JPS6128268B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a switching device.

A conventional television receiver is shown in FIG. In the figure, 1 is an antenna, 2 is a tuner, 3 is a video intermediate frequency amplification circuit, 4 is a video detection circuit, 5 is a video amplification circuit, 6 is a color reproduction circuit, 7 is a synchronization circuit, and 8
1 is a deflection circuit, 9 is a cathode ray tube, 10 is an audio intermediate frequency amplification circuit, 11 is an audio detection circuit, 12 is a low frequency amplification circuit, 13 is a speaker, and 14 to 16 are variables for adjusting brightness, color density, and volume, respectively. It is resistance.

In this way, conventional television receivers use variable resistors 14 to adjust brightness, color depth, volume, etc.
~ 16, but recently there has been an increasing desire to make these adjustments by remote control.
Several types of adjustment devices using IC memory have appeared to meet this demand. An example of this adjustment device will be explained with reference to FIG. 2.

In FIG. 2, 17 is a clock pulse generator consisting of an astable multivibrator, 18 is a push button switch for count up, 19 is a push button switch for count down, 20 is a 4-bit binary up/down counter, and 21 is a binary/decimal counter. decoder, 22 is a group of divided resistors for voltage setting,
23 is a group of reverse current blocking diodes, 24 is a DC voltage output terminal, and these are the variable resistor 14 in FIG.
~16 can be replaced. When the push button switch 18 is pressed, the clock pulses from the clock pulse generator 17 are applied to the count up terminal 20a of the binary up/down counter 20, and the binary up/down counter 20 counts up the clock pulses. Similarly, when pushbutton switch 19 is pressed, a clock pulse is applied to countdown terminal 20b of binary up/down counter 20, which causes binary up/down counter 20 to count down the clock pulse. This binary up/down counter 20 changes its binary count output while the push button switch 18 or 19 is pressed, and holds the binary count output at that time when it is released.
On the other hand, the binary/decimal decoder 21 generates a decimal output in response to the binary count output of the binary up/down counter 20. That is, among the ten decimal output terminals _T1 to _T10 , only one specific decimal output terminal corresponding to each state of the binary count output becomes high level, and the other decimal output terminals become low level. As a result, the predetermined DC voltage set by the voltage setting divider resistor connected to the decimal output terminal that has reached a high level among the voltage setting divider resistors group 22 is output from the DC voltage output terminal 24. This DC voltage changes in stages according to the output state of the binary/decimal decoder 21, that is, the count state of the binary up/down counter 20.

With this configuration, the desired adjustment target device (brightness, color saturation, volume, etc.) can be controlled by simply pressing the pushbutton switch 18 or 19 and sending an up or down signal. Control can be easily performed.

However, these television receivers have only one type of up or down speed, and if the speed is slowed down, it is easier to operate but takes time to adjust; The problem was that it was difficult to operate.

Therefore, in order to solve this problem, an adjustment device that can switch up and down adjustment speeds has been proposed.

As shown in FIG. 3, this adjustment device uses a changeover switch 27 to switch between low-speed clock pulses and high-speed clock pulses from a low-speed clock pulse generator 25 and a high-speed clock pulse generator 26, each of which is composed of an astable multivibrator. The data is supplied to the down counter 20. However, if the adjustment speed is changed by separately providing the changeover switch 27 as described above, the operation is not easy because the switch operation has to be performed twice.

In addition, as another adjustment speed switching method, push button switch 1 for count up and count down is also available.
There is also a method of providing a total of four 8 and 19, two each for high speed and low speed. If you do this,
Although it is easy to operate, there are problems in that it requires a large number of mounting locations due to the heavy use of push button switches, and also requires a large number of transmission codes when used as a remote control.

Therefore, an object of the present invention is to provide a switching device that can be easily controlled by remote control and is easy to operate.

FIG. 4 shows a switching device for a television receiver according to an embodiment of the present invention. In FIG. 4, 28 is a push button switch for count-up which is a non-lock type switch, 29 is a resistor, 30 is a capacitor,
31 is a Schmitt circuit. 32 is a differential circuit,
33 is a waveform shaping circuit, which constitutes a push operation detecting means. 34 is an inverter, 35 is a differential circuit, and 36 is a waveform shaping circuit, which constitute release operation detection means. 37 is a one-shot multivibrator which is a time extension means, 38 is a NAND gate, 39 is an inverter, and 40 is an RS-
Flip-flops; 41 is a low-speed clock pulse input terminal connected to the low-speed clock pulse generator 25; 42 is a high-speed clock pulse input terminal connected to the high-speed clock pulse generator 26; 43 to 45 are analog switches; constitutes a two-input changeover switch. 46 is a count up pulse output terminal connected to the count up terminal 20a of the binary up/down counter 20.

Next, the operation of the switching device of the television receiver of this embodiment will be explained with reference to FIG.
Now, when the push button switch 28 is repeatedly turned on and off and a voltage as shown in FIG. The circuit 31 outputs a voltage whose waveform has been shaped as shown in FIG. 5B. The output voltage of this Schmitt circuit 31 is differentiated by a differentiating circuit 32 as shown in FIG.
The waveform is then shaped by the waveform shaping circuit 33 as shown in FIG. 5D. The output of this waveform shaping circuit 33 corresponds to the moment when the push button switch 28 is pressed. On the other hand, the output voltage of the Schmitt circuit 31 is inverted by the inverter 34 as shown in FIG. 5E, differentiated by the differentiating circuit 35 as shown in FIG. The waveform is shaped as shown in G. The output of the waveform shaping circuit 36 corresponds to the moment when the push button switch 28 is released.

The one-shot multivibrator 37 is driven by the output of the waveform shaping circuit 36, and vibrates for a predetermined period of time (several hundred milliseconds) from the moment the push button switch 28 is released.
Generates output. Further, the NAND gate 38 takes the NAND of the output of the waveform shaping circuit 33 and the output of the one-shot multivibrator 37. That is,
As shown in FIG. 5I, this NAND gate 38 generates an output only when the push button switch 28 is pressed again within a predetermined time after the push button switch 28 is released. RS-Flip Flop 40
In this case, the output of the NAND gate 38 is applied to the set input terminal 40a, and the reset input terminal 40a is applied.
The output of the waveform shaping circuit 36 is inverted by an inverter 39 as shown in FIG. 5J, and then added to b.
The analog switch 44 is controlled by the output of the output terminal 40c as shown in FIG.
The analog switch 43 is controlled by the output of the inverting output terminal 40d as shown in FIG. That is,
When push button switch 28 is pressed only once, RS
- Flip-flop 40 is not set and is set when it is pressed twice or more within a predetermined period of time, and is reset when push-button switch 28 is released, making analog switches 43 and 44 conductive at the time of reset and set, respectively.

As a result, when the RS-flip-flop 40 is reset and set, the low-speed clock pulses and high-speed clock pulses shown in FIG. is supplied to the input side of the analog switch 45. The analog switch 45 is controlled by the output of the Schmitt circuit 31, conducts only while the push button switch 28 is pressed, and outputs a low speed clock pulse and a high speed clock pulse as shown in FIG. 5P.

To summarize the above operation, when the push button switch 28 is pressed once and held in that state, a low speed clock pulse is output from the count up pulse output terminal 46, slowing down the adjustment speed, and the push button switch 28 is pressed once and held. If push button 28 is pressed twice or more in succession and the state is maintained, a high speed clock pulse will be output from the count up pulse output terminal 46, increasing the adjustment speed. When push button switch 28 is released, low speed pulses and Both high-speed pulses are not output and the adjustment operation stops.

Note that although up adjustment has been described in this explanation, down adjustment can be performed in the same way.

As described above, the switching device of the television receiver of this embodiment can be operated by pressing the push button switch 28 once and pressing it twice.
Since the adjustment speed is switched by using multiple presses (including 2 or more times), there is no need for an adjustment speed changeover switch or multiple push button switches.
The number of installation locations and transmission cords can be kept to a minimum, making remote control easy, and ergonomically, pressing twice to switch to high speed is not unnatural and easy to operate.

As described above, the switching device for a television receiver according to the present invention includes a releasing operation detecting means for detecting non-conduction of a non-lock type switch for adjusting the volume, etc. of a television receiver, and time extension means for extending the output of the means; push-operation detection means for detecting conduction of the non-lock switch; and a gate for passing the output of the push-operation detection means during the period when the output of the time extension means is output. and,
A flip-flop to which the output of this gate is applied as a set input and the output of the release detection means is applied as a reset input, the output of the flip-flop is applied as a control input, and a low-speed clock pulse is applied as a first input. a two-input selector switch having a high speed clock pulse applied as a second input, the first input appearing at the output when the flip-flop is in the reset state, and the second input appearing when the flip-flop is in the set state; It is characterized in that the output of the changeover switch is applied as an up input or down input to a counter for adjusting the volume, etc., so that the non-lock type switch can be pressed once and twice (including twice or more). It is possible to switch the adjustment speed by using the .
That is, when the user presses the non-lock type switch and continues to press it, the flip-flop is in the reset state, and the clock applied to the counter for adjusting the volume etc. is at a low speed, and the volume etc. is slowly changed. In addition, when the user presses the non-lock switch once, releases it, and immediately presses it again, the output of the push operation detection means gated by the output of the release operation detection means can be activated. It is added to the set input of the flip-flop, and at this time the flip-flop is in the set state, and the clock applied to the counter becomes high speed, making it possible to change the volume etc. quickly. Therefore, there is no need for an adjustment speed changeover switch or multiple pushbutton switches, and the installation location and transmission cord can be kept to a minimum, making remote control easy and ergonomically. Switching to high speed is natural and easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional television receiver, Fig. 2 is a block diagram of an adjusting device used in another conventional television receiver, and Fig. 3 is a block diagram of a proposed example adjusting device. FIG. 4 is a block diagram of a switching device for a television receiver according to an embodiment of the present invention, and FIG. 5 is a waveform diagram of each part for explaining its operation. 28...Push button switch, 29...Resistance, 30...
...Capacitor, 31...Schmitt circuit, 32...
... Differentiation circuit, 33 ... Waveform shaping circuit, 34 ... Inverter, 35 ... Differentiation circuit, 36 ... Waveform shaping circuit, 37 ... One shot multivibrator, 38 ... NAND gate, 39 ... Inverter, 40 ... RS-Flip Flop, 41...
Low-speed clock pulse input terminal, 42...high-speed clock pulse input terminal, 43-45...analog switch, 46...count-up pulse output terminal.

Claims (1)

[Scope of Claims] 1. Release operation detection means for detecting non-conduction of a non-lock switch for adjusting the volume, etc. of a television receiver; and time extension means for extending the output of the release operation detection means. , a push-operation detection means for detecting conduction of the non-lock switch; a gate for passing the output of the push-operation detection means during the period when the output of the time extension means is output; and the output of this gate is used as a set input. and a flip-flop to which the output of the release detection means is applied as a reset input, the output of the flip-flop is applied as a control input, a low-speed clock pulse is applied as a first input, and a high-speed clock pulse is applied as a second input. a two-input changeover switch, the first input appearing at the output when the flip-flop is in the reset state, and the second input appearing at the output when the flip-flop is in the set state; A switching device for a television receiver, characterized in that it is added as an up input or down input to a counter for adjusting volume, etc.