Koito Manufacturing Co. | Date: 2015-04-13
There is provided a vehicle lamp control apparatus including a receiver and a controller. The receive receives an output value of an inclination sensor and a signal output from at least one of a foot brake sensor, a parking brake sensor and a shift position sensor. A total angle which is an inclination angle of a vehicle with respect to a horizontal plane can be derived from the output value of the inclination sensor. The controller adjusts an optical axis angle of a vehicle lamp using the output value of the inclination sensor. The controller outputs an adjustment signal to adjust the optical axis angle of the vehicle lamp in response to change in the total amount when the vehicle is static, except for non-static load change caused by changeover in at least one of a foot brake, a parking brake and a shift position.
Koito Manufacturing Co. | Date: 2015-01-28
A resin optical member allows light to pass therethrough. The resin optical member includes a fine asperity portion formed with fine asperity structure and a flat portion not formed with fine asperity structure. The fine asperity structure include concavities or convexities formed at a pitch equal to or less than a wavelength of visible light. The fine asperity structure includes concavities or convexities having a height 37 nm or more.
Koito Manufacturing Co. | Date: 2015-08-18
A vehicle lighting device includes a light source, a projection lens, a drive circuit board, and a housing. The light source includes a light emitting surface. The projection lens faces the light emitting surface and is disposed so that at least a part of light emitted from the light source passes through the projection lens. The drive circuit board includes a circuit to control switching of the light source on and off. The housing supports the light source and the drive circuit board and defines a part of a lamp chamber which houses the projection lens. A first direction that is a normal direction to the light emitting surface intersects a second direction that is a normal direction to a main surface of the drive circuit board.
Koito Manufacturing Co. | Date: 2015-08-10
A vehicle lamp includes a projection lens and a first light source. Light emitted from the first light source is irradiated forward through the projection lens. The shade blocks a part of light from the first light source toward the projection lens to form a low beam light distribution pattern. The light emitting unit causes light to be incident onto the projection lens to form a high beam supplementary light distribution pattern. The light emitting unit includes a second light source and a transparent member. Light emitted from the second light source is incident on the transparent member. The transparent member emits the incident light from the front end surface thereof. An emission window is formed in the upper surface of the transparent member and in rear of a front edge of the upper surface. The emission window emits the light incident onto the transparent member, toward the projection lens.
Koito Manufacturing Co. | Date: 2015-09-16
Provided is a light emitting device. A semiconductor light emitting element with a peak wavelength ranging from 395 nm to 410 nm is used as a light source, light scattering particles made of a material with a band gap of 3.4 eV or more are dispersed in a dispersion medium of a reflection member, and a refractive index of the light scattering particles is larger than a refractive index of the dispersion medium by 0.3 or more. The semiconductor light emitting element has a 1 percentile value ranging from 365 nm to 383 nm in emission integrated intensity.