JPS5812474A - Remote controller - Google Patents

Abstract

PURPOSE:To obtain a simplified remote controller for remotely operating a TV receiver, etc., by obtaining a control signal with a prescribed period only when a remote operation signal which exceeds a noise removal time is supplied, and then supplying the control signal to a system to be controlled. CONSTITUTION:The contents of a 500-scale counter 19a are preset to, for example, (50) when a detection output is supplied to a terminal 10a, and a reference pulse is supplied as a subtraction input to the counter 19a through AND circuits 23 and 22a. Further, a pulse generated when the counter 19a shows (0) appears at a terminal 19a to control channel switching by the pulse. Similarly, the contents of a 200-scale counter 19b are preset to (500) when a detection output is supplied to a terminal 10b, and a reference pulse is supplied as a subtraction input to the counter 19b through the circuit 23 and a circuit 22b; and a pulse generated when the counter 19b shows (0) appears at a terminal 9b to control sound volume by the pulse.

Description

[Detailed description of the invention]

The present invention relates to a remote control device used for remote control of a television receiver, for example. 2. Description of the Related Art A conventional remote control device for, for example, a television receiver has a configuration shown in FIG. In Figure 1,
(1) shows an ultra-f wave!Iku ρ phone that receives a remote control signal sent from a remote location (for example, ultrasonic waves).For simplicity, the case where channel switching and volume 11!1 are remotely controlled is shown. Assuming that the remote control signal has a frequency f
l for channel switching and ma number f! and one for volume adjustment, and the two are distinguished by frequency. Therefore, the output of the ultra-f-wave microphone +1) is supplied to the amplifier (2), and the output of the amplifier +21 is supplied to the bandpass filter (3m) of frequency f1 and the bandpass filter (3b) of frequency f2, The output of these bandpass filters (3m) and (3b) is the detection circuit (4m)
and (4b), respectively. The output of the detection circuit (4m) is used as one input of the AND circuit (7a), and the output of the detection circuit (41) is input to the integration circuit (51).
The signal transmitted through the AND circuit (61) is the other input of the AND circuit (7m). Integrating circuit (5a
) and the level detection circuit (6a) detect the received frequency 1
This is to eliminate ultrasonic noise of 1 or f2 by taking advantage of the fact that it normally occurs only for a very short time. ! It is configured as shown in Figure 2. In other words, the terminal (10m) has the iris 3 of the detection circuit (4m).
The detection output shown in Figure AK is supplied, and this is integrated by an integrating circuit (5a) consisting of a resistor aυ and a capacitor fa21,
An integral output shown in FIG. 3BK is generated. This integrated output is applied to the base of an NPN transistor α3, which is grounded. When the integrated output exceeds 0.6M, this transistor a3 is turned on. The collector of transistor 0 is an NP whose emitter is grounded.
It is connected to the base of N-type transistor I, so when transistor αj turns on, transistor No. 10 turns from on to off, and the collector of transistor α is connected to the terminal (15 shown in Figure 3 Ck). For example, the time To after the output of the detection circuit (41) is generated is 50 m.
- An output that rises with a delay is obtained. Now, even if a noise that disappears within time To is received and its detection output appears from the detection circuit (4 Hatake), the transistor a3 of the level detection circuit (6m) will not turn on, and the terminal r151 will be at O■. be. The output of this terminal α9 and the output of the detection circuit (4m) are supplied to the AND circuit (71), so when noise is received, the output of the AND circuit (71) is @0'', allowing normal remote control. When the signal is received, the output of the AND circuit (7m) becomes 11'' as shown in Figure I)C. The output of this AND circuit (71) is unstable! This is the control input for the pulse generator (8 m) configured as a multipibrator, etc., and while the output of the AND circuit (71) is @l'', the third
As shown in Figure BK, a pulse with a period T1 of, for example, 500 m5 is generated at the output terminal (9a) K of the pulse generator (8M). This pulse with period TI becomes, for example, a control signal for channel switching, and channel switching is advanced by one channel every time l pulses are generated. On the other hand, the frequency f! A detection circuit that detects the remote control signal (
4b) Similarly, K also includes an integrating circuit (5b), a level detection circuit C@b), an AND circuit (7b), and a pulse generator (
8b) is connected, and while the output of the AND circuit (7b) is @1'', the output terminal (9h) of the pulse generator (8b)
To, period T! For example, a 200 ms pulse is generated. This pulse controls the volume level in steps. In the above-mentioned conventional remote control device, in order to obtain two types of control pulses, an integrating circuit (5
M) (5b) and level detection circuits (6a) (6b) were required, as well as a pulse generator (8m) (8b), making the circuit configuration complicated. In addition, the integral circuit (
5a) and (5b) are difficult to integrate into an IC, and a pulse generator (
8m) (8b) is also unstable! In the case of a multivibrator configuration, in order to make the oscillation period relatively long, a large capacitance capacitor must be used, making it difficult to integrate into an IC. Therefore, a remote control device has been proposed that eliminates the drawbacks of the conventional remote control device, has a simple configuration, and is easily integrated into an IC. In order to help the customer understand the present invention, this remote control device will be explained below. In FIG. When the remote control signal of frequency f1 is received, the terminal (10 m) becomes 11", and when the remote control signal of frequency f2 is received,
The terminal (10b) is 11''. Also, (11B is a reference pulse generator that generates a reference pulse with a predetermined period, for example, 1 ms, αη is a 50-decimal counter, and the α port is a flip 7
0, (19a) is a 500-decimal counter, (lsb
) is a 200-decimal counter. Now, a remote control signal of frequency f1 is received and the terminal (10
a) Suppose that the detection output shown in Figure A of K Coffin 5 is fed together. The rise of this detection output resets the 500-digit counter (lSa), and the detection output is supplied to the AND circuit (211) via the OR circuit (2). Since a reference pulse with one period of 1 ms is supplied, a reference pulse appears at the output of the AND circuit C2D as shown in FIG. K as shown in Figure 5C
A pulse with a period of 50 ffjl is generated, and the first generated pulse sets a 7 lip-flop am.
The set output of the 71J knob 70 knob α is from 0'' to @1' as shown in Figure 5DK.The output of this 7 lip-flop Da (Figure 5D) and the terminal (
The detection output (A in FIG. 5) from the output (log) and the reference pulse are supplied to an AND circuit (22m) K. Then, the reference pulse that has passed through the AND circuit (2c) is sent to the SOO advance counter (x
9a) K is supplied, and every time 500 reference pulses are counted, a pulse (carry) with a period of 500 ml as shown in FIG. Then, when the detection output supplied to the [terminal (lon) K] changes from @1' to @0'', the flip 7a knob a is reset, and the supply of the reference pulse to the 500-decimal counter (t9a) K is stopped. Channel switching is advanced by a pulse with a period of 500 ms that appears in (91).
Apply the pulse appearing in K to the shift register, connect a variable resistor that determines the channel selection voltage to each bit of shift register I, and sequentially adjust the predetermined channel selection voltage as the pulse is supplied from the terminal (9) to the shift register. This tuning voltage may be supplied as a bias voltage to a variable capacitance diode constituting an electronic tuning chainer. In addition, when the detection output of the remote control signal with #C frequency f3 is supplied to the terminal (10b), the tritubular flop α trend is set in the same way as described above, and the reference pulse is sent to the 200-decimal counter through the AND circuit (22b). (19b) K is supplied, and a pulse with a period of 200 ms is obtained at the output terminal (9b) as shown in FIG. 5, whereby the volume increases or decreases in steps. To perform volume control, a pulse appearing at terminal (9b) K is supplied to a counter, the output of this counter is converted to an analog signal by a converter, and this analog signal is given as a control input to the level control circuit. You can change the level of the audio signal supplied to the level control circuit. However, in reality, two types of pulses are required: one to increase the volume and one to decrease the volume. are used as the addition and subtraction inputs of a reversible counter, so that the increase or decrease in volume can be reduced. Also, since the flip-flop side is set by the first pulse of the 50-decimal counter, its set output rises because the test force is at the terminal (lOa) or (xob)
There is a delay of 50m5 after I/C is supplied. Therefore, the frequency f1 or f! ultrasonic noise is received,
Even if the detected output is generated at the terminal (LOA) or (10B), most of the waveform will disappear within 50m5, so it will be supplied to the terminal (9M) or (9B) to the multiple control system due to noise. It is possible to prevent pulses from occurring. According to the above-mentioned remote control device, compared to the conventional remote control device shown in FIG.
111 circuits are required, and the noise removal circuit requires 2 integration circuits and 2 level detection circuits, but 50 circuits are required.
Only the advance counter αη and the flip-flop αa are required,
The overall circuit configuration can be simplified. In particular, if an integrating circuit is not required and the period of the reference pulse of the reference pulse generator αe is as short as 1 ms, the capacitance of the capacitor will not increase even when an unstable multivibrator is configured, making it easy to integrate into an IC. becomes. In addition, if the ll' movement of the period of the reference pulse is sufficiently suppressed, the terminal (9m) or (
9b) The period of the pulse obtained by K is the specified one,
You can expect stable operation. An object of the present invention is to realize a remote control device with a simpler configuration without sacrificing the above-mentioned advantages. An embodiment of the present invention will be described below with reference to FIG. 6. In this embodiment, a 500-decimal counter (19a)
When the K detection output is given to the terminal (10a), preset the contents to [50], for example, and set the SOO advance counter (
1911) K reference pulse and AND circuit and (22a
) as a subtraction input through a 500-decimal counter (
19g) contents are

The lhalus (baud) generated when the value becomes [0] is obtained from the terminal (9a) K, and the channel switching is controlled by this.
When the detection output is given to the terminal (tob), the contents of xsb) are preset to K[50], and the K reference pulse is sent to the AND circuit O and (2g
b) so that the contents of the 200 road counter (llb) are

The pulse that occurs when it becomes [0] (
Borrow) is connected to the terminal (9b), and the volume is controlled by this. According to the present invention shown in FIG.
This has the advantage that a counter for delaying the time can be omitted. In the above explanation, the information content of the remote control signal is two types, but the present invention is not limited to this, and the present invention can be applied to cases where there are three or more types, and the more types of information content, the better. The effects of the present invention are significant.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional remote control device, I! Figure 2 is a partial connection diagram, and Figure 83 is its operation theory! j! 4 is a configuration diagram of an example of a remote control device used as a reference for explaining the present invention, FIG. 5 is a waveform diagram of each part used for explaining its operation, and FIG. FIG. 1 is a configuration diagram of an embodiment. (1) is an ultra-f-wave microphone, (4m) (4b) is a detection circuit, (58> (5b) is an integrating circuit, (9m) (9b)
) is the terminal from which the pulses supplied to the controlled system are obtained, αe
is the reference pulse generator, αη is the 50-decimal counter, (19m
) is a 500-decimal counter, and (Hlb) is a 200-decimal counter.

Claims (1)

[Claims] a receiving circuit that receives a remote control signal; a pulse generator that generates a reference pulse of a predetermined cycle; The period during which
and a counter to which the reference pulse is supplied, and the counter counts the base pulse after the presetting, thereby outputting a control signal of a prescribed period only when the remote control signal exceeding the noise removal time is supplied. A remote control device is configured to obtain a control signal and apply the control signal to a controlled system.