Remote control receiver
First Claim
1. A remote control receiver comprising:
- a receiver which receives a remote control signal in which one frame is composed of a header representing a value “
1”
, a part with no signal representing a value “
0”
, and a data part with a plurality of bits representing a value “
1”
or “
0”
;
a detector which detects the length of the header in each frame of said remote control signal received by said receiver;
a waveform shaper for delaying a point where said remote control signal rises from “
0”
to “
1”
by a preset time, and delaying a point where said remote control signal falls from “
1”
to “
0”
to a point where said remote control signal would rise normally in accordance with the length of the header detected by said detector;
wherein said remote control signal is made a uniform length; and
wherein said detector detects the length of the headers and sorts the detected length into three, and said waveform shaper adjusts a time for delaying a point where said remote control signal falls from “
1”
to “
0”
in accordance with the sort of the detected length.
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Accused Products
Abstract
The back end position of a pulse, which is transmitted from a remote control, varies according to the transmission distance, and the pulse width changes. A remote control receiver of the present invention detects the pulse width of a header, which is formed at the head of each frame in a remote control signal from the remote control, so as to detect the transmission distance of the remote control signal and a change in back end position of each pulse in a data part, which is transmitted after the header. Then, the back end position of each pulse is corrected to original. This eliminates the change in pulse width resulting from a change in transmission distance, and increases the allowable range of the transmission distance of the remote control.
12 Citations
2 Claims
-
1. A remote control receiver comprising:
-
a receiver which receives a remote control signal in which one frame is composed of a header representing a value “
1”
, a part with no signal representing a value “
0”
, and a data part with a plurality of bits representing a value “
1”
or “
0”
;
a detector which detects the length of the header in each frame of said remote control signal received by said receiver;
a waveform shaper for delaying a point where said remote control signal rises from “
0”
to “
1”
by a preset time, and delaying a point where said remote control signal falls from “
1”
to “
0”
to a point where said remote control signal would rise normally in accordance with the length of the header detected by said detector;
wherein said remote control signal is made a uniform length; and
wherein said detector detects the length of the headers and sorts the detected length into three, and said waveform shaper adjusts a time for delaying a point where said remote control signal falls from “
1”
to “
0”
in accordance with the sort of the detected length.- View Dependent Claims (2)
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Specification
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- Resources
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Current AssigneeOptec (Verado Holdings, Inc.)
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Original AssigneeOptec (Verado Holdings, Inc.)
-
InventorsNakanishi, Yutaka
-
Primary Examiner(s)Chin, Stephen
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Assistant Examiner(s)Ha, Dac V.
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Application NumberUS09/102,086Time in Patent Office953 DaysField of Search375/340, 375/342, 375/360, 375/362, 375/364, 375/365, 375/368, 375/238, 375/239, 370/205, 370/508, 370/519US Class Current375/238CPC Class CodesA63F 2300/1025 details of the interface wi...G08C 19/28 using pulse codeG08C 23/04 using light waves, e.g. inf...
