JPS59218093A - Digital remote controller - Google Patents

Abstract

PURPOSE:To improve noise immunity by transmitting a transmission code or a transmission code having opposite polarity in a prescribed period after a data code comprising the transmission code and the transmission code having opposite polarity are transmitted. CONSTITUTION:A transmission code 17 in an N-bit is transmitted and an inverted transmission code 18 having opposite polarity to the transmission code is transmitted successively in a device where instruction information is coded, modulated and transmitted as a digital remote control signal, and this signal is demodulated at the receiving side and the instruction is decided. Then, a remote control signal immune to noise is obtained by transmitting a data code in a 2N-bit. Further, while a transmission instruction is consecutive, the transmission code 17 or the transmission code 18 of opposite polarity is transmitted repetitively in a specific period.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides improvements to digital remote control devices;
In particular, the present invention relates to improvements in data codes constituting transmission commands in the device.

Generally, a 70-page diagram of a remote control device is arranged as shown in FIG. In FIG. 1, - (101 is a transmitting circuit, +201 is a receiving circuit, (A) is a light emitting diode or other light emitting element, and (A) is a photodiode or other light receiving element. In this configuration, first the information to be sent is The transmitting circuit 101 encodes and modulates it, and transmits it to the light emitting diode.
11, it is converted into an optical signal and transmitted. The transmitted optical signal is received by a photodiode (20), demodulated by a receiving circuit (20), and a command is decoded.

Next, the above transmission circuit will be explained in more detail using FIG. 2. In the figure, (1) is an oscillation circuit, (2) is a timing generator (3) is a key input circuit for generating key scan signal 1 from timing generator (2) and inputting it to the key encoder, and +47 is an instruction decoder. A data code, that is, a transmission command is created using these. (5) is a code modulation circuit that pulse-modulates decoding; and (6) is an output circuit that transmits this pulse-modulated data hood as a remote control signal.

FIG. 3 shows bit data of 0" and 11" forming the data code sent out from the output circuit (6).

The difference between the transmission code °0″ and “1” is the transmission signal nosl+
(ID is code @O", and the pulse interval of two pulses is changed to 1, for example.
m5I and f121 are coats @1'', and are distinguished by setting the interval between the two pulses to, for example, 2 ms.

FIG. 4 shows the structure of one word of the transmission command, which is composed of an M-bit code, that is, (M+13 pulses), and one M-bit code is the key input circuit (3). It is transmitted at a certain period while any one key is being input.

(The part inside is a key code part that constitutes a part of the above M-bit code, and this is used to distinguish between uses to prevent interference between the systems used.

06) is a transmission code indicating command information. FIG. 5 shows how one word of the transmission command, command W, is transmitted at a certain period.

However, in the conventional data code transmission as shown in FIG. 5, the key two 1' molecule 151 is repeatedly transmitted, which is wasteful, and one word of the transmission command becomes long, which takes time to transmit. there were.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and when transmitting a remote control signal, a 2N transmission code consisting of an N-bit transmission code and an N-bit inverted transmission code of opposite polarity is used. By transmitting the bit data code first, and then transmitting the transmission code or the inverted transmission code at a predetermined period while the transmission command of the transmission code continues, the remote control signal can be made immune to noise. It is an object of the present invention to provide a digital remote control device which is designed to be strong and strong, and to reduce the transmission time by shortening the coat length of one word of the remote control signal.

An embodiment of the present invention will be described below with reference to the drawings.

The schematic configuration of a digital remote control device according to an embodiment of the present invention is the same as that shown in FIG.

FIG. 6 shows the transmission formation of the remote control signal of the device of this embodiment. (1BH'i is an N-bit inverted transmission code A whose code polarity is opposite to that of this transmission code MA.

FIG. 7 shows an example of the configuration of a transmitting circuit in the present device, and in the figure, the same reference numerals as in FIG. 2 indicate the same or corresponding parts. (22) is an inversion logic circuit that inverts the N-bit instruction food that is the output of the instruction decoder (4) - (23) is this inversion logic circuit (2)
(21) is the shift register of N bits that reads the instruction code inverted by It is.

Next, the operation will be explained.

In this embodiment, when transmitting a remote control signal, as shown in FIG. Inverted transmission code 1 of N bits with opposite polarity to η; A Transmission code A is transmitted at a certain period.

This transmission operation will be explained in more detail. Figure 7 shows the oscillation circuit (1) and timing generator (2).
) and the key input circuit (3) to create instruction information, which is converted into an N-bit instruction code by an instruction decoder (4).

This N-bit instruction code is input to the OR logic circuit (2) and the inversion logic circuit 22+. At this time, the bit shift register (23) once reads a code with a polarity opposite to the instruction code output from the inversion logic circuit (22), and outputs it to the OR logic circuit (241).Therefore, this OR logic As the output of the circuit example, a code with mutually opposite polarity of bits is successively obtained for each, and this 2N-bit code is sent once to the code modulation circuit (the first time). A reset circuit (2
1) Rub the inactive φ. In this way, it becomes possible to send a transmission command as shown in FIG.

In the device of this embodiment, the first transmission (here -
Since the 2N-bit data codes A and A are continuously sent out, the remote control signal is extremely resistant to noise. This is because even if noise mixes into transmission code A and it becomes transmission code B, there is a very small possibility that at the same time the inverted transmission code A becomes transmission code B, which has the opposite polarity to the above transmission code B. . In this way, the remote control signal is extremely resistant to noise, so after sending a transmission command, in order to convey that the commands are continuous, only the N-bit transmission code A must be sent at a specific period. There is no need to repeatedly transmit the data code including the key code part as in the past.

Therefore, the transmission time can be significantly shortened.

In the above embodiment, the transmission code is transmitted at a predetermined period while the transmission commands continue, but an inverted transmission code may be transmitted at a predetermined period.

As described above, according to the present invention, when transmitting the %IJ remote control signal, the transmission code F and the inverted transmission code Y of mutually opposite polarities of tLN bits are successively transmitted, and then the transmission While the transmission command of call r continues, the above transmission code V or l is transmitted at a predetermined period, so that the transmission command 11 control signal is suppressed from noise (2 In addition, one word of the transmission command can be made up of the number of bits of the transmission code alone, and the transmission time can be significantly shortened. Sieve digital +
7. Effectiveness that allows you to cheaply install 1q of mote control devices (
be.

Figure 3 is a block diagram of the circuit; Figure 3 shows the bit data of °υ*@i+'' that creates the C's data code; Figure 4 is a configuration diagram of one word of the transmission command; Figure 5 is the conventional transmission command. FIG. 6 is a diagram showing the transmission format of a transmission command according to an embodiment of the present invention. FIG. 7 is a block diagram of a transmission circuit of a digital remote control device according to an embodiment of the present invention. It is.

(10)...Transmission circuit, (171...Transmission code g-
(181...Reverse transmission code)-@)...Reception circuit.

Note that the same symbol in the figure indicates the same or equivalent part.

Agent Masuo Oiwa Figure 1

Claims (1)

[Claims] (1) A digital remote control equipped with a transmitting circuit that encodes and (IIJL-modulates) command information and sends it out as a digital remote control signal, and a receiving circuit that demodulates the transmitted remote control signal and decodes the command. In the device, the transmitting circuit first transmits a 2N-bit data code consisting of an N-bit transmission code and a reverse-bit transmission code with the opposite polarity to the transmission code, and then the command of the transmission code is transmitted. While the above transmission cord is continuous, the transmission hood can be reversed again.