Abstract: A headlight determination apparatus includes a camera device, a target light recognition device, and a changing device. The camera device captures an image ahead of a vehicle at a predetermined frame rate. The target light recognition device recognizes target light from the image captured by the camera device. The changing device changes a wavelength of headlight of the vehicle by using a predetermined period slower than the predetermined frame rate. When the wavelength of the headlight is different from a wavelength of the target light and/or when a period of the wavelength of the headlight does not match a period of the wavelength of the target light, the target light recognition device recognizes that there is target light other than the headlight in front of the vehicle and controls light distribution of the headlight when there is target light other than the headlight in front of the vehicle.

Abstract: A present invention provide a vehicle light system which prevents low-beam headlights from being forgotten to turn on while a vehicle is traveling and is able to turn off the low-beam headlights when it is not necessary, a rotation position of a light switch includes an AUTO position, a SMALL position, and an OFF position, the light switch includes a momentary mechanism which returns a position to the AUTO position when the position is changed to the OFF position or the SMALL position, lights include the low-beam headlights and position lights, the AUTO position allows the low-beam headlights and the position lights to turn on or off depending on a brightness outside the vehicle, and a light control unit turns off the low-beam headlights and turns on the position lights when the rotation position is set to the AUTO position, the brightness outside the vehicle is lower than a predetermined value, a speed is lower than a first predetermined speed, and the rotation position is then changed to the SMALL position

Abstract: A photodetector including: a case including a light receiving surface provided on an upper surface and having a first region that transmits visible light and a second region that transmits less visible light than the first region; a printed circuit board provided to face the light receiving surface; and a plurality of electronic components provided on a light receiving surface side of the printed circuit board and including a first light receiving element configured to detect visible light. The first light receiving element is disposed at a first position of the printed circuit board exposed to the visible light transmitted through the first region. The number of mounted electronic components disposed at the first position is smaller than the number of mounted electronic components disposed at a second position of the printed circuit board other than the first position.

Abstract: A present invention provide a vehicle light system which prevents low-beam headlights from being forgotten to turn on while a vehicle is traveling and is able to turn off the low-beam headlights when it is not necessary, a rotation position of a light switch includes an AUTO position, a SMALL position, and an OFF position, the light switch includes a momentary mechanism which returns a position to the AUTO position when the position is changed to the OFF position or the SMALL position, lights include the low-beam headlights and position lights, the AUTO position allows the low-beam headlights and the position lights to turn on or off depending on a brightness outside the vehicle, and a light control unit turns off the low-beam headlights and turns on the position lights when the rotation position is set to the AUTO position, the brightness outside the vehicle is lower than a predetermined value, a speed is lower than a first predetermined speed, and the rotation position is then changed to the SMALL position

Abstract: A photodetector including: a case including a light receiving surface provided on an upper surface and having a first region that transmits visible light and a second region that transmits less visible light than the first region; a printed circuit board provided to face the light receiving surface; and a plurality of electronic components provided on a light receiving surface side of the printed circuit board and including a first light receiving element configured to detect visible light. The first light receiving element is disposed at a first position of the printed circuit board exposed to the visible light transmitted through the first region. The number of mounted electronic components disposed at the first position is smaller than the number of mounted electronic components disposed at a second position of the printed circuit board other than the first position.

Abstract: A photodetector includes: an upper case including a light receiving portion on an upper surface and a side portion extending downward from the light receiving portion; a printed circuit board facing the light receiving portion; and a lower case including a support portion configured to support the printed circuit board, an opening on one side surface and configured to allow a connector to be inserted therethrough, and a hook on another side surface. The lower case is fitted to the upper case such that at least the printed circuit board and the support portion are surrounded. The upper case has a cut portion configured to prevent interference with the hook when being attached. At least part of the side portion adjacent to the cut portion and on a side of the opening extends up to a lower side of the opening.

Abstract: A present invention provide a vehicle light system which prevents low-beam headlights from being forgotten to turn on while a vehicle is traveling and is able to turn off the low-beam headlights when it is not necessary, a rotation position of a light switch includes an AUTO position, a SMALL position, and an OFF position, the light switch includes a momentary mechanism which returns a position to the AUTO position when the position is changed to the OFF position or the SMALL position, lights include the low-beam headlights and position lights, the AUTO position allows the low-beam headlights and the position lights to turn on or off depending on a brightness outside the vehicle, and a light control unit turns off the low-beam headlights and turns on the position lights when the rotation position is set to the AUTO position, the brightness outside the vehicle is lower than a predetermined value, a speed is lower than a first predetermined speed, and the rotation position is then changed to the SMALL position