is operating, and the timer off function does not operate when the power is turned on manually.

In order to avoid carelessly watching television for a long time, it is necessary to disable the timer-off function regardless of whether the power is turned on manually or automatically.

OBJECT OF THE INVENTION Therefore, it is an object of the present invention to propose a television receiver that can avoid the trouble of watching television carelessly for a long time.

SUMMARY OF THE INVENTION Therefore, in the present invention, a time integration counter that operates only during the period when a television image is displayed is provided in the television receiver, and the counter value can be arbitrarily set. The video signal is allowed to be received only during the specified time.

According to this, when the time set on the counter arrives after the television receiver is turned on, the power to the television receiver is automatically turned off, so that users may inadvertently watch television programs for a long time. situations can be avoided.

Embodiment Next, a first example of a television receiver according to the present invention will be described.
As will be explained in detail with reference to the figures below, the present invention is equipped with a microcomputer to achieve a timer program function, and in addition to these timer program functions, a function for displaying the current time, etc. is also added. This is a case where it is applicable to a television receiver.

Therefore, in this invention, the basic image is a television image, and the image to be replaced with or superimposed on this television image is a channel reservation image.
In addition to the IS image for a clock, other images may also be displayed on the same picture tube surface (CRT tube surface).

FIG. 1 shows an example of a television receiver according to the present invention, where ill is a tuner, (2) is a video intermediate frequency amplification circuit, (3) is a video detection circuit, (4) is a video output circuit, and (4) is a video output circuit.
5) is a picture tube (CRT), (6) is an audio intermediate frequency amplification circuit, (7 is an output amplifier, () is a speaker, (9) is a horizontal and vertical deflection circuit, and (11) is a This is the deflection system. (12) is an electronic tuning circuit, (13) is a decoder that receives remote control signals and channel selection signals inside the receiver;
14) is a channel selection voltage forming circuit, and (15) is a PLL that receives this selection voltage. In addition, a decoder (13
) is supplied to the control circuit (17) of the AC power supply. (1B) is a light receiving element for remote control signals.

Further, (20) is a control circuit having a program timer function for image display and a power supply synchronized hour hand timer function, and its main body is a microcomputer. A CRT control circuit (25) with a built-in character generator operates in response to a command from the control circuit (20). The CRT control circuit (25) outputs red to blue characters (
signals SR, SG, SR containing symbols are generated. A blanking signal BLK for erasing the television image is further sent from the control circuit (20) to the video output circuit (4), and if necessary, an audio signal is sent so that a buzzer sound will sound at the end of a specific key operation. A control signal SA is sent to the audio control circuit (27).

The AND circuit (19) is for inhibiting input of a remote control signal by means of a pulse P when a control signal is being sent from the control circuit (20) to the electronic tuning circuit (12).

(28) is the mode switching key provided on the receiver body, in this example, the PPC (programmable
pCenter) key, and (29) is a timer key that can turn on and off the reservation timer, whose command data is taken into the CPU via the I10 port provided in the control circuit (20).

FIG. 2 shows an example of the control circuit (20), which includes a CPU (21), ROM (22),
It has RAM (23) and I10 boat (24), and I1
A remote control signal from a commander, which will be described later, is input from the input port side of the 0 port (24), and a key (2B), <29) inside the receiver body is also connected.

A commercial AC source (50/60Hz) is then used to supply synchronization pulses to the clock timer of the CPU (21).
The commercial AC signal from (37) is converted into a pulse circuit (38)
is supplied to form a power synchronization pulse.

When the commercial AC source is switched, the power synchronization input data at that time is taken into the RAM (23) and the clock timing of the clock timer is changed.

FIG. 3 shows an example of the key layout provided on the commander (30). The commander (30) is used for channel selection, power on/off, etc., as well as for presetting the above-mentioned current time. Among the multiple keys, (31) is a channel direct selection key, the PCC key is a mode switching key with the same function as the one provided on the main unit, and (32)
), (33) is "+".

The "-" key, (34) and (35) are left and right shift keys. (36) is a pencil-shaped clock start key.

In this invention, the power of the receiver is turned on, the time during which the TV image is actually displayed is accumulated, and when the accumulated time reaches a preset time, the power of the receiver is turned off. This is how it was done.

If the function of turning off the power of the receiver after the integration time has elapsed is hereinafter referred to as the power block function, the display mode for setting the power block can be selected using the above-mentioned PPC key, and the power In the block set mode, an image as shown in FIG. 4, for example, is displayed on the CRT screen in place of the television image.

In this example, three types of power supply blocks can be selected. The aspects of the power supply block are selection of the day of the week and selection of off time. The example shown in the figure is a case where the preset is set so that TV broadcasts can be received for only two hours every day (ALL), and after that, the power supply is blocked.

An example of realizing the functions of such a power supply block will be described with reference to the flowchart of FIG. 5. That is, FIG. 5 is a flowchart showing an example of power supply block operation according to program data written in the ROM of the control circuit (20).

When the program starts, the program moves to the main processing routine in step 40, in which the remote control data, key manual data in the receiver body, power synchronization input for the clock timer formed using a commercial AC source, etc. are checked in I1.
The ROM (
22), and processes for realizing other display modes such as channel reservation are also performed.

Next, in step 42, the presence or absence of remote control input is checked, and if there is remote control input, step 743
The data contents are decoded in the RAM (23) and the decoded contents are written into the RAM (23). Next, in step 44, the on/off state of the power of the receiver is checked, and if it is off, it is determined in step 45 whether or not the power is currently blocked. When the block is in progress, the commander (30
), the presence or absence of remote control input for power-on is checked, and if there is remote control input, the program 7 flag is reset in step 47, and in step 48
In this step, a flag is set to turn on the receiver power.

Then, in step 49, the power of the receiver is turned on again.
The off state is checked, and if the on state is not turned on even though the on flag is set in step 714, the presence or absence of the on or off state of the main power switch is checked in step 50, and the main power switch is turned on. If so, the receiver power is finally turned on in step 51 and the process returns to main processing step 40.

If the receiver power is off and the power supply is not blocked, this is checked in step 45 and the process moves to step 49.

Here, if it is checked in step 44 that the receiver power is on, the process moves to step 52, where it is checked whether or not the PPC key among the remote control inputs has been pressed, and if it has been pressed, the step At 53, switching to the next display mode is performed. On the other hand, if there is human power on keys other than the PPC key, it is determined in step 54 whether there is any human power on keys other than the key, and if there is human power on these keys, the power supply block is set to the set mode in step 55. If it is not the power supply block set mode, the process moves to step 56 and switches to another display mode. If it is the power supply block set mode, the process moves to step 57 and r+J
Block data is input using the +'r-J keys (32), (33) and shift keys (34), (35), and the input data is displayed on the CRT screen (see FIG. 4).

Then, in the next step 58, the time integration counter is cleared, and in step 50, it is determined whether or not block data has been set. If it has been set, in step 6o, the specified date of the block data is If it is not the specified day, the process moves to step 61 where the time accumulation counter is cleared.

On the other hand, if it is the designated day, the time integration counter is activated in step 62.

As is clear from the check operation in step 44, this time integration counter operates only when the power is on. next,
In step 63, it is checked whether the integrated value is the set value, and if it is still not greater than the set value, in step 64, it is checked whether the integrated value is within a predetermined time remaining. be done. In this example, it is checked whether there are five minutes remaining, and if there are less than five minutes remaining, an image for preview display is superimposed on the television image in step 65.

The preview display is, for example, a display indicating that the block will be avoided in five minutes.

The reason why such a notice is displayed is because if the TV suddenly turns off when the block time arrives, the user may be mistaken as thinking that the receiver is malfunctioning. Therefore, we display in advance that the block time has arrived, and confirm it. This is to make it happen.

When the preview is displayed, the flag indicating that the preview is being displayed is set in step 66, and then the process moves to step 49.Next, if there are 5 minutes remaining in step 64, or if there are not 5 minutes remaining, the process proceeds to step 64. The process moves to step 67, where it is checked whether or not the preview is being displayed. If the preview is being displayed, the operation of the preview display time counter is started in step 68, and it is checked in step 69 whether or not the preview display time has ended, and the preview is displayed. If it is the display end time, the preview display is erased in step 70. Further, if the preview display is not being displayed in step 67, the television image is displayed as is, and if the preview display is not finished in step 69, the preview display state is continued.

Then, in step 63, the loading value of the time integration counter is set to a value (for example, an integrated value corresponding to 2 hours).
If this is the case, the time integration counter is cleared in step 71, and an off flag is set to turn off the receiver power in step 72.
This causes the block flag to be sent in step 73. Then, in step 75, it is checked whether it is the end of the specified day (power block date), and if it is the end, the block flag is set in step 7.
It is reset at 6. If it is not the specified day, the process directly proceeds to the main processing routine 40.

In this way, in this invention, the block time, that is, the time after which the television receiver is turned off manually or automatically, can be arbitrarily determined, so that the block time can be set as desired. When the TV arrives, the TV receiver can be automatically turned off. Therefore, it is possible to eliminate the harmful effects of watching television for a long time carelessly. Furthermore, in this embodiment, just before the block reservation time arrives, it is possible to superimpose on the TV image that the block reservation will be executed soon, so the user can visually confirm that the block reservation is approaching. This eliminates user confusion.

As described in detail, according to the present invention, a time integration counter is provided and the video signal is allowed to be received only for the time set by the counter, so that the user may inadvertently spend a long time. It is possible to reliably prevent the harmful effects of watching TV over and over again.

In addition, in the case where a notice of the arrival of the block time is displayed on the TV image immediately before the block reservation time arrives as in the embodiment, the user is less confused even if the power suddenly goes out, and misunderstandings can be avoided. has.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an example of a television receiver according to the present invention, Fig. 2 is a system diagram showing an example of a control circuit, Fig. 3 is a system diagram showing an example of a commander key arrangement, and Fig. 4 is a system diagram showing an example of a commander key arrangement. FIG. 5, which is a diagram showing an example of power supply block display, is a flowchart for explaining the operation of the present invention. (20) is a control circuit, (25) is a CRT control circuit, SR
""'SB is a character signal. Hidemori Matsukuma, (Pa.

Claims (1)

[Claims] A television receiver having a timer program function, which is equipped with a time integration counter that operates only while the power is on, and allows reception of video signals only for the time set by this counter. .