• 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 road surface signal lamp unit (4, 31) comprises a light source module (12, 32) and an optical system (13, 33). In the light source module (12, 32), a plurality of light sources individually corresponding to signaling patterns, each of which is long in a first direction which is the direction of the width of the road and runs in a second direction which intersects the direction of the width of the road and the axis of emission of the light sources, are arranged so that the signaling patterns are plotted at a plurality of locations on the road in the second direction and the light sources are formed to be turned on and off independently. The optical system (13, 33) emits light emitted by the light sources forwards.
    公开号:FR3029598A1
    申请号:FR1561871
    申请日:2015-12-04
    公开日:2016-06-10
    发明作者:Yuichi Shibata；Noriko Sato；Takeshi Masuda
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD [0001] The present invention relates to a road surface lamp unit, configured to draw on the surface of a road an information indicating that a vehicle is approaching, so as to be easily recognized by a vehicle. pedestrian who is in a blind spot on the road and is out of sight of the driver of the vehicle. BACKGROUND ART [0002] JP-A-2008-45870 discloses a signaling system which draws a warning marking 53 reproducing a road sign prohibiting entry or a warning mark 55 of an arrow with a stop line connected to the distal end of the boom on the surface of a road in front of a vehicle and located at the entrance of a road where entry and circulation of the vehicle are prohibited, as described or illustrated in paragraph [0053] or in Figure 5 of the JP-A2008-45870 description so as to warn the driver not to enter the road. It is desirable that the device tracing a warning which is activated by the vehicle is properly recognized, not only by the driver, but also by a pedestrian as information indicating that the vehicle is approaching and preventing the pedestrian enter the road towards which the vehicle approaches. The circular warning marking 53 illustrated in Figure 4 of JP-A-2008-45870 is drawn by the signaling system so as to be lengthened longitudinally in the direction of movement of the vehicle so as to be seen as "Circular" by the driver who observes obliquely down the warning mark on the surface of the road. However, since the marking seen by the driver as circular is only seen by the pedestrian who is on the road that intersects the road on which the vehicle approaches as a non-significant marking which is longitudinally deformed in the direction of travel of the vehicle, there is a problem that it is difficult for the pedestrian to recognize the fact that the vehicle is approaching.
    [0002] In addition, the mark 53 of 3121-A-2008-45870 does not appear circular unless the mark is drawn in such a way as to be more elongated when the mark is drawn to a position farther from the vehicle. As a result, the light is diffused so strongly in the fore-and-aft direction that the marking disappears, causing fear that the pedestrian will enter the road towards which the vehicle approaches without recognizing that the vehicle is approaching. . SUMMARY OF THE INVENTION [0005] In view of the problem described above, the present invention provides a road surface lamp unit, configured to draw a simple schematic pattern that is easily recognizable by a pedestrian in a position. predetermined on the surface of a road on which a vehicle is traveling, so that a pedestrian who is in a blind spot, invisible to the driver, on a road that intersects the road to which the vehicle approaches, may recognize quickly and accurately the fact that the vehicle approaches and the direction in which the vehicle approaches. [0006] A road surface traffic light lamp comprises a light source module in which a plurality of light sources corresponding individually to signaling patterns, long in a first direction which is the direction of the width of the road and short. in a second direction which intersects the direction of the width of the road 25 and an emission axis of the light sources, are arranged so that the signaling patterns are plotted at a plurality of locations on the road in the second direction and the light sources are formed to be turned on and off independently, and an optical system that emits light emitted by the light sources forward. [0007] (Function) As a consequence of the short-distance signaling patterns (length in the direction of extension of the road) with respect to the width formed towards the front of the vehicle in the direction in which the road extends , even if the signaling patterns are traced in a position farther from the vehicle, the light becomes difficult to diffuse and the signaling patterns having the clearly defined contour and rendered 3029598 long in the width direction are formed on the surface of the vehicle. the road ahead and farther from the vehicle. In the road surface lamp unit, signaling patterns which extend in the form of rods in the width direction of the road are formed sequentially in the second direction. (Function) Since the rod-shaped signaling patterns are formed with a short depth in relation to the width, even if the signaling patterns are traced in the farthest position of the vehicle, it is difficult to diffuse the light in the front-back direction. In addition, the rod-shaped signaling patterns which are sequentially formed in the vertical direction are recognized by the pedestrian on the road as markings moving in the direction of movement of the vehicle over the surface of the road. the road. [0010] In the road surface lamp unit, a signaling pattern which illuminates further from the vehicle is drawn shorter in the second direction than a signaling pattern which illuminates closer to the vehicle. [0011] Normally, a signaling pattern that illuminates the surface of the remote road of a vehicle is traced with a greater depth in the direction of extension of the road than a signaling pattern that is traced on the road. road surface near the vehicle. As a result, the light which forms the signaling pattern traced on the road surface remote from the vehicle tends to diffuse more easily in the direction of extension of the road than the light which forms the signaling pattern traced on the surface. from the road close to the vehicle. [0012] (Function) However, in the case where the length of a signaling pattern which is drawn further from the vehicle in relation to the second direction (direction which intersects the direction of the width of the road and the axis 35 emission of the right angle light sources) is formed shorter than the length of a signaling pattern which is traced closer to the vehicle in relation to the second direction, the signaling patterns traced on the road surface spread evenly regardless of the distances from the vehicle to the positions where the signaling patterns are plotted, so that the pedestrian can see the rod-like signaling patterns having similar shapes moving in the direction of moving the vehicle. In the road surface lamp unit, the light sources emit beams of light which extend in a rectangular range which extends in the direction of the width of the road to the optical system. and the optical system forms rod-shaped signaling patterns from the light beams to the front of the vehicle. (Function) The optical system modifies light beams that diffuse in the rectangular range into beams of light that converge toward the rod-shaped range for transmission to the surface of the road in front of the vehicle, so that the signaling patterns which extend in a rod-like manner in the direction of the width of the road are formed in front of the vehicle. It is made difficult for the outlines of the rod-shaped signaling patterns to disappear, even if they are drawn in positions located away from the vehicle. In the road surface lamp unit, the optical system consists of a projection lens or a reflection mirror. (Function) The projection lens or reflection mirror forms the signaling patterns which are shorter in the front-to-back direction than the width in front of the vehicle, so that on the signaling patterns traced on the surface of the road, even if they are formed in positions situated far from the vehicle, it is difficult to diffuse the light forming the signaling patterns in the front-to-back direction, so that the signaling patterns having the outline clearly defined and rendered 3029598 long in the width direction are plotted on the surface of the road remote from the vehicle. According to the road surface lamp unit, since the contours of the signaling patterns do not disappear even if the signaling patterns are formed on the surface of the road situated far from the vehicle, the pedestrian who walks or who stands on the road can quickly and accurately recognize the signaling patterns as information informing him of the approach of the vehicle. According to the road surface lamp unit, the pedestrian can more quickly and accurately recognize the approach of the vehicle by observing markings having clearly defined contours moving in the direction of movement of the vehicle. According to the road surface lamp unit, the pedestrian can more quickly and accurately recognize the approach of the vehicle by recognizing that the rod shaped signaling patterns of similar shape are moving in the direction of the vehicle. of vehicle movement. According to the road surface lamp unit, since the contours of the signaling patterns do not disappear even if the signaling patterns are traced on the surface of the road 25 located away from the vehicle, the walking pedestrian or who stands on the road can quickly and accurately recognize the signaling patterns as information informing him of the approach of the vehicle. According to the road surface lamp unit, by observing the signaling patterns traced on the surface of the road, the contours of which are made difficult to disappear, the pedestrian who walks or stands on the road may quickly and accurately recognize signaling patterns as information informing them of the approach of the vehicle.
    [0003] BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better 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. FIG. 1 is a front view of a vehicle lamp incorporating a road surface lamp unit according to a first embodiment. Figure 2 is a sectional view along the line I-I of Figure 1.
    [0004] Fig. 3A is a sectional view along line II-II of Fig. 1 and Fig. 3B is a perspective view of light sources and a projection lens viewed from the front of a vehicle. Fig. 4 is a vertical sectional view of a vehicle lamp incorporating a road surface lamp unit according to a second embodiment. Fig. 5 is a block diagram explaining a control unit. Fig. 6A is an explanatory diagram showing an optical path pattern in vertical section which is formed by the road surface traffic lamp unit according to the first embodiment, and Fig. 6B is an explanatory diagram showing the pattern of optical path in horizontal section which is formed by the traffic light lamp unit according to the first embodiment. Fig. 7 is an explanatory diagram showing a vertical section optical path pattern which is formed by the road surface lamp unit according to the second embodiment. Fig. 8 is an explanatory diagram in relation to the shapes of the signaling patterns which are projected by light emitting elements on an imaginary plane at right angles to the optical axes of the light sources. Figure 9 is an explanatory diagram in relation to the depths of the signaling patterns that are drawn on the surface of a road after crossing the imaginary plane.
    [0005] DETAILED DESCRIPTION [0023] Embodiments of the present invention will be described hereinafter based on FIGS. 1-9. In these figures, various directions, namely, the directions high, low, left, right The front and rear of a vehicle and a roadside traffic lamp unit as seen from the driver's seat will be respectively indicated by Up, Lo, Le, Ri, Fr and Re. [0024] FIGS. 1 to 3B represent a vehicle lamp 1 including a first embodiment of a road surface lamp unit. The vehicle lamp 1 represents an example of a right headlamp and comprises a lamp body 2 having an opening portion on one side facing towards the front of the vehicle and a transparent or translucent front cover 3 which closes the part of the vehicle. opening. A road surface signal lamp unit 4 according to the first embodiment, a light source unit forming a light distribution pattern 5, sighting supports 6, 7, a pivot unit 8, a plurality of aiming screw 9, extension reflectors 10 and a control unit 11 are received inside a lamp compartment S which is defined inside the lamp body 2 and the front cover 3. L the location of the road surface signal lamp unit 4 is not limited to the interior of the vehicle lamp 1 and thus the road surface lamp unit 4 can be arranged at the traffic light unit 4. outside the vehicle lamp 1, such as on the roof of the vehicle (not shown) for example. [0025] The road surface lamp unit 4 shown in FIGS. 1 to 3B comprises the control unit 11, a light source module 12 and a transparent toric lens 13 (projection lens) constituting a system. optical. The light source module 12 consists of a metal lens holder 14, an LED matrix 15 constituting a light source and a pair of reflectors 16, 17. As shown in FIGS. 3A and 3B, the lens holder 14 consists of a hollow box-shaped main body portion 14a, a light source support portion 14b, a plurality of heat dissipating fins 14c and bearing parts 14d, 14e. The main body portion 14a consists of an upper plate 14f, a lower plate 14g and left and right side plates 14h, 14i. The bearing portions 14d, 14e are respectively formed on the outer sides of the bottom plate 14g and the top plate 14f, and are attached to first and second pivot shafts 23, 24 which will be described later. The light source support portion 14b is integrally formed on the inner side of the main body portion 14a as a right angle separation plate with respect to the top plate 14f, the bottom plate 14g and the side plates. left and right 14h, 14i. The LED array 15 is attached to the front surface 14j of the light source support portion 14b through a substrate 15a and the vanes of the plurality of heat sink fins 14c are disposed on the back surface. of the light source support portion 14b so as to extend rearward in parallel with each other. An opening portion at the forward end of the main body portion 14a is closed by the toric lens 13 which is attached to the front end of the main body portion 14a. The LED array 15 is disposed near the back focus of the toric lens 13, and the rear surface 13a of the toric lens 13 is turned towards the LED array 15 as shown in FIG. 3A. The LED matrix light 15 passes through the toric lens 13 and the front cover 3 and traces a signaling pattern on the road surface in front of the vehicle. In addition to the toric lens 13 according to the first embodiment, a cylindrical lens may also be adopted as the projection lens of the light source module 12. However, it is more desirable to adopt a toric lens. Although a toric lens and a cylindrical lens similarly display a strip-shaped or rod-like signaling pattern which is long in the width of the road (left-right direction of the vehicle) and running in the direction of road extension, the cylindrical lens can not form a signaling pattern having a uniform depth because in a signaling pattern formed by it, the depth gradually decreases towards the center of the pattern of signaling, while the toric lens can form a signaling pattern having a uniform depth in the direction of road extension and as a result, the toric lens is more desirable than the cylindrical lens to trace a clearer signaling pattern. band-shaped or rod-shaped. The LED array 15 according to the first embodiment is formed by the arrangement of a plurality of combinations of LED light emitting elements, each consisting of a plurality of LED light emitting elements. 18 to 21 vertically and vertically arranged horizontally laterally in the horizontal direction on the front surface of the substrate 15a. The LED light emitting elements 18 to 21 are arranged to be oriented in the same direction and are controlled to be turned on and off independently by the control unit 11. Although only one combination of a plurality of vertically arranged LED light emitting elements 18 to 21 can be provided, to trace a signaling pattern which is long in the width direction of the road, it is desirable to arrange a plurality of such combinations. LED light emitting elements laterally in the horizontal direction to diffuse the light with a light flux sufficient in the direction of the width of the road. In the first embodiment, two combinations of four vertically arranged LED light emitting elements 18 to 21 are arranged laterally in the horizontal direction. However, the number of LED light emitting elements which are arranged in the vertical direction and the number of combinations of LED light emitting elements which are arranged laterally in the horizontal direction are not limited thereto. The reflectors 16, 17 are disposed on the left and right sides of the LED light emitting elements 18 to 21 on the light source support portion 14b of the lens holder 14. The reflectors 16, 17 are formed of to extend like a plate so as to move away from each other as they extend obliquely forwards from the light source support portion 14b to cover thus the LED light emitting elements 18 to 21 from their left and right sides. The reflectors 16, 17 reflect the light emitted by the LED light emitting elements 18 to 21 towards the rear surface 3029598 of the toric lens 13 so that the light is not incident on the left and right side plates 14h , 14i of the lens holder 14, thus limiting the lateral scattering of the light emitted by the LED light emitting elements 18 to 21. [0030] The light emitted by the LED array 15 diffuse with respect to an axis of emission Ll (axis which passes through the horizontal and vertical center of a lighting range by means of light beams of all LED light emitting elements 18 to 21) and is emitted towards the front of the vehicle through the toric lens 13 and the front cover, forming a signaling pattern. The light source module 12 to which the toric lens 13 is attached is fixed to the lamp body 2 by the aiming supports 6, 7, the pivoting unit 8 and the plurality of aiming screws 9. Three screws 9 are provided for each of the road surface indicator lamp units 4 and the light source unit forming the light distribution pattern 5 and are attached to the lamp body 2. One of the three sighting screws 9 of each of the road surface signal lamp units 4 and 20 of the light source unit 5 forming the light distribution pattern 5 is reciprocated in one direction and the other by means of a motor unit 22, so that the road surface lamp unit 4 and the light source unit forming the light distribution pattern 5 are vertically inclined independently. The sights 6, 7 each have a plate shape. The sighting supports 6, 7 are supported by the sighting screws 9 at one of their ends, and shaft fixing parts 6a, 7a at the other end of the sighting supports 6, 7 are bent towards the before. The pivot unit 8 is attached to the aiming screw 6 which is provided below the road surface signal lamp unit 4 and the pivot unit 8 rotates the first pivot shaft 23 by means of an engine incorporated therein. The first pivot shaft 23 projects upwardly from a hole 6b formed in the shaft attachment portion 6a to be secured to the bearing portion 14d of the lens holder 14. A hole 7b is provided in the shaft fixing portion 7a of the aiming support 7 which is provided above the road surface indicator lamp unit 4. The second pivot shaft 24 is attached to the bearing portion 14e of the carrier. lens 14 and the second pivot shaft 24 is rotatably held on the shaft fixing portion 7a of the sighting support 7 via the hole 7b. The traffic surface signal lamp unit 4 is rotatably supported on the sight supports 6, 7 via the first and second pivot shafts 23, 24 and pivots horizontally to the left and to the right. the line with respect to the central axis L2 of the first and second pivot shafts 23, 24 by rotating the first pivot shaft 23 by means of a drive source (a motor) of the pivot unit 8. [0034] A road surface lamp unit according to a second embodiment will then be described. Fig. 4 shows a vehicle lamp 30 including a road surface lamp unit 31 according to the second embodiment. The vehicle lamp unit 30 according to the second embodiment has the same configuration as that of the vehicle lamp 1 according to the first embodiment, excluding the road surface lamp unit 31 The road surface lamp unit 31 shown in FIG. 4 comprises a control unit 11, a light source module 32 and a reflector 33 constituting an optical system. The light source module 32 is comprised of a resin light source support portion 34 and an LED array 35. The reflector 33 is integrally formed on the light source support portion 34 at the its rear end portion 34a and is disposed below the light source support portion 34. The reflector 33 is shaped into a paraboloidal shape and has a reflection surface 33a which is formed by deposition of aluminum or the like on its front surface. Similar to the road surface lamp unit 4 according to the first embodiment, the road surface lamp unit 30 may also be disposed outside the vehicle lamp 30 (FIG. for example, on the roof of a vehicle, not shown). As shown in FIG. 4, the LED array 35 is attached to the lower surface 34c of the light source support portion 34 through a substrate 35a. The LED array 35 is formed by arranging a plurality of combinations of LED light emitting elements each consisting of a plurality of white and green LED light emitting elements 36 to 39 which are arranged to be aligned. from the back to the front on the lower surface of the substrate 35a. The LED light emitting elements 36 to 39 are arranged to be oriented in the same direction and are controlled to be turned on and off independently by means of the control unit 11.
    [0006] Although only one combination of a plurality of LED light emitting elements 36 to 39 which are arranged to be aligned from the rear to the front can be provided, it is desirable to arrange a plurality of LED light emitting elements 36 to 39. such combinations of LED light emitting elements laterally in the horizontal direction. In the second embodiment, two combinations of four LED light emitting elements 36 to 39 which are arranged in the front-to-back direction are arranged laterally in the horizontal direction (the combination of a left-side LED is omitted) . However, the number of LED light emitting elements that are arranged in the front-to-back direction and the number of combinations of LED light emitting elements that are arranged laterally in the horizontal direction are not limited thereto. The light emitted by the LED matrix 35 is reflected forwards by the reflection surface 33a of the reflector 33, then diffuses with respect to a transmission axis L4 (axis which passes through the vertical and horizontal center the illumination range of the beams of lights that are emitted by all the LED light emitting elements 36 to 39 and which are then reflected by the reflector 33. Refer to Figure 7). The light is then emitted forward from the front cover and forms a predetermined signaling pattern on the surface of a road in front of the vehicle. In addition, a support portion 33b is provided on the outer side of the reflector 33 and a support portion 34b is provided on the outer side of the light source support portion 34 so as to be coaxial. (along the central axis L3) with the support portion 34b. The road surface lamp unit 31 is supported on the lamp body 2 so as to rotate with respect to the vertically extending central axis L3, securing the first pivot shaft 23 to the portion of the housing. 33b and fixing the second pivot shaft 24 to the bearing portion 34b and pivots 10 laterally in the horizontal direction relative to the central axis L3 when the pivot unit 8 is driven. Referring to Figure 5, the control unit 11 will next be described. The control unit 11 comprises a lamp ECU (electronic control unit) 41, a ROM 42 and a RAM 43. The lamp ECU 41 comprises a light source control module 44 and a light source control module 44. Pivoting 45. Various control programs are stored in the ROM 42 and the lamp ECU 41 executes in the RAM 43 the control programs stored in the ROM 42 for generating various control signals. The light source control module 44 is connected to the LED light emitting elements 18 to 21 according to the first embodiment or the LED light emitting elements 36 to 39 according to the second embodiment. intermediate of a lighting control circuit 46 of the LED array 15 (LED array 35 according to the second embodiment). The pivot control module 45 is connected to a swivel drive unit 47 which controls the drive source (the motor, not shown) of the swivel unit 8.
    [0007] The swivel drive unit 47 rotates the first swivel shaft 23 shown in FIGS. 2 and 4 with respect to the central axis L2 based on a control signal of the lamp ECU 41 so that rotating the road surface signal lamp unit 4 (the road surface signal lamp unit 31 according to the second embodiment) laterally in the horizontal direction. The light source control module 44 performs a control such that the LED light emitting elements 18 to 21 which are arranged vertically according to the first embodiment and the LED light emitting elements 36 to 39. which are arranged in the front-to-back direction according to the second embodiment are switched on and off individually and independently. In addition, since the plurality of LED light emitting elements 18 to 21 and the plurality of LED light emitting elements 36 to 39 are laterally arranged horizontally in the first and second embodiments, the module The light source control unit 44 performs control such that the LED light emitting elements that are laterally aligned in the horizontal direction in the same row are turned on and off at the same time or individually and independently. Independent switching on and off of the LED light emitting elements which are arranged laterally in the horizontal direction is desirable to change the width of a signaling pattern based on the number of LED light emitting elements. which are turned on and forming a plurality of signaling patterns which are laterally divided in the horizontal direction forming an extinguished portion between the LED light emitting elements which are lit continuously (this being limited only in case where at least three combinations of LED light emitting elements are arranged laterally in the horizontal direction). An image processing unit 48 and a pedestrian detection sensor 49 are connected to the lamp ECU 41. An on-board recording device 50 and a road surveillance shooting device 51 are connected to the image processing unit 48 and the road surveillance camera 51 is connected to the image processing unit 48 via a communication line such as Internet. The on-board recording device 50 is mounted on the vehicle together with the road surface signal lamp unit 4, 31. The road surveillance camera 51 comprises a video recording device. intersection which is disposed at an intersection and a surveillance camera which is positioned near the road. The pedestrian detection sensor 49 sends pedestrian detection data on the road to the lamp ECU 41 and the on-board camera 50 and the surveillance camera 5. Route 51 sends to the image processing unit 48 pedestrian-related imagery data near the vehicle. In the case where a pedestrian on the road is detected by the pedestrian detection sensor 49 and an image of the pedestrian on the road is obtained as a result of the analysis by the image processing unit 48, the The lamp ECU 41 controls the illumination control circuit 46 of the LED array 15, 35 and the swivel drive unit 47 so as to trace a predetermined signaling pattern in a predetermined position on the road to warn. the pedestrian on the road or the driver of another vehicle. Referring to FIGS. 6A-9, the shapes of the road surface signaling patterns that are plotted by the first and second road surface signaling lamp units 4, 31 will then be described. The reference numeral L5 indicates an axis extending in the direction of the width (first direction) of the road and the reference numeral L6 in FIG. 8 indicates an axis (second direction) which cuts at the same time the L5 axis in the direction of the width of the road and the transmission axis L1 (L4 in Figure 7) at right angles. Fig. 6A shows an optical path pattern on a vertical section of the road surface traffic lamp unit 4 according to the first embodiment and Fig. 6B shows an optical path pattern on a horizontal section of the unit. The traffic surface signal lamp unit 4 according to the first embodiment shown in FIG. 6A is inclined downwards so that the transmission axis L1 LED light emitting elements 18 to 21 which are light sources are directed downward at an angle O1 with respect to the horizontal axis LO of the LED array 15 which extends in the forward-backward direction of the vehicle by means of the engine unit 22 (see FIG. 2) to which the aiming screw 9 is fixed. In FIG. 6A, rays of light emitted by the emitting elements 3029598 16 of LED light 18 to 21 who are ag Sequential downwardly in the vertical direction are respectively indicated by r1 to r4 and the light beams formed by the rays of light r1 to r4 are respectively indicated by R1 to R4. In Fig. 6B, the light rays emitted by the combinations of LED light emitting elements 18 to 21 which are arranged laterally in the horizontal direction are indicated by r5 and a light beam formed by the r5 light rays is indicated by R5. The right beams R1 to R4 of FIG. 6A pass through the toric lens 13 so as to be converged at heights h1 to h4, which are respectively defined along an axis L6, then through the front cover 3. for tracing a signaling pattern on the surface of a road ahead of the vehicle in a vertically inverted manner.
    [0008] The light beam R 5 of FIG. 6B passes through the toric lens 13 so as to be converged on a width W 1 and then passes through the front cover 3 to trace a rod-shaped or strip-shaped signaling pattern on the road surface in front of the vehicle. FIG. 7 shows an optical path pattern on a vertical section formed by the road surface lamp unit 31 according to the second embodiment. In the reflector 33 of the road surface lamp unit 31 according to the second embodiment shown in FIG. 7, the reflection surface 33a is formed so that the emission axis L4 of the reflected light resulting when the light emitted by the LED light emitting elements 36 to 39 which are light sources is reflected, is directed downwards by an angle O 2 with respect to a horizontal axis LO which extends in the forward direction -back of the vehicle. In Fig. 7, the light rays emitted by the LED light emitting elements 36 to 39 which are arranged to be sequentially aligned from back to front are respectively indicated by r7 to r10 and the beams of light formed by the rays of light r7 to r10 are respectively indicated by R7 to R10. In Fig. 7, the light beams R7 to R10 are reflected by the reflection surface 33a so as to converge respectively at heights h1 to h4 which are defined along an axis L6, tracing a signaling pattern to 3029598 17 the road surface in front of the vehicle. The distances of the vehicle to the signaling pattern traced on the road surface by the light beams R7 to R10 are proportional to the distances from the positions of the LED light emitting elements 36 to 39 to the surface of the beam. reflection 33a. Since the LED light emitting elements 36 to 39 are arranged to move progressively away from the reflection surface 33a, the signaling patterns traced by the light beams R7 to R10 are traced on the surface of the road in such a way that to be shifted in the forward-to-back direction in the vehicle traveling direction in accordance with the longitudinal arrangement of the LED light emitting elements 36 to 39. FIG. 8 shows signaling patterns P1 to P4 (FIG. signal patterns P5 to P8 of the second embodiment shown in FIG. 7) plotted by the LED light emitting elements 18 to 21 (LED light emitting elements 36 to 39 of the second embodiment shown in FIG. ) assuming that there exists an imaginary plane A1 which intersects the transmission axis L1 (transmission axis L4 of the second embodiment shown in FIG. 7) in FIG. 20 right angle. As shown in FIG. 6A, the light beams R1 to R4 formed by the LED light emitting elements 18 to 21 according to the first embodiment which are arranged sequentially downward in the vertical direction illuminate. towards the front of the vehicle in a vertically inverted manner to trace the signaling patterns P1 to P4 sequentially upward in accordance with the arrangement of the light emitting elements towards the imaginary plane A1. [0050] In addition, as shown in Fig. 7, the light beams R7 to R10 formed by the LED light emitting elements 36 to 39 according to the second embodiment which are arranged in sequence from the rear to the front of the vehicle are reflected back to the before by the reflection surface 33a of the reflector 33 in order to trace the signaling patterns P5 to P8 sequentially upwards in accordance with the arrangement of the elements The signaling patterns P1 to P4 and the signaling patterns P5 to P8 on the imaginary plane A1 are plotted so as to be long in the first direction (direction along the line). of axis L5) which is the direction of the width of the road and short in the second direction (direction along axis L6) which intersects both axis L5 and axis of emission L1. at right angles, so that the resulting signaling patterns are shaped as a rod or strip. In FIGS. 6A to 8, the reference number W1 indicates the widths W1 of the signaling patterns P1 to P4 and the signaling patterns P5 to P8 and the reference numerals hi to h4 indicate the heights of the signaling patterns P1 to P4. and signaling patterns P5 to P8 in the imaginary plane A1. In the case where signaling patterns P1 to P4 and signaling patterns P5 to P8 in the form of a strip or in the form of a rod are drawn, for example, on a road 15 with two traffic lanes where the subject vehicle can circulate in such a way as to spread over the entire width of the taxiway having a width of 4 meters, W1 = 4 m, hi = h2 = h3 = h4 = 0, 5 m. The toric lens 13 is then formed and the LED light emitting elements 18 to 21 are arranged in the first embodiment and the reflection surface 33a of the reflector 33 is formed and the LED light emitting elements 36 to 39 are arranged in the second embodiment, so that the width W1 is formed sufficiently long relative to the heights h1 to h4 in the second direction. On the signaling patterns P1 to P4 and the P5 to P8 signaling patterns in the shape of a strip or rod-shaped which are drawn on the road surface in the manner described above, the density of the beams of light in the second direction of the imaginary plane Al becomes large and accordingly, in the case where the beams of light obliquely illuminate down towards the road surface, it becomes difficult for the beam of light to be diffused into the beam. front-to-back direction, so that the beams of light can have a clearly defined outline. The signaling patterns P1 to P4 and the strip-like or pin-shaped signaling patterns P5 to P8, which are clearly defined outlines, move in the direction of movement of the vehicle together with the vehicle. , so that the pedestrian can accurately recognize the fact that the vehicle is approaching. It becomes easier for the signaling patterns P1 to P4 and 5 signaling patterns P5 to P8 strip-shaped or rod-shaped in the direction of movement of the vehicle as they are drawn further from the vehicle and accordingly, in the case where the heights of the signaling patterns P1 to P8 on the imaginary plane A1 are made uniform, the depths of the signaling patterns which are traced farther from the vehicle tend to increase, causing a problem in that their contours become less distinct. As shown in FIGS. 6A to 9, in the first and second embodiments, it is then more desirable than the signaling patterns P1 to P4 and the signaling patterns P5 to P8 in the form of a strip or in the form of a strip. of rods that are drawn on the imaginary plane Al are plotted so that the respective heights of the signaling patterns become hi> h2> h3> h4. On the imaginary plane Al, the signaling patterns that are traced at the top are traced farther than the signaling patterns that are traced at the bottom. Consequently, in the case where the height of the signaling patterns which are traced upwards on the imaginary plane A1 is made shorter than that of the signaling patterns which are traced down on the same plane, the diffusion in the direction of displacement of the vehicle can be limited, thus making the depths of the signaling patterns actually traced on the road surface uniform. FIG. 9 represents the depths d of signaling patterns P9 to P12 which are plotted on the surface of a road Ro so as to be arranged in the front-to-back direction by means of light beams R1 to R4, R7 to R10 passing through the imaginary plane A1. In the first and second embodiments, the toric lens 13 and the reflection surface 33a of the reflector 33 are formed and the LED light emitting elements 18 to 21, 36 to 39 are arranged so that the heights of the signaling patterns P1 to P4 and the rod-shaped signaling patterns P5 to P8 which are drawn on the imaginary plane A1 become h1> h2> h3> h4, so that the depths signaling patterns P9 to P12 traced individually on the road surface Ro can be made uniform. In FIGS. 6A to 8, the signaling patterns P1 to P4 and the signaling patterns P5 to P8 are drawn on the imaginary plane A1, a space C1 being provided vertically between them and the signaling patterns P9 to P12. are drawn on the surface of the road Ro, a space C2 being provided vertically between them. However, the spaces C1, C2 are provided for convenience purposes to visualize the difference of the heights h1 to h4 and the influences imposed by the difference in heights for the purposes of easy understanding and accordingly, the actual signaling patterns. Pl to P12 can be formed continuously without these spaces or can be formed so as to partially overlap.
    [0009] In this case, it is possible to form a combined signaling pattern having a clearly defined contour and a large depth. In the first and second embodiments, although the signaling patterns P1 to P4 and the band-shaped or rod-shaped P5 to P8 signaling patterns which are drawn on the imaginary plane A1 are formed of in order to have the uniform width W1, on the signaling patterns P1 to P8 which are drawn with the uniform width on the imaginary plane A1, the signaling patterns traced further along the road surface extend more widely in the direction width and 25 manage to have larger widths. In this case, a problem appears such that the contours of the signaling patterns become less clear. On the signaling patterns P1 to P8 which are traced on the imaginary plane A1, the signaling patterns which are traced at the top can then be drawn with narrower widths than those of the signaling patterns which are traced at the bottom. In this case, on the signaling patterns P9 to P12, the spread of the signaling patterns which are traced further along the surface of the road Ro in the width direction is limited and consequently the width of the signaling patterns P9 to P12 that are plotted on the road surface Ro becomes uniform. The widths of the signaling patterns P9 to P12 on the road surface Ro can be determined based on the results of the calculation of their position from an Lm1 pathway marking of a pathway. circulation of the subject vehicle, a track mark Lm2 of a traffic lane of a vehicle coming in the opposite direction and a median band Lm3 shown in FIG. 8, the image of which is formed by the on-board recording device 50 or the road surveillance shooting device 51 using the lamp CPU 41, so that the signaling patterns P9 to P12 do not exceed a predetermined range. For example, in the case where the signaling patterns P9 to P12 which are plotted with a width from the Lml lane marking to the Lm3 middle band, it is possible to warn a pedestrian located on a lane berth. of the subject vehicle as a vehicle approaches without dazzling the driver of an oncoming vehicle on the opposite traffic lane. Moreover, in the case of an oncoming vehicle on the opposite lane whose image is not formed by the on-board camera 50 or the road-monitoring device 51 by plotting the signaling patterns P9 to P12 with a width from the Lm1 lane marking to the Lm2 lane marking of the opposite lane for an oncoming vehicle, a pedestrian located on a lane berth traffic for an oncoming vehicle may also be informed that a vehicle is approaching. On the P9 to P12 signaling patterns, by turning on and off the LED light emitting elements in the order of the LED light emitting elements 18, 19, 20, 21 (in the second embodiment). in the order of the light-emitting elements 39, 38, 37, 36 by means of the control unit 11, the pedestrians see that the strip-shaped or rod-shaped signaling patterns are moving relative to the vehicle On the other hand, by turning on and off the LED light emitting elements in reverse order by means of the control unit 11, the pedestrians see the band-like or rod-shaped signaling patterns inverted with respect to the As the awareness of the presence of the signaling patterns is improved, this configuration is desirable, making it easier for pedestrians to recognize the approach of the vehicle, and the LED arrays 15, 35 may There will be various signaling patterns on the road surface by selectively controlling the LED light emitting elements to be on and the LED emitting elements to be extinguished by means of the control unit 11.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A road surface lamp unit (4, 31) comprising: a light source module (12, 32) in which a plurality of light sources individually corresponding to signaling patterns, long in a first direction which is the sense of the width of the road and short in a second direction which intersects the direction of the width of the road and an axis of emission of the light sources, are arranged so that the signaling patterns are mapped to a plurality of locations on the road in the second direction and the light sources are formed to be turned on and off independently; and an optical system (13, 33) which emits light emitted by the light sources forwards.
    [0002]
    The road surface lamp unit (4, 31) according to claim 1, wherein signaling patterns which extend in the form of rods in the direction of the width of the road are formed sequentially in the second direction. 20
    [0003]
    The road surface signal lamp unit (4, 31) according to claim 2, wherein a signaling pattern which illuminates further from the vehicle is drawn shorter in the second direction than a signaling pattern which illuminates closer to the vehicle.
    [0004]
    The road surface traffic lamp unit (4, 31) according to claim 1, wherein the light sources emit beams of light which extend in a rectangular range extending in the width direction. from the road to the optical system; and wherein the optical system (13,33) forms rod-shaped signaling patterns from the light beams to the front of the vehicle.
    [0005]
    The road surface lamp unit (4, 31) according to any one of claims 1 to 4, wherein the optical system consists of a projection lens (13). 4,302,95 98 24
    [0006]
    The road surface lamp unit (4, 31) according to any one of claims 1 to 5, wherein the optical system consists of a reflection mirror (33).
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    同族专利:
    公开号 | 公开日
    DE102015224313A1|2016-06-09|
    JP6636244B2|2020-01-29|
    CN105674199A|2016-06-15|
    FR3029598B1|2019-05-03|
    JP2016107761A|2016-06-20|
    US10160376B2|2018-12-25|
    US20160161076A1|2016-06-09|
    CN105674199B|2019-12-10|
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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 |
    2018-03-23| PLSC| Search report ready|Effective date: 20180323 |
    2018-10-29| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-31| PLFP| Fee payment|Year of fee payment: 5 |
    2021-09-10| ST| Notification of lapse|Effective date: 20210806 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014246040|2014-12-04|
    JP2014246040A|JP6636244B2|2014-12-04|2014-12-04|Road surface lighting unit|
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