Vehicle lamp

Abstract

A vehicle lamp (100) includes: a light guide unit (110); a plurality of first light emitting units (120) arranged along a first end face of the light guide unit, each including a first light source (122) that emits light in a first color and a second light source (124) that emits light in a second color different from the first color; and a controller (140) that controls the plurality of first light emitting units.

Description

Technical Field

[0001] The present disclosure relates to a vehicle lamp used for vehicles such as automobiles. Background Art

[0002] As a light source for vehicle lamps, the adoption of semiconductor light sources such as light-emitting diodes or semiconductor lasers is being promoted in place of existing electric bulbs such as incandescent bulbs. Such semiconductor light sources have many advantages such as design diversity and power saving brought about by the combination with a light guide body compared with electric bulbs.

[0003] In particular, in recent years, for vehicle lamps, in addition to the functions required for the running of an automobile, functions for increasing the added value of the automobile such as courtesy lights are also required.

[0004] [Prior Art Documents]

[0005] [Patent Documents]

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-92753 Summary of the Invention

[0007] [Problems to be Solved by the Invention]

[0008] The present disclosure has been made in view of the above circumstances, and one exemplary object of one aspect thereof is to provide a vehicle lamp capable of switching the color to be emitted and controlling the size and position of the light-emitting portion.

[0009] [Technical Solution for Solving the Technical Problem]

[0010] One aspect of the present disclosure relates to a vehicle lamp. The vehicle lamp includes: a light guide unit; a plurality of first light-emitting units arranged along a first end face of the light guide unit, each including a first light source that emits light of a first color and a second light source that emits light of a second color different from the first color; and a controller that controls the plurality of first light-emitting units.

[0011] In addition, any combination of the above components, and the result of mutual conversion of the components or expressions of the present disclosure between methods, devices, systems, etc. are also effective as aspects of the present disclosure.

[0012] Advantages of the Invention

[0013] According to one aspect of the present disclosure, it is possible to switch the color to be emitted and control the position and size of the light-emitting portion. Brief Description of the Drawings

[0014] Figure 1 It is a diagram showing a vehicle lamp according to an embodiment.

[0015] Figure 2 (a) to Figure 2 (d) of the figure is an exemplary light emission scheme diagram of a vehicle lamp.

[0016] Figure 3 (a) of Figure 3 (b) of the figure is a diagram for explaining a transition example of the lighting pattern of a vehicle lamp.

[0017] Figure 4 (a) of Figure 4 (b) is Figure 3 (a) of Figure 3 (b) is a timing diagram corresponding to the transition.

[0018] Figure 5 (a) of Figure 5 (b) of the figure is a diagram for explaining the movement of the light emission area in the Y direction.

[0019] Figure 6 (a) of Figure 6 (b) is Figure 5 (a) of Figure 5 (b) is a timing diagram corresponding to the transition.

[0020] Figure 7 The figure is an example showing the transition from the light emission state of the first color to the light emission state of the second color.

[0021] Figure 8 is Figure 7 a timing diagram corresponding to the transition.

[0022] Figure 9 The figure is a diagram showing a front grille equipped with a vehicle lamp.

[0023] Figure 10 The figure is a diagram showing a vehicle lamp of Embodiment 2.

[0024] Figure 11 The figure is a cross-sectional view of a vehicle lamp.

[0025] Figure 12 The figure is a diagram showing a vehicle lamp of Embodiment 3.

[0026] Figure 13 The figure is a diagram showing a headlamp equipped with a vehicle lamp.

[0027] Figure 14 The figure is a diagram showing a rear combination lamp equipped with a vehicle lamp. Detailed Embodiment

[0028] (Summary of the Embodiment)

[0029] Hereinafter, a summary of some exemplary embodiments of the present disclosure will be described. This summary is a prelude to the detailed description below and is for the purpose of providing a basic understanding of the embodiments. It simplifies the description of some concepts in one or more embodiments and does not limit the scope of the invention or the disclosure. In addition, this summary is not an all-inclusive summary of all conceivable embodiments and does not limit the essential elements of the embodiments. For convenience, "one embodiment" is sometimes used to refer to one embodiment (example and variation) or multiple embodiments (example and variation) disclosed in this specification.

[0030] A vehicle lamp according to one embodiment includes: a light guide unit; a plurality of first light emitting units arranged along a first end face of the light guide unit, each of which includes a first light source that emits light of a first color and a second light source that emits light of a second color different from the first color; and a controller that controls the plurality of first light emitting units.

[0031] According to this configuration, it is possible to switch the color to be emitted and control the size and position of the light emitting portion of the light guide unit.

[0032] In one embodiment, the vehicle lamp may further include a plurality of second light emitting units arranged along a second end face opposite to the first end face of the light guide unit, each of which includes a third light source that emits light of the first color and a fourth light source that emits light of the second color. Thus, unevenness in brightness can be reduced with respect to the light guiding direction. In addition, with respect to the light guiding direction, the position and size of the light emitting portion can be controlled.

[0033] In one embodiment, the light guide unit may include a plurality of light guides corresponding to the plurality of first light emitting units and the plurality of second light emitting units, and each extends from one corresponding to the plurality of first light emitting units to one corresponding to the plurality of second light emitting units. Thus, for each "pair" of the first light emitting unit and the second light emitting unit, light can be confined in the light guide, and the boundary of the light emitting portion of each light emitting unit pair can be made clear.

[0034] In one embodiment, a plurality of discrete steps may be formed on the plurality of light guides in a direction perpendicular to their extending direction. Thus, a plurality of light emitting portions can be arranged in a matrix.

[0035] In one embodiment, the light guide unit may be a single light guide panel. Alternatively, on the first end face of the light guide panel, a collimating optical system provided for each first light emitting unit may be provided or formed, and on the second end face of the light guide panel, a collimating optical system provided for each second light emitting unit may be provided or formed.

[0036] In one embodiment, it is also possible that, in the light guide panel, a plurality of discrete steps are formed with respect to the light waveguide direction of light. Further, it is also possible that the plurality of steps are formed discretely in relation to the arrangement direction of the plurality of first light emitting units.

[0037] In one embodiment, it is also possible that the controller (i) causes the first light source to emit light among the plurality of first light emitting units and causes the third light source to emit light among the plurality of second light emitting units, (ii) among the plurality of first light emitting units, causes the second light source to gradually increase in light intensity over time while causing the first light source to gradually decrease in light intensity over time, and (iii) among the plurality of second light emitting units, causes the fourth light source to gradually increase in light intensity over time while causing the third light source to gradually decrease in light intensity over time.

[0038] Thereby, when switching from the light emitting state of the first color to the light emitting state of the second color, it can change over time along the light waveguide direction of light.

[0039] In one embodiment, it is also possible that one of the first color and the second color is cyan. Thereby, it can be used as a lamp indicating autonomous driving.

[0040] In one embodiment, it is also possible that one of the first color and the second color is white. Thereby, it can be utilized as a DRL (Daytime Running Lamp) or a position lamp (outline lamp), or a hospitality lamp.

[0041] In one embodiment, one of the first color and the second color can be either red or amber. Thereby, it can be utilized as a stop lamp or a turn signal lamp.

[0042] In one embodiment, it is also possible that the vehicle lamp is mounted on the front grille of the vehicle. Further, it is also possible that the vehicle lamp is mounted on the headlamp or the rear combination lamp. Further, it is also possible that the vehicle lamp is an interior lamp.

[0043] (Embodiment)

[0044] Hereinafter, the present disclosure will be described based on preferred embodiments with reference to the drawings. The same or equivalent components, members, and processes shown in the respective drawings are denoted by the same reference numerals, and repeated explanations are appropriately omitted. In addition, the embodiments do not limit the disclosure, but are merely illustrative, and not all the features and combinations thereof described in the embodiments are the essential contents of the disclosure.

[0045] (Embodiment 1)

[0046] Figure 1FIG. 0 is a diagram of a vehicle lamp 100 showing an embodiment. The vehicle lamp 100 includes a light guide unit 110, a plurality (N) of first light emitting units 120_1 to 120_N, a plurality (N) of second light emitting units 130_1 to 130_N, and a controller 140.

[0047] The plurality of first light emitting units 120_1 to 120_N are arranged along a first end face S1 of the light guide unit 110. The first light emitting unit 120 includes: a first light source 122 that emits light of a first color; and a second light source 124 that emits light of a second color different from the first color. The first light source 122 and the second light source 124 can use semiconductor light emitting elements such as LEDs (light emitting diodes), LDs (laser diodes), and organic ELs (Electro Luminescence). In addition to the first light source 122 and the second light source 124, the first light emitting unit 120 further includes their lighting circuits (driving circuits). The configuration of the lighting circuit can be designed according to the type of the light source.

[0048] The plurality of second light emitting units 130_1 to 130_N are arranged in the X direction along a second end face S2 opposite to the first end face S1 of the light guide unit 110. The second light emitting unit 130 is the same as the first light emitting unit 120 and includes a third light source 132 that emits light of the first color and a fourth light source 134 that emits light of the second color.

[0049] Each first light emitting unit 120 is positioned such that the emitted light L1, L2 of the first light source 122 and the second light source 124 enters the first end face S1 of the light guide unit 110. Similarly, each second light emitting unit 130 is positioned such that the emitted light L3, L4 of the third light source 132 and the fourth light source 134 enters the second end face S2 of the light guide unit 110.

[0050] The emitted light L1, L2 of the first light source 122 and the second light source 124 of the first light emitting unit 120 are guided in the light guide unit 110 in a direction (Y direction) substantially perpendicular to the first end face S1. The emitted light L3, L4 of the third light source 132 and the fourth light source 134 of the second light emitting unit 130 are guided in the light guide unit 110 in a direction (Y direction) substantially perpendicular to the second end face S2, in a direction opposite to the light L1, L2.

[0051] The first color and the second color are not particularly limited and can be determined according to the use of the vehicle lamp 100. For example, the first color may be white and the second color may be cyan. In the present embodiment, the first light source 122 and the second light source 124 in the first light emitting unit 120 are lit complementarily, and similarly, the third light source 132 and the fourth light source 134 in the second light emitting unit 130 are lit complementarily.

[0052] The controller 140 controls a plurality of first light emitting units 120_1 to 120_N and a plurality of second light emitting units 130_1 to 130_N. Specifically, the controller 140 is configured to be able to independently control the turning on, turning off, and light quantity of a plurality of light sources 122, 124, 132, 134.

[0053] In the present embodiment, the light guide unit 110 includes N light guides 112_1 to 112_N. The N light guides 112_1 to 112_N correspond to the N first light emitting units 120 and the second light emitting units 130. The i-th light guide 112_i guides the emitted light of the corresponding first light emitting unit 120_i and the emitted light of the corresponding second light emitting unit 130_i. In other words, the i-th light guide 112_i extends from the corresponding first light emitting unit 120_i to the corresponding second light emitting unit 130_i.

[0054] The N light guides 112_1 to 112_N are each formed with a plurality (M) of discrete steps (roughened surfaces or lens arrays) 114_1 to 114_M in their extending direction (Y direction). Figure 1 In the example, the number of steps M is 5 and is the same for all the light guides 112, but it may also be that the number of steps M is different for each light guide 112.

[0055] In Figure 1 the vehicle lamp 100, the plurality of steps 114 are arranged in a matrix of M rows and N columns to form independent light emitting regions.

[0056] The above is the configuration of the vehicle lamp 100. Next, its operation will be described.

[0057] Figure 2 of (a) to Figure 2 of (d) are diagrams showing exemplary light emitting patterns of the vehicle lamp 100. Here, M = 4 and N = 6 are shown.

[0058] In Figure 2 of (a), all the light emitting regions of M rows and N columns are lit with the first color. The controller 140 turns on the first light source 122 and turns off the second light source 124 in all the first light emitting units 120, and turns on the third light source 132 and turns off the fourth light source 134 in all the second light emitting units 130.

[0059] In Figure 2In (b) thereof, all the light-emitting regions of M rows and N columns are lit in the second color. The controller 140 turns on the second light source 124 and turns off the first light source 122 in all the first light-emitting units 120, and turns on the fourth light source 134 and turns off the third light source 132 in all the second light-emitting units 130.

[0060] In Figure 2 In (c) thereof, the light-emitting regions of some columns (the third column and the fourth column) among the N columns emit light in the first color. The controller 140 turns on the first light source 122 and the third light source 132 and turns off the second light source 124 and the fourth light source 134 in the third column and the fourth column. The remaining light-emitting units 120_1, 120_2, 120_5, 120_6, 130_1, 130_2, 130_5, and 130_6 in the first, second, fifth, and sixth columns are in the off state.

[0061] Similarly, it is also possible to make the light-emitting regions of some columns among the N columns emit light in the second color.

[0062] In Figure 2 In (d) thereof, the light-emitting regions of some columns (the first column, the fourth column to the sixth column) among the N columns emit light in the first color, and the light-emitting regions of the remaining columns (the second column and the third column) emit light in the second color. The controller 140 turns on the first light source 122 and the third light source 132 and turns off the second light source 124 and the fourth light source 134 in the first column, the fourth column to the sixth column. In addition, in the third column and the fourth column, the first light source 122 and the third light source 132 are turned off, and the second light source 124 and the fourth light source 134 are turned on.

[0063] Thus, according to the vehicle lamp 100, it is possible to independently control the states (color and on / off) of a plurality of light-emitting regions for each column. Hereinafter, the combination of the states of the plurality of light-emitting regions is referred to as a lighting pattern.

[0064] The vehicle lamp 100 can also perform an animation (action) by changing the lighting pattern over time. Figure 3 In (a) of Figure 3 (b) is a diagram for explaining a transition example of the lighting pattern of the vehicle lamp 100.

[0065] In Figure 3 In (a) thereof, the light-emitting regions of the first color move downward from right to left in the figure. In Figure 3 In (b) thereof, a sequential lighting in which the columns are lit sequentially from the leftmost column is shown.

[0066] Figure 4 In (a) of Figure 4 (b) isFigure 3 of (a), Figure 3 The timing diagram corresponding to the transition of (b). Denote the lighting and extinguishing states of the first light source 122 and the third light source 132 in the i-th column as 122_i and 132_i.

[0067] In Figure 3 of (a) or Figure 3 of (b), it is also possible to light up the light-emitting area represented as the extinguishing state with the second color.

[0068] In Figure 3 of (a), Figure 3 of (b), and Figure 4 of (a), Figure 4 of (b), the movement of the light-emitting area in the X direction is described, but the vehicle lamp 100 can also move the light-emitting area in the Y direction.

[0069] Figure 5 of (a), Figure 5 of (b) is a diagram for explaining the movement of the light-emitting area in the Y direction. Figure 6 of (a), Figure 6 of (b) is Figure 5 of (a), Figure 5 The timing diagram corresponding to the transition of (b).

[0070] Figure 5 of (a) represents the first state where the upper half of the light-emitting area is lit to the second state where the lower half of the light-emitting area is lit of the transition. As shown in Figure 6 of (a), in the first state , the first light sources 122_1 to 122_6 of the multiple first light-emitting units 120 are lit, and the multiple second light-emitting units 130 are in the extinguished state. The emitted light of the first light sources 122_1 to 122_6 is guided downward in the light guide unit 110, but the farther away from the light source, the more it attenuates. Therefore, the brightness of the lower area is lower than that of the upper area. That is, it can be regarded as only the upper half being lit.

[0071] In the second state , the third light sources 132_1 to 132_6 of the multiple second light-emitting units 130 are lit, and the multiple first light-emitting units 120 are in the extinguished state. The emitted light of the third light sources 132_1 to 132_6 is guided upward in the light guide unit 110, but the farther away from the light source, the more it attenuates. Therefore, the brightness of the upper area is lower than that of the lower area. That is, it can be regarded as only the lower half being lit.

[0072] Multiple first light-emitting units 120 are extinguished, and the third light sources 132 of the multiple second light-emitting units 130 are lit.

[0073] Figure 5 The (b) of gradually changes from the first state to the second state. This transition can be achieved through Figure 6 the control of (b) of Figure 6 In the control of (b) of , the brightness of the first light source 122 and the third light source 132 can be continuously controlled.

[0074] Figure 7 is a diagram showing an example of the transition from the light emission state of the first color to the light emission state of the second color. Figure 8 is Figure 7 the timing diagram corresponding to the transition of

[0075] First, the controller 140 (i) causes the first light sources 122_1 to 122_6 to emit light in a plurality of first light emitting units 120, and causes the third light sources 132_1 to 132_6 to emit light in a plurality of second light emitting units 130. In this state, as Figure 7 shown in (i) of , the entire panel emits light in the first color.

[0076] The controller 140 (ii) gradually dims the first light sources 122_1 to 122_6 over time in a plurality of first light emitting units 120_1 to 120_6, and gradually increases the brightness of the second light sources 124_1 to 124_6 over time. As a result, as Figure 7 shown in (ii) of , the upper half of the panel changes from the first color to the second color.

[0077] Furthermore, the controller 140 (iii) gradually dims the third light sources 132_1 to 132_6 over time in a plurality of second light emitting units 130_1 to 130_6, and gradually increases the brightness of the fourth light sources 134_1 to 134_6 over time. As a result, the lower half of the panel changes from the first color to the second color, and finally, as Figure 7 shown in (iii) of , the entire surface of the panel becomes the second color.

[0078] Next, the use of the vehicle lamp 100 will be described. The vehicle lamp 100 can also be installed on the front grille of an automobile.

[0079] Figure 9 is a diagram showing the front grille 700 equipped with the vehicle lamp 100. The light guide unit 110 includes a plurality of light guides 112, and the plurality of light guides 112 are arranged horizontally. On the upper end face side of each light guide 112, a first light emitting unit 120 (not shown) is provided, and on the lower end face, a second light emitting unit 130 (not shown) is provided.

[0080] In the front grille 700, the first color can be set to white and the second color can be set to cyan. White can function as DRL, contour light, or hospitality light. When the vehicle equipped with the front grille 700 is driving in autonomous mode, by making the front grille 700 emit light in cyan, it is possible to notify surrounding road users that the vehicle is in autonomous driving mode.

[0081] In addition, the shapes of the plurality of light-emitting regions of the vehicle lamp 100 are not limited to rectangles, and can be parallelograms as shown in Figure 9 , or polygons such as triangles, pentagons, hexagons, octagons, or other shapes such as circles and ellipses. The shape of the light-emitting region can also be designed according to the shape of the steps provided on the light guide 112. Alternatively, rectangular steps can be formed in advance, and an extension or mask that removes the part of the light-emitting region can be covered on the surface of the light guide unit 110.

[0082] In addition, in Embodiment 1, when the height of the light guide unit 110 is relatively low, the plurality of second light-emitting units 130 can be omitted.

[0083] (Embodiment 2)

[0084] Figure 10 FIG. shows a vehicle lamp 200 according to Embodiment 2. The basic structure of the vehicle lamp 200 is the same as that of the vehicle lamp 100 in Embodiment 1, and includes a light guide unit 210, a plurality of first light-emitting units 220, and a plurality of second light-emitting units 230.

[0085] Similar to Embodiment 1, the light guide unit 210 includes a plurality of light guides 212 corresponding to the plurality of first light-emitting units 220 and second light-emitting units 230.

[0086] In Embodiment 2, each light guide 212 has a structure in which a plurality of (in Figure 10 , three) light guide plates 214a - 214c are laminated in the thickness direction.

[0087] For each light guide plate 214# (# = a - c), the first light-emitting unit 220 has a "pair" of a first light source 222# and a second light source 224#. Similarly, for each light guide plate 214#, the second light-emitting unit 230 has a "pair" of a third light source 232# and a fourth light source 234#.

[0088] The controller 240 can independently control the lighting / extinguishing of a plurality of first light sources 222a to 222c and a plurality of second light sources 224a to 224c for each first light emitting unit 220. Similarly, the controller 240 can independently control the lighting / extinguishing of a plurality of third light sources 232a to 232c and a plurality of fourth light sources 234a to 234c for each second light emitting unit 230.

[0089] Figure 11 FIG. is a cross-sectional view of the vehicle lamp 200. Steps 216a to 216c are formed at different heights in the light guide plates 214a1 to 214c, respectively. When the second light source 224 and the fourth light source 234 corresponding to the light guide plate 214_i are lit, the steps provided on the light guide plate 214_i emit light in the second color. In addition, when the first light source 222 and the third light source 232 corresponding to the light guide plate 214_i are lit, the steps provided on the light guide plate 214_i emit light in the first color.

[0090] The above is the configuration of the vehicle lamp 200. According to the vehicle lamp 200, by controlling the lighting / extinguishing of a plurality of first light sources 222a to 222c (232a to 232c) and a plurality of second light sources 224a to 224c (234a to 234c) in each first light emitting unit 220, it is possible to select which height of the steps emits light.

[0091] (Embodiment 3)

[0092] Figure 12 FIG. shows the vehicle lamp 300 according to Embodiment 3. The vehicle lamp 300 includes a light guide unit 310, a plurality of first light emitting units 320, a plurality of second light emitting units 330, and a controller 340. In Embodiment 3, the light guide unit 310 is composed of a single light guide panel 312.

[0093] In the light guide panel 312, a plurality of steps are formed in a matrix configuration. In addition, on the first end face S1 side of the light guide unit 310, a collimating optical system 314 is provided for each first light emitting unit 320. The collimating optical system may be formed integrally with the light guide unit 310. As Figure 12 shown, in the case where the light guide unit 310 is a single panel, in other words, in a configuration where the light beams of adjacent light emitting units are guided in the same light guide body, in order to limit the light guide paths of the respective light beams, a collimating optical system 314 can be provided. The collimating optical system 314_i makes the emitted light of the corresponding first light emitting unit 320_i into parallel light (plane wave), suppresses the light beam divergence, and guides it in the height direction (Y direction) in the light guide unit 310. In addition, as Figure 1 and Figure 10As shown, in the case where the light guide unit 110 (210) is formed by separating into a plurality of light guides 112 (212), light beams are enclosed in each light guide unit. Therefore, a collimating optical system can be provided or omitted.

[0094] Similarly, on the second end face S2 side of the light guide unit 310, a collimating optical system 316 is provided for each second light emitting unit 330. The collimating optical system 316_i makes the emitted light of the corresponding second light emitting unit 330_i into parallel light (plane wave), suppresses diffusion, and guides it in the light guide unit 310.

[0095] Alternatively, the collimating optical systems 314 and 316 may be convex members provided on the first end face S1 and the second end face S2 of the light guide unit 310.

[0096] By designing the collimating optical systems 314 and 316 well, it is possible to guide the emitted light of the plurality of first light emitting units 320 in the light guide panel 312 without interference.

[0097] In addition, it may be that in the Figure 12 vehicle lamp 300, the plurality of second light emitting units 330 and the plurality of collimating optical systems 316 are omitted.

[0098] Next, the use of the vehicle lamp 300 will be described. Figure 13 FIG. shows a headlamp 800 including the vehicle lamp 300. The headlamp 800 includes a low beam 802, a high beam 804, a clearance lamp 806, and a turn signal lamp and ADS lamp 810. The clearance lamp 806 may also serve as a DRL.

[0099] The turn signal lamp and ADS (Automated Driving System) lamp 810 is the vehicle lamp 300. When functioning as a turn signal lamp, it emits light in amber color, and when functioning as an ADS lamp, it emits light in cyan color. Therefore, the vehicle lamp 300 is designed such that the first color is amber and the second color is cyan.

[0100] In the Figure 13 it is also possible to form continuous steps on the entire surface of the light guide panel 312. Or it may be that, as Figure 12 shown, steps are formed in a matrix. Or it may be that steps are formed in one row and N columns.

[0101] Figure 14 FIG. shows a rear combination lamp 900 including the vehicle lamp 300. The rear combination lamp 900 includes a tail lamp and ADS lamp 910, and a turn signal lamp and ADS lamp 920.

[0102] The taillight-cum-ADS lamp 910 and the turn signal-cum-ADS lamp 920 are respectively Figure 12 the vehicle lamp 300. When the taillight-cum-ADS lamp 910 functions as a taillight, it emits light in red, and when it functions as an ADS lamp, it emits light in amber. Therefore, it is designed such that the first color is red and the second color is cyan.

[0103] When the turn signal-cum-ADS lamp 920 functions as a turn signal, it emits light in amber, and when it functions as an ADS lamp, it emits light in cyan. Therefore, it is designed such that the first color is amber and the second color is cyan.

[0104] Based on the embodiments, the present disclosure has been described using specific statements, but the embodiments only represent the principles and applications of the present disclosure. In the embodiments, within the scope not departing from the idea of the present disclosure defined by the claims, many variations or configuration changes are allowed.

[0105] [Industrial Applicability]

[0106] The present disclosure can be used in vehicle lamps.

[0107] [Explanation of Reference Numerals]

[0108] 100... vehicle lamp, 110... light guide unit, S1... first end face, S2... second end face, 112... light guide body, 120... first light emitting unit, 122... first light source, 124... second light source, 130... second light emitting unit, 132... third light source, 134... fourth light source, 140... controller, 200... vehicle lamp, 210... light guide unit, 212... light guide body, 214... light guide plate, 220... first light emitting unit, 222... first light source, 224... second light source, 230... second light emitting unit, 232... third light source, 234... fourth light source, 300... vehicle lamp, 310... light guide unit, S1... first end face, S2... second end face, 312... light guide panel, 314, 316... collimating optical system, 320... first light emitting unit, 322... first light source, 324... second light source, 330... second light emitting unit, 332... third light source, 334... fourth light source, 700... front grille, 800... headlamp, 900... rear combination lamp, 910... taillight-cum-ADS lamp, 920... turn signal-cum-ADS lamp.

Claims

1. A vehicle lamp, characterized in that, Comprising: A light guide unit, A plurality of first light emitting units, which are arranged along a first end face of the above light guide unit, and each includes a first light source emitting light of a first color and a second light source emitting light of a second color different from the above first color, A plurality of second light emitting units, which are arranged along a second end face opposite to the above first end face of the above light guide unit, and each includes a third light source emitting light of the above first color and a fourth light source emitting light of the above second color, and A controller, which controls the above plurality of first light emitting units, The above controller (i) causes the above first light source to emit light in the above plurality of first light emitting units, and causes the above third light source to emit light in the above plurality of second light emitting units, (ii) in the above plurality of first light emitting units, while causing the above first light source to gradually dim over time, causes the above second light source to gradually increase in light over time, (iii) in the above plurality of second light emitting units, while causing the above third light source to gradually dim over time, causes the fourth light source to gradually increase in light over time.

2. The vehicle lamp according to claim 1, wherein The above light guide unit includes a plurality of light guides, which correspond to the above plurality of first light emitting units and each extend starting from one corresponding to the above plurality of first light emitting units.

3. The vehicle lamp according to claim 1, wherein The above light guide unit includes a plurality of light guides, which correspond to the above plurality of first light emitting units and the above plurality of second light emitting units, and each extends from one corresponding to the above plurality of first light emitting units to one corresponding to the above plurality of second light emitting units.

4. The vehicle lamp according to claim 2, wherein In the above plurality of light guides, a plurality of discrete steps are formed for their respective extending directions.

5. The vehicle lamp according to claim 1, wherein The above light guide unit is a single light guide panel; On the above first end face of the above light guide panel, a collimating optical system provided for each of the above first light emitting units is provided or formed.

6. The vehicle lamp according to claim 1, wherein The above light guide unit has a laminated structure; Each layer of the above laminated structure has a step at a different height; The above first light emitting unit has a "pair" of the above first light source and the above second light source in each layer of the laminated structure.

7. The vehicle lamp according to any one of claims 1 to 6, wherein One of the above first color and the above second color is cyan.

8. The vehicle lamp according to any one of claims 1 to 6, wherein This vehicle lamp is installed on the front grille of a vehicle.

9. The vehicle lamp according to any one of claims 1 to 6, wherein This vehicle lamp is installed on a headlamp or a rear combination lamp.

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