Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2000-01-28
2001-05-15
Negash, Kinfe-Michael (Department: 2733)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S199200, C359S199200, C369S013010, C369S014000, C369S032010, C386S349000, C386S349000, C386S349000
Reexamination Certificate
active
06233079
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a signal transfer apparatus, and more particularly to a light-signal transmitting apparatus, a light-signal receiving apparatus, a light-signal transfer apparatus and a light-signal transfer method with which a signal reproduced by audio equipment of video equipment is emitted to a space as a light signal, such as an infrared ray to transfer the signal to the other audio equipment or the video equipment.
2. Related Art of the Invention
Audio equipment, such as a digital audio disk reproducing apparatus, is sometimes provided with a light-signal transfer apparatus using, for example, an infrared ray to permit a user to easily operate the apparatus. The light-signal transfer apparatus, which is provided for the audio equipment, has a light emitting diode arranged to be operated in response to an audio signal to emit, to a space, an infrared ray having an intensity corresponding to the level of the audio signal. The emitted infrared ray is transferred to a receiving apparatus. The receiving apparatus having a light receiving device arranged to receive the infrared ray to demodulate the audio signal so as to reproduce the audio signal through a loud speaker unit, earphone or the like.
However, the light-signal transfer apparatus using the infrared ray must be structured as shown in
FIG. 1
in such a manner that a light signal S
1
is directly emitted from a light emitting portion
1
to a light receiving portion
2
. That is, the transfer passage for the infrared ray arranged to be transferred through a space must be formed into a linear shape using a direct light beam. It leads to a fact that the transfer passage is intercepted if an obstacle
3
, such as a human being, exists between the light emitting portion
1
and the light receiving portion
2
, as shown in FIG.
2
. Therefore, the light signal S
1
is blocked attributable to the interception of the transfer passage, thus causing a problem to arise in that the audio signal cannot be transferred.
In view of the foregoing, an object of the present invention is to provide a light-signal transmitting apparatus, a light-signal receiving apparatus, a light-signal transfer apparatus and a light-signal transfer method each of which is capable of continuously reproducing signals even if the transfer passage is temporarily intercepted.
SUMMARY OF THE INVENTION
To achieve the above-mentioned problems, a light-signal transmitting apparatus according to the present invention includes: dividing means for dividing a supplied signal into first and second transfer signals having the same contents as those of the supplied signal; delay means for delaying the second transfer signal by a predetermined time; and transmitting means for converting the first transfer signal and the second transfer signal delayed by the delay means into light signals and emitting the light signals into a space.
The light-signal transmitting apparatus divides the supplied signal into the two same signals to delay either of the two signals and converts the two signals into light signals to be transferred.
A light-signal transmitting apparatus according to the present invention includes: reproducing means for reproducing data recorded on a recording medium; storage means for temporarily storing data reproduced by the reproducing means; write control means for controlling the reproducing means to administrate data stored on the storage means; a first reading portion for reading data stored on the storage means; a second reading portion for reading, from data read from the first reading portion, data stored on the storage means preceding to data read from the first reading portion; read control means for generating a transfer signal obtained by multiplexing two data items read from the first reading portion and the second reading portion; and transmitting means for converting the transfer signal into a light signal and emitting the light signal to the space.
The light-signal transmitting apparatus according to the present invention is arranged to temporarily store data reproduced from the recording medium on the storage means. The light-signal transmitting apparatus multiplexes data usually read from the storage means and data read prior to data read usually to convert the multiplexed signal into a light signal so as to transfer the light signal.
A light-signal receiving apparatus according to the present invention includes: receiving means for receiving a first light signal emitted to a space and a second light signal having the same transfer contents as those of the first light signal and emitted to the space after a predetermined time has elapsed and converting the first and second light signals into a first transfer signal and a second transfer signal having the same transfer contents as those of the first transfer signal and delayed by a predetermined time, the first and second transfer signals corresponding to the first and second light signals; delay means for making coincide the time base of the second transfer signal and that of the transfer contents by delaying the first transfer signal by a predetermined time; and signal selection means for selecting the first transfer signal or the second transfer signal in accordance with the quality of the first transfer signal delayed by the delay means by the predetermined time and that of the second transfer signal.
The light-signal receiving apparatus according to the present invention receives a signal obtained by dividing a supplied signal into two same signals, by delaying either of the two signals, by converting the two signals into light signals and by transferring the light signals to select either of the two signals having superior quality.
A light-signal transfer apparatus according to the present invention includes: a light-signal transmitting apparatus having transmission-signal dividing means for dividing a supplied signal into first and second transfer signals each having the same contents as those of the supplied signal; transmission-signal delay means for delaying the second transfer signal by a predetermined time; transmitting means for converting the first transfer signal and the second transfer signal delayed by the delay means into light signals to emit the light signals into a space; and a light-signal receiving apparatus having receiving means for receiving the light signals emitted to the space from the light-signal transmitting apparatus to reproduce the first and second transfer signals; received-signal delay means for making coincide the time base of the second transfer signal and that of the transfer contents by delaying the first transfer signal by a predetermined time; and signal selection means for selecting the first transfer signal or the second transfer signal in accordance with the quality of the first transfer signal delayed by the received-signal delay means by the predetermined time and that of the second transfer signal.
The light-signal transfer apparatus according to the present invention has the light-signal transmitting apparatus which divides a supplied signal into two same signals and delays either of the two signals to convert the signals into light signals. The light-signal receiving apparatus receives the signals to select either of the two signals having superior quality.
A light-signal transfer apparatus according to the present invention includes: a light-signal transmitting apparatus having order exchanging means arranged to be supplied with time sequential signals composed of units formed by sectioning data into predetermined time regions and structured to generate a transfer signal subjected to an interleaving process with which the time sequential order of the units of the time sequential signals is exchanged and a light-signal transmitting apparatus for converting the transfer signal into a light signal to emit the light signal to a space; a light-signal receiving apparatus having receiving means for receiving the light signal emitted to the space from the light-signal transmitti
Negash Kinfe-Michael
Sonnenschein Nath & Rosenthal
Sony Corporation
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