EP4038872A1 - Procede de contrôle d'un dispositif lumineux pour l'emission d'un faisceau lumineux pixelise - Google Patents
Procede de contrôle d'un dispositif lumineux pour l'emission d'un faisceau lumineux pixeliseInfo
- Publication number
- EP4038872A1 EP4038872A1 EP20776216.2A EP20776216A EP4038872A1 EP 4038872 A1 EP4038872 A1 EP 4038872A1 EP 20776216 A EP20776216 A EP 20776216A EP 4038872 A1 EP4038872 A1 EP 4038872A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- light sources
- parameter
- electrical signal
- emitted
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000006870 function Effects 0.000 claims description 49
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000012886 linear function Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
- F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
-
- 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]
-
- 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]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light source
-
- 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
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
-
- 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
-
- 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]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- 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
- H05B47/155—Coordinated control of two or more light sources
-
- 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
-
- 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
- B60Q2300/054—Variable non-standard intensity, i.e. emission of various beam intensities different from standard intensities, e.g. continuous or stepped transitions of intensity
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2380/00—Specific applications
- G09G2380/10—Automotive applications
Definitions
- the invention relates to the field of automotive lighting. More specifically, the invention relates to a method of controlling a light device for the emission of a highly pixelated light beam.
- light modules comprising sufficient selectively controllable light sources, to allow the realization of pixelated light functions, for example containing at least 500 pixels, each pixel being formed by a beam elementary light emitted by one of the light sources.
- This type of module allows the host vehicle to perform, for example, anti-glare road-type lighting functions, in which certain pixels of the high beam are switched off or attenuated to form a dark zone at the level of a target object that should not be dazzle, such as a tracked or passed target vehicle.
- a controller selectively controlling each of the light sources to which is supplied a digital image of a pixelated light beam to be emitted in order to achieve this pixelated light function .
- the digital image defines, for each light source of the light module, a setpoint corresponding to the light intensity of the light pixel that this light source must emit.
- the controller generates from each setpoint a configurable electrical signal that it applies to this source for the emission of a light pixel whose light intensity corresponds to the setpoint, so that this that all the pixels emitted form the pixelated light beam.
- Known light modules allowing the emission of a pixelated light function can include several types of technologies, including light-emitting diode arrays and monolithic pixelated light sources.
- these types of technology involve a great proximity between the light sources, which generates interference (also called in English "cross-talk") in the elementary beams emitted by neighboring light sources.
- interference also called in English "cross-talk”
- the light intensity of a pixel supposedly emitted by one of the light sources does not correspond to the set value associated with this light source.
- only part of the elementary beam emitted by this light source is used to produce the pixel and part of the elementary beams emitted by neighboring light sources are also added to it.
- the resulting light intensity is thus different from the value of expected setpoint, which makes the control of the light module complex and unreliable for the emission of a pixelated light beam conforming to that of the digital image supplied to the controller.
- the present invention falls within this context and aims to respond to the identified problem, by proposing a method for controlling a light device for the emission of a pixelated beam in which the light intensities of the pixels emitted are in accordance with the setpoint values supplied to the lighting device.
- the invention relates to a method for controlling a light device of a motor vehicle comprising at least one light module comprising a plurality of light sources, each of the light sources being arranged to emit a pixel. light, and a controller capable of selectively controlling each of the light sources by applying an electrical signal to it having a parameter of determined value for the emission of a light pixel of given light intensity.
- the method comprises the following steps: a. Prior definition of a function for converting the light module of the value of said parameter into a light intensity emitted by the light sources by at least one measurement of the light intensity emitted by the light sources when the controller applies an electrical signal to them having a predetermined value of said parameter; b.
- each set value being a light intensity of a light pixel of the desired pixelated light beam to be emitted by one of the light sources of said module luminous ;
- vs. Determination from each set value of a value of said parameter using said previously defined conversion function;
- d. Control of each of the light sources by applying said electrical signal to it having said determined value of said parameter for the emission of the pixelated light beam
- control of a light source is meant the control of its luminous intensity to a zero value for the extinction of the corresponding luminous pixel, the reduction of its luminous intensity for the attenuation of the corresponding pixel, the control of its intensity luminous to a predetermined maximum value for the re-lighting of the corresponding pixel, or even the increase of its luminous intensity for the enhancement of the corresponding pixel.
- said electrical signal is an electrical signal modulated in pulse width, said parameter being the duty cycle of this electrical signal.
- the step of prior definition of the conversion function comprises a single sub-step of measuring the light intensity of the light beam emitted by the light module when the controller applies to all the light sources have the same electrical signal exhibiting the same predetermined value of said parameter. It is thus assumed that the interference phenomena between neighboring light sources are homogeneous, so as to simplify the calculation operations of the controller.
- the measurement sub-step may consist of measuring the maximum intensity of the emitted light beam. If necessary, the measurement sub-step can be carried out by applying to all the light sources a pulse-width modulated electrical signal having the same duty cycle of less than
- the previously defined conversion function is a linear function whose coefficient is equal to the ratio between the measured light intensity and the predetermined value of said parameter.
- the conversion function is defined for the whole of the light module, or in other words, the conversion function is the same for all the light sources of the light module.
- the conversion function can be broken down into sub-functions, each being assigned to groups of light sources, or even to single light sources and being defined according to the geographical position of the light source or of the group. of light sources to which it is attributed.
- the step of prior definition of the conversion function may comprise several sub-steps of measuring the light intensity of the light beam emitted by the light module when the controller applies to all the light sources a same electrical signal having several predetermined values of said parameter.
- the previously defined conversion function can be a nonlinear function extrapolated from the measured light intensity values, for example a logarithmic function or a polynomial function.
- the step of prior definition of the conversion function comprises storing said function in a memory of the controller.
- the step of receiving a plurality of set values for remission of a desired pixelated light beam may comprise a substep of receiving a digital image of the desired pixelated light beam, a substep of splitting said digital image into a plurality of regions, each region being associated with one of the light sources of the light module and a sub-step of calculating a set value for each of the light sources of the light module from the region associated with this light source.
- the digital image is split into as many regions as the light module includes light sources, each region corresponding to the pixel that can be emitted by one of these light sources.
- the setpoint assigned to each of the light sources may correspond to the average light intensity in the region associated with that light source.
- the step of determining the values of said parameter comprises the calculation of the image of each set value by the reciprocal function of the previously defined conversion function.
- the pixelated light beam is a light beam comprising a plurality of pixels, for example 500 pixels of dimensions between 0.05 ° and 0.30 °, for example 0.28 °, distributed according to a plurality of rows and columns, for example 20 rows and 25 columns.
- a light source is understood to mean any light source possibly associated with an electro-optical element, capable of being activated and selectively controlled to emit an elementary light beam whose light intensity is controllable. It may in particular be a light-emitting semiconductor chip, a light-emitting element of a monolithic pixelated light-emitting diode, a portion of a light converting element excitable by a light source or else of a light source associated with a liquid crystal or with a micromirror.
- the invention also relates to a computer program comprising 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.
- FIG. 1 shows schematically and partially a lighting device of a motor vehicle
- FIG 2 shows a method of controlling the lighting device of [Fig 1] according to one embodiment of the invention
- FIG 3 represents an example of a pixelated light beam emitted by the light device of [Fig 1] during a step of the method of [Fig 2];
- FIG 4 represents an example of a digital image received by the lighting device of [Fig 1] during a step of the method of [Fig 2];
- FIG. 5 represents an example of splitting the digital image of [Fig 4] during a step of the process of [Fig 2]
- a right lighting device 1 of a motor vehicle comprising two light modules 2 and 3.
- the light module 2 comprises a light source 21 associated with a lens 22 for emitting a crossing type light beam.
- the light module 3 comprises a pixelated light source 31 associated with a lens 32 for emitting a high resolution pixelated HD light beam.
- the pixelated light source 31 is a monolithic pixelated light-emitting diode, each of the light-emitting elements of which forms a light source 31 i which can be activated and selectively controlled by an integrated controller to emit an elementary light beam whose intensity light is controllable and thus forming one of the pixels of the pixelated light beam.
- the pixelated light beam HD comprises approximately 5000 pixels of dimensions 0.2 °, distributed over 135 columns and 37 rows.
- the light device 1 comprises a controller 5 arranged to control the light source 21 and the integrated controller of the pixelated light source 31 so as to selectively control the switching on, switching off and modification of the light intensity of each of the pixels of the pixelated light beam as well as the switching on or off of the beam, as a function of information received from a computer 6 of the host vehicle.
- the controller 5 receives from the computer 6 a digital image of a pixelated light beam to be emitted defining, by gray levels, the light intensities of this beam.
- the controller 5 defines, as a function of this digital image and for each of the light sources 31 i, a duty cycle value and transmits these values to the integrated controller of the pixelated light source 31, which generates and applies to each of the light sources 31 i an electric signal modulated in pulse width according to the associated duty cycle value for the emission of a light pixel, the set of pixels thus forming the pixelated light beam to be emitted.
- [30] There is shown in [Fig 2] a method of controlling the lighting device 1 in particular implemented by the controller 5 and the integrated controller of the pixelated light source 31.
- a conversion function of the light module 3 will be defined. between the values of the duty cycle defined by the controller 5 and the light intensity of the elementary light beams emitted by the light sources 31 i j of the pixelated light source 31.
- the controller 5 will sequentially transmit a plurality of predetermined duty cycle values to the integrated controller of the pixelated light source 31 so that the pixelated light source 31 emits several full pixelized light beams having different intensities.
- the predetermined values are increasing duty cycle values at regular intervals, from 0 to 100%. All the light sources 31 i j are thus controlled in the same way, all the pixels thus being lit for each occurrence of the duty cycle, each light beam thus forming a “blank page” of increasing intensity.
- An example of a “blank page” formed by the pixelated light beam HD emitted by the light module 3 for a duty cycle of 20% has been shown in [FIG. 3].
- the extrapolated conversion function is a quadratic polynomial function defined by the following equation:
- I m 0.76 oc + 0.24 oc 2 , where l m is the light intensity actually emitted and a is the duty cycle of the electrical signal applied to the pixelated light source 31
- step E1 the conversion function is stored in a memory of controller 5.
- the controller 5 receives from the computer 6 a digital image lm of a pixelated light beam to be emitted by the light module 3.
- a digital image lm has been shown in [Fig 4
- Each of the points of the digital image 1m represents a luminous intensity of the desired pixelated light beam at a point in space.
- the controller 5 splits the digital image lm into as many regions Ri as the pixelated light source 31 comprises light sources 31 i , j , each region Ri j thus being associated with one of these light sources 31 i j and corresponding in size and shape to the pixel that can be emitted by this light source 31 i j .
- An example of a split image lm has been shown in [Fig 5].
- the controller 5 calculates, for each of the light sources 31 i j , a setpoint value l, j corresponding to the average light intensity of the region Ri j associated with this light source 31 i j .
- This set value thus corresponds to the light intensity of the pixel to be emitted by this light source 31 i j so that all the pixels form the desired pixelated light beam.
- the controller 5 determines from each of the setpoint values l, j and from the conversion function defined beforehand a duty cycle value a, j .
- the duty cycle value can be determined using the inverse function of the conversion function, defined by the following equation:
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1911048A FR3101691B1 (fr) | 2019-10-04 | 2019-10-04 | Procede de contrôle d’un dispositif lumineux pour l’emission d’un faisceau lumineux pixelise |
| PCT/EP2020/077436 WO2021064063A1 (fr) | 2019-10-04 | 2020-09-30 | Procede de contrôle d'un dispositif lumineux pour l'emission d'un faisceau lumineux pixelise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4038872A1 true EP4038872A1 (fr) | 2022-08-10 |
Family
ID=72356010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20776216.2A Pending EP4038872A1 (fr) | 2019-10-04 | 2020-09-30 | Procede de contrôle d'un dispositif lumineux pour l'emission d'un faisceau lumineux pixelise |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12083949B2 (fr) |
| EP (1) | EP4038872A1 (fr) |
| JP (1) | JP7479461B2 (fr) |
| CN (1) | CN114502425B (fr) |
| FR (1) | FR3101691B1 (fr) |
| WO (1) | WO2021064063A1 (fr) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040239243A1 (en) * | 1996-06-13 | 2004-12-02 | Roberts John K. | Light emitting assembly |
| US6587573B1 (en) | 2000-03-20 | 2003-07-01 | Gentex Corporation | System for controlling exterior vehicle lights |
| US7521667B2 (en) * | 2003-06-23 | 2009-04-21 | Advanced Optical Technologies, Llc | Intelligent solid state lighting |
| ES2893327T3 (es) * | 2007-02-01 | 2022-02-08 | Dolby Laboratories Licensing Corp | Calibración de visualizadores que tienen luz de fondo espacialmente variable |
| US8624824B2 (en) * | 2009-03-19 | 2014-01-07 | Sharp Laboratories Of America, Inc. | Area adaptive backlight with reduced color crosstalk |
| US9591720B2 (en) * | 2015-08-05 | 2017-03-07 | Mitsubishi Electric Corporation | LED display apparatus |
| FR3055980B1 (fr) * | 2016-09-15 | 2019-06-28 | Valeo Vision | Systeme optique pour faisceau lumineux pixelise |
| FR3056071B1 (fr) * | 2016-09-15 | 2020-11-13 | Valeo Vision | Procede calibrage de l'intensite d'un courant electrique d'alimentation de sources lumineuses electroluminescentes pour obtenir une lumiere uniforme |
| US9769898B1 (en) * | 2016-12-08 | 2017-09-19 | Nxp B.V. | Adjusted pulse width modulation (PWM) curve calculations for improved accuracy |
| FR3065818B1 (fr) * | 2017-04-28 | 2019-04-26 | Valeo Vision | Module lumineux pour un vehicule automobile configure pour projeter un faisceau lumineux formant une image pixelisee |
| KR101970249B1 (ko) * | 2017-05-29 | 2019-04-18 | 엘지전자 주식회사 | 차량용 램프 및 차량 |
| FR3086723B1 (fr) * | 2018-09-28 | 2022-08-12 | Valeo Vision | Source lumineuse matricielle a gradation de l’intensite lumineuse |
| FR3101693A1 (fr) * | 2019-10-04 | 2021-04-09 | Valeo Vision | Procede d’adaptation de consignes pour une unite d’eclairage numerique d’un vehicule automobile |
| JP7590411B2 (ja) * | 2020-03-26 | 2024-11-26 | 株式会社小糸製作所 | 車両用灯具システムおよびそのコントローラ |
| US11743989B2 (en) * | 2020-12-15 | 2023-08-29 | Lumileds Llc | Voltage supply amplitude modulation driving outlier microLEDs |
-
2019
- 2019-10-04 FR FR1911048A patent/FR3101691B1/fr active Active
-
2020
- 2020-09-30 CN CN202080070087.3A patent/CN114502425B/zh active Active
- 2020-09-30 JP JP2022520629A patent/JP7479461B2/ja active Active
- 2020-09-30 US US17/766,484 patent/US12083949B2/en active Active
- 2020-09-30 EP EP20776216.2A patent/EP4038872A1/fr active Pending
- 2020-09-30 WO PCT/EP2020/077436 patent/WO2021064063A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US12083949B2 (en) | 2024-09-10 |
| JP2022551277A (ja) | 2022-12-08 |
| FR3101691B1 (fr) | 2022-07-08 |
| WO2021064063A1 (fr) | 2021-04-08 |
| US20230278484A1 (en) | 2023-09-07 |
| CN114502425B (zh) | 2024-08-13 |
| JP7479461B2 (ja) | 2024-05-08 |
| CN114502425A (zh) | 2022-05-13 |
| FR3101691A1 (fr) | 2021-04-09 |
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