JPS6017272B2 - television receiver - Google Patents

Description

[Detailed Description of the Invention] The present invention allows you to watch videos from two different channels (main program and hair program) at the same time, and when necessary, you can mainly watch videos from one channel (bag program). It is an object of the present invention to provide a television receiver suitable for application in any desired case.

Recently, television programs have been enriched and diversified, and VTRs and video games have become widespread, and the demand for viewing two or more television images at the same time is increasing.

For this reason, a television receiver has been proposed in which a small insertion screen (Kei program screen) is displayed at the corner of the standard screen (listed program screen). In this Rhihime, the counter program screen is played back in synchronization with the scanning of the main program screen, so an analog memory such as a BBD is required, and the configuration for controlling it is complicated. Also, although the vertical and horizontal directions of the counterprogram screen are compressed to, for example, 1/4,
Since the scanning lines are the same as the standard screen, the number of scanning lines on the diamond program screen is reduced (50 lines in one field), and the image quality is poor. However, it is difficult to see the 4-gonahishi program screen because it is viewed at the same position as the main program screen. Furthermore,
The current program screen is obstructed by the reverse program screen, and it is difficult to perform separate remote controls for the current program screen and the hair program screen. Other devices that allow viewing two different screens simultaneously include a relatively large television receiver and a small black and white cathode ray tube incorporated into the same cabinet.

In this case, there is no need to synchronize scanning between the current program screen and the alternate program screen. However, it also has the disadvantages that the screen is small and difficult to see from a distance, and that it is difficult to perform separate remote operations. Also, it would be wasteful to provide a separate cathode ray tube just for broadcast programs. If the television receiver according to the present invention is applied to the case where two different screens are viewed at the same time, the above-mentioned drawbacks can be eliminated.

An example of the use of a television receiver according to the invention is shown in FIG.

The television receiver 1 is a portable type having a small (for example, 3 to 4 inch) black and white cathode ray tube 2, and a desired channel can be selected by operating a manually operated channel selection switch group 3 such as a push-down switch. It is possible to receive broadcasts in the evening. This television receiver 1
For example, a remote control signal that specifies the same channel as that specified by the channel selection switch group 3 is formed according to the state of the channel selection switch group 3, and only when the command switch 4 is pressed. It has a built-in transmitter that sends this remote control signal to the outside. The remote control signal is emitted from a converter 5 (speaker, infrared light emitting diode, etc.) provided in a part of the cabinet of the television receiver 1. In this case, the support member of the converter 5 is configured to be rotatable, so that the sending direction of the remote control signal can be changed to a desired direction. 6 is a color television receiver having a relatively large (13 inches or more) color cathode ray tube 7.

This color television receiver 6 is provided with a channel selection switch group 8, and a converter 9 (microphone,
Channel switching is controlled by a remote control signal that reaches a photodiode (photodiode, etc.). Then, the user can keep the television receiver 1 at hand and view the alternate program screen on the television receiver 1 by operating the channel selection switch group 3 regardless of the main program screen displayed on the color television receiver 6.

Now, if the user wishes to view the alternate program screen on the color television receiver 6, the user only has to press the command switch 4. As a result, a predetermined remote control signal is sent from the converter 5 to the converter 9, and the same screen as that on the television receiver 1 is displayed on the color television receiver 6. FIG. 2 shows the configuration of an embodiment of the television receiver 1. As shown in FIG.

10' shows an electronic tuning tuner using a variable capacitance diode as a tuning element, and a video signal system consisting of a video intermediate frequency amplifier 11, a video detector 12, and a video amplifier 13 is connected to the tuner. A video signal from an amplifier 13 is applied to a cathode ray tube 2.

Note that the audio signal system is omitted. terminal 14
By applying a tuning voltage of a predetermined level to the tuner 10, its reception frequency is determined.

The tuning voltage is formed by n tuning switches S, ~Sn, which constitute the tuning switch group 3, and n variable resistors VR, ~VRn, whose values are preset. When turned on, a tuning voltage corresponding to one channel is generated from the variable resistor VR. 15 indicates a transmitter for distance operation. The channel selection switch group 3 is also used for remote control of channel switching, and when the channel selection switches S, ~Sn of the channel selection switch group 3 are turned on for the transmitter 15, a voltage of 0 [V] is generated. A signal is supplied. Further, a command switch 4, a power on/off switch 16, a volume increase switch 17U, and a volume decrease switch 17D are provided in association with the transmitter 15. A converter 5 is connected to this transmitter 15. For example, the frequency is different depending on the function of channel switching, power on/off, volume increase, and volume decrease, and for each function, a remote control signal with a different pulse width depending on a predetermined control is sent to the converter 5. is fired from. The command switch 4 is configured to either control the generation and disappearance of remote control signals for all functions, or to control the generation and disappearance of only remote control signals for channel switching control. . In the latter case, even if the command switch 4 is off, controls other than channel switching can be remotely controlled by operating each switch on the television receiver 1 at hand. A command switch 4 can be provided at a location where the continuation of power supply to the transmitter 15 is controlled. In addition, as shown in FIG. 2, a power on/off switch 16, volume adjustment switches 17U, 17D
Instead of providing the channel selection switch separately from the channel selection switch, a predetermined plurality of the channel selection switches S, to Sn may be turned on at the same time. Further, an example of the color television receiver 6 is shown in FIG.

However, in FIG. 6, the color signal system is omitted for simplicity. A video intermediate frequency amplifier 19, a video detector 20, and a video amplifier 21 are connected to an electronic tuning tuner 18, and a color cathode ray tube 7 is connected to the video amplifier 21, and a color signal is transmitted to its cathode or grid (not shown). is applied.

Reference numeral 22 denotes an audio intermediate frequency amplifier, to which an audio detector 23, a low frequency amplifier 24, and a speaker 25 are sequentially connected.

The low frequency amplifier 24 is configured as a variable gain control amplifier. Variable resistor VR whose value is preset
, -VRn is applied to the tuner 18 from the terminal 26.

In order to selectively generate a predetermined tuning voltage, a tuning switch group 8 is provided in association with the channel selection circuit 27, and a channel switching control signal separated by the control function separation circuit 28 is sent to the channel selection circuit 27. V is supplied. The signal corresponding to the remote control signal obtained from the converter 9 is amplified and detected by the receiver 29 and then applied to the control function separation circuit 28, where its frequency, pulse width, etc. are discriminated and the signal is converted into the above-mentioned channel switching control signal. is formed. Channel switching is performed remotely using a direct channel selection method rather than a sequential channel selection method. In addition, the control function separation circuit 2
A power on/off control signal appears at the other output terminals 8, and a volume increase signal and a volume decrease signal appear at the output terminals 31U and 31D. The T-type flip-flop 32 is inverted by the power on/off control signal, and the output of the flip-flop 32 controls the on/off state of the relay contact 33. A television receiver power supply circuit 34 that is connected to the commercial power supply 35 only when this contact 33 is turned on.
T and a remote control power supply circuit 34R that is always connected to the commercial power supply 35 are provided, and the power supply (10&) appearing at the output of the remote control power supply circuit 34R is used as a relay power supply for power on/off control. It will be done. Volume increase and decrease control is achieved by supplying addition and subtraction inputs from the pulse generator 37 to the addition and subtraction counter 36, and by using AND gates 38U and 3.
This is realized by controlling the volume increase signal and volume decrease signal using the 8D, and converting, for example, a 4-bit output of the counter 36 into a gain control voltage using the DA converter 39. The configuration of the color television receiver 6 shown in FIG. 3 is the same as that of a normal remote-controllable color television receiver, so it can be operated by a remote control signal from the remote control transmitter 40. It is something.

The remote control transmitter 401 is provided with a channel selection switch group 41, a power on/off switch 12, a volume increase switch 43U, and a volume decrease switch 43D, and is configured to transmit a remote control signal from a converter 44. As can be understood from the above description of one embodiment of the present invention, the present invention has two embodiments.
When applied to viewing programs on two different channels at the same time, it is possible to eliminate the drawbacks of counterfeits that insert small screens in the corners of the screen or incorporate small cathode ray tubes in the same cabinet.

First, the television receiver 1 can be held close at hand to monitor the alternate program screen, and since the number of scanning lines etc. on this screen is the same as the standard one, there is no drawback that the alternate program screen is difficult to see. . Second, since the television receiver 1 and the color television receiver 6 have independent configurations, they are not compatible with BBD. The circuit configuration is simple as it does not require a memory or its control circuit. Thirdly, the television receiver 1 itself is useful and therefore practical. Fourthly, there is the advantage that the remote-controlled color television receiver 6 can be a normal one that can be remotely controlled. Fifth, since the channel selection switch group 3 of the television receiver 1 also serves as a channel changeover switch during remote control, it can simply be used to add a transmitter for remote control to the television receiver. There is no waste in terms of structure. Note that the tuner 10 provided in the television receiver 1 is not limited to the configuration of an electronic tuning tuner, but may be one using a mechanical tuning device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view used to explain an example of the use of a television receiver according to the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a color television receiver on the side to be remotely operated. FIG. 2 is a block diagram of an example of a machine. 1 is a portable television receiver, 2 is a small black and white cathode ray tube, 3 is a group of channel selection switches, 4 is a command switch,
5 and 9 are converters, 6 is a color television receiver, 7 is a color cathode ray tube, and 15 is a transmitter. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A tuner whose reception channel can be changed by a manually operated tuning switch, a video signal system that amplifies and detects the signal from this tuner, a cathode ray tube to which the video signal from this video signal system is supplied, and the above. A television receiver comprising a transmitter that transmits a control signal for channel switching according to the state of a channel selection switch to the outside in conjunction with the operation of a switching means.