WO2015004339A1 - Système et procédé de commande pour dispositif de génération d'images à balayage, dispositif de génération d'image et afficheur comprenant un tel système - Google Patents
Système et procédé de commande pour dispositif de génération d'images à balayage, dispositif de génération d'image et afficheur comprenant un tel système Download PDFInfo
- Publication number
- WO2015004339A1 WO2015004339A1 PCT/FR2014/000155 FR2014000155W WO2015004339A1 WO 2015004339 A1 WO2015004339 A1 WO 2015004339A1 FR 2014000155 W FR2014000155 W FR 2014000155W WO 2015004339 A1 WO2015004339 A1 WO 2015004339A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- signals
- generating
- initial
- scanning
- Prior art date
Links
Classifications
-
- 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
-
- 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
- G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
- G09G3/025—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen with scanning or deflecting the beams in two directions or dimensions
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
-
- 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]
- H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
- H04N9/3135—Driving therefor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
-
- 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
Definitions
- Control system and method for a scanning image generation device, an image generating device and a display comprising such a system
- the invention relates to a system and a control method for a scanning image generating device.
- the invention also relates to an image generation device and a display, in particular a head-up display, intended to equip a motor vehicle, comprising such a control system.
- Such a head-up system comprises in known manner an image generation device, also called an imager, which produces an image on a real medium, and an optical system responsible for creating an image on a virtual medium outside the vehicle in the field of vision of the driver, from the image created on the real support.
- the scanning image generation device generally comprises a laser source, a horizontal and vertical scanning actuator, a laser beam deflection mirror controlled by the actuator, and a semitransparent screen on which the image is formed. real.
- a control system makes it possible, from any video source, to modulate the laser beams in real time and to synchronously drive the horizontal and vertical sweeps of the deflection mirror actuator to obtain an image of the resolution and the desired dimension.
- the optical system comprises the windshield of the equipped vehicle rather than a semi-reflective blade, which is particularly the case of high-end vehicles so that all components of the display remain hidden
- the defect is accentuated because of the asymmetry originating from the off-axis position of the projection system, the latter being in the axis of the driver, which itself is off-axis with respect to the axis of symmetry of the windscreen.
- Figure 1 describes a head-up display, comprising an image generation device 1 and a control system 3 of said image generation device.
- Said image generation device 1 comprises a light source 1 1, generating a light beam, a scanning generator 2 and a projection screen surface 13.
- Said scanning generator enables said beam to scan said surface 13 so as to form the images projected by said display.
- Said control system 3 controls said scanning generator 2.
- the image to be projected 101 corresponds to a video signal, called initial signal.
- said control device first estimates the number and the position of the pixels to be added to said image 101, as a function of the geometric distortion of the image to be corrected. It then calculates a video signal image 104 in which said pixels have been added to form a corrected image 104.
- Said video signal is sent to the image generating device which conventionally allows the image 105 to be formed on the surface 13.
- the invention relates to a control system for a device for generating scanning images, in particular for a display, in particular a head-up display, intended to form, from a light beam, an image to be transmitted by a optical system, said control system comprising a scanning signal generating unit for causing a deviation of said beam so as to form said so-called output image of said image generating device.
- said control system is configured so that said scanning signals comprise a correction component enabling said output image of said device to generating images to present a reverse deformation to that produced by said optical system.
- a control system thus makes it possible to generate corrected signals, based on initial scanning signals, which compensate for the geometrical deformations of the image introduced by the optical system to which the scanning image generation device is intended. to be connected.
- the corrected signals cause deformation of the image produced by the scanning image generation device so that this image, once transmitted and deformed by the optical system, returns to an undeformed appearance.
- This deformation compensation is performed without resorting to calculating an intermediate image enriched in pixels, which preserves the computer and electrical resources of the system. It is also performed without additional optical means.
- the system is configured to cause, for example, a variation of a sweep rate to accelerate or slow down the deflection of the beam at the locations necessary to achieve said reverse deformation.
- said scanning signal generating unit comprises a scanning signal generation module, called initial signals, and a module for correcting said initial signals into signals, called corrected signals, adapted to causing a deviation of said light beam to form said output image of said image generating device.
- the corrected signals are determined from the initial signals and predetermined correction functions.
- the predetermined correction functions are independent of the content of the image and provide corrected signals only from the initial scanning signals and predetermined parameters. No knowledge of the image is necessary.
- the functions depend solely on the optical system to which the scanning image generation device controlled by the control system according to the invention is connected. In other words, it is necessary to set the correction functions taking into account the use that is made of the control system according to the invention. For each optical system to which the control system of the scanning image generation device is to be connected, a parameterization of the correction functions must be performed.
- these functions are predetermined by reversing by formal calculation the distortions of the image introduced by the optical system to which the scanning image generation device controlled by the control system according to the invention is intended to be connected.
- the predetermined correction functions are functions of approximation of the optical laws of distortion of an image by the optical system to which said device for generating scanning images is intended to be connected.
- correction functions can be implemented by digital means or by analog means or by a combination of digital and analog means.
- the initial signal generation module comprises:
- a module for generating an initial vertical scanning signal a module for generating an initial vertical scanning signal.
- the initial signals are thus obtained from a video source and a module for extracting synchronization signals and vertical and horizontal signal generation modules.
- the scanning image generating device forms the image by a horizontal scanning and a vertical scanning, these scans being synchronized by the synchronization signals provided by the synchronization signal extraction module. .
- the scanning signal correction module comprises a module for generating a modulation, in particular amplitude, of the initial horizontal scanning signal, a function of a vertical position in said image, synchronized by said vertical synchronization signal for provide a corrected horizontal scan signal.
- the vertical correction function provides a vertical position which depends on the horizontal and vertical position of the image before compensation and its own correction parameters.
- Said control system advantageously comprises a parameterizable nonvolatile memory in which the correction functions are stored, in particular in the form of tables or parametric formulas.
- said device comprises a scanning generator enabling said beam to scan a projection screen surface of said device, said control system driving said scanning generator,
- said device comprises a light source generating said beam, in particular of the laser type,
- said light source is controlled by said control system.
- the invention also relates to a display, in particular a head-up display comprising an image generation device as described above.
- Said display comprises the optical system introducing the geometric deformations of the image compensated by the control system.
- the invention makes it possible to have a solution according to which a non-image is available. deformed, without having to directly project the beam from the source on the windshield.
- a method according to the invention thus makes it possible to correct control signals intended for a device for generating scanning images so that the image produced by this scanning image generation device presents an inverse deformation to the deformation produced by the optical system to which the scanning image generation device is to be connected.
- the resulting image at the output of the optical system no longer presents any optical deformation, the deformation generated by the optical system correcting the inverse deformation produced by the method according to the invention.
- said step of generating scanning signals comprises a step of generating scanning signals, called initial signals, and a step of correcting said initial signals into signals, called corrected signals, adapted to causing a deviation of said light beam to form the output image of said image generating device.
- said corrected signals are determined from said initial signals and predetermined correction functions.
- said predetermined correction functions are functions of approximation of the optical laws of distortion of an image by said optical system.
- the step of generating initial scanning signals comprises:
- the step of correcting said initial signals in said corrected signals comprises a step of generating a modulation, in particular amplitude, of the horizontal scanning signal, a function of a vertical position in said image, synchronized by said signal vertical synchronization circuit for providing said corrected horizontal scanning signal.
- the step of correcting said initial signals in said corrected signals comprises a step of generating a modulation, in particular amplitude of the vertical scanning signal, which is a function of a horizontal position in said image, synchronized by said synchronization signal. horizontal, to provide said corrected vertical scanning signal.
- said method comprises a step of storing said correction functions in a parameterizable non-volatile memory.
- FIG. 1 is a schematic view of a head-up display and a control system according to the state of the art
- FIG. 2 is a schematic view of a head-up display and a control system according to an embodiment of the invention
- FIG. 3 is a functional block view of an exemplary embodiment of the control system according to FIG.
- the invention as illustrated in Figure 2, the invention relates to a display, including head-up display, particularly for automobiles.
- said display comprises an image generation device 1, intended to form, from a light beam, an image 105 to be transmitted by an optical system, to form an image 106.
- Said optical system here comprises a windshield 22 of the vehicle, said image 106 formed by the display being positioned beyond the windshield.
- Said display further comprises a control system 3 of said image generation device.
- Said image generation device 1 comprises a light source 1 1, generating said light beam, a scanning generator 2 and a projection screen surface 13.
- Said scanning generator enables said beam to scan said surface 3 so as to form the images projected by said display.
- Said control system 3 controls said scanning generator 2.
- the image to be projected 101 corresponds to a video signal, called initial signal.
- said image generation device 1 here comprises a light source 1 1 generating said beam. It is advantageously a source of the laser type.
- Said source 11 may comprise a plurality of laser diodes, in particular three, said source being configured to form the light beam, intended to be deflected by the scanning generator 2, by juxtaposing beams individually emitted by each of said diodes.
- Said diodes emit a different color each, for example, a red, a green or a blue (RGB).
- Said light source 1 1 is advantageously controlled by said control system 3 which determines the light power emitted by each diode. In this way, it is possible to determine the luminous intensity and / or the color of each pixel of the image.
- the purpose of said scanning generator 2 is to move the light beam horizontally and vertically in order to scan at a predetermined frequency of the surface 13 to form the image 105.
- Said scanning generator comprises, for example, a scanning mirror 14 controlled by an actuator 12 which receives the control signals supplied by the control system 3 according to the invention.
- This mirror is for example a mirror with micro-electro-mechanical system (also known as "MEMS mirror") on which the light beam is reflected in a scanning beam.
- MEMS mirror micro-electro-mechanical system
- Such a mirror is able to rotate about two axes of rotation to perform a scan, the actuator driving the control signal for each of the axes.
- the MEMS mirror can be replaced by two flat and movable mirrors, whose movements are associated. One of these mirrors can be dedicated to a scan along a horizontal axis while the other mirror can be dedicated to a scan along a vertical axis.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Geometry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Instrument Panels (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14745180.1A EP3020036A1 (fr) | 2013-07-12 | 2014-06-30 | Système et procédé de commande pour dispositif de génération d'images à balayage, dispositif de génération d'image et afficheur comprenant un tel système |
US14/904,192 US20160156889A1 (en) | 2013-07-12 | 2014-06-30 | Control system and method for a device for generating scanned images, image generating device and display including such a system |
CN201480048250.0A CN106415696A (zh) | 2013-07-12 | 2014-06-30 | 产生扫描影像的装置的控制系统和方法、影像产生装置和带该系统的显示器 |
JP2016524856A JP2016532145A (ja) | 2013-07-12 | 2014-06-30 | スキャン画像を生成するための装置の制御システムおよび方法、画像生成装置およびこのようなシステムを含むディスプレイ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1301659 | 2013-07-12 | ||
FR1301659A FR3011116B1 (fr) | 2013-07-12 | 2013-07-12 | Systeme et procede de commande pour dispositif de generation d'images a balayage, dispositif de generation d'images et afficheur comprenant un tel systeme |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015004339A1 true WO2015004339A1 (fr) | 2015-01-15 |
Family
ID=49054616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2014/000155 WO2015004339A1 (fr) | 2013-07-12 | 2014-06-30 | Système et procédé de commande pour dispositif de génération d'images à balayage, dispositif de génération d'image et afficheur comprenant un tel système |
Country Status (6)
Country | Link |
---|---|
US (1) | US20160156889A1 (fr) |
EP (1) | EP3020036A1 (fr) |
JP (1) | JP2016532145A (fr) |
CN (1) | CN106415696A (fr) |
FR (1) | FR3011116B1 (fr) |
WO (1) | WO2015004339A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113746999B (zh) * | 2020-05-15 | 2023-01-03 | 华为技术有限公司 | 成像方法、成像装置、光学成像系统及车辆 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723805A (en) * | 1971-05-12 | 1973-03-27 | Us Navy | Distortion correction system |
US5302964A (en) * | 1992-09-25 | 1994-04-12 | Hughes Aircraft Company | Heads-up display (HUD) incorporating cathode-ray tube image generator with digital look-up table for distortion correction |
US6590606B1 (en) * | 1997-08-27 | 2003-07-08 | Ldt Gmbh & Co. Laser-Display-Technology Kg | Method for the compensating of geometric images and an arrangement for carrying out the method |
US20080239252A1 (en) * | 2007-03-29 | 2008-10-02 | Konica Minolta Opto, Inc. | Image projector |
KR20110016631A (ko) * | 2009-08-12 | 2011-02-18 | 엘지전자 주식회사 | 레이저 프로젝션 디스플레이 및 그의 영상 왜곡 보정 방법 |
US20110164294A1 (en) * | 2008-09-26 | 2011-07-07 | Konica Minolta Opto, Inc. | Image display device, head-mounted display and head-up display |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6850211B2 (en) * | 2001-11-08 | 2005-02-01 | James Deppe | Method for aligning a lens train assembly within a head-up display unit |
DE102007007162A1 (de) * | 2007-02-09 | 2008-08-14 | GM Global Technology Operations, Inc., Detroit | Hologaphisches Informations-Display |
JP2010243809A (ja) * | 2009-04-07 | 2010-10-28 | Seiko Epson Corp | 画像表示装置 |
US9217862B2 (en) * | 2010-06-08 | 2015-12-22 | Prysm, Inc. | Local dimming on light-emitting screens for improved image uniformity in scanning beam display systems |
-
2013
- 2013-07-12 FR FR1301659A patent/FR3011116B1/fr active Active
-
2014
- 2014-06-30 WO PCT/FR2014/000155 patent/WO2015004339A1/fr active Application Filing
- 2014-06-30 US US14/904,192 patent/US20160156889A1/en not_active Abandoned
- 2014-06-30 EP EP14745180.1A patent/EP3020036A1/fr not_active Withdrawn
- 2014-06-30 JP JP2016524856A patent/JP2016532145A/ja active Pending
- 2014-06-30 CN CN201480048250.0A patent/CN106415696A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723805A (en) * | 1971-05-12 | 1973-03-27 | Us Navy | Distortion correction system |
US5302964A (en) * | 1992-09-25 | 1994-04-12 | Hughes Aircraft Company | Heads-up display (HUD) incorporating cathode-ray tube image generator with digital look-up table for distortion correction |
US6590606B1 (en) * | 1997-08-27 | 2003-07-08 | Ldt Gmbh & Co. Laser-Display-Technology Kg | Method for the compensating of geometric images and an arrangement for carrying out the method |
US20080239252A1 (en) * | 2007-03-29 | 2008-10-02 | Konica Minolta Opto, Inc. | Image projector |
US20110164294A1 (en) * | 2008-09-26 | 2011-07-07 | Konica Minolta Opto, Inc. | Image display device, head-mounted display and head-up display |
KR20110016631A (ko) * | 2009-08-12 | 2011-02-18 | 엘지전자 주식회사 | 레이저 프로젝션 디스플레이 및 그의 영상 왜곡 보정 방법 |
Also Published As
Publication number | Publication date |
---|---|
CN106415696A (zh) | 2017-02-15 |
EP3020036A1 (fr) | 2016-05-18 |
JP2016532145A (ja) | 2016-10-13 |
US20160156889A1 (en) | 2016-06-02 |
FR3011116B1 (fr) | 2016-12-23 |
FR3011116A1 (fr) | 2015-03-27 |
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