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Vehicle lamp

A lamp and vehicle technology, applied in the direction of headlights, vehicle parts, lighting and heating equipment, etc., can solve the problems of discontinuity, glare of drivers or pedestrians, etc., and achieve the effect of improving accuracy and reducing the impact of noise

Pending Publication Date: 2022-01-21
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with the low beam, the driver's visibility of the high beam is excellent, but there is a problem of causing glare to the driver of the vehicle or the pedestrian existing in front of the vehicle.
Shutter method or rotary method can continuously change the width of the light-off area (shading area), but the number of light-off areas is limited to one
The LED array method can set multiple light-off areas, but the width of the light-off area is limited by the illumination width of the LED chip, so it is non-continuous

Method used

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  • Vehicle lamp
  • Vehicle lamp
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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0057] Next, the configuration of the lighting circuit 200 of the vehicle lamp 2 according to Embodiment 1 will be described. figure 2 It is a block diagram of the lamp system 1 including the vehicle lamp 2 according to the first embodiment. The lamp system 1 includes a vehicle-side ECU 4 and a vehicle lamp 2 .

[0058] The ECU 4 on the vehicle side controls the state of the vehicle lamp 2 . Specifically, the ECU 4 on the vehicle side supplies the lighting circuit 200 with an instruction signal S3 including instructions to turn on and off the high beam and low beam, the high beam light distribution controlled by ADB, the overtaking lighting, and the like.

[0059] Regarding the light distribution control, camera information S1 and vehicle information S2 are supplied to the vehicle ECU 4, and the vehicle ECU 4 detects the situation in front of the vehicle based on the camera information S1, specifically, the presence or absence of oncoming vehicles, vehicles ahead, and pedest...

Embodiment approach 2

[0107] Figure 9 It is a block diagram of a lamp system 1 including a vehicle lamp 2 according to the second embodiment. The lamp system 1 includes a vehicle-side ECU 4 and a vehicle lamp 2 .

[0108] Descriptions common to Embodiment 1 are omitted, and differences or changes are mainly explained.

[0109] The lamp ECU 206 includes a motor control unit 250 that supplies an indicated power supply voltage V to the motor power supply circuit 230 REG The generation and stop of the power supply control signal S5. The rotation and stop of the motor 120 are controlled according to the power control signal S5. In this embodiment, after the ignition of the vehicle is turned on, the power supply control signal S5 becomes active (for example, high) in response to the first lighting instruction of the semiconductor light source 110 , and the rotation of the motor 120 starts.

[0110] When an event that triggers the motor 120 to start rotating occurs, the lighting circuit 200 makes the...

Embodiment approach 3

[0129] The outline of Embodiment 3 will be described. The lighting circuit of Embodiment 3 controls the scanning light source. The scanning light source includes a semiconductor light source and a motor. According to the movement of the motor, the outgoing light of the semiconductor light source scans in front of the lamp. The lighting circuit includes: a constant current driver for supplying a driving current corresponding to the light source control signal to the semiconductor light source; a light source control signal generator for generating the light source control signal in such a manner as to obtain a light distribution pattern corresponding to the light distribution instruction data; and a delay The time measuring device measures the delay time from the start of the change of the control signal of the light source to the change of the on / off state of the semiconductor light source.

[0130] By measuring the actual delay time, it is possible to control the on / off of t...

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PUM

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Abstract

A scanning light source 100 includes a semiconductor light source 110 and a motor 120, and scans, in front of a lamp, light emitted by the semiconductor light source 110 in accordance with movement of the motor 120. A constant-current driver 220 supplies, to the semiconductor light source 110, a drive current ILED that corresponds to a light source control signal S6. A light source control signal generator 210 generates the light source control signal S6 so that a light distribution pattern that corresponds to light distribution command data is obtained. A delay time measurement device 260 measures a delay time t necessary for the on / off state of the semiconductor light source 110 to change from when the light source control signal S6 changes.

Description

technical field [0001] The present invention relates to a vehicle lamp used in automobiles and the like. Background technique [0002] Luminaires for vehicles are usually capable of switching low and high beams. The low beam illuminates the vicinity of the vehicle with a specified illuminance, and determines the light distribution regulations in a way that does not cause glare to the oncoming vehicle or the vehicle in front. It is mainly used in the case of urban driving. On the other hand, the high beam illuminates a wide area ahead and a distant place with relatively high illuminance, and is mainly used when driving at high speed on a road with oncoming vehicles or fewer vehicles ahead. Therefore, compared with the low beam, the driver's visibility of the high beam is excellent, but there is a problem of causing glare to the driver of the vehicle or pedestrians existing in front of the vehicle. [0003] In recent years, an ADB (Adaptive Driving Beam: Adaptive Driving Bea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q1/04B60Q1/14
CPCB60Q1/04B60Q1/14B60Q1/0094F21S41/147F21S41/255F21S41/321F21S41/336F21S41/675Y02B20/40H05B45/30H05B47/16B60Q1/143F21S41/14B60Q1/076H03K17/78
Inventor 村上健太郎上杉笃志土屋俊幸
Owner KOITO MFG CO LTD