Abstract: A communication apparatus includes a transmission path arranged on a substrate, a signal source connected to an input portion of the transmission path, a metal member configured to function as a ground portion for the transmission path and having a space between the metal member and the transmission path, and a termination circuit configured to terminate the transmission path, wherein the termination circuit is arranged on a surface of the substrate on which the metal member is arranged.

Abstract: A communication apparatus includes a first substrate including a first transmission line, a metal portion functioning as a ground for the first substrate, spaced apart from the first transmission line, and a first termination circuit configured to terminate the first transmission line. The first substrate is fixed to any one of surfaces of the metal portion other than a surface where the first transmission line is disposed.

Abstract: A communication system includes a transmission unit configured to output a signal, an attenuation unit configured to attenuate the signal output from the transmission unit, a first coupler having one end portion being connected to the transmission unit via the attenuation unit, a termination unit that is connected to the other end portion of the first coupler, and a second coupler configured to input a signal to the first coupler using at least one of electric field coupling and magnetic field coupling, wherein the first coupler or the second coupler is configured to be movable so that a relative position between the first coupler and the second coupler changes.

Abstract: A communication system configured to perform wireless communication using electromagnetic field coupling, the communication system includes a transmission circuit, at least two long couplers, a reception circuit, a short coupler, and a signal control unit, wherein the transmission circuit outputs a signal to one end of each of the at least two long couplers, wherein the reception circuit receives the signal output from the short coupler, wherein the signal is input from at least one of the at least two long couplers to the short coupler by electromagnetic field coupling, and wherein the signal control unit controls the signal output from the transmission circuit.

Abstract: In a display apparatus, a light-emitting unit emits light of a first color; a converting unit emits light of the first color, a second color, and a third color responding to irradiation of the light of the first color from the light-emitting unit; a detecting unit outputs a first detected value in accordance with brightness of the light of the first color, and a second detected value in accordance with brightness of the light of the second color; a correcting unit corrects components corresponding to the first color, the second color, and the third color of input image data, based on the first and second detected values, and a display unit displays an image on a screen by transmitting the light emitted from the converting unit, based on the corrected input image data.

Abstract: In a display apparatus, a light-emitting unit emits light of a first color; a converting unit emits light of the first color, a second color, and a third color responding to irradiation of the light of the first color from the light-emitting unit; a detecting unit outputs a first detected value in accordance with brightness of the light of the first color, and a second detected value in accordance with brightness of the light of the second color; a correcting unit corrects components corresponding to the first color, the second color, and the third color of input image data, based on the first and second detected values, and a display unit displays an image on a screen by transmitting the light emitted from the converting unit, based on the corrected input image data.