WO2023105082A1 - Pilotage de groupes de pixels d'une source lumineuse pour réaliser une transition lumineuse - Google Patents
Pilotage de groupes de pixels d'une source lumineuse pour réaliser une transition lumineuse Download PDFInfo
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- WO2023105082A1 WO2023105082A1 PCT/EP2022/085334 EP2022085334W WO2023105082A1 WO 2023105082 A1 WO2023105082 A1 WO 2023105082A1 EP 2022085334 W EP2022085334 W EP 2022085334W WO 2023105082 A1 WO2023105082 A1 WO 2023105082A1
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- pixels
- target
- light source
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- pixel
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- 230000007704 transition Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000011664 signaling Effects 0.000 claims description 14
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 2
- 230000015654 memory Effects 0.000 description 13
- 230000006870 function Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000009877 rendering Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1407—General lighting circuits comprising dimming circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/18—Controlling the light source by remote control via data-bus transmission
Definitions
- the present invention relates to the field of controlling a pixelated source of a signaling or lighting system, in particular for a motor vehicle. More specifically, the invention relates to the production of a light transition from an initial beam to a target beam.
- light sources with semi-conductor elements such as light-emitting diodes, LEDs
- These functions may, for example, include daytime running lights, position lights, direction indicators or dipped beam headlights.
- the use of these small light sources with high luminosity and reduced power consumption also makes it possible to produce original light contours in a compact system and with reduced electrical energy.
- a pixelated light source typically offered in the form of a matrix comprising a large number of light-emitting diodes controlled individually, also makes it possible to create very varied beams: depending on the control chosen, a matrix source can, for example, project an outline or pattern on the road, generate a combination of high beam (HB) and low beam (LB), or provide dynamic and directional lights.
- HB high beam
- LB low beam
- pixel sources may be based on technology other than LEDs.
- pixelated sources with micro-mirrors DMD, for “Digital Micromirror Device” in English
- monolithic sources are known.
- Such a transition may consist in passing from an HB beam to an LB beam, in particular when the vehicle crosses another vehicle.
- Another transition may correspond to the adaptation of the HB or LB beam, from a straight beam to a turning beam.
- Other transitions may be caused by the change in the environment of the vehicle, such as the change in natural light surrounding the vehicle. It is desirable that the light transition does not take place abruptly, both for aesthetic reasons, but also, and above all, for safety reasons so as not to surprise other road users as well as the driver of the vehicle. vehicle.
- the patent application US2017057402A1 proposes for this purpose to define a set of intermediate beams between the initial beam and the target beam. To this end, the luminosity of each of the pixels of the light source varies from an initial value to a target value, passing through intermediate values for each intermediate beam.
- FIGS. 3A to 3H illustrate the luminosity values for the initial beam, the six intermediate beams and the target beam, for a source comprising eight regions denoted PHa to PHh, corresponding respectively to the eight pixels of the light source.
- the present invention improves the situation.
- a first aspect of the invention relates to a method for controlling a pixelated light source of a lighting or signaling system for a light transition from an initial beam to a target beam, the pixelated light source comprising a plurality of pixels, the method comprising the following steps:
- a “pixel” is also called an “elementary light source”.
- a pixelated light source comprises a plurality of elementary light sources.
- a group of pixels can include at least one pixel of the pixelated light source.
- luminosity is understood as the luminous power of the illuminating pixel.
- the pixel can have low, medium or high brightness.
- the luminosity can be represented by the luminous flux whose unit of measurement is the lumen (symbols: SI units).
- the step for defining a target luminosity for each pixel of the pixelated light source from the target beam can comprise a sub-step for converting the target luminosity into target electrical parameters to be applied to the pixel considered to achieve this target brightness.
- the electrical parameters can be a duty cycle of the pulse width modulation signal (or “Pulse Width Modulation” in English terms, hence the commonly used abbreviation PWM) and/or an electric current.
- PWM Pulse Width Modulation
- the electrical parameters may be different from one pixel to another.
- the step for successively driving the groups of pixels from an initial brightness to the target brightness of the pixel in these groups consists in applying the target electrical parameters defined in the previous step to each pixel.
- the control consists of a control by modulation of pulse widths by applying the target duty cycle to each pixel.
- the duty cycle associated with them in the initial beam may be different from the duty cycle associated with them in the target beam.
- the groups of pixels for which the luminosity has been modified from the initial luminosity to the target luminosity remain in this latter state until the end of the transition from the initial beam to the target beam.
- the groups of pixels can be driven successively in random order.
- Such an embodiment improves the responsiveness of the method and reduces the computational costs associated with the transition from the initial beam to the target beam.
- the method may further comprise a definition of a sequence of groups, and the groups of pixels may be driven successively according to the defined sequence.
- Such an embodiment makes it possible to improve the visual rendering associated with the transition from the initial beam to the target beam.
- the pixels of a group of pixels can be adjacent.
- the grouping of pixels is based on spatial criteria, which improves the continuous character of the transition and facilitates the control of the groups of pixels.
- the groups of pixels can be predefined.
- the groups of pixels can be defined from the target brightnesses of the pixels of the light source.
- the grouping by target luminosities can be a grouping of the pixels for which the target duty cycles are relatively close (with a difference of +1-5% to 10% for example) or identical.
- the piloting takes place in the successive order of the groups, each of these groups comprising the pixels with similar or identical target duty cycles.
- the group of pixels for which the target duty cycle of each of the pixels of this group is lower than that of the pixels of the other groups can be controlled by first.
- the group of pixels for which the target duty cycle of each of the pixels is higher than that of the pixels of the other groups can be driven first.
- the grouping of the pixels can be determined according to the initial and target brightnesses of the pixels of the groups.
- the pixels of the light source can be grouped into N groups, N being greater than 1, and N depending on a transition time between the initial beam and the target beam.
- the transition can be limited to a given duration, so as not to delay the achievement of the target beam which can in particular fulfill lighting functions improving the driving safety of the vehicle.
- N may further depend on a visual resolution frequency.
- this embodiment makes it possible to ensure that the continuous transition between the beams is actually perceived by a human eye, and that the transition is not carried out too quickly at the risk of appearing abrupt.
- a second aspect of the invention relates to a computer program comprising instructions for implementing the method according to the first aspect of the invention, when these instructions are executed by a processor.
- a third aspect of the invention relates to a motor vehicle lighting or signaling system, comprising a pixelated light source and a pixelated light source control module, in which the pixelated light source comprises a plurality of pixels and the module order includes:
- a first interface configured to receive a transition command from an initial beam to a target beam
- - a processor configured to define, for each pixel of the pixelated light source, a target brightness from the target beam and to group the pixels of the light source into at least two groups of pixels, each group of pixels comprising at least one pixel ; - a second interface configured to successively control the groups of pixels, the control of a group of pixels comprising a modification of the brightness of each pixel of the group, from an initial brightness to the target brightness of the pixel.
- the processor is configured to translate the target brightness into a target electrical parameter.
- the second interface is configured to apply the target electrical parameter to each pixel during the successive driving of the groups of pixels from the initial luminosity to the target luminosity of the pixel.
- Another object of the invention relates to a motor vehicle comprising the lighting and signaling system according to the invention.
- FIG 1 illustrates a lighting or signaling system according to one embodiment of the invention
- FIG 2 is a diagram illustrating the steps of a method according to one embodiment of the invention.
- FIG 3a illustrates an initial beam defining initial pixel intensities of the light source according to one embodiment of the invention
- FIG 3b illustrates a target beam defining target intensities of pixels of the light source according to one embodiment of the invention
- FIG 4 illustrates the result of the definition of groups of pixels for their successive driving, according to an embodiment of the invention
- FIG 5a illustrates the driving of a first group of pixels, according to an embodiment of the invention
- FIG 5b illustrates the control of a second group of pixels, according to an embodiment of the invention
- FIG 5c illustrates the driving of a third group of a single pixel, according to an embodiment of the invention
- FIG 5d illustrates the driving of a fourth group of pixels, according to an embodiment of the invention
- FIG 6 illustrates a structure of a control module of a lighting or signaling system according to one embodiment of the invention.
- Figure 1 shows a lighting system 100 according to one embodiment of the invention.
- the lighting system can comprise a pixelated light source 120.
- the pixelated light source 120 can for example be a matrix of pixels.
- matrix 120 comprises two rows of four pixels 120.1 to 120.8, ie eight pixels in all.
- no restriction is attached to the number of pixels or to their arrangement in the light source 120.
- the invention is advantageously applicable to light sources comprising a large number of pixels, for example several hundreds or even several thousands of pixels.
- the light source 120 can in particular comprise any number of rows and any number of columns. Moreover, no restriction is attached to the shape of the light source 120 which is not necessarily rectangular. For example, some columns, or rows, may include more pixels than other columns, or rows.
- the pixels can be semiconductor elements, such as light-emitting diodes, LEDs.
- Other pixelated sources can be based on technology other than LEDs. In particular, pixelated sources with micromirrors (DMD, for “Digital Micromirror Device” in English) or monolithic sources are known.
- the lighting system 100 further comprises a control module 110 able to control the light source 120, in particular to control the brightness of the pixels of the light source.
- the control of the respective brightnesses of the pixels 120.1 to 120.8 allows the realization of varied light beams, which can correspond in particular to varied light functions.
- the lighting functions may for example include the dipped beam function LB, the main beam function HB, dynamic functions DBL, in particular when cornering, or any other lighting or signaling light function.
- Figure 2 is a diagram illustrating the steps of a method according to one embodiment of the invention.
- the lighting or control system 100 performs an initial function, corresponding to respective brightness values of the pixels 120.1 to 120.8.
- the control module 110 receives a transition command from the initial beam to a target beam.
- a transition can consist in passing from an HB beam to an LB beam, when the vehicle crosses another vehicle.
- Another transition may correspond to the adaptation of the HB to LB beam, from a straight beam to a turning beam.
- Other transitions may be caused by the change in the vehicle's environment, such as the change in natural light surrounding the vehicle. Thus, no restriction is attached to the initial and target beams.
- the transition command may include an identifier of the target beam. No restriction is attached to such an identifier, which can be an identifier among a predetermined set of identifiers of light beams.
- the target beam can be identified by a set of parameters. For example, for a dynamic cornering function, the parameter can be an angle of rotation of the steering wheel.
- the control module 110 determines, for each pixel of the pixelated light source, a target luminosity from the target beam. Such a determination step is well known and is not detailed further.
- the target luminosity values can for example be stored in a memory of the control module 110 or can be determined dynamically from the target beam.
- the control module 110 groups the pixels 120.1 to 120.8 of the light source 120 into at least two groups of pixels.
- the groups of pixels can for example be predefined.
- the pixels can be grouped by zones of the light source 120. In this case, the pixels of the same group are adjacent.
- the groups of pixels can be defined from the respective brightnesses of pixels 120.1 to 120.8. For example, one group may include pixels of lower brightnesses and another group may include pixels of higher brightnesses. No restriction is attached to the criterion used to group the pixels into at least two groups.
- the number N of groups which is any integer N greater than or equal to 2.
- the number N can in particular be determined from a transition duration.
- the transition duration can be predetermined or can be indicated in the transition command received at step 200.
- the transition duration can in particular be of the order of a second, for example between one and three seconds.
- the number N can further be determined from a visual resolution frequency. Indeed, in order to allow a transition which is perceived as continuous, it is necessary to take into account the frequency of resolution of the human eye.
- Step 203 is optional and will be described later.
- the control module 110 controls a first group of pixels from among the groups of pixels defined in step 202, the control of the first group of pixels comprising a modification of the brightness of each pixel of the group, from a initial brightness to target pixel brightness.
- the initial luminosity is defined from the initial beam.
- the control module 110 checks whether at least one group has not been controlled according to step 204. If at least one group remains to be controlled, the method returns to the step 205. Otherwise, all the groups of pixels have been driven successively, and the method returns to step 200, until a new transition command is received.
- the target beam then becomes the initial beam of a following iteration of the method according to the invention.
- the fact of grouping the pixels and successively driving these groups by switching the luminosity of the pixels of a group directly from an initial luminosity to the target luminosity makes it possible to operate a continuous transition, without the need to determine intermediate luminosity for the set of pixels as in the prior art.
- the continuous character of the transition is made possible by “spatial” control of the pixels, rather than by a gradual variation of the intensities of all the pixels.
- the method according to the invention can thus be implemented in the case of a light source 120 with a large number of pixels, such as several hundred or even several thousand pixels.
- the control module 110 can define a sequence ordering the groups defined at step 202.
- the control module 110 thus controls the groups of pixels according to the sequence defined at step 202. step 203.
- No restriction is attached to the way in which the sequence is defined in step 203.
- the sequence can for example be predefined. Alternatively, it can be determined as a function of the initial and target luminosities of the pixels of the groups. For example, the group of pixels whose differences between the initial and target brightnesses are maximum can be driven first, or alternatively last.
- the sequence can be determined according to the spatial distribution of the groups. The sequence is thus based on a spatial order of the groups. Defining a sequence improves the visual rendering associated with the transition between the initial beam and the target beam.
- FIG. 3a illustrates an initial light beam 300 defining initial light intensity levels for the pixels of the light source 120, according to one embodiment of the invention.
- the initial beam 300 is shown as part of the light source 120 with eight pixels 120.1 to 120.8. However, it can be generalized to any pixelated light source, regardless of the number of pixels and their respective arrangements.
- Eight initial intensities 300.1 to 300.8 thus correspond respectively to pixels 120.1 to 120.8. No restriction is attached to the initial light intensities 300.1 to 300.8 defined by the initial beam 300.
- FIG. 3b illustrates a target light beam 310 defining target light intensity levels for the pixels of the light source 120, according to one embodiment of the invention.
- Target beam 310 is shown as part of light source 120 with eight pixels 120.1-120.8. However, it can be generalized to any pixelated light source, regardless of the number of pixels and their respective arrangements.
- Eight target intensities 310.1 to 310.8 thus correspond respectively to pixels 120.1 to 120.8. No restriction is attached to the target light intensities 310.1 to 310.8 defined by the target beam 310.
- the method according to the invention described in FIG. 2 is applied to a transition between the initial beam 300 and the target beam 310, by way of illustration only.
- FIG. 4 presents the result of step 202 of grouping pixels 120.1 to 120.8 of the light source.
- FIG. 4 illustrates the respective light intensities of the pixels for the initial beam 300 of FIG. 3a, it is understood that each light intensity represents the pixel with which it is associated.
- the references 120.1 to 120.8 are thus placed opposite each of the columns representing the light intensities.
- pixels 120.1, 120.2 and 120.3 are grouped into a first group 400.1.
- the pixels 120.1 to 120.3 can in particular be grouped together because their target brightnesses 310.1 to 310.3 in FIG. 3b are close, and because the pixels 120.1 to 120.3 are adjacent. More generally, the criterion retained in this example is to group the pixels which are spatially close in the light source 120 and whose target intensities are close.
- Pixels 120.4 and 120.5 are thus grouped in a second group 400.2.
- Pixel 120.6 alone constitutes the third group 400.3.
- Pixels 120.7 and 120.8 are grouped in the fourth group 400.4.
- FIG. 4 thus presents the result of the method at the end of step 202.
- step 203 it is considered that a sequence has been defined in step 203, and that the groups 400.1 to 400.4 are driven successively according to the following sequence: 400.1 then 400.2 then 400.3 then 400.4.
- Such a sequence is given for illustrative purposes only: another sequence could have been defined, for example from 400.4 to 400.1 , or a random order could have been used.
- FIG. 5a illustrates the result of piloting the first group 400.1, following a first iteration of step 204, according to one embodiment of the invention.
- the first group 400.1 is controlled so as to modify the light intensities of the pixels 120.1, 120.2 and 120.3 from their initial intensities 300.1, 300.2 and 300.3 to their target intensities 310.1, 310.2 and 310.3, without going through intermediate light intensities.
- FIG. 5b illustrates the result of piloting the second group 400.2, following a second iteration of step 204, according to one embodiment of the invention.
- the second group 400.2 is driven so as to modify the light intensities of the pixels 120.4 and 120.5 from their initial intensities 300.4 and 300.5 to their target intensities 310.4 and 310.5, without going through light intensities intermediaries.
- FIG. 5c illustrates the result of piloting the third group 400.3, following a third iteration of step 204, according to one embodiment of the invention.
- the third group 400.3 is controlled so as to modify the light intensity of the pixel 120.6 from its initial intensity 300.6 to its target intensity 310.6, without going through intermediate light intensities.
- FIG. 5d illustrates the result of piloting the fourth group 400.4, following a fourth and last iteration of step 204, according to one embodiment of the invention.
- the fourth group 400.4 is controlled so as to modify the light intensities of the pixels 120.7 and 120.8 from their initial intensities 300.7 and 300.8 to their target intensities 310.7 and 310.8, without going through light intensities intermediaries.
- the target beam 310 is thus produced by successively driving the groups of pixels formed in step 202.
- Figure 6 shows the structure of a control module 110 of a lighting or signaling system 100, according to one embodiment of the invention.
- the control module 110 comprises a processor 601 configured to communicate unidirectionally or bidirectionally, via one or more buses or via a direct wired connection, with a memory 602 such as a "Random Access Memory” type memory, RAM, or a “Read Only Memory” type memory, ROM, or any other type of memory (Flash, EEPROM, etc.).
- memory 602 includes several memories of the aforementioned types.
- the memory 602 is capable of storing, permanently or temporarily, at least some of the data used and/or resulting from the implementation of the method according to the invention.
- the memory 602 can store light intensity values of light beams in correspondence with beam identifiers.
- Memory 602 may also store rules for determining the number N of groups and how to group pixels.
- the memory may further store the transition duration and the visual resolution frequency.
- the processor 601 is capable of executing instructions, stored in the memory 602, for the implementation of the steps of the method according to the invention, described with reference to FIG. 2.
- the processor 602 can be replaced by a microcontroller designed and configured to perform the steps of the method according to the invention, described with reference to Figure 2.
- the control module 110 can further comprise a first interface 603 arranged to receive transition commands.
- the control module 110 may further comprise a second interface 604 capable of controlling the pixels 120.1 to 120.8 of the pixelated light source 120, in particular the groups 400.1 to 400.4 according to the invention.
- the present invention is not limited to the embodiments described above by way of examples; it extends to other variants.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22835368.6A EP4445689A1 (fr) | 2021-12-10 | 2022-12-12 | Pilotage de groupes de pixels d'une source lumineuse pour réaliser une transition lumineuse |
US18/717,312 US20250040005A1 (en) | 2021-12-10 | 2022-12-12 | Driving groups of pixels of a light source so as to produce a light transition |
CN202280080838.9A CN118355731A (zh) | 2021-12-10 | 2022-12-12 | 驱动光源的像素组以便产生光转换 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2113334A FR3130352A1 (fr) | 2021-12-10 | 2021-12-10 | Pilotage de groupes de pixels d’une source lumineuse pour réaliser une transition lumineuse |
FRFR2113334 | 2021-12-10 |
Publications (1)
Publication Number | Publication Date |
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WO2023105082A1 true WO2023105082A1 (fr) | 2023-06-15 |
Family
ID=80595293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/085334 WO2023105082A1 (fr) | 2021-12-10 | 2022-12-12 | Pilotage de groupes de pixels d'une source lumineuse pour réaliser une transition lumineuse |
Country Status (5)
Country | Link |
---|---|
US (1) | US20250040005A1 (fr) |
EP (1) | EP4445689A1 (fr) |
CN (1) | CN118355731A (fr) |
FR (1) | FR3130352A1 (fr) |
WO (1) | WO2023105082A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160309552A1 (en) * | 2013-11-20 | 2016-10-20 | Osram Gmbh | Controlling a luminous means having at least two semiconductor light sources |
US20170057402A1 (en) | 2015-08-27 | 2017-03-02 | Koito Manufacturing Co., Ltd. | Vehicle lamp and vehicle lamp system |
US20170367159A1 (en) * | 2008-06-24 | 2017-12-21 | Eldolab Holding B.V. | Control unit for a led assembly and lighting system |
US20200275542A1 (en) * | 2017-11-14 | 2020-08-27 | Koito Manufacturing Co., Ltd. | Lighting circuit of automotive lamp |
US20200314984A1 (en) * | 2017-12-27 | 2020-10-01 | Denso Corporation | Vehicle front lighting apparatus and disconnection detection method |
WO2021232017A1 (fr) * | 2020-05-15 | 2021-11-18 | Lumileds Llc | Fonctionnement d'une matrice de del dans laquelle la tension d'alimentation électrique est inférieure à la tension directe totale de del |
-
2021
- 2021-12-10 FR FR2113334A patent/FR3130352A1/fr active Pending
-
2022
- 2022-12-12 CN CN202280080838.9A patent/CN118355731A/zh active Pending
- 2022-12-12 EP EP22835368.6A patent/EP4445689A1/fr active Pending
- 2022-12-12 US US18/717,312 patent/US20250040005A1/en active Pending
- 2022-12-12 WO PCT/EP2022/085334 patent/WO2023105082A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170367159A1 (en) * | 2008-06-24 | 2017-12-21 | Eldolab Holding B.V. | Control unit for a led assembly and lighting system |
US20160309552A1 (en) * | 2013-11-20 | 2016-10-20 | Osram Gmbh | Controlling a luminous means having at least two semiconductor light sources |
US20170057402A1 (en) | 2015-08-27 | 2017-03-02 | Koito Manufacturing Co., Ltd. | Vehicle lamp and vehicle lamp system |
US20200275542A1 (en) * | 2017-11-14 | 2020-08-27 | Koito Manufacturing Co., Ltd. | Lighting circuit of automotive lamp |
US20200314984A1 (en) * | 2017-12-27 | 2020-10-01 | Denso Corporation | Vehicle front lighting apparatus and disconnection detection method |
WO2021232017A1 (fr) * | 2020-05-15 | 2021-11-18 | Lumileds Llc | Fonctionnement d'une matrice de del dans laquelle la tension d'alimentation électrique est inférieure à la tension directe totale de del |
Also Published As
Publication number | Publication date |
---|---|
US20250040005A1 (en) | 2025-01-30 |
EP4445689A1 (fr) | 2024-10-16 |
CN118355731A (zh) | 2024-07-16 |
FR3130352A1 (fr) | 2023-06-16 |
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