JPH06237494A - Controller for remote control transmitter - Google Patents

Abstract

PURPOSE:To set a format to the one in response to an equipment subject to remote control by encoding sequentially a key code for equipment power source ON in a different format. CONSTITUTION:When a setting mode key 23 is operated, a CPU 11 reads data in an X-th format. A key code for power source ON is encoded according to the format. Then the key code of power source On is sent in the X-th format. Then the type of the format is sequentially switched to sent the key signal of power source ON. When the power source of the equipment is turned off till prescribed time elapses, the X at that time is set as format kind data F. Then a flip-flop 3 is reset and the mode restores to power-down mode. When the power of the equipment does not become off even after the lapse of the prescribed time, the key signal of power source ON by a different format is sent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control transmitter control device for use in, for example, a remote control transmitter that controls a home electronic device to perform a predetermined operation.

[0002]

2. Description of the Related Art Conventionally, in a remote control device using, for example, infrared rays, a remote control transmitter encodes a code corresponding to an operated key switch in a predetermined format, modulates a carrier signal with the encoded signal, and Is configured to be transmitted by an infrared signal. On the other hand, when the remote control receiver receives a signal string encoded in a specific format, the remote control receiver is configured to perform control according to the code. Such an infrared remote control transmitter and receiver are so-called AV
It is widely used in household electronic devices such as appliances and air conditioners.

However, since the encoding format is different for each manufacturer or each set, there is the trouble of operating different remote control transmitters for each set. Therefore, for example, in the case of TV remote control transmitters, remote control transmitters that can be used as TV remote control transmitters for multiple companies and that have only the functions of the main keys that are the same as those of other companies are also sold separately. It has become so.

[0004]

However, as described above, in the remote control transmitter capable of supporting a plurality of types of coding formats, the format switching operation is performed so that the code can be coded in the format according to the set to be remote controlled. Therefore, it is necessary to adjust the format correctly. Therefore, the manufacturer name, model, or manufacturing date of the set to be controlled must be checked, which is complicated.
Moreover, for a user who is not familiar with such circumstances, the remote control transmitter does not function at all due to incorrect settings, and the cause thereof cannot be understood.

An object of the present invention is to provide a control device for remote control transmitter, which eliminates the need for the user to switch the coding format type according to the set to be controlled by the remote control and solves the above-mentioned problems.

[0006]

A remote controller transmitter control device according to the present invention comprises a key reading means for reading operation states of a plurality of keys, a key code generating means for generating a key code of the read keys, and the key. For a remote control transmitter including key code encoding means for encoding a code in a set type format, carrier signal generating means for generating a carrier signal, and modulating means for modulating the carrier signal with the encoded signal In the control device, in the setting mode, the key code to be encoded is set to the key code for turning on the power of the device, and the type of the format encoded by the key code encoding means is sequentially switched to the key code for turning on the power of the device. Power-on keyco that sequentially encodes each in a different format A sequential encoding means, a power-on detecting means for detecting a power-on state of the device, and a format type storing means for storing a type of the format when the power-on detecting means detects the power-on state. Become.

[0007]

In the controller for remote control transmitter according to the present invention, the key reading means reads a plurality of key operation states, and the key code generating means generates the key code of the read key.

The key code encoding means sequentially encodes the key code in the set type format.
The carrier signal generating means generates a carrier signal of a predetermined frequency, and the modulating means modulates the carrier signal with the encoded signal and outputs it from the output terminal. Then, in the setting mode, the power-on key code sequential encoding means sets the key code to be encoded to the power-on key code of the equipment, and the key code encoding means sequentially switches the types of formats to be encoded, and the power supply of the equipment The key codes for ON are sequentially encoded in different formats. The power-on detection means detects that the power of the device has been turned on, and the format type storage means stores the type of format when the power-on state is detected.

With the above operation, in the setting mode, the key code of the power-on key is sequentially encoded in different types of formats and transmitted, so that it is encoded in the format corresponding to the format of the receiver that receives the signal. When the receiver turns on, the receiver powers on the device. The power-on detection means detects this, and the format type at that time is stored, so that the format suitable for the device to be remote-controlled is automatically set. Therefore, the user of the remote control transmitter using the remote control transmitter control device of the present invention does not need to check the maker name, model, manufacturing date, or the like in order to set the type of format.

[0010]

1 is a block diagram showing the configuration of a control device for a remote control transmitter according to an embodiment of the present invention. In FIG. 1, reference numeral 20 denotes a control device for remote control transmitter, which is configured as, for example, a single-chip C-MOS LSI. In FIG. 1, ceramic oscillators 21 and 22 are externally connected to the oscillation circuit 1 and the oscillation circuit 2, respectively, and output original oscillation signals of different frequencies. The oscillation signal of the oscillation circuit 1 is used as a system clock signal. CPU11 is ROM
The program previously written in 8 is executed to perform various processes described later. The RAM 9 is used as various working areas for editing data to be transmitted. The internal control latch 7 includes an oscillation circuit 1, an oscillation circuit 2, a flip-flop 3, a switching circuit 4, a frequency dividing circuit 5 and an AND gate 6.
To the CPU 11
Gives a control signal to each section through the internal control latch 7. The flip-flop 3 is reset by a signal from the internal control latch circuit 7 and set by a key input signal described later. This flip-flop 3 outputs the oscillation start / stop signal of the oscillation circuit 1. When the flip-flop 3 is in the set state, the oscillation circuit 1
Starts oscillation and stops oscillation in reset state.
The oscillator circuit 2 performs an oscillation start / stop operation according to a signal given from the internal control latch circuit 7. The switching circuit 4 selects one of the signals of the oscillation circuits 1 and 2 according to the signal of the internal control latch circuit 7 and supplies it to the frequency dividing circuit 5. The frequency dividing circuit 5 switches its frequency dividing ratio according to the output signal of the internal control latch circuit 7. Further, the AND gate 6 interrupts the output signal of the frequency dividing circuit 5 by the output signal of the internal control latch 7. A key switch 23 is connected to the I / O port 10. The key switch 23 is composed of a matrix circuit, and the CPU 11 is an I / O port 1
A strobe signal is output to the key switch 23 via 0 and the return signal is read. The drive circuit 24 is AND
The infrared LED 25 is driven according to the output signal of the gate 6. The sensor 27 is, for example, a sensor that detects a power on / off state of a device such as a TV set, and a magnetic sensor that detects a magnetic field radiated from the device or a light receiving sensor that detects light emitted from a cathode ray tube or a pilot lamp. Etc. are used. The sensor control circuit 26 controls the sensor 27 to convert the detection state thereof into a logic signal. The CPU 11 reads the detection state of the sensor via the I / O port 12 and detects the power on / off state of the device.

In the control device for remote control transmitter shown in FIG. 1, an encode signal for modulating a carrier signal is input from the internal control latch circuit 7 to the AND gate 6, and the frequency of the required carrier signal is switched by the switching circuit 4. And the frequency dividing circuit 5 are switched by changing the frequency dividing ratio. In the power save state, the flip-flop 3 is in the reset state, the signal from the internal control latch circuit 7 to the oscillation circuit 2 is also in the oscillation stop state, and the control device for remote control transmitter is composed of the C-MOS circuit. The overall power consumption of 20 is extremely low. If any key of the key switch 23 is operated in this state, the flip-flop 3 is directly set and the oscillation circuit 1 starts oscillation, whereby the system clock is generated, and the CPU 11 is pre-written in the ROM 8. After the execution of the stored program is started and a series of processing is completed, the flip-flop 3 is reset to be in the power save state again.

Next, FIG. 2 shows an example of coded format data which is written in advance in the ROM 8 shown in FIG. As shown in FIG. 2, the types of formats are provided from the 1st to the mth, and the coding formats (PIM, PW
M, PPM, etc.), bit length, header code (data of the reader portion), basic pulse width, pulse width of data “1”, carrier frequency and the like.

An example of the key code data table in the ROM 8 is shown in FIG. As shown in FIG. 3, the key codes are provided from the first to the nth, and the key codes used in the first format, the second format, the third format, ... Are written in advance for each key.

Next, FIG. 4 shows a processing procedure of the CPU 11 shown in FIG. 1 as a flowchart. This process is started when any key operation is performed. First, the operated key is read (n1). When the setting mode key is operated, the initial value 1 is first put in the variable X representing the type of format, and the Xth format data is read (n
3 → n4). And according to this Xth format,
The key code for powering on is encoded (n5). As a result, the power-on key code is transmitted in the Xth format. After that, if the power is not turned on by the time when the power on / off state of the device is read and a certain period of time has passed, the variable X is incremented next, and step n4
The subsequent processing is repeated (n6 → n8 → n9 → n4 ...
・). In this way, the type of format is sequentially switched and the power-on key signal is transmitted. When a device is powered on when a power-on key signal encoded in a certain format is transmitted, a power-off key code is encoded in the Xth format (n7 → n1).
0). If the power of the device is turned off by the elapse of a certain time, X at that time is set as the format type data F (n11 → n12 → n13), and then the flip-flop (flip-flop 3 in FIG. 1) is reset. Then, it returns to the power down mode (n14). If the power of the device is not turned off even after a lapse of a certain period of time, the process returns to step n8 and thereafter, and the power-on key signal of a different format is transmitted again (n.
11 → n8 ...). Further, if the power-on key code is transmitted for all the predetermined formats, the processing from step n3 is repeated again (n8 → n).
3 → n4 ...).

If the operated key is not the setting mode key, the Fth format data which has already been set is read out and the key code of the operated key is encoded according to the format (n15 → n16).
After that, the flip-flop is reset to return to the power down mode. If the same key is continuously pressed, the processes of n15 and n16 are performed again.

In the embodiment, the carrier frequency is also switched according to the coding format. However, generally used carrier frequencies are relatively similar even if the coding format is different, and Since the Q of the bandpass filter on the receiver side is also low, it may be fixed at an average carrier frequency. Further, in the embodiment, in order to turn the device on once in the setting mode and then to turn it off again, the key code for powering off is transmitted, but the key code for powering on / off is common. A common power on / off key code may be transmitted to a certain device.

[0017]

According to the present invention, by using the remote control transmitter incorporating the remote control transmitter control device of the present invention, the format according to the device to be remote-controlled can be set without manually setting the format type. It becomes possible to set.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control device for a remote control transmitter that is an embodiment of the present invention.

FIG. 2 is a diagram showing an example of coded format data in a ROM.

FIG. 3 is a diagram showing an example of a key code data table in a ROM.

FIG. 4 is a flowchart showing a processing procedure of a CPU.

[Explanation of symbols]

20-Control device for remote control transmitter (single chip LS
I)

Claims (1)

[Claims] 1. A key reading means for reading operation states of a plurality of keys, a key code generating means for generating a key code of the read keys, and a key code encoding means for encoding the key code in a set type format. A remote control transmitter control device comprising: a carrier signal generating means for generating a carrier signal; and a modulating means for modulating the carrier signal with the encoded signal, in which a key code to be encoded is set in a setting mode. Key code for power-on, and the type of the format encoded by the key code encoding means is sequentially switched to sequentially encode the power-on key code of the device in different formats. And the power-on state of the device is detected That the power-on detecting means, said power-on format type storage means for storing the type of the format when the detection means detects the power-on state, city remote control transmitter control device including a.