Abstract: An optical distance measuring device includes a light emitting part, a mirror, a scanner that scans a predetermined scanning range with an irradiation light by operating the mirror in a forward movement motion and a backward movement motion, a light receiving part that detects a reflected light returned by reflecting the irradiation light from a target existing in the scanning range, a distance calculating part that calculates a distance to the target, a timing signal generating part that generates the timing signal according to a signal from an outside of the optical distance measuring device, and a control unit that controls a light emission of the light emitting part and an operation of the scanner. The control unit synchronizes the operation of the scanner with a predetermined timing signal by adjusting a time of one cycle of the scanner while maintaining the distance measuring period of the forward movement motion.

Abstract: A distance measuring device includes a light receiving unit and a light emitting unit. The light receiving unit includes light-receiving regions for receiving incident light and receives the incident light in units of each light-receiving region. The light emitting unit exclusively emits detection light corresponding to each light-receiving region.

Abstract: In an optical distance measuring device detecting a distance to an object, a light source is driven at a predetermined timing, and light from the light source is emitted to a predetermined range of a space, and reflected light corresponding to the emitted light is detected by at least one light receiving element. A detection signal corresponding to the reflected light is processed, and an SPAD calculation unit extracts a peak signal corresponding to the reflected light from an object. At this time, the distance to the object is measured according to the time from driving of the light source by an emission unit until output of a peak signal. At this time, performance for measurement of the distance to the object is changed depending on the state of the peak signal. This makes sensitivity appropriate when the distance to the object is optically detected.

Abstract: A communication system includes: a master; a plurality of slaves; and a bus for coupling among the master and the plurality of slaves in order to communicate asynchronously among the master and the plurality of slaves. The master supplies electricity to the bus in a power supply period. The master or the slave drives the bus for transmitting a one-bit data through the bus in a data transmission period. The power supply period and the data transmission period are successively performed so that data communication provided by a plurality of one-bit periods is performed among the master and the plurality of slaves. The master finely changes a communication frequency in the data communication. The master changes a drive level of the bus within a predetermined acceptable range in the data communication.

Abstract: A communication system includes: a master; a plurality of slaves; and a bus for coupling among the master and the plurality of slaves in order to communicate asynchronously among the master and the plurality of slaves. The master supplies electricity to the bus in a power supply period. The master or the slave drives the bus for transmitting a one-bit data through the bus in a data transmission period. The power supply period and the data transmission period are successively performed so that data communication provided by a plurality of one-bit periods is performed among the master and the plurality of slaves. The master finely changes a communication frequency in the data communication. The master changes a drive level of the bus within a predetermined acceptable range in the data communication.

Abstract: A communication system includes: a master; a plurality of slaves; and a bus for coupling among the master and the plurality of slaves in order to communicate asynchronously among the master and the plurality of slaves. The master supplies electricity to the bus in a power supply period. The master or the slave drives the bus for transmitting a one-bit data through the bus in a data transmission period. The power supply period and the data transmission period are successively performed so that data communication provided by a plurality of one-bit periods is performed among the master and the plurality of slaves. The master finely changes a communication frequency in the data communication. The master changes a drive level of the bus within a predetermined acceptable range in the data communication.

Abstract: A communication system includes a master control unit, a plurality of slave control units, and buses connecting the master control unit and the slave control units for the asynchronous communication. When the master control unit starts the communication, each slave control unit transmits a plurality of data bits represented by whether the buses be driven to the master control unit in data transmission periods assigned to the slave control units based on a start of communication, and the master control unit drives the buses to insert a period for supplying power while data bits are being transmitted in the data transmission period. The slave control unit provides a non-driving period, which stops driving the buses, at an end of the data bit transmission period.

Abstract: A communication system includes: a master; a plurality of slaves; and a bus for coupling among the master and the plurality of slaves in order to communicate asynchronously among the master and the plurality of slaves. The master supplies electricity to the bus in a power supply period. The master or the slave drives the bus for transmitting a one-bit data through the bus in a data transmission period. The power supply period and the data transmission period are successively performed so that data communication provided by a plurality of one-bit periods is performed among the master and the plurality of slaves. The master finely changes a communication frequency in the data communication. The master changes a drive level of the bus within a predetermined acceptable range in the data communication.

Abstract: A communication system includes a master control unit, a plurality of slave control units, and buses connecting the master control unit and the slave control units for the asynchronous communication. When the master control unit starts the communication, each slave control unit transmits a plurality of data bits represented by whether the buses be driven to the master control unit in data transmission periods assigned to the slave control units based on a start of communication, and the master control unit drives the buses to insert a period for supplying power while data bits are being transmitted in the data transmission period. The slave control unit provides a non-driving period, which stops driving the buses, at an end of the data bit transmission period.