• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vehicle lamp has a first light source which emits light of a first brightness, a second light source which emits light of a second brightness greater than the first brightness, an actuating device (8, 9) which modifies the direction of the light emitted by the first light source and the second light source, and an ADB control device (21) which controls the light intensity of the second light source and the device actuating means (8, 9) so as to associate them mutually according to the driving conditions of the vehicle.
    公开号:FR3031164A1
    申请号:FR1563120
    申请日:2015-12-22
    公开日:2016-07-01
    发明作者:Hidetada Tanaka；Yuichi Shibata；Misako Nakazawa；Michihiko Hayakawa
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD [0001] The present invention relates to a vehicle lamp in which the light distribution pattern can be modified according to the driving conditions of the vehicle. In a headlight for a vehicle of the state of the art, there is known a system ADB (adaptive driving beam, English "Adaptive Driving Beam") to control a pattern of distribution of traffic light light depending on the position of the previous vehicle. Patent document 1, for example, describes a headlight where a pivot control for laterally changing the direction of radiation of a main beam according to the direction of movement of its own vehicle is performed, in addition to the control of ADB. the light distribution pattern. In addition, the patent document 2 proposed a vehicle lamp in which a leveling control for vertically changing the direction of radiation of a high beam is performed, in addition to the pivot control. [0003] Patent Document 1: Japanese Patent Open Publication No. 2012-162121.
    [0002] Patent Document 2: Japanese Patent Open Publication No. 2013-256292. On the other hand, to change the light distribution pattern or the radiation direction depending on the driving conditions, a fast response is required of a moving part. Accordingly, in the state of the art, attempts have been made to decrease the mass of the entire moving part by using a semiconductor light source such as an LED or an LD. In particular, since the DL can radiate spot light at a remote location, the DL has the advantage of forming various light distribution patterns by being combined with the LED having a relatively low brightness. However, in the case where the radiation direction of a laser beam is changed by the ADB control of the state of the art, there is a problem that direct light provides glare to the driver of an oncoming vehicle or the reflected light 5 decreases the driver's visibility of his own vehicle. SUMMARY [0005] Examples of embodiments of the invention provide a vehicle lamp capable of forming various light distribution patterns using in combination a high brightness light source and a low light light source. A vehicle lamp according to an exemplary embodiment 15 comprises a first light source which emits light of a first brightness (low light source of light which emits light of a relatively low brightness) ; a second light source which emits light of a second brightness greater than the first brightness (high brightness light source which emits light of relatively high brightness); an actuator which modifies the direction of the light emitted by the first light source and the second light source; and an ADB control device which controls the light output (amount of light emitted, light intensity) of the second light source and the actuator so as to associate them with each other depending on the driving conditions of the vehicle. As a low-light light source and a high-brightness light source, a semiconductor light source can be used here. For example, an LED can be used as a low-light light source and an LD 35 can be used as a high brightness light source. Alternatively, a low light type LED and a high brightness type DL may be used in combination. As an actuator, a pivotal actuator may be used to control both the low-light light source and the high-brightness light source in the horizontal direction or a leveling actuator. for separately controlling the two light sources in the vertical position or the like. In addition, the ADB controller may be adapted to control in association the actuator and the light intensity of the high brightness light source as follows. [0008] (A) The ADB control device performs a control of decreasing the light intensity of the second light source relative to the current light intensity when the light emitted by the second light source is directed to a vehicle coming in the opposite direction. (B) The ADB controller performs a control of decreasing the light intensity of the second light source relative to the current light intensity when the light emitted by the second light source is directed to a retro object -reflective. (C) The ADB controller performs a control of increasing the light intensity of the second light source when the light emitted by the second light source is directed towards the direction of extension of a turn . (D) The ADB controller effects control of changing the light intensity of the second light source from low to high when the light emitted by the second light source is switched from the down direction to the light source. the direction to the top. (E) In heavy weather, the ADB control device controls the direction of the optical axis of the second light source 30 towards the road surface and decreases or stops the light intensity of the light source. the first source of light. According to the vehicle lamp of the present invention, when the ADB control is performed, the light intensity of the high brightness light source 35 is controlled in association with the radiation direction. It is therefore possible to obtain an excellent effect enabling various patterns of light distribution to be formed without giving glare to the driver of the other vehicle or of his own vehicle.
    [0003] BRIEF DESCRIPTION OF THE DRAWINGS The invention will be well understood and its advantages will be better understood on reading the detailed description which follows. The description refers to the following drawings, which are given by way of example. Figure 1 is a front view of a vehicle headlight showing an exemplary embodiment of the present invention. Figure 2 is a vertical sectional view of the headlight shown in Figure 1.
    [0004] Fig. 3 is a block diagram showing an electric control system of the lighthouse. Figures 4A and 4B are schematic models showing a light distribution pattern of the headlight. Figs. 5A to 5C are explanatory views of operation showing a first example of ADB control. Figs. 6A and 6B are explanatory views of operation showing a second example of the ADB control. Figs. 7A and 7B are explanatory operating views showing a third example of the ADB control.
    [0005] Figs. 8A and 8B are explanatory operating views showing a fourth example of ADB control. Figs. 9A-9C are explanatory operating views showing a fifth example of the ADB control.
    [0006] DETAILED DESCRIPTION [0011] An embodiment for realizing the present invention in the form of a lighthouse will be described hereinafter with reference to the drawings. A vehicle headlight 1 shown in FIGS. 1 and 2 is configured such that a lamp chamber 4 is formed between a lamp housing 2 and a front hood 3 and a passing light unit 5 and a fire unit. 303 1 1 6 4 5 route 6 are mounted in the lamp chamber 4. In the main beam unit 6, a light source base 7, a pivoting actuator 8 for pivoting the base of the light source 7 in the horizontal direction and a leveling actuator 9 for tilting the base of the light source 7 in the vertical direction are provided. On the basis of the light source 7, a low-light light source 11 for emitting light of relatively low brightness, a first reflector 12 for reflecting the light emitted by the light source of low 11 to the front of the vehicle, a high brightness light source 13 for emitting light of a relatively high brightness and a second reflector 14 for reflecting the light emitted by the high brightness light source 13 to the light source. 'front of the vehicle are provided. Further, in the present embodiment, an LED is used as a low-light light source 11, a DL is used as a high-brightness light source 13, and a parabolic-type reflecting mirror is used as the low-light light source 11. first and second reflectors 12, 14. [0013] As shown in FIG. 3, the electric control system 20 of the headlamp 1 comprises an ADB control device 21 for controlling the pattern of light distribution of a light. according to the driving conditions of the vehicle. The ADB control device 21 includes a driving information input unit 22 for inputting the driving information from various sensors, a driving condition determining unit 23 for determining the driving conditions common to each other. based on the inputted information, a light distribution control unit 24 for controlling the pivoting actuator 8 and the leveling actuator 9, a light source control unit 25 for controlling the light intensity a low beam light source 10, low light light source 11 and high brightness light source 13 and a CPU 26 for controlling the light distribution control unit 24 and the light source control unit 25 so as to be mutually associated based on the results of determining the driving conditions. On the other hand, the information input by the driving information input unit 22 comprises information detected by a camera 31, an illumination sensor 32, a road navigation system. 33, a steering angle sensor 34, a beam switching switch 35 and a vehicle speed sensor 36 or the like. Further, based on this driving information, the driving condition determining unit 23 is adapted to determine driving conditions such as the position of a preceding vehicle, including an oncoming vehicle, the position of a retroreflective object such as road signs or billboards, the shape of the road, the direction of movement of its own vehicle, the position of the beam and the speed of its own vehicle. A variable light distribution control by means of the ADB control device 21 is then described. As shown in FIG. 4A, the headlamp 1 of the present embodiment forms a passing light pattern P1 by means of the light emitted by the dipped beam light source 10, forms a traffic light pattern P2 at by means of the light emitted by the low-light light source 11 and forms a spot-light pattern P3 by means of light 25 emitted by the high-brightness light source 13. As shown in FIG. 4B, the pattern P3 is formed in combination with the high beam pattern P2 and strongly illuminates the front of its own vehicle up to 200 m at 500 m. [0016] FIGS. 5A to 5C show a first example of variable light distribution control (ADB control 1). When the beam switching switch 35 is switched from low to high, the ADB controller 21 performs a light distribution control to change the direction of the light emitted by the low-light light source 11 and by the high brightness light source 13 according to the driving conditions (S11). In this way, as shown for example in FIG. 5B, the outer region of the road is illuminated by the traffic light pattern P2 of the left and right headlights 1 and a road shoulder can be illuminated brighter by the spot fire pattern P3. When in this state, an oncoming vehicle V1 approaches its own vehicle (not shown), the ADB control device 21 determines the relative position of its own vehicle and the oncoming vehicle. Inverting V1 based on the image information of the camera 31. When the oncoming vehicle V1 approaches to a position where the light of its own vehicle reaches the vehicle coming from in the opposite direction V1 (S12), as shown in FIG. 5C, the ADB control device 21 performs a control for decreasing or stopping the light intensity of the high-brightness light source 13 in the lighthouse on one side which illuminates the path on the side of the oncoming vehicle V1 (S13). According to the control of the first example, the bright spot P3 high-beam pattern directed towards the oncoming vehicle V1 is instantly attenuated or extinguished. As a result, the glare communicated to the oncoming vehicle driver V1 can be prevented in advance without generating the response delay as in the prior art ADB control. [0018] FIGS. 6A and 6B show a second example of variable light distribution control (ADB control 2). Here, during the light distribution control of the low-light light source 11 and the high-brightness light source 13 (S21), the ADB control device 21 performs a dimming control. of the high brightness light source 13 in the lighthouse 1 which illuminates the side of the lane of its own vehicle (S23) when the presence of a predetermined number of retro-reflective objects RR, such as beacons or Traffic signs are determined in front of its own vehicle (not shown) based on the sensing information of the illumination sensor 32 (S22). According to the control of the second example, the glare communicated to the driver of his own vehicle by the light reflected by the retro-reflective objects RR does not occur and the traffic signs can also be easily confirmed. On the other hand, in a road such as a highway where a large number of traffic signs are present, the ADB command can be started at the same time as the entry on the road. The dimming control of the high brightness light source 13 in the lighthouse 1 on the track side of its own vehicle can be performed when light reflected from a mountainous surface or the surface of a wall W the side of the road is detected, 10 in addition to the road signs. Figures 7A and 7B show a third example of the variable light distribution control (ADB control 3). Here, during the light distribution control of the low light light source 11 and the high brightness light source 13 (S31), the ADB controller 21 determines that its own vehicle V advances on a turn based on the input direction information from the steering angle sensor 34 or the inputted route information from the road navigation system 33. In addition, the ADB controller 21 performs a relative increase control of the light intensity of the high brightness light source 13 in the headlamp 1 which illuminates the side of the extension direction (right side in FIG. 7B) of the turn and performs a decrease command relative to the light intensity of the high brightness light source 13 in the headlight 1 which illuminates the opposite side to the direction of extension of the turn (S33). According to the command of the third example, during the course of the turn, the brightness is changed in association with the direction of the spot fire pattern P3. Accordingly, there is an advantage of greatly illuminating the remote location in the direction of travel that a driver is likely to observe carefully. Figures 8A and 8B show a fourth example of the light distribution variable control (ADB control 4). Here, when the high brightness light source 13 is automatically turned on according to the driving conditions (S41), the ADB control device 21 first controls the leveling actuator. 9 to change the radiation direction of the P3 spot light pattern from an initial downward position to a normal upward position (S42) and then gradually changes the light intensity of the high brightness light source. 13 from low to high as a function of the inclination of the P3 (S43) point-beam pattern, and then performs a light distribution control of the low-light light source 11 and the high-brightness light source 13 depending on driving conditions (S44). According to the control of the fourth example, the darkness is changed in association with the direction of the one-off traffic light pattern P3. As a result, a driver who is not aware of the automatic illumination of the high brightness light source 13 can take advantage of the functionality and specific mobility for the ADB control. Figures 9 to 9C show a fifth example of the variable light distribution control (ADB control 5). Here, during the light distribution control of the low-light light source 11 and the high-brightness light source 13 (S51), the ADB controller 21 determines the time, based on the image data of the camera 31 or the functional signal of a windscreen wiper or fog lamp, and directs the optical axis of the high-brightness light source 13 towards the surface of the road (S53) when a heavy weather such as rain or fog is determined (S52). In this way, as shown in FIG. 9B, the ADB control device 21 suppresses the upward extension of the one-off traffic light pattern P3 and stops the light intensity of the low-light light source 11 ( S54). In addition, the ADB control device 21 suppresses the appearance of a light curtain by the traffic light pattern P2. In this state, as shown in FIG. 9C, the ADB control device 21 continues to perform the variable light distribution control only by the high brightness light source 13 of the left and right headlights 1. According to the control of fifth example, the light intensity of the low-light light source 11 is stopped in association with the direction of the P3 spot-fire pattern in heavy weather. As a result, there is an advantage to suppress the appearance of the light curtain in front of the vehicle and thereby improve the visibility of its own vehicle. [0022] On the other hand, the present invention is not limited to the embodiment and the above examples. For example, the light intensity of the high-brightness light source can be controlled according to various driving conditions of the vehicle, by determining the low-speed driving or the high-speed driving of the vehicle on the basis of the speed information from of a vehicle speed sensor and changing the brightness of the one-time high beam pattern according to the result of the determination. In addition, the configuration of each part can be suitably modified without departing from the essence of the invention.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A vehicle lamp comprising: a first light source (11) configured to emit light of a first brightness; a second light source (13) configured to emit light of a second brightness greater than the first brightness; an actuator (8, 9) configured to change the direction of light emitted by the first light source and the second light source; and an ADB controller (21) configured to control the light intensity of the second light source (13) and the actuator (8, 9) so as to associate them with each other depending on the driving conditions of the vehicle.
    [0002]
    The vehicle lamp according to claim 1, wherein the ADB controller (21) is configured to perform a dimming control of the second light source when the light emitted by the second source of light. light is directed to a vehicle (V1) coming in the opposite direction.
    [0003]
    The vehicle lamp according to claim 1 or 2, wherein the ADB controller (21) is configured to perform a dimming control of the second light source when the light emitted by the second Light source is directed at a retro-reflective object (RR).
    [0004]
    A vehicle lamp as claimed in any one of claims 1 to 3, wherein the ADB controller (21) is configured to effect a control of increasing the light intensity of the second light source when the light emitted by the second light source is directed towards the direction of extension of a turn.
    [0005]
    A vehicle lamp as claimed in any one of claims 1 to 4, wherein the ADB controller (21) is configured to effect control of changing the light intensity of the second light source from low to medium. strong when the light emitted by the second light source is switched from the direction downwards to the direction upwards.
    [0006]
    A vehicle lamp as claimed in any one of claims 1 to 5, wherein the ADB controller (21) is configured to perform, in heavy weather, directional control of the optical axis of the vehicle. second source of light towards the road surface and decreasing the luminous intensity of the first light source.
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    法律状态:
    2016-11-14| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-08-31| PLSC| Publication of the preliminary search report|Effective date: 20180831 |
    2018-10-29| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-11-12| PLFP| Fee payment|Year of fee payment: 6 |
    2021-11-15| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
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    JP2014262977A|JP6599613B2|2014-12-25|2014-12-25|Light distribution variable vehicle lamp|
    JP2014262977|2014-12-25|
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