Patent EP0311112A2 successfully refreshed from Google Patents.
EP0311112A2
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Remote control transmitting/receiving system
Assignee: Seiko Epson Corp
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Filing: 1988-10-07
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Granted: —
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Expires: 2008-10-07
Abstract
Abstract There is disclosed a remote control transmitting/receiving system in which a remote control transmitter (32) and a remote control receiver (33) each have a timer (20, 31); at least part of control signals consist of timer information generated from the timer (20) of the remote control transmitter. When the difference between the timer information of the control signals and the timer information of the timer (31) of the remote control receiver (33)is less than a predetermined first reference value, the remote control receiver can be controlled. This system includes means for giving an alarm when the difference between said pieces of timer information comes to a predetermined second reference value which is lower than said first reference value. The remote control transmitter and receiver have means for outputting and varying the timer information and means for setting an initial value of the timer. The receiver has means for setting a fixed code. Control signals of the transmitter are ciphered by ciphering means, and the ciphered signals are in turn deciphered by deciphering means. In this arrangement, the privacy can be protected from a copy remote controller, and the security can also be ensured.
Inventors
- 👤 Hirofumi C/O Matsushima Kogyo K.K. Yoshizawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00182; G06; G06K; G06K1/00; G06K1/12; G06K1/128; G07C2009/0023; G07C2009/00238; G07C2009/00253; G07C2009/00753; G07C2009/00769; G07C2009/00785; G07C2209/00; G07C2209/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
A remote control transmitting/receiving system having a remote control transmitter (1) for transmitting control signals each constituted by modulating a signal medium such as light, an acoustic wave, an electromagnetic wave, a voltage and an electric current, and a remote control receiver (2) for receiving said control signals, characterized in that: said remote control transmitter and receiver (1, 2) each have a timer (5, 13); at least part of said control signals is a timer information generated from said timer of said remote control transmitter (1); and said remote control receiver has a comparator for comparing the timer information of said control signals with the timer information of the timer (13) of the remote control receiver, to control the remote control receiver when the compared pieces of timer information coincide.
Claim 2
Dependent Claim
130 words
A remote control transmitting/receiving system having a remote control transmitter (1) for transmitting control signals each constituted by modulating a signal medium such as light, an acoustic wave, an electromagnetic wave, a voltage and an electric current, and a remote control receiver (2) for receiving said control signals, characterized in that: said remote control transmitter and receiver (1, 2) each have a timer (5, 13); at least part of said control signals is a timer information generated from said timer of said remote control transmitter (1); and said remote control receiver has a comparator for comparing the timer information of said control signals with the timer information of the timer (13) of the remote control receiver, to control the remote control receiver when the compared pieces of timer information coincide.
Claim 3
Dependent Claim
55 words
A system as set forth in Claim 1, wherein said remote control receiver (2) can be controlled when the difference between the timer information of the timer (5) of the remote control transmitter (1) and the timer information of the timer (13) of the remote control receiver (2) is below a predetermined first reference value.
Claim 4
Dependent Claim
37 words
A system as set forth in Claim 2, further comprising means for giving an alarm when the difference between said pieces of timer information comes to a predetermined second reference value lower than said first reference value.
Claim 5
Independent Claim
50 words
A system as set forth in any of the preceding Claims, wherein any one or both of said remote control transmitter (69) and said remote control receiver (70) includes means (72, 82) for outputting said timer information of said timer and means for varying said timer information of said timer.
Claim 6
Independent Claim
48 words
A system as set forth in any of the preceding Claims, wherein said remote control transmitter (69) is incorporated into a clock body, provided with a crystal vibrator (81) generating a fundamental oscillating frequency of a clock circuit and a fundamental oscillating frequency for modulating said signal medium.
Claim 7
Independent Claim
75 words
A system as set forth in any of the preceding Claims, wherein said remote control transmitter (1) and said remote control receiver (2) include code setting means (23, 28) for setting a fixed code which is not changed with the lapse of time, and when the timer information and the code set by said code setting means on the transmitter side coincide with those on the receiver side, said remote control receiver can be controlled.
Claim 8
Independent Claim
33 words
A system as set forth in any of the preceding Claims, wherein said remote control transmitter (69) and said remote control receiver (70) include means for setting an initial value into said timer.
Claim 9
Dependent Claim
82 words
A system as set forth in Claim 7, wherein said means for setting said initial value into the timer of said remote control transmitter (69) is means which is automatically actuated when inputting a power source, whereas said means for setting said initial value into the timer of said remote control receiver (70) is inputted by transferring means for transferring the timer information from the remote control transmitter, wherein said transferring means is allowed to function only when inputting predetermined password numbers.
Claim 10
Dependent Claim
39 words
A system as set forth in Claim 6 and 8, wherein said fixed code set by the code setting means (23) of the remote control transmitter (32) is inputted by said transferring means to said remote control receiver (33).
Claim 11
Independent Claim
48 words
A system as set forth in any of the preceding Claims, wherein the control signals of the remote control transmitter (32, 69) are ciphered by ciphering means (21, 77), and in the remote control receiver (33, 70) the ciphered control signals are deciphered by deciphering means (30, 87).
Claim 12
Independent Claim
29 words
A system as set forth in any of the preceding Claims, wherein the remote control receiver (32, 69) is capable of transferring and inputting plural pieces of timer information.
Claim 13
Dependent Claim
24 words
A system as set forth in Claim 11, wherein said remote control receiver is capable of transferring and inputting a plurality of fixed codes.
Claim 14
Independent Claim
33 words
A system as set forth in any of the preceding Claims, wherein the timers (30, 31) of said remote control transmitter (32) and remote control receiver (33) function at 100 kHz or less.
References Cited (Backward Citations)
No citation records indexed.
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