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公开(公告)号：US10661701B2
公开(公告)日：2020-05-26
申请号：US15630820
申请日：2017-06-22
发明人： Takeshi Toda , Kentarou Murakami , Masayasu Ito , Takao Muramatsu , Hidetada Tanaka , Satoshi Yamamura
IPC分类号： F21S41/00 , F21S41/39 , B60Q1/14 , B60Q1/076 , F21S41/141 , F21S41/148 , F21S41/675 , F21S41/255 , F21S41/32 , F21Y115/10 , F21W102/00
摘要： A blade receives light emitted from a light source and repeats a predetermined periodic motion to scan the front of a vehicle with reflected light of the emitted light. A position detector generates a position detection signal S4 indicating a timing at which a predetermined reference point of the blade passes a predetermined position. Based on the position detection signal S4, a period calculator calculates a period Tp of the periodic motion of the blade. A light intensity calculator receives light-distribution-pattern information S3 to be formed in front of the vehicle and calculates light intensity to be generated by the light source at each time based on the position detection signal S4 and the period Tp. A driver turns on a semiconductor light source so as to obtain the light intensity calculated by the light intensity calculator at each time.
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公开(公告)号：US10609774B2
公开(公告)日：2020-03-31
申请号：US15748997
申请日：2016-07-01
摘要： A lighting circuit includes a voltage converter configured to receive a DC voltage to perform voltage conversion and supply a drive current to a light source unit including a light emitting element, a bypass switch configured to form a bypass path through which the drive current bypasses the light emitting element, and a controller configured to control the voltage converter and the bypass switch. The light source unit includes a plurality of light emitting elements connected in series. The bypass path includes at least one bypass switch which are connected in parallel with at least one of the light emitting elements. When turning on the light emitting element of the light source unit, the controller controls the voltage conversion to start in a state where the bypass switch is turned on, and then, turns off the bypass switch to turn on the light emitting element.
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公开(公告)号：US20190008010A1
公开(公告)日：2019-01-03
申请号：US15748997
申请日：2016-07-01
摘要： A lighting circuit includes a voltage converter configured to receive a DC voltage to perform voltage conversion and supply a drive current to a light source unit including a light emitting element, a bypass switch configured to form a bypass path through which the drive current bypasses the light emitting element, and a controller configured to control the voltage converter and the bypass switch. The light source unit includes a plurality of light emitting elements connected in series. The bypass path includes at least one bypass switch which are connected in parallel with at least one of the light emitting elements. When turning on the light emitting element of the light source unit, the controller controls the voltage conversion to start in a state where the bypass switch is turned on, and then, turns off the bypass switch to turn on the light emitting element.
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