• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A light guide structure (1) with at least one light guide (2, 2 ', 11, 12) and with at least two light feed positions (A, B, C), each of which has a light source (3, 3', 4, 4 ', 4 ") is assigned, the light guide for guiding the injected light and for emitting light due to formed on the light guide impurities (6) is arranged and the light sources (3, 3 ', 4, 4', 4 ") a drive circuit (9) is assigned, which is adapted to control the brightness of the light sources according to predeterminable dimming curves time-dependent.
    公开号:AT512544A1
    申请号:T197/2012
    申请日:2012-02-16
    公开日:2013-09-15
    发明作者:Markus Reinprecht；Thomas Graf；Anton Faffelberger
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    • * ♦ ·
    • · · ♦ ··· # * · ···· »· • · * # P12452
    Method for generating a running light effect on a light guide structure and light guide structure
    The invention relates to a method for producing a running light effect on a light guide structure having at least one light guide and at least two light feed positions, each associated with a light source, wherein the light guide for guiding the injected light and for emitting light due to the light guide trained impurities is set up.
    Furthermore, the invention relates to an optical waveguide structure having at least one optical waveguide and having at least two Lichteinspeisepositionen, each associated with a light source, wherein the optical waveguide for guiding the injected light and for emitting light is set up due to formed on the light guide impurities.
    Light sticks are increasingly used in vehicle construction, wherein light, e.g. of light-emitting diodes, is fed at an end face in a light stick. The light is inside the boundary walls of the most circular, but possibly also another, e.g. elliptical or rectangular cross-section optical fiber totally reflected, but at the impurities, e.g. are formed prismatic, abgereikt and radiated essentially at the opposite side of the impurity. The geometry of the light sticks is strongly determined by design specifications in motor vehicle construction, whereby the desired contours can often no longer be realized by a single luminescent rod and it is necessary in many cases aufzuschabeln a light stick in two branches. As one of many documents which show glow sticks, DE 103 56 483 A1, DE 101 53 543 A1 may be mentioned.
    An optical waveguide structure of the aforementioned type has become known from EP 0 935 091 A1. The subject of this document is a rod-shaped optical fiber, in which provided to achieve a uniform luminance over the entire length as Störstelien provided light-deflecting prisms have a width transverse to the rod axis, which increases starting from the Lichtein-coupling surface, wherein an embodiment is described in which Both ends of the light guide, a light input surface and, accordingly, two light sources are provided. P12452 • · · · · «
    An object of the invention is to provide a method of generating a chase effect and a method suitable for carrying out the method rather structure that provides a chase effect without the use of a large amount of driven light sources. Running light effects are currently realized by a plurality of successive and sequentially controlled light sources, such as incandescent lamps or LEDs, which makes the production and maintenance of such structures expensive.
    The object is achieved by a method of the type mentioned, in which according to the invention, the brightness of the light sources is independently changed time-dependent according to a predetermined rule.
    In an advantageous embodiment, it is provided that the brightness of a first light source is reduced from a maximum value after a first falling dimming ramp and the brightness of a second light source is reduced from a maximum value to a second falling dimming ramp, wherein the reduction of the brightness of the second light source delayed with respect to the insertion time lapse of the reduction of the first light source. This gives the impression that light flows from one end of a light rod to the other end.
    In another expedient embodiment, which allows a wiping effect, it can be provided that the brightness of a first light source is increased to a maximum value after a first rising dimming ramp, held at this value for a first predetermined period of time, and then after a first falling dimming ramp is decreased to a minimum value, and the brightness of a second light source is increased to a maximum value after a second rising dimming ramp, held at that value for a second predetermined period of time and then reduced to a minimum value after a second falling dimming ramp, the insertion point of the second rising dimming ramp is time delayed with respect to the insertion point of the first rising dimming ramp by a start delay time, and the insertion point of the second dimming ramp with respect to the insertion point of the first falling dimming ramp is a stop delay time t is delayed.
    It may also be advisable if the insertion point of the second rising dimming ramp falls within the first rising dimming ramp. PI2452 PI2452 -3; 'Λ · ·· ««
    Also, the maximum value of the second light source can continue until the end of the first falling dimming ramp of the first light source.
    If the light sources emit light of different colors, additional color-transition effects can be achieved.
    The stated object is further achieved with a light guide structure of the abovementioned type, in which, according to the invention, a drive circuit is assigned to the light sources, which is set up to control the brightness of the light sources in a time-dependent manner according to predefinable dimming curves.
    Suitably, it is an embodiment in which the drive circuit has a pulse generator for generating a basic pulse of predetermined duration.
    It is advantageous if the output of the pulse generator is supplied to a first pulse shaper for generating a first drive pulse with increasing and decreasing Dimmram-pe, the output of the pulse shaper further a delay stage to form a rise and / or Abfallverzogerung the basic pulse is supplied, the formed in the delay stage with a delayed rising or falling edge of a second pulse shaper for generating a second drive pulse with a correspondingly delayed increasing and decreasing dimming ramp is supplied and the outputs of the first and the second pulse shaper ever at least one Ansteuer- and driver stage for the first or second light source are supplied.
    In often useful variants, the light guides are bent.
    It may also be expedient if the optical waveguide structure has two optical fibers which run parallel and are formed in one piece.
    In a further recommendable variant it can be provided that the optical waveguide structure comprises two optical fibers which are brought together at one end and at this end a Iichteinspeiseposition for a first common light source and at its other ends a second and third light source at a second and third Lichteinspeiseposition , P12452 »· · ·« · ·
    -fe-I
    The invention is explained in more detail below with reference to exemplary embodiments which are illustrated in the drawing. In this show
    1 is a view of a first embodiment of a light guide structure according to the invention,
    2 shows a view of a second embodiment of a light guide structure according to the invention,
    3 is a view of a third embodiment of a light guide structure according to the invention,
    4 shows a view of a fourth embodiment of a light guide structure according to the invention,
    5 is a view of a portion of a light guide used in the invention,
    FIG. 6 shows a first exemplary time profile of the brightness control of two light sources used in the invention, FIG.
    7 shows a second exemplary time profile of the brightness control of two light sources used in the invention,
    8 shows a third exemplary time profile of the brightness control of two light sources used in the invention and FIG
    9 is a block diagram of an exemplary drive circuit of a light guide structure according to the invention.
    With reference to FIGS. 1 to 5, first some exemplary optical fiber structures and the optical fibers used therein will be described.
    The structure 1 of Fig. 1 shows a slightly curved light guide 2 having at each of its two ends at a light feeding position A and B, a light source 3 and 4, the light in a light-emitting surface 5, 6 can irradiate. Each of the two light sources 3, 4 is fed via supply lines 7, 8 from a drive circuit 9. Preferred light sources are LEDs, but other light sources, such as incandescent lamps, xenon lamps, etc. may also be used.
    Fig. 2 shows a light guide structure 1, which is formed as a double rod, and two light guides 2, 2 ', which are integrally formed. Again, each light guide 2, 2 'light-entrance surfaces 5.51; 6, 6 'into which light sources 3, 3'; 4, 4 'can irradiate. A drive circuit supplies via supply lines 7, 7 '; 8,8 'the aforementioned light sources 3,3'; 4,4 '. In Fig. 2 it can be seen that each optical fiber has a structure of impurities 10, these impurities are generally formed as prisms or prism-like.
    The optical waveguide structure 1 according to FIG. 3 differs from that according to FIG. 2 only in that the two optical waveguides 2, 2 'are not formed in one piece but separate from one another.
    FIG. 4 shows a further optical waveguide structure 1, which consists of two light guides 11, 12, which are separate from one another, with an optical waveguide 11 being straight and the second optical waveguide 12 being curved. Mechanically, the Lichtieiterstruktur 1 is in one piece and it has at the location of the coincidence of the two light guides 11, 12, a first Lichteinspeiseposition A and at the ends of the two light guides 11,12 depending on a further Lichteiispeiseposition B and C. The control of the unspecified light sources again takes place via a drive circuit. 9
    Fig. 5 shows an enlarged portion of a light guide 2, on which the structure of defects 10 can be seen. Here, the prisms of the structure 6 each have two light surface sides, namely each of the light surface sides 13 and the light surface sides 14. This makes it possible to actually radiate energy fed from both sides of the light guide 2, essentially at the side of the light guide opposite the structure 10 second
    With reference to FIG. 6, a first example of the method according to the invention for producing a running light effect in connection with the optical waveguide structures shown will now be explained. The upper diagram of FIG. 6 relates to the intensity profile of a first light source at position A and the diagram below to the intensity profile of a second light source at position B, these positions A. : -6- ..
    For example, Fl2452 and B correspond to those shown in FIG. At a time ti, the drive circuit 9 starts to feed the first light source in accordance with a linear dimming ramp, i. the intensity I increases until a time k. At this point in time t2, the second light source is also lit at position B, again with a linear dimming ramp. Up to a time tj, the first light source at the position A is forwarded again in accordance with a dimming ramp, the slope of which is, however, lower than during the time ti to t2. Starting with a time ta until a time tj, the first light source at the position A is slightly adjusted back, which can be seen on the falling, short ramp in the time between ta and t4. The second light source at the position B is further dimmed in the entire period from fe to L in accordance with a linear dimming ramp until finally at time U both light sources illuminate at positions A and B with maximum intensity, here until a switch-off time fc. With tü the overlap time is designated, i. the time in which both light sources emit light according to the predetermined dimming curves. Of course, both light sources do not necessarily have to shine with maximum intensity, but also a dimming back of one or both light sources to 0% is possible to enhance the wiping effect.
    The time of dimming the light source at position A depends on the application and may be between a few milliseconds and several seconds. Time-shifted by t2-h then the second light source at the position B, here on the other side of the light guide 2, dimmed.
    The light guide is designed so that at full illumination, the entire light guide has a uniform as possible light density. However, during the dimming phases of the two light sources, the light rod or light guide does not appear homogeneous and the changing luminance profile during the dimming phases is designed so that a wiping effect -from the structure 1 according to FIG. 1 from left to right-is perceived Wiping effect the right choice of overlap time and dimming ramps is important.
    Experience has shown that the wiping effect can be enhanced by having the intensity Ia of the first light source in the above-mentioned feedback range, i. in the time from t3 to U, is slightly decreased, e.g. at about 80% of maximum intensity. Such dimming back by a certain amount can be done not only during the dimming ramp of the second light source at the position B but also thereafter. P12452 ···································································································································································································································································· # · * · 9999
    In a possible application as " Wiper Blinker " in motor vehicles, for example, is fed with orange light sources from both sides of a light rod. A first light source is then dimmed within about 100 ms and about 10 to 20% before reaching the full brightness of this first light source, the dimming process is initiated at the second light source, so that after a maximum of 200 ms full brightness is reached.
    The light sources used in the invention need not radiate white light or be monochromatic, but also light sources with variable colors (RGB light sources) can be used. It is possible, for example, to generate a color transition from red to green at a first position A, which takes a few seconds. By a temporally offset color transition at the second position, a viewer then gets the impression that the color in the light guide is flowing from one side to the other.
    Another example of possible dimming curves is shown in the two illustrations of FIG. 7, which are to be understood analogously to those of FIG. 6. The intensity Ia of a first light source at a position A is at the time to from a certain maximum value, which can be arbitrarily defined. At a time h, dimming begins by a falling dimming ramp, this being exemplified linearly, however, for all of the dimming ramps described herein, logarithmic, exponential, quadratic or other waveforms are also possible, the intensity being reduced to a minimum value Time t2 drops and on this minimum value, which can also be chosen freely, eg 0% or 10% of the maximum intensity remains. It should be noted here that the falling ramp can already start at the time to, i. the uniform intensity value from to to ti can be skipped. At time t 0, the light source at position A is driven in accordance with a rising dimming ramp, again shown to be linear, but may also have a different waveform. The dimming ramp of dimming may also begin immediately after the minimum value at the foot of the falling dimming ramp has been reached, i. the time period from t2 to ts can be skipped. At the end of the rising dimming ramp, at a time L, the light source at position A has then reached maximum brightness again. P12452 «···» ·
    Looking at the intensity profile of the second light source at the position B, it can be seen that the second light source is controlled so that the temporal brightness curve is exactly opposite to that of the first light source at the position A. Again, it is possible, according to the variant previously described in Fig. 6 to provide time delays in the onset of dimming ramps and also different minimum and maximum values of both light sources can be specified. This type of control makes sense with different colored light sources, since this creates the effect that the light from position A (eg blue) from the light of position B (eg white) is slowly pushed back until the time t2, the light stick only white appears ,
    Based on the dimming curves of second light sources in positions A and B shown in FIG. 8, a time-delayed dimming of both light sources is described, which gives the viewer the impression of a light flowing out of the light guide. A first light source at the position A is driven to be lit from a time t o to a time h at a constant intensity, and is dimmed after a falling dimming curve, starting from a time t i to a time t 3
    A second light source at position B also lights up at the beginning, i. at time to, with a certain intensity, which remains constant over time ti up to a time t2. Only at time t2 is the second light source at position B also dimmed to a minimum value or to 0 after a falling dimming curve, which is steeper than the falling dimming curve of the first light source, since the time available for dimming is shorter.
    Referring to Fig. 9, a further variant of the method according to the invention will be explained, which gives a different effect of a running light between a time to and a time ti both light sources at the positions A and B are turned off. At time ti, a high dimming of the light source at the position A along a first rising dimming ramp begins until a maximum intensity value has been reached at a time t3. The intensity of the light source at the position A then remains constant until a time ti to go from here with a falling dimming ramp to 0 or a minimum value at a time ts. P12452 ·········································································································. · ·· ··· t '«! · ··· *
    On the other hand, high-intensity beaming of the light source at the position B does not take place until a time tz which is in the rising dimming of the first light source. The rising dimming ramp of the second light source at the position B goes up to a maximum value which is reached at a time 1¾, and remains at this maximum value until a time t ". Here, the intensity then falls by appropriate control by the drive circuit 9 according to a falling dimming ramp down to a minimum value or the value 0 at a time tz. Due to the slow dimming up of the first light source at the position A, the impression of a glowing bar or light guide becoming dark towards the end is created. Due to the delayed high dimming of the second light source at position B, the still darker area is illuminated and both light sources are dimmed up to a maximum. In order to generate a continuous effect, the light source 1 must first be dimmed during the shutdown process.
    With reference to FIG. 10, a drive circuit suitable for carrying out the method according to the invention will now be explained in principle, wherein this drive circuit 9 is set up to control the brightness of the light sources in a time-dependent manner according to predefinable dimming curves. In Fig. 10, the essential functions for the drive circuit 9 are divided into blocks A pulse generator 15 is used to generate a basic pulse of predetermined duration, this basic pulse, which serves as a drive or trigger pulse, periodically generated in fixed time sequence or spontaneously with longer pauses can.
    The output of the pulse generator 15 is supplied to a first pulse shaper 16 for generating a first drive pulse with increasing and decreasing dimming ramp and a delay stage 17 for forming a rise and / or fall delay of the basic pulse. The formed in the delay stage 17 pulse with delayed rise or. Falling edge is fed to a second pulse shaper 18 for generating a second drive pulse with a correspondingly delayed rising and falling dimming ramp. In this case, the delay stage controls the second pulse shaper 18 with a time adapted to the length of the luminescent rod or to the desired effect. The delay stage 17 also takes over the time shift in the turn-off moment to obtain a wiping effect in the desired direction. The outputs of the first and second pulse shaper 16,18 arrive at at least one drive and driver stage 19 and 20 for the first and second light source 3, 4. The generated in the Impulsumformem 16 and 18
    Dimming ramps are adapted on the one hand to the human eye and on the other hand to the freely selectable shape of the light stick. The dimming ramps are each parameterized to the geometry, to the sensitivity of the human eye and to the desired effect (wiping or color shifting), and they generally do not follow a mathematical function, but may, as indicated above, follow any functions, e.g. several continuous and / or composite mathematical functions, which may also contain one or more jump points.
    The rise and fall algorithm is designed differently to optimize the wiping effect. Each pulse shaper can control one or more drive and driver stages 19, 20. Especially in color mixing applications, multiple pulse shaper and driver and driver stages are needed. In the drawing, the possibility of using a plurality of pulse transducers 16 and 18, several drive and driver stages 19, 20 and a plurality of first and second light sources 3, 4 is indicated by dashed lines. Likewise, to illustrate the overall structure, a light guide 2 with two light feed positions A and B is located. · * · · · · · · * * * * * * * * * ««
    List of Reference Signs (not part of the application)
    Optical fiber structure
    optical fiber
    optical fiber
    light source
    light source
    light source
    light source
    Light entry surface
    Light entry surface
    Light entry surface
    Light entry surface
    feeder
    feeder
    feeder
    feeder
    drive circuit
    impurity
    optical fiber
    optical fiber
    Light plane sides
    Light plane sides
    Pulse generator first pulse shaper
    Delay stage second pulse shaper
    Drive and driver stage
    Drive and driver stage
    Lichteinspeiseposition
    Lichteinspeiseposition
    Intensity P12452 «« * · • 4 4 4 • 4 4 «4 4 4 4 4 4 * 4 4 4 4 4 4 # 4 4 4 4 4 44
    IntensitätΙ intensity ti..t7 time (ptuikte) t overcratching time
    权利要求:
    Claims (12)
    [1]
    P12452 ···· ·· »» a. : -13. Claims 1. A method for producing a running light effect on an optical waveguide structure having at least one optical waveguide and having at least two light feed positions, each associated with a light source, wherein the optical waveguide is arranged to guide the injected light and to emit light on the basis of impurities formed on the optical waveguide is, characterized in that the brightness of the light sources independently of each other according to predetermined Di mm curves is changed time-dependent.
    [2]
    2. The method according to claim 1, characterized in that the brightness of a first light source is reduced from a maximum value after a first falling Drmmrampe and the brightness of a second light source is reduced from a maximum value after a second falling dimming ramp, wherein the reduction of the brightness the second light source starts with a time delay with respect to the insertion time of the reduction of the first light source.
    [3]
    A method according to claim 1, characterized in that the brightness of a first light source is increased to a maximum value after a first rising dimming ramp, held at that value for a first predetermined period of time, and then reduced to a minimum value after a first falling dimming ramp and the brightness of a second light source is increased to a maximum value after a second rising dimming ramp is held at that value for a second predetermined period of time and then reduced to a minimum value after a second falling dimming ramp, the insertion point being the second rising dimming ramp Dimming ramp with respect to the insertion point of the first rising dimming ramp is delayed by a start delay time and the insertion point of the second occurring dimming ramp with respect to the insertion point of the first dimming ramp is delayed by a stop delay time P12452 P12452 • Mt I 9 9 ♦ ♦ · lt Ml

    * ♦ ··· * ♦ t • · «« * * * ♦ · * ♦
    [4]
    4. The method according to claim 1, characterized in that the insertion point of the second rising Dimmrampe falls into the first rising Dinunrampe.
    [5]
    5. The method according to claim 1, characterized in that the maximum value of the second light source continues until the end of the first falling dimming ramp of the first light source.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the light sources emit light of different colors.
    [7]
    7. Light guide structure (1) with at least one light guide (2, 2 ', 11, 12) and with at least two light feed positions (A, B, C), each of which has a light source (3, 3', 4, 4 ', 4 " ), wherein the light guide is arranged to guide the light fed in and to emit light due to impurities (6) formed on the light guide, characterized in that the light sources (3, 3 ', 4, 4', 4 " ) is associated with a drive circuit (9) which is adapted to control the brightness of the light sources according to predeterminable dimming curves time-dependent.
    [8]
    8. light guide structure (1) according to claim 7, characterized in that the drive circuit (9) comprises a pulse generator (15) for generating a basic pulse of predetermined duration.
    [9]
    9. optical fiber structure (1) according to claim 8, characterized in that the output of the pulse generator (15) is supplied to a first pulse shaper (16) for generating a first drive pulse with increasing and decreasing dimming ramp, the output of the pulse shaper (15) further a delay stage (17) is supplied to form a rise and / or fall delay of the fundamental pulse, formed in the delay stage (17) delayed rise or fall edge pulse to a second pulse shaper (18) for generating a second drive pulse with a correspondingly delayed increasing and decreasing Dimming ramp is supplied P12452

    The outputs of the first and the second pulse shaper (16, 18) each have at least one drive and driver stage (19, 20) for the first and second light source (11). 3, 4) are supplied.
    [10]
    10. optical fiber structure (1) according to one of claims 7 to 9, characterized in that the light guides (2,12) are bent.
    [11]
    11. optical fiber structure (1) according to any one of claims 7 to 10, characterized in that it comprises two light guides (2,2 ') which are parallel and formed integrally.
    [12]
    12. optical waveguide structure (1) according to any one of claims 7 to 11, characterized in that it comprises two light guides (11, 12) which are brought together at one end and at this end a Lichteinspeiseposition (A) for a first common light source (3 ) and at their other ends have a second (4) and third (4 ") light source at a second and third light input position (B and C).

    Vienna, the 1 B, Fe
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    同族专利:
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    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    2017-10-15| MM01| Lapse because of not paying annual fees|Effective date: 20170216 |
    优先权:
    申请号 | 申请日 | 专利标题
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    ATA1004/2012A| AT512545B1|2012-02-16|2012-09-13|Status display for the state of an operationally relevant component of a motor vehicle|
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    IN1763MUN2014| IN2014MN01763A|2012-02-16|2014-09-02|
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