JPS5812483A - Television receiver incorporated video tape recorder - Google Patents

Abstract

PURPOSE:To improve operability by obtaining a VTR reproduced picture by applying a signal from a VTR part to a TV part during reproduction, and confirming video recording contents by supplying the signal from the VTR part to the TV part in the beginning of video recording. CONSTITUTION:A reproduction operating signal is applied to an input terminal 21 to turn on a transistor TRQ1. Therefore, a TRQ2 turns off and a TRQ3 turns on to close a switch 29, thereby powering up and operating a TV part 28. Then, the collector potential of the TRQ1 drops to open the terminal S2 of a switch 30 and when a signal from a TV selecting circuit 26 is cut off, the collector potential of the TRQ2 rises to send a signal from a VTR part 25 to the TV part 28, obtaining a reproduced picture. During video recording, on the other hand, signals applied to terminals 21 and 22 turn on the TRQ1, turn off the TRQ2, and turn on the TRQ3 to connect the terminal S1 of the switch 30, thereby supplying the signal from VTR part 25 to the TV part 28. When the voltage across a capacitor C rises up to the turn-on voltage of a TRQ6, the VT part 28 is turned off to confirm video recording contents in the beginning of the operation.

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a television receiver (hereinafter referred to as TV) with a built-in video tape recorder (hereinafter referred to as VTR) that is easy to handle and has excellent operability.

Figure 1 is a diagram showing a conventional example of a TV with a built-in VTR.
Divider, 2 is a VTR section, 3 is a TV section, 4 is a VTR channel selection circuit, 5 is a TVV channel selection circuit, 6 is a VTR power switch, 7 is a TV power switch, 8 is an input selector switch for the TV section , 9 is the power input terminal, and 1° is the TV inside the VTR.

When recording using a TV with a built-in VTR configured as described above, first, the power switch 6 is turned on, and the TV broadcast selected by the channel selection circuit 4 is recorded on the VTR unit 2. If it is desired to check the recorded content on the TV screen, in addition to the above operations, it is necessary to conduct the power switch 7 and switch the TV section large input selector switch 8 to the VTRTR output signal side. Further, even when the contents recorded in the VTR section 2 are played back on the TV section 3, the operation is extremely complicated and has poor operability, as the VTRTR main playback operation and the same operation as described above are required.

The present invention aims to eliminate the above-mentioned drawbacks and provide a TV with a built-in VTR that is easy to operate.

The configuration of the present invention will be explained based on an embodiment shown in FIGS. 2 and 3. FIG. 2 is a block diagram showing the configuration of the present invention.
The same reference numerals as in FIG. 1 represent the same contents.

6z/fi VTR built-in 7Tv main power switch; 11 is a VTR section operation detection circuit and control circuit. In FIG. 2, when a recording or playback operation is performed on the VTR section 2, the operation signal is applied to the control circuit from the input terminal 12 to drive the switches 7 and 8, thereby switching the TV input signal and opening/closing the power supply. FIG. 3 is a specific circuit diagram of the operation detection circuit and control circuit 11 shown in FIG. 2. Hereinafter, operation signal detection and control operations will be explained in detail with reference to this diagram.

The lamp voltage shown in FIG. 4 is used as the operation detection signal. When this signal is, for example, the voltage across a VTR operation display LED, one signal shown in FIG. 4 is output during a VTR playback operation, and two signals are output during a recording operation. First, the operation during playback will be explained. A signal generated by the regeneration operation is applied to the artificial blade end 21 in FIG. 3 to make Q1 conductive. Therefore, Qz is cut off) Qs is made conductive and the switch 29 is closed and the TV section 28 is turned off.
is supplied with power and becomes operational.

On the other hand, since the collector potential of Qt becomes low, the switch 30
The terminal S2 of is opened, and the signal from the TVVT channel selection circuit 6 is cut off. Since the collector potential of Qz becomes high, switch 30
The terminal Sl is closed and the signal from the VTR section 25 is transmitted to the TV section 28.
, and a VTR playback image is obtained. Next, the operation during recording will be explained.

During recording, signals shown in FIG. 4 are applied to input terminals 21 and 22. Therefore, as before, Q1 conducts, Qz shuts off, Q3 conducts, switch 29 closes, and switch 3
The 0 terminal Sl is conductive, and the signal from the VTR section 25 is supplied to the 15TV section 28. As with most current VTRs, during recording, the output of the VTR becomes a recording content signal, which is monitored by the TV section 28. Also Q
4 Conduction, Qs L and disconnection, so capacitor C is charged through R. Eventually, when the voltage across the capacitor reaches the conduction voltage of Qs, Qs becomes conductive and Q! The collector potential of T is low, Q3 is cut off, switch 29 is opened, and T
The V section 28 is turned off. In this way, the recorded content can be confirmed only at the beginning of the recording operation.

By appropriately selecting C and R, the time for checking the recorded content can be set freely. The switch 31 is set to T during the above recording.
This is used when the TV is turned on again after being turned off. When this switch 31 is made conductive, 93
is always conductive and fiTV is always on. If there is no need to automatically turn off the TV during recording, the circuits Q4 to Q6 can be omitted.

By configuring the present invention as described above, the VTR
The built-in TV is extremely easy to operate and has excellent handling.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional example, Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is a specific circuit diagram of one embodiment, and Fig. 4 shows an operation signal. FIG. 1...Distributor, 2...VTR section, 3...TV section,
4... VTR tuning circuit, 5... TV tuning circuit,
6...VTR source input terminal, 10...TV with built-in VTR
, 11...VTR section operation detection circuit and control circuit, 12
...Input terminal, Ql-Qs...Transistor, 25
...VTR section, 26...TV section selection circuit, 28...
・TV section, 29-31...switch.

Claims (1)

[Claims] A device in which a video tape recorder and a television receiver are integrated, which includes a circuit that detects the recording operation and playback operation of the video tape recorder, and a circuit that detects the recording operation and playback operation of the video tape recorder, and converts the input signal to the television receiver from the television broadcast signal to the video tape using the detected signals. A television receiver with a built-in video tape recorder, characterized in that it includes a circuit that switches to a recorder playback signal and at the same time opens and closes the power supply of the television receiver.