Direction indication device

Abstract

It offers good light utilization efficiency, is inexpensive, has a simple configuration, and can display complex patterns. [Solution] A vehicle 200 equipped with an optical device 100 that displays a light-gathering mark 400, A light source 110 and an optical element that focuses the light emitted from the light source 110 onto the illumination surface 301, Furthermore, the deflection surface of the optical element is divided into multiple regions, and each region on the deflection surface of the optical element is The light emitted through the device forms a partial illumination image on the illumination surface 301 corresponding to each region of the deflection surface. The individual partial illumination images are combined to form at least one focusing mark 400 on the illumination surface. ru.

Description

Technical Field

[0001] The present invention relates to a traveling direction display device.

Background Art

[0002] For example, there is a technology for mounting on a vehicle and displaying a pattern of a predetermined shape such as route information on the road surface around the front of the vehicle. on the road surface.

[0003] For example, Patent Document 1 discloses, "A drawing pattern that is long in a first direction that is the width direction of a road and short in a second direction that is orthogonal to both the width direction of the road and the emission axis of a light source is drawn along the second direction at a plurality of locations on the road. A plurality of light sources corresponding to the respective drawing patterns are arranged, and each light source is formed so as to be independently capable of being turned on and off, and an optical system that emits the emitted light from the light source forward of the vehicle (abstract excerpt)". A road surface drawing lamp unit is disclosed.

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[0017] <00 Based on the information obtained from each source, at intersections in the direction of travel of a vehicle, in particular the vehicle's progress If it is anticipated that the vehicle will enter a restricted road where entry is prohibited, a warning mark will be displayed. A drawing system is disclosed that is configured to draw on the road surface in the direction of travel (summary excerpt).

[0007] Furthermore, Patent Document 5 states, "Having a headlight, a projector and a light output port, When the projector is in projector mode, the light path from the headlight to the light output is The optical image is placed and formed, and projected onto a screen. When the headlight function is activated, the headlight It is positioned so as not to obstruct the light path from the light source to the light outlet, and illuminates a predetermined area on the road. (Summary excerpt) A projection device for vehicles is disclosed.

[0008] Furthermore, Patent Document 6 states that "the light source is arranged on the outer periphery of the vehicle body and is also scattered around the vehicle body." Using multiple light-emitting diodes, a predetermined display that functions as a sign when illuminated is projected onto the road surface. (Summary excerpt) Vehicle lighting equipment is disclosed. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2016-107761 [Patent Document 2] Japanese Patent Application Publication No. 11-301346 [Patent Document 3] Japanese Patent Publication No. 2016-135629 [Patent Document 4] Japanese Patent Publication No. 2008-04587 [Patent Document 5] Japanese Patent Publication No. 2004-136838 [Patent Document 6] Japanese Patent Publication No. 2010-262889

Summary of the Invention

Problems to be Solved by the Invention

[0010] It is desirable that such a display device has a simple structure and can display a desired pattern. Furthermore, by displaying marks such as arrows, it is possible to convey the intention of action to the surroundings, leading to an improvement in safety against automobile accidents. For example, in the technologies disclosed in Patent Document 1 and Patent Document 2, only a light source and a reflector are used to display a mark on the road surface to prompt attention to other vehicles or the like. According to these technologies, simple marks such as circles, ellipses, and quadrilaterals can be displayed, but it is difficult to display complex marks such as arrows. Therefore, for example, when mounted on a vehicle and used, the planned traveling direction cannot be displayed.

[0011] In the technology disclosed in Patent Document 3, different shaped drawing patterns are drawn on the road surface or the like by switching a diffraction grating portion or switching a semiconductor light emitting element to be lit. This configuration also makes it difficult to display complex marks. In addition, a complex mechanism and complex control are required. Furthermore, when realized by switching a semiconductor light emitting element to emit light, a large number of semiconductor light emitting elements are required.

[0012] In Patent Document 4, a technology using a laser drawing device for drawing marks is disclosed. In the technology disclosed in Patent Document 4, it is possible to display complex marks, but a complex mechanism is required to operate the head that irradiates the laser, and the wear of the sliding portion is also severe.

[0013] In Patent Document 5, a technology using a liquid crystal projector for drawing marks is disclosed. In a liquid crystal projector, a secondary image in the form of a desired mark is formed on the liquid crystal valve by a light source and a liquid crystal valve. A light source is created, and the secondary light source is projected by an optical system to draw a mark on the road surface. In this technology, display of complex marks is possible. However, the liquid crystal valve has a low light transmittance, and furthermore, in the liquid crystal valve, by blocking the light in the areas other than the mark in the liquid crystal valve, the secondary light source of the desired mark is created, resulting in further poor light utilization efficiency. Also, in addition to the light source and the liquid crystal valve, a plurality of optical systems such as a forward light generation optical system and a projection optical system are required, leading to a complex structure. Note that instead of the liquid crystal valve, a DMD (Digital Micromirror Device) or a metal mask in the shape of the mark can be used to create the secondary light source. However, in these cases as well, there is no change in blocking the light in the areas other than the mark, the light utilization efficiency is poor, and an optical system for guiding the light from the light source to the DMD or the metal mask and furthermore a projection optical system are required, inevitably resulting in a complex structure.

[0014] In the technology disclosed in Patent Document 6, since a plurality of light emitting diodes are required, the cost increases. Also, in order to control the plurality of light emitting diodes, a complex mechanism and control are required. Moreover, the resolution of the mark is poor because one mark is displayed by a plurality of light emitting diodes.

[0015] As other technologies, for example, there is a technology for creating a light source according to the shape of a desired mark in order to display the mark. However, when creating a light source according to the shape of the mark, the cost increases.

[0016] The present invention has been made in view of the above circumstances, and aims to display a complex pattern with good light utilization efficiency, at low cost, and with a simple configuration.

Means for Solving the Problems

[0017] <00001xx> The present invention relates to a vehicle-mounted direction-of-travel display device, comprising: an optical device that displays a light-gathering mark indicating the direction of travel of the vehicle around the vehicle; and a lighting controller that controls the illumination or flashing of the optical device, wherein the lighting controller acquires a detection signal from a state detection device mounted on the vehicle that detects at least one of the vehicle's behavior and environmental information around the vehicle, and illuminates or flashes the optical device based on the detection signal, and the optical device displays a plurality of light-gathering marks.

[0018] Furthermore, in the direction of travel display device of the present invention, the color of the multiple light-gathering marks may differ from that of adjacent light-gathering marks that are displayed consecutively. [Effects of the Invention]

[0019] According to the present invention, it is possible to express complex patterns with good light utilization efficiency, low cost, and a simple configuration. This can be demonstrated. Furthermore, issues, configurations, and effects other than those mentioned above will be clarified by the following description of the embodiments. To be made softer. [Brief explanation of the drawing]

[0020] [Figure 1] (a) is an explanatory diagram illustrating an example of use of the optical device according to the first embodiment, and (b) is an enlarged view of part B of (a). [Figure 2] (a) is a diagram showing the configuration of the optical device according to the first embodiment, and (b) is a cross-sectional view taken along line A-A' in (a). [Figure 3] This is an explanatory diagram illustrating the coordinate system used to describe the configuration of the optical device of the first embodiment. [Figure 4] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflective surface of the reflector of the first embodiment and the light source. [Figure 5] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector in the first embodiment. [Figure 6]This is the point sequence data for the effective region of the second region of the reflective surface of the reflector in the first embodiment. [Figure 7] (a) is a figure showing the simulation results of the illumination image from the first region of the reflecting surface of the reflector of the first embodiment, (b) is a figure showing the simulation results of the illumination image from the second region of the reflecting surface of the reflector of the first embodiment, and (c) is a figure showing the simulation results of the illumination image from the reflecting surface of the reflector of the first embodiment. [Figure 8] (a) is a diagram showing the configuration of the optical device according to the second embodiment, and (b) is a cross-sectional view of (a) taken along line A-A'. [Figure 9] This is an explanatory diagram illustrating the coordinate system used to describe the configuration of the optical device in the second embodiment. [Figure 10] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the lens emission surface of the second embodiment and the light source. [Figure 11] This is the point sequence data for the effective area of ​​the first region of the emission surface of the lens in the second embodiment. [Figure 12] This is the point sequence data for the effective region of the second region of the emission surface of the lens in the second embodiment. [Figure 13] (a) is a figure showing the simulation results of the illumination image from the first region of the lens exit surface of the second embodiment, (b) is a figure showing the simulation results of the illumination image from the second region of the lens exit surface of the second embodiment, and (c) is a figure showing the simulation results of the illumination image from the lens exit surface of the second embodiment. [Figure 14] (a) is an explanatory diagram illustrating the outline of the planned direction of travel display by the direction of travel display device of the third embodiment, and (b) is a table showing the arrangement position and display content of each optical device. [Figure 15] This is a configuration diagram of the control system for the direction of travel display device of the third embodiment. [Figure 16] This is an explanatory diagram illustrating an example of a blind spot in the third embodiment. [Figure 17] This is a functional block diagram of the lighting controller of the third embodiment. [Figure 18] This is a flowchart of the lighting control process by the lighting controller in the third embodiment. [Figure 19] This figure shows the simulation results of the illumination image produced by the first forward-moving optical device in the third embodiment. [Figure 20] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflector of the second forward optical device of the third embodiment and the light source. [Figure 21] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector of the second forward optical device of the third embodiment. [Figure 22] This is the point sequence data for the effective region of the second region of the reflective surface of the reflector of the second forward optical device of the third embodiment. [Figure 23] This figure shows the simulation results of the illumination image produced by the second forward-moving optical device of the third embodiment. [Figure 24] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflector surface of the reflector of the first right-turn optical device of the third embodiment and the light source. [Figure 25] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector of the first right-turn optical device in the third embodiment. [Figure 26] This is the point sequence data for the effective area of ​​the second region of the reflective surface of the reflector of the first right-turn optical device in the third embodiment. [Figure 27] (a) is a figure showing the simulation results of the illumination image produced by the first right-turn optical device of the third embodiment, and (b) is a figure showing the simulation results of the illumination image produced by the second right-turn optical device of the third embodiment. [Figure 28] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflector surface of the reflector of the second right-turn optical device of the third embodiment and the light source. [Figure 29] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector of the second right-turn optical device in the third embodiment. [Figure 30]This is the point sequence data for the effective area of ​​the second region of the reflective surface of the reflector of the second right-turn optical device in the third embodiment. [Figure 31] (a) to (f) are simulation results of display examples using the direction of travel display device of the third embodiment. [Figure 32] This is an explanatory diagram illustrating the coordinate system used to describe the configuration of the optical device in Modification Example 1. [Figure 33] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflector's reflective surface and the light source in Modification Example 1. [Figure 34] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector in Modification 1. [Figure 35] This is the point sequence data for the effective area of ​​the second region of the reflecting surface of the reflector in Modification 4. [Figure 36] This is the point sequence data for the effective area of ​​the third region of the reflecting surface of the reflector in Modification 1. [Figure 37] (a) is a figure showing the simulation result of the illumination image from the first region of the reflecting surface of the reflector of Modified Example 1, (b) is a figure showing the simulation result of the illumination image from the second region of the reflecting surface of the reflector of Modified Example 1, (c) is a figure showing the simulation result of the illumination image from the third region of the reflecting surface of the reflector of Modified Example 1, and (d) is a figure showing the simulation result of the illumination image from the reflecting surface of the reflector of Modified Example 1. [Figure 38] (a) to (d) are explanatory diagrams illustrating the positional relationship between the effective area of ​​the reflector's reflective surface and the light source in Modification Example 2. [Figure 39] This is the point sequence data for the effective area of ​​the first region of the reflective surface of the reflector in modified example 2. [Figure 40] This is the point sequence data for the effective area of ​​the second region of the reflecting surface of the reflector in modified example 2. [Figure 41] These figures show the simulation results of the illumination image produced by the reflective surface of the reflector in Modification Example 2. [Modes for carrying out the invention]

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the diagrams, the same parts are generally denoted by the same reference numerals, and repeated explanations are omitted. To be omitted. On the other hand, when describing parts that are labeled with symbols in one figure, in the description of other figures... Although they are not shown again in the illustration, they may be referred to using the same symbols.

[0022] <First Embodiment> The optical apparatus of the first embodiment of the present invention will be described. Figures 1(a) and 1(b) show the optical apparatus of the present invention. An example of the use of the optical device 100 in this embodiment is shown. Figure 1(a) shows the optical device 100 of this embodiment. This is a perspective view of the mounted vehicle 200, and Figure 1(b) shows the area enclosed by the dashed line in Figure 1(a). This is a magnified view of B.

[0023] As shown in Figures 1(a) and 1(b), the optical device 100 of this embodiment is, for example, Mounted on vehicle 200, it is launched from a predetermined height onto the surrounding road surface 300, such as in front of vehicle 200. An illumination image (focusing pattern, focusing mark) 400 is formed. Note that the optical device 1 of this embodiment 00 is not limited to in-vehicle applications.

[0024] [Optical device] Figures 2(a) and 2(b) are configuration diagrams of the optical device 100 of this embodiment. Figure 2(b) is a front view of the optical device 100 of this embodiment, and Figure 2(a) is a front view of Figure 2(a) - A' is a cross-sectional view.

[0025] Here, as shown in the diagram, the left-right direction in Figure 2(a) is the left-right direction, and the up-down direction in the diagram is the right-down direction. In Figure 2(b), the vertical direction is described as the front-back direction, the left-right direction as the front-back direction, and the vertical direction as the vertical direction. These correspond to upward (Up), downward (Dw), forward (Fr), backward (Bk), and left (Le), respectively. It is called the right side (Ri).

[0026] The optical device 100 of this embodiment includes a substrate 111, a light source (LED) 110, and a reflector. 120, support member 130, cover 140, body 150, lighting control circuit 160 It is equipped with ,

[0027] The body 150 has an opening at the front, for example, a box shape. Cover 140 It has light-transmitting properties and is provided to close the opening of the body 150. The light reflected by the kuta 120 is emitted outside the optical device 100 through the cover 140. .

[0028] Light source 110, for example, uses an LED (Light Emitting Diode). It is mounted on a substrate 111 which is placed on a support member 130. The light source 110 has The light source is not limited to LEDs. For example, organic EL (Electroluminescent) It may be an inorganic EL, a laser, or a light bulb. The substrate 111 is, for example, a support member It is positioned approximately in the center of the 130 in the left-right direction, near the front tip.

[0029] The reflector 120 directs the light emitted from the light source 110, which is positioned at a predetermined location, to a predetermined surface. This is an optical element that focuses light onto a specific area on the irradiated surface, forming an irradiated image on that surface. The illumination surface is, for example, as shown in Figure 1(b), when the optical device 100 is mounted on the vehicle 200. In this case, the road surface 300 is the surrounding area such as in front of the vehicle 200, and the resulting illuminated image 400 is particularly It has a specific intention, for example, a shape that indicates the intended direction of travel.

[0030] The reflector 120 is a deflection surface that focuses the light emitted from the light source 110. It has a reflective surface 121 (on surface). Reflector 120's reflective surface 121 It is divided into multiple regions. Each of the divided regions (divided regions) is the irradiation surface. Different partial irradiation images are formed on top. The irradiation image 400 is formed by combining each of the partial irradiation images. Each divided region has an aspherical or freeform surface shape.

[0031] The shape of the reflective surface 121 of the reflector 120 is determined by the required illumination image 400 and illuminance distribution. The position of the light source 110 and the shape of the reflective surface 121 of the reflector 120 are determined accordingly. The details of the relationship between the region that forms the irradiation image on the irradiation surface and the other factors will be described later.

[0032] Reflectors are made from materials such as resin, glass, or metal. Reflection of reflector 120 For example, an aluminum film is deposited on surface 121. A reflective coating may also be applied.

[0033] The reflector 120 is fixed to the support member 130, for example, with fixing screws 131 or the like. At this time, it is positioned above the light source 110 and within the range of the light source 110's beam angle. For example, the position relative to the light source 110 may be fixed by a positioning pin 132 or the like.

[0034] The lighting control circuit 160 controls the lighting of the light source 110. For example, the lighting control circuit 160 controls the lighting of the light source 110. The system receives control signals from an external source and controls the illumination of the light source 110 according to those control signals.

[0035] Furthermore, the lighting control circuit 160 is itself a CPU (Central Processing Unit). Unit), RAM (Random Access Memory), ROM (Rea It has a (Only Memory) and the CPU loads programs that are pre-stored in ROM. The lighting of the light source 110 may be controlled by loading it into memory and executing it.

[0036] The support member 130 is fixed to the surface of the box-shaped body 150 facing the cover 140 with screws. It is supported by 131, etc. The support member 130 is made of metal, for example. Cooling fins may be provided on 130. Note that the support member 130 is an aiming screw - It may be supported by a mechanism that allows the position and angle of the reflector 120 to be adjusted.

[0037] Light source 110, reflector 120, substrate 111, support member 130, and lighting control circuit 16 0 is located in a lamp chamber 151 formed inside the body 150 and the cover 140.

[0038] [Details of the reflector shape] Next, the shape of the effective area of ​​the reflective surface 121 of the reflector 120 in this embodiment and the light source 110 An example of the relationship between this and the irradiation image 400 displayed on the irradiation surface 301 will be explained.

[0039] In this embodiment, the local coordinate system 911(x', y', z') shown in Figure 3 is set. Hereafter, we will simply refer to this as coordinate system 911.

[0040] In coordinate system 911, the direction perpendicular to the illumination surface 301 is defined as the y' axis direction. Let the coordinate value of 1 in the y' axis direction be -600 mm. That is, from the illumination surface 301 on the y' axis Let the origin O be at a position of 600 mm.

[0041] Furthermore, on a plane including the y' axis and the center of the light emission region of the light source 110, parallel to the illumination surface 301 Let the direction be the z' axis direction. Let the direction perpendicular to the y'-z' plane be the x' axis direction.

[0042] Here, the light source 110 has, for example, light-emitting regions in the x' axis direction and the z' axis direction respectively 1.15mm LED (for example, nichia NCSW170C / NCSA170C) ) is used. Also, the irradiation image 400 is displayed in the pattern display area 401 on the irradiation surface 301 as For example, the shape of the reflective surface 121 when forming an arrowhead shape. The following will be explained. Note that the pattern display area 401 is on the illumination surface 301 in the z' axis direction. Within the range of 1500mm to 2000mm, and within the range of -500mm to 500mm in the x' axis direction. ru.

[0043] Figures 4(a) to 4(d) show the effective area of ​​the reflective surface 121 of the reflector 120 and This is a diagram showing the positional relationship of the light source 110. Figure 4(a) is an oblique view, and Figure 4(b) is a z'- Figure 4(c) is the y' plane view, Figure 4(d) is the x'-y' plane view, and Figure 4(d) is the x'-z' plane view. .

[0044] In this coordinate system 911, the light source 110 has the coordinates of the center of the light-emitting area as (0, -7.5, 20 ), they are positioned so that the central axis of the beam angle is aligned with the y' axis.

[0045] Furthermore, as shown in Figure 4(c), the reflective surfaces 121 of the reflector 120 are different. It comprises a first region 121a having a free-form surface shape and a second region 121b. 21a and the second region 121b are the reflective surface 121 of the reflector 120 in coordinate system 911. This is a division by a plane passing through the origin and parallel to the z'-y' plane. The region on the left side of the diagram is The first region is 121a, and the region to the right is the second region, 121b.

[0046] The first region 121a is the pattern display region 401, where the x' coordinate is from -500 mm to 0 A first irradiation image, which is a partial irradiation image, is formed in the mm region. In addition, the second region 121b is x A second irradiation image, which is a partial irradiation image, is formed in the region from 0 mm to 500 mm in coordinates.

[0047] The free surfaces of the first region 121a and the second region 121b are, for example, different fifth-order surfaces. and 5th order NURBS (Non-Uniform Rational B-Splin e) It is a curved surface. This freeform surface shape is formed when light from the light source 110 is reflected in the first region 121a. The first irradiation image on the irradiation surface 301 obtained by this process, and the image obtained by reflection in the second region 121b When combined with the second irradiation image on the irradiation surface 301, an arrowhead shape is displayed on the irradiation surface 301. It is formed in such a way. Note that free surfaces are not limited to 5th-order and 5th-order NURBS surfaces, A free-form surface suitable for displaying the desired focusing mark (illuminated image) is selected.

[0048] The free surface shapes of the first region 121a and the second region 121b are as follows: The point sequence data is shown in Table 511 in Figure 5 and Table 512 in Figure 6. Here, the point sequence data As such, the direction cosines (l', m', n) of each position (x', y', z') in coordinate system 911 are This indicates ').

[0049] Furthermore, as shown in Figures 5 and 6, the boundary region of the first region 121a and the second region 121b At each point, the values ​​of the direction cosines of the first region 121a and the second region 121b are, , different. For example, the direction cosine at (0, 0, -0.00898) is in the first region 121 In a, the values ​​are (-0.04226, -0.33936, -0.939708), and the second region In region 121b, the values ​​are (-0.042256, -0.33936, 0.939708). That is, the first region 121a and the second region 121b are discontinuous. Therefore, the first Region 121a and the second region 121b have different freeform surface shapes.

[0050] Here, the ray tracing of the illuminance distribution on the irradiation surface 301 obtained by the optical device 100 with the above specifications is performed. The simulation results are shown in Figures 7(a) to 7(c). Here, the light source 110 is as described above. Among LEDs with an emitting region, we used the nichia NCDW170C (350lm). Ta.

[0051] Figure 7(a) shows the light emitted from the light source 110, which was reflected by the first region 121a. This shows the illuminance distribution (first illumination image) 411a of the pattern display area 401 on the illumination surface 301. Figure 7(b) shows the pattern on the illuminated surface 301 obtained by reflection in the second region 121b. The illuminance distribution (second illumination image) 411b of region 401 is shown. Also, in Figure 7(c), the first region The illuminance distribution (illumination image; focusing marks) 411 by 121a and the second region 121b is shown.

[0052] As shown in Figure 7(c), according to the optical device 100 of this embodiment, the light on the irradiation surface 301 The turn display area 401 can display an arrowhead pattern (focusing mark 411). ru.

[0053] As described above, according to this embodiment, the reflective surface 121 has multiple different free-form surface shapes. A reflector 120 having a region and a light source form a shape that indicates direction. An arrowhead pattern can be formed on the desired illumination surface. That is, light sources arranged in the shape of a focusing mark. There is no need to control the lighting using arrays or to use multiple optical systems. Therefore, An optical device can be realized with a simple structure that can form a shape indicating a specific intention on a desired surface.

[0054] Furthermore, according to this embodiment, a shape indicating a specific intention is represented on the reflective surface 12 of the reflector 120. This is achieved by shape 1. In other words, no mask or the like is used to form the irradiation image. So, the total luminous flux reaching the reflector 120 from the light source 110 is used to form the illuminated image 400. Therefore, it is possible to realize an optical device with good light utilization efficiency and, as a result, high energy-saving effect. .

[0055] <Second Embodiment> [Optical device] A second embodiment of the optical apparatus of the present invention will be described. Figures 8(a) and 8(b) show the actual apparatus. This is a diagram of the configuration of the optical device 101 in this embodiment. Figure 8(a) shows the configuration of the optical device 101 in this embodiment. This is a front view, and Figure 8(b) is a cross-sectional view taken along line A-A' in Figure 8(a).

[0056] In this embodiment as well, the optical device 101 is, for example, connected to a vehicle 200, similar to the first embodiment. Mounted on the vehicle, it projects an image 40 onto the surrounding road surface 300, etc., in front of the vehicle 200, from a predetermined height. It forms a zero. Note that the optical device 101 of this embodiment is not limited to being mounted in a vehicle.

[0057] In the following description of the optical device 101 of this embodiment, the optical device 100 of the first embodiment The same configuration will be given the same symbols, and further explanation will be omitted.

[0058] As shown in this figure, the optical device 101 of this embodiment includes a substrate 111, a light source 110, and Lens 170, support member 130, cover 140, body 150, and lighting control circuit 16 It includes 0 and .

[0059] The light source 110 is mounted on a substrate 111 which is placed on a support member 130. 11 is positioned approximately in the center of the support member 130 in the vertical and horizontal directions. The support member 130 is Within the lamp chamber 151, for example, parallel to the surface on the side facing the opening of the body 150, space 15 Open section 2, and it will be supported by fixing screws 131, etc.

[0060] The lighting control circuit 160 is, for example, located within space 152.

[0061] The lens 170 directs the light emitted from the light source 110 to a predetermined pattern on the illumination surface 302. This is an optical element that focuses light onto the display area 402 to form the illuminated image 400. The lens 170 is, for example, For example, transparent resins such as acrylic, polycarbonate, and polyolefin, or transparent glass. It is formed by the above. The incident surface 172 and the exit surface 171 of the lens 170 have an anti-reflective coating. It is also used in coatings.

[0062] The lens 170 is positioned in front of the light source 110, and the light emitted from the light source 110 is directed through the lens. The material is injected from the injection surface 172 and ejected from the ejection surface 171. At least one of the emitting surfaces 171 is formed as a deflection surface that focuses the light emitted from the light source 110. The deflection surface of lens 170 is divided into multiple regions. Each of the divided regions forms a different partial irradiation image on the irradiation surface 302. The irradiation image 400 is The images are formed by combining the partial illumination images. Each divided region has an aspherical or free-form surface shape. To possess.

[0063] The shape of the deflection surface of lens 170 is determined according to the required illumination image 400 and illuminance distribution. The position of the light source 110, the shape of the deflection surface of the lens 170, and the position of the light source 110, the shape of the deflection surface of the lens 170, and the position of the light source 110, the shape of the deflection surface of the lens 170, and the shape The details of the relationship with the turn display area 401 will be described later.

[0064] The lens 170 is fixed to the support member 130, for example, with fixing screws (not shown). At this time, the lens 170 is positioned such that its deflection surface is within the range of the directional angle of the light source 110. It can be done.

[0065] The light source 110, lens 170, substrate 111, support member 130 and lighting control circuit 160 are It is positioned within a lamp chamber 151 formed inside the body 150 and the cover 140.

[0066] [Details of lens shape] Next, the shape of the effective area of ​​the light-gathering surface of the lens 170 in this embodiment, the light source 110, and the illumination surface An example of the relationship between the illumination image 400 displayed on 302 and the emission surface 171 is explained. Let's take the example of a case where the deflection surface has a free-form shape and the incident surface 172 is a flat surface. To clarify, in this example, the lens 170 is made of polycarbonate. Yes, they are.

[0067] In this embodiment, the local coordinate system 912(x'', y'', z'', as shown in Figure 9 is set. Hereafter, we will simply refer to this as coordinate system 912.

[0068] In coordinate system 912, the distance from point Rn on the illumination surface 302 is 600m in the direction perpendicular to the illumination surface 302. An origin O is defined at a point m away. From the origin O, a point on the illumination surface 302 is located at a distance of 2 from Rn. The direction toward point Rz at 000mm is defined as the z'' axis direction.

[0069] On a plane perpendicular to the z-axis, the x-axis direction is defined as the direction passing through the origin O and parallel to the irradiation surface 302. The direction perpendicular to the x"-z" plane is defined as the y" axis direction.

[0070] Here, the light source 110 has, for example, light-emitting regions in the x" axis direction and the y" axis direction respectively 1.15mm LED (for example, nichia NCSW170C / NCSA170C) ) is used. Also, the pattern display area 402 on the irradiation surface 302 is set as the irradiation image 400. For example, the shape of the exit surface 171 when forming an arrowhead shape. The following will be explained. Note that the pattern display area 402 is on the illuminated surface 302, from Rn to Rz In the direction toward, the range is 1500mm to 2000mm, and in the x' axis direction, the range is -500mm to 500 It is in the range of mm.

[0071] Figures 10(a) to 10(d) show the effective area of ​​the emission surface 171 of the lens 170 and This is a diagram showing the positional relationship of the light source 110. Figure 10(a) is an oblique view, and Figure 10(b) is a z Figure 10(c) is the "-y" plane view, Figure 10(d) is the x"-y" plane view, and Figure 10(d) is the x"-z" plane view. This is a diagram.

[0072] In this coordinate system 912, the light source 110 has the coordinates of the center of the light-emitting region as (0, 0, -20), The beam angle is positioned so that the central axis direction is aligned with the z-axis direction.

[0073] The emission surface 171 of the lens 170 in this embodiment is, as shown in Figure 10(c), the first region 1 It comprises 71a and a second region 171b. The first region 171a and the second region 171b are The emission surface 171 is divided by a plane that passes through the center of the light-emitting region of the light source 110 and is parallel to the z"-y" plane. In the diagram, the area on the left is the first region 171a, and the area on the right is the second region 17 It is 1b.

[0074] The first region 171a is the pattern display region 402, where the x" coordinate is from -500 mm to 0 In the mm region, a first irradiation image, which is a partial irradiation image, is formed. In the second region 171b, A second irradiation image, which is a partial irradiation image, is formed in the region from 0 mm to 500 mm in x-coordinate.

[0075] The free surfaces of the first region 171a and the second region 171b are, for example, different fifth-order surfaces. and 5th order NURBS (Non-Uniform Rational B-Splin e) It is a curved surface. This freeform surface shape is such that light from the light source 110 is refracted in the first region 171a. The first irradiation image on the irradiation surface 302 obtained by this process, and the image obtained by reflection in the second region 171b The combination of the second irradiation image on the irradiation surface 302 results in an arrowhead shape being projected onto the irradiation surface 302. It is formed in such a way. Note that free surfaces are not limited to 5th-order and 5th-order NURBS surfaces, A free-form surface suitable for displaying the beam's focusing mark (illuminated image) is selected.

[0076] The free surface shapes of the first region 171a and the second region 171b are as follows: The data for the sequence of points is shown in Table 521 in Figure 11 and Table 522 in Figure 12. Here, the data for the sequence of points As the data, the direction cosines (l'', m'') of each position (x'', y'', z'') in coordinate system 912. This indicates n).

[0077] Furthermore, as shown in Figures 11 and 12, the boundary between the first region 171a and the second region 171b At each point in the region, the direction cosines of the first region 171a and the second region 171b are They are different. For example, the direction cosine at (0, -10, 6.021816) is the first region. In region 171a, the values ​​are (0.069813, -0.55406, 0.829546), In the second region 171b, (-0.06981, -0.55406, 0.829546) Yes, that is, the first region 171a and the second region 171b are discontinuous. Therefore, The first region 121a and the second region 121b have different freeform surface shapes.

[0078] As mentioned above, the incident surface 172 is a flat surface, and the effective region is the four vertices (-10, -10, The four bounded by 0), (-10, 10, 0), (10, 10, 0), and (10, -10, 0) It is a rectangular plane.

[0079] Here, the ray tracing of the illuminance distribution on the illumination surface 302 obtained by the optical device 101 with the above specifications... The simulation results are shown in Figures 13(a) to 13(c). Here, the light source 110 is Here, the light source 110 is an LED having the above-mentioned light-emitting region, specifically a nichia NCDW A 170C (350lm) lamp was used. Note that the vertical axis in Figures 13(a) to 13(c) represents the irradiation surface 3 This is the distance from Rn on 02 in the direction from Rn to Rz (the z''' axis).

[0080] Figure 13(a) shows the light emitted from the light source 110 refracted in the first region 171a. This shows the illuminance distribution (first illumination image) 412a of the pattern display area 402 on the illumination surface 302. Figure 13(b) shows the pattern on the illuminated surface 302 obtained by refraction in the second region 171b. Figure 13(c) shows the illuminance distribution (second illumination image) 412b in the indicated area 402. Also, Figure 13(c) shows the first area The illuminance distribution (concentration marks) 412 for region 171a and the second region 171b is shown.

[0081] As shown in Figure 13(c), according to the optical device 101 of this embodiment, on the irradiation surface 302 The arrowhead pattern (focusing mark 412) can be displayed in the pattern display area 402. Cut.

[0082] As explained above, according to this embodiment, similar to the first embodiment, the deflection surface (exit surface 17 1) A lens 170 having multiple regions of different free-form surface shapes, and a light source Therefore, an arrowhead pattern, which indicates direction, can be formed on the desired irradiation surface 302. Furthermore, the lighting is controlled using a light source array arranged in the shape of a focusing mark, or by using multiple optical systems. There is no need to use it. Therefore, with a simple structure, a shape that indicates a specific intention can be formed on the desired surface. It is possible to realize optical devices that can achieve this.

[0083] Furthermore, according to this embodiment, the shape indicating a specific intention is the deflection surface (emission surface) of the lens 170. This is achieved by the shape of 171). In other words, the irradiation image is not formed using a mask or the like. Therefore, the total luminous flux reaching the lens 170 from the light source 110 is used to form the illuminated image 400. Yes, it is possible. Therefore, it is possible to realize an optical device with good light utilization efficiency and, as a result, high energy-saving effect. ru.

[0084] In this embodiment, the shape of the exit surface 171 of the lens 170 is a free-form surface shape. The example given was that of a deflection surface, but it is not limited to this. Deflection having the above functions The surface may be realized by the incident surface 172 of the lens 170, or by the incident surface 172 and the exit surface 17 This can also be implemented using both sides of 1.

[0085] <Third Embodiment> Next, a third embodiment of this embodiment will be described. In this embodiment, the light of each embodiment described above The learning device 100 or 101 is mounted on the vehicle 200, and in front of the vehicle 200 according to the planned direction of travel. A light-gathering mark 400 indicating the intended direction of travel of the vehicle 200 is displayed on the road surface 300 surrounding the vehicle. In this embodiment, the optical device 100 is used to project the road surface 300 in front of the vehicle 200. Let's explain using the example of displaying the 400 focusing mark.

[0086] [Direction display device] Figures 14(a) and 14(b) show the direction of travel indicated by the travel direction display device 600 of this embodiment. This is a diagram illustrating the outline of the planned direction indicator.

[0087] As shown in this figure, the direction of travel display device 600 of this embodiment is located at the front of the vehicle 200. It is equipped with two optical devices 100.

[0088] The six optical devices 100 are located, for example, in the front center of the vehicle 200, as shown in Figure 14(a). Two are mounted on the front left side and two on the front right side. Optical device 100 of this embodiment For example, it is embedded in the bumper or other parts attached to the front of the vehicle.

[0089] In the following cases where distinction is necessary, the two optical devices 100 mounted in the center of the front of the vehicle will be referred to as follows: Together, they are forward-moving optical devices 100F, the first forward-moving optical device 100Fa, and the second forward-moving optical device 100Fa. The advance optical device 100Fb, consisting of two optical devices 100 mounted on the left front side of the vehicle, is combined into one unit. , left-turn optical device 100L, first left-turn optical device 100La, second left-turn optical Device 100Lb, two optical devices 100 mounted on the front right side of the vehicle, together for right turns Optical device 100R, first right-turn optical device 100Ra, second right-turn optical device 10 These are called 0Rb, respectively.

[0090] The first forward optical device 100Fa controls the forward pattern 430a, and the second forward optical device 10 0Fb is forward pattern 430b, and the first left-turn optical device 100La is left-turn pattern 4 40a is the second left-turn optical device 100Lb, the left-turn pattern 440b is the first right-turn optical Device 100Ra is for right turn pattern 450a, and the second right turn optical device 100Rb is for right turn pattern Turn 450b will be displayed on the track surface at 300 as a light-gathering mark 400.

[0091] As shown in Figure 14(a), there is an optical device 100F for forward movement, an optical device 100L for left turns, and an optical device 100L for right turns. Of the focusing marks illuminated by the optical device 100R, the focusing marks furthest from the vehicle 200 (front The colors of the forward turn pattern (430a), left turn pattern (440a), and right turn pattern (450a) are close to the vehicle. Focusing light mark (forward pattern 430b, left turn pattern 440b, right turn pattern 450b) The color changes. In other words, the vehicle equipped with 6 optical devices 100 is far from the focusing marker. Set the color of the focusing mark, which is close to the "K" mark, to be different.

[0092] Furthermore, left-turn patterns 440a and 440b refer to the lane in which vehicle 200 is located and the vehicle perpendicular to it. Arrange them so that they are aligned in the direction of travel of the vehicles on the line. Similarly, right turn patterns 450a and 4 50b is also aligned in the direction of travel of vehicles in the lane perpendicular to the lane in which vehicle 200 is located. Arrange them accordingly.

[0093] The installation position of each optical device 100, and the shape, color, and display position of each focusing mark 400 are detailed in the diagram. This is shown in Table 531 of 14(b). Note that the reflector 120 that achieves each light-gathering mark 400 Details of the shape will be described later.

[0094] Figure 15 is a diagram showing the control system of the direction of travel display device 600 in this embodiment. As such, the direction of travel display device 600 includes six optical devices 100 and a lighting controller 610. It is equipped with the following.

[0095] The lighting controller 610 instructs the lighting control circuit 160 of the optical device 100 to turn on the lights. A signal will be transmitted. The lighting controller 610 will output a signal that serves as the basis for calculating the control signal. Various status detection devices are connected.

[0096] The status detection device detects the behavior of the vehicle 200 and environmental information around the vehicle 200, and controls the lighting control The detection result is output to the Trolla 610 as a detection signal. In this embodiment, the state detection device and For example, the turn signal switch 601, road surface analysis device 602, vehicle speed sensor 603, position The position information acquisition device 604, etc., is connected. Others include the steering sensor and the reverse gear sensor. The following may be connected.

[0097] The turn signal switch 601 receives an operation signal (direction signal) when the turn signal is activated. The signal (indicating direction) is output to the lighting controller 610. The direction indicator signal also includes information about the direction to be indicated. Born.

[0098] The road surface analysis device 602 analyzes the condition of the road surface 300 and outputs the results to the lighting controller 61 Output to 0. In this embodiment, for example, a light source, a polarizing camera, and light from the light source onto the road surface. It includes an analysis unit that analyzes images acquired by a polarizing camera of the irradiated state. For example, a signal (road signal) that identifies the condition of the road surface 300 is used by the lighting controller 610. Output to: In this embodiment, the road surface signal indicates dry, wet, and frozen. Information that can identify the condition of the road surface 300 includes, for example, the reflectivity of the road surface 300. .

[0099] The vehicle speed sensor 603 detects the vehicle's speed and uses the vehicle speed signal to control the lighting controller. Output to roller 610. For example, generate a pulse signal proportional to the rotation speed of the axle, and pulse Vehicle speed is detected according to the number of S signals.

[0100] The location information acquisition device 604 outputs the vehicle's current location information and nearby map information. The position information acquisition device 604 acquires information from, for example, navigation satellites such as GPS and the vehicle speed sensor 603. The system uses the information to calculate the vehicle's current position. Map information is stored in advance. For example, a navigation device may be used as the acquisition device 604.

[0101] The lighting controller 610 is a CAN (Controller Area Network) controller. (work) Various status detection devices are used via multiplex communication lines such as communication lines, serial communication lines, wireless communication networks, etc. It may also be connected to a stand.

[0102] The lighting controller 610 controls six optical devices in response to signals from each of the above-mentioned state detection devices. Each of the 100 lights, either lit or flashing, is controlled independently.

[0103] The lighting controller 610 includes a CPU 611, RAM 612, ROM 613, and input / output It is equipped with a power interface (I / O) 614. These are connected by an internal bus. .

[0104] Some or all of the functions implemented by the lighting controller 610 are performed by the CPU 611 in ROM. The program (software) stored in 613 is loaded into RAM 612 and executed. This is achieved by [details omitted]. Furthermore, some or all of each function is implemented using LSI (Large Scale). ale Integration), ASIC (Application Specification) Even if implemented by hardware such as an integrated circuit (IC) Good. It may also be implemented through a combination of software and hardware. The necessary information and data are stored in ROM613 and RAM612.

[0105] In this embodiment, the direction of travel display device 600 illuminates or extinguishes the optical device 100 depending on the vehicle speed. The system controls the illumination of the optical device 100 according to the road surface conditions 300. Furthermore, the optical device 100 to be illuminated is determined by the planned direction of travel of the vehicle 200.

[0106] Specifically, the optical device 100 is illuminated when the vehicle 200 is stopped or moving slowly. Normally, forward patterns 430a and 430b are displayed. However, the direction indicator signal... When this signal is received, the pattern of the direction specified by the direction indicator signal (left turn pattern 440a, The optical device 100 that displays 440b or right-turn pattern 450a, 450b) is illuminated. ru.

[0107] On the other hand, the illuminance of the optical device 100 is changed according to the condition of the road surface 300. For example, the road surface The reflectivity of 300 is high, and if a light-gathering mark of 400 is displayed on the road surface of 300, other vehicle drivers will see If the lights are causing dazzling effects, turn them off or reduce their brightness.

[0108] If the amount of luminous flux from the light source 110 can be controlled, the illuminance is determined according to the reflectance of the luminous flux from the light source 110. It is reduced by changing the current value. The amount of luminous flux can be changed, for example, by controlling the current value. To convert to pulse width modulation (PWM). It may also be changed using ions. Dimming using pulse width modulation is performed by changing the light source 110 to PWM By flashing rapidly at a frequency invisible to the human eye in synchronization with the signal, the illumination of the Focusing Mark 400 is achieved. This is a method to reduce the duty cycle. In this case, the ratio of the time the light is on within one cycle is the duty cycle. By reducing the ratio, the illuminance of the focusing Mark 400 can be further reduced.

[0109] For example, the optical device 100 may be made to flash in synchronization with the flashing of the turn signal. In this case, the flashing control of the light source 110 at a frequency invisible to the human eye is repeated at the flashing frequency of the turn signal. By repeating the process, it is possible to display the flashing of the focusing mark 400 even when the illuminance is reduced. be.

[0110] Furthermore, the lighting controller 610 of this embodiment is designed to detect when its own vehicle is dead to another vehicle's driver. The forward-moving optical device 100F may be illuminated only when it is located in a corner position. i. Blind spots are, for example, intersections, T-junctions, etc., as shown in Figure 16.

[0111] We will explain this by giving an example of how these controls are implemented. Figure 17 shows the lighting control of this embodiment. This is a functional block diagram of the Torola. The lighting controller 610 of this embodiment is shown in Figure 17. To that end, it comprises an illumination determination unit 621, a direction determination unit 622, and a vehicle position determination unit 623. ru.

[0112] The illuminance determination unit 621 determines whether or not to light up the optical device 100, and if so, the illuminance The degree is determined. The result of this determination is then output to the direction determination unit 622.

[0113] In this embodiment, the signals from the vehicle speed sensor 603 and the road surface analysis device 602 determine Determine. When a signal indicating that the vehicle speed is below a predetermined speed is received from the vehicle speed sensor 603, In addition, the decision is made to light it up. Also, the road surface signal received from the road surface analysis device 602 is included The target illuminance value (target illuminance value) is determined by the reflectance. Based on this, for example, the duty cycle in pulse width modulation control is determined. Note that the target illuminance The information regarding the correspondence between values ​​and duty cycles is stored in ROM613 beforehand.

[0114] The direction determination unit 622 determines when the illuminance determination unit 621 determines that the optical device 1 should be lit. Determine 00. The optical device 100 to be illuminated is determined by the direction indicator signal.

[0115] When the direction determination unit 622 receives a direction indicator signal indicating a right turn, the right turn optical device 10 It is decided to illuminate the 0R indicator. Also, when a left turn signal is received, it will turn left. It is decided to turn on the optical device 100L. In other cases, the optical device 100 for forward movement We decide to turn on F.

[0116] The vehicle position determination unit 623 determines whether the vehicle is in a predetermined blind spot and the determination result The output is sent to the direction determination unit 622. The vehicle position determination unit 623 receives the position information acquisition device 604 from the vehicle position determination unit 623. The system receives the vehicle's current location information and map information, and if the vehicle's current location is identified as belonging to another vehicle's driver, Determine whether or not a location is a blind spot. Identify areas that are blind spots for drivers of other vehicles. The information to be used is predetermined and stored in ROM613.

[0117] Figure 18 shows an example of the lighting control process flow by the lighting controller 610 of this embodiment. This is the processing flow. It is executed at predetermined time intervals. Here, upon receiving the lighting instruction signal... The lighting control circuit 160 of the optical device 100 lights up the light source 110 only while it is present.

[0118] First, the illuminance determination unit 621 determines the vehicle speed based on the vehicle speed signal received from the vehicle speed sensor 603. Determine whether the value is below a certain threshold (step S1101).

[0119] If the vehicle speed exceeds a predetermined value, the process will terminate immediately.

[0120] If the vehicle speed is below a predetermined value, the illuminance determination unit 621 receives the road surface analysis device 602 from the road surface analysis device 602. The signal determines whether the reflectivity of the road surface 300 is below a predetermined value (step S11). 02).

[0121] The illuminance determination unit 621 determines the target illuminance value of the light-gathering mark 400 if the reflectance is less than a predetermined value. Determine the duty cycle (light source duty cycle) in pulse width modulation control (step (P1103). Furthermore, the illuminance determination unit 621 provides a lighting signal that includes information on the light source duty cycle. , output to the direction determination unit 622 (step S1104). On the other hand, if the reflectance is greater than a predetermined value In conclusion, the process will be terminated.

[0122] When the direction determination unit 622 receives a lighting signal, it receives a direction indicator signal indicating a right turn. Determine whether or not (step S1105).

[0123] When a direction indicator signal indicating a right turn is received, the direction determination unit 622 controls the right turn optical device 1 A signal to turn on the light is output to 00R (step S1106), and the process ends.

[0124] If the direction determination unit 622 has not received a direction indicator signal indicating a right turn, it will indicate a left turn. Determine whether or not an instruction signal has been received (step S1107).

[0125] When a direction indicator signal indicating a left turn is received, the direction determination unit 622 controls the left turn optical device 1 A signal to turn on the light is output to 00L (step S1108), and the process ends.

[0126] If no left turn signal is received, the vehicle position determination unit 623 determines the current position of the vehicle. Determine whether the position is a blind spot (step S1109), and determine whether the position is a blind spot If it is determined that this is the case, the determination result is output to the direction determination unit 622.

[0127] If the location is a blind spot, the direction determination unit 622 will turn on the forward optical device 100F. The system outputs an indicator signal (step S1110) and terminates the process.

[0128] On the other hand, if it is determined that the location is not a blind spot, the process will terminate.

[0129] [Reflector shape] As described above, in this embodiment, six optical devices 100 are used. Here, Figure 14(b As shown in the diagram, the first forward optical device 100Fa is installed at a height of 600 mm and forward 2 An arrowhead pattern is displayed on the road surface 300 mm away. Therefore, the first embodiment This can be achieved using the optical device 100 described with reference to Figures 4(a) to 7(c). However, illumination The beam 301 is the road surface 300, and the light source 110 is a nichia NCDA170C(23 Use 0lm).

[0130] The ray tracing simulation of the illuminance distribution on the road surface 300 obtained by the first forward optical device 100Fa The results of the test are shown in Figure 19. As shown in this figure, the first forward optical device 100Fa Then, an orange forward pattern 430a is formed in the pattern display area 401 on the road surface 300. ru.

[0131] Below, from among the second forward-moving optical device 100Fb and the right / left-turning optical devices, we will represent them as follows: right turn Optical devices for use (first right-turn optical device 100Ra and second right-turn optical device 100Rb) An example of the shape of the reflector 120 and its positional relationship with the light source 110 will be described below. The illumination surface 301 is the road surface 300, and the coordinates used in the description of the optical device 100 of the first embodiment The explanation will use system 911. Each is installed at the position shown in Figure 14(b), and the road surface 300 This section explains an example of displaying the shape shown in Figure 14(b) at the display location shown in Figure 14(b) above. I will reveal it.

[0132] [Second advancement optical device] Shape of the effective area of ​​the reflective surface 121 of the reflector 120 of the second forward optical device 100Fb An example of the positional relationship with the light source 110 will be explained using Figures 20(a) to 22. The optical device 100Fb, as shown in Figure 14(b), is used to observe the road surface 300 at a depth of 600 mm. An arrowhead-shaped forward pattern 430b is formed 1200 mm ahead.

[0133] Figures 20(a) to 20(d) show the effective area of ​​the reflective surface 121 of the reflector 120, respectively. This diagram shows the relative positions of the region and the light source 110. Figure 20(a) is an oblique view, and Figure 20(b) is Figure 20(c) is a plan view of z'-y', Figure 20(d) is a plan view of x'-y', and Figure 20(d) is a plan view of x'-z' Plan view.

[0134] Here, the same light source 110 as in the optical device 100 of the first embodiment is used. First region 12 The settings for 1a and the second region 121b are the same.

[0135] However, the center coordinates of the light-emitting area of the light source 110 are set to (0, -8.5, 7.5). Also, the pa The pattern display area 401 is an area of 700 mm to 1200 mm in the z'-axis direction. Also, The first area 121a forms a first irradiation image, which is a partial irradiation image, in the area of the pattern display area 401 where the x'-coordinate is from -400 mm to 0 m m. Also, the second area 121b forms a second irradiation image, which is a partial irradiation image, in the area where the x'- coordinate is from 0 mm to 400 mm.

[0136] As the free-form surface shapes of the first area 121a and the second area 121b, the point sequence data of their respective effective areas are shown in Table 541 of FIG. 21 and Table 542 of FIG. 22. Here, as the point sequence data the direction cosines (l', m', n') of each position (x', y', z') of the coordinate system 911 are shown .

[0137] Here, the simulation result by ray tracing of the illuminance distribution on the road surface 300 obtained by the second forward optical device 100Fb with the above specifications is shown in FIG. 23. Here, among the LEDs having the above-mentioned light-emitting area for the light source 110, nichia NCDW170C (350 lm) is used and an irradiation image is formed on the road surface 300.

[0138] As shown in this figure, according to the second forward optical device 100Fb, a forward pattern 430b is formed in the pattern display area 401 on the road surface 300.

[0139] [First right-turn optical device] An example of the shape of the effective area of the reflecting surface 121 of the reflector 120 and the positional relationship with the light source 110 of the first right-turn optical device 100Ra will be described using FIGS. 24(a) to FIG. 26. First right turn The folding optical device 100Ra, as shown in Figure 14(b), is located at a road surface 300 mm below, 2221mm ahead, there is a right-turn pattern 450a in the shape of an arrowhead rotated 45 degrees clockwise. To form.

[0140] Figures 24(a) to 24(d) show the effective area of ​​the reflective surface 121 of the reflector 120, respectively. This diagram shows the relative positions of the region and the light source 110. Figure 24(a) is an oblique view, and Figure 24(b) is Figure 24(c) is a plan view of z'-y', Figure 24(d) is a plan view of x'-y', and Figure 24(d) is a plan view of x'-z' Plan view.

[0141] Here, the same light source 110 as in the first forward optical device 100Fa is used. The coordinates of the center of the light region are also the same.

[0142] However, the pattern display area 401 is the area from 1461mm to 2321mm in the z' axis direction. Furthermore, the first region 121a and the second region 121b are as shown in Figure 24(c). The reflective surface 121 of the reflector 120 passes through the point (2.3, 0, 0) in coordinate system 911, z This is a division by a plane parallel to the '-y' plane. The area on the left side of the diagram is the first region 121. a. The area on the right is the second area 121b. The first area 121a is the pattern display area 40 Of the 1s, the first irradiation is a partial irradiation image in the region where the x' coordinate is from -200 mm to 200 mm. An image is formed. In addition, the second region 121b is the region where the x' coordinate is from -200 mm to 650 mm. A second irradiation image, which is a partial irradiation image, is formed in the region.

[0143] The point sequence data for the effective regions of the first region 121a and the second region 121b are shown in Figure 2. This is shown in Table 551 of Section 5 and Table 552 of Figure 26. Here, the point sequence data is in coordinate system 91. The direction cosines (l’, m’, n’) at each position (x’, y’, z’) in 1 are shown.

[0144] Here, the illumination distribution on the road surface 300 obtained by the first right-turn optical device 100Ra of the above specification The simulation results by ray tracing are shown in Fig. 27(a). Here, the light source 110 uses, among the LEDs having the above light-emitting region, nichia NCDA170C (230lm ) to form an irradiation image on the road surface 300.

[0145] As shown in this figure, according to the first right-turn optical device 100Ra, a pattern display area 401 on the road surface 300 forms a right-turn pattern 450a.

[0146] [Second right-turn optical device] An example of the shape of the effective region of the reflecting surface 121 of the reflector 120 of the second right-turn optical device 100Rb and the positional relationship with the light source 110 will be described using Figs. 28(a) to Fig. 29. The second right turn optical device 100Rb, as shown in Fig. 14(b), is 600 mm below the road surface 300, 1777 mm ahead, and forms a right-turn pattern 45 0b in the shape of an arrowhead rotated 26.57 degrees clockwise.

[0147] Here, the same light source 110 as that of the optical device 100 of the first embodiment is used. The coordinates of the center of the light-emitting region of the light source 110 are also the same.

[0148] However, the pattern display area 401 is the region from 1177 mm to 1777 mm in the z’-axis direction. Also, as shown in Fig. 28(c), the first region 121a and the second region 121b divide the reflecting surface 121 of the reflector 120 with a plane passing through the point (3, 0, 0) of the coordinate system 911 and parallel to the z’ -y’ plane. The region on the left side in the figure is the first region 121a in the figure. The area on the right is the second area 121b. The first area 121a is the pattern display area 401 Of these, the first irradiation image is a partial irradiation image in the region where the x' coordinate is from -150 mm to 150 mm. It forms the region. In addition, the second region 121b is the region where the x' coordinate is from -150 mm to 550 mm. Then, a second irradiation image, which is a partial irradiation image, is formed.

[0149] The free surface shapes of the first region 121a and the second region 121b are as follows: The data for the sequence of points is shown in Table 561 in Figure 29 and Table 562 in Figure 30. Here, the data for the sequence of points As the data, the direction cosines (l', m') of each position (x', y', z') in coordinate system 911. This shows n').

[0150] Here, the illuminance distribution on the road surface 300 obtained by the second right-turn optical device 100Rb with the above specifications. The simulation results obtained by ray tracing are shown in Figure 27(b). Here, light source 110 Among the LEDs having the above-mentioned light-emitting region, nichia NCDW170C (350lm) Using this method, an image was projected onto the road surface 300.

[0151] As shown in this figure, according to the second right-turn optical device 100Rb, the pattern on the road surface 300 A right-turn pattern 450b is formed in the display area 401.

[0152] As described above, according to this embodiment, the first embodiment and / or second embodiment A direction-of-travel display device 600 is provided using optical devices 100 and 101 as described in the morphology. In other words, according to this embodiment, the light utilization efficiency is good, the structure is simple, and the form indicates a specific intention. This allows a shape to be formed on the road surface 300. This makes it possible to determine the presence of the vehicle, and furthermore, the path of the vehicle, etc. It allows you to communicate your future intentions to others (drivers of other vehicles, pedestrians, etc.).

[0153] Here, using each of the optical devices 100 described above, a focusing marker is placed on the road surface 300 in front of the vehicle 200. Figure 31 shows the simulation results of how the display of "Ku 400" appears from the perspective of other vehicles, such as vehicle 202. (a) to Figure 31(f) are shown. Here, as shown in Figure 16 above, the position of other vehicle 202 The location is far away, that is, on a road perpendicular to the road the vehicle is on, at a distance of 60m from the vehicle. do.

[0154] As mentioned above, the forward optical device 100F, the left-turn optical device 100L, and the right-turn optical device Of the focusing marks illuminated by device 100R, the focusing marks furthest from vehicle 200 (forward pattern) The colors of the left-turn pattern (430a, left-turn pattern 440a, right-turn pattern 450a) are orange, and the vehicle Focusing marks close to (forward pattern 430b, left turn pattern 440b, right turn pattern 450) The color of b) is white. Also, left-turn patterns 440a and 440b are the same as the progress of other vehicle 202. They are arranged in a row in the direction of the line. Similarly, in both right-turn patterns 450a and 450b, other vehicles 2 They are arranged in a line in the direction of travel of 02.

[0155] Figure 31(a) shows left-turn patterns 440a and 440b, as shown in Figure 14(b). These are examples of displaying them in different colors. Figure 31(b) shows left turn patterns 440a and 440 This is an example where b is displayed in the same color. Figure 31(c) shows forward patterns 430a and 430b. As shown in Figure 14(b), this is an example where each is displayed in a different color. Figure 31(d) This is an example where forward patterns 430a and 430b are displayed in the same color. Figure 31(e) is on the right Folding patterns 450a and 450b are displayed in different colors, as shown in Figure 14(b). This is an example of how it was done. Figure 31(f) shows right-turn patterns 450a and 450b displayed in the same color. This is an example.

[0156] As shown in this figure, each light-gathering mark 400 appears distorted when viewed from a distance (60m away). However, according to this embodiment, when turning right or left, the two light-gathering marks 400 are visible to others. They are arranged so that they overlap vertically, and their colors are also changed. Therefore, the planned direction of travel of the vehicle, In other words, the intention is easy to understand. In particular, the arrow indicating the direction the vehicle is moving (arrow indicating the direction farther away from the vehicle) By pre-determining and fixing the colors used for these elements, the intention becomes clearer.

[0157] Generally, other people are not located in a fixed position relative to one's own vehicle. The light-gathering mark 400 shown can be observed by someone who is relatively close to the vehicle, and by someone who is far away. The appearance of the light-gathering mark 400 differs depending on whether it is observed by another person or not.

[0158] For example, if the driver of another vehicle, vehicle 202, is viewing the light-gathering mark 400 from a height of 1.2m Let's consider this. In this case, if the vehicle is 60m away from your vehicle, the lateral direction is different compared to when it is 10m away. The 400 light-gathering mark is reduced in shape to approximately 0.19 times in the front and approximately 0.04 times in the depth direction. This will happen.

[0159] In other words, the light-gathering mark, which is intended to be observed by others nearby, will not be visible to others at a distance to the vehicle itself. It is difficult to judge the intention, and the light-gathering mark, which is intended to be observed by others at a distance, is not suitable for others nearby. This makes it difficult to judge the intentions of the vehicle itself.

[0160] However, according to this embodiment, as described above, for left turns and right turns, there are two The following focusing marks 400 indicate the direction of travel. The display color of the light-gathering mark 400 that is close to the vehicle and the light-gathering mark 400 that is far from the vehicle are different. It is considered to be.

[0161] Therefore, according to the direction of travel display device 600 of this embodiment, if another vehicle is near your vehicle, the light-gathering display will be displayed. When looking at the 400, the intention of the vehicle can be easily recognized. Furthermore, when viewed by others at a distance... Even though they are similar, the details of the shape are difficult to discern, but they appear to be marks with two colors overlapping. You can tell whether your vehicle is making a right turn or a left turn by whether a specific color is visible at the top or bottom. It is easy to determine what is being attempted. Also, in the case of a forward movement mark, if the two colors overlap... It appears that way, and it's easy to see that they are trying to move forward.

[0162] Therefore, according to the direction of travel display device 600 of this embodiment, regardless of the position of other people, It is easy to understand the planned direction of travel. Furthermore, according to this embodiment, such a direction of travel display device 60 This can be achieved with a simple configuration, at low cost, and with high light utilization efficiency.

[0163] Furthermore, the direction of travel display device 600 of this embodiment uses a lens 170 as an optical element. It would be fine to implement it.

[0164] Furthermore, in this embodiment, the forward optical device 100F, the left-turn optical device 100L and Each right-turn optical device 100R is equipped with two optical devices, and adjusts according to the distance from the vehicle. It is configured to display light-gathering marks of different colors. However, they are arranged in each direction. The number of optical devices 100 is not limited. Each optical device in each direction has three or more light A learning device 100 may be provided. And, a forward optical device 100F and a left-turn optical device 10 The multiple optical devices 100 provided in 0L and the right-turn optical device 100R are, The system is designed to display different colored light-gathering marks in different pattern display areas on the road surface 300. It is permissible.

[0165] Furthermore, the optical devices 100 in each direction may share the same body 150 and cover 140. That is, within one body 150, there are multiple sets of light sources 110 and reflectors 120. It may be stored.

[0166] Alternatively, instead of providing optical devices 100 in each direction, one optical device 100, or This may be implemented by a set of optical devices 100 that display focusing marks arranged in a direction. The direction of travel display device 600 changes the orientation of the optical device 100 or the set of optical devices 100. It is further equipped with a movable mechanism. The lighting controller 610 is controlled by the turn signal switch 601. In response to the direction indicator signal, the movable mechanism outputs a signal to change the orientation of the optical device 100. The moving mechanism may be implemented, for example, by a motor.

[0167] Furthermore, in this embodiment, even when the speed is below a predetermined speed, the vehicle will be in a blind spot. The system is configured to illuminate the forward-moving optical device 100F only when it is present, but it is not limited to this. It is not possible. For example, even if the speed is below the prescribed speed, if the turn signal is not operated Alternatively, the forward-facing optical device 100F may be configured to be always illuminated. In this case, the lighting control The Trolla 610 does not necessarily need to include the vehicle position determination unit 623.

[0168] Furthermore, in this embodiment, the optical device 100 is illuminated only when the vehicle is stopped or traveling at a low speed. Then, the focusing mark 400 is displayed. However, control based on vehicle speed is not limited to this. No. For example, even when driving at high speed, such as on an expressway, if there are no pedestrians around... In suitable environments, the optical device 100 may be configured to light up or blink.

[0169] In this case, the lighting controller 610 acquires positional information, such as from navigation satellites like GPS. Using information from device 604 and vehicle speed sensor 603, it is determined that the vehicle is traveling on an expressway. It determines whether the vehicle is in motion. If it is traveling on an expressway, the optical device 100 is illuminated. Alternatively, you could make it blink.

[0170] In this embodiment, the road surface 300 in front of the vehicle 200 indicates the direction of travel of the vehicle 200. Display the light-gathering mark 400. However, the display of the light-gathering mark 400 is for vehicle 200. Not limited to the front. Specifically, the area around the vehicle 200, which is a predetermined range from the vehicle 200. This can be at least one of the front, side, and rear of the vehicle 200.

[0171] For example, an optical device 100 is installed at the rear of the vehicle 200 and connected to a lighting controller 610. Based on a signal from a reverse gear sensor (not shown) indicating that the reverse gear has been activated. The light-gathering mark 400 may be displayed at the rear of the vehicle 200. The vehicle may be configured to display the direction of travel on the road surface 300 behind it when it is moving forward.

[0172] Furthermore, optical devices 100 are provided at the front and rear of the vehicle 200, and the vehicle 200 is forward When proceeding in the opposite direction, the direction of travel should be towards the road surface 300 in front of the vehicle 200, and when proceeding in the opposite direction... The direction of travel may be indicated on the road surface 300 behind the vehicle 200.

[0173] In other words, the direction of travel for which the light-gathering mark is displayed is not limited to forward, left, or right, and furthermore It may be configured to display in multiple directions of travel, such as the rear. In this case, the optical device 100 is configured A lighting controller 6 is provided for each direction of travel, corresponding to the direction of travel, where the focusing mark is displayed. Based on the detection signal from the state detection device, 10 determines the direction of travel of the vehicle 200, and The optical device 100, which is positioned in accordance with the direction of travel, is turned on or flashes.

[0174] In this case as well, the number of optical devices 100 is less than the number of directions in which the focusing marks are displayed. The above display may be achieved by configuring the optical device 100 or the optical device A movable mechanism as described above may be provided to change the orientation of the 100 sets. The controller 610 determines the direction of travel of the vehicle 200 based on the detection signal from the status detection device. Then, a signal is output to the movable mechanism so that a focusing mark is displayed in the specified direction of travel. Example For example, a single optical device capable of displaying focusing marks in all directions of travel. It may be 00, or the focusing mark may be displayed in all directions of travel ahead. A possible first optical device 100 and a focusing mark in all directions of travel to the rear that displays a focusing mark. It may also be paired with a second optical device 100 capable of displaying a value.

[0175] Furthermore, at this time, each optical device 100 is positioned on the road surface 300, which is the illumination surface, from the vehicle 200. Multiple display areas at different distances each show a focusing mark with a different color depending on the distance. It may be configured to allow this.

[0176] <Example 1> In each of the above embodiments, a focusing mark indicating a specific intention is placed on the road surface 300, which is the illumination surface. As a result, an arrowhead pattern is formed as the illuminated image (focusing mark) 400. However, The focusing mark 400 to be displayed is not limited to this. For example, the arrow shaft An arrow pattern may also be provided.

[0177] The shape of the reflector 120 that achieves this will be explained using Figures 32 to 36.

[0178] Here, we will use the coordinate system 911 used in the description of the optical device 100 of the first embodiment. Furthermore, the same light source 110 as in the optical device 100 of the first embodiment is used. The coordinates of the center are also the same.

[0179] However, as shown in Figure 32, in this modified example, the z' axis direction of the pattern display area 401 The range is between 1200mm and 2000mm. The range in the x' axis direction is the same.

[0180] Figures 33(a) to 33(d) show the effective area of ​​the reflective surface 121 of the reflector 120, respectively. This is a diagram showing the relative positions of the region and the light source 110. Figure 33(a) is an oblique view, and Figure 33(b) is Figure 33(c) is a plan view of z'-y', Figure 33(d) is a plan view of x'-y', and Figure 33(d) is a plan view of x'-z' Plan view.

[0181] Furthermore, in this modified example, as shown in Figure 33(c), the reflective surface 121 of the reflector 120 is , each consisting of three different free surface regions (first region 121a, second region 121b, third region) It includes 121c). The first region 121a, the second region 121b, and the third region 121c are As shown in Figure 33(c), the reflective surface 121 of the reflector 120 is located at point (- A plane parallel to the z'-y' plane passing through (4, 0, 0) and the z'-y' plane passing through the point (4, 0, 0) It is divided by a plane parallel to it. In the diagram, the area on the left is the first area 121a, and the center The area on the right is the second region 121b, and the area on the right is the third region 121c. The first region 121a is Within the pattern display area 401, partial illumination is applied to the area where the x' coordinate is from -500 mm to 0 mm. It forms the first projected image, which is a projection image. Also, the second region 121b has an x' coordinate of -100 mm. A second irradiation image, which is a partial irradiation image, is formed in the region 100 mm from the first. The third region 121c is A third irradiation image, which is a partial irradiation image, is formed in the region where the x' coordinate is 0 mm to 500 mm.

[0182] The free surface shapes of the first region 121a, the second region 121b, and the third region 121c are as follows: The point sequence data for each effective region is shown in Table 571 of Figure 34, Table 572 of Figure 35, and Figure 3 This is shown in Table 573 of section 6. Here, the point sequence data is the position (x') of each position in coordinate system 911. This shows the direction cosines (l', m', n') of y', z'.

[0183] Here, the ray tracing of the illuminance distribution on the illuminated surface 301 obtained by the optical device 100 with the above specifications is performed. The simulation results are shown in Figures 37(a) to 37(d). Here, light source 11 0, among the LEDs having the above light-emitting region, nichia NCDW170C (350l Using m), an irradiation image was formed on the irradiation surface 301.

[0184] Figure 37(a) shows the light emitted from the light source 110, which is reflected by the first region 121a. Furthermore, the illuminance distribution (first illumination image) 471a of the pattern display area 401 on the illumination surface 301 is shown. Figure 37(b) shows the pattern on the illuminated surface 301 obtained by reflection in the second region 121b. The illuminance distribution (second illumination image) 471b of the display area 401 is shown. Figure 37(c) shows the third area. The illuminance distribution of the pattern display area 401 on the illuminated surface 301, obtained by reflection at 121c ( The third irradiation image (471c) is shown. Also, Figure 37(d) shows the first region 121a and the second region 12 The illuminance distribution (concentration mark) 471 due to 1b and the third region 121c is shown.

[0185] As shown in Figure 37(d), according to the optical device 100 of this modified example, the light on the irradiation surface 301 An arrow-shaped light-gathering mark 471 is formed in the turn indicator area 401.

[0186] In this modified example, lens 170 may be used as the optical element.

[0187] Furthermore, the focusing marks that represent a specific intention are not limited to those indicating direction, such as arrowheads or arrowheads. For example, by forming X-shaped, polygonal, or other deflection surfaces, different partial illumination images can be created on the illumination surface 301. The image is divided into multiple sub-regions, and various shapes are realized by combining the illuminated images from each sub-region. It is possible.

[0188] <Modification 2> Furthermore, in the above embodiment and modified example, when the optical device 100 is equipped with one light source 110 This was explained using the example. However, the light source 110 may be provided in multiple locations. It is equipped with a light source 110, and the light from each light source 110 is focused by a single optical element, multiple The irradiation image may be formed at different positions on the irradiation surface 301.

[0189] Hereinafter, the optical device 102, which has two light sources 110, has a reflector 120 as an optical element. Let's explain using an example where the following is used. In the optical device 102, two light sources 110 are distinguished. If necessary, they are referred to as the first light source 110a and the second light source 110b, respectively.

[0190] The effective area of ​​the reflective surface 121 of the reflector 120, and the first light source 110a and the second light source 11 The positional relationship between the center of the luminescence region of 0b and Figures 38(a) to 38(d) is shown.

[0191] Figures 38(a) to 38(d) show the effective area of ​​the reflective surface 121 of the reflector 120, respectively. This is a diagram showing the relative positions of the region and the light source 110. Figure 38(a) is an oblique view, and Figure 38(b) is Figure 38(c) is a plan view of z'-y', Figure 38(d) is a plan view of x'-y', and Figure 38(d) is a plan view of x'-z' Plan view.

[0192] Here, the same coordinate system 911 as in the first embodiment is used. The first light source 110a is the actual The shape of the light source 110 and the light-emitting region used in the application is the same. That is, the light-emitting region is along the x' axis. LEDs measuring 1.15 mm in both the directional and z' axis directions (nichia NCSA170) Use C). However, the coordinates of the center of the emission area are (0, -12, 13.5), and the central axis of the beam angle is (0, -12, 13.5). Position it so that the direction is the y' axis.

[0193] As the second light source 110b, the light-emitting area is 1.15 mm in the x' axis direction and 2.3 mm in the z' axis direction. A mm LED (nichia NC2W170C) is used. Then, the coordinates of the center of the light-emitting area are... The antenna is positioned at (0, -12, 18.3) such that the axis of the central direction of the beam angle is aligned with the y' axis.

[0194] Here, two arrows are displayed as the illumination image 400 in the pattern display area 401 of the illumination surface 301. Let's explain using the shape of the tail as an example.

[0195] The pattern display area 401, illuminated by light from the first light source 110a, has a z' axis direction of 1500m. The range is m to 2300 mm, and the x' axis range is -500 mm to 500 mm. Second The pattern display area due to light from light source 110b is 1000mm to 135mm in the z' axis direction. 0mm, x' axis direction is in the range of -500mm to 500mm.

[0196] The basic configuration of the reflective surface 121 of the reflector 120 is the same as in the first embodiment. That is, as shown in Figure 38(c), it was obtained by dividing it with a plane parallel to the z'-y' plane passing through the origin. It comprises a first region 121a and a second region 121b. Each of the 21b surfaces has a different freeform shape.

[0197] The first region 121a is the pattern display region 401, where the x' coordinate is from -500 mm to 0 A first irradiation image, which is a partial irradiation image, is formed in the mm region. In addition, the second region 121b is x A second irradiation image, which is a partial irradiation image, is formed in the region from 0 mm to 500 mm in coordinates.

[0198] The free surface shapes of the first region 121a and the second region 121b are as follows: The data for the sequence of points is shown in Table 581 in Figure 39 and Table 582 in Figure 40. Here, the data for the sequence of points As the data, the direction cosines (l', m') of each position (x', y', z') in coordinate system 911, This shows n').

[0199] Here, the ray tracing of the illuminance distribution on the illuminated surface 301 obtained by the optical device 102 with the above specifications is The simulation results are shown in Figure 41. Here, the LED used as the first light source 110a is shown. The luminous flux of the first light source was set to 230 lm, and the luminous flux of the LED used in the second light source 110b was set to 90 lm. This is the result in that case.

[0200] In this figure, the illuminance distribution (concentration mark) 481a is due to the light from the first light source 110a. The illuminance distribution (concentration mark) 481b is due to the light from the second light source 110b.

[0201] As shown in this figure, by providing two light sources 110, the pattern on the illuminated surface 301 is Two arrowhead patterns can be displayed in the display area 401.

[0202] The system is equipped with multiple light sources 110, and the light from each light source 110 is collected by a single optical element. Furthermore, when multiple irradiation images are formed at different positions on the irradiation surface 301, the multiple irradiation images that are formed... The illuminances should ideally be approximately the same.

[0203] In general, even if the amount of luminous flux emitted from multiple light sources 110 is the same, multiple light sources 11 0 Each light-emitting region, the distance between the light source 110 and the reflector 120, the size of the illuminated image Due to differences in size and other factors, the illuminance of the illuminated image corresponding to each light source 110 often differs significantly. i. In this modified example, based on this, the illuminance of the illuminated image corresponding to each light source 110 will be approximately the same. To achieve this, the amount of luminous flux emitted from each light source 110 is set to a different value in advance.

[0204] The amount of luminous flux from each light source 110 is, for example, determined in advance by the illuminance of the illuminated image corresponding to the amount of luminous flux from each light source 110. Investigate the relationship between these factors, and based on that relationship, ensure that the illuminance of multiple illuminated images is approximately the same. It will be set to this.

[0205] In the example shown in Figure 41, the luminous flux of the LED used in the first light source 110a is set to 230 lm, and By setting the luminous flux of the LED used in the two light sources 110b to 90lm, the focusing mark 481a The illuminance of both and 481b are set to be approximately the same.

[0206] The luminous flux of each light source 110 is adjusted, for example, by controlling the current value. PWM control, that is, the light source 110 is made to blink within a period invisible to the human eye, completing one cycle. This can be done by changing the proportion of time the lights are on (duty cycle) within the period. can.

[0207] When controlling the current value, the relationship between the current value and illuminance for each illuminance image is predefined in ROM61. Store in 3. Then, the illuminance determination unit 621, based on the information from the road surface analysis device 602, Determine the current value required to obtain the determined target illuminance value, and then determine the direction of the lighting signal containing the current value information. Output to terminal 622.

[0208] Furthermore, when controlling the duty cycle, the relationship between the duty cycle and illuminance for each illuminance image is... The data is stored in ROM 613 beforehand. Then, the illuminance determination unit 621 determines the road surface analysis device 602 Based on the information, the duty cycle to obtain the target illuminance value is determined, and the duty cycle A lighting signal containing this information is output to the direction determination unit 622.

[0209] In this modified example, the shape of the reflector 120 may be changed to an arrow pattern. Alternatively, lens 170 may be used instead of reflector 120.

[0210] Furthermore, the present invention is not limited to the embodiments and variations described above, and various Further modifications are included. That is, various modifications that do not depart from the spirit of the present invention are included. This falls within the technical scope of the invention. Furthermore, each of the embodiments and modifications described above is intended to illustrate the present invention. This is for illustrative purposes only, and the present invention is not necessarily limited to these embodiments and / or It is not necessary to have all the components included in the modified example. [Explanation of Symbols]

[0211] 100: Optical device, 100F: Forward optical device, 100Fa: First forward optical device, 10 0Fb: Second forward optical device, 100L: Left turn optical device, 100La: First left turn optical device Device, 100Lb: Optical device for second left turn, 100R: Optical device for right turn, 100Ra: First Right turn optical device, 100Rb: Second right turn optical device, 101: Optical device, 102: Optical device 110: Light source, 110a: First light source, 110b: Second light source, 111: Substrate, 120: Reflector, 121: Reflective surface, 121a: First region, 121b: Second region, 121c: Second Three regions: 130: support member, 131: fixing screw, 132: positioning pin, 140: cover 150: Body, 151: Lamp chamber, 152: Space, 160: Lighting control circuit, 170: Lens 171: Output surface, 171a: First region, 171b: Second region, 172: Incident surface, 200: Vehicle, 202: Other vehicles, 300: Road surface, 301: Illuminated surface, 302: Illuminated surface, 400: Illumination image (focusing mark), 401: Pattern display area, 402: Pattern display area Area, 411: Focusing mark, 411a: First irradiation image, 411b: Second irradiation image, 412: Focusing Mark, 412a: First irradiation image, 412b: Second irradiation image, 430a: Forward pattern, 43 0b: Forward pattern, 440a: Left turn pattern, 440b: Left turn pattern, 450a: Right Folding pattern, 450b: Right-turn pattern, 471: Focusing mark, 471a: First illumination image, 4 71b: second irradiation image, 471c: third irradiation image, 600: Direction of travel display device, 601: Turn signal switch, 602: Road surface analysis device, 6 03: Vehicle speed sensor, 604: Location information acquisition device, 610: Lighting controller, 611: C PU, 612: RAM, 613: ROM, 621: Illuminance determination section, 622: Direction determination section, 6 23: Vehicle position determination unit, 911: Coordinate system, 912: Coordinate system

Claims

1. A vehicle-mounted direction-of-travel display device, An optical device that displays a light-gathering mark indicating the direction of travel of the vehicle around the vehicle, The optical device is equipped with a lighting controller that controls the illumination or flashing of the optical device, The lighting controller acquires a detection signal from a state detection device mounted on the vehicle that detects at least one of the vehicle's behavior and the surrounding environmental information of the vehicle, and based on the detection signal, turns on or flashes the optical device. The optical device is a direction-of-travel display device that displays a plurality of light-gathering marks.

2. A direction of travel display device according to claim 1, A direction-of-travel display device in which multiple light-gathering marks are colored differently from adjacent light-gathering marks that are displayed consecutively.

3. A direction of travel display device according to claim 2, A direction of travel display device that displays multiple light-gathering marks so as to be aligned in the direction of travel of a vehicle in a lane that intersects with the lane in which the vehicle is located.

4. A direction of travel display device according to claim 1, The lighting is controlled based on the vehicle speed information obtained from the state detection device. A direction-of-travel display device that, when the speed information is below a predetermined speed, displays a plurality of the aforementioned light-gathering marks in front of the vehicle.

5. A direction of travel display device according to claim 4, The lighting is controlled based on the direction indicator signal obtained from the state detection device. When a right turn or left turn signal is received, If the light-gathering mark is displayed in front of the vehicle, the display of the light-gathering mark in front of the vehicle will be stopped. A direction indicator device that displays the light-gathering mark in the direction corresponding to the direction signal.

6. A direction of travel display device according to claim 5, When a right turn or left turn signal is received, A direction of travel display device that displays multiple light-gathering marks so as to be aligned with the direction of travel of vehicles in the lane that intersects with the lane in which the vehicle is located.

7. A direction of travel display device according to claim 1, The vehicle's speed information and position information are obtained from the aforementioned state detection device. If the speed information is below a predetermined speed, and the position information detects that the vehicle's position is in a blind spot from other vehicles, A direction-of-travel display device that displays a plurality of the aforementioned light-gathering marks in front of the vehicle.

8. A direction of travel display device according to claim 1, The vehicle's speed information and position information are obtained from the aforementioned state detection device. A direction-of-travel display device that, when the speed information is below a predetermined speed and the position information detects that the vehicle's position is at a location where it intersects with another road, displays a plurality of the aforementioned light-gathering marks in front of the vehicle.

9. A direction of travel display device according to claim 1, The system is equipped with a number of light sources corresponding to the aforementioned focusing marks, A direction-of-travel indicator wherein the luminous intensity of a light source that displays the focusing mark near the vehicle is greater than the luminous intensity of a light source that displays the focusing mark far from the vehicle.

10. A direction of travel display device according to claim 9, The luminous intensity of the aforementioned focusing mark is adjusted according to the illumination time. A direction indicator wherein the illumination time of a light source that displays the focusing mark near the vehicle is longer than the illumination time of a light source that displays the focusing mark far from the vehicle.

11. A direction of travel display device according to claim 1, A direction of travel indicator mounted on the left side of the vehicle and a direction of travel indicator mounted on the right side of the vehicle are direction of travel indicators in which the colors of the light-gathering marks are different.

Images