Switched pixel visible light transmitting method, apparatus and program
First Claim
1. A transmitting method of transmitting a visible light signal by way of luminance change, the transmitting method comprising:
- determining a luminance change pattern to transmit the visible light signal;
switching a common switch according to the luminance change pattern, the common switch being for turning ON a plurality of light sources in common, the plurality of light sources being included in a light source group of a display and each light source representing a pixel in an image; and
turning ON a first pixel switch for turning ON a first light source, to cause the first light source to be ON only for a period in which the common switch is ON and the first pixel switch is ON, to transmit the visible light signal, the first light source being one of the plurality of light sources included in the light source group,wherein, in the determining, the luminance change pattern is determined for each symbol,in the turning ON of a first pixel switch, the first pixel switch is switched in synchronization with a period for transmitting the symbol, andin the turning ON of a first pixel switch, when the image is displayed on the display, the first pixel switch is switched to increase a lighting period that corresponds to the first light source, by a length of time equivalent to a period in which the first light source is OFF for transmission of the visible light signal, the lighting period being a period for representing a pixel value of a pixel in the image.
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Accused Products
Abstract
In a transmitting method that enables communication between various devices including devices other than lightings, a luminance change pattern is determined by modulating a visible light signal, a common switch for turning ON, in common, a plurality of light sources which are included in a light source group of a display and are each used for representing a pixel in an image is switched according to the luminance change pattern, and a first pixel switch for turning ON a first light source among the plurality of light sources included in the light source group is turned ON, to cause the first light source to be ON only for a period in which the common switch is ON and the first pixel switch is ON, to transmit the visible light signal.
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Citations
8 Claims
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1. A transmitting method of transmitting a visible light signal by way of luminance change, the transmitting method comprising:
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determining a luminance change pattern to transmit the visible light signal; switching a common switch according to the luminance change pattern, the common switch being for turning ON a plurality of light sources in common, the plurality of light sources being included in a light source group of a display and each light source representing a pixel in an image; and turning ON a first pixel switch for turning ON a first light source, to cause the first light source to be ON only for a period in which the common switch is ON and the first pixel switch is ON, to transmit the visible light signal, the first light source being one of the plurality of light sources included in the light source group, wherein, in the determining, the luminance change pattern is determined for each symbol, in the turning ON of a first pixel switch, the first pixel switch is switched in synchronization with a period for transmitting the symbol, and in the turning ON of a first pixel switch, when the image is displayed on the display, the first pixel switch is switched to increase a lighting period that corresponds to the first light source, by a length of time equivalent to a period in which the first light source is OFF for transmission of the visible light signal, the lighting period being a period for representing a pixel value of a pixel in the image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmitting apparatus that transmits a visible light signal by way of luminance change, the transmitting apparatus comprising:
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a memory storing instructions; a processor, when executing the instructions stored in the memory, that performs operations comprising; determining a luminance change pattern to transmit the visible light signal; switching a common switch according to the luminance change pattern, the common switch being for turning ON a plurality of light sources in common, the plurality of light sources being included in a light source group of a display and each light source representing a pixel in an image; and turning ON a pixel switch for turning ON a light source to be controlled, to cause the light source to be ON only for a period in which the common switch is ON and the pixel switch is ON, to transmit the visible light signal, the light source being one of the plurality of light sources included in the light source group, wherein, in the determining, the luminance change pattern is determined for each symbol, in the turning ON of a pixel switch, the pixel switch is switched in synchronization with a period for transmitting the symbol, and in the turning ON of a pixel switch, when the image is displayed on the display, the pixel switch is switched to increase a lighting period that corresponds to the light source, by a length of time equivalent to a period in which the light source is OFF for transmission of the visible light signal, the lighting period being a period for representing a pixel value of a pixel in the image.
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8. A program recorded on a non-transitory computer-readable recording medium, for transmitting a visible light signal by way of luminance change, the program causing a computer to execute:
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determining a luminance change pattern to transmit the visible light signal; switching a common switch according to the luminance change pattern, the common switch being for turning ON a plurality of light sources in common, the plurality of light sources being included in a light source group of a display and each light source representing a pixel in an image; and turning ON a pixel switch for turning ON a light source to be controlled, to cause the light source to be ON only for a period in which the common switch is ON and the pixel switch is ON, to transmit the visible light signal, the light source being one of the plurality of light sources included in the light source group, wherein, in the determining, the luminance change pattern is determined for each symbol, in the turning ON of a pixel switch, the pixel switch is switched in synchronization with a period for transmitting the symbol, and in the turning ON of a pixel switch, when the image is displayed on the display, the pixel switch is switched to increase a lighting period that corresponds to the light source, by a length of time equivalent to a period in which the light source is OFF for transmission of the visible light signal, the lighting period being a period for representing a pixel value of a pixel in the image.
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Specification