EP0091271A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data transmission apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1983-03-30
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Granted: —
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Expires: 2003-03-30
Abstract
Abstract A data transmission apparatus provided with a processor (12), optical receivers (19a, 19b, 21a, 21b) and optical transmitters (18a, 18b, 20a, 20b) at the processor side within a room (63, 64), which are connected to the input line and output line of the processor (12) respectively, terminal equipment (13, 14a, 14b, 14c, 15a, 15b, 15c, 16), and optical receivers (19c, 19d, 19e, 19f, 21c. 21d, 21e, 21f) and optical transmitters (18c, 18d, 18e, 18f, 20c, 20d, 20e, 20f) at the terminal equipment side in the room (63, 64), which are connected to the input lines and output lines of the terminal equipments respectively, so that data transmission between the terminal equipment (13, 14a, 14b, 14c, 15a, 15b, 15c, 16) and the processor (12) is performed without words by light propagation through space between the optical transmitters (18c-18f, 20c-20f) at the terminal equipment side and the optical receivers (19a, 19b, 21a, 21b) at the processor side and between the optical transmitters (18a, 18b, 20a, 20b) at the processor side and the optical receivers (19c-19f, 21c-21f) at the terminal equipment side.
Inventors
- 👤 Toru Higashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/11; H04B10/114; H04B10/1149
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A data transmission apparatus provided with a processor, optical receivers and optical transmitters, which are disposed at the processor side and connected to an input line and output line of said.processor respectively, terminal equipments, and optical receivers and optical transmitters, which are disposed at the terminal equipment side and connected to input lines and output lines of said terminal equipments respectively, so that data transmission between said terminal equipments and said processor is performed wirelessly by light propagation through space between said optical transmitters at the terminal equipment side and said optical receivers at the processor side, and between said optical transmitters at the processor side and said optical receivers at the terminal equipment side.
Claim 2
Dependent Claim
115 words
A data transmission apparatus provided with a processor, optical receivers and optical transmitters, which are disposed at the processor side and connected to an input line and output line of said.processor respectively, terminal equipments, and optical receivers and optical transmitters, which are disposed at the terminal equipment side and connected to input lines and output lines of said terminal equipments respectively, so that data transmission between said terminal equipments and said processor is performed wirelessly by light propagation through space between said optical transmitters at the terminal equipment side and said optical receivers at the processor side, and between said optical transmitters at the processor side and said optical receivers at the terminal equipment side.
Claim 3
Dependent Claim
73 words
A data transmission apparatus according to claim 1, wherein when the frequency of modulation carrier wave for said optical receivers at the terminal equipment side and optical transmitters at the processor side is represented by f 1 and the frequency of modulation carrier wave for said optical transmitters at the terminal equipment side and optical receivers at the processor side by f 2 , a relation of f 1 f 2 is set.
Claim 4
Dependent Claim
79 words
A data transmission apparatus according to claim 1, wherein a plurality of terminal equipments having optical transmitters and optical receivers at the terminal equipment side, are disposed in one room, and a plural sets of optical transmitters and optical receivers are disposed at the processor side within said room respectively, said transmitters and receivers performing data transmission between an optical transmitter and an optical receiver which belong to a certain terminal equipment among said plural sets of terminal equipments.
Claim 5
Dependent Claim
146 words
A data transmission apparatus according to claim 3, wherein at least one set of said optical transmitter and optical receiver among the plural sets of said optical transmitters and optical receivers at the processor side, are connected to the output line and input line of said processor through a parallel data - serial data conversion means, and the plural sets of said optical transmitters and optical receivers at the terminal equipment side, which perform the data transmission with said at least one set of optical transmitter and optical receiver at the processor side, are connected to the input line and output line of said respective terminal equipments through parallel data - serial data conversion means respectively, so that said at least one set of optical transmitter and optical receiver allow a certain terminal equipment among said plurality of terminal equipments to have access to data transmission.
Claim 6
Dependent Claim
91 words
A data transmission apparatus according to claims 1, 2, 3 or 4, wherein said optical transmitters each comprises a modulator for data, a light-emitting element driving circuit, and a light-emitting element, connected in series to each other, said optical receivers each comprises a light-sensitive element, a reception amplifier, and a.data demodulator connected in series to each other, and a modulation system for said modulator for data and data demodulator, uses a modulation system which allows at least one of phase, frequency, and amplitude of the carrier wave to carry data information.
Claim 7
Dependent Claim
73 words
A data transmission apparatus including a plurality of processors disposed in a room, said processors having a plurality of terminal equipments attached thereto and connecting at the input lines and output lines with optical receivers and optical transmitters through parallel data - serial data conversion means, so that said optical receiver and optical transmitter belonging to each of said processors, perform the data transmission between said respective processors wirelessly light propagation through space.
Claim 8
Dependent Claim
73 words
A data transmission apparatus including a plurality of processors disposed in a room, said processors having a plurality of terminal equipments attached thereto and connecting at the input lines and output lines with optical receivers and optical transmitters through parallel data - serial data conversion means, so that said optical receiver and optical transmitter belonging to each of said processors, perform the data transmission between said respective processors wirelessly light propagation through space.
Claim 9
Dependent Claim
88 words
A data transmission apparatus according to claim 6, wherein said optical transmitters each comprises a modulator for data, a light-emitting element driving circuit, and a light-emitting element, connected in series to each other, and said optical receivers each comprises a light-sensitive element, a reception amplifier, and a data demodulator connected in series to each other, and a modulation system for said modulator for data and data demodulator, employs a modulation system allowing at least one of phase, frequency and amplitude of the carrier wave to carry data information.
References Cited (Backward Citations)
No citation records indexed.
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