KR960015388B1 - General-function remote control transmitter and controlling method for it - Google Patents

Abstract

a remote control code sensing part(31) receiving a remote control code; an amplifying/wave compensating part(32) amplifying the output signal and compensating the wave of the remote control code sensing part(31); an interrupt generating part(34) generating an interrupt; a timer part(35) counting the period of the remote control code; a count part(36) counting the number of the pulse outputted from the amplifying/wave compensating part(32); a central processing unit(37) controlling the transmitting operation; a ROM(38) stored with an operation program of the CPU; a RAM(39) storing the remote control code; a remote control code outputting part(40) transmitting the remote control code; and a key matrix part(41) inputting the operation order of the CPU.

Description

Universal remote control transmitter and its control method

1 is a block diagram showing the configuration of a conventional universal remote control transmitter.

2 a-c is a view showing a compression process of a conventional universal remote control transmitter.

3 is a block diagram showing the configuration of the universal remote control transmitter of the present invention.

4 is a detailed circuit diagram illustrating an exemplary embodiment of the control signal detector of FIG. 3.

A-d of FIG. 5 is operation waveform diagram of each part of FIG. 3 and FIG.

Figure 6 a-d is a view showing the operation of the central processing unit according to the control method of the present invention,

a is a signal flow diagram showing the main routine.

b is a signal flow diagram showing a key interrupt routine.

c is a signal flow diagram showing a learning routine.

d is a signal flow diagram showing the output routine.

7 is a view for explaining the compression process according to the present invention.

* Explanation of symbols for main parts of the drawings

31: remote control code detector 32: amplification / waveform correction unit

33: envelope detector 34: interrupt generator

35: timer unit 36: count unit

37: central processing unit 38: ROM

39: RAM 40: remote control code output unit

41: key matrix portion 43: operation display portion

43: clock generator SW: switching element

The present invention relates to a universal remote control transmitter and a control method thereof capable of remotely controlling a plurality of remote control devices having a remote control function such as a television receiver and a video cassette tape recorder. Receives the corresponding remote control codes of the control devices and compresses the first and second, and performs the third compression according to the repetitive pattern of the remote control code to reduce the amount of information to be stored, and to reduce the amount of memory required And a control method thereof.

In recent years, for convenience of daily life, various electric and electronic devices that are distributed in homes are provided with a remote control function, and the operation of the device is controlled according to the operation of the remote control transmitter.

However, since these remote control devices use unique remote control codes depending on the manufacturer and the product, the remote control transmitter of a specific device cannot remotely control other remote control devices.

Therefore, as the number of remote control devices purchased and used in each home increases, the number of remote control transmitters increases, so that when the remote control devices are remotely controlled, users often have a remote control transmitter suitable for the device to be remotely controlled. There was a problem that caused confusion in choosing.

In order to prevent such confusion, Korean Patent Registration No. 39280 (Notice No. 90-7131) receives and stores the remote control codes of a plurality of remote control transmitters, compresses them, stores them, and selects a remote control device to control. In order to remotely control the operation of a plurality of remote control devices by extending and outputting the compressed data suitable for the original remote control code, a remote control transmitter is proposed.

This conventional technique will be described in detail with reference to the drawings of FIGS. 1 and 2.

As shown in FIG. 1, a detector 2 for receiving in the learning mode a remote control code comprising a pulse burst component and a pulse off component from a corresponding remote control transmitter 1 for a remote control device to be controlled. And a first repetitive pattern discriminator 6 which receives the remote control code received by the detector 2 and converts the pulse burst component and the pulse off component of the remote control code into a code of a given form and first compresses them. A second repeating pattern which receives the first compressed data from the first repeating pattern discriminator 6 and secondarily compresses a combination composed of two adjacent codes constituting the first compressed data into a code having a different form from a given form A discriminator 9, a memory 10 for storing and outputting secondary compressed data output by the second repeating pattern discriminator 9, and corresponding secondary compressed data of the remote control device selected in the remote control mode. Meme A third repeating pattern discriminator 11 for converting the second compressed data inputted from the log 10 into a corresponding combination of two adjacent codes constituting the first compressed data, and the third repeating pattern discriminator ( A fourth repeating pattern discriminator 14 which receives primary compressed data from 11) and converts the primary compressed data into a corresponding remote control code of a remote control device to control the first compressed data, and the fourth repeating pattern discriminator 14; It is composed of a transmitter driver 17 for receiving a remote control code from the transmitter and transmitting it to the corresponding remote control device 19 through the transmitter 18.

In FIG. 1, reference numeral 3 is a gate, 4, 7, 13, and 16 are registers, 5, 8, 12, and 15 are latches, 6A, 9A, 11A, and 14A are memories, and 20 is a kiss. The position part, 21 is a control part, 22 is a pulse generator, 23 is an indicator, SW1 is a learning mode setting switch, and CL1 and CL2 are clock signals.

In the conventional remote control transmitter configured as described above, when learning the remote control code, the learning mode is first set by operating the learning mode setting switch SW1 and then the remote control transmitter 1 is operated to remotely detect the remote control code. Send control code.

Then, the detector 2 receives a remote control code transmitted by the remote control transmitter 1, and the received remote control code is gated 3, a register 4, and a latch 5 according to the control of the controller 21. Are sequentially input to the first repeating pattern discriminator 6.

The first repeating pattern discriminator 6 determines the number of pulses and the pulse off period of the input remote control code, i.e., the remote control code having the pulse burst component and the pulse off component as shown in a of FIG. The number of pulses and the off period are compared with the patterns previously stored in the memory 6A, and are first compressed and output as predetermined data as shown in b of FIG. 2, and the output primary compressed data is stored in the register 7. And a second repeating pattern discriminator 9 through a latch 8.

The second repetition pattern discriminator 9 compares a combination of two adjacent codes constituting the input primary compressed data with a reference pattern previously stored in the memory 9A, as shown in FIG. Compressed, and the secondary compressed data is stored in a predetermined area of the memory 10.

In such a state, when remotely controlling the remote control device, the learning mode is canceled, the control mode corresponding to the remote control device is selected in the remote control mode, and the keyswitch of the key switch unit 20 according to the control operation. Manipulate

Then, the control unit 21 accesses the memory 10 in response to the operated key switch, reads out and outputs predetermined secondary compressed data.

Secondary compressed data output from the memory 10 is input to the third repeating pattern discriminator 11, is compared with the pattern stored in the memory 11A, and expanded in the form of the first compressed data, and the third repeated pattern discrimination is performed. The signal extended from the device 11 is input to the fourth repetition pattern discriminator 14 through the latch 12 and the register 13 sequentially.

The fourth repetition pattern discriminator 14 compares the pattern of the input signal with the pattern stored in the memory 4A and extends the original remote control code, and the extended remote control code is latch 15 and register 16. And transmitted from the transmitter 18 via the transmitter driver 17 to control the operation of the remote control device.

However, the conventional remote control transmitter as described above recognizes the components of the remote control code as a pulse burst component and a pulse-off component during learning, and extends and transmits the signals stored in the memory that have been learned and compressed in the memory. A time error occurred between the remote control codes, and since the remote control codes were compressed regardless of the repetition pattern, the amount of information to be stored had to be large and the memory capacity had to be large.

That is, when learning the remote control code, an error occurs in the operation of the negative logic device that can generate the pulse burst period and the actual interrupt of the envelope, such as the envelope detection output waveform, in the output characteristics of each block. There was a problem.

When the same remote control code is repeatedly received when the trained remote control code is compressed, all remote control codes are sequentially stored as primary and secondary compression and stored without determining the minimum basic information and continuity of repetition. As the amount of information is very large, the capacity of the memory must be very large, and as a result, the battery consumes a lot of power, which shortens the service life and frequently changes the battery.

The present invention has been devised to solve the above-mentioned general problems, and recognizes from the start time of one pulse burst signal to the start time of the next pulse burst component in one pulse period when learning the remote control code. Based on this, it reads consecutive pulse burst components and recognizes the form of repeated pulse burst components and pulse off components due to the continuity of the remote control code, and reduces the amount of information to be stored. It is an object of the present invention to provide a universal remote control transmitter and a control method thereof, which prevents malfunction of a remote control device to accurately generate a code and reduces the power consumption of a battery by reducing a memory capacity. A detailed description will be given with reference to the drawing of FIG.

3 is a block diagram showing the configuration of the universal remote control transmitter of the present invention, as shown therein, a remote control code detection unit 31 for receiving a remote control code from a remote control transmitter of a remote control device, and the remote control An amplification / waveform correction unit 32 for amplifying an output signal of the code detector 31 and correcting a waveform; an envelope detection unit 33 for detecting an envelope of the output signal of the amplification / waveform correction unit 32; The interrupt generator 34 generates an interrupt in association with changes in the positive and negative logic of the output signal of the envelope detector 33 and is reset according to the output signal of the interrupt generator 34. Compress and store the timer unit 35 for counting the period of the remote control code, the count unit 36 for counting the number of pulses output from the amplification / waveform correcting unit 32, and the received remote control code. Expand and send A central processing unit (37) for controlling, a ROM (38) in which an operation program of the central processing unit (37) is stored, and a RAM for storing and outputting a compressed remote control code under the control of the central processing unit (37). (39), a remote control code output unit 40 for transmitting the remote control code extended by the control of the central processing unit 37, and a key matrix unit for inputting an operation command of the central processing unit 37 ( 41), an operation display unit 42 for displaying an operation state under the control of the central processing unit 37, and a clock generator 43 for oscillating and supplying an operation clock signal.

In this case, the remote control code detector 31 includes a power supply B ⁺ of the light receiving diode PD through a switching element SW in which the power source B ⁺ is controlled to the output signal of the central processing unit 37, as shown in FIG. It was connected to the cathode, and the anode of the photodiode PD was connected to the input terminal of the amplification / waveform correction unit 32 through the ground resistor R and the capacitor C.

The universal remote control transmitter of the present invention configured as described above receives the remote control code transmitted from the corresponding remote control transmitter of the remote control device in the learning mode in which the remote control code is compressed and stored. The received remote control code is determined.

At this time, the remote control code detection unit 31 is provided with a power switching means to receive the remote control code only in the learning mode, the operation is stopped in the normal output operation or standby state is configured to reduce the power consumption.

That is, the remote control code detection unit 31 is provided with a switching element (SW) for controlling the supply of power (B ⁺ ) is controlled in accordance with the output signal of the central processing unit 37 as shown in FIG. In the normal output operation or standby state, the switching device SW is turned off, the power source B ⁺ is cut off, and the operation of the remote control code detector 31 is stopped. SW) is turned on and power supply (B ⁺ ) is normally supplied, and the photodiode (PD) receives the remote control code transmitted by the remote control transmitter through the resistor (R) and the capacitor (C). As shown in FIG. 2, the input terminal of the amplification / waveform correcting unit 32 is input.

The amplification / waveform correcting unit 32 amplifies the weak level of the remote control code input from the remote control code detecting unit 31, corrects the waveform, and outputs it as shown in b of FIG. The logic can be accurately determined, and is connected to the envelope detector 33, the interrupt generator 34, and the counter 36 at the rear end, and amplified to a level sufficient to satisfy the condition of the fan-out. The waveform is corrected and output so that time delay does not occur.

The envelope detector 33 removes the pulse burst component from the output signal of the amplification / waveform corrector 32 to detect the envelope as shown in FIG.

Here, since the remote control transmitter typically transmits a remote control code on a carrier having a frequency in the range of about 10-60 KHz, the band elimination filter for detecting the envelope by the envelope detector 33 must remove a carrier within 60 μsec. Taking a remote control code having a frequency of 10 KHz as an example, the negative logic change of the envelope output from the envelope detector 33 is in the range of about 50 μsec than the pulse burst component of the actual remote control code as shown in FIG. It appears delayed within, and the positive logic change of the envelope occurs exactly in synchronization with the start point of the pulse burst component so that no time error occurs.

The interrupt generator 34, in conjunction with the output signal of the envelope detector 33, interrupts the signal from positive logic to negative logic or from negative logic to positive logic, as shown in d of FIG. The interrupt signal generated as a function of? Is operated as a factor of reading the time when the timer section 35, which will be described later, counts the logic change period, and the number of pulses counted by the count section 36, and reduces the error of reading the count time. For this purpose, the control signal acts as a control signal for automatically evacuating to a capture register (not shown) in which the count value of the timer unit 35 is embedded at the time of generating the interrupt signal. The pulse burst period and the pulse off time of the remote control code evacuated to the capture register are added and used as the pulse period.

The timer unit 35 uses a 1/8 divider for a 16-bit divider, and when using a reference pulse having a period of 1 μsec, it can measure a maximum time of 216 × 8 × 1 μsec = 524.288 msec. When a pulse having a period longer than the measurement time of 524.288 msec is input, an overflow occurs, which acts as a cause of interruption by the timer unit 35.

For example, when a remote control code having a limited number of pulses is received, an interrupt by the timer unit 35 is generated when 524.244 msec has elapsed after outputting the burst component of the last pulse.

The counting unit 36 performs a counting operation in synchronization with a change in a specific logic, that is, positive logic or negative logic, of an electrical pulse signal outputted by amplification and waveform correction by the amplification / waveform correcting unit 32. In the interrupt work program associated with the logic interrupt signal, the count value of the counting unit 36 is read and initialized to prepare for counting the next pulse number.

Meanwhile, as shown in a of FIG. 6, the CPU 37 performs an initialization operation at an initial stage when the battery is inserted and determines whether the backup data stored in the storage area of the RAM 39 is damaged. The RAM 39 is cleared, the predetermined initial value is set, and then the predetermined operation is performed, and the current task is determined by determining whether the learning, the search for the integrated key, the output, and the message indicator are in progress. In this case, the standby state is maintained.

When the work execution is completed in this state, the power consumption at the time of oscillation stop is eliminated before the clock generation unit 43 stops oscillation after the completion of the work preparation. After setting the backup data to check whether the stored data is damaged after the main power is cut for a long time, save it in a specific area, enable the key interrupt, and let the clock generator 43 oscillate when the key interrupt occurs. The oscillation of the clock generator 43 is stopped in the operation stop state, and the power of the battery is supplied only to the RAM 39 so that the power consumption is minimized.

When a key interrupt occurs, as shown in b of FIG. 6, the mode for inputting the mode key, that is, the mode key provided in the key matrix unit 41 is input, and the mode to be set is determined.

In this case, when the program mode is set by pressing the program mode key, the general key is input to determine whether the learning key or the integrated key is input. When the learning key is input, the learning preparation is performed. After preparing to find integrated key, it displays a message and waits for integrated code search and learning.

At this time, if the learning key is input, it reads the learned information, recovers the remote control code and displays a message, waits for the output of the remote control code, and if the general key is input, leads to the integrated key selection code. It reads the integrated code information, recovers the remote control code, displays a message, and waits for the output of the remote control code.

On the other hand, in the case of learning and storing the remote control code in the learning ready state, the central processing unit 37 performs the logic of the interrupt signal generated as described above in the interrupt generator 34, as shown in c of FIG. To judge.

At this time, when the interrupt signal is negative, the count unit 36 inputs the number of pulses of the remote control code counted by the count unit 36, inputs the pulse burst period stored in the capture register of the timer unit 35, and then counts the unit 36. Prepares to count the pulse of the next remote control code, saves the number of pulses entered and the pulse burst period, prepares to respond when positive interrupt signal is input, and maintains the work standby state.

If the interrupt signal to be input is positive logic, the pulse off period stored in the capture register of the timer unit 35 is input, the pulse period and the pulse burst period are added, and the pulse period is calculated and stored in the buffer. When preparing to respond to the negative logic interrupt signal, the counter unit 6 counts the number of pulses of the remote control code, determines whether the buffer in which the pulse period is stored is in the full state, and is not in the full state. Keep your work waiting.

When the buffer is in the full state, the frequency of the pulse burst signal is calculated to determine whether an error occurs. That is, when a certain number of pulses and pulse periods are measured, the learning mode is canceled and the measured information is evaluated. as performing compression and store operations in the case be determined by the first comparison and the highest frequency (F _H) and the lowest frequency (F _L) calculates the frequency of the pulse burst signal, and set the calculated frequency in advance the highest frequency (F _H) If it is above or below the minimum frequency (F _L ), the learning mode is canceled and an error message is displayed, and if it is between the highest frequency (F _H ) and the lowest frequency (F _H ), the second compression is performed.

Secondary compression is similar pulses within a range of a specific error by using the pulse number and pulse period information of the input pulse as shown in a of FIG. 7 as one pulse unit as shown in b of FIG. If the same pulse is registered and the information value of the representative pulse is registered as the representative value, and registered in this manner, the control command code is composed of eight or less types of pulses.

Therefore, only the information of the separate 3-bit binary code in the registered order can represent a sequence of consecutive pulses as shown in c of FIG. 7, and the 3-bit binary code 000, 001, 010, 011, 100, It is possible to define the information of other pulses corresponding to the representative values as 101, 110, and 111. After performing this series of processes, the frequency of the information pulses and the maximum number of pulses and pulse periods It is a pair of pulse information, a pulse string expressed in the form of a three-bit binary code, and the number of pulses. If there are eight or more predefined types of pulses, they are treated as an error.

When the second compression of the received remote control code is completed in this way, after performing the third compression with the second compressed information, the compressed information is stored in the RAM 39, and a completion message is displayed.

Tertiary compression is the beginning and end of a pulse bundle of data strings of 3-bit binary code and the start of a repetitive pulse bundle by an operation of recognizing the continuity of information processed in the second compression as shown in e of FIG. And minimizing the amount of information to be stored by recognizing the end and setting only valid data up to the pulse data generated at the end of the repetitive pulse bundle, and in the compressed information storage area of the defined RAM 39 of the selected contact position during the learning preparation operation. When other information is stored in the compressed information storage area, the stored information is invalidated and the current information is newly stored and valid.

The method of recognizing the continuity can be classified according to the output characteristics of the pulse bundle of the remote control code, in which a control code pulse bundle is repeated, a pulse code bundle in one pulse code bundle, and one control code. There are a form of a pulse bundle and a form in which only a constant carrier is output.

An important element of continuity recognition is the type of pulse, which is defined as the basic bundle of the control code from the start of the pulse to the position where the pulse type appears at least once, and the pulse bundle repetition form of the control code is defined after the bundle of basic pulses. Again, it is assumed that the bundle of repeated pulse codes ends until a position where all types of pulses appear at least once.

The start code and the repeat code form have the basic bundle like the control code pulse bundle repeat form and extract the types of pulses that occur after the basic bundle and repeat the pulse code form to the first position where all of these pulses appear at least once. Is the end pulse.

In the bundle control code pulse bundle type recognition method, when the interrupt signal generated by the overflow of the timer unit 35 occurs, the number of pulses input is the end pulse of the bundle of control codes.

Since the control code information means a specific carrier frequency, when a carrier having a high frequency component is inputted, a constant pulse output type is determined by an interrupt generated by the counting unit 36. When the matching pulses are recognized continuously, the envelope can be detected by an interrupt of the timer section 35 occurring in the high level state.

Taking the remote control code shown in a of FIG. 7 as an example, the bundle of learned control codes has a three-bit binary code 000 representing 50 pulses and a pulse period of 2 msec as shown in b and c of FIG. It can be seen that it is composed of three types of three-bit binary code 001 indicating that the number of pulses is 30, the pulse period is 1 msec, and three-bit binary code 010 which indicates the number of pulses is 30 and the pulse period is 5 msec.

When three kinds of three-bit binary codes are represented in decimal, they are indicated by 011010012011010012 ... as shown in d of FIG. 7 according to the order of the binary pulse string, and the number of pulses used is three.

The first pulse in which all three pulses are used more than once is the ninth pulse, and the type of pulses appearing after the ninth pulse is three, so the pulses in which all three are used more than once are the eighteenth. Since the arrangement of the 10th pulse to the 18th pulse coincides with the bundle of the first pulse, the start pulse and the end of the control code bundle are 1 and 9, and the start and end of the repetition are also 1 and 9.

The frequency of the pulse burst signal is 100 KHz when the pulse burst period is assumed to be 500 msec. Therefore, the final amount of information to be stored is as follows.

In this way, the predetermined information stored in the RAM 39 is selected by pressing the key of the key matrix unit 41 in the output mode, is extended to the original remote control code, and then transmitted through the remote control code output unit 40. When the predetermined learning key of the key matrix is pressed in the output mode, information stored in the learning information storage area of the RAM 39 corresponding to the pressed learning key is read and restored to a form for outputting the original information. Expand to remote control code.

The decompression of the information first lists the pulse trains according to the continuity, which is the reverse operation of the 3rd compression, and obtains the number of pulses, the pulse duration, and the frequency information according to the pulse train, which is the reverse operation of the secondary compression, and then bursts the pulses by the reverse operation of the primary compression. The period and the pulse off period are represented in the form of an electrical signal and then output through the remote control code output unit 40.

As shown in d of FIG. 6, the output of the remote control code re-determines the order of the start and the last pulse in the case of the continuous output bundle, and starts the operation of the timer unit 35 to generate the pulse burst signal of the remote control code. In case of searching for integrated key after outputting, it is determined whether the output is completed. If the output is completed, it sets the next representative control code, waits for a delay for a certain time, and is not searching for integrated key or output is not completed. If not, it is determined whether it is the last pulse. If it is not the last pulse, it prepares for key input and waits for output.

As described in detail above, the present invention accurately generates and transmits an original remote control code without causing an error, thereby precisely controlling the operation of the remote control device, and also compressing and repeating the first and second remote control codes. Third compression according to the pattern reduces the amount of information to be stored, thereby reducing the amount of memory required and reducing power consumption.

Claims (3)

A remote control code detector 31 for receiving a remote control code from a remote control transmitter of a remote control device, and an amplification / waveform corrector 32 for amplifying an output signal and correcting a waveform of the remote control code detector 31. ), The envelope detector 33 for detecting the envelope of the output signal of the amplification / waveform corrector 32, and the positive and negative logic changes in the output signal of the envelope detector 33 An interrupt generator 34 for generating an interrupt, a timer 35 for counting the period of the remote control code while being reset according to the output signal of the interrupt generator 34, and the amplification / waveform corrector 32 A counting unit 36 for counting the number of pulses outputted from the subfield, a central processing unit 37 for controlling the operation of compressing, storing, extending and transmitting the received remote control code, and the central processing unit 37 ROM 38 is stored in the operating program of, RAM 39 for storing and outputting the compressed remote control code under the control of the central processing unit 37, and a remote control code output unit for transmitting the extended remote control code under the control of the central processing unit 37 ( 40) and a key matrix unit (41) for inputting an operation command of the central processing unit (37). The universal remote control transmitter according to claim 1, wherein the remote control code detector (31) comprises a switching element (SW) controlled by a central handling device (37) to supply power only in the learning mode. Judging the learning mode and the integrated key operation mode; and in the judging result, receiving the remote control code transmitted from the remote control transmitter of the remote control device to determine the input frequency of the received remote control code; When the input frequency of the received remote control code is determined, the pulse period and the number of pulses are measured and compressed from the start position of the pulse burst component of the determined remote control code to the start position of the next pulse burst component in one pulse unit. A second compression process of comparing the first compression process with the number of pulses measured and measured in the first compression process, determining the same pulse within the set error range, and then rearranging and compressing the same pulses as representative values and reduced codes And a starting pulse by finding a bundle having continuity in the pulse sequence rearranged by the reduced code in the second compression process. And a third compression step of compressing and storing the end pulse and the pulse start and end of the repetitive command so as to allocate corresponding key information. A first decompression process for finding a compression code corresponding to a signal and decompressing it to a state before the third compression process, and a second decompression process for decompressing information decompressed in the first decompression process to a state before the second compression process And a third decompression process for decompressing the information decompressed in the second decompression process to a state before the first compression process, and generating a remote control code with the information decompressed in the third decompression process to generate a key information allocation code. The control method of the universal remote control transmitter, characterized in that controlled by the transmission process to transmit to be output.