Vehicle lamp and vehicle lamp system
AssigneesKoito Manufacturing Co., Ltd., Toyota Jidosha Kabushiki Kaisha
InventorsAtsushi Uesugi, Hideki Uchida, Kiyotaka Mochizuki, Tatsuya Takagaki, Takuya Murakami
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Abstract
A vehicle lamp system includes a lamp unit and a lamp control unit. The lamp unit includes a plurality of LEDs and forms a high-beam light-distribution pattern. The lamp control unit controls the on/off of each of the plurality of LEDs. The lamp control unit controls each LED in the following manner. Specifically, the luminance is gradually lowered in a first period when the luminance is lowered to a level at which the LED remains on at reduced luminance. The luminance is gradually lowered in a second period, which is shorter than the first period, when the luminance is lowered to a level at which the LED is off.
Claims5
A vehicle lamp system, comprising:
- a lamp unit that is configured to combine light beams from a plurality of light-emitting elements to form a high-beam light-distribution pattern;
- and
- a control unit that controls on/off of each of the plurality of light-emitting elements,
- wherein, when luminance of each light-emitting element is to be lowered to a level at which the light-emitting element is off, the control unit controls the light-emitting element such that the luminance thereof is gradually lowered to the level at which the light-emitting element is off in a first period, and, when luminance of each light-emitting element is to be lowered to a level lower than a present level, the control unit controls the light-emitting element such that the luminance thereof is gradually lowered to the level lower than the present level in a second period longer than the first period.
A vehicle lamp, comprising:
- a lamp unit that is configured to combine light beams from a plurality of light-emitting elements to form a high-beam light-distribution pattern;
- and
- a driving circuit that turns on/off the plurality of light-emitting elements in response to a control signal that controls on/off of each of the plurality of light-emitting elements,
- wherein. when luminance of each light-emitting element is to be lowered to a level at which the light-emitting element is off, the driving circuit controls the light-emitting element such that the luminance thereof is gradually lowered to the level at which the light-emitting element is off in a first period based on the control signal, and, when luminance of each light-emitting element is to be lowered to a level lower than a present level, the driving circuit controls the light-emitting element such that the luminance thereof is gradually lowered to the level lower than the present level in a second period longer than the first period.
Dependencies are inferred from the claim text.