Denso Corporation

Nippondenso Co., Ltd.

Junshi Utsu

Muneaki Matsumoto

Nobuyuki Yokota

Masao Kodera

Seishin Mikami

Norifumi Matsukawa

A vehicle periphery monitoring apparatus detects the presence of a moving object along a vehicle periphery. The apparatus sets multiple detection lines along a horizontal axis of an image captured by a camera, and detects a brightness change of a pixel along the detection lines. With reference to the brightness change detected along the detection line and a parameter for determining whether such brightness change is caused by the moving object, the apparatus determines the presence of the moving object. In addition, the apparatus changes a determination condition for determining the moving object such that as the number of detection lines along which the brightness change is detected decreases, the harder it is to satisfy the determination condition for determining that the moving object is present.

Vehicle periphery monitoring apparatus

A vehicle periphery monitoring apparatus displays a detection line on a display unit, with side portions of the detection line positioned on far-off spots that are farther than a spot on which a center portion of the detection line is positioned. In addition, based on the distance of the respective spots on which the portions of the detection line are positioned, the apparatus includes a parameter table that defines different parameters for a short distance portion, a middle distance portion, and a long distance portion of the detection line. The apparatus detects a moving object based on an actual-detected brightness change of a pixel along the detection line and a predefined brightness change of a pixel along the detection line that is defined by the parameter of the parameter table.

A rearward view assistance apparatus in a vehicle includes an imaging device that acquires a vehicle rearward image by taking a rearview from the vehicle, a control circuit that sets a cropped image by cropping part of the vehicle rearward image in response to a state of a vehicle, and a display device that is provided in a passenger compartment and displays the cropped image. The control circuit preferably overlays a lower portion of the cropped image with a mask. The control circuit preferably displays an indication corresponding to a rear portion of the vehicle on the cropped image. The rearward view assistance apparatus is thus provided to view rearward from the vehicle even when passengers are present on the seats in the second and third rows.

Rearward view assistance apparatus displaying cropped vehicle rearward image

A high-frequency amplifier has a semiconductor element for amplifying a high-frequency signal, an input matching circuit connected to an input side of the semiconductor element, and an output matching circuit connected to an output side of the semiconductor element. A stabilizing circuit is connected to at least one of a signal input path between the input matching circuit and the semiconductor element, and a signal output path between the semiconductor element and the output matching circuit. The stabilizing circuit includes a first element having a first end which is short-circuited with respect to a high frequency, a parallel resonant circuit connected in series with a second end of the first element and performing parallel resonance at an operating frequency of the high-frequency amplifier, and a second element connected to a side of the parallel resonant circuit which is opposite to the first element. Values of the first element and the second element are chosen so that an admittance of the high-frequency amplifier which occurs at a frequency of possible oscillation of the high-frequency amplifier will be within a constant-conductance circle in a Smith chart which denotes a stable condition of the high-frequency amplifier.

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Nagoya, Japan

Junshi Utsu