EP3972874A1 - Method for controlling a luminous device with a view to emitting a pixelated light beam - Google Patents
Method for controlling a luminous device with a view to emitting a pixelated light beamInfo
- Publication number
- EP3972874A1 EP3972874A1 EP20723438.6A EP20723438A EP3972874A1 EP 3972874 A1 EP3972874 A1 EP 3972874A1 EP 20723438 A EP20723438 A EP 20723438A EP 3972874 A1 EP3972874 A1 EP 3972874A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- digital image
- created
- function
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 230000009466 transformation Effects 0.000 claims description 9
- 238000013519 translation Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
-
- 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
- B60Q1/1415—Dimming circuits
- B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
- B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
-
- 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
- B60Q1/06—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 adjustable, e.g. remotely-controlled from inside vehicle
- B60Q1/08—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 adjustable, e.g. remotely-controlled from inside vehicle automatically
- B60Q1/085—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 adjustable, e.g. remotely-controlled from inside vehicle automatically due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3138—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using arrays of modulated light sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
-
- 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
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/05—Special features for controlling or switching of the light beam
- B60Q2300/056—Special anti-blinding beams, e.g. a standard beam is chopped or moved in order not to blind
-
- 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
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/10—Indexing codes relating to particular vehicle conditions
- B60Q2300/13—Attitude of the vehicle body
- B60Q2300/132—Pitch
-
- 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
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/10—Indexing codes relating to particular vehicle conditions
- B60Q2300/13—Attitude of the vehicle body
- B60Q2300/136—Roll
-
- 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
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/30—Indexing codes relating to the vehicle environment
- B60Q2300/32—Road surface or travel path
- B60Q2300/324—Road inclination, e.g. uphill or downhill
-
- 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
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/40—Indexing codes relating to other road users or special conditions
- B60Q2300/42—Indexing codes relating to other road users or special conditions oncoming vehicle
-
- 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
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
Definitions
- the invention relates to the field of automotive lighting and / or signaling.
- the invention relates to a method of controlling a light device for the emission of a pixelated light beam.
- devices comprising enough light sources that can be activated selectively associated with an optical device, to allow the realization of pixelated light functions, for example containing at least 500 pixels, each pixel being formed by an elementary light beam emitted by one of the light sources.
- pixelated light functions for example containing at least 500 pixels, each pixel being formed by an elementary light beam emitted by one of the light sources.
- this type of device makes it possible, for example, in particular to perform anti-dazzling road-type lighting functions, in which certain pixels of the main beam are switched off or attenuated at the level of.
- this type of device makes it possible to display images on a screen, in particular for the purpose of warning road users. It should be noted that these functions are dynamic functions whose content is required to change regularly during the movement of the vehicle.
- a central computer receives information from various sensors such as a camera filming the road, a steering wheel angle sensor, or a navigation system, determines what type of pixelated light function must be transmitted by the device, and periodically sends an instruction to transmit this desired function to the device.
- the instructions sent by the computer generally contain the type of function and the associated parameters, such as for example the position of a vehicle that should not be dazzled.
- a control device each time a transmission instruction is received, defines each light source what light intensity this light source must emit so that the elementary beam that it emits produces the pixel necessary to achieve the pixelated light function desired.
- Known light devices allowing the emission of a light function pixelated can include several types of light sources and optical device.
- the different types of light sources we can identify in particular light emitting diode arrays, monolithic pixelated light sources, light sources associated with a matrix of micro mirrors, laser sources associated with a scanning system and with a conversion material. or even light sources associated with an LCD type screen.
- each type of light source implies intrinsic emission characteristics for the light device, in particular in terms of shape and homogeneity of each pixel produced by each light source, as well as in terms of overall homogeneity of the pixelated beam produced. by the light device due to the crosstalk of the elementary beams emitted by light sources adjacent to each other and manufacturing tolerances of each of the light sources. These intrinsic characteristics are amplified as a function of the type of optical device used in the lighting device, which in particular introduces distortion and vi gnettage defects in the pixelated beam.
- the invention relates to a method for controlling a light device of a motor vehicle comprising one or more light modules, each module comprising a plurality of light sources and an optical device arranged to emit a pixelated light beam in a predetermined emission zone, the method comprising the following steps:
- the method firstly makes it possible to generate a digital image which corresponds substantially to the portion of the pixelated light function which must be emitted by the module in the emission zone that it is capable of. to address.
- This predetermined emission zone is defined in particular by the position of the light module, its orientation, in particular vertical and / or horizontal, and its field of view. Since the digital image is created independently of the characteristics relating to the types of light sources and optical device present in the light module, this step allows the process to be implemented for all types of light device. Then the digital image is corrected to be suitable for these types of light sources and optical devices. The correction can thus be easily configured according to these types, without the step of creating the digital image being affected.
- the method according to the invention periodically receives instructions for transmitting a desired pixelated light function, each instruction possibly being the transmission of a new pixelated light function different from the pixelated light function emitted. following G instruction previously received or the emission of a pixelated light function in which only one or more parameters are different from those of the light function emitted following the instruction previously received. If necessary, a new digital image is created for each transmission instruction received.
- the instructions received can be instructions for transmitting one or more pixelated light functions, chosen in particular from: a regulatory photometric function, an anti-glare function, a route following function, a ground writing function and an road marking function, accompanied by one or more parameters necessary for the execution of said function, and in particular the position of an object not to be illuminated, one or more characteristics relating to the vehicle or to the movement of the vehicle or even a type of pictogram or pattern.
- Each instruction received can thus accumulate several pixelated light functions.
- the digital image created comprises a predetermined number of pixels, each pixel for example containing a gray level. If desired, the predetermined number of pixels can be the same as the number of pixels that can be emitted by the light module. As a variant, the predetermined number of pixels can be different from the number of pixels that can be emitted by the light module. Where applicable, the digital image created is independent of the resolution of the light module.
- the digital comprises the selection of at least one photometric image stored in memory corresponding to a predetermined regulatory photometric function to form a base image in the frame according to the transmission instruction received, the digital image being created from the base image.
- the received transmission instruction contains an identifier of said predetermined regulatory photometric function. Thanks to this characteristic, it is possible to define very simply and quickly a digital image for each light module so that the light device emits a regulatory photometric function.
- the photometric image contains as many pixels as the predetermined number of pixels of the digital image. It therefore extends entirely within the frame corresponding to the predetermined emission zone of the light module.
- Each pixel of the photometric image can represent a light intensity value of said predetermined regulatory photometric function at a given point in space, for example in a projection on a screen.
- the photometric image stored in memory can thus represent a portion or the whole of a projection of the predetermined regulatory photometric function in the predetermined emission zone of the light module. It may in particular be a function of crossing type, road type, motorway type, the outline of which and in particular the cutoff as well as the light distribution are defined by law.
- the transmission instruction received may include an identifier of a given regulation so that a photometric image corresponding to the desired photometric function in accordance with said regulation is selected.
- a transformation can be applied to the pho tometric image selected as a function of the transmission instruction received to form the base image, it being understood that the frame corresponding to the area of predefined emission of the light module remains fixed during the transformation. If applicable, the received transmission instruction contains an instruction of the type of transformation to be applied as well as the values necessary to apply the transformation to the selected photometric image.
- this characteristic makes it possible to perform a function called dynamic following of turns, in particular according to which the lighting device emits a beam of the crossing type, at least a portion of which is transformed to illuminate the turn.
- the received transmit instruction may contain, for example, a steering wheel angle and a translation or stretch is applied to the selected photo metric image according to this steering wheel angle.
- this characteristic makes it possible to perform a function
- the received transmission instruction may contain, for example, an adaptation factor depending on the speed of the vehicle and a stretch or contraction is applied to the photometric image according to this adaptation factor.
- the stretch or contraction can be applied vertically and / or horizontally so that the light flux emitted by the light module remains unchanged.
- the step of creating the digital image may include the
- G received transmission instruction can contain a fusion instruction and possibly a fusion coefficient.
- the two selected photometric images are merged taking into account said melting coefficient. This characteristic makes it possible to perform a so-called transition function between two regulatory photometric functions.
- creating the digital image includes selecting at least one layer stored in memory and / or building at least one layer, and positioning the layer in the frame to form a base image in the frame based on G transmission instruction received, the digital image being created from the base image.
- the stored or constructed layer may in particular correspond to a pictogram, such as an arrow, a road sign image or even a pedestrian crossing, or to a pattern such as a marking on the ground.
- pictogram such as an arrow, a road sign image or even a pedestrian crossing
- pattern such as a marking on the ground.
- “layer” is understood to mean an image of dimensions smaller than those of the frame and of which all the pixels have a zero value except for the pixels forming the pictogram or the pattern. If applicable,
- the G transmission instruction received contains an identifier of the layer to be selected or construct and coordinates to position the layer in the frame.
- This characteristic makes it possible to perform a function of the writing type on the ground according to which the lighting device emits a passing beam in which a pictogram has been materialized, or a function of the marking type on the ground according to which the lighting device emits a passing beam in which were materialized longitudinal lines.
- the base image can be constructed by adding the layer (s) to a black image filling the frame, or as a variant by subtracting the layer (s) from a white image filling the frame, or alternatively by adding or subtracting the frame. or layers with a photo metric image corresponding to a regulatory photometric function such as previously obtained.
- the received transmission instruction contains an identifier of the transformation (s) to be applied to the layer as well as the parameters allowing the execution of this or these transformation (s).
- an anti-aliasing filter can be applied to the created digital image.
- the step of creating the digital image comprises the selection of one or more masks stored in memory and / or the construction of one or more masks as a function of the transmission instruction received, the the digital image being created by successive application of said mask (s) selected and / or constructed to the base image.
- the term mask is understood to mean a matrix of dimensions smaller than or identical to those of the frame, and in which each cell has a coefficient between 0 and 1.
- the transmission instruction received contains an identifier of each type of mask to select or construct and the parameters necessary for the selection or construction and for the application of each mask to the base image, such as the coefficient, for example.
- G applying a mask to the base image may consist of multiplying the value of each pixel of the base image or of an area of the base image by the coefficient of the cell of co ordinates corresponding to those of said pixel.
- an anti-glare mask is constructed
- the transmission instruction received contains positioning coordinates of the dark tunnel in the mask.
- the coefficient of all the cells corresponding to the dark tunnel can be 0.
- the dark tunnel thus created makes it possible to perform an adaptive road-type function according to which the lighting device emits a beam illuminating the entire road except of a zone located at the level of a followed or crossed target vehicle to avoid dazzling it.
- the coefficient of all the cells corresponding to the dark tunnel is greater than or equal to 0 and strictly less than 1.
- the dark tunnel thus created makes it possible to perform an anti-dazzling function according to which the illuminated light device emits a beam illuminating the whole. away from the road except for an area near a traffic sign to avoid dazzling reverse reflection.
- the received transmit instruction may contain an identifier of the shape of the dark tunnel, the dark tunnel being selected or constructed to present the identified shape. For example, it could be a rectangle or a hexagon.
- the received transmit instruction may contain sharpness parameters, the dark tunnel being selected or constructed to have an intensity gradient around its periphery corresponding to the sharpness parameters.
- an attenuation mask comprising a vertical or oblique attenuation gradient is applied to all or part of the base image.
- the received transmit instruction contains an identifier of a gradient type.
- the coefficient of each cell of the attenuation mask can be a function of the inverse of the square of the distance of the corresponding pixel of the pixelated light beam emitted by the light module relative to the position of the light module. This achieves homogenization of the intensity of the pixelated light beam along the predetermined emission zone.
- the coefficient of each cell can be a function of the overlap of the corresponding pixel of the pixelated light beam emitted by the light module with another light beam emitted by another light module of the same light device or of another light device.
- the attenuation mask can be centered on a pictogram or pattern formed in the base image.
- digital created comprises a sampling of the digital image created according to the number of light sources of the light module. This adapts the digital image created to the resolution of the light module.
- the step of correcting the digital image created comprises
- the correction step may comprise the application of a filter whose coefficients have been determined beforehand to compensate for the geometric aberrations of the distortion type introduced by the types of light sources and of optical device of the light module. , these coefficients being pax example determined by means of a polynomial modeling of the phenomenon of distortion. If desired, the filter coefficients can be further determined.
- the correcting step can comprise the application of an attenuation mask to the digital image corrected to prevent light intensity drops at the edges of the frame.
- the corrected digital image is transmitted to a control unit of the light module, which selectively controls each of the light sources of the light module so that this light source emits an elementary light beam forming a pixel of luminous intensity corresponding to the value of the corresponding pixel of the corrected digital image.
- the steps of creating and correcting the digital image can be implemented by a single controller separate from the control unit of the light module.
- the term “light source” is understood to mean any light source possibly associated with an electro-optical element, capable of being activated and selectively controlled in order to emit an elementary light beam, the light intensity of which can possibly be controlled.
- the subject of the invention is also a computer program comprising a program code which is designed to implement the method according to the invention.
- the invention also relates to a data medium on which the computer program according to the invention is recorded.
- the invention also relates to a light device comprising at least one light module comprising a plurality of light sources and a control unit for selectively controlling each of the light sources, the light device comprising a controller arranged to control the unit control, the lighting device implementing the method according to the invention.
- FIG.l shows a lighting device of a motor vehicle
- FIG.2 shows a top view of the emission zones of the light modules of the device of [Fig. 1];
- FIG.3 shows a projection on a screen of the emission zones of the light modules of the device of [Fig. 1];
- FIG.4 shows a method of controlling the device of [Fig. 1] according to a first embodiment of the invention
- FIG.5 shows a top view of the light beams emitted by the device
- FIG. 6 shows a projection on a screen of the light beams emitted by the device of [Fig. 1] control by the method according to [Fig. 4];
- FIG. 7 shows a method of controlling the device of [Fig. 1] according to a second embodiment of the invention
- FIG.9 shows a projection on a screen of the light beams emitted by the device of [Fig. 1] control by the method according to [Fig. 6].
- This lighting device 1 comprises three light modules 2, 3 and 4 each capable of emitting a light beam in a predetermined emission zone Z2, Z3 and Z4 respectively.
- the predetermined emission zones Z2 to Z4 are shown which can be addressed by each of the light modules 2 to 4 in a top view in [FIG. 2] and in projection on a screen in [Fig. 3].
- Light module 2 has a source light 21 associated with a lens 22 to emit a light beam with a flat cut-off in the zone Z2.
- Each of the light modules 3 and 4 comprises a pixelated light source 31 and 41 associated with a lens 32 and 42 for emitting a pixelated light beam in the zone Z3 and Z4.
- the pixelated light sources 31 and 41 are monolithic pixelated light-emitting diodes, each of the light-emitting elements of which forms a light source which can be activated and selectively controlled by a control unit 33 and 43 to emit an elementary light beam. whose light intensity is controllable and thus forming one of the pixels of the pixelated light beam.
- the lighting device 1 comprises a controller 5 arranged to control the control units 33 and 43 so as to selectively control each of the light emitting elements of the light sources 31 and 41 as well as the light source 21, depending on instruction to transmit a desired pixelated light function received from a controller 6.
- FIG.4 a method of controlling the lighting device 1 for the emission of a desired pixelated light function according to one embodiment of the invention.
- the control of this light module 2 by the controller 5 will not be described below.
- a first step E1 the controller 5 receives from the controller 6 at a given time an instruction It for issuing a crossover type function according to European regulations, plus a dynamic turn following function for a angle of X degrees to be achieved by translation, and a function for writing on the ground a pictogram limiting the speed to 110 km / h, to be positioned on the road according to a set of Y coordinates with an anamorphosis, the intensity of the writing function on the ground to be attenuated due to the projection distance close to the vehicle and the overlap with the left vehicle lighting device.
- the controller 5 On receipt of the instruction, in a second step E2, the controller 5 will create for each of the light modules 3 and 4 a digital image 13 and 14 providing a portion of the desired pixelated light function in a frame C3 and C4, the frames C3 and C4 corresponding to the predetermined emission zones Z3 and Z4 which these light modules 3 and 4 can address.
- the digital images 13 and 14 which will be created comprise a predetermined number of pixels and completely fill the frames C3 and C4. It will be noted that the dimensions of the frames C3 and C4 have been defined beforehand with respect to the dimensions and position of the predetermined emission zones Z3 and Z4 and in particular according to the positions of the light modules 3 and 4, their inclinations and their positions. fields of view.
- the controller 5 selects in its memory an IP photometric image corresponding to a crossover type function according to the control room.
- IP photometric image IP showing a projection onto a screen of an upper portion of a function of the crossover type according to European regulations, presenting a cut.
- the controller selects in its memory a layer C re having a pictogram of speed limit at 110 km / h and adds this layer to a black image by positioning it at a position corresponding to the set of coordinates Y.
- controller 5 applies a horizontal translation corresponding to the angle of X degrees to the IP photometric image in frame C3 to form a base image IB3. It can thus be seen that part of the IP photometric image has thus left the frame C3.
- the controller applies an anamorphosis to layer C to form a base image IB4.
- the controller further applies an anti-aliasing filter to the IB4 image.
- the controller 5 selects from its memory a first attenuation mask comprising a vertical intensity gradient M1 and a second attenuation mask comprising an oblique intensity gradient M2, each mask M1 and M2 being a matrix of dimensions identical to those of the frame C4 and whose cells contain coefficients between 0 and 1.
- the vertical gradient of the mask M1 has been calculated so that the coefficient of each cell of the mask M1 corresponds to the inverse of the square of the distance of a corresponding pixel in zone Z4.
- the oblique gradient of the mask M2 was calculated so that the co efficient of each cell of the mask M2 decreases linearly obliquely upwards.
- the controller 5 thus successively applies the masks M1 and M2 to the base image IB4, by multiplying the values of each pixel of the base image IB4 by the coefficient of the cell with the same coordinates of the masks M1 and M2 to obtain a digital image 14.
- no mask is applied to the base image IB3, the base image IB 3 thus becoming the digital image 13.
- the digital images 13 and 14 which were created during step El are independent of the intrinsic emission characteristics of each of the light modules 3 and 4 in the predetermined emission zones they address, namely the type and resolution of the pixelated light source and the type of optical device of these modules. These digital images 13 and 14 can thus be used for any type of light module.
- each digital image 13 and 14 will be corrected by the controller 5 according to the types of light sources 31 and 41 and of optical device 32 and 42 and according to the resolution of the light modules 3 and 4.
- the digital images 13 and 14 are sampled by the controller 5 to obtain digital images 13 'and 14' of resolution corresponding to those of the light modules 3 and 4.
- the controller 5 then applies a filter to the sampled digital images 13 'and 14' to adapt the values of the pixels of these images so as to compensate for the shape and the homogeneity of the pixels created by the light emitting elements of the sources read.
- the controller 5 then applies a homogeneity mask making it possible to compensate for the relative homogeneity differences of the pixels between them due to the manufacturing tolerances of the light sources.
- controller 5 applies a translation to the image 13 ’up cor
- the attenuation mask M3 has been determined so that the coefficients of the attenuation mask M3 introduce an intensity gradient at the edges of the frame C3.
- a fourth step E4 the corrected digital images 13 'and 14' are transmitted to the control units 33 and 43 of the modules 3 and 4, which selectively control each of the light emitting elements of the light sources 31 and 41 for the emission of an elementary light beam forming in the predetermined emission zone Z3 and Z4 a pixel whose intensity corresponds to the value of the corresponding pixel in the corrected digital image.
- a top view of the pixelated beams L3 and L4 emitted by the light modules 3 and 4, as well as the beam L2 emitted by the light module 2 has thus been shown in [fig.5], and in [Lig. 6] a projection of these beams L3 and L4 on a screen. It will be noted that the beam L4 is superimposed on the beam L2 so as to make the pictogram of the speed limit at 110 km / h appear highlighted.
- the controller 5 With each new instruction received, the controller 5 thus generates new digital images for the light modules 3 and 4.
- a first step E1 the controller 5 receives from the controller 6 at a given instant an instruction It for issuing a function of road type according to European regulations, added to an anti-glare function of the type rectangle with blurred edges for a crossed target vehicle positioned according to X coordinates, and of a single line type marking function of the given Y equation.
- the controller 5 will create for each of the light modules 3 and 4 a new digital image 13 and 14 providing a portion of the desired pixelated light function in the frames C3 and C4.
- the controller 5 selects in its memory an IP photometric image corresponding to a road-type lighting function according to European regulations.
- the controller constructs a layer C (Y) comprising a pattern in the form of a pair of lines corresponding to the given Y equation and adds this layer to a black image.
- the IP photometric image thus constitutes an IB 3 base image and the layer C added to the black image constitutes an IP4 base image.
- the controller 5 constructs an anti-glare mask ME in the form of a matrix of dimensions identical to those of the frame C3 and in which a rectangular zone of dimensions and positions defined as a function of the coordinates X has a zero coefficient to form a dark tunnel.
- the coefficients of the edges of the rectangular area were determined to form intensity gradients on the edges of the dark tunnel.
- the controller 5 thus applies the ME mask to the base image IB 3 to form a digital image 13.
- controller 5 selects in its memory the first mask
- each digital image 13 and 14 will be corrected by the controller 5 according to the types of light sources 31 and 41 and of optical device 32 and 42 and according to the resolution of the light modules 3 and 4.
- the digital images 13 and 14 are sampled by the controller 5 to obtain digital images 13 "and 14" of resolution corresponding to those of the light modules 3 and 4.
- the controller 5 then applies a filter to the sampled digital images 13 'and 14' to adapt the values of the pixels of these images so as to compensate for the shape and the homogeneity of the pixels created by the light emitting elements of the sources read.
- the controller 5 then applies a homogeneity mask making it possible to compensate for the relative homogeneity differences of the pixels between them due to the manufacturing tolerances of the light sources.
- a fourth step E4 the corrected digital images 13 'and 14' are transmitted to the control units 33 and 43 of the modules 3 and 4, which selectively control each of the light emitting elements of the light sources 31 and 41 for the emission of an elementary light beam forming in the predetermined emission zone Z3 and Z4 a pixel whose intensity corresponds to the value of the corresponding pixel in the corrected digital image.
- the control units 33 and 43 of the modules 3 and 4 selectively control each of the light emitting elements of the light sources 31 and 41 for the emission of an elementary light beam forming in the predetermined emission zone Z3 and Z4 a pixel whose intensity corresponds to the value of the corresponding pixel in the corrected digital image.
- the first step of the process must be developed only once, and that its updating, for example to integrate new functions, can be done in a simple way, without having to take into account any intrinsic characteristic.
- module such as the type of light source used.
- the second adaptation step can also be easily developed for any type of light module, as it does not take into account the type of digital image created upstream.
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1905254A FR3096433B1 (en) | 2019-05-20 | 2019-05-20 | PROCESS FOR CONTROL OF A LUMINOUS DEVICE FOR THE EMISSION OF A PIXELIZED LIGHT BEAM |
PCT/EP2020/063032 WO2020234021A1 (en) | 2019-05-20 | 2020-05-11 | Method for controlling a luminous device with a view to emitting a pixelated light beam |
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EP3972874A1 true EP3972874A1 (en) | 2022-03-30 |
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EP20723438.6A Pending EP3972874A1 (en) | 2019-05-20 | 2020-05-11 | Method for controlling a luminous device with a view to emitting a pixelated light beam |
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US (1) | US12071067B2 (en) |
EP (1) | EP3972874A1 (en) |
JP (1) | JP2022533730A (en) |
CN (1) | CN113874251A (en) |
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FR3116882B1 (en) * | 2020-11-27 | 2022-12-30 | Valeo Vision | Process for controlling a pixelated light source by interpolation of instructions |
FR3134168B1 (en) * | 2022-03-31 | 2024-07-26 | Valeo Vision | METHOD FOR CONTROLLING A LIGHTING DEVICE |
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US9955551B2 (en) * | 2002-07-12 | 2018-04-24 | Yechezkal Evan Spero | Detector controlled illuminating system |
JP2007182151A (en) * | 2006-01-06 | 2007-07-19 | Nissan Motor Co Ltd | Vehicular headlamp and method of controlling same |
JP5287121B2 (en) | 2008-10-14 | 2013-09-11 | 株式会社豊田中央研究所 | Vehicle lighting device |
US8733939B2 (en) * | 2012-07-26 | 2014-05-27 | Cloudcar, Inc. | Vehicle content projection |
AT515996B1 (en) | 2014-06-23 | 2016-09-15 | Zizala Lichtsysteme Gmbh | Method and headlight for generating a light distribution on a roadway |
WO2016113818A1 (en) | 2015-01-16 | 2016-07-21 | パナソニックIpマネジメント株式会社 | Illumination device, vehicle, and control method for illumination device |
CN112026638B (en) * | 2015-04-10 | 2024-09-27 | 麦克赛尔株式会社 | Vehicle with a vehicle body having a vehicle body support |
US10670859B2 (en) * | 2015-12-30 | 2020-06-02 | Infineon Technologies Ag | High efficiency digital light processing engine |
FR3048392B1 (en) | 2016-03-02 | 2019-04-05 | Valeo Vision | ANTI-GLARE PROJECTOR |
JP2019038279A (en) | 2017-08-22 | 2019-03-14 | スタンレー電気株式会社 | Control device of vehicle lamp fitting and vehicle lamp fitting system |
FR3086611B1 (en) * | 2018-10-02 | 2021-04-16 | Valeo Vision | PROCESS FOR CONTROLLING A LIGHTING DEVICE FOR THE EMISSION OF A NON-GLAZING ROAD LIGHTING BEAM |
US11480854B2 (en) * | 2018-12-26 | 2022-10-25 | Lumileds Llc | Vehicle side and rear exterior illumination and projection |
US11318878B2 (en) * | 2019-10-14 | 2022-05-03 | Infineon Technologies Ag | Interfaces for cost effective video communication within advanced vehicle headlamp circuits |
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US12071067B2 (en) | 2024-08-27 |
US20220203883A1 (en) | 2022-06-30 |
FR3096433B1 (en) | 2021-05-21 |
FR3096433A1 (en) | 2020-11-27 |
WO2020234021A1 (en) | 2020-11-26 |
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