• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    The control portion controls a change timing of the light emission intensity of the first light source (28a) and a delay of change of the light emission intensity of the second light source (28b) so that a first light-masking portion is formed in a portion of the first irradiation pattern, a second light-masking portion is formed in a portion of the second irradiation pattern so as to overlap the first light-masking portion, and a range of the first light-masking portion and a range of the second light-masking portion are shifted relative to one another.
    公开号:FR3057938A1
    申请号:FR1760010
    申请日:2017-10-24
    公开日:2018-04-27
    发明作者:Hidetada Tanaka；Kentarou Murakami
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    © Publication no .: 3,057,938 (to be used only for reproduction orders)
    ©) National registration number: 17 60010 ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY
    COURBEVOIE © IntCI 8 : F 21 S 41/663 (2017.01), F 21 S 41/67
    A1 PATENT APPLICATION
    ©) Date of filing: 24.10.17. © Applicant (s): KOITO MANUFACTURING CO., LTD. © Priority: 24.10.16 JP 2016208063. - JP. @ Inventor (s): TANAKA HIDETADA and MURAKAMI KENTAROU. (43) Date of public availability of the request: 04.27.18 Bulletin 18/17. ©) List of documents cited in the report preliminary research: The latter was not established on the date of publication of the request. (© References to other national documents ® Holder (s): KOITO MANUFACTURING CO., LTD .. related: ©) Extension request (s): © Agent (s): CABINET BEAU DE LOMENIE.
    Q4J OPTICAL UNIT.
    FR 3 057 938 - A1 _ The control part controls a time delay for changing the light emission intensity of the first light source (28a) and a time delay for changing the light emission intensity of the second light source (28b) such that a first light masking part is formed in a part of the first irradiation configuration, a second light masking part is formed in a part of the second configuration irradiating so as to overlap the first light masking portion, and a range of the first light masking portion and a range of the second light masking portion are offset from each other other.
    130
    120
    The present invention relates to an optical unit, and more particularly to an optical unit used for a vehicle light.
    Recently, an optical unit comprising a rotary reflector which rotates in a direction around its axis of rotation while reflecting light emitted from a light source has been designed (see document JPWO 2011129105 (A1) ).
    This optical unit can form a partially masked light distribution configuration by controlling the timing of the switching on / off of the light source while scanning the front side of the optical unit with a light source image.
    Furthermore, when the change in brightness in the vicinity of a light / dark limit of a part for masking the light formed in part of a light distribution configuration is abrupt, a feeling of discomfort can be given to an observer of the light distribution pattern. On the other hand, when the change in brightness in the vicinity of the light / dark limit is too gentle, the range of the light-masking portion becomes inconspicuous, and therefore, there is a concern that visibility d an end portion of an irradiation area adjacent to the light masking portion is deteriorated.
    The present invention has been made in view of such situations, and an object of the latter is to provide a new optical unit capable of correcting the change in brightness in the vicinity of the light / dark limit of a masking portion. light.
    light of the first change-over delay In order to solve the above problem, an optical unit according to an aspect of the present invention comprises a first light source configured to emit a first irradiation beam, a second light source configured to emit a second irradiation beam, a scanning portion which is configured to form a first irradiation pattern by scanning the first irradiation beam, to form a second irradiation pattern by scanning the second irradiation beam , and to form a light distribution pattern by superimposing the first irradiation pattern and the second irradiation pattern, and a control portion configured to control a light emission intensity of the first light source and an intensity light emission from the second light source. The control part is configured to control a timing for changing the light source emission intensity and one of the light emission intensity of the second light source so that a first masking part light is formed in a portion of the first irradiation pattern, a second light masking portion is formed in a portion of the second irradiation pattern so as to overlap the first light masking portion, and a range of the first light masking portion and a range of the second light masking portion are offset from each other. According to this aspect, since the areas adjacent to the two ends of the light masking part are scanned only by the first irradiation beam or the second irradiation beam, the change in brightness in the vicinity of the light limit / dark of the light masking portion can be achieved in stages. Here, the change in brightness is, for example, a function of a change in brightness relative to a change in position of the scanning direction of the light distribution pattern.
    The control part can be configured to be able to execute a first light masking mode in which an offset of the range of the first light masking part and of the range of the second masking part of light is relatively large, and a second light masking mode in which an offset of the range of the first light masking portion and the range of the second light masking portion is relatively small. In this way, the change in brightness in the vicinity of the light / dark limit of the light masking portion can be made relatively small in the first light masking mode and can be made relatively large in the second masking mode. light.
    The control part can be configured to be able to execute the first light masking mode or the second light masking mode depending on a state of movement of a particular vehicle
    or a condition in front of the particular vehicle. Of this way, the change of brightness at neighborhood of the limit bright / dark from the part of masking of the light can be returned different in function of the
    situation in which the optical drive is used.
    The scanning portion may have a 'rotary reflector which is configured to rotate in a direction around its axis of rotation while reflecting light emitted from the first light source and the second light source.
    Another aspect of the present invention is also an optical unit. This optical unit is an optical unit configured to form a light distribution pattern by scanning the light respectively emitted from a plurality of light sources. The optical unit is configured to form a light masking portion in a portion of the light distribution configuration by controlling the timing of the light sources on / off. The optical unit is configured to form a light distribution configuration such that it becomes progressively brighter as it moves away from the light masking portion.
    According to this aspect, since the light is scanned to the areas adjacent to the two ends of the light masking part so that it becomes progressively brighter away from the light masking part , the change in brightness in the vicinity of the light / dark limit of the light masking portion can be achieved in stages.
    Furthermore, any combination of the components described above and the transformation of the expression of the present invention among methods, devices and systems or equivalent are also relevant as aspects of the present invention. In addition, any suitable combination of the parts described above can also be included within the scope of the invention to be sought by the present patent application.
    According to the present invention, it is possible to correct a change in brightness in the vicinity of the light / dark limit of the light masking portion.
    Figure 1 is a horizontal sectional view of a vehicle headlight according to an example of reference.
    Figure 2 is a top view schematically showing a configuration of a light unit comprising an optical unit according to the reference example.
    Figure 3 is a side view of the light unit, as seen from direction "A" shown in Figure 1.
    FIGS. 4A to 4E are perspective views showing the states of a blade as a function of an angle of rotation of a rotary reflector in the light unit according to the reference example, and FIGS. 4F to 4 J are views intended to explain that the direction of reflection of light from a light source changes as a function of the states shown in Figures 4A to 4E.
    Figures 5A to 5E are views showing projection images in scanning positions where the rotary reflector corresponds to the states shown in Figures 4F to 4J.
    Figure 6A is a view showing a light distribution configuration when a range of ± 5 degrees in a right and left direction relative to an optical axis is scanned using the vehicle headlight according to the reference example, Figure 6B is a view showing the light intensity distribution of the light distribution configuration shown in Figure 6A, Figure 6C is a view showing a state in which part of the light distribution configuration is masked using the headlight vehicle according to the reference example, Figure 6D is a view showing the light intensity distribution of the light distribution configuration shown in Figure 6C, Figure 6E is a view showing a state in which a plurality of parts of the light distribution configuration is masked using the vehicle headlight according to the reference example, and FIG. 6F is a view my trating the light intensity distribution of the light distribution configuration shown in Figure 6E.
    Figure 7 is a side view schematically showing a light unit according to a first embodiment.
    Figure 8 is a top view schematically showing the fire unit according to the first embodiment.
    FIG. 9 is a view showing a projected image when a rotary reflector is in the state shown in FIG. 7.
    FIG. 10A is a view showing an irradiation configuration formed by a front light-emitting diode, FIG. 10B is a view showing an irradiation configuration formed by a rear light-emitting diode, and FIG. 10C is a view showing a distribution configuration of combined light formed by two light emitting diodes.
    FIG. 11A is a view showing an irradiation configuration having a light masking portion formed by a front light emitting diode, FIG. 11B is a view showing an irradiation configuration having a light masking portion formed by a rear light emitting diode, and Figure 11C is a view showing a combined light distribution configuration having a light masking portion formed by two light emitting diodes.
    Figure 12 is a top view schematically showing a configuration comprising an optical unit according to a second embodiment.
    Figure 13A is a schematic view showing a PHI light distribution configuration formed when a light emitting diode unit is turned on in a state where the rotary reflector is stopped, and Figure 13B is a schematic view showing a PH2 light distribution configuration formed when a light emitting diode unit is turned on in a state where the rotary reflector is rotated.
    FIG. 14A is a view showing a state of irradiation by a light masking light distribution configuration in the case where a vehicle at the front is present in front of a vehicle while traveling on a straight road, and the Figure 14B is a schematic view for explaining the light masking light distribution configuration shown in Figure 14A.
    FIG. 15A is a view showing a state of irradiation by a light masking light distribution configuration in the case where a vehicle at the front is present in front of a vehicle while moving on a curved road, and Figure 15B is a schematic view for explaining the light masking light distribution configuration shown in Figure 15A.
    Figure 16A is a schematic view of an optical unit according to a third embodiment as seen from the side, Figure 16B is a schematic view of an engine shown in Figure 16A as seen from above, and Figure 16C is a schematic view of the optical unit according to the third embodiment as seen from above.
    Figure 17A is a side view of an engine according to a modification, Figure 17B is a bottom view of the engine shown in Figure 17A, and Figure 17C is a schematic view for explaining the assembly of the engine and d '' a rotary reflector according to the modification.
    The present invention will be described below with reference to the drawings, based on the reference examples and embodiments. The same components, bodies, processes or the like shown in each drawing are designated by the same references, and repeated explanations are omitted when appropriate. In addition, the embodiments are not intended to limit the invention but are examples. All of the features described in the embodiments and combinations thereof are not necessarily essential for the invention.
    An optical unit of the present invention can be used for different vehicle lights. A case where the optical unit of the present invention is applied to a vehicle headlight of a vehicle light will be described below.
    (Reference example)
    A basic configuration and basic operation of an optical unit according to the present embodiment will first be described with reference to a reference example. Figure 1 is a horizontal sectional view of a vehicle headlight according to the reference example. A vehicle headlight 10 shown in Figure 1 is a right headlight mounted on the right side of a front end portion of an automobile and has the same structure as a left headlight mounted on the left side except that is bilaterally symmetrical with the left headlight. Therefore, the right vehicle headlight 10 will be described in detail below, and the description of the left vehicle headlight will be omitted.
    As shown in Figure 1, the vehicle headlight 10 includes a light body 12 having a recess which opens forward. The front opening of the fire body 12 is covered by a transparent front cover 14, thereby forming a fire chamber 16. The fire chamber 16 functions as a space in which two fire units 18, 20 are received in a state side by side arrangement in a vehicle width direction.
    Among the fire units, the fire unit arranged on the exterior side, that is to say the fire unit 20 disposed on the upper side in FIG. 1 in the right vehicle headlight 10, is a unit of fire comprising a lens. The light unit 20 is configured to irradiate a variable high beam. On the other hand, among the fire units, the fire unit arranged on the inner side, i.e. the fire unit 18 arranged on the lower side in Figure 1 in the right vehicle headlight 10, is configured to irradiate a beam of low beam.
    The dipped beam unit 18 comprises a reflector 22, a light source bulb (incandescent bulb) 24 supported on the reflector 22, and a mask (not shown). The reflector 22 is tiltably supported relative to the lamp body 12 by known means (not shown), for example means using a pointing screw and a nut.
    As shown in FIG. 1, the light unit 20 comprises a rotary reflector 26, a light-emitting diode 28, and a convex lens 30 as a projection lens disposed in front of the rotary reflector 26. Furthermore, instead of the light emitting diode 28, a semiconductor light emitting element such as a light emitting element or a laser diode element can be used as the light source. More particularly for the control of masking a part of a light distribution configuration (to be described later), it is desirable to use a light source capable of performing the on / off in a precise time short. Although the shape of the convex lens 30 can be appropriately chosen depending on the light distribution characteristics such as light distribution configurations or required illumination configurations, an aspherical lens or a surface lens with a free curve is used. In the reference example, an aspherical lens is used as the convex lens 30.
    The rotary reflector 26 rotates in a direction around its axis of rotation R thanks to a drive source such as a motor (not shown). In addition, the rotary reflector 26 has a reflecting surface configured to reflect light emitted from the light emitting diode 28 while rotating and to form a desired light distribution configuration.
    Figure 2 is a top view schematically showing a configuration of the light unit 20 comprising the optical unit according to the reference example. The
    figure 3 is a view next to of the unit of fire 20, such that view since the direction " A »shown in the figure 1. [0025] The reflector rotary 26 is configured of such
    so that three blades 26a serving as a reflecting surface and having the same shape are provided around a cylindrical rotary part 26b. The axis of rotation R of the rotary reflector 26 is oblique to an optical axis Ax and is provided in a plane comprising the optical axis Ax and the light-emitting diode 28. In other words, the axis of rotation R is provided substantially parallel to a light scanning plane (irradiation beam) of the light emitting diode 28 which scans in a right and left direction by rotation. In this way, the thickness of the optical unit can be reduced. Here, the scanning plane can be considered as a sector-shaped plane which is formed by continuously connecting the geometrical location of the light of the light emitting diode 28 which is the scanning light, for example. In addition, in the light unit 20 according to the reference example, the light-emitting diode 28 provided is relatively small, and the position where the light-emitting diode 28 is arranged is between the rotary reflector 26 and the convex lens 30 and is offset from the optical axis Ax. Therefore, the dimension in a depth direction (a front-rear vehicle direction) of the vehicle headlight 10 can be shortened, compared to the case where a light source, a reflector, and a lens are arranged in line on an axis. optical as in a conventional headlamp type fire unit.
    In addition, the shapes of the blades 26a of the rotary reflector 26 are configured so that a secondary light source from the light emitting diode 28 due to a reflection is formed near a focal point of the convex lens 30. In addition, each of the blades 26a has a twisted shape such that an angle formed by the optical axis Ax and the reflecting surface changes along a circumferential direction around the axis of rotation R. In this way, as shown in Figure 2, scanning using the light from light emitting diode 28 becomes possible. This will be described in more detail.
    Figures 4A to 4E are perspective views showing the states of the blades as a function of an angle of rotation of the rotary reflector 26 in the light unit according to the reference example, and Figures 4F to 4 J are views intended to explain that the direction of reflection of the light coming from a light source changes according to the states represented in FIGS. 4A to 4E. Figure 4A shows a state in which the light-emitting diode 28 is arranged so as to irradiate a boundary region between two plates 26al, 26a2. In this state, as shown in FIG. 4F, the light from the light-emitting diode 28 is reflected by a reflecting surface S of the strip 26al in an oblique direction relative to the optical axis Ax. As a result, an end region of the two right and left end regions among the regions in front of the vehicle where the light distribution pattern is formed is irradiated. Consequently, when the rotary reflector 26 rotates to the state shown in FIG. 4B, the reflecting surface S (angle of reflection) of the blade 2 6al which reflects the light from the light-emitting diode 28 changes because the blade 26al is twisted. As a result, as shown in Figure 4G, the light from the light emitting diode 28 is reflected in a direction closer to the optical axis Ax than the direction of reflection shown in Figure 4F.
    Then, when the rotary reflector 26 is rotated as shown in Figures 4C, 4D and 4E, the direction of reflection of the light from the light emitting diode 28 changes to the other end part of the two right and left end parts base of simulated results taking into account the image flicker configuration among the areas in front of the vehicle where the light distribution configuration is formed. The rotary reflector 26 according to the reference example is configured so that it can scan the front side once in one direction (horizontal direction) with the light from the light emitting diode 28 by being rotated 120 degrees. In other words, when a blade 26a passes in front of the light-emitting diode 28, a desired area in front of the vehicle is scanned once by the light of the light-emitting diode 28. Furthermore, as shown in FIGS. 4F to 4J , a secondary light source (virtual light source image) 32 moves to the right and left near the focal point of the convex lens 30. The number and shape of the blades 26a and the speed of rotation of the rotary reflector 26 are suitably provided for on the experiments or characteristics required light distribution or to be swept. A motor is further desirable as a drive unit which can change its rotational speed according to different light distribution controls. Thus, it is possible to easily change the scanning delay. As an engine, an engine capable of obtaining rotation timing information from the engine itself is desirable. More specifically, a brushless DC motor can be used. When the DC brushless motor is used, the rotation timing information can be obtained from the motor itself, and equipment such as an encoder can thus be omitted.
    In this way, the rotary reflector 26 according to the reference example can scan the front side of the vehicle in the right and left direction by using the light from the light emitting diode 27 by designing the shape and the speed of rotation of the blade 26a. Figures 5A to 5E are views showing projection images in scanning positions where the rotary reflector corresponds to the states shown in Figures 4F to 4J. The units on the vertical axis and the horizontal axis in these figures are degrees (°), which indicate the irradiation range and the irradiation position. As shown in Figures 5A to 5E, rotation of the rotary reflector 26 causes the projection image to move in the horizontal direction.
    Figure 6A is a view showing the light distribution configuration when a range of ± 5 degrees in the right and left direction relative to the optical axis is scanned using the vehicle headlight according to the reference example , Figure 6B is a view showing the light intensity distribution of the light distribution configuration shown in Figure 6A, Figure 6C is a view showing a state in which part of the light distribution configuration is masked in using the vehicle headlight according to the reference example, Figure 6D is a view showing the light intensity distribution of the light distribution configuration shown in Figure 6C, Figure 6E is a view showing a state in which a plurality of locations of the light distribution pattern is masked using the vehicle headlight according to the reference example, and Figure 6F is a view showing the light intensity distribution of the light distribution configuration shown in Figure 6E.
    As shown in Figure 6A, the vehicle headlight 10 according to the reference example reflects the light from the light emitting diode 28 through the rotary reflector 26 and scans the front side with the reflected light, thereby forming a high beam light distribution configuration which is laterally elongated substantially in the horizontal direction. In this way, since a desired light distribution configuration can be formed by rotation in one direction of the rotary reflector 26, driving by a special mechanism such as a resonance mirror is not necessary and size restrictions of the reflecting surface are weak like the resonance mirror. Therefore, by choosing the rotary reflector 26 having a larger reflecting surface, the light emitted from the light source can be effectively used for illumination. That is, the maximum light intensity in the light distribution configuration can be increased. Furthermore, the rotary reflector 26 according to the reference example has substantially the same diameter as the convex lens 30, and the surface of the blade 26a can be increased accordingly.
    In addition, the vehicle headlight 10 comprising the optical unit according to the reference example can form a high beam light distribution configuration in which an arbitrary zone is masked as shown in FIGS. 6C and 6E by synchronizing the timing of the switching on / off of the light-emitting diode 28 and the changes in the light-emitting light intensity with the rotation of the rotary reflector 26. In addition, when the fire light distribution configuration of route is formed by changing (switching on / off the light emitting diode) the light intensity of light emitting from light emitting diode 28 in synchronism with the rotation of the rotary reflector 26, it is also possible to carry out a pivoting control of the configuration light distribution itself by shifting the phase of changes in light intensity. As described above, in the vehicle headlight according to the reference example, the light distribution configuration is formed by scanning the light from the light emitting diode, and the light masking part can be arbitrarily formed on part of the light distribution pattern by controlling changes in the light intensity of light emission. Therefore, it is possible to precisely mask a desired area by a small number of light emitting diodes, compared to the case where the light masking portion is formed by extinguishing certain diodes of a plurality of light emitting diodes. In addition, since the vehicle headlight 10 can form a plurality of light masking portions, it is possible to mask the area corresponding to each vehicle even when a plurality of vehicles is present at the front.
    In addition, since the vehicle headlight 10 can perform the light masking control without displacing the basic light distribution configuration, it is possible to reduce the feeling of discomfort given to a driver during the masking command from light. Furthermore, since the light distribution configuration can be rotated without moving the light unit 20, the mechanism of the light unit 20 can be simplified. Therefore, the vehicle headlight 10 need only include a motor necessary for the rotation of the rotary reflector 26 as a driving part for a variable light distribution control, so that the simplified configuration, cost reduction and miniaturization can be obtained.
    (First embodiment)
    As in the optical unit according to the reference example described above, it is possible to form a high beam light distribution configuration with a single light source. However, a case where a brighter irradiation configuration is required or a case where a light emitting diode of low light intensity is used for cost reduction is also conceivable. Therefore, in the present embodiment, an optical unit having a plurality of light sources will be described.
    Figure 7 is a side view schematically showing a fire unit according to a first embodiment. Figure 8 is a top view schematically showing the fire unit according to the first embodiment. A light unit 120 according to the first embodiment includes a projection lens 130, a reflector 26 and two rotating light emitting diodes 28a, 28b. Figure 9 is a view showing a projected image when the rotary reflector 26 is in a state shown in Figure 7. A projected image la is formed by the light from the light emitting diode 28a disposed on the front side near the projection lens 130, and a projected image Ib is formed by the light from the light-emitting diode 28b disposed on the rear side away from the projection lens 130. [0038] FIG. 10A is a view showing an irradiation configuration formed by the front light emitting diode 28a, Figure 10B is a view showing an irradiation configuration formed by the rear light emitting diode 28b, and Figure 10C is a view showing a combined light distribution configuration formed by two light emitting diodes. As shown in Figure 10C, a desired light distribution configuration can also be formed using a plurality of light emitting diodes. In addition, in the combined light distribution configuration, the maximum light intensity which is difficult to obtain with only one light emitting diode can also be obtained.
    Next, a case where a light masking portion is formed in a light distribution configuration using the light unit 120 will be described. Figure 11A is a view showing an irradiation pattern having a light masking portion formed by the front light emitting diode 28a, Figure 11B is a view showing an irradiation pattern having a light masking portion formed by the rear light emitting diode 28b, and Figure 11C is a view showing a combined light distribution configuration having a light masking portion formed by two light emitting diodes. In order to form the light distribution patterns shown in Figures 11A and 11B, the timers for switching on / off of the respective light emitting diodes are suitably offset from each other so as to align the positions of the respective light masking portions. As shown in Figure 11C, a desired light distribution configuration having a light masking portion can also be formed using a plurality of light emitting diodes. In addition, in the combined light distribution configuration, the maximum light intensity which is difficult to obtain by only a light emitting diode can also be obtained, and a wider area can be irradiated.
    (Second embodiment)
    Figure 12 is a top view schematically showing a configuration comprising an optical unit according to a second embodiment.
    An optical unit 150 shown in Figure 12 includes a light emitting diode unit 152a as a first light source for the emission of a first irradiation beam, a light emitting diode unit 152b as a second light source for the emission of a second irradiation beam, a light-emitting diode unit 152c as a third light source for the emission of a third irradiation beam, the rotary reflector 26, a part control 154 for controlling the light emission intensity of the light emitting diode units 152a, 152b, 152c, and a detection part 156 for the detection of a driving state of a particular vehicle and of a condition in front of the vehicle
    particular. The reflector rotary 26 turned in a direction around of his rotation axis all in reflective the lights respective issued by the
    light-emitting diode units 152a to 152c. The detection part 156 is, for example, a car navigation system or equivalent comprising a camera, a radar, a vehicle speed sensor, a steering angle sensor, an actinometer, and a GPS.
    Figure 13A is a schematic view showing a PHI light distribution configuration formed when the light emitting diode units 152a, 152b, 152c are turned on in a state where the rotary reflector 26 is stopped, and Figure 13B is a view schematic showing a PH2 light distribution configuration formed when the light emitting diode units 152a, 152b, 152c are turned on in a state where the rotary reflector 26 is rotated.
    The PHI light distribution configuration shown in FIG. 13A is obtained by superimposing and combining a first irradiation beam Bl emitted by the light-emitting diode unit 152a, a second light-emitting B2 radiation beam 152b, d ' irradiation B3 emitted emitted by the diode unit and a third beam by the light-emitting diode unit 152c.
    As shown in FIG. 13B, the rotary irradiation reflector Pl of irradiation Bl first configuration the first beam the diode unit
    6 forms a by scanning emitted by light-emitting 152a, forms a second irradiation configuration P2 by scanning the second irradiation beam B2 emitted by the light-emitting diode unit 152b, forms a third irradiation configuration P3 by scanning a third beam B3 emitted by the light-emitting diode unit 152c, and forms a high beam light distribution configuration PH2 by superimposing the first irradiation configuration P1 on the third irradiation configuration P3.
    By controlling the switching on / off of the light-emitting diode units 152a, 152b, 152c, the optical unit 150 according to the present embodiment can also form a partially masked light distribution configuration as shown in the figure. 6.
    FIG. 14A is a view showing a state of irradiation by a light masking light distribution configuration in the case where a vehicle at the front is present in front of a vehicle while moving on a straight road , and Figure 14B is a schematic view for explaining the light masking light distribution configuration shown in Figure 14A.
    As shown in Figure 14A, the amount of movement in a right and left direction of a vehicle in front F moving on a straight road L1 is expected to be small. Consequently, it is preferable to narrow the range of light masking S as much as possible so as to irradiate as far as the vicinity of the two sides of the vehicle at the front F. In addition, the timing of switching on / off of the units respective light emitting diode is controlled so that a vertical section line CL1 which is a boundary of the light masking portion S appears more marked.
    More specifically, as shown in FIG. 14B, the control part 154 controls the timing for changing the light emission intensity of the light-emitting diode units 152a to 152c so that a first configuration irradiation Pl in which a first light masking part S1 is formed is formed, a second irradiation configuration P2 in which a second light masking part S2 is formed is formed, a third irradiation configuration P3 wherein a third light masking portion S3 is formed is formed, and the respective ranges of the first light masking portion S1 to the third light masking portion S3 substantially coincide with each other.
    FIG. 15A is a view showing a state of irradiation by a light masking light distribution configuration in the case where a vehicle at the front is present in front of a vehicle while it is moving on a curved road, and Figure 15B is a schematic view for explaining the light masking light distribution configuration shown in Figure 15A.
    As shown in Figure 15A, the amount of movement in the right and left direction of the vehicle ahead of F moving on a curved road L2 is expected to be large. Therefore, when the light is irradiated to the vicinity of both sides of the vehicle at the front F, there is a possibility of dazzling an occupant of the vehicle at the front F. In addition, when a vertical cutting line CL2 which is a limit of a part of masking of the light If it is too frank, there is a possibility that a driver feels a feeling of discomfort when the light is projected on a shoulder L3. Therefore, the timing of switching on / off of the respective light emitting diode units is controlled so that the vertical section line CL2 is blurred. More specifically, as shown in FIG. 15B, the control part 154 controls the timing for controlling the light emission intensity of the light-emitting diode units 152a to 152c so that a first configuration irradiation Pl 'in which a first light masking part S1' is formed, a second irradiation configuration P2 'in which a second light masking part S2' is formed, and a third irradiation configuration P3 'in which a third light masking part S3' is formed are formed, and the respective areas of the first light masking part S1 'to the third light masking part S3' are offset one compared to each other.
    In this way, although the areas adjacent to the two ends of the light masking portion S 'are scanned only by the first irradiation beam B1 or the third irradiation beam B3, the outside of those -this is scanned with a plurality of scanning beams. Therefore, the change in brightness in the vicinity of the light / dark limit of the light masking portion S 'can be achieved in stages. Here, the change in brightness is, for example, a function of a change in brightness relative to a change in position of the scanning direction of the light distribution pattern.
    In addition, the control part 154 is configured to be capable of executing a first light masking mode (see FIG. 15B) in which an offset Δ1 of the range of the first light masking part SI 'relative to the range of the third light masking part S3' is relatively large, and a second mode of light masking (see FIG. 14B) in which an offset Δ2 (Δ2 <Δ1) of the range of the first light masking part S1 with respect to the range of the third light masking part S3 is relatively small. In the example of FIG. 14B, the offset Δ2 is almost zero (Δ2 "0) and not shown since the respective ranges of the first part of light masking SI to the third part of light masking S3 substantially coincide l to one another. In this way, the change in brightness in the vicinity of the light / dark limit of the light masking portion can be made relatively small in the first light masking mode and can be made relatively large in the second masking mode. light.
    The control part 154 is configured to be able to execute the first light masking mode or the second light masking mode depending on the state of movement of the particular vehicle or the state in front the particular vehicle, which is acquired on the basis of the information acquired by the detection part 156. For example, the control part 154 is configured to determine whether it is a straight road or a curved road from the road shape information or steering wheel steering angle information or equivalent acquired by the sensing portion 156, and for selecting the first light masking mode or the second light masking mode based on the determination results. In this way, the change (sharpness of the vertical section line) of brightness in the vicinity of the light / dark limit of the light masking portion can be made different depending on the situation in which the optical unit 150 is used.
    Furthermore, the optical unit 150 according to the second embodiment uses three light-emitting diode units as a light source. However, even when two light emitting diode units are used as described in the first embodiment, the operational effects described above are obtained.
    Therefore, in other words, the optical unit according to the embodiment described above can also be expressed as follows. The optical unit 150 according to the present embodiment is an optical unit which forms a light distribution pattern by scanning the light respectively emitted from a plurality of light sources. The optical unit 150 forms the light masking portion in a portion of the light distribution configuration by controlling the timing of the light sources on / off. The optical unit 150 forms a light distribution configuration such that it becomes progressively brighter away from the light masking portion (see Figure 15B).
    In this way, since the light is scanned to the areas adjacent to the two ends of the light masking part so that it becomes progressively brighter away from the light masking part , the change in brightness in the vicinity of the light / dark limit of the light masking portion can be achieved in stages.
    Furthermore, during the formation of a light distribution configuration having a light masking part, before and after the irradiation beam passes through the zone corresponding to the vertical section line, not only each light emitting diode unit can be suddenly turned on to the maximum or be completely off, but also the amount of light from each light emitting diode unit can be changed in stages or continuously.
    (Third embodiment)
    In a third embodiment, a positioning between the rotary reflector and the motor driving the rotary reflector will be described. As described above, in an optical system which forms a light distribution pattern by scanning a light source image using the rotary reflector 26, it is necessary to synchronize the source on / off delay. of light and the rotation delay of the blade 26a which is a reflecting mirror of the rotary reflector 26. For this purpose, it is necessary to know beforehand the position relation between the blade 26a and the rotation position of the motor from which the signal pulse corresponding to the rotation of the motor is delivered. As the motor, a DC brushless motor or a DC brushed motor can be adopted.
    The pulse signal corresponding to the rotation of the motor is generated when the limit where the magnet of the motor changes from pole N to pole S (or from pole S to pole N) passes through a Hall effect sensor. Therefore, as a method, a mark is fixed on an axis of rotation of the motor so that the magnetization limit can be confirmed from outside the motor.
    FIG. 16A is a schematic view of an optical unit according to the third embodiment as seen from the side, FIG. 16B is a schematic view of an engine shown in FIG. 16A as seen from above, and FIG. 16C is a schematic view of the optical unit according to the third embodiment as seen from above.
    The optical unit 150 comprises the rotary reflector 26 and a motor 158. The motor 158 has a rotation shaft 158a. A front end 158b of the rotation shaft 158a is treated in a cross-sectional D shape so as to be mounted in a hole formed in the rotary part 26b of the rotary reflector 26. Furthermore, the shape of the front end 158b can be a sectional I shape. A flat part 158c of the shape of D in section of the front end 158b is then provided to be parallel to a dividing line X of magnetization. In this way, a position of magnetization limit can be easily identified from outside the motor 158. In the rotary reflector 26, a hole corresponding to the shape of D in section of the front end 158b of the rotation shaft 158a is formed in a predetermined position relation (angle a) with a limit 26c of the blade 26a. In this way, by inserting the front end 158b of the motor 158 into the hole in the rotary reflector 26, the position of the blade 26a of the rotary reflector 26 and the magnetization position of the motor 158 (the position where a pulse is delivered by a Hall effect sensor) can be precisely matched.
    A modification of the alignment between the rotary reflector 26 and the motor 158 will then be described. Figure 17A is a side view of an engine according to a modification, Figure 17B is a bottom view of the engine shown in Figure 17A, and Figure 17C is a schematic view for explaining the assembly of the engine and d '' a rotary reflector according to the modification. When it is difficult to provide a hole of a special shape such as the shape of D in section in the rotation part 26b of the rotary reflector 26, the rotation shaft 158a of the motor 158 can be extended downwards and positioned relative to the rotary reflector 26 by means of a template. For example, control this is shown in Figures 17A and 17B, a lower front end 158D of the rotation shaft 158a which penetrates through the motor 158 has a D shape in section and is inserted into the hole of a template 160 corresponding to the shape of D in section, so that the positioning of the motor 158 and of the template 160 is achieved. Then, by positioning the rotary reflector 26 relative to the template 160 (for example, by putting the blade 26a against a part of the template 160), the position of the blade 26a of the rotary reflector 26 and the magnetization position of the motor 158 can be precisely positioned.
    The present invention has been described above with reference to each of the embodiments described above. However, the present invention is not limited to each of the embodiments described above, but a suitable combination or substitution for the configurations of the embodiment is also intended to be included in the present invention. In addition, based on the knowledge of those skilled in the art, the combination or order of processing in each embodiment can be appropriately changed or a modification such that different design changes can be added to each form. of achievement. An embodiment to which such a modification is added may also be included within the scope of the present invention.
    权利要求:
    Claims (6)
    [1" id="c-fr-0001]
    1. Optical unit characterized in that it comprises:
    a first light source (28a) configured to emit a first radiation beam;
    a second light source (28b) configured to emit a second radiation beam;
    a scanning portion configured to form a first irradiation pattern by scanning the first irradiation beam, to form a second irradiation pattern by scanning the second irradiation beam, and to form a light distribution configuration by overlapping the first irradiation pattern and the second irradiation pattern, and a control portion configured to control the light emission intensity of the first light source (28a) and the light emission intensity of the second light source (28b), wherein the control portion is configured to control a time delay for changing the light emission intensity of the first light source (28a) and a time delay for changing the intensity d emitting light from the second light source (28b) such that a first light masking portion is formed in a tie of the first irradiation pattern, a second light masking portion is formed in a portion of the second irradiation pattern so as to overlap the first light masking portion, and a range of the first portion of light masking and a range of the second light masking portion are offset from each other.
    [2" id="c-fr-0002]
    2. Optical unit according to claim 1, in which the control part is configured to be able to execute:
    a first light masking mode in which an offset of the range of the first light masking portion and the range of the second light masking portion is relatively large; and a second light masking mode in which an offset of the range of the first light masking portion and the range of the second light masking portion is relatively small.
    [3" id="c-fr-0003]
    3. The optical unit according to claim 2, wherein the control part is configured to be able to execute the first light masking mode or the second light masking mode according to a moving state of a particular vehicle or a state in front of the particular vehicle.
    [4" id="c-fr-0004]
    4. An optical unit according to any one of claims 1 to 3, wherein the scanning part comprises a rotary reflector (26) which is configured to rotate in a direction around its axis of rotation (R) while reflecting from the light emitted from the first light source (28a) and the second light source (28b).
    [5" id="c-fr-0005]
    5. Optical unit configured to form a light distribution pattern by scanning the light respectively emitted from a plurality of light sources, to form a mask portion.
    5 light in part of the light distribution pattern by controlling an on / off time delay of the light sources, and to form the light distribution pattern so that it becomes progressively brighter
    [6" id="c-fr-0006]
    10 when it moves away from the light masking portion.
    1/15
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    同族专利:
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    JP2018073485A|2018-05-10|
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    CN108375017A|2018-08-07|
    JP6796993B2|2020-12-09|
    DE102017218777A1|2018-04-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP4928372B2|2007-07-12|2012-05-09|株式会社小糸製作所|Vehicle lighting device|
    CN104976564B|2010-04-13|2017-11-14|株式会社小糸制作所|Optical unit and vehicle monitor apparatus|
    JP5698065B2|2011-04-22|2015-04-08|株式会社小糸製作所|Obstacle detection device|
    JP5702216B2|2011-04-22|2015-04-15|株式会社小糸製作所|Optical unit|
    JP5815995B2|2011-06-08|2015-11-17|株式会社小糸製作所|Optical unit for vehicular lamp|
    JP5831751B2|2011-11-16|2015-12-09|スタンレー電気株式会社|Vehicle headlamp|
    DE102012223658A1|2012-12-18|2014-06-18|Automotive Lighting Reutlingen Gmbh|Motor vehicle headlight with a glare-free high beam|
    JP6349139B2|2014-04-23|2018-06-27|株式会社小糸製作所|Lighting control system|
    JP6453669B2|2015-02-27|2019-01-16|トヨタ自動車株式会社|Vehicle headlamp control device|JP6886821B2|2017-01-20|2021-06-16|株式会社小糸製作所|Optical unit|
    KR101908308B1|2017-04-12|2018-10-16|엘지전자 주식회사|Lamp for Vehicle|
    JP6985082B2|2017-09-25|2021-12-22|スタンレー電気株式会社|Vehicle headlight control device|
    TWI651489B|2018-01-29|2019-02-21|誠益光電科技股份有限公司|Smart headlight|
    JP2019200952A|2018-05-18|2019-11-21|トヨタ自動車株式会社|Vehicular headlight device|
    CN110566899A|2018-05-18|2019-12-13|丰田自动车株式会社|Vehicle headlamp apparatus|
    EP3859204A1|2018-09-28|2021-08-04|Ichikoh Industries, Ltd.|Vehicle lamp|
    US20210341127A1|2018-10-19|2021-11-04|Koito Manufaturing Co., Ltd.|Vehicle lamp, lamp unit, and reflector module|
    WO2020080134A1|2018-10-19|2020-04-23|株式会社小糸製作所|Vehicular lamp and rotary reflector|
    CN113994140A|2019-06-20|2022-01-28|株式会社小糸制作所|Vehicle lamp and control method for vehicle lamp|
    法律状态:
    2018-08-31| PLFP| Fee payment|Year of fee payment: 2 |
    2019-08-28| PLFP| Fee payment|Year of fee payment: 3 |
    2020-08-26| PLFP| Fee payment|Year of fee payment: 4 |
    2021-07-23| PLSC| Search report ready|Effective date: 20210723 |
    2021-09-07| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016208063|2016-10-24|
    JP2016208063A|JP6796993B2|2016-10-24|2016-10-24|Optical unit|
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