Device and method for generating moving light effects

Abstract

Headlight or taillight of a motor vehicle with a device for generating moving light effects with a light guide (2, 21, 31, 32, 41) with at least two light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) which feed light into the light guide (2, 21, 31, 32, 41), wherein the light from the light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) is mixed in the light guide (2, 21, 31, 32, 41) in such a way that a color gradient is discernible in the light guide (2, 21, 31, 32, 41) and wherein the light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) can be controlled in such a way that a dynamically changing color distribution results in the light guide, wherein the light guide (2,21,31,32,41) is integrated into the headlight or into the rear light, in particular as a flashing light.

Description

Technical field

[0001] The invention relates to a device and a method for generating moving light effects. State of the art

[0002] In motor vehicles, lighting effects are used to perform illumination, display, or warning functions. Static lighting effects are well-known. Alternating lighting effects, in which lights are switched on and off, are also common.

[0003] Moving light effects are also known, in which a large number of light sources are arranged in a chain that are switched on and off sequentially to create a continuous band of light. However, depending on the length of the light band, this requires a large number of individual light sources that must be controlled independently. These devices with numerous light sources are therefore correspondingly expensive.

[0004] DE 10 2008 015 561 A1 discloses an electronic display with a light source system and a light guide system, wherein the light guide system emits luminous features laterally in selected positions along its length.

[0005] WO 2013 / 120124 A2 discloses a light guide structure with at least one light guide and with at least two light feed positions, each of which is assigned a light source, with a control circuit for time-dependent control of the brightness of the light sources.

[0006] DE 10 2012 009 338 A1 discloses a lighting device with a light guide and two colored light sources and a control for generating a color gradient of the light along the light guide.

[0007] JP 2003 250 985 A discloses a lighting device with a light guide and two light sources arranged at the respective ends of the light guide and a control for generating different light supply states.

[0008] JP 2003 297 109 A discloses a lighting device with a light guide having a longitudinal groove.

[0009] DE 10 2010 020 796 A1 discloses a lighting device for a vehicle interior with at least two light sources for generating different lighting functions.

[0010] US Patent 5,400,225 A discloses a motor vehicle with a light guide arranged along the circumference of the rear window for generating light signals.

[0011] AT 369 571 B reveals a photographic advertising panel with several translucent panels arranged one behind the other. Description of the invention, problem, solution, advantages

[0012] Therefore, the object of the present invention is to provide a device and a method for generating moving light effects that can be implemented cost-effectively.

[0013] The object of the present invention with regard to the device is solved by the features according to claim 1.

[0014] One embodiment of the invention relates to a device for generating moving light effects with an optical fiber comprising at least two light sources which feed light into the optical fiber. The light from the light sources is mixed in the optical fiber in such a way that a color gradient is discernible within the optical fiber, and the light sources can be controlled such that a dynamically changing color distribution results within the optical fiber. Through the mixing of the light and its control for temporal variation, the optical fiber can be perceived as a dynamically changing, colored optical fiber. In contrast to the prior art, the dynamic light effect is not achieved by switching light sources on and off, but rather by dynamically mixing light. Since this requires fewer light sources, it can be achieved correspondingly cost-effectively.

[0015] It is advantageous if the optical fiber has at least one linear or at least one planar optical fiber, or an arrangement of linear and / or planar optical fibers. This allows for a linear or planar structure, or a mixture of different linear and / or planar structures, to achieve a desired optical lighting effect. For example, even with an arrangement of several linear optical fibers, the light sources can be controlled in such a way that a dynamic lighting effect transitions from one optical fiber to another.

[0016] It is also advantageous if, when using a linear light guide, light from at least one light source can be fed into the light guide at each end. This allows for a dynamic mixing of light fed in at both ends along the linear light guide, resulting in a linear light path and linear movement of the mixed light.

[0017] It is also advantageous to include an additional light source that feeds light into the light guide, either between the two end-mounted light sources or at a distance from the other light sources. This allows for a further effect, as the light from three light sources can now be mixed to create a dynamic effect.

[0018] It is also advantageous if the light source is directly coupled to the light guide to feed the light into the light guide, or if the light source is coupled to the light guide via a transfer light guide to feed the light into the light guide. This allows the design of the light guide to be chosen independently of the choice of light source and its mounting.

[0019] It is also advantageous if the light source is a light-emitting diode (LED), either as a multi-color LED in a single package or as a monochromatic LED. This allows for high luminous intensity to be achieved in a small space for feeding into the light guide.

[0020] It is advantageous if the common LED is an RGB LED emitting red, green, and blue light, or alternatively, an LED that emits white light and light of other colors. For example, the white light LED could contain such a diode, with additional colors potentially available. In an RGB LED configuration, one LED emits red light, another blue light, and another green light. Alternatively, the RGB LED could also include another LED emitting light of a different color, such as white light.

[0021] According to the invention, the light guide is integrated into a headlight or a taillight.

[0022] The object of the present invention with regard to the use of the method is solved by a method having the features according to claim 8.

[0023] One embodiment of the invention relates to a method for generating moving light effects by means of a light guide with at least two light sources, wherein the light sources feed light into the light guide and the light from the light sources is mixed in the light guide in such a way that a color gradient is recognizable in the light guide and wherein the light sources are controlled in such a way that a dynamically changing color distribution results in the light guide.

[0024] It is advantageous if the light guide has at least one linear light guide or at least one planar light guide or an arrangement of linear and / or planar light guides, and the light from the at least two light sources is controlled in its color and / or brightness in such a way that a dynamic lighting effect is created by the mixed light.

[0025] It is also advantageous to use at least two light sources of different colors and to control the brightness and / or color of at least one of the at least two light sources, or in particular both light sources, to create a dynamic lighting effect. This control allows the light to be mixed, resulting in a spatially resolved dynamic mix.

[0026] It is also advantageous to use two light sources of different colors to create a dynamic lighting effect by reducing or increasing the brightness of one light source and / or increasing or decreasing the brightness of a second light source. Alternatively, only one light source can be controlled to change its brightness, either by increasing or decreasing it, while the other light source remains at its current brightness setting.

[0027] It is also useful to supply light of different colors by means of two light sources and to create a dynamic lighting effect by reducing or increasing the brightness of a first light source and keeping the brightness of a second light source essentially constant.

[0028] It is also advantageous to additionally or alternatively control the color of the first and / or second light source. This allows for the creation of dynamic lighting effects with changing color gradients.

[0029] In one embodiment of the invention, it is advantageous if two light guides are provided, each of which has an end-side light feed by means of light sources, wherein one end of one light guide is arranged adjacent to one end of the other light guide, wherein the light sources are controlled in such a way that the dynamic light effect passes from one light guide to the other light guide.

[0030] It is also advantageous if the light source(s) can be completely switched on or off in order to create additional lighting effects.

[0031] Furthermore, it is advantageous to provide an additional light source which feeds light into the light guide, wherein this light is fed in between the two end-side light sources or this light is fed into the light guide at a distance from the other light sources, wherein this additional light source is controlled in such a way that the emitted light has a dynamic or static brightness and / or color gradient.

[0032] Advantageous embodiments of the present invention are described in the dependent claims and the following description of the figures. Brief description of the drawings

[0033] The invention will now be explained in detail using an exemplary embodiment and with reference to a drawing. The drawing shows: Fig. 1 a schematic representation of a device according to the invention for generating moving light effects, Fig. 2 a schematic representation of the device according to Fig. 1, Fig. 3 a schematic representation of a device according to the invention for generating moving light effects, Fig. 4 a schematic representation of a device according to the invention for generating moving light effects, Fig. 5 a schematic representation of a device according to the invention for generating moving light effects, Fig. 6 a schematic representation of a device according to the invention for generating moving light effects, Fig. 7 a schematic representation of a device according to the invention for generating moving light effects, Fig. 8 a schematic representation of a device according to the invention for generating moving light effects, Fig. 9 a schematic representation of a device according to the invention for generating moving light effects, and Fig. 10 a schematic representation of a device according to the invention for generating moving light effects. Preferred embodiment of the invention

[0034] The invention relates to a device and a method for generating moving light effects. The embodiments shown in the figures have features, wherein the features of different embodiments can be combined with one another.

[0035] The Fig. Figure 1 shows a device 1 for generating moving light effects, comprising a light guide 2 with at least two light sources 3, 4. The light sources 3, 4 are arranged at the end faces 5, 6 of the linear light guide 2. The light sources 3, 4 are controlled by a control unit 7, which is electrically connected to the light sources 3, 4 via connecting lines 8, 9. Depending on the embodiment, the control unit 7 can control the brightness and / or the color of the light emitted by the light sources 3, 4.

[0036] The Fig. Figure 1 shows the arrangement of a linear light guide 2, which in the exemplary embodiment of the Fig. Each of the two light sources 3 and 4 is equipped with a single-color LED at its respective end 5 and 6. The color of the light source, as well as the light color, of the two light sources 3 and 4 is different. For example, light source 3 is red and light source 4 is green. The light from one of the light sources 3 and 4 is visible in the light guide 2 and decreases in brightness from the end 5 and 6 where light source 3 and 4 are located to the opposite end 6 and 5. The opposite is true for the other light source 4, so that the light emitted by this light source 4 and 4 is also visible in the light guide 2 and decreases in brightness from the end 6 and 5 where light source 4 is located to the opposite end 5 and 6.

[0037] Where the brightness of the two light colors is equal, the mixed color results; in the example of the two colors red and green, the mixed color would be yellow. This zone of the mixed color is marked with area 10 in the figure. Between area 10, where the brightness of the light is equal with both colors, and the two end faces 5, 6, the mixed color transitions towards the color of the respective light source 3, 4. In the exemplary embodiment of the Fig. 1. The color ranges from yellow through orange to red and from yellow through green-yellow to green.

[0038] By dynamically changing the brightness of one or both light sources 3 and 4 simultaneously, the point in the light guide where the brightness of the light of both colors is equal shifts. This causes the location of the mixed color to move, and consequently, so does the location or section of the color gradient between the mixed color and the pure color of the emitted light from the respective light sources 3 and 4. Since the location of the mixed color, defined as area 10, moves due to the variation in the brightness of the light from the two source colors, the impression arises that the light color is moving.

[0039] In Fig. 2 shows how area 10, i.e. the area of ​​the mixed color, extends from the middle position according to Fig. 1 moved to the right towards the light source 4.

[0040] In another embodiment, the light source 3, 4 at the respective end faces 5, 6 of the light guide 2 can emit not only one color, but, for example, two colors at each end of the light guide. This makes it possible to control not only the brightness of the light emitted by the light sources, but also to change the color at the ends. If the two light sources 3, 4 at the end faces of the light guide 2 are the same, the color at the ends can, for example, be reversed. This means that, with a red-green diode as the light source, the transition from red to green can, for example, occur from right to left. As the area of ​​the mixed color moves towards one end, the light colors can then be swapped to cause a corresponding movement process in the opposite direction.

[0041] In the exemplary embodiment of the Fig. In addition to the light sources 3 and 4, which are each arranged at the end face of the light guide 2, a further light source 11 is provided, which is arranged approximately in the middle of the light guide 2 and feeds its light into the light guide there. The light source 11 continues to be controlled by the electronic control unit 7 via line 12. By adding another light source 11, such as an LED, a greater variety in the generation of moving light effects can be achieved, since the color mixing can be varied even more along the length of the light guide 2, as the point of equal brightness is now determined by at least three light sources 3, 4, and 11, thus allowing for greater diversity.

[0042] Furthermore, brief switching on and off or reduced brightness of the third light source 11 can cause jumping or very rapid movement of the places of equal brightness in the areas 10.

[0043] The Fig. Figure 4 shows a further embodiment of a device 20 for generating moving light effects, wherein the light guide 21 assumes an arc-shaped, advantageously semicircular shape. Alternatively, the arc can also be extended further, so that it appears U-shaped or parabolic, lying on its side.

[0044] The light guide 21 further has end faces 22, 23, at which light sources 24, 25 are arranged, which feed light into the light guide. The light sources 24, 25 are controlled by the control unit 26, the light sources being connected to the control unit 26 by means of the lines 27, 28.

[0045] By designing the light guide 21 as a linear light guide, a variety of configurations can be achieved to create a moving light effect in one application example. Accordingly, the light guide 21 can be designed in many different shapes, with the illustrated embodiments being examples of the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 does not mean any limitation of the scope of protection.

[0046] The Fig. Figure 5 shows the arrangement of two semicircular light guides 31, 32 in a device 30 for generating moving light effects. The light guides 31, 32 are each supplied with light by means of the light sources 33, 34 and 35, 36 respectively, with the light sources 33 to 36 being controlled by the control unit 37. Due to the arrangement of the two semicircular light guides 31, 32 in a circle, the light color can also move in a circle from one light guide 31, 32 to the next light guide 32, 31 when appropriately controlled.

[0047] The Fig. Figure 6 shows a further embodiment of a device 40 for generating moving light effects, wherein a planar light guide 41 is provided with an arrangement of light sources 42 to 49, wherein a control unit 50 is provided for controlling the respective light sources 42, 49.

[0048] By arranging the light sources 42 to 49 and controlling them, a moving light effect with respect to the mixed colors can be achieved in the area of ​​the planar light guide 41.

[0049] In the exemplary embodiments, it is particularly advantageous to use a light-emitting diode (LED) as the light source. An LED that emits only a single color of light, i.e., light with a defined color, can be used. Alternatively, an LED capable of emitting multiple colors of light can be used. For example, an RGB LED can be used, which has three LEDs within a single housing for generating red, green, and blue light. Alternatively, three individual LEDs can be used, each emitting red, green, or blue light, respectively. Furthermore, an LED that also generates light of another color, such as white light or another color of light, can be used as an alternative.

[0050] In combined light-emitting diodes, individual light-emitting diodes can be contained in a single light-emitting diode housing, or the individual light-emitting diodes can be grouped together without a physical unit, or a combination of these possibilities can be used.

[0051] Light sources, especially LEDs, can be directly connected to the light guide to feed the light emitted by the light source directly into the light guide. For this purpose, the light source can be positively or materially bonded to the light guide, so that the light source and the light guide can form a single structural unit. Alternatively, the light source can, for example, be mounted on a circuit board, and the light can be transferred from the light source to the actual light guide using a transfer light guide.

[0052] In addition to the example above of mixing two light colors, it is also possible to mix white light with colored light. This is analogous to the exemplary embodiment of the Fig. 1. A light source emitting white light is arranged, and another light source emitting colored light, such as red, green, or purple light, is arranged. If only white light is switched on first, the light guide becomes white due to the white light. If the colored light is then slowly dimmed in, it is not possible to see the difference as in the example with the red and green light according to... Fig. 1. Instead of a color gradient, the impression is created of varying color saturation along the length of the optical fiber. One can discern a transition from red through dark and light pink to white.

[0053] The resulting effect is that the color gradually fades from the side of the colored light source to the side of the white light source, decreasing in saturation from a saturated hue to white. This effect can also be described as a comet's tail. It can also be advantageous to further enhance this lighting effect by controlling not only the brightness of the light sources but also the color, creating a dynamic effect. The color can either change statically or be continuously altered. This continuous change can, for example, be accompanied by variations in brightness. This creates a lighting effect similar to a moving comet.This effect can also be described by saying that the light guide is filled with color, like a glass filled with water into which a colored liquid is poured.

[0054] This effect is created by the fact that according to Fig. 1. Instead of the light sources mentioned there, a white LED is attached as a light source on one side of the light guide, and one or more colored LEDs as light sources on the other side. In this case, the described effect can only occur in one direction. If, for example, the white light color is generated with an RGB LED arranged on both sides of the light guide, the effect can be displayed in both directions because the RGB LED can also generate white light by mixing the three primary colors, while colored light can be emitted on the other side. If, for example, starting from the white light guide, the light guide is now completely saturated with red light due to the initial input of white light and red light, the process can be dynamically reversed by introducing white light.

[0055] The aforementioned examples regarding red light can of course be controlled accordingly with all other light colors.

[0056] There are many possible applications for dynamic lighting effects and the corresponding devices, for example in a motor vehicle. A suitable light guide can be integrated into a vehicle's taillight, with the light guide positioned transversely to the direction of travel. This allows for one LED to be positioned as the light source at the outer edges of the vehicle, and another LED to be positioned at the inner end of the light guide. If the LEDs at the vehicle's edges are white, and those closer to the center are orange or red, then a brightening effect can be achieved by gradually increasing the intensity of the orange or red light as a light stripe within the light guide, moving from the center of the vehicle towards the edge.Simultaneously, this effect can be further enhanced by dimming the white LED, creating a visible movement of the light color from the center of the vehicle to the outer edges. The same principle can be applied, for example, to a vehicle headlight. If a light guide is positioned above the headlight, a "winking" effect can be achieved by filling the white light guide with colored light as described above. When using orange light, this filling of the white light guide can also function as a flashing light, provided the filling frequency is set according to the permissible flashing frequency.

[0057] Furthermore, it is also quite possible that the light guide can be illuminated brightly and darkly by switching the light sources on and off or by changing the brightness without changing the color gradient.

[0058] Furthermore, it is advantageous if the control of the light sources is carried out using PWM frequencies for the opposing light sources, such as LEDs, whereby, for example, a variation of the PWM frequencies is made.

[0059] Optical fibers can be designed in such a way that their shape or cross-section, as well as additional optical elements on the fiber, can be used to influence advantageous effects, for example, to achieve complete illumination of the fiber in bending areas. For this purpose, optics such as prisms or lenses, or roughened surfaces, can be incorporated into the fiber, which promote the reflection of light within the fiber, even into areas that would be less illuminated without these additional elements.

[0060] The use of flat light guides can also be planned for the vehicle interior, for example to create a flat lighting effect behind decorative elements or surfaces, which includes moving lighting effects.

[0061] According to Fig. 6. A number of light sources may be attached to one side of a planar light guide, or to several sides or around the entire planar light guide, whereby light sources, such as LEDs, may also be arranged on or behind the surface of the planar light guide. By varying the brightness of the light sources over time, a gradient of planar light can be created, which may resemble, for example, a flickering fireplace, whereby the variation in brightness across the surface can be controlled regularly, irregularly, or randomly.

[0062] With appropriate arrangement, the generated mixed color can be arranged in a circular pattern instead of a linear one, allowing these circular arrangements of the mixed color to move dynamically, for example, from the inside out or vice versa. A yellow dot, for instance, can become a yellow circle and eventually a yellow area, thus enabling dynamic changes in the illumination of the planar light guide.

[0063] Furthermore, the generation of moving light effects can also be used for display devices, for example in a motor vehicle, when status indications are required. For instance, a distance indicator can be visually displayed as a distance warning device, so that the distance of a vehicle from an obstacle or another vehicle can be shown by the device, with the light guide changing color as the vehicle approaches the obstacle. A vehicle in the adjacent lane can also be indicated using such a status display. Furthermore, such devices for generating moving light effects can also be used as status indicators in a motor vehicle. For example, the position of windows or sunroofs can be displayed.Alternatively, other displays can be made with it, such as the distribution of the volume setting of an audio system, also called balance, where the distribution can be displayed from left to right or from front to back.

[0064] Furthermore, a temperature can be displayed, such as an interior temperature, at which point the light guide changes color accordingly. As the temperature changes, the colors can also shift in proportion to the rising temperature. Alternatively, the opening angle of a door or the fill level of a tank or water reservoir, such as windshield washer fluid, can be displayed.

[0065] Dynamic processes, such as the acceleration of the vehicle, can also be displayed using a suitable display device with a color-changing light guide.

[0066] The provision of a light guide according to the invention for a device for generating moving light effects would have the advantage that, for example, in a warning device for an approaching obstacle, the indicators do not have to be permanently assigned on a circuit board by, for example, permanently arranging LEDs of the corresponding colors on the board. Through the clever color mixing of the light in the light guide, a multitude of different colored and moving light states can be displayed with just a few LEDs.

[0067] For example, the same display device can be used with a device for generating moving light effects, allowing the display to be switched between the right and left sides without changing the device itself. Simply controlling the light colors accordingly may suffice to display the information for the right or left side of the vehicle, which is advantageous, for instance, in a distance warning display with visual support.

[0068] Furthermore, it can be advantageous to combine color and brightness control with a sensor integrated into the light guide, which can be positioned in front of, inside, or behind the light guide. This would allow the system to track the color change based on the position of, for example, a finger touching the light guide, as the finger is moved along the guide. This would enable the adoption and display of user interface concepts similar to those found on touch displays, such as swiping, zooming, and single- and double-tapping of display elements.

[0069] The Fig. Figure 7 shows an alternative arrangement of a linear light guide 61, which in the exemplary embodiment of Fig. 7 is equipped on both sides with two single-color or multi-color LEDs as light sources 62, 63, 64, and 65 at the respective end faces 66, 67. Multi-color effects can be achieved by arranging two LEDs one above the other. Multiple light sources instead of just one at a single light source can also be used in other embodiments.

[0070] The Fig. Figure 8 shows an alternative arrangement of a linear optical fiber 70 compared to the optical fiber of the Fig. 3. In this case, the Fig. Figure 8 shows a plurality of light sources 71, 72, 73, 74 and 75 arranged, with the two light sources 71, 72 being arranged at the respective end faces 77 of the light guide. The light sources 73 to 75 are arranged in a central region of the light guide and feed their light into the light guide at an angle other than 90°. For this purpose, the light guide has a projection 78, 79, which is oriented at an angle other than 90° to the longitudinal extent of the light guide. The projections 78, 79 are also oriented to both sides of the light guide.

[0071] The Fig. 9 and Fig. Figure 10 each shows the outline of a spotlight 80 in which two light guides 81, 82 are arranged. The light guides 81, 82 are each supplied by means of two light sources 83, 84, 85, 86, such as light-emitting diodes, which feed their light into the end face of the respective light guide 81, 82.

[0072] The control method according to the invention allows the upper and / or the lower light guide 81, 82 to be controlled for dynamic color changes, so that a kind of "winking" effect becomes visible. Fig. 9 the two light guides 81 and 82 light up, while in Fig. 10 Only the lower light guide illuminates. In the case of a light guide 81 being arranged above the headlight 87, a "winking" effect can be achieved by filling a white light guide with colored light as described above. When using orange light, filling the white light guide can also be used as a flashing light. Reference symbol list 1 Device 2 fiber optic cables 3 light bulbs 4 light bulbs 5 front end 6 front end 7 Control unit 8 Line 9 Management Area 10 11 light bulbs 12 Line 20 Device 21 fiber optic cables 22 front end 23 front end 24 light bulbs 25 light bulbs 26 Control unit 27 Management 28 Management 30 Device 31 fiber optic cables 32 fiber optic cables 33 light bulbs 34 light bulbs 35 light bulbs 36 light bulbs 37 Control unit 40 Device 41 light bulbs 42 light bulbs 43 light bulbs 44 light bulbs 45 light bulbs 46 light bulbs 47 light bulbs 48 light bulbs 49 light bulbs 50 control unit 61 optical fibers 62 light bulbs 63 light bulbs 64 light bulbs 65 light bulbs 66 front end 67 front end 70 fiber optic cables 71 light bulbs 72 light bulbs 73 light bulbs 74 light bulbs 75 light bulbs 76 light bulbs 77 front end 78 Approach 79 Approach 80 Headlight contour 81 fiber optic cables 82 fiber optic cables 83 light bulbs 84 light bulbs 85 light bulbs 86 light bulbs 87 Headlight

Claims

[1] Headlight or rear light of a motor vehicle with a device for generating moving light effects with a light guide (2, 21, 31, 32, 41) with at least two light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) which feed light into the light guide (2, 21, 31, 32, 41), wherein the light from the light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) is mixed in the light guide (2, 21, 31, 32, 41) in such a way that a color gradient is discernible in the light guide (2, 21, 31, 32, 41) and wherein the light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) can be controlled in such a way that a dynamically changing color distribution results in the light guide, wherein the light guide (2,21,31,32,41) is integrated into the headlight or into the rear light, in particular as a flashing light. [2] Headlight or rear light according to claim 1, characterized by, that the optical fiber (2,21,31,32,41) has at least one linear optical fiber (2,21,31,32) or at least one planar optical fiber (41) or an arrangement of linear and / or planar optical fibers. [3] Headlight or rear light according to at least one of the preceding claims, characterized by , that when using a linear light guide (2,21,31,32) light from at least one light source (3,4,24,25,33,34,35,36) can be fed into the light guide (2,21,31,32) at each end of the light guide. [4] Headlight or rear light according to at least one of the preceding claims, characterized by, that a further light source (11) is provided which feeds light into the light guide (2,21,31,32,41), wherein this light is fed in between the two end-side light sources (3,4,24,25, 33,34,35,36) or this light is fed into the light guide (2,21,31,32,41) at a distance from the other light sources (3,4,24,25,33,34,35,36). [5] Headlight or rear light according to at least one of the preceding claims, characterized by , that the light source (3,4,11,24,25, 33,34,35,36,42,43,44,45,46,47,48,49) is directly coupled to the light guide (2,21,31, 32,41) in order to feed the light into the light guide (2,21,31,32,41) or that the light source (3,4,11,24,25,33,34,35,36,42,43,44,45,46, 47,48,49) is coupled to the light guide (2,21,31,32,41) by means of a transfer light guide in order to feed the light into the light guide (2,21,31,32,41). [6] Headlight or rear light according to at least one of the preceding claims, characterized by , that the light source (3,4,11,24,25, 33,34,35,36,42,43,44,45,46,47,48,49) is a light-emitting diode (LED), wherein the light-emitting diode is designed as a common light-emitting diode with a plurality of colors in a light-emitting diode package or as monochromatic light-emitting diodes with only one color. [7] Headlight or rear light according to claim 6, characterized by that the common light-emitting diode is an RGB light-emitting diode with the colors red, green and blue, or a light-emitting diode that emits white light and light of other colors. [8] Use of a method for a light guide (2, 21, 31, 32, 41) for generating moving light effects of a headlight or a taillight by means of a light guide with at least two light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49), wherein the light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) feed light into the light guide (2, 21, 31, 32, 41) and the light from the light sources (3, 4, 11, 24, 25, 33, 34, 35, 36, 42, 43, 44, 45, 46, 47, 48, 49) in the light guide (2,21,31,32,41) is mixed in such a way that a color gradient is discernible in the light guide (2,21,31,32,41) and wherein the light sources are controlled in such a way that a dynamically changing color distribution results in the light guide, wherein the light guide (2,21,31,32,41) is integrated into a headlight or into a rear light, in particular as a flashing light. [9] Use according to claim 8, characterized by, that the light guide has at least one linear light guide (2,21,31,32) or at least one planar light guide (41) or an arrangement of linear and / or planar light guides (2,21,31,32,41) and the light from the at least two light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) is controlled in its color and / or brightness in such a way that a dynamic lighting effect is created by the mixed light. [10] Use according to claim 8 or 9, characterized by , that light of different colors is supplied by means of at least two light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46, 47,48,49) and that the brightness and / or color of at least one of the at least two light sources or, in particular, of the at least two light sources is controlled in order to generate a dynamic lighting effect. [11] Use according to claim 10, characterized by, that light of different colors is supplied by means of two light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) and to create a dynamic lighting effect the brightness of a first light source is reduced or increased and / or the brightness of a second light source is increased or reduced. [12] Use according to claim 10, characterized by , that light of different colors is supplied by means of two light sources (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) and to create a dynamic lighting effect the brightness of a first light source is reduced or increased and the brightness of a second light source is kept essentially constant. [13] Use according to claim 11 or 12, characterized by , that additionally or alternatively the color of the first and / or the second light source (3,4,11,24,25,33,34,35,36,42,43,44,45,46,47,48,49) is controlled in a variable manner. [14] Use according to any one of the preceding claims 8 to 13, characterized by , that two light guides (31,32) are provided, each of which has an end-side light supply by means of light sources, wherein one end of one light guide is arranged adjacent to one end of the other light guide, wherein the light sources are controlled in such a way that the dynamic light effect passes from one light guide to the other light guide. [15] Use according to at least one of the preceding claims 8 to 14, characterized by that the light source(s) can also be completely switched on or off in order to create additional lighting effects. [16] Use according to at least one of the preceding claims 8 to 15, characterized by, that a further light source is provided which feeds light into the light guide (2,21,31,32,41), wherein this light is fed in between the two end-side light sources or this light is fed into the light guide at a distance from the other light sources, wherein this further light source is controlled in such a way that the emitted light has a dynamic or static brightness and / or color gradient.

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