Abstract: The purpose of the present invention is to provide a feature which, even when updated data to be written to an ECU is encrypted, is capable of appropriately resuming the writing processing when determined that the writing processing was interrupted while in progress. An electronic control device according to the present invention, wherein a first data block included in the updated data is encrypted by using a second data block, and when the writing processing for writing the first data block to the storage unit is interrupted while in progress, updated data which includes both the first data block and the second data block is reacquired, after which the first data block is decoded again by using the reacquired second data block.

Abstract: The purpose of the present invention is to provide technology whereby a retransmission start address can be properly identified even when update data is compressed or encrypted. In the electronic control device according to the present invention, update data includes at least one of compressed data and encrypted data and includes unprocessed data that is neither compressed nor encrypted, and the unprocessed data retains an address list that can identify the positions of data blocks included in the update data.

Abstract: A spatial information detection device is provided, which is capable of, even under the condition that an environmental light having intensity fluctuations exists in a target space, projecting a light intensity-modulated with a predetermined modulation signal from a light emitting source into the target space, receiving light from the target space with a photodetector, and detecting spatial information of the target space from a change between the light projected from the light emitting source and the light received by the photodetector. This device has a smoothing unit configured to integrate, over a predetermined integration period, a fluctuation component in a prescribed phase zone of the modulation signal with respect to an electric charge amount generated by receiving the environmental light in the electric charge amount generated at the photodetector by receiving the light from the target space, thereby smoothing the fluctuation component.

Abstract: A spatial information detection device is provided, which is capable of, even under the condition that an environmental light having intensity fluctuations exists in a target space, projecting a light intensity-modulated with a predetermined modulation signal from a light emitting source into the target space, receiving light from the target space with a photodetector, and detecting spatial information of the target space from a change between the light projected from the light emitting source and the light received by the photodetector. This device has a smoothing unit configured to integrate, over a predetermined integration period, a fluctuation component in a prescribed phase zone of the modulation signal with respect to an electric charge amount generated by receiving the environmental light in the electric charge amount generated at the photodetector by receiving the light from the target space, thereby smoothing the fluctuation component.

Abstract: An infrared detecting device for reducing current consumption while maintaining performance is disclosed. The device includes a drive power supply circuit which comprises a current generating circuit and a distribution circuit, and which supplies a drive current to each of signal circuits comprising an I/V conversion circuit, a voltage amplification circuit, a detection circuit and an output circuit. The current generating circuit includes a reference current source, a fixed current source providing a fixed current based on the reference current and a variable current source providing a variable current stepped up or down to any different currents based on the reference current. The distribution circuit distributes the drive current to a part of the signal circuits based on the current from the fixed current source and distributes the drive current to a remaining part of the signal circuits based on the current from the variable current source.

Abstract: An infrared sensor package has a dielectric support which is molded from a plastic material to have a sensor mount for securing a pyroelectric element as well as an IC mount for securing an IC chip that processes a signal from the pyroelectric element. The support is molded over to be integral with metal parts. The metal parts include sensor conductors for interconnection of the pyroelectric element with the IC chip, and I/O conductors for interconnection of the IC chip with I/O pins. The sensor conductors as well as the I/O conductors are both molded into and integrally with the dielectric support.

Abstract: An infrared detecting device. The device includes a drive power supply circuit which supplies a drive current to each of signal circuits comprised of an I/V conversion circuit, a voltage amplification circuit, a detection circuit and an output circuit. The drive power supply circuit is comprised of a current generating circuit and a distribution circuit. The current generating circuit includes a reference current source, a fixed current source which provides a fixed current based on reference current and a variable current source which provides a variable current stepped up or down to any of different currents based on the reference current. The distribution circuit distributes the drive current to a part of the signal circuits based on the current from the fixed current source and distributes the drive current to a remaining part of the signal circuits based on the current from the variable current source.

Abstract: An infrared sensor package has a dielectric support which is molded from a plastic material to have a sensor mount for securing a pyroelectric element as well as an IC mount for securing an IC chip that processes a signal from the pyroelectric element. The support is molded over to be integral with metal parts. The metal parts include sensor conductors for interconnection of the pyroelectric element with the IC chip, and I/O conductors for interconnection of the IC chip with I/O pins. The sensor conductors as well as the I/O conductors are both molded into and integrally with the dielectric support.

Abstract: An object detecting device utilizes a pyroelectric sensor providing a sensing current, a voltage amplifier providing an amplified voltage proportional to the sensing current, and a level monitor providing a detection signal when the amplified voltage exceeds a detection threshold. The device has a standby mode where the voltage amplifier receives a limited source current to provide the voltage of low amplification, and the level monitor provides a wake-up signal when the low amplified voltage exceeds a preliminary threshold lower than the detection threshold. In response to the wake-up signal, the device is switched to an operation mode where the amplifier receives a rated source current to provide a voltage of high amplification for comparison with the detection threshold. Thus, the amplifier is kept to be less-power consuming in the absence of the wake-up signal, reducing a power requirement.

Abstract: An object detecting device utilizes a pyroelectric sensor providing a sensing current, a voltage amplifier providing an amplified voltage proportional to the sensing current, and a level monitor providing a detection signal when the amplified voltage exceeds a detection threshold. The device has a standby mode where the voltage amplifier receives a limited source current to provide the voltage of low amplification, and the level monitor provides a wake-up signal when the low amplified voltage exceeds a preliminary threshold lower than the detection threshold. In response to the wake-up signal, the device is switched to an operation mode where the amplifier receives a rated source current to provide a voltage of high amplification for comparison with the detection threshold. Thus, the amplifier is kept to be less-power consuming in the absence of the wake-up signal, reducing a power requirement.