TRANSMITTING METHOD, TRANSMITTING APPARATUS, AND PROGRAM
First Claim
1. A transmitting method for transmitting a visible light signal by changing luminance of a light emitter, the transmitting method comprising:
- determining a pattern of change in luminance of the light emitter by modulating a signal; and
transmitting the visible light signal by changing luminance of a red color represented by a light source included in the light emitter according to the determined pattern,wherein the visible light signal includes data, a preamble, and a payload,in the data, a first luminance value and a second luminance value less than the first luminance value appear along a time axis, and a time length in which at least one of the first luminance value and the second luminance value is maintained is less than or equal to a first predetermined value,in the preamble, the first luminance value and the second luminance value appear alternately along the time axis, andin the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than the first predetermined value and is determined in accordance with the signal and a predetermined method.
1 Assignment
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Accused Products
Abstract
A transmitting method for enabling transmission of a visible light signal in short time includes: determining a pattern of change in luminance of the light emitter by modulating a signal; and transmitting the visible light signal by changing luminance of a red color represented by a light source according to the determined pattern. The visible light signal includes data, a preamble, and a payload. In the data, a first luminance value and a second luminance value appear along a time axis. In the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than a first predetermined value and is determined in accordance with the signal and a predetermined method.
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Citations
9 Claims
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1. A transmitting method for transmitting a visible light signal by changing luminance of a light emitter, the transmitting method comprising:
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determining a pattern of change in luminance of the light emitter by modulating a signal; and transmitting the visible light signal by changing luminance of a red color represented by a light source included in the light emitter according to the determined pattern, wherein the visible light signal includes data, a preamble, and a payload, in the data, a first luminance value and a second luminance value less than the first luminance value appear along a time axis, and a time length in which at least one of the first luminance value and the second luminance value is maintained is less than or equal to a first predetermined value, in the preamble, the first luminance value and the second luminance value appear alternately along the time axis, and in the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than the first predetermined value and is determined in accordance with the signal and a predetermined method. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmitting apparatus which transmits a visible light signal by changing luminance of a light emitter, the transmitting apparatus comprising:
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a determination unit configured to determine a pattern of change in luminance of the light emitter by modulating a signal; and a transmission unit configured to transmit the visible light signal by changing luminance of a red color represented by a light source included in the light emitter according to the determined pattern, wherein the visible light signal includes data, a preamble, and a payload, in the data, a first luminance value and a second luminance value less than the first luminance value appear along a time axis, and a time length in which at least one of the first luminance value and the second luminance value is maintained is less than or equal to a first predetermined value, in the preamble, the first luminance value and the second luminance value appear alternately along the time axis, and in the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than the first predetermined value and is determined in accordance with the signal and a predetermined method.
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9. A program for transmitting a visible light signal by changing luminance of a light emitter, the program causing a computer to execute:
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determining a pattern of change in luminance of the light emitter by modulating a signal; and transmitting the visible light signal by changing luminance of a red color represented by a light source included in the light emitter according to the determined pattern, wherein the visible light signal includes data, a preamble, and a payload, in the data, a first luminance value and a second luminance value less than the first luminance value appear along a time axis, and a time length in which at least one of the first luminance value and the second luminance value is maintained is less than or equal to a first predetermined value, in the preamble, the first luminance value and the second luminance value appear alternately along the time axis, and in the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than the first predetermined value and is determined in accordance with the signal and a predetermined method.
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Specification