JPS63276983A - Television receiver - Google Patents

Abstract

PURPOSE:To prevent temporary muting of picture and audio output by comparing a reception channel and a reserved channel at the arrival of a timer time so as to control the channel change. CONSTITUTION:When a timer 41 reaches a set reservation time, the program control is executed by a microcomputer of a system controller 30, a power contact 54 is closed and while the contact 54 is closed, the control is kept as it is. Then the reception channel selected by a tuner 11 is compared with the reserved channel stored in the controller 30 through the selection by switches 3A-3N, the muting of the audio and picture signals is applied only at dissidence and the channel switching is applied succeedingly, and those operations are not applied at the coincidence. As a result, in observing the reserved channel, the discontinuous output of the picture and audio output is prevented even when the timer expires.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a television receiver.

[Summary of the invention]

This invention prevents screen and audio disturbances from occurring in a television receiver by performing predetermined control processing when a timer reservation time has arrived.

[Conventional technology]

A television receiver having a timer reservation function will be explained using FIG. 1 as follows.

That is, in the figure, (11) indicates an electronically tuned tuner circuit, in which a predetermined channel is selected in accordance with the channel selection signal CHNL, and the video intermediate frequency signal and audio intermediate frequency signal of the channel are selected. A frequency signal is extracted.

The video intermediate frequency signal is then supplied to the video detection circuit (13) through the video intermediate frequency amplifier (12) to extract a color video signal, and this signal is supplied to the Y/C processing circuit (14). This signal is used as a primary color signal, and this signal is supplied to a color picture tube (15).

Also, the audio intermediate frequency signal is transmitted to the audio intermediate frequency amplifier (22).
The audio signal is supplied to the audio detection circuit (23) through the amplifier (24), where the audio signal is extracted, and this signal is supplied to the speaker (25) through the amplifier (24).

Furthermore, (30) shows a system controller configured by a microcomputer, and this Syskov (30)
) has various operation switches operated by the user (
3A) to (3N) are connected, and the timer circuit (
51) are connected, and these switches (3A) to (3N)
Control signals CHNL, CHNL, are sent from the system controller (30) in response to the operation of
MUTE and POWR are output, and these signals are supplied to the respective circuits.

In addition, (51) is a power plug that is supplied with commercial AC voltage, and (52) is a power plug that is supplied with a predetermined DC voltage Vd from the commercial AC voltage.
A power supply circuit (53) represents a relay, and this relay (53) is controlled by a system controller (30). Then, the voltage Vd from the power supply circuit (52) is applied to the system controller (3).
0) and the timer circuit (41) as their operating voltage, and the normally open contact (
54) and remaining circuits (11) to (14),
(22) to (24) as their operating voltage.

Then, when the power switch among switches (3A) to (3N) is turned on, a signal PO from the system controller (30) is output.
When WR becomes "H", the relay (53) is driven and its contact (54) is turned on, and the voltage Vd is applied to the circuit (11).
) to (14), (22) to (24),
The television receiver is in a power-on state.

Also, at this time, data (last channel data) indicating the channel that was being watched until the power was turned off is taken out from the system controller (30), and this data is sent to the tuner circuit (last channel data) as the tuning signal CII N L. 11)
The tuner circuit (11) selects the channel that was being watched until the power was turned off.

In addition, until the tuning becomes stable, the circuit (14) is muted by the muting signal MUTH from the system controller (30).
, (24) muting is performed.

Then, when the power is on, switches (3A) to (
When the channel switch of the tuner circuit (1N) is operated, the signal CHNL changes accordingly, and the tuner circuit (1N) changes accordingly.
In step 1), a desired channel corresponding to the operation of the channel switch is selected.

Also, when the power switch among the switches (3A) to (3N) is turned off, the signal POWR becomes "L", the relay (53) is no longer driven, the contact (54) is turned off, and this TV receiver is turned off. is in a power-off state.

Note that when the power is turned off, data indicating the channel being viewed at this time (last channel data) is stored in the system controller (30).

Furthermore, when one of the switches (3A) to (3N) related to timer reservation is operated, data indicating the time when the power is turned on and data indicating the channel to be selected at that time are stored in the system controller (30). That is, timer reservation is performed.

Then, when the time reserved by the timer arrives, the power is turned on in the same manner as when the power is turned on, and the channel reserved by the timer is selected.

[Problem that the invention seeks to solve]

By the way, when tuning is performed in the tuner circuit (11), the screen and audio are muted by the i signal MUTH.

ii The tuner circuit (11) performs tuning by the signal CHNL.

1ii When the AFT circuit becomes stable, muting of the screen and audio is canceled by the signal MUTE.

This process prevents noise from appearing on the screen or in the audio during channel selection.

For this reason, problems may occur if you watch TV while making a timer reservation.

That is, it is assumed that the Nth channel from time T is currently reserved by a timer. Even though the timer is reserved in this way, if you have been watching the Nth channel since before time T, when time T comes, even if you are watching the Nth channel, the Nth channel will start again. The channel will be selected.

During this channel selection, the above-mentioned processes 1 to 111 are performed, so the screen and audio are temporarily interrupted.

This invention attempts to solve these problems.

[Means for solving problems]

This invention has a timer reservation function, and when the timer reservation time arrives, the channel being received at this time and the timer reservation channel are compared,
This television receiver changes the receiving channel to the timer reserved channel only when the comparison results are not equal.

[Effect]

Even if you watch the timer-scheduled channel at the timer-scheduled time, the screen and audio will not be interrupted.

〔Example〕

The hardware is configured as shown in FIG. 1 and as described above, and the ROM of the microcomputer constituting the system controller (30) is provided with the routine (100) shown in FIG. 2, for example. and this routine (1
00) is executed when the timer reservation time comes.

In other words, when the timer reservation time arrives, the system controller (30)
The processing starts from step (101) of the routine (100), and in step (102) PO
WR- becomes "H" and the contact (54) is turned on. Therefore, if the power is off at the timer reservation time, it will be turned on, and if it is already on, the on state will continue.

Subsequently, the process proceeds to step (103), and in this step (103), it is determined whether the current channel selected by the tuner circuit (11) is a reserved channel or not, and if it is not a reserved channel, the process is continued. The process proceeds to step (104), and in this step (104), the tuner circuit (11) is tuned to the channel reserved by the timer in response to the signal CHNL. Note that at this time, the processing of terms i, w, and iii is also performed.

Then, the process starts from Stellaf (104) and steps (
41 (105), and this routine (100) is ended.

Furthermore, if the channel currently being received is equal to the reserved channel in step (103), the process ignores step (104) and proceeds to step (105), ending this routine (100).

〔Effect of the invention〕

In this way, according to the present invention, when the timer reservation time arrives and you are watching the timer reservation channel, the channel selection process for that channel is ignored. You can enjoy the TV broadcast as is without being temporarily muted.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of the present invention, and FIG. 2 is a diagram for explaining the same. (11) to (15) are video signal systems, (22) to (25)
1 is an audio signal system, (30) is a system controller, ) is a timer circuit, and (52) is a power supply circuit. Hidemori Matsukuma's complete 44.0 times residence, Figure 1, Flow 1,000 Yards, Figure 2

Claims (1)

[Claims] It has a timer reservation function, and when the timer reservation time comes, the channel being received at this time and the timer reservation channel are compared, and if the comparison result is equal. A TV receiver that changes the channel being received to the channel reserved by the above timer only when the channel is not available.