lighting equipment

Abstract

This invention discloses a lighting device. More specifically, this invention relates to a lighting device that, through a simple configuration, illuminates light at different locations. The lighting device according to an embodiment of the invention may include: a light illuminating unit; a light path adjusting unit for adjusting the path of light illuminating from the light illuminating unit to form a road surface pattern at predetermined locations on the road surface surrounding a vehicle; and a driving unit for adjusting the position of the light path adjusting unit to form the road surface pattern at different locations on the road surface surrounding the vehicle.

Description

Technical Field

[0001] The present invention relates to a lighting device, and more specifically, to a lighting device that, through a simple configuration, illuminates light at different locations. Background Technology

[0002] Lighting devices are used in a variety of fields, such as backlights for flat panel displays, indoor lights used in indoor environments, and various lights installed in vehicles.

[0003] The lighting devices installed on vehicles are used for illumination functions such as headlights and fog lights, or for signal functions such as night driving lights, position lights, turn signals, taillights, and brake lights. The installation standards and specifications of each light are stipulated by regulations in order to fully utilize their respective functions.

[0004] Recently, since the information that can be conveyed solely through lighting or signaling functions is limited, research is actively underway to convey more diverse information to drivers or surrounding vehicles by forming pavement patterns on the road surface around the vehicle to represent the information to be conveyed.

[0005] The road surface pattern formed around the vehicle needs to have different formation positions depending on the information to be conveyed. Furthermore, if lamps for forming the road surface pattern are individually equipped according to the formation position of the road surface pattern, the increase in the number of components, cost, and installation space will lead to a need for a solution that can simplify the structure and reduce the installation space while still illuminating various positions around the vehicle with the light used to form the road surface pattern.

[0006] [Existing Technical Documents]

[0007] [Patent Documents]

[0008] Patent Publication No. 10-2012-0055030 (Published on May 31, 2012) Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a lighting device in which different locations of the road surface around a vehicle can share the same configuration so that light can be irradiated to each other.

[0010] Furthermore, the present invention provides a lighting device that is not disturbed by the vehicle body when forming road surface patterns.

[0011] The technical problems to be solved by the present invention are not limited to those mentioned above. Those skilled in the art to which the present invention pertains can clearly understand other technical problems not mentioned through the following description.

[0012] To address the aforementioned technical problems, an illumination device according to an embodiment of the present invention may include: a light irradiation unit; a light path adjustment unit that adjusts the path of light irradiated from the light irradiation unit to form a road surface pattern at a predetermined position on the road surface surrounding the vehicle; and a drive unit that adjusts the position of the light path adjustment unit to form road surface patterns at different positions on the road surface surrounding the vehicle.

[0013] The light irradiation unit may include: a light source unit; and a light transmission unit, which transmits light generated from the light source unit to the light path adjustment unit.

[0014] The light source unit may include multiple light sources, and the light irradiation unit may further include a light synthesis unit that synthesizes light generated from the multiple light sources and directs it to the light transmission unit.

[0015] The light transmission unit may include a plurality of lenses for generating light with a concentration degree different from that generated from the light source unit.

[0016] The light transmission section may further include a mirror section that reflects light from one of the plurality of lenses so that it travels toward another lens.

[0017] The light incident on the light transmission unit and the light emitted from the light transmission unit can have different directions from each other.

[0018] The road surface pattern can be formed at positions with different intervals along the side of the vehicle, based on the optical axis of the light irradiation section and according to the tilt angle of the light path adjustment section.

[0019] The optical path adjustment unit can be rotatably connected to the rotation shaft of the drive unit, and the road surface pattern can be formed at least at one of the side, front and rear of the vehicle according to the rotation direction and rotation angle of the optical path adjustment unit.

[0020] The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit can vary according to at least one of the tilt angle of the light path adjustment unit based on the light axis of the light illuminating unit and the tilt angle of the rotation axis of the drive unit rotatably connected to the light path adjustment unit.

[0021] The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit can have a shape parallel to the front-to-back direction.

[0022] The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit can have a shape that varies with the intervals between the center line passing through the center of the vehicle in the left-right direction and the front-back direction, depending on whether the light is directed from the side of the vehicle toward the front and rear.

[0023] The optical path adjustment unit may include at least one reflective surface that reflects light irradiated from the optical irradiation unit.

[0024] The tilt angle of at least one of the reflective surfaces can be adjusted according to the travel path of the reflected light.

[0025] The at least one reflective surface may include multiple reflective surfaces whose tilt angle can be adjusted individually.

[0026] The at least one reflective surface may include: a plurality of reflective surfaces that reflect light irradiated from the light irradiation portion in different directions from each other, wherein the plurality of reflective surfaces may cause the road surface pattern to be formed simultaneously at different locations on the road surface around the vehicle.

[0027] The lighting device may further include: a housing with one side open to accommodate the light irradiation unit, the light path adjustment unit, and the drive unit, wherein the housing may have a cover that allows light to pass through on the open side so that the light irradiates the road surface around the vehicle.

[0028] One of the light irradiation section and the light path adjustment section can be closer to the vehicle body than the other.

[0029] Other specific aspects of the invention are included in the detailed description and accompanying drawings.

[0030] The lighting device of the present invention, as described above, has one or more of the following effects.

[0031] Since the position of the light irradiated by the light irradiation unit on the road surface around the vehicle can be adjusted by adjusting the tilt angle of the light path adjustment unit and rotating the light path adjustment unit, it is possible to share the configuration for irradiating different positions on the road surface around the vehicle, thereby simplifying the configuration and reducing the installation space.

[0032] Furthermore, since the position of the road surface pattern formed by the vehicle can be adjusted by adjusting at least one of the tilt angle of the optical path adjustment unit and the tilt angle of the rotation axis of the optical path adjustment unit, it also has the effect of preventing interference caused by the vehicle body when forming the road surface pattern.

[0033] The effects of the present invention are not limited to those mentioned above. Those skilled in the art to which this invention pertains can clearly understand other effects not mentioned through the description of the claims. Attached Figure Description

[0034] Figure 1 This is a perspective view showing a lighting device according to an embodiment of the present invention.

[0035] Figure 2This is a side view showing a lighting device according to an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram showing an exterior rearview mirror equipped with a lighting device according to an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram showing the optical path of the photosynthesis unit according to an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram showing the light transmission unit according to an embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram illustrating a light transmission unit according to another embodiment of the present invention.

[0040] Figure 7 This is a schematic diagram showing the tilt angle of the optical path adjustment section based on the optical axis of the light irradiation section according to an embodiment of the present invention.

[0041] Figure 8 and Figure 9 This is a schematic diagram showing the road surface pattern formed at the tilt angle of the optical path adjustment part according to an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram showing the direction of light travel when adjusting the tilt angle of the optical path adjustment unit according to an embodiment of the present invention.

[0043] Figures 11 to 13 This is a schematic diagram showing a road surface pattern formed by rotating the optical path adjustment unit according to an embodiment of the present invention.

[0044] Figure 14 This is a schematic diagram showing the optical path adjustment unit and the driving unit according to an embodiment of the present invention.

[0045] Figure 15 It shows that light is used by Figure 14 A schematic diagram of the trajectory illuminated by the optical path adjustment unit.

[0046] Figure 16 This is a schematic diagram showing an optical path adjustment unit and a driving unit according to another embodiment of the present invention.

[0047] Figure 17 It shows that light is used by Figure 16 A schematic diagram of the trajectory illuminated by the optical path adjustment unit.

[0048] Figure 18 This is a schematic diagram showing an optical path adjustment unit and a driving unit according to another embodiment of the present invention.

[0049] Figure 19 It shows that light is used by Figure 18 A schematic diagram of the trajectory illuminated by the optical path adjustment unit.

[0050] Figure 20 This is a schematic diagram illustrating the correction process of a road surface pattern according to an embodiment of the present invention.

[0051] Figure 21 This is a schematic diagram showing the reflective surface of the optical path adjustment section according to an embodiment of the present invention.

[0052] Figure 22 It is shown by means of Figure 21 A schematic diagram of the road surface pattern formed by the optical path adjustment unit.

[0053] Explanation of reference numerals in the attached figures:

[0054] 2: Exterior rearview mirror 2a: Housing

[0055] 2b: Cover 2c: Camera

[0056] 100: Light irradiation section; 110: Light source section

[0057] 111, 112, 113: Light source; 111a, 112a, 113a: Optical section

[0058] 120: Photosynthesis section; 130: Light transmission section

[0059] 131: First lens; 132: Second lens

[0060] 133: Mirror section; 200: Optical path adjustment section

[0061] 210, 211, 212: Reflecting surface; 300: Driving unit

[0062] 310: Rotation axis Detailed Implementation

[0063] The advantages and features of the invention, as well as the methods for achieving them, will become apparent from the detailed embodiments described below in conjunction with the accompanying drawings. However, the invention is not limited to the embodiments disclosed below, which can be implemented in various different forms. These embodiments are provided only to fully disclose the invention and to inform those skilled in the art of the scope of the invention, which is defined only by the scope of the claims.

[0064] Therefore, in some embodiments, to avoid the invention being interpreted vaguely, well-known process steps, well-known structures and well-known technologies are not specifically described.

[0065] The terminology used in this specification is for illustrative purposes and not intended to limit the invention. In this specification, unless otherwise stated, singular forms include plural forms as well. The terms "comprises" and / or "comprising" as used in this specification are used to mean, without excluding, the presence or additional meaning of one or more other constituent elements, steps, operations, and / or components besides those mentioned. Furthermore, "and / or" includes each of the mentioned items and all combinations thereof.

[0066] Furthermore, the embodiments described in this specification will be illustrated with reference to cross-sectional views and / or schematic diagrams, which serve as idealized examples of the invention. Therefore, the form of the schematic diagrams may be modified depending on manufacturing techniques and / or allowable tolerances. Accordingly, the embodiments of the invention are not limited to the specific forms illustrated, and variations in form resulting from manufacturing processes are also included. Moreover, in the various figures illustrated in this invention, for ease of explanation, individual components may be shown enlarged or reduced to some extent. Throughout this specification, the same reference numerals refer to the same components.

[0067] Hereinafter, the present invention will be described with reference to the accompanying drawings, which illustrate a lighting device according to an embodiment of the present invention.

[0068] Figure 1 This is a perspective view showing a lighting device according to an embodiment of the present invention. Figure 2 This is a side view showing a lighting device according to an embodiment of the present invention.

[0069] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, the lighting device 1 may include a light irradiation unit 100, a light path adjustment unit 200, and a driving unit 300.

[0070] In an embodiment of the present invention, an example will be given of a case in which the lighting device 1 is installed on a vehicle and is used to form a road pattern at a predetermined position on the road surface around the vehicle, representing various information that needs to be conveyed to the driver, surrounding vehicles, pedestrians, etc. However, it is not limited thereto. The lighting device 1 of the present invention can be installed not only on a vehicle, but also on various devices or places where light needs to be irradiated to multiple different positions.

[0071] When the lighting device 1 of the present invention is installed in a vehicle, various road surface patterns can be formed, such as road surface patterns indicating the direction of reversing or turning of the vehicle, or road surface patterns with a welcoming function where the vehicle shows a welcoming response to the driver when the driver approaches the vehicle.

[0072] Furthermore, in embodiments of the present invention, such as Figure 3 As shown, the following example will be used for explanation: The lighting device 1 is equipped with a housing 2a that is housed in the exterior rearview mirror 2 provided on both sides of the vehicle, so as to ensure the field of vision behind or to the side rear of the vehicle. However, it is not limited to this. The lighting device 1 of the present invention can be provided at various positions that can form a road surface pattern on the road surface around the vehicle.

[0073] The housing 2a of the exterior rearview mirror 2 can be formed with one side open to accommodate the lighting device 1 of the present invention. A cover 2b can be assembled on the open side of the housing 2a. At least a portion of the cover 2b is open or made of a light-transmitting material, so that the light generated from the lighting device 1 of the present invention can be transmitted and illuminate the road surface around the vehicle.

[0074] In the case where the lighting device 1 of the present invention is housed in the housing 2a, one of the light irradiation part 100 and the light path adjustment part 200 can be located closer to the vehicle body than the other. Hereinafter, in the embodiment of the present invention, the case where the light irradiation part 100 is located outside the vehicle than the light path adjustment part 200 will be described as an example, but the opposite case can also be realized.

[0075] at this time, Figure 3 This is an example of a camera mirror 2 that is equipped with a camera 2c instead of a mirror and displays the rear or side rear view captured by the camera 2c through a display device installed inside the vehicle. However, it is not limited to this and can also be similarly applied to situations where a mirror is provided instead of a camera 2c.

[0076] also, Figure 3 As an example, the cover 2b is assembled on the lower side of the housing 2a in a manner that allows light to illuminate the road surface around the vehicle, but it is not limited to this. The assembly position of the cover 2b can vary depending on the direction of light irradiated from the lighting device 1 of the present invention.

[0077] The light irradiation unit 100 can irradiate light with a light intensity or color suitable for forming a road surface pattern on the road surface around the vehicle.

[0078] The light irradiation unit 100 may include a light source unit 110, a light synthesis unit 120, and a light transmission unit 130.

[0079] The light source unit 110 may include multiple light sources 111, 112, 113 that produce light of different wavelengths. The number of light sources in the light source unit 110 or the wavelength of light produced from the light sources may be varied in different ways as required by the lighting device 1 according to the present invention, such as the amount or color of light.

[0080] In an embodiment of the present invention, the case of using a laser diode (LD) as multiple light sources 111, 112, 113 is described as an example, but it is not limited thereto. The multiple light sources 111, 112, 113 can be not only LDs, but also various types of light sources such as light-emitting diodes (LEDs) or bulbs.

[0081] In order to focus the light, the light generated from each of the multiple light sources 111, 112, 113 can be converted into parallel light by each of the multiple optical units 111a, 112a, 113a. In the embodiment of the present invention, the case of using aspherical lenses as the multiple optical units 111a, 112a, 113a is used as an example, but it is not limited to this. The multiple optical units 111a, 112a, 113a can not only use aspherical lenses, but also collimating lenses such as total internal reflection (TIR) ​​lenses and Fresnel lenses. They can also use reflectors that reflect the light generated from each of the multiple light sources 111, 112, 113 to the light combining unit 120.

[0082] The light synthesis unit 120 can synthesize light generated from at least one of the multiple light sources 111, 112, and 113.

[0083] Figure 4 This is a schematic diagram showing the optical path of the photosynthesis unit according to an embodiment of the present invention.

[0084] Reference Figure 4 According to an embodiment of the present invention, the light synthesis unit 120 can generate a first light L1 by synthesizing light L11, L12, L13 generated from a plurality of light sources 111, 112, 113, and the aforementioned... Figure 4 This is an example of a situation where light is generated from each of multiple light sources 111, 112, and 113.

[0085] In the embodiments of the present invention, the case of using a prism as the light synthesis unit 120 is described as an example, but it is not limited thereto. The light synthesis unit 120 can use not only a prism, but also a variety of optical elements capable of light synthesis, such as a mirror that transmits one of light of different wavelengths and reflects the other.

[0086] The light transmission unit 130 can generate light with a different focusing degree than the light generated by the light synthesis unit 120 and transmit it to the light path adjustment unit 200. In the embodiment of the present invention, the light incident on the light transmission unit 130 and the light emitted from the light transmission unit 130 have different directions, thereby preventing the overall size of the lighting device 1 of the present invention from becoming larger. A detailed description of this will be given later.

[0087] Figure 5 This is a schematic diagram showing the light transmission unit according to an embodiment of the present invention.

[0088] Reference Figure 5 In an embodiment of the present invention, the light concentration is adjusted by means of the light transmission unit 130 in order to improve the clarity of the road surface pattern formed on the road surface around the vehicle by means of the lighting device 1 of the present invention. In an embodiment of the present invention, the light concentration is improved by means of the light transmission unit 130 so that sufficient clarity can be ensured even if the position of the road surface pattern formed on the road surface around the vehicle is different.

[0089] The light transmission unit 130 may include a plurality of lenses 131 and 132 arranged along the light travel path. Hereinafter, in the embodiments of the present invention, the plurality of lenses 131 and 132 will be referred to as the first lens 131 and the second lens 132, respectively.

[0090] In the first lens 131 and the second lens 132, the effective area of ​​the second lens 132 can be formed smaller than that of the first lens 131 to increase the focusing power of the first light L1. The effective area of ​​the lens can be the area that affects the path of the incident light in the entire area of ​​the lens, and it can be the area with a predetermined radius radially centered on the optical axis of the lens. The effective area of ​​the lens can be the entire area of ​​the lens or a local area of ​​the lens.

[0091] Figure 5 This is an example of a case where the entire area of ​​the first lens 131 and the second lens 132 is the effective area and the second lens 132 has a smaller size than the first lens 131 to increase the light focusing power. However, it is not limited to this. Even if the first lens 131 and the second lens 132 have the same size, the position of the focal point F between the first lens 131 and the second lens 132 can be adjusted by adjusting the curvature of the first lens 131 and the second lens 132, thereby changing the effective area of ​​the first lens 131 and the second lens 132.

[0092] Based on the path of light, the first lens 131 can be located closer to the light combining unit 120 than the second lens 132. In an embodiment of the present invention, the case in which the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 are arranged to intersect each other and the mirror unit 133 is located between them will be described as an example.

[0093] In an embodiment of the present invention, the case in which the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 are set perpendicular to each other is used as an example for explanation, but it is not limited thereto. The angle between the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 may vary depending on the path of the light transmitted by means of the light transmission unit 130.

[0094] The mirror portion 133 can reflect the light transmitted through the first lens 131 so that it can travel toward the second lens 132. This is to ensure that there is a sufficient distance between the first lens 131 and the second lens 132 while preventing the overall size of the light irradiation portion 100 from increasing, based on the distance from each of the first lens 131 and the second lens 132 to the focal point F formed between the first lens 131 and the second lens 132.

[0095] In the foregoing embodiments, the following scenario is used as an example: with the path of light as a reference, the mirror portion 133 is located between the first lens 131 and the second lens 132, such that the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 intersect each other. However, it is not limited to this. With the path of light as a reference, the first lens 131 and the second lens 132 may be located before or after the mirror portion 133. In this case, the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 may be the same.

[0096] Figure 6 This is a schematic diagram illustrating a light transmission unit according to another embodiment of the present invention.

[0097] Reference Figure 6 Similar to the aforementioned embodiments, the light transmission unit 130 according to another embodiment of the present invention may include a first lens 131, a second lens 132, and a mirror unit 133.

[0098] In another embodiment of the present invention, in the light transmission unit 130, based on the light travel path, since the first lens 131 and the second lens 132 are located after the mirror unit 133, the optical axis Ax1 of the first lens 131 and the optical axis Ax2 of the second lens 132 can be the same.

[0099] exist Figure 6In the following example, the first lens 131 and the second lens 132 are located after the mirror part 133, based on the path of light. However, this is not the only case. It can also be applied similarly to the case where the first lens 131 and the second lens 132 are located in front of the mirror part 133, based on the path of light.

[0100] In the embodiments of the present invention, the reason for reflecting the light generated by the light combining unit 120 by the mirror unit 133 is that when the light combining unit 120, the first lens 131, and the second lens 132 are arranged in a straight line with the same optical axis, the optical path adjustment unit 200 and the driving unit 300 need to... Figure 2 The lighting device 1 of the present invention is located below the light irradiation section 100, thereby increasing the overall size of the lighting device 1. In contrast, in the embodiment of the present invention, the light incident on the light transmission section 130 and the light emitted from the light transmission section 130 are different from each other by means of the mirror section 133, so that the light path adjustment section 200 and the drive section 300 can be located on the side of the light irradiation section 100, thereby reducing the space occupied by the light path adjustment section 200 and the drive section 300, and can be easily installed even in situations where the installation space is relatively small, such as the exterior rearview mirror 2.

[0101] In an embodiment of the present invention, an example is given in which the light transmission unit 130 includes a plurality of lenses 131, 132 and a mirror unit 133 and generates a second light L2 with a higher focusing power than the first light L1 and transmits it to the light path adjustment unit 200. However, this is only an example to help understand the present invention and is not limited thereto. Depending on the light distribution characteristics such as the focusing power and brightness of the light transmitted to the light path adjustment unit 200, the light transmission unit 130 may include more than one lens. In the case where the light transmission unit 130 includes a single lens, the mirror unit 133 may be omitted.

[0102] Furthermore, in the above embodiments, the light irradiation unit 100 is described as an example of a light source unit 110, a light synthesis unit 120, and a light transmission unit 130. However, it is not limited to this. The light irradiation unit 100 may include various types of display devices (not shown) such as LCD, OLED, projectors, etc., which are capable of forming images with a predetermined shape or size. This allows the road surface pattern formed by the lighting device 1 of the present invention to have various shapes or sizes. In the case where the light irradiation unit 100 includes a display device, the shape or size of the road surface pattern formed by the lighting device 1 of the present invention may vary depending on the shape or size of the image formed by the display device.

[0103] Refer again Figure 1According to an embodiment of the present invention, the light path adjustment unit 200 can adjust the path of light so that the light irradiated from the light irradiation unit 100 travels to a predetermined position on the road surface around the vehicle. In an embodiment of the present invention, the light irradiated from the light irradiation unit 100 can be understood as the second light L2 generated by the light transmission unit 130.

[0104] The optical path adjustment unit 200 may include at least one reflective surface 210 that reflects light irradiated from the light irradiation unit 100, such as... Figure 7 As shown, the optical path adjustment unit 200 can be positioned at different intervals w1 and w2 laterally from the centerline C passing through the center of the vehicle in the front-rear direction, based on the optical axis Ax of the light irradiation unit 100 and according to the tilt angle θ of the optical path adjustment unit 200. Figure 8 and Figure 9 As shown, a road surface pattern P is formed, and Figure 8 and Figure 9 This is an example of a case where w2 is larger than w1.

[0105] also, Figure 8 and Figure 9 As an example of a road surface pattern P formed on either side of a vehicle, a similar road surface pattern can be formed on the other side.

[0106] At this time, the optical axis Ax of the light irradiation section 100 can be understood as the optical axis formed by the final end of the configuration that irradiates light from the light irradiation section 100 (i.e., the optical axis Ax2 of the second lens 132), and the optical axis Ax of the light irradiation section 100 can vary depending on the number or position of the lenses included in the light transmission section 130.

[0107] The reflective surface 210 of the light path adjustment unit 200 can be inclined such that the lower end is closer to the vehicle than the upper end, so that the light irradiated by the light irradiation unit 100 irradiates the road surface around the vehicle. In this case, the tilt angle θ of the light path adjustment unit 200 can be understood as the angle between the line extending from the point where the optical axis Ax of the light irradiation unit 100 intersects with the reflective surface 210 along the upper end of the reflective surface 210 and the optical axis Ax of the light irradiation unit 100.

[0108] In the foregoing embodiments, the optical path adjustment unit 200 is described as having a single reflective surface 210, but it is not limited thereto. The optical path adjustment unit 200 may also include multiple reflective surfaces that can be individually adjusted in tilt angle. When the optical path adjustment unit 200 includes multiple reflective surfaces, road surface patterns can be formed at multiple different locations, and the position of forming the road surface pattern can be adjusted by means of each of the multiple reflective surfaces.

[0109] The tilt angle θ of the optical path adjustment unit 200 can be preset or adjusted as needed. When it is necessary to adjust the tilt angle θ of the optical path adjustment unit 200, it can be adjusted by an actuator (not shown) operated by the driver.

[0110] For example, such as Figure 10 As shown, before adjusting the tilt angle θ of the optical path adjustment unit 200, if there is interference between the light traveling with the optical path adjustment unit 200 and the vehicle body, light loss may occur. Therefore, adjusting the tilt angle θ of the optical path adjustment unit 200 prevents interference between the light traveling with the optical path adjustment unit 200 and the vehicle body, thereby preventing light loss.

[0111] The drive unit 300 can adjust the position of the optical path adjustment unit 200. In the embodiment of the present invention, the case in which the drive unit 300 adjusts the position of the optical path adjustment unit 200 by rotating the optical path adjustment unit 200 coupled to the rotation shaft 310 is described as an example.

[0112] The optical path adjustment unit 200 is rotatably connected to the rotation shaft 310 of the drive unit 300. Therefore, when the drive unit 300 is driven, the optical path adjustment unit 200 can rotate around the rotation shaft 310, and when the optical path adjustment unit 200 rotates, as... Figures 11 to 13 As shown, the path of the light irradiated from the light irradiation unit 100 is changed, so that the position of the road surface pattern P formed on the road surface around the vehicle can be changed in the front-rear direction (such as the side, front, or rear of the vehicle), and the light irradiated from the light irradiation unit 100 can be understood as the second light L2 generated by the light synthesis unit 120.

[0113] at this time, Figures 11 to 13 As an example of a road surface pattern P formed on either side of a vehicle, a similar road surface pattern can be formed on the other side.

[0114] Furthermore, in the embodiments of the present invention, the driving unit 300 is used to rotate the optical path adjustment unit 200 about the rotation axis 310 as an example for explanation, but it is not limited to this. The driving unit 300 may be composed of two or more actuators. In this case, the driving unit 300 may simultaneously perform the function of adjusting the tilt angle θ of the optical path adjustment unit 200 and the function of rotating the optical path adjustment unit 200.

[0115] As described above, the position of the road surface pattern formed around the vehicle can vary depending on the tilt angle θ of the light path adjustment unit 200 (i.e., the tilt angle of the reflective surface 210) and the rotation direction and rotation angle of the light path adjustment unit 200.

[0116] Figure 14This is a schematic diagram showing the optical path adjustment unit and the driving unit according to an embodiment of the present invention. Figure 15 It is shown by means of Figure 14 A schematic diagram of the trajectory of light irradiated by the optical path adjustment unit.

[0117] Reference Figure 14 and Figure 15 When the optical path adjustment unit 200 is configured to have a first tilt angle θ1 with the optical axis Ax of the light irradiation unit 100 and the rotation axis 310 of the drive unit 300 is configured to coincide with the optical axis Ax of the light irradiation unit 100, when the optical path adjustment unit 200 rotates by means of the drive unit 300, the trajectory T1 illuminated by the light can have a straight line shape parallel to the front and rear directions, and when the optical path adjustment unit 200 rotates, the road surface pattern P can be formed at different positions along the trajectory T1 parallel to the front and rear directions.

[0118] at this time, Figure 14 and Figure 15 As an example, the optical path adjustment unit 200 is configured to have a first tilt angle θ1 of 45 degrees with the optical axis Ax of the light irradiation unit 100, but it is not limited to this. When the optical path adjustment unit 200 rotates, the trajectory of the light irradiation can change according to the tilt angle of the optical path adjustment unit 200.

[0119] Figure 16 This is a schematic diagram showing an optical path adjustment unit and a driving unit according to another embodiment of the present invention. Figure 17 It is shown by means of Figure 16 A schematic diagram of the trajectory of light irradiated by the optical path adjustment unit.

[0120] Reference Figure 16 and Figure 17 When the light path adjustment unit 200 is configured to have a second tilt angle θ2 larger than the first tilt angle θ1 with the light axis Ax of the light irradiation unit 100, and the rotation axis 310 of the drive unit 300 is configured to coincide with the light axis Ax of the light irradiation unit 100, when the light path adjustment unit 200 rotates by means of the drive unit 300, the trajectory T2 illuminated by the light can have a curved shape in which the interval between the light path adjustment unit 200 and the center line C of the vehicle in the left and right directions increases as it moves from the side of the vehicle toward the front and rear.

[0121] at this time, Figure 16 and Figure 17 As an example, the optical path adjustment unit 200 is configured to have a second tilt angle θ2 with the optical axis Ax of the light irradiation unit 100 at an angle greater than 45 degrees, and Figure 17 T1 represents the above Figure 15 The trajectory T1 is used to show the trajectory difference based on the tilt angle of the optical path adjustment unit 200.

[0122] When the light path adjustment unit 200 rotates, the trajectory T2 illuminated by the light is made to have a curved shape so that the light illuminating the road surface around the vehicle by means of the light path adjustment unit 200 is not interfered with by the vehicle body. When the light is illuminating the front or rear of the vehicle by means of the light path adjustment unit 200, the possibility of interference by the vehicle body due to light scattering is relatively high. Therefore, the road surface pattern formed in front of or behind the vehicle is formed at a position with a larger distance from the center line C (with the vehicle) in the left-right direction.

[0123] At this time, Figure 17 In this example, the trajectory T2 formed by the light path adjustment unit 200 has a curved shape in which the interval between the trajectory and the center line C of the vehicle in the left-right direction increases as it moves from the side of the vehicle towards the front and rear. However, this is not the only example. When the light path adjustment unit 200 is configured such that the angle between it and the optical axis Ax of the light irradiation unit 100 is less than the first tilt angle θ1, the trajectory T2 is also described. Figure 17 Conversely, the trajectory T2 formed by the optical path adjustment unit 200 can also have a curved shape in which the interval between the vehicle's centerline C and the left-right direction decreases as it moves from the side of the vehicle toward the front and rear.

[0124] That is, depending on the tilt angle of the light path adjustment unit 200, the trajectory of light irradiated by the light path adjustment unit 200 can have a shape parallel to the front-rear direction, or it can have a shape in the left-right direction where the distance between the light path adjustment unit 200 and the center line C of the vehicle changes as the light travels from the side of the vehicle towards the front and rear.

[0125] In the foregoing embodiment, the case in which the trajectory of light irradiated by the light path adjustment unit 200 changes according to the tilt angle of the light path adjustment unit 200 is described as an example. However, it is not limited to this. Not only according to the tilt angle of the light path adjustment unit 200, but also when the angle between the rotation axis 310 of the drive unit 300 and the optical axis Ax of the light irradiation unit 100 (i.e., the tilt angle of the rotation axis 310) changes, the trajectory of light irradiated by the light path adjustment unit 200 can also change.

[0126] Figure 18 This is a schematic diagram showing an optical path adjustment unit and a driving unit according to another embodiment of the present invention. Figure 19 It shows that light is used by Figure 18 A schematic diagram of the trajectory illuminated by the optical path adjustment unit.

[0127] Reference Figure 18 and Figure 19 The optical path adjustment unit 200 is configured to have the same optical axis Ax as the optical irradiation unit 100 as described above. Figure 16In the case where the rotation axis 310 of the drive unit 300 is set to be tilted at a predetermined angle to the optical axis Ax of the light irradiation unit 100 at the same second tilt angle θ2, compared to the case where the optical axis Ax of the light path adjustment unit 200 and the light irradiation unit 100 is set to a first tilt angle θ1, the light irradiates at a position that is further apart from the side of the vehicle. Due to the angle between the rotation axis 310 of the drive unit 300 and the optical axis Ax of the light irradiation unit 100, the trajectory T3 of the light irradiated by the light path adjustment unit 200 can have a shape parallel to the front-rear direction.

[0128] That is, even if the tilt angle of the optical path adjustment unit 200 is the same, the shape of the trajectory of light irradiated by the optical path adjustment unit 200 can change depending on the tilt angle of the rotation axis 310.

[0129] At this time, Figure 18 In this example, the rotating shaft 310 is tilted in the vertical direction with reference to the optical axis Ax of the light irradiation unit 100. However, this is only one example to help understand the present invention and is not limited thereto. Depending on the shape of the trajectory of the light irradiated by the light path adjustment unit 200, the rotating shaft 310 may be tilted in the vertical direction, the front-back direction, the left-right direction or a combination thereof with reference to the optical axis Ax of the light irradiation unit 100.

[0130] also, Figure 19 T1 represents the above. Figure 15 The trajectory T1 is used to represent the difference between the trajectory based on the tilt angle of the optical path adjustment unit 200 and the tilt angle of the rotation axis 310.

[0131] As described above, the lighting device 1 of the present invention can determine the position in which the road surface pattern is formed when the light path adjustment unit 200 rotates by means of at least one of the tilt angle of the light path adjustment unit 200 and the tilt angle of the rotation axis 310. Thus, the road surface pattern can be formed in a position that ensures sufficient visibility for the driver, surrounding vehicles, pedestrians, etc. without interference from the vehicle body.

[0132] Furthermore, when the light irradiation unit 100 includes a display device, the shape distortion of the road surface pattern formed around the vehicle can be prevented by correcting the image formed by the display device.

[0133] That is, in the absence of correction to the image formed by the display device, the further away the light is from the vehicle, the more diffused it becomes, which may lead to distortion of the road surface pattern. Conversely, in the embodiments of the present invention, such as Figure 20 As shown, the image is formed taking into account the distortion of the road surface pattern formed around the vehicle, thereby preventing the distortion of the road surface pattern P formed around the vehicle.

[0134] Furthermore, when the light irradiation unit 100 includes a display device, images can be formed in different directions depending on the type of road surface pattern formed on the road surface around the vehicle.

[0135] For example, in cases where the pavement pattern formed on the road surface around a vehicle includes text, the pavement pattern for pedestrians needs to display text in the front-to-back direction to take into account pedestrian visibility, and the pavement pattern for surrounding vehicles needs to display text in the left-to-right direction to take into account the visibility of drivers of surrounding vehicles.

[0136] Furthermore, in the above embodiments, the optical path adjustment unit 200 is described as an example of a single reflective surface 210, but it is not limited to this, such as... Figure 21 The optical path adjustment unit 200 may also include multiple reflective surfaces 211, 212. In this case, such as Figure 22 Multiple road surface patterns P can also be formed simultaneously on the road surface around the vehicle.

[0137] In the lighting device 1 of the present invention as described above, even when road patterns are formed at different locations on the road surface around the vehicle, the lighting device 1 can be shared without each being equipped with a separate lighting device. Therefore, the configuration can be simplified and the installation space can be reduced. Furthermore, since the position for forming the road pattern can be adjusted by adjusting at least one of the tilt angle of the light path adjustment unit 200 and the tilt angle of the rotation axis 310, interference caused by the vehicle body when forming the road pattern can be prevented.

[0138] Those skilled in the art will understand that this invention can be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as exemplary in all respects, not limiting. The scope of this invention is not limited by the foregoing detailed description, but by the claims. All modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as included within the scope of this invention.

Claims

1. A lighting device, comprising: light irradiation part; The light path adjustment unit adjusts the path of the light irradiated from the light irradiation unit to form a road surface pattern at a predetermined position on the road surface around the vehicle. as well as The drive unit adjusts the position of the optical path adjustment unit to form road surface patterns at different locations on the road surface around the vehicle. The light irradiation unit includes: The light source generates light; The light transmission unit transmits light generated from the light source unit to the light path adjustment unit. The light transmission unit includes: The first lens and the second lens are used to increase the focusing power of the light generated from the light source; and The mirror section reflects and directs the light transmitted through the first lens toward the second lens. In this configuration, the optical axes of the first lens and the second lens are arranged to intersect each other. Compared to the first lens, the effective area of ​​the second lens is smaller.

2. The lighting device according to claim 1, wherein, The light source unit includes multiple light sources. The light irradiation unit further includes: The light synthesis unit synthesizes light generated from the plurality of light sources and directs it to the light transmission unit.

3. The lighting device according to claim 1, wherein, The first lens and the second lens are used to generate light with a different focusing degree than the light generated from the light source.

4. The lighting device according to claim 1, wherein, The light incident on the light transmission unit and the light emitted from the light transmission unit have different directions from each other.

5. The lighting device according to claim 1, wherein, The road surface pattern is formed at positions with different intervals along the side of the vehicle, based on the optical axis of the light irradiation unit and according to the tilt angle of the light path adjustment unit.

6. The lighting device according to claim 1, wherein, The optical path adjustment unit is rotatably connected to the rotation shaft of the drive unit. The road surface pattern is formed at least at one of the sides, front, and rear of the vehicle according to the rotation direction and rotation angle of the optical path adjustment unit.

7. The lighting device according to claim 1, wherein, The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit varies according to at least one of the tilt angle of the light path adjustment unit based on the light axis of the light illuminating unit and the tilt angle of the rotation axis of the drive unit rotatably connected to the light path adjustment unit.

8. The lighting device according to claim 7, wherein, The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit has a shape parallel to the front-to-back direction.

9. The lighting device according to claim 7, wherein, The trajectory of light illuminating the road surface around the vehicle by means of the light path adjustment unit has a shape that varies with the interval between the center line passing through the center of the vehicle in the front-rear direction and the left-right direction as it moves from the side of the vehicle toward the front and rear.

10. The lighting device according to claim 1, wherein, The optical path adjustment unit includes: At least one reflective surface that reflects light irradiated from the light irradiation section.

11. The lighting device according to claim 10, wherein, The tilt angle of at least one reflective surface can be adjusted according to the travel path of the reflected light.

12. The lighting device according to claim 10, wherein The at least one reflective surface includes multiple reflective surfaces whose tilt angle can be adjusted individually.

13. The lighting device according to claim 10, wherein, The at least one reflective surface includes: Multiple reflective surfaces reflect light incident from the light-irradiating part in different directions. The multiple reflective surfaces cause the road surface pattern to be formed simultaneously at different locations on the road surface around the vehicle.

14. The lighting device according to claim 1, further comprising: The outer casing has one open side to accommodate the light irradiation unit, the light path adjustment unit, and the drive unit. The outer casing has a cover on its open side that allows light to pass through, so that light can illuminate the road surface around the vehicle.

15. The lighting device according to claim 14, wherein, One of the light irradiation section and the light path adjustment section is closer to the vehicle body than the other.

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