Appeal No. 95-1901
Application 08/088,397
The invention relates to a remote control system for the
wireless transmission of operating commands using infrared light.
In particular, Appellant discloses that the remote control system
(transmitter 1 shown in Figure 1) transmits a biphase signal TD
to an apparatus (receiver 2 shown in Figure 1). Appellant
discloses on page 7 of the specification that Figure 4B shows a
time diagram of the biphase signal TD which is generated by the
encoding circuit 15 of transmitter 1 shown in Figure 1. Each
biphase bit comprises a first bit interval 40 in which the
biphase signal has the logic value of the corresponding bit
message and a second bit interval 41 in which the biphase signal
has the inverted value. The first and second bit intervals
combined constitute the bit period. The biphase signal TD shown
in Figure 4B comprises a biphase state bit 42 of the value "1" in
the form of a marking bit with bit period 2T. On page 8 of the
specification, Appellant discloses that the decoder 22 of the
receiver 2 shown in Figure 2 distinguishes the marking bit from
the other bits by detecting the second interval of the marking
bit which is equal to the bit period T of the other bits.
The independent claim 15 is reproduced as follows:
15. A transmitter for use in a remote control system, the
transmitter comprising:
2
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Last modified: November 3, 2007