EP3899859A1 - Procédé de pilotage de module de projection pixélisé pour véhicule automobile - Google Patents
Procédé de pilotage de module de projection pixélisé pour véhicule automobileInfo
- Publication number
- EP3899859A1 EP3899859A1 EP19813022.1A EP19813022A EP3899859A1 EP 3899859 A1 EP3899859 A1 EP 3899859A1 EP 19813022 A EP19813022 A EP 19813022A EP 3899859 A1 EP3899859 A1 EP 3899859A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- image
- road
- projection
- projection module
- reference 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/365—Guidance using head up displays or projectors, e.g. virtual vehicles or arrows projected on the windscreen or on the road itself
-
- 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
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
-
- 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T3/4092—Image resolution transcoding, e.g. by using client-server architectures
Definitions
- the invention relates to the field of vehicle lighting devices
- the invention relates to a method for controlling a pixelated projection module.
- the so-called “Road Writing” technology which consists in perfectly projecting patterns and / or scenes on the road, requires high resolution projection modules.
- the high resolution projection modules have a step of LED ("Light Emitting Diode”) which is very small to allow a display on the road of an image with maximum details.
- An object of the present invention is to respond to the drawbacks of the art
- the subject of the invention is therefore a method of piloting a projection module.
- pixelated for a host vehicle comprising the following steps: - a pattern and / or a reference image that one wishes to project on the road is determined;
- projection is determined from the vertical angle of the projection module relative to the road;
- reference is relative to the height of the host vehicle, the projection distance and the geometric position of each projection module in space;
- the height of the projection module relative to the road is predetermined by the steering device depending on the type and brand of the host vehicle on which the projection module is installed ;
- the inverse deformation matrix is configured so as to anticipate the deformation of the image projected on the road, and have the same perspective as the driver with regard to the image projected on the road. relative to the reference image;
- the change of scale of the distorted image is carried out by an interpolation from the nearest neighbor
- the change of scale of the distorted image is carried out by bi-cubic interpolation;
- the selection of the type of interpolation depends either on the resolution of the projection module, or on the shape of the pattern to be projected.
- FIG. 1 is a representation of a diagram illustrating the method according to the invention.
- Figure 2 is a schematic representation of a pattern and / or a reference image that the device for controlling the projection modules seeks to project onto the road according to the invention
- Figure 3 is a schematic representation of the pattern and / or of an image following a deformation step according to an embodiment of the invention
- Figure 4 is a schematic representation of a pattern and / or an image following an interpolation step according to a first embodiment of the invention.
- Figure 5 is a schematic representation of a pattern and / or an image following an interpolation step according to a second embodiment of the invention
- Figure 6 is a schematic representation of a pattern and / or an image projected on the road according to the first embodiment of the invention
- Figure 7 is a schematic representation of a pattern and / or an image projected on the road according to the second embodiment
- a motor vehicle comprises at least one device for piloting light beam projection modules, said pilot device which is not the subject of this invention, is connected to the control unit of the vehicle.
- the motor vehicle comprising such a control device will be considered in the following description as being a host vehicle.
- a projection module is a pixelated light projector which can be at high or low resolution. In other words, when the projection module has a resolution greater than 1000 pixels, it is a high resolution projection module and conversely at low resolution when said resolution is less than or equal to 1000 pixels. However, there are no restrictions attached to the technology used for the production of high or low resolution projection modules.
- the high-resolution projection modules allow images and / or patterns to be displayed on the road in road writing mode with an impressive level of detail.
- such high resolution modules are thermally very difficult to cool, complex and expensive to implement.
- the invention aims to overcome all of these problems by using lower resolution projection modules in order to perform the road writing function.
- a monolithic source is called a matrix of monolithic electroluminescent elements (in English "monolithic array") arranged in at least two columns by at least two lines.
- the electroluminescent elements can be grown from a common substrate and can be electrically connected so as to be selectively activatable, individually or by subset of electroluminescent elements.
- the substrate can mainly be made of semiconductor material.
- the substrate may include one or more other materials, for example non-semiconductors (metals and insulators).
- each electroluminescent element or group of electroluminescent elements can form a light pixel and can emit light when its or their material is supplied with electricity.
- the configuration of such a monolithic matrix allows the arrangement of selectively activatable pixels very close to each other, with respect to conventional light-emitting diodes intended to be soldered on printed circuit boards.
- the monolithic matrix may include electroluminescent elements, one main dimension of which is elongation, namely the height, is substantially perpendicular to a common substrate, this height being equal to a micrometer.
- control device can be coupled to the previously described control device so as to control the generation and / or projection of a pixelated light beam by the projection module.
- the steering device according to the invention is thus able to control
- Figure 1 is a schematic representation of the diagram relating to the method 100 of piloting a projection module according to the invention. Such a process is a computer program or software embedded in a
- said method comprises a set of steps so that:
- This image 200 can be at low or high resolution and / or of any size, in order to be able to adapt to any type of projection module.
- This image 200 can be selected by the driver of the host vehicle or configured by default by the manufacturer of said vehicle.
- the height of the projection module is determined 120, which is predefined as a function of the type and make of the host vehicle on which the projection module is installed;
- a projection distance of the modules is determined 130 according to the driver's preferences or set by default by the manufacturer. This distance is relative to the starting point of the projection; this projection distance is determined from the vertical angle of the projection module by compared to route 300;
- the potential deformation of the reference image 200 is determined 140, as a function of the height of the host vehicle, the projection distance and the geometric position of each module in space;
- An inverse deformation matrix 150 is applied to the reference image 200, in order to anticipate the deformation of the image projected on the road, and have the same perspective of the driver with regard to the image projected on the road 300 relative to the reference image 200 (see [Figure 3]);
- the scale of the distorted image 210 is changed 160, in order to reach the same resolution as the projection module mounted on the host vehicle.
- There are several methods in order to carry out the change of scale of the distorted image 210 such as a nearest neighbor interpolation (known as “nearest interpolation”) see [ Figure 4], or a linear interpolation, or a bi-cubic interpolation, see [ Figure 5].
- the selection of the type of interpolation depends either on the resolution of the projection module, or on the shape of the pattern and / or image, i.e. it is simple or complex.
- the projection module control device wishes to project simple shapes, such as horizontal and / or vertical lines, it is preferable to select a nearest neighbor interpolation in order to maintain a certain sharpness at the level of the projected image 231, 232.
- a nearest neighbor interpolation in order to maintain a certain sharpness at the level of the projected image 231, 232.
- the shape of the pattern and / or image is more complex, such as oblique lines, curves, or circles, it is preferable to select a bi-cubic or linear interpolation, in order to blur the edges of the shape of the projected pattern and / or add a gray level on the contours of the projected pattern 231, 232.
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1874074A FR3090907A1 (fr) | 2018-12-21 | 2018-12-21 | Procédé de pilotage de module de projection pixélisé pour véhicule automobile |
| PCT/EP2019/083864 WO2020126525A1 (fr) | 2018-12-21 | 2019-12-05 | Procédé de pilotage de module de projection pixélisé pour véhicule automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3899859A1 true EP3899859A1 (fr) | 2021-10-27 |
Family
ID=67441201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19813022.1A Pending EP3899859A1 (fr) | 2018-12-21 | 2019-12-05 | Procédé de pilotage de module de projection pixélisé pour véhicule automobile |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3899859A1 (fr) |
| FR (1) | FR3090907A1 (fr) |
| WO (1) | WO2020126525A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021111021B3 (de) * | 2021-04-29 | 2022-05-12 | HELLA GmbH & Co. KGaA | Verfahren zum Betrieb eines hochauflösenden Scheinwerfers eines Fahrzeugs |
| US20250178519A1 (en) * | 2022-02-04 | 2025-06-05 | Koito Manufacturing Co., Ltd. | Vehicle lamp fitting |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3664114B2 (ja) * | 2001-07-16 | 2005-06-22 | セイコーエプソン株式会社 | プロジェクタによって投写される画像の画像処理 |
| JP5287121B2 (ja) * | 2008-10-14 | 2013-09-11 | 株式会社豊田中央研究所 | 車両用照明装置 |
| US9481287B2 (en) * | 2014-01-21 | 2016-11-01 | Harman International Industries, Inc. | Roadway projection system |
| FR3056775B1 (fr) * | 2016-09-29 | 2021-08-20 | Valeo Vision | Procede de projection d'images par un systeme de projection d'un vehicule automobile, et systeme de projection associe |
-
2018
- 2018-12-21 FR FR1874074A patent/FR3090907A1/fr active Pending
-
2019
- 2019-12-05 WO PCT/EP2019/083864 patent/WO2020126525A1/fr not_active Ceased
- 2019-12-05 EP EP19813022.1A patent/EP3899859A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020126525A1 (fr) | 2020-06-25 |
| FR3090907A1 (fr) | 2020-06-26 |
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