Lighting device and motor vehicle

Abstract

[Task] A small lighting device switchable between a vertical lighting pattern and a horizontal lighting pattern and a motor vehicle are provided. [Solution] A lighting device comprises a light-emitting part whose length along a first direction differs from the length along a second direction orthogonal to the first direction and which emits light in a third direction orthogonal to the first direction and to the second direction as the principal direction, an imaging lens part arranged on the side of the third direction of the light-emitting part and into which the light is incident, a first mirror arranged on the side of the third direction of the imaging lens part, which has a first reflective surface and which can have a first state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the first direction, and a second state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the second direction, and a second mirror,which is located on the side of the second direction of the first mirror and which has a second reflective surface that can reflect the light reflected by the first reflective surface.

Description

[Technical field]

[0001] The embodiments relate to a lighting device and a motor vehicle. [State of the art]

[0002] To primarily improve motor vehicle safety, devices for drawing on the road surface are being investigated. Various patterns are conceivable for these lighting designs, but if one wants to create both vertical and horizontal lighting patterns as seen from the vehicle, the problem arises that the lighting devices become larger. [Patent literature on the state of the art][Patent literature]

[0003] [Patent Literature 1] JP 2021-079863 A [Brief description of the invention][Problem to be solved by the invention]

[0004] The purpose of the embodiments is to provide a small lighting device and a motor vehicle that is switchable between a vertical lighting pattern and a horizontal lighting pattern. [Means to solve the problem]

[0005] A lighting device according to the embodiments comprises a light-emitting part whose length along a first direction differs from the length along a second direction orthogonal to the first direction and in which light is emitted in a third direction orthogonal to the first direction and to the second direction as the principal direction, an imaging lens part which is arranged on the side of the third direction of the light-emitting part and into which the light is incident, a first mirror which is arranged on the side of the third direction of the imaging lens part, has a first reflective surface and can have a first state in which the light emitted by the imaging lens part can be reflected by the first reflective surface in the first direction, and a second state in which the light emitted by the imaging lens part can be reflected by the first reflective surface in the second direction.and a second mirror, which is arranged on the side of the second direction of the first mirror and has a second reflective surface that can reflect the light reflected by the first reflective surface.

[0006] A motor vehicle according to the embodiments is equipped with a body and a lighting device arranged on the body. The first direction is directed from the lighting device towards a road surface in the vicinity of the body. Light reflected from the first reflective surface of the first mirror and light reflected from the second reflective surface of the second mirror are projected onto the road surface. [Effect of the invention]

[0007] According to the embodiments, a small lighting device switchable between a vertical lighting pattern and a horizontal lighting pattern and a motor vehicle can be realized. [Brief description of the characters] [ Fig. 1] Fig. Figure 1 is a perspective view showing part of the lighting device according to a first embodiment. [ Fig. 2] Fig. Figure 2 is a view to illustrate the first reflective surface in the first embodiment. [ Fig. 3] Fig. Figure 3 is a view showing the first mirror and the drive unit in the first embodiment. [ Fig. 4] Fig. Figure 4 is a top view showing the motor vehicle according to the first embodiment and the road surface in its surroundings. [ Fig. 5A] Fig. 5A is a perspective view showing the operation of the lighting device when the first mirror is in the first state. [ Fig. 5B] Fig. Figure 5B is a top view showing the operation of the lighting device when the first mirror is in the first state. [ Fig. 6A] Fig. Figure 6A is a perspective view showing the operation of the lighting device when the first mirror is in the second state. [ Fig. 6B] Fig. Figure 6B is a front view showing the operation of the lighting device when the first mirror is in the second state. [ Fig. 7] Fig. Figure 7 is a top view showing the operation of the motor vehicle according to the first embodiment. [ Fig. 8] Fig. Figure 8 is a view that shows an example of the lighting pattern formed in the first area. [ Fig. 9] Fig. Figure 9 is a view that shows an example of the lighting pattern formed in the first area. [ Fig. 10] Fig. Figure 10 is a view that shows an example of the lighting pattern formed in the first area. [ Fig. 11] Fig. Figure 11 is a view that shows an example of the lighting pattern formed in the second area. [ Fig. 12] Fig. Figure 12 is a view that shows an example of the lighting pattern formed in the second area. [ Fig. 13] Fig. Figure 13 is a view that shows an example of the lighting pattern formed in the second area. [ Fig. 14] Fig. Figure 14 is a side view showing part of the lighting device according to a second embodiment. [ Fig. 15] Fig. Figure 15 is a view that shows the positional relationship between the first area and the second area in the second embodiment. [ Fig. 16A] Fig. Figure 16A is a view that explains the operation of the first mirror of the lighting device according to a third embodiment. [ Fig. 16B] Fig. Figure 16B is a view that explains the operation of the first mirror of the lighting device according to the third embodiment. [ Fig. 16C] Fig. Figure 16C is a view that explains the operation of the first mirror of the lighting device according to the third embodiment. [ Fig. 17] Fig. Figure 17 is a floor plan illustrating the light emission device according to a specific example. [ Fig. 18] Fig. Figure 18 is a perspective view showing the light emission device according to a specific example. [ Fig. 19] Fig. 19 is a partially enlarged floor plan, which shows the one in Fig. 17 represents area XIX. [Emphasis of the invention]<Erste Ausführungsform>

[0008] First, a lighting device according to the present embodiment will be explained.

[0009] Fig. Figure 1 is a perspective view showing part of the lighting device according to the present embodiment.

[0010] Fig. Figure 2 is a view to illustrate the first reflective surface in the present embodiment.

[0011] Fig. Figure 3 is a view showing the first mirror and the drive unit in the present embodiment.

[0012] Each figure is abstract and appropriately emphasized or simplified. This applies equally to other figures mentioned below.

[0013] As in Fig. As shown in Figure 1, the lighting device 1 according to the present embodiment comprises a light emission device 10, an imaging lens part 20, a first mirror 30 and a second mirror 40. The lighting device 1 may additionally also include a drive part 50.

[0014] The light emission device 10, the imaging lens 20, and the first mirror 30 are arranged sequentially in one direction. For clarity, an orthogonal XYZ coordinate system is assumed in the present embodiment. A direction in which the light emission device 10, the imaging lens 20, and the first mirror 30 are arranged is referred to as the "third direction Z". A direction from the first mirror 30 to the second mirror 40 is referred to as the "second direction Y". The second direction Y is orthogonal to the third direction Z. A direction orthogonal to both the second direction Y and the third direction Z is referred to as the "first direction X".

[0015] The outer shape of the light emission device 10 is that of a substantially rectangular plate. The light emission device 10 has a plurality of light emission elements arranged along the first direction X and the second direction Y. The light emission device 10 can drive a plurality of light emission elements independently and form any desired light emission pattern. The light emission device 10 emits light L0 in the third direction Z as its principal direction. A specific example of the light emission device 10 is explained below.

[0016] The length Dx0 of the light-emitting part of the light-emitting device 10 along the first direction X and the length Dy0 along the second direction Y are different. In the example shown in the present embodiment, the length Dx0 of the light-emitting part of the light-emitting device 10 along the first direction X is shorter than the length Dy0 of the light-emitting part of the light-emitting device 10 along the second direction Y. Thus, Dx0 < Dy0. The aspect ratio of the light-emitting part, i.e., the value of the ratio of length Dy0 to length Dx0, is, for example, 1.5 or more and 4 or less. In the present embodiment, for example, Dx0 : Dy0 = 1 : 4.

[0017] The imaging lens section 20 is arranged on the side of the third direction Z of the light emission device 10, and the light L0 emitted by the light emission device 10 enters it. The imaging lens section 20 is formed from one or more lenses. The light L0 passing through the imaging lens section 20 is imaged after it has traveled a certain distance.

[0018] The first mirror 30 is arranged on the side corresponding to the third direction Z of the imaging lens part 20, and the light L0 emitted by the imaging lens part 20 enters it. The first mirror 30 has a first reflective surface 31. The first reflective surface 31 can reflect the light L0. The first mirror 30 can have a "first state" and a "second state." In the first state, the light L0 emitted by the imaging lens part 20 can be reflected by the first reflective surface 31 in the first direction X. In the second state, the light L0 emitted by the imaging lens part 20 can be reflected by the first reflective surface 31 in the second direction Y.

[0019] As in Fig. 1 and Fig. As shown in Figure 2, the first reflective surface 31 is parallel to the second direction Y and intersects the first direction X and the third direction Z when the first mirror 30 assumes the first state. For example, the first reflective surface 31 is inclined at 45° relative to the first direction X and the third direction Z.

[0020] The first reflective surface 31 is parallel to the first direction X and intersects the second direction Y and the third direction Z when the first mirror 30 assumes the second state. For example, the first reflective surface 31 is inclined at 45° relative to the second direction Y and the third direction Z.

[0021] The first mirror 30 can switch between the first state and the second state by rotating about a first line 32. The first line 32 is contained in the first reflection surface 31_1 when the first mirror 30 is in the first state, and in the first reflection surface 31_2 when the first mirror 30 is in the second state. The first line 32 intersects the first direction X, the second direction Y, and the third direction Z. For example, the angles of the first line 32 to the first direction X, the second direction Y, and the third direction Z are all 45°. Thus, in the orthogonal XYZ coordinate system, the first line 32 extends in the direction of the Miller index

[111] .

[0022] In the following, when the first mirror 30 is in its first state, the light reflected from the first reflective surface 31 in the first direction X is referred to as "light L1 on the first path" and is represented by a dash-dotted line in the figure. Furthermore, when the first mirror 30 is in its second state, the light reflected from the first reflective surface 31 in the second direction Y is referred to as "light L2 on the second path" and is represented by a dash-dotted line in the figure. Additionally, the light L0 before it enters the first mirror 30 is represented by a dashed line in the figure.

[0023] As described above, the first mirror 30 can align the first reflective surface 31 in two directions. In one example, the shape of the first mirror 30 is as shown in Fig. 3 shown, hemispherical and the flat surface of the hemisphere is the first reflective surface 31. A toothed rail 33 is formed on the hemispherical surface of the first mirror 30.

[0024] The drive unit 50 can switch the first mirror 30 between the first and second states. For example, the drive unit 50 is equipped with a stepper motor 51, a rotary axis element 52, and a gear 53. The stepper motor 51 rotates the gear 53 via the rotary axis element 52 by a specific angular amount. The gear 53 is engaged with the toothed rail 33 of the first mirror 30. Consequently, by rotating the gear 53 via the rotary axis element 52, the stepper motor 51 can change the orientation of the first mirror 30 and switch between the first and second states. However, the design of the first mirror 30 and the drive unit 50 is not limited to this example, and it is sufficient if the first and second states described above can be realized.

[0025] As in Fig. As shown in Figure 1, the second mirror 40 is arranged on the side corresponding to the second direction Y of the first mirror 30, and the light L2 reflected by the first reflective surface 31 along the second path is emitted into the second mirror 40 when the first mirror 30 is in the second state. The second mirror 40 has a second reflective surface 41. The second reflective surface 41 can reflect the light L2 reflected by the first reflective surface 31 along the second path. The second reflective surface 41 is, for example, parallel to the third direction Z and intersects the first direction X and the second direction Y.

[0026] In the present embodiment, the second reflective surface 41 can reflect the light L2 reflected by the first reflective surface 31 along a second path in the first direction X. In this case, the second reflective surface 41 is inclined at 45° relative to both the first direction X and the second direction Y. In the present embodiment, the light L1 along the first path and the light L2 along the second path are emitted together in the first direction X. Therefore, the principal emission direction of the lighting device 1 is the first direction X.

[0027] A motor vehicle according to the present embodiment will then be described.

[0028] Fig. Figure 4 is a top view showing a motor vehicle according to the present embodiment and the road surface in its surroundings.

[0029] As in Fig. As shown in Figure 4, the motor vehicle 100, according to the present embodiment, is positioned on the road surface 110 and is either stationary or moving. The road surface 110 is a surface of the road on which the motor vehicle 100 moves and which is substantially level enough for the motor vehicle 100 to move on it. The motor vehicle 100 has a body 101 and a lighting device 1. The lighting device 1 is arranged on the body 101. The first direction X of the lighting device 1 is a direction from the lighting device 1 to the road surface 110 in the vicinity of the body 101.

[0030] In the lighting device 1, the light L1 reflected from the first reflective surface 31, when the first mirror 30 is in the first state, and the light L2 reflected from the second reflective surface 41 of the second mirror 40, when the first mirror 30 is in the second state, are projected onto the road surface 110. The light L1 on the first path and the light L2 on the second path are imaged onto the road surface 110. This allows the lighting device 1 to project the illumination pattern corresponding to the light emission pattern of the light emission device 10 onto the road surface 110.

[0031] In the following explanation, the terms "front," "rear," "right," "left," "above," and "below" all refer to directions as seen by the motor vehicle 100. For example, "front" is a primary direction of travel for the motor vehicle 100, and "rear" is the opposite direction to "front." "Right" and "left" are the directions seen by a driver facing away from the vehicle. "Right" and "left" are collectively referred to as the "sideways." "Below" is the shortest direction from the motor vehicle 100 to the road surface 110, and "above" is the opposite direction to "below."

[0032] For example, the body 101 is equipped with a pair of left and right headlights 102 and a pair of left and right taillights 103. The lighting device 1 is arranged at one or more locations: a pair of front positions 105, located on the outside of the pair of headlights 102 at the front of the body 101; rear positions 106, located between the pair of taillights 103 at the rear of the body 101; and a pair of side positions 107, located on the sides of the body 101. The position at which the lighting device 1 is arranged is not limited to these examples.

[0033] When the lighting device 1 is arranged in the front position 105, the first direction X is directed slightly downwards to the front, and the light L1 on the first path and the light L2 on the second path are projected onto the road surface 110 to the front left or front right of the body 101. When the lighting device 1 is arranged in the rear position 106, the first direction X is directed slightly downwards to the rear, and the light L1 on the first path and the light L2 on the second path are projected onto the road surface 110 behind the body 101. When the lighting device 1 is arranged in the side position 107, the first direction X is directed slightly downwards to the side, and the light L1 on the first path and the light L2 on the second path are projected onto the road surface 110 to the side of the body 101.

[0034] The operation of the lighting device and the motor vehicle according to the present embodiment will then be explained.

[0035] Fig. 5A is a perspective view showing the operation of the lighting device when the first mirror is in the first state.

[0036] Fig. Figure 5B is a top view showing the operation of the lighting device when the first mirror is in the first state.

[0037] Fig. Figure 6A is a perspective view showing the operation of the lighting device when the first mirror is in the second state.

[0038] Fig. Figure 6B is a front view showing the operation of the lighting device when the first mirror is in the second state.

[0039] Fig. Figure 7 is a top view showing the operation of the motor vehicle according to the present embodiment.

[0040] As in Fig. As shown in Figure 1, a light emission pattern can be formed by selectively activating a plurality of light emission elements by the light emission device 10. The largest area in which the light emission pattern is formed is a light emission part of the light emission device 10. As described above, the length Dx0 of the light emission part along the first direction X is shorter than the length Dy0 of the light emission part along the second direction Y. Therefore, the shape of the largest area in which the light emission pattern is formed is rectangular. The following explanation assumes that all light emission elements are switched on.

[0041] The main direction of propagation of the light L0 emitted by the light emission part of the light emission device 10 is the third direction Z. The light L0 emitted by the light emission device 10 passes through the imaging lens part 20 and reaches the first reflective surface 31 of the first mirror 30. The path of the light L0 after reaching the first reflective surface 31 branches depending on whether the first mirror 30 is in the first state or the second state.

[0042] As in Fig. 5A and Fig. As shown in Figure 5B, when the first mirror 30 is in the first state, the light L1 reflected from the first reflective surface 31 travels along the first path in the first direction X and is emitted by the lighting device 1. Regarding the shape of the light beam B1 of the light L1 along the first path, the length Dz1 along the third direction Z is shorter than the length Dy1 along the second direction Y. Thus, Dz1 < Dy1. The shape of such a light beam is called "vertical". "The shape of the light beam" refers to the shape of the region in which the light intensity in a plane orthogonal to the main direction of travel of the light exceeds a certain value. For example, this is the region with an intensity of 10% or more of the maximum intensity. Fig. 1 and Fig. For clarity, in 5A the light beam B1 is shown in a position offset from the light L1 on the first path.

[0043] As in Fig. 6A and Fig. As shown in Figure 6B, when the first mirror 30 is in the second state, the light L2 reflected from the first reflective surface 31 travels along the second path in the second direction Y and reaches the second reflective surface 41 of the second mirror 40. The light L2 is then reflected along the second path from the second reflective surface 41 in the first direction X and emitted by the lighting device 1. Regarding the shape of the light beam B2 of the light L2 along the second path, the length Dz2 along the third direction Z is longer than the length Dy2 along the second direction Y. Therefore, Dz2 > Dy2. The shape of such a light beam is described as "horizontal". Fig. 1 and Fig. For clarity, in 6A the light beam B2 is shown in a position offset from the light L2 on the second path.

[0044] As in Fig. As shown in Figure 7, when the first mirror 30 is in the first state, the shape of the light beam B1 of light L1 reflected at the first reflective surface 31 is vertical, and the light L1 on the first path is emitted into a first area R1 of the road surface 110. When the first mirror 30 is in the second state, the shape of the light beam B2 of light L2 reflected at the second reflective surface 41 is horizontal, and the light L2 on the second path is emitted into a second area R2 of the road surface 110. The second area R2 does not coincide with the first area R1.

[0045] The first area R1 is relatively vertical as viewed from the vehicle 100, and the second area R2 is relatively horizontal as viewed from the vehicle 100. A portion of the first area R1 and a portion of the second area R2 may overlap, and the first area R1 and the second area R2 may be spaced apart from each other, but the first area R1 and the second area R2 do not coincide completely. The illumination pattern corresponding to the light emission pattern of the light emission device 10 is drawn on the first area R1 and the second area R2.

[0046] The lighting pattern can be a still image or a moving image. Furthermore, it can be a monochrome pattern, a multicolored pattern, or a solid-color pattern.

[0047] Fig. 8 to Fig. Figure 10 shows an example of the lighting pattern formed in the first area.

[0048] The in Fig. 8 to Fig. The 10 lighting patterns shown are all monochrome moving images.

[0049] In Fig. 8 to Fig. Figure 10 shows the lighting pattern drawn in the first area R1 in time series. That is, over time the lighting pattern changes from the leftmost pattern shown to the rightmost pattern. More specifically, after drawing the leftmost lighting pattern shown, the second lighting pattern from the left is drawn, and then the third lighting pattern from the left is drawn. In each figure, the bright areas are shown in white and the dark areas in gray. This is Fig. 11 to Fig. 13 equal.

[0050] At the in Fig. In the lighting pattern shown in 8, a cycle is repeated in which, from a position near the motor vehicle 100 in the first area R1 to a position at a greater distance, arrow-shaped lighting sections P1 are switched on successively, and after they have been switched on in all positions, they are switched off in the entire first area R1.

[0051] At the in Fig. In the lighting pattern shown in Figure 9, a cycle is repeated in which vertical rectangular lighting sections P2 are continuously switched on from a position near the motor vehicle 100 in the first area R1 to a position at a greater distance, and after they have been switched on over the entire length of the first area R1, they are continuously switched off from a position near the motor vehicle 100 to a position at a greater distance and thus switched off over the entire length of the first area R1.

[0052] In Fig. 10. The lighting pattern in the top left corner is drawn, then the process moves sequentially to the lighting pattern to its right until the top right lighting pattern is drawn, then the bottom left lighting pattern is drawn, and finally the process moves sequentially to the lighting pattern on the right. In the Fig. In the 10 illustrated lighting patterns, a cycle is repeated in which a multitude of arrow-shaped lighting sections P3 move incrementally larger from a position near the motor vehicle 100 in the first area R1 to a position at a greater distance.

[0053] When the lighting device 1 is arranged in the front position 105, the in Fig. 8 to Fig. The 10 depicted lighting patterns are projected onto the road surface from the left or right of the vehicle 100. For example, if the vehicle 100 intends to change direction, these lighting patterns are activated along with the turn signals, warning other vehicles in the vicinity.

[0054] Fig. 11 to Fig. Figure 13 shows an example of the lighting pattern formed in the second area.

[0055] The in Fig. The lighting pattern shown in Figure 11 is a monochrome still image. Lighting device 1 displays the lighting section P4 in the second area R2, which represents the string "CAUTION". The displayed strings are not limited to this; strings used to warn other motor vehicles or pedestrians, or for communication with them, can also be displayed. With a large number of displayed characters, a dynamic display flowing from left to right is also possible.

[0056] The in Fig. 12 and Fig. The 13 lighting patterns shown are a monochrome moving image. Fig. 12 and Fig. 13 The lighting pattern changes over time from the lower pattern shown to the upper pattern.

[0057] At the in Fig. In the 12 illustrated lighting patterns, a cycle is repeated in which a trapezoidal lighting section P5 increases from a position near the motor vehicle 100 to a position at a greater distance in the second area R2 and finally goes out.

[0058] At the in Fig. In the 13 illustrated lighting patterns, a cycle is repeated in which a rectangular lighting section P6 extends from the center of the second area R2 to the left and right, spreads over the entire second area R2, and then goes out from the center of the second area R2 to the left and right.

[0059] If the lighting device 1 is arranged in the rear position 106, the following will be Fig. 11 to Fig. The 13 illustrated lighting patterns are, for example, projected onto the road surface behind the motor vehicle 100 and serve to warn pedestrians, etc., when the motor vehicle 100 intends to reverse.

[0060] The lighting patterns formed on the road surface are not limited to the examples described above. If the lighting device 1 is arranged at the front position 105, a warning for the driver of the motor vehicle 100 can also be displayed in the horizontal second area R2. An example of such a warning could be an icy road surface. Furthermore, if the lighting device 1 is arranged at the rear position 106, a warning for the following motor vehicle can be displayed in the vertical first area R1. Finally, if the lighting device 1 is arranged at the side positions 107, the entire horizontal second area R2 can be illuminated when people are getting in and out of the motor vehicle 100, thus improving the visibility of the foot area.When opening the door of vehicle 100, a lighting pattern can also be displayed to warn the following vehicle.

[0061] In the Fig. 8 to Fig. In the 13 examples shown, the light areas are depicted in white and the dark areas in gray, but this relationship can also be reversed. That is, the areas shown in the Fig. 8 to Fig. The 13 white areas can be displayed as dark, and the gray areas as light. Lighting patterns with varying brightness and colors can also be present between the white and gray areas.

[0062] The advantages of the present embodiments are then explained. According to the present embodiment, by shaping the light-emitting part of the light-emitting device 10 with an aspect ratio greater than 1, an illumination pattern can be formed in the vertical first region R1 by bringing the first mirror 30 into the first state, and an illumination pattern can be formed in the horizontal second region R2 by bringing the first mirror 30 into the second state. Therefore, the shape of the light-emitting part can be used, and both vertical and horizontal illumination patterns can be formed, without excessively enlarging the light-emitting part of the light-emitting device 10.As a result, according to the present embodiment, a small lighting device switchable between a vertical lighting pattern and a horizontal lighting pattern and a motor vehicle with this lighting device are realized.

[0063] The "illumination patterns" formed by the lighting device 1 on the road surface 110 are "images" perceived by the observer through sight. If the observer is located outside the motor vehicle 100 and the illumination pattern is formed between the motor vehicle 100 and the observer, a vertical illumination pattern is perceived by the observer as a vertical image, and a horizontal illumination pattern is perceived by the observer as a horizontal image. Furthermore, if the observer is located inside the motor vehicle 100, for example, if the observer is the driver, a vertical illumination pattern is perceived by the observer as a vertical image, and a horizontal illumination pattern is perceived by the observer as a horizontal image.

[0064] Furthermore, in the lighting device 1 according to the present embodiment, no moving parts are provided other than the drive unit 50 and the first mirror 30. Therefore, the switching times of the lighting pattern can be reduced. In addition, the cost of the lighting device 1 can be lowered, its size reduced, and its reliability improved, since the design of the lighting device 1 can be simplified.

[0065] In the present embodiment, an example is shown in which the shape of the light-emitting part of the light-emitting device 10 is rectangular, the cross-sectional shape of the light beams B1 and B2 is rectangular, corresponding to this rectangular shape, and the shape of the first region R1 and the second region R2 is a trapezoidal shape projected onto the road surface 110, reflecting the cross-sectional shape of the light beams B1 and B2, but this is not the only possible configuration. The light-emitting part of the light-emitting device 10 can have any shape. Alternatively, by selectively activating light-emitting elements contained in the light-emitting device 10, an area of ​​any shape can be illuminated.In this case too, if the length of the light emission part along the first direction X and the length of the light emission part along the second direction are different, the first mirror 30 can be switched between the first state and the second state, thereby switching the lighting pattern projected onto the road surface 110 between vertical and horizontal.

[0066] Furthermore, in the present embodiment an example is shown in which the length Dy0 of the light emission part along the second direction Y is longer than the length Dx0 of the light emission part along the first direction X, but the length Dx0 of the light emission part along the first direction X can also be longer than the length Dy0 along the second direction Y. <Zweite Ausführungsform>

[0067] Fig. Figure 14 is a side view showing part of the lighting device according to the present embodiment.

[0068] Fig. Figure 15 is a view showing the positional relationship between the first area and the second area in the present embodiment.

[0069] In Fig. Figure 14 omits the illustration of the light emission device 10 and the imaging lens part 20.

[0070] As in Fig. As shown in Figure 14, the angle of the second reflective surface 41 of the second mirror 40 in the lighting device 2 according to the present embodiment differs from that of the lighting device 1 according to the first embodiment. In the lighting device 2, the angle θ, which is the sum of the angles of incidence of the light L2 incident on the second reflective surface 41 and the angles of reflection of the light L2 reflected by the second reflective surface 41 on the second path, is greater than 90°. This allows the second reflective surface 41 to reflect the light L2 reflected by the first reflective surface 31 of the first mirror 30 on the second path in a direction between the first direction X and the second direction Y. The angle θ can also be less than 90°.In this case, the light L2 can be reflected on the second path in the direction between the first direction X and the opposite direction (-Y) of the second direction Y.

[0071] As in Fig. As shown in Figure 15, the second region R2, viewed from vehicle 100, is located in front of the first region R1 when the angle θ is greater than θ1. When the angle θ is greater than θ2, the second region R2, viewed from vehicle 100, overlaps the leading edge of the first region R1. When the angle θ is greater than θ3, the second region R2, viewed from vehicle 100, overlaps the middle part of the first region R1.

[0072] In this way, by increasing the angle θ, the position of the second area R2 relative to the first area R1 can be increased. This allows the positional relationship between the first area R1 and the second area R2 to be determined by selecting the angle θ. Consequently, if, for example, a warning for the driver of the vehicle 100 is displayed in the second area R2 in front of the vehicle 100, the second area R2 can be avoided being hidden in the shadow of the vehicle 100 from the driver's perspective. Other constructions, operations, and effects in the present embodiment, beyond those mentioned above, are the same as in the first embodiment. <Dritte Ausführungsform>

[0073] Fig. 16A to Fig. Figure 16C shows views that illustrate the operation of the first mirror of the lighting device according to the present embodiment. As shown in Fig. 16A to Fig. As shown in Figure 16C, the lighting device 3 according to the present embodiment differs from the lighting device 1 according to the first embodiment in that it has a 2-axis drive for the first mirror.

[0074] As in Fig. 16A to Fig. As shown in Figure 16C, the first reflective surface 31a of the first mirror 30a of the lighting device 3 is rectangular. In the present embodiment, the first reflective surface 31a, when the first mirror 30a is in the first state, is referred to as "first reflective surface 31a_1", the first reflective surface 31a, when the first mirror 30a is in the second state, is referred to as "first reflective surface 31a_2", and the first reflective surface 31a, when the first mirror 30a is in the intermediate state, is referred to as "first reflective surface 31a_3".

[0075] The following describes the case where the first mirror 30a is moved from the first state to the second state.

[0076] As in Fig. As shown in Figure 16A, the first mirror 30a, which is in the first state, is rotated about a second line 34. This places the first mirror 30a into the intermediate state. In the intermediate state, the first reflecting surface 31a_3 coincides with a pair of corners that are opposite each other with respect to the first reflecting surface 31a_2 in the second state, but the direction in which the normal extends is different.

[0077] Then, as in Fig. As shown in Figure 16B, the first mirror 30a is rotated in its intermediate state about a third straight line 35. The third straight line 35 is a straight line connecting a pair of corners of the first reflective surface 31a_3 described above. This results in, as shown in Fig. As shown in Figure 16C, the first mirror 30a is moved into the second state. As a result, the first reflecting surface 31a moves to the position of the first reflecting surface 31a_2.

[0078] To move the first mirror 30a from the second state to the first state, the first mirror 30a can be rotated around the third straight line 35 and then around the second straight line 34.

[0079] According to the present embodiment, not only the orientation of the first reflective surface 31a, but also the position of the outer edge of the first reflective surface 31a can be controlled. The second line 34 can be contained within the first reflective surface 31a_1 in the first state, and the third line 35 can be contained within the first reflective surface 31a_2 in the second state, but they are not limited to this. The second line 34 can intersect the first reflective surface 31a_1, and the third line 35 can intersect the first reflective surface 31a_2. Other constructions, operations, and effects in the present embodiment, besides those mentioned above, are the same as in the first embodiment. <Konkretes Beispiel der Lichtemissionsvorrichtung>

[0080] A specific example of the light emission device 10 will then be explained.

[0081] Fig. Figure 17 is a floor plan illustrating the light emission device according to the present specific example.

[0082] Fig. Figure 18 is a perspective view showing the light emission device according to the present specific example.

[0083] Fig. 19 is a partially enlarged floor plan, which shows the one in Fig. 17 represents area XIX.

[0084] As in Fig. As shown in Figures 17 to 19, a component substrate 230 is provided in the light emission device 10 according to the present specific example. A wiring substrate 210 is arranged on one upper surface of the component substrate 230. The wiring substrate 210 is, for example, a substrate with wiring inside and on the surface of an insulating substrate, e.g., an ASIC substrate (Application Specific Integrated Circuit). A control element 211 is formed in the wiring substrate 210.

[0085] A light-emitting element 219 is arranged on a portion of the upper surface of the wiring substrate 210. In plan view, the shape of the light-emitting element 219 is, for example, rectangular. As described above, the length Dx0 of the light-emitting element 219 in the first direction X is shorter than the length Dy0 in the second direction Y.

[0086] A large number of light-emitting elements 220 are arranged, for example, in a matrix within the light-emitting part 219. In one example, the light-emitting element 220 is arranged in a matrix with 256 elements along the longitudinal direction (second direction Y) and with 64 elements along the transverse direction (first direction X) of the light-emitting part 219. In this case, 16,384 light-emitting elements 220 are arranged in the light-emitting device 10.

[0087] A frame-like resin 240 is provided on the building block substrate 230 and the wiring substrate 210 such that it surrounds the light-emitting part 219. Wires 241 can be arranged within the resin 240, connecting the terminals of the building block substrate 230 to the terminals of the wiring substrate 210. Furthermore, wavelength converter elements can be arranged on a plurality of light-emitting elements 220 within the light-emitting part 219. The wavelength converter elements have, for example, the form of plates or sheets and contain, for example, a fluorescent substance. In the case that wavelength converter elements, etc., are arranged on the light-emitting elements 220, Fig. Figure 19 shows a transparent view of the wavelength converter elements, etc.

[0088] As in Fig.As shown in Figure 19, the light emission element 220 has a rectangular shape in plan view. The light emission element 220 is, for example, a light-emitting diode (LED). If, in the plan view, the spacing of the light emission elements 220 of the light emission part 219 in the transverse direction (first direction X) is denoted as Px and the spacing of the light emission elements 220 of the light emission part 219 in the longitudinal direction (second direction Y) is denoted as Py, then the distance d1 between the centers of adjacent light emission elements 220 in the first direction X is Px, the distance d2 between the centers of adjacent light emission elements 220 in the second direction Y is Py, and the distance d3 between the centers of adjacent light emission elements 220 in the diagonal direction is represented by the formula d3 = √ (Px2 + Py2).

[0089] More generally, the distance dab between the center point of one light-emitting element 220 and the center point of another light-emitting element 220, located a units away in the first direction X and b units away in the second direction Y, is represented by the formula dab = √[(a X Px)² + (b X Py)²]. If, in plan view, the shape of the light-emitting element 220 is rectangular, then the center point of the light-emitting element 220 is the intersection of the diagonals of the outer edge of the light-emitting element 220. In an example, the arrangement distances Px and Py are both 50 µm.

[0090] In the light emission device 10, the control unit 211 controls the light emission of a plurality of light emission elements 220 based on an external signal. For example, the control unit 211 controls the light emission elements 220 on a time-sharing basis in 256 gradations. The control unit 211 can control the light emission elements 220 individually. The control unit 211 can control the light emission of each individual light emission element 220 by controlling the current supplied to each light emission element 220. In this way, by controlling the gradation of light emission of each of the plurality of light emission elements 220, the control unit 211 can achieve different light emission patterns across the entire plurality of light emission elements 220. However, the design of the light emission device 10 is not limited to this specific example.

[0091] The aforementioned individual embodiments and the specific example are examples of the embodiment of the invention, and the present invention is not limited to these embodiments and the specific example. The aforementioned individual embodiments and the specific example also include, for example, those in the present invention in which some components or processes are added, omitted, or modified. Furthermore, the embodiments described above can be combined.

[0092] The present invention comprises the following embodiments. (Addendum 1)

[0093] Lighting device, comprising: a light emission component whose length along a first direction differs from the length along a second direction orthogonal to the first direction and which emits light in a third direction orthogonal to the first direction and to the second direction as the main direction, an imaging lens part that is arranged on the side of the third direction of the light emission part and into which the light falls, a first mirror, which is arranged on the side of the third direction of the imaging lens part, has a first reflective surface and can have a first state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the first direction, and a second state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the second direction, and a second mirror located on the side of the second direction of the first mirror, and having a second reflective surface capable of reflecting the light reflected from the first reflective surface. (Addendum 2)

[0094] Lighting device according to Annex 1, wherein the second reflective surface is parallel to the third direction and intersects the first direction and the second direction. (Addendum 3)

[0095] Lighting device according to addition 1 or 2, wherein the second reflective surface can reflect the light reflected from the first reflective surface in the first direction. (Addendum 4)

[0096] Lighting device according to addition 1 or 2, wherein the second reflective surface can reflect the light reflected from the first reflective surface in a direction between the first direction and the second direction. (Addendum 5)

[0097] Lighting device according to one of the additions 1 to 4, wherein the first reflective surface is parallel to the second direction and intersects the first direction and the third direction when the first mirror is in the first state. (Addendum 6)

[0098] Lighting device according to one of the additions 1 to 5, wherein the first reflective surface is parallel to the first direction and intersects the second direction and the third direction when the first mirror is in the second state. (Addendum 7)

[0099] Lighting device according to one of the additions 1 to 6, wherein the first mirror can switch between the first state and the second state by rotation about a first straight line and wherein the first straight line is contained in the first reflective surface when the first mirror is in the first state, and it is contained in the first reflective surface when the first mirror is in the second state, and it intersects the first direction, the second direction and the third direction. (Addendum 8)

[0100] Lighting device according to one of the additions 1 to 6, wherein the first mirror can switch between the first state and the second state by rotation about a second straight line and rotation about a third straight line. (Addendum 9)

[0101] Lighting device according to one of the additions 1 to 8, further comprising a drive part that switches the first mirror between the first state and the second state. (Addendum 10)

[0102] Lighting device according to one of the additions 1 to 9, wherein a length of the light emission part along the first direction is shorter than a length of the light emission part along the second direction. (Addendum 11)

[0103] Lighting device according to one of the additions 1 to 10, wherein the light emission part has a plurality of light emission elements arranged along the first direction and the second direction. (Addendum 12)

[0104] Motor vehicle, including: a bodywork and a lighting device according to one of the supplements 1 to 11, which is arranged on the bodywork, where the first direction is a direction from the lighting device to a road surface in the vicinity of the bodywork and wherein a light reflected from the first reflective surface of the first mirror and a light reflected from the second reflective surface of the second mirror are projected onto the road surface. (Addendum 13)

[0105] Motor vehicle according to Supplement 12, wherein the light reflected at the first reflective surface in the first state of the first mirror is directed onto a first area of ​​the road surface and the light reflected from the second reflective surface in the second state of the first mirror is directed onto a second area that does not correspond to the first area of ​​the road surface. [List of reference symbols] 1, 2, 3 Lighting device 10 Light emission device 20 Imaging lens part 30 First Mirror 31, 31_1, 31_2, 31a, 31a_1, 31a_2, 31a_3 First reflection surface 32 First Straight 33 Dental splint 34 Second Straight 35 Third Straight 40 Second Mirror 41 Second reflective surface 50 Drive unit 51 Stepper motor 52 Rotary axis element 53 gear 100 motor vehicles 101 Bodywork 102 headlights 103 Rear light 105 Front position 106 Back position 107 Side position 110 road surface 210 Wiring substrate 211 Control unit 219 Light emission section 220 light emission element 230 building block substrate 240 Harz 241 wire B1 Light beam of light L1 on the first path B2 Light beam of light L2 on the second path d1, d2, d3, dab distance Dx0 Length of the light emission part along the first direction X Dy0 Length of the light emission part along the second direction Y Dy1 Length of the light beam of light L1 on the first path along the second direction Y Dz1 Length of the light beam of light L1 on the first path along the third direction Z Dy2 Length of the light beam of light L2 on the second path along the second direction Y Dz2 Length of the light beam of light L2 on the second path along the third direction Z L0 light L1 light on the first path L2 light on the second path P1 to P6 lighting section Px, Py arrangement spacing R1 First Area R2 Second Area X First direction Y Second direction Third direction θ angle QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2021-079863 A

[0003]

Claims

[1] Lighting device comprising: a light emission component whose length along a first direction differs from the length along a second direction orthogonal to the first direction and which emits light in a third direction orthogonal to the first direction and to the second direction as the main direction, an imaging lens part that is arranged on the side of the third direction of the light emission part and into which the light falls, a first mirror, which is arranged on the side of the third direction of the imaging lens part, has a first reflective surface and can have a first state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the first direction, and a second state in which the light emitted by the imaging lens part can be reflected from the first reflective surface in the second direction, and a second mirror located on the side of the second direction of the first mirror, and having a second reflective surface capable of reflecting the light reflected from the first reflective surface. [2] Lighting device according to claim 1, wherein the second reflective surface is parallel to the third direction and intersects the first direction and the second direction. [3] Lighting device according to claim 1 or 2, wherein the second reflective surface can reflect the light reflected from the first reflective surface in the first direction. [4] Lighting device according to claim 1 or 2, wherein the second reflective surface can reflect the light reflected from the first reflective surface in a direction between the first direction and the second direction. [5] Lighting device according to any one of claims 1 to 4, wherein the first reflective surface is parallel to the second direction and intersects the first direction and the third direction when the first mirror is in the first state. [6] Lighting device according to any one of claims 1 to 5, wherein the first reflective surface is parallel to the first direction and intersects the second direction and the third direction when the first mirror is in the second state. [7] Lighting device according to any one of claims 1 to 6, wherein the first mirror can switch between the first state and the second state by rotation about a first straight line and wherein the first straight line is contained in the first reflective surface when the first mirror is in the first state, and it is contained in the first reflective surface when the first mirror is in the second state, and it intersects the first direction, the second direction and the third direction. [8] Lighting device according to one of claims 1 to 6, wherein the first mirror can switch between the first state and the second state by rotation about a second straight line and by rotation about a third straight line. [9] Lighting device according to any one of claims 1 to 8, further comprising a drive part that switches the first mirror between the first state and the second state. [10] Lighting device according to any one of claims 1 to 9, wherein the length of the light emission part along the first direction is shorter than the length of the light emission part along the second direction. [11] Lighting device according to any one of claims 1 to 10, wherein the light emission part has a plurality of light emission elements arranged along the first direction and the second direction. [12] Motor vehicle, comprising: a bodywork and a lighting device according to any one of claims 1 to 11, which is arranged on the bodywork, where the first direction is a direction from the lighting device to a road surface in the vicinity of the bodywork and wherein a light which is reflected at the first reflective surface of the first mirror, and a light that is reflected at the second reflective surface of the second mirror, be blasted onto the road surface. [13] Motor vehicle according to claim 12, wherein the light reflected at the first reflective surface in the first state of the first mirror is radiated onto a first area of ​​the road surface and the light reflected at the second reflective surface in the second state of the first mirror is radiated onto a second area which does not correspond to the first area of ​​the road surface.

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