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US 12,212,370 B2Granted
Light receiving device and communication device
AssigneeNEC Corporation
InventorsToshiki Imamura, Koya Takata, Fujio Okumura
Life of this patent
Estimating the term…
Abstract
A light receiving device that includes a lens that collects a spatial light signal, a sensor array including a plurality of light receivers that receives the spatial light signal collected by the lens, and a reception unit that integrates an electric signal derived from the spatial light signal received by each of the plurality of light receivers and selects a light receiver that receives the spatial light signal. according to a voltage value of the integrated electric signal.
Claims6
A light receiving device comprising:
- a lens that collects a spatial light signal;
- a sensor array including a plurality of light receivers that receives the spatial light signal collected by the lens, light receiving faces of the plurality of light receivers are disposed in an array on a same plane in a same direction, the light receiving faces of the plurality of light receivers are located between a main surface and a focal surface of the lens;
- a plurality of first processing circuits that are associated with the plurality of respective light receivers, amplifies the electric signals derived from the spatial light signal received by the plurality of respective light receivers, and integrates each of the electric signals;
- a selector that receives the electric signals amplified by the first processing circuits and that selectively outputs at least any one of the received electric signals;
- a second processing circuit that decodes the electric signal output from the selector;
- a memory that is configured to store instructions;
- and
- a processor that is configured to execute the instructions to:
- cause an integrator to integrate an electric signal derived from the spatial light signal received by each of the plurality of light receivers;
- cause the selector to select a light receiver, from among the plurality of light receivers, that receives the spatial light signal according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits;
- cause the selector to allocate the electric signal from the selected light receiver to any one of a plurality of the second processing circuits;
- in a case where the spatial light signal from each of a plurality of light transmission sources is received by a plurality of the light receivers adjacent to each other, execute the instructions to cause the selector to select a light receiver that receives the spatial light signal for each of the light transmission sources according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits;
- and
- in a case where the processor is not allowed to select a light receiver that receives the spatial light signal for each of the light transmission sources according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits, execute the instructions to cause the same light receiver to receive the spatial light signal in a time division manner for each of the light transmission sources.
11 more elements
A communication device comprising:
- a light reception apparatus including a lens that collects a first spatial light signal transmitted from at least one communication target and a sensor array including a plurality of light receivers that receive the first spatial light signal collected by the lens, light receiving faces of the plurality of light receivers are disposed in an array on a same plane in a same direction, the light receiving faces of the plurality of light receivers are located between a main surface and a focal surface of the lens, a plurality of first processing circuits that are associated with the plurality of respective light receivers, amplifies the electric signals derived from the first spatial light signal received by the plurality of respective light receivers, and integrates each of the electric signals, a selector that receives the electric signals amplified by the first processing circuits and that selectively outputs at least any one of the received electric signals, and a second processing circuit that decodes the electric signal output from the selector;
- a light transmitter that transmits a second spatial light signal according to the first spatial light signal received by the light reception apparatus;
- and
- a memory that is configured to store instructions, and
- a processor that is configured to execute the instructions to
- cause an integrator to integrate an electric signal derived from the first spatial light signal received by each of the plurality of light receivers,
- cause the selector to select a light receiver that receives the first spatial light signal according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits,
- cause the selector to allocate the electric signal from the selected light receiver to any one of a plurality of the second processing circuits,
- in a case where the first spatial light signal from each of a plurality of light transmission sources is received by a plurality of the light receivers adjacent to each other, execute the instructions to cause the selector to select a light receiver that receives the first spatial light signal for each of the light transmission sources according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits,
- in a case where the processor is not allowed to select a light receiver that receives the first spatial light signal for each of the light transmission sources according to a voltage value of the electric signal integrated by each of the plurality of first processing circuits, execute the instructions to cause the same light receiver to receive the first spatial light signal in a time division manner for each of the light transmission sources,
- control the light transmitter according to the first spatial light signal received by the light reception apparatus, and
- cause the light transmitter to transmit the second spatial light signal to the at least one communication target that is a light transmission source of the first spatial light signal.
9 more elements
Dependencies are inferred from the claim text.