Display method
First Claim
1. A display method, comprising:
- displaying an image included in a video signal on a per frame basis;
representing a tone level of luminance of the image by controlling a light emission period in a frame, the light emission period being a period in which light emission is performed;
specifying, as a specified light emission period, a light emission period in which light emission is performed for greater than or equal to a time required for transmitting a visible light communication signal, out of one or more light emission periods in which light emission is performed for displaying the image included in the video signal, the visible light signal being transmitted by repeatedly changing in luminance of a light source from a high luminance value to a low luminance value, and from the low luminance value to the high luminance value, during the time required for transmitting; and
transmitting the visible light communication signal by superimposing the visible light communication signal onto a portion of the video signal corresponding to the specified light emission period of the video signal and repeatedly changing in luminance of the light source from the high luminance value to the low luminance value, and from the low luminance value to the high luminance value, during the specified light emission period,wherein, in the transmitting, in a case where the specified light emission period is greater than or equal to a time required for transmitting the visible light communication signal, the visible light communication signal is transmitted by luminance changing of the light source in the specified light emission period.
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Abstract
A display method is provided that includes displaying an image included in a video signal on a per frame basis, and representing a tone level of luminance of the image by controlling a light emission period in a frame. The method also includes specifying a light emission period in which light emission is performed for greater than or equal to a time required for transmitting a visible light communication signal, and transmitting the visible light communication signal by superimposing the visible light communication signal onto a portion of the video signal corresponding to the specified light emission period. The method further includes in a case where the specified light emission period is greater than or equal to a time required for transmitting the visible light communication signal, the visible light communication signal is transmitted by luminance changing of the light source in the specified light emission period.
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Citations
10 Claims
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1. A display method, comprising:
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displaying an image included in a video signal on a per frame basis; representing a tone level of luminance of the image by controlling a light emission period in a frame, the light emission period being a period in which light emission is performed; specifying, as a specified light emission period, a light emission period in which light emission is performed for greater than or equal to a time required for transmitting a visible light communication signal, out of one or more light emission periods in which light emission is performed for displaying the image included in the video signal, the visible light signal being transmitted by repeatedly changing in luminance of a light source from a high luminance value to a low luminance value, and from the low luminance value to the high luminance value, during the time required for transmitting; and transmitting the visible light communication signal by superimposing the visible light communication signal onto a portion of the video signal corresponding to the specified light emission period of the video signal and repeatedly changing in luminance of the light source from the high luminance value to the low luminance value, and from the low luminance value to the high luminance value, during the specified light emission period, wherein, in the transmitting, in a case where the specified light emission period is greater than or equal to a time required for transmitting the visible light communication signal, the visible light communication signal is transmitted by luminance changing of the light source in the specified light emission period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display device, comprising:
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a display that represents, when an image included in a video signal is displayed on a frame basis, a tone level of luminance of the image by controlling a light emission period in a frame, the light emission period being a period in which light emission is performed; a light emission period specifier that specifies, as a specified light emission period, a light emission period in which light emission is performed for greater than or equal to a time required for transmitting a separate signal that conveys communication information included in a visible light communication signal, out of one or more light emission periods in which light emission is performed for displaying the image included in the video signal, the separate signal, which conveys communication information, being transmitted by repeatedly changing in luminance from a high luminance value to a low luminance value, and from the low luminance value to the high luminance value, during the time required for transmitting; and a transmitter that transmits the separate signal, which conveys communication information, included in the visible light communication signal by superimposing the separate signal onto a portion of the video signal corresponding to the specified light emission period of the video signal and repeatedly changing in luminance from the high luminance value to the low luminance value, and from the low luminance value to the high luminance value, during the specified light emission period, wherein, in the transmitting, in a case where the specified light emission period is greater than or equal to a time required for transmitting a plurality of separate signals including the separate signal, the plurality of separate signals of the visible light communication signal are transmitted by luminance changing in the specified light emission period.
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Specification