Abstract: A display device according to the present disclosure includes: a backlight control unit configured to divide the luminescence surface of the backlight into a plurality of areas, and, based on the image signal, (i) perform luminescence control in each of the plurality of areas and (ii) set off periods starting at different times for the plurality of areas. The backlight control unit performs luminescence control in a visible light communication area which is at least one area among the plurality of areas in a period in which the visible light communication signal is output, based on the visible light communication signal, instead of performing luminescence control based on the image signal, and performs the luminescence control based on the image signal, in the visible light communication area, in a period in which the visible light communication signal is not output.

Abstract: An information processing program causes a computer to execute: encoding information to be transmitted, to determine a luminance change frequency; and outputting a signal of the determined luminance change frequency to cause a light emitter to change in luminance according to the determined luminance change frequency to transmit the information. In the encoding, each of a first frequency and a second frequency different from the first frequency is determined as the luminance change frequency. In the outputting, each of a signal of the first frequency and a signal of the second frequency is output as the signal of the determined luminance change frequency, to cause the light emitter to change in luminance according to the first frequency during a first time and change in luminance according to the second frequency during a second time different from the first time after the first time elapses.

Abstract: An information communication method of transmitting a signal is provided that uses a change in luminance. The method includes determining a plurality of patterns of the change in luminance, by modulating a respective plurality of signals to be transmitted, and transmitting, by a light emitter changing in luminance according to a pattern among the determined plurality of patterns of the change in luminance, a signal corresponding to the pattern. The plurality of signals each includes a header and a body. In the determining, a first body, a first header, and a second body are modulated as one set in stated order. In the transmitting, the light emitter changes in luminance according to, in stated order, a first luminance change pattern corresponding to the first body, a second luminance change pattern corresponding to the first header, and a third luminance change pattern corresponding to the second body.

Abstract: A display device of the present disclosure is a display device capable of outputting, by a Carousel method, a visible light communication signal including a plurality of signal units. The display device includes a display panel that displays a video signal, a visible light communication processor that encodes the signal units, divides the encoded signal units into a plurality of blocks, generates a plurality of transmission frames by using the plurality of blocks, and uses the generated transmission frames as a backlight control signal, and a backlight that illuminates the display panel from the back surface of the display panel based on the backlight control signal. With regard to the plurality of transmission frames corresponding to one of the signal units generated by the visible light communication processor, an order of the plurality of blocks is different between at least two of the transmission frames.

Abstract: An information communication method is provided for obtaining information from a subject. The method includes setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image, including the plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time. The method further includes obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image.

Abstract: An information communication method of transmitting a signal using a change in luminance is provided. The information communication method includes: determining a pattern of the change in luminance, by modulating the signal to be transmitted; and transmitting the signal, by at least one light emitter changing in luminance according to the determined pattern of the change in luminance. In the determining, a first luminance change pattern corresponding to a body, a second luminance change pattern indicating a header for specifying the body, and a third luminance change pattern indicating another header different from the header are determined. In the transmitting, the header, the body and the other header are transmitted by the at least one light emitter changing in luminance according to the first luminance change pattern, the second luminance change pattern, the first luminance change pattern and the first luminance change pattern in the stated order.

Abstract: An information communication method is provided that determines a pattern of a change in luminance by modulating a signal to be transmitted, and outputs the determined pattern to a light emitter that changes in luminance according to the determined pattern. In the method, the signal includes a first data, a first header of the first data, second data, and a second header of the second data. Additionally, the pattern of the change in luminance is determined according to in an order of (i) the first data, (ii) the first header, (iii) the first data, (iv) the second data, (v) the second header, and (vi) the second data.

Abstract: An information communication method is provided for obtaining information from a subject. The method includes receiving an ID list that includes a plurality of sets of identification information, and setting an exposure time of an image sensor so that a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image including the bright line by the image sensor capturing the subject, and obtaining the information by demodulating data specified by a pattern of the bright line included in the obtained bright line image. The method further includes searching for a channel used to broadcast the content displayed by the subject, by searching the ID list for the obtained information, and obtaining related information associated with the channel from a server.

Abstract: An information communication method that enables communication between various devices includes: setting an exposure time of an image sensor so that, in an image obtained by capturing a subject by the image sensor, a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject; obtaining a bright line image including the bright line, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and obtaining information by demodulating data specified by a pattern of the bright line included in the obtained bright line image, wherein in the obtaining of a bright line image, the bright line image is obtained by capturing light emitted from the subject and expanded by an optical system.

Abstract: An information communication method of transmitting a signal is provided that uses a change in luminance. The method includes determining a pattern of the change in luminance by modulating the signal to be transmitted, and transmitting the signal by a light emitter changing in luminance according to the determined pattern. The pattern of the change in luminance is a pattern in which one of two different luminance values occurs in each arbitrary position in a predetermined duration. The determining a pattern of change in luminance includes dividing the predetermined duration into four duration units, so that one of two different luminance value occurs in one duration unit of the four duration units and the other luminance value of the two different luminance value occurs in three duration units of the four duration units, the three duration units are other than the one duration unit.

Abstract: An information communication method of transmitting a signal using a change in luminance is provided. The information communication method includes: determining a pattern of the change in luminance, by modulating the signal to be transmitted; and transmitting the signal, by at least one light emitter changing in luminance according to the determined pattern of the change in luminance. In the determining, a first luminance change pattern corresponding to a body, a second luminance change pattern indicating a header for specifying the body, and a third luminance change pattern indicating another header different from the header are determined. In the transmitting, the header, the body and the other header are transmitted by the at least one light emitter changing in luminance according to the first luminance change pattern, the second luminance change pattern, the first luminance change pattern and the first luminance change pattern in the stated order.

Abstract: An information communication method is provided for obtaining information from a subject using a terminal device that includes an image sensor having a plurality of exposure lines. The method includes setting an exposure time of the image sensor so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image, including a plurality of bright lines, by capturing the subject that changes in luminance, and obtaining identification information of the subject. The method further includes sending the identification information to a first server, obtaining access information from the first server, sending the access information to a second server, and obtaining information from the second server.

Abstract: A communication device including an image capturing device having a RF-ID unit for performing proximity wireless communication with a RF-ID reader/writer connected via an infrared communication path to a TV. The image capturing device includes: an antenna for the proximity wireless communication; a data receiving unit receiving an input signal from the RF-ID reader/writer; a nonvolatile second memory storing at least UID and an execution program; and a data transmission unit transmitting the UID and the execution program to the RF-ID reader/writer via the antenna according to the input signal. The UID is used to identify the communication device, and the execution program is executed by the TV with reference to the UID. The transmitted UID and execution program are transferred to the TV via the RF-ID reader/writer.

Abstract: An information communication method of transmitting a signal using a change in luminance is provided. The information communication method includes: determining a pattern of the change in luminance, by modulating the signal to be transmitted; and transmitting the signal, by at least one light emitter changing in luminance according to the determined pattern of the change in luminance. In the determining, a first luminance change pattern corresponding to a body which is a part of the signal and a second luminance change pattern indicating a header for specifying the body are determined. In the transmitting, the header and the body are transmitted by the at least one light emitter changing in luminance according to the first luminance change pattern, the second luminance change pattern, and the first luminance change pattern in the stated order.

Abstract: An information communication method is provided for obtaining information from a subject using a terminal device. The method includes obtaining and holding identification information of devices, and service information associated with the identification information, from a server. The method also includes setting an exposure time of an image sensor so that a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject, and obtaining a bright line image including a plurality of bright lines. The method further includes obtaining identification information of the subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image, selecting service information associated with the identification information, and presenting the service information to a user of the terminal device.

Abstract: An information communication method includes: obtaining a first image by capturing a subject; detecting a range of the subject from the first image; determining, from among a plurality of exposure lines, predetermined exposure lines for capturing the range of the subject; setting an exposure time so that, in a second image obtained using the predetermined exposure lines, a bright line appears according to a change in luminance of the subject; obtaining the second image including the bright line, by capturing the subject that changes in luminance using the predetermined exposure lines with the set exposure time; and demodulating data specified by a pattern of the bright line included in the obtained second image.

Abstract: An information communication method that enables communication between various devices includes: determining a pattern of a change in luminance; transmitting a signal by a light emitter changing in luminance; determining a sequence of first and second image units; and displaying an image including the first and second image units arranged according to the determined sequence, wherein in the displaying: for 0, the sequence of the first and second image units is determined so that a first image unit group and a second image unit group that have a same number of image units as each other are consecutive; and for 1, the sequence of the first and second image units is determined so that a first image unit group and a second image unit group that have different numbers of image units from each other are consecutive.

Abstract: An apparatus includes a processor and a recording medium having a program, the program causing the processor to execute operations. The operations include providing a normal mode and a visible light communication mode, wherein the normal mode and the visible light communication mode are switchable. In the normal mode, first image data is obtained by image capture with a first exposure time by sequentially starting exposure for a plurality of exposure lines in an image sensor each at a different time and each of the plurality of exposure lines partially overlaps in exposure time an adjacent exposure line. In the visible light communication mode, (i) a second exposure time of the image sensor is set, (ii) a bright line image is obtained, and (iii) information is obtained by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image.

Abstract: An information communication method for use in a portable terminal, e.g., a wristwatch, to obtain information includes a light receiving step of, by at least one of plural solar cells incorporated in the portable terminal and having respective directivities, receiving visible light that is emitted in a direction corresponding to the directivity of the relevant solar cell, and an information acquisition step of obtaining information by demodulating a signal that is specified by the received visible light.

Abstract: A transmitter includes a controller, configured to generate a control voltage corresponding to a pattern of the change in an amount of light emitted wherein the pattern in which one of a plurality of amounts of light emitted occurs indicates a signal to be transmitted, and a reflector that reflects sunlight. The transmitter also includes a liquid crystal board that receives reflected light that is sunlight reflected by the reflector and transmits the signal to a receiver by changing the amount of light emitted toward the receiver according to the control voltage. The liquid crystal board changes the reflected light passing through rate to a high passing through rate when one of the plurality of the amounts of light emitted occurs, and changes the reflected light passing through rate to a low passing through rate when another one of the plurality of amounts of light emitted occurs.