JPS6365198B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control device having a preset function.

A generally widely used oscillator for a remote control device (hereinafter referred to as a "remote control") is one for television sets. To summarize the features of one example, it is characterized by a wireless system, so it uses a battery as a power source for the remote control, the switch input is a key scan method, that is, input is taken in by a dynamic method, and battery consumption is minimized. In order to suppress this, it is necessary to have a standby function, that is, a function that activates the internal circuits including the reference oscillation circuit only when a key input is received.

First, we will discuss the case where this remote control method is applied to equipment that needs to send multiple signals before it can be operated, such as an air conditioner that needs to send "operation", "airflow", and "temperature setting". This will be explained using FIGS.

FIG. 1 shows an example of the circuit. O ₁ -O ₂ are the key scan outputs, and I ₁ -I ₃ are its inputs. X ₁ is an oscillator that provides an external reference frequency, IC ₁ is a remote control IC that takes in the key scan input, divides the reference frequency by a certain value, superimposes it on the output data as a carrier, and also has a standby function. circuit (hereinafter referred to as a control circuit). Further, OUT is the output terminal of this control circuit IC ₁ , and current amplification is performed by transistors Q ₁ and Q ₂ .
The LED ₁ is an infrared light emitting diode, which is driven by the transistors Q ₁ and Q ₂ to obtain an infrared light output.

Next, a case will be described in which a remote control for an air conditioner is constructed using the circuit shown in FIG. In this case, the assignment of each input key is shown in FIG. Further, an example of actual operation is shown in FIG. Furthermore, the third example of the appearance
As shown in the figure. In order to actually operate an air conditioner, it is necessary to send several types of data such as "operation", "airflow", and "temperature setting". This is because there are significant differences. Therefore, in order to operate the air conditioner using the remote controller of this circuit example, at least several key operations are required during operation (however, one key operation is required to stop the air conditioner. ). One possible way to avoid having to press keys several times is to remove keys other than start/stop from the remote control and move them to the air conditioner itself, but this is inconvenient for operating the air conditioner. Moreover, fine adjustment is troublesome.

Conventionally, preset switches have often been used as a means to easily operate air conditioners with advanced functions. Generally, a multi-point slide switch is used as this switch, but since the notch of the switch also serves as a setting display, it is very practical.

When using the examples shown in FIGS. 1 to 3, since common remote control control circuits have the standby function described above, there are few that have a preset function.

The present invention uses the aforementioned control circuit to provide a circuit that constitutes a remote control equipped with a preset function.

An embodiment of the present invention will be described below with reference to FIGS. 5 to 8. Here, the same parts as in FIG. 1 are given the same numbers and will be explained.

FIG. 5 shows an example circuit. The circuit functions in this figure are compared with the circuit functions shown in FIG. 1 described above. Therefore, the layout of the key input section in FIG. 5 is the same as that shown in FIG. 4.

In FIG. 5, MM ₁ to _{MM 5} are monostable multivibrators, each of which has an oscillation time defined by an external CR constant. _AS1 to _AS4 are analog switches. AS ₁ is set by operating switch SW.
It turns on and gives an input equivalent to the virtual key switch _K1 to the control circuit _IC1 . AS ₂ inputs a preset input from K ₂ or K ₃ to control circuit IC ₁ , and AS ₃ and AS ₄ input preset inputs from K ₄ to _{K 9} to control circuit IC ₁ . .
The output of the control circuit IC ₁ is then amplified by the transistors Q ₁ and Q ₂ and output as infrared light by the infrared light emitting diode LED ₁ . Here, since the monostable multivibrators MM ₁ to _{MM 5} are connected in cascade, the outputs are output in a sequential manner. Here, the operation switch SW is a non-lock switch, and _K2 to _K9 are preset switches.

FIG. 6 shows the external appearance of the remote controller of the circuit shown in FIG. 5, and FIG. 7 shows the data content and timing of its infrared light output. FIG. 8 shows the switch inputs, the outputs OM ₁ to OM ₅ of each monostable multivibrator MM ₁ to MM ₅ , and the output waveforms.

AS ₁ turns ON at the timing when output OM ₁ is output
By doing so, virtual key switch K ₁ (operation/
When the output OM ₃ is output, the key switch K ₂ or K ₃ (air volume setting data) is output, and when the output OM ₅ is output, the key switch K ₄ to _{K 9} (temperature setting data) is activated. data) are output sequentially. Incidentally, in the circuit shown in FIG. 5, all control circuits are constructed from an integrated circuit called C-MOSIC, and since all components are in a static state when no input is made, the static power consumption is extremely low. This is useful when using batteries as a power source.

It is also possible to provide more complex functions by increasing the number of preset switches, monostable multivibrators _MM1 to _MM5 , and analog switches _AS1 to _AS4 .

Therefore, it is possible to realize a remote control with a preset function using a battery as a power source with a simple circuit configuration by using a general control circuit widely used in television sets, etc. Various other application fields are also expected, such as TV volume settings and video playback speeds.

As is clear from the above embodiments, the remote control device of the present invention includes a remote control circuit equipped with a standby function and a key scan input method, a transmitter that transmits an optical signal such as an infrared beam, and a monostable multivibrator. It is equipped with an analog switch, a preset switch, and a non-lock switch, and when the non-lock switch is operated, it intermittently transmits several types of data output, including data from the preset switch. It is possible to realize a remote control with a battery-powered preset function using a general IC circuit that is widely used for air conditioners, etc., with a simple circuit configuration. It can also be expected to have excellent effects in various fields of application, such as TV volume settings and video playback speeds.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a remote control device showing a conventional example;
Fig. 2 is an explanatory diagram of the operation of the remote control device, Fig. 3 is a front view of the remote control, Fig. 4 is an input key assignment diagram of the circuit shown in Fig. 1, and Fig. 5 is an illustration of an embodiment of the present invention. A circuit diagram of the remote control device, FIG. 6 is a front view of a remote control equipped with the same remote control device, FIG. 7 is an explanatory diagram showing the contents and timing of output signals in the remote control device, and FIG. 8 is a diagram of the remote control device. It is an output waveform diagram of each output of the monostable multivibrator in an apparatus. IC ₁ ...control circuit, AS ₁ to AS ₄ ...analog switch, MM ₁ to _{MM 5} ...monostable multivibrator,
K ₁ ...Virtual key switch (non-lock switch),
K ₂ to _{K 9} ...Key switch (preset switch).

Claims (1)

[Claims] 1. A control circuit equipped with a standby function and a key scan input method, a transmitter that transmits an optical signal such as an infrared beam, and a preset switch that specifies the operating mode of a device driven by the transmission signal of the transmitter. A non-lock switch that instructs the operation/stop of the equipment, a monostable multivibrator that sets the timing of inputting signals from the preset switch and non-lock switch into the control circuit, and the output of this monostable multivibrator. It is equipped with an analog switch that operates and connects signals from the preset switch and non-lock switch to the control circuit, and intermittently outputs several types of data including data from the preset switch when the non-lock switch is operated. A remote control device that transmits information.