KR940027486A - Universal remote control transmitter and its control method - Google Patents

Abstract

The present invention allows a plurality of remote control devices having a remote control function to remotely control a transmitter with a single remote control transmitter. In the related art, a component of a remote control code is recognized as a pulse burst component and a pulse off component during learning. There is a time error between the existing remote control code to be learned and the remote control code that extends and transmits the signal that has been learned and compressed and stored in the memory, and also compresses the remote control code irrespective of its repetition pattern. The capacity had to be large.

The present invention reads a continuous pulse burst component on the basis of recognizing the period of one pulse from the start time of one pulse burst signal to the start time of the next pulse burst component when learning the remote control code, and the remote control code By reducing the amount of information to be stored by recognizing the shape of repeated pulse burst component and pulse off component due to the continuity of, it prevents the malfunction of the remote control device to be generated by accurately generating the original remote control code without any error. In addition, the power consumption of the battery can be reduced by reducing the memory capacity.

Description

Universal remote control transmitter and its control method

Since this is an open matter, no full text was included.

Figure 1 is a block diagram showing the configuration of a conventional universal remote control transmitter, Figure 2 (a)-(c) is a view showing the compression process of a conventional universal remote control transmitter, Figure 3 is a universal remote control transmitter of the present invention Fig. 4 is a detailed circuit diagram showing an embodiment configuration of the control signal detector of Fig. 3, and (a)-(d) of Fig. 5 are operation waveform diagrams of Figs. (A)-(d) of FIG. 6 show the operation of the central processing unit according to the control method of the present invention, (a) a signal flow chart showing a main routine, (b) a signal flow chart showing a key interrupt routine, (C) is a signal flow diagram showing the learning routine, (d) a signal flow diagram showing the output routine. 7 (a)-(e) of FIG. 7 illustrate the compression process according to the present invention.

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 for amplifying an output signal of the remote control code detector 31 and correcting a waveform; 32), an envelope detector 33 for detecting an envelope of an output signal of the amplification / waveform corrector 32, and a change in the positive and negative logic of the output signal of the envelope detector 33; An interrupt generator 34 for generating an interrupt, a timer 35 for counting a period of a remote control code while being reset according to an output signal of the interrupt generator 34, and the amplification / waveform corrector ( A counting unit 36 for counting the number of pulses output from 32, 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 in which the operation 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 extracting 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) has a switching element (SW) which is controlled by the central processing unit (37) and supplies power only in the learning mode. A first compression process for measuring the pulse duration and the number of pulses in one pulse unit from the start position of the pulse burst component of the received remote control code to the start position of the next pulse burst component; Comparing the pulse periods and the number of pulses, determining that the same pulses are within the set error range, and then rearranging the same pulses as representative values and reduced codes, and rearranging them by reduced codes in the second compression process. A third compression process for finding a bundle having continuity in a pulse train and finding and storing a start pulse and an end pulse, and a pulse start and end of a repetitive command; Finding the first extension process to expand to the state before the third compression process, and the state before the second compression process the information extended in the first extension process Generating a remote control code with a second extension process for decompressing, a third extension process for decompressing the information decompressed in the second extension process to a state before the first compression process, and the information extended in the third extension process The control method of the universal remote control transmitter, characterized in that controlled by the transmission process. ※ Note: This is to be disclosed by the original application.