JPS5838972B2 - Channel sequential feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a channel forwarding device for a television receiver. You can send channels sequentially, and when you reach the original channel, stop and watch that channel again, and if you want to watch that channel in the middle of the above sequential forwarding, you can watch that channel from now on. The aim is to provide a device that can.

With conventional television receivers, in order to know what kind of programs are being shown on other channels, the user must manually switch channels, making the operation extremely cumbersome.

The present invention aims to make this possible electrically, and embodiments of the present invention will be described below with reference to the drawings.

The figure shows an embodiment of the present invention. 1 is a tuner using a variable capacitance element as a tuning element; 2 is a tuner that generates a DC voltage that varies depending on the channel to be selected; A tuning section that applies voltage to a diode to select a specific channel; 3 is the tuning section 2 mentioned above;
This is a display section that is driven by the output of the channel and lights up a lamp corresponding to the selected channel.

For example, the tuning section 2 generates a plurality of different DC voltages using a plurality of preset volumes, allows the output of the volume to be selectively taken out by the output of a decoder, controls the decoder with a counter output, and controls the output of any volume. You can use one that allows you to choose.

Channels can be sent sequentially by applying pulses to the counter.

The specific means of the channel selection section 1 is not limited to the one described above, but may be any other means as long as it can sequentially advance channels each time a pulse is applied.

4 is a set/reset flip-flop, 5 is a gated oscillator that oscillates at a very low frequency, for example, 1 to 0.3 H7, 6 is a counter, 7 is a Nant gate, 8 is a switch for channel forwarding signals, and 9 is for a stop signal. It's a switch.

The negative end of the switch 8 is grounded, and the other end is connected through a resistor 10 to a DC power supply terminal 11, and through a capacitor 12 to a set terminal S of the flip-flop 40 and a reset terminal R of the counter 6.

This set terminal S is connected to the DC power supply terminal 11 via a resistor 13.
It is connected to the.

One end of the switch 9 is grounded, and the other end is connected to the reset terminal R of the flip-flop 4.

The output of the flip-flop 4 is applied to an oscillator 5. For example, when the output of the flip-flop 4 becomes a high level, the oscillator 5 starts oscillating, and when the output becomes a low level, the oscillator 5 stops oscillating. .

The oscillator 5 is a pulse oscillator with a pulse repetition frequency of 1 to 0.3 Hz.

The output pulse of the oscillator 5 is applied to the channel selection section 2 as a channel forwarding signal, and is also applied to the trigger terminal of the counter 6.

Counter 6 Q3. The output of the Nant gate 7 which receives the Q4 output is applied to the reset terminal 4 of the flip-flop 4.

Now, when a certain channel is selected and the switch 8 is closed, the counter 6 is reset, and at the same time, the flip-flop 4 is set and its output changes from low level to high level.

As a result, the oscillator 5 becomes in an oscillating state, and every 1 to 3 seconds
A pulse appears.

Since this pulse is applied to the channel selection section 2, the channels are sequentially switched at intervals of 1 to 3 seconds, so that it is possible to know what kind of programs are being shown on other channels.

In the case of a predetermined number of selectable channels in the channel selection section, for example, 1 ch to 12 channels, when the counter 6 counts the same number as 12, the output of the Nantes gate 7 changes, so a signal is sent to the reset terminal R of the flip-flop 4. The flip-flop 4 is reset and its output goes low, so the oscillator 5 stops oscillating, the channel forwarding stops, and the original channel can be viewed again.

If you want to watch an intermediate channel while the channels are being sequentially changed, press the switch 9 and apply a reset signal to the flip-flop 4, and the flip-flop 4 will be inverted, so that channel will be in the selected state.

It is also possible to configure the switches 8 and 9 with transistors and control their on/off states by remote control signals.

As described above, according to the present invention, by adding a channel forwarding signal and a stop signal as desired, it is possible to sequentially check what programs are being shown on other channels every few seconds. It is also possible to select channels.

[Brief explanation of the drawing]

The figure is a block diagram of a channel forwarding device in one embodiment of the present invention. 1...Tuner, 2...Tuning section, 4.
... Flip-flop, 5 ... Oscillator,
6...Counter, 8...Switch for sequential feed signal, 9...Switch for stop signal.

Claims (1)

[Claims] 1 A tuner using a variable capacitance diode as a tuning element is provided with a tuning section that selectively takes out and applies multiple preset voltages to select a channel, and the tuning section is configured so that the channels are sequentially forwarded one by one each time a pulse is applied. an oscillation circuit that generates a pulse for this sequential feeding once every few seconds;
a counter that counts the oscillation pulses of this oscillation circuit, and sets the oscillation circuit to an oscillation state by a channel forwarding signal generated by a switch operation by a viewer,
When the counter counts the same number as the predetermined number of selectable channels in the channel selection section, or when a stop signal is input by the viewer's switch operation, the oscillation circuit is brought into an oscillation stop state. Features a channel sequential feed device.