Abstract: An electrochromic device includes: a first electrode which transmits light; a second electrode disposed opposite the first electrode; an electrolyte located between the first electrode and the second electrode, and containing metal depositable on one of the first electrode and the second electrode, according to a potential difference between the first electrode and the second electrode; a driver which applies a predetermined potential to a target electrode which is at least one of the first electrode and the second electrode; and a controller which changes a potential application portion of the target electrode to which the predetermined potential is applied, in a potential application period during which the predetermined potential is applied.

Abstract: An electrochromic element includes: a first electrode which transmits light; a second electrode disposed opposite the first electrode; and an electrolyte containing metal and located between the first electrode and the second electrode. The metal is depositable on one of the first electrode and the second electrode, according to a voltage applied between the first electrode and the second electrode, and a second deposition voltage at which deposition of the metal on the second electrode starts is higher than a first deposition voltage at which deposition of the metal on the first electrode starts.

Abstract: There is provided a display device having an electrochromic element placed in the display device. The electrochromic element has: a light transmittance of 70% or more and a light reflectance of 20% or less at a central wavelength of a visible spectrum when in a transparent state; and a light reflectance of 65% or more at the central wavelength of the visible spectrum when in a mirror state. By this, the display device is not only highly effective in terms of light-shielding, heat blocking, screening, etc., but is also switchable between a transmissive type and a reflective type.

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.

Abstract: An apparatus is provided that includes a display, an image sensor having a plurality of exposure lines, a processor, and a memory storing a computer program, which when executed by the processor, causes the processor to perform operations. The operations include displaying a first assist image on the display, and executing a visible light communication mode. In the visible light communication mode, the operations include (i) setting a second exposure time of the image sensor so that, in an image obtained by capturing a subject by the image sensor, a plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear according to a change in luminance of the subject, (ii) obtaining a bright line image including the plurality of bright lines, and (iii) obtaining information by demodulating data specified by a pattern of the plurality of bright lines.

Abstract: An electrochromic device includes: a first electrode which transmits light; a second electrode disposed opposite the first electrode; an electrolyte located between the first electrode and the second electrode, and containing metal depositable on one of the first electrode and the second electrode, according to a potential difference between the first electrode and the second electrode; a driver which applies a predetermined potential to a target electrode which is at least one of the first electrode and the second electrode; and a controller which changes a potential application portion of the target electrode to which the predetermined potential is applied, in a potential application period during which the predetermined potential is applied.

Abstract: An electrochromic element includes: a first electrode which transmits light; a second electrode disposed opposite the first electrode; and an electrolyte containing metal and located between the first electrode and the second electrode. The metal is depositable on one of the first electrode and the second electrode, according to a voltage applied between the first electrode and the second electrode, and a second deposition voltage at which deposition of the metal on the second electrode starts is higher than a first deposition voltage at which deposition of the metal on the first electrode starts.

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: A display method for appropriately transmitting a visible light communication signal includes: a step of coding a visible light communication signal to generate an image having a striped pattern for visible light communication as a first visible light communication image; a step of displaying the image included in the video signal, in a predetermined frame; and a step of displaying a low-luminance image in the predetermined frame, and sequentially displaying the first visible light communication image, the low-luminance image being an identification image and having uniform luminance lower than average luminance of the image which is to be displayed, wherein in the step, after the image included in the video signal is displayed in the predetermined frame, each of the first identification image and the first visible light communication image is displayed in a same frame as the predetermined frame, for a period shorter than the predetermined frame.

Abstract: A display device includes: a display panel including a display screen; a backlight having a light emission surface that illuminates the display screen of the display panel from behind; a second processor that superimposes the visible light communication signals on backlight control signals generated based on the image signal; and a second controller that divides the light emission surface of the backlight into regions and establishes a period during which control of light emission in each of the regions and control for turning off the backlight in each of the regions a different time are performed based on the backlight control signals outputted by the second processor. When superimposing the visible light communication signals on the backlight control signals, the second processor does not superimpose a visible light communication signal in a period indicating an OFF state of the backlight in the backlight control signals.

Abstract: A display device includes: a display panel including a display screen; a backlight having a light emission surface that illuminates the display screen of the display panel from behind; a second processor that superimposes the visible light communication signals on backlight control signals generated based on the image signal; and a second controller that divides the light emission surface of the backlight into regions and establishes a period during which control of light emission in each of the regions and control for turning off the backlight in each of the regions a different time are performed based on the backlight control signals outputted by the second processor. When superimposing the visible light communication signals on the backlight control signals, the second processor does not superimpose a visible light communication signal in a period indicating an OFF state of the backlight in the backlight control signals.

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.

Abstract: A display method is provided that reduces the probability of communication error without causing significant deterioration of picture quality. The method includes 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 block included in a visible light communication signal, out of one or more light emission periods in which light emission is performed for displaying an image included in a video signal. The method also includes transmitting the block of the visible light communication signal by luminance changing in the specified light emission period.

Abstract: An apparatus is provided that includes a display, an image sensor having a plurality of exposure lines, a processor, and a memory storing a computer program, which when executed by the processor, causes the processor to perform operations. The operations include displaying a first assist image on the display, and executing a visible light communication mode. In the visible light communication mode, the operations include (i) setting a second exposure time of the image sensor so that, in an image obtained by capturing a subject by the image sensor, a plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear according to a change in luminance of the subject, (ii) obtaining a bright line image including the plurality of bright lines, and (iii) obtaining information by demodulating data specified by a pattern of the plurality of bright lines.

Abstract: A video display method is provided that displays, on a per frame basis, an image included in a video signal. The method includes generating a first visible light communication image by encoding a visible light communication signal, the first visible light communication image being an image having a stripe pattern for visible light communication, and displaying, in a predetermined frame, the image included in the video signal. The method also includes switching a pitch of the first visible light communication image to a different pitch, and generating a second visible light communication image. The method further includes displaying the second visible light communication image that has a stripe pattern configured with a different minimum pitch, which is different in resolution from the stripe pattern of the first visible light communication image.

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: 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 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: There is provided a display device having an electrochromic element placed in the display device. The electrochromic element has: a light transmittance of 70% or more and a light reflectance of 20% or less at a central wavelength of a visible spectrum when in a transparent state; and a light reflectance of 65% or more at the central wavelength of the visible spectrum when in a mirror state. By this, the display device is not only highly effective in terms of light-shielding, heat blocking, screening, etc., but is also switchable between a transmissive type and a reflective type.

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.