JPH083537B2 - Clock display - Google Patents

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention is a display content when a device having a clock function such as a video tape recorder (VTR) and a television receiver (TV) is used in combination. The present invention relates to a switchable timepiece display device.

(B) Conventional technology A normal VTR has a built-in clock function for scheduled recording, and the time is always displayed on the front panel display. However, at the time of power failure, the clock display is turned off and only the clock is counted by the back-up battery, so that the clock does not get out of order in a power failure of several minutes to several tens of minutes. By the way, TVs have also become high-value-added, and the magazine "TV Technology" 1984 1
As disclosed in the February issue, P23 to P24, those with a built-in clock function are costly. When using such a TV and VTR in combination, as shown in Fig. 4, the TV (51) and VTR (52)
And are connected by a video signal cable (53) and an audio signal cable (54), and the video and audio signals reproduced by the VTR are displayed on the TV.

(C) Problems to be solved by the invention As described above, when a TV with a clock function and a VTR are used in combination, separate clock circuits work simultaneously on both the TV and VTR. The clock displays of the two do not always match, which causes the user to feel uncomfortable. Also,
The backup time will vary depending on the device during a power failure, so
There is a problem in that the clock continues to operate normally or goes crazy due to a power failure, and the clock display operation of each device does not match.

(D) Means for solving the problem When the devices each having a clock function are used in combination, while one device emits the time data,
The other device is characterized by performing time display by using the time data instead of the data of its own clock circuit.

(E) Operation Since the apparatus is configured as described above, the date / time display is the same among the devices, and the clock operation is the same between the devices even during a power failure.

(F) Example Hereinafter, one example of the present invention will be described with reference to the drawings. FIG. 1 is a circuit block diagram of the apparatus of this embodiment.

The VTR main body (1) has a clock circuit (3) which is constantly driven by a power supply circuit (2), a recording operation means (4) for inputting recording reservation information, a memory (5) for storing recording reservation information,
The comparison circuit (13) compares the first time data indicating the actual time from the clock circuit (3) with the recording reservation information in the memory (5), detects the arrival of the reservation time, and selects the channel selection circuit (6). Video of a predetermined broadcast channel due to the tuning voltage generated by the reservation execution circuit (8) for supplying the channel selection information and the recording information to the syscon circuit (7) and the channel selection circuit (6) for inputting the channel selection information. A tuner for deriving a signal (9),
A recording circuit (10) for recording a video signal by inputting a recording command output derived from a syscon circuit (7) for inputting recording information, and a reproduction circuit (11) for reproducing the video signal,
A display circuit (12) for displaying the first time data and the recording reservation information, and a power switch for controlling the supply of the power voltage to each circuit other than the clock circuit (3) and the display circuit (12) are arranged. . The first time data from the clock circuit (3) is output to the terminal (14), and the reproduction circuit (1
The video and audio signals reproduced in 1) are output.

The TV body (16) has an input data discriminating circuit (18) for discriminating the presence / absence of time data input from the terminal (17), and a TV.
Is always driven by a power supply circuit (not shown) on the side
The fixed contact (20) is switched by a clock circuit (clock means) (19) for outputting the second time data which is a real time independent of the time data, and the output of the input data discrimination circuit (18).
The time data from the outside is shown in a), and the second data is shown in the fixed contact (20b).
Time data is output and the movable contact (20c) is monitored (2
The switch circuit (selection means) connected to 1), the monitor (display means) (21) for displaying the time data output from the switch circuit (20), and the tuning voltage generated by the tuning circuit (22). A tuner (23) for deriving a video signal of a predetermined broadcast channel is arranged.
The playback video signal input to the terminal (24) is the tuner (23).
It is displayed on the monitor (21) as well as the output.

On the monitor (21), time data is displayed on-screen on the screen formed by the output of the tuner (23) and the reproduced video signal. The terminals (14) and (15) can be connected to the terminals (17) and (24) by cables (30) and (31), respectively. Further, although only the video signal is described in the present embodiment, the audio signal is the same as a normal VTR like the video signal.
The signal is processed as follows.

FIG. 2 shows a state in which the VTR (1) and the TV (16) are connected by the time data cable (30), the video signal cable (31), and the audio signal cable (32). When the terminals (14) and (17) are connected by the cable (30) as shown in FIG. 2, the first time data from the clock circuit (3) is input to the input data determination circuit (18), It is judged that there is data ”, the movable contact (20c) is switched to the fixed contact (20a) side,
The first time data is input to the monitor (21), and the time display corresponding to the first time data is displayed on-screen at a predetermined position formed by the output of the tuner (23) or the reproduced video signal. It

Explaining the case where both VTR (1) and TV (16) are in the power failure state, if the power failure is within the power failure compensation period, the display circuit (12) and the monitor (21) will not display,
Clock circuits (3) and (19) are in operation, and the first time data is TV
Continues to be input in (16). Therefore, after the power failure is released, the first time data is displayed on the monitor (21). When the power failure compensation period is exceeded, the clock circuit (3) (19) does not operate normally, and after the power failure is released, the monitor (21) blinks θθ: θθ, and there is a power failure condition, and the clock circuit (3) ( It indicates that the preset of 19) is necessary. If there is a gap between the VTR and the TV during the power outage compensation period, for example, the VTR is the TV
If it is shorter than, the second time data is selected by the switch circuit (20) after the VTR compensation period ends, and if it is longer, the first time data continues to be selected. That is, the time display device can set the power failure compensation period on the longer side of the VTR and the TV.

The cable (30) is removed. That is, terminal (14) (1
If the connection between 7) is not made, the first time data is not input to the input data discrimination circuit (18), it is determined that there is no data, and the movable contact piece (20c) is fixed contact (20b). )
The second time data is input to and displayed on the monitor (21).

Fig. 3 shows a flow chart of the above-mentioned circuit operation. In this flow chart, the "power failure indication" of the block (40) means the monitor (21) of the TV (16) after the power failure. Indicates that a blinking display is performed.

In the device of this embodiment, the input determination of the first time data associated with the attachment / detachment of the cable (30) is performed by the input data determination circuit (18).
Although it is done electrically, it is needless to say that it is possible to make a mechanical determination.

(G) Effect of the Invention As described above, according to the present invention, when the devices each having the clock function are used in combination, the deviation of the clock display between the devices is eliminated, and the power failure compensation period is set to the maximum among the devices. Since it can be adjusted for a long time, a device with long blackout compensation can be realized. In addition, the time that is the reference time for the VTR reservation operation, that is, the current time of the VTR clock means, is displayed on the TV monitor that the user is always paying attention to. The user can easily find the setting error (delay or advance of the display at the correct time).
If the user can detect an error in the time setting of the clock means of the VTR, the user can correct this time setting, and the VTR is useful because the reserved recording can be correctly executed under the correct time setting.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention. FIG. 1 is a circuit block diagram, FIG. 2 is a state explanatory diagram, FIG. 3 is a flow chart, and FIG. 4 is a state explanatory diagram of a conventional example. Is. (1) …… VTR, (16) …… TV, (18) …… (input) data discriminating means, (19) …… clock circuit (clock means), (2
0) ... Switch circuit (selection means), (21) ... Monitor (display means)

Claims (1)

[Claims] 1. A first clock means for outputting a first time, a first display means for displaying the first time, a reserved time stored, and a reservation operation managed by comparison with the first time. A VTR equipped with a reservation device, a second clock means connected to the VTR for outputting a second time, a monitor for displaying the second time, and a judging means for judging the presence or absence of the first time. When the determination means determines that the first time is present, the same time as the display of the first display means of the VTR is displayed on the monitor of the TV regardless of the presence or absence of the second time. Clock display device characterized by displaying