摘要:
A position detection device for detecting positions of a non-emitter and an emitter in a detection area includes one or more reflective members disposed around the detection area, illumination light sources to emit light toward the reflective member, light receiving sensors to receive light from the reflective member and light from the light emitter, and a control device to control the illumination light sources and the light emitter. Based on previous detection statuses of the non-light emitter and the light emitter, the control device sets a time ratio of a time of a non-light emitter detection mode to a time of a light emitter detection mode, and sets timings of the non-light emitter detection mode and the light emitter detection mode.
摘要:
A coordinate detecting apparatus includes: a plurality of light-emitting and -receiving units arranged along an outer edge of the coordinate input area, the plurality of light-emitting and -receiving units each including a light-emitting part and a light-receiving part; at least one retroreflective member arranged along the outer edge of the coordinate input area; and a control unit to control the plurality of light-emitting and -receiving units to detect coordinates of a position of input made with a designation input unit in a first detection state or a second detection state.
摘要:
A projection system includes image projection apparatuses to project one image onto a projection face based on image information, a projection controller to divide the image information into a plurality of segment image data, and to instruct each of the image projection apparatuses to project corresponding segment image data, a positional deviation detector disposed at each of the image projection apparatuses to detect a positional deviation at the image projection apparatuses, an identification unit to identify which image projection apparatus requires a calibration processing; a projection unit to cause the identified image projection apparatus to project a calibration image information; an image capture apparatus to capture the calibration image information; and a calibration unit to calibrate the segment image data projected by the identified image projection apparatus based on the captured calibration image information.
摘要:
Electric power supply among a plurality of electronic devices in a system is controlled to improve efficiency in electric power conservation in the entire system. The system is provided with at least one electronic apparatus including a main power supply unit that supplies electric power from a main power source, a supplementary power source that supplies electric power being charged when electric power form the main power source is not supplied, and an interface that transmits or receives electric power to or from another electronic apparatus.