Abstract: According to one embodiment, a service providing system accumulates, as first context information linked to identification information of a first user, at least a part of first data detected by a first sensor worn on a body of the first user or provided in a held object of the first user. The service providing system provides a first service based on a first aggregate of the accumulated first context information to the first user.

Abstract: According to one embodiment, a service providing system accumulates, as first context information linked to identification information of a first user, at least a part of first data detected by a first sensor worn on a body of the first user or provided in a held object of the first user. The service providing system provides a first service based on a first aggregate of the accumulated first context information to the first user.

Abstract: According to one embodiment of the present disclosure, a portable terminal obtains an address for accessing a server from a signage terminal. The portable terminal generates a card for displaying a message in the signage terminal. The portable terminal transmits the card to the server. The signage terminal displays the card received from the server.

Abstract: According to one embodiment of the present disclosure, a portable terminal obtains an address for accessing a server from a signage terminal. The portable terminal generates a card for displaying a message in the signage terminal. The portable terminal transmits the card to the server. The signage terminal displays the card received from the server.

Abstract: According to one embodiment of the present disclosure, a portable terminal obtains an address for accessing a server from a signage terminal. The portable terminal generates a card for displaying a message in the signage terminal. The portable terminal transmits the card to the server. The signage terminal displays the card received from the server.

Abstract: According to one embodiment of the present disclosure, a portable terminal obtains an address for accessing a server from a signage terminal. The portable terminal generates a card for displaying a message in the signage terminal. The portable terminal transmits the card to the server. The signage terminal displays the card received from the server.

Abstract: According to one embodiment, a transmission system includes a transmitter, and a receiver. The transmitter includes one or a plurality of light sources, a modulator, a first driver, a display, and a second driver. The one or a plurality of light sources is configured to emit a visible light whose light amount corresponds to a first drive signal. The modulator is configured to, according to transmission data to be transmitted from the transmitter to the receiver, modulate a first luminance signal indicative of an amount of the light the light source is configured to emit, to generate a second luminance signal. The first driver is configured to generate the first drive signal based on the second luminance signal. A mean of the second luminance signal during one frame in the input video signal is substantially equal to a value of the first luminance signal in the frame.

Abstract: According to one embodiment, an optical device includes emission of an image projecting light source and emission of an optical path length measuring light source are provided by a light projecting device and respective beams are directed to a moveable mirror. In accordance with the movement of moveable mirror, an image projecting light scans a target and an image is displayed. Reflected light is scattered from the target and reaches a photodetector. By calculating the time difference of reference light and reflected light detected by the photodetector, the distance of the optical device and a reflection point of an optical path length measuring light is computed. By combining the computed optical path length data and angle data of the moveable mirror, the reflecting point of the optical path length measuring light is determined.

Abstract: According to one embodiment, an optical device includes emission of an image projecting light source and emission of an optical path length measuring light source are provided by a light projecting device and respective beams are directed to a moveable mirror. In accordance with the movement of moveable mirror, an image projecting light scans a target and an image is displayed. Reflected light is scattered from the target and reaches a photodetector. By calculating the time difference of reference light and reflected light detected by the photodetector, the distance of the optical device and a reflection point of an optical path length measuring light is computed. By combining the computed optical path length data and angle data of the moveable mirror, the reflecting point of the optical path length measuring light is determined.

Abstract: According to one embodiment, a transmission system includes a transmitter, and a receiver. The transmitter includes one or a plurality of light sources, a modulator, a first driver, a display, and a second driver. The one or a plurality of light sources is configured to emit a visible light whose light amount corresponds to a first drive signal. The modulator is configured to, according to transmission data to be transmitted from the transmitter to the receiver, modulate a first luminance signal indicative of an amount of the light the light source is configured to emit, to generate a second luminance signal. The first driver is configured to generate the first drive signal based on the second luminance signal. A mean of the second luminance signal during one frame in the input video signal is substantially equal to a value of the first luminance signal in the frame.