EP2130385A1 - Universal test system for controlling a plurality of parameters concerning the operation of a device for presenting optoelectronic information of various types - Google Patents

Universal test system for controlling a plurality of parameters concerning the operation of a device for presenting optoelectronic information of various types

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Publication number
EP2130385A1
EP2130385A1 EP08787832A EP08787832A EP2130385A1 EP 2130385 A1 EP2130385 A1 EP 2130385A1 EP 08787832 A EP08787832 A EP 08787832A EP 08787832 A EP08787832 A EP 08787832A EP 2130385 A1 EP2130385 A1 EP 2130385A1
Authority
EP
European Patent Office
Prior art keywords
processor
test
camera
information
presentation
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.)
Ceased
Application number
EP08787832A
Other languages
German (de)
French (fr)
Inventor
Aurélie GERMAIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spherea Test and Services SAS
Original Assignee
Spherea Test and Services SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Spherea Test and Services SAS filed Critical Spherea Test and Services SAS
Publication of EP2130385A1 publication Critical patent/EP2130385A1/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • G09G2320/0693—Calibration of display systems

Definitions

  • the present invention relates to a universal test system capable of controlling a plurality of parameters relating to the operation of optoelectronic information presentation display devices of various types. It is equally applicable to screen displays, for example cathode ray tube (CRT), liquid crystal display (LCD), or even plasma, to devices in which the image is projected to infinity such as for example, Head Up Display (HUD), windshield projection displays, or even Helmet Mounted Display (HMD).
  • CTR cathode ray tube
  • LCD liquid crystal display
  • plasma to devices in which the image is projected to infinity
  • HUD Head Up Display
  • windshield projection displays or even Helmet Mounted Display (HMD).
  • HMD Helmet Mounted Display
  • the object of the invention is more particularly to allow a characterization of these information presentation devices, by means of a single easy-to-use sensor that makes it possible, in automatic mode, to carry out all the necessary measurements and tests.
  • this characterization namely in particular, but not exclusively:
  • this over-equipment generates additional costs, in particular for the maintenance of test facilities and the management of obsolescence.
  • these test means frequently involve several sensors each assigned to a type of measurement performed.
  • the sensor used will be a luminance meter; a colorimetric measurement will involve a colorimeter; for precision measurements, use a high resolution small field sensor; for standard geometric measurements, the sensor used will be a medium-resolution large-field sensor; some measures such as those relating to the detection of defective pixels or the analysis of basic patterns are usually done in manual mode.
  • the document WO 02/39 753 describes, for its part, a device for the test of liquid crystal display devices which uses light source means illuminating the display laterally and a camera arranged to receive, via a polarizer and a filter, a fraction of the light reflected by the display.
  • a processor analyzes the image received by the camera to verify a number of criteria. This device is therefore used specifically for liquid crystal displays and is not suitable for other types of displays.
  • the object of the invention is therefore more particularly to eliminate these drawbacks by using a single sensor that automatically or semi automatically performs all of the usual measurements and tests on most display devices or viewers on the market. , in a way to :
  • test system involving as a single universal sensor, a conventional type digital camera controllable remotely from a computer system comprising a processor and a human / machine interface such as a keyboard / screen assembly, this camera having a possibly variable focus lens whose development can be done automatically through a telemetric device (for example of the "autofocus" type), said processor being itself coupled, thanks to remote transmission means, to the presentation device to be tested, means being provided for arranging the camera with respect to the presentation device that one wishes to test, preferably coaxially with it.
  • a telemetric device for example of the "autofocus" type
  • the processor is then programmed to perform a sequence comprising the following operating phases:
  • a self-positioning phase comprising the control by the processor of the display or projection by the positioning marker presentation device, the analysis of the image obtained by the camera and the control by the processor of the positioning means according to the results of said analysis,
  • a possible calibration phase to bring about, for example by adjusting the focal length of the objective, the image generated by the presentation device to occupy a predetermined area of the digital photograph taken by the camera (for example, the whole Photo),
  • test phase during which the processor executes at least one test sequence comprising the application by the processor to the display system, stimuli that may consist of information to be displayed and / or commands intended to modify parameters of operation of the display and then, following the application of stimuli, the taking of a digital photograph by the camera and the analysis of the photograph thus taken so as to determine at least one parameter of operation of the presentation device, this test sequence being repeated, with appropriate stimuli for each of the parameters of the presentation device that is to be verified.
  • the processor will be programmed to execute test sequences appropriate to all types of presentation device that is to be tested.
  • the system may comprise means for identifying the type of apparatus to be tested and means for determining, following this identification, the corresponding test sequence to be executed.
  • the single figure is a schematic representation of a test system mounted on a bench.
  • test system consists of a bench 1 carrying two support structures 2, 3, namely:
  • a support structure 2 of a camera 4 with the possibility of adjustment in position, along the longitudinal axis X, X 'of the bench and along an axis Y, Y' perpendicular to the plane of this bench, a support structure 3 of a presentation device 5 (shown schematically by a parallelepiped block), with possibility of adjustment in orientation around a vertical axis V, V (perpendicular to the plane of the bench 1) and a horizontal axis H , H '(parallel to said bank 1).
  • the support structure 2 comprises a base 6 of C-shaped section lying whose core is fixed on the bench 1 and which supports a carriage 7 movable along longitudinal rails 8, 9 constituted by cylindrical rods horizontal members fixed by their ends on the parallel flanges of the base 6.
  • the actuation of the carriage 7 along the slides 8, 9 is provided by a screw actuator rotated by an electric motor housed in the carriage 7.
  • the trolley 7 supports a bracket 10 carrying vertical slides 11, 12 along which the camera 4 can slide, thanks to a connecting piece (not shown) provided at the rear of the camera.
  • the movements of the camera 4 along the slides 11, 12 are provided by a screw actuator driven by a motor 13 integral with the bracket 10.
  • the support structure 3 consists of a support piece 14 of U-shaped section whose core is rotatably mounted on the bench 1 about the vertical axis V, V via a base 15 housing a motor for rotating the workpiece 14.
  • the presentation device 5 is mounted in a support and fixing frame 16 rotatably mounted between the wings of the support piece 14, around the horizontal axis, by means of two coaxial journals 17, 18 passing through corresponding orifices of the two wings.
  • the rotational drive of the presentation device 5 is then provided by means of a geared motor 19 in engagement with the pin 18.
  • the digital camera 4 is a digital camera with the usual functions of a professional type device. It has a lens with variable focus (optical zoom / electronic zoom) and the focus can be achieved automatically through a telemetry system (autofocus).
  • This digital camera 4 is connected for example via a USB connection to a processor 20 provided with software designed to provide the controls of the camera 4, or manually, via a human / machine interface 21 (here a keyboard / screen console), or automatically, according to a predetermined operating sequence.
  • a processor 20 provided with software designed to provide the controls of the camera 4, or manually, via a human / machine interface 21 (here a keyboard / screen console), or automatically, according to a predetermined operating sequence.
  • the presentation device 5 is connected to the processor, which is further programmed to execute a test sequence comprising the application to the stimulus presentation device which may consist of information to be displayed and / or commands to modify operating parameters of this device.
  • the processor 20 is further programmed to control the motors of the actuators of the two support structures via appropriate links to allow an operator to make all the settings from the keyboard console. /screen.
  • the adjustment of the position of the display device can be carried out automatically in self-positioning mode for example by displaying (or projecting) positioning marks (grid or chart) on the device for presentation and analysis of the image supplied by the device, then appropriate control of the actuators by the processor 20.
  • the processor 20 controls the focusing of the camera 4.
  • a first step it adjusts the focal length of the camera 4 so that the image made by the display 5 occupies a predetermined area of the picture taken by the camera 4 (preferably the whole picture). He then proceeds to the development (thanks to his telemetering device) so as to obtain a photo as clear as possible.
  • the processor 20 performs one or more test sequences each comprising the application to the stimulus presentation device which can for example lead to the display by the device of information such as grids or patterns and / or commands to modify the operating parameters of this device (such as luminance, chrominance, contrast, smoothing, line thickness ).
  • the processor 20 controls one or more shots and the transfer of digital data relating to photographs taken in his own memories. He then performs an image analysis of these photographs in order to perform the characterization of the presentation device.
  • This characterization could possibly be associated with an autotune and autotune process of the presentation device 5.
  • the invention can be used both as part of a quality control at the end of the production line, for example in order to detect and possibly eliminate defective devices, as part of a maintenance. .
  • the system according to the invention may be installed on site, for example in the cockpit of an aircraft to test the devices. of display and visualization of this site.
  • the system according to the invention may be installed on site, for example in the cockpit of an aircraft to test the devices. of display and visualization of this site.
  • the fixity of the display devices only means for positioning or autopositioning of the camera mounted on the structure of the cockpit must be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Studio Devices (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Selective Calling Equipment (AREA)

Abstract

According to the invention, the test system uses a digital photography device (4) that can be remotely controlled from a computer system including a processor (20) coupled to a man/machine interface (21) and to the presentation device to be tested by a remote transmission means. A means is further provided for centring the photographic apparatus (4) opposite the presentation device (5) to be tested. The processor (20) is programmed so as to carry out a self-positioning phase of the photographic apparatus, an automatic focalisation phase of the lens, and a test phase of the information presentation device.

Description

SYSTEME DE TEST UNIVERSEL APTE A CONTROLER UNE PLURALITE DE PARAMETRES RELATIFS AU UNIVERSAL TEST SYSTEM FOR CONTROLLING A PLURALITY OF PARAMETERS RELATING TO
FONCTIONNEMENT DE DISPOSITIF DE PRESENTATION D'INFORMATIONS OPTOELECTRONIQUES DE TYPES VARIES.OPERATION OF DEVICE FOR PRESENTATION OF OPTOELECTRONIC INFORMATION OF VARIOUS TYPES.
La présente invention concerne un système de test universel apte à contrôler une pluralité de paramètres relatifs au fonctionnement de dispositifs d'affichage de présentation d'informations optoélectroniques de types variés. Elle s'applique aussi bien à des afficheurs à écrans, par exemple à tube cathodique (CRT), à cristaux liquides (LCD), ou même à plasma qu'à des dispositif dans lesquels l'image est projetée à l'infini tels que, par exemple, des viseurs tête haute (Head Up Display - HUD), des systèmes d'affichage par projection sur le pare-brise, ou même des viseurs de casque (Helmet Mounted Display - HMD).The present invention relates to a universal test system capable of controlling a plurality of parameters relating to the operation of optoelectronic information presentation display devices of various types. It is equally applicable to screen displays, for example cathode ray tube (CRT), liquid crystal display (LCD), or even plasma, to devices in which the image is projected to infinity such as for example, Head Up Display (HUD), windshield projection displays, or even Helmet Mounted Display (HMD).
L'invention a plus particulièrement pour but de permettre une caractérisation de ces dispositifs de présentation d'informations, au moyen d'un capteur unique facile à utiliser et permettant d'effectuer, en mode automatique, l'ensemble des mesures et des tests nécessaires à cette caractérisation, à savoir notamment, mais non limitativement :The object of the invention is more particularly to allow a characterization of these information presentation devices, by means of a single easy-to-use sensor that makes it possible, in automatic mode, to carry out all the necessary measurements and tests. to this characterization, namely in particular, but not exclusively:
- des tests de colorimétrie (aussi bien en un point que dans tout le champ de l'afficheur),- colorimetric tests (both at one point and in the entire display field),
- des tests d'uniformité des couleurs (histogramme de couleurs ...),- color uniformity tests (color histogram ...),
- des mesures de luminance, qui peuvent être également réalisées dans tout le champ de l'afficheur, des tests d'uniformité pouvant en outre être réalisés dans tous les points du champ, - la détection de pixels défectueux (un ou plusieurs pixels, "clusters" ...),- luminance measurements, which can also be carried out in the entire field of the display, uniformity tests can be carried out in all points of the field, the detection of defective pixels (one or more pixels, "clusters" ...),
- des mesures géométriques (largeur de trace, parallaxe, distorsion ...),geometric measurements (trace width, parallax, distortion, etc.),
- la détection d'incrustation de motifs élémentaires dans une image ...the detection of incrustation of elementary patterns in an image ...
On sait que dans l'état actuel de la technique, à chaque type d'équipement servant à la présentation d'informations sont associés des moyens de test spécifiques, ce qui est particulièrement "onéreux" si l'on doit acquérir des équipements faisant intervenir des dispositifs d'affichage ou de visualisation de types différents.It is known that, in the current state of the art, each type of equipment used for the presentation of information is associated with specific test means, which is particularly "expensive" if one must acquire equipment involving display or display devices of different types.
Par ailleurs, ce suréquipement engendre des coûts supplémentaires notamment pour la maintenance des moyens de tests et la gestion de l'obsolescence. En outre, ces moyens de test font fréquemment intervenir plusieurs capteurs affectés, chacun, à un type de mesure effectuée.Moreover, this over-equipment generates additional costs, in particular for the maintenance of test facilities and the management of obsolescence. In addition, these test means frequently involve several sensors each assigned to a type of measurement performed.
Ainsi, pour une mesure de luminance, le capteur utilisé sera un luminancemètre ; une mesure de colorimétrie fera intervenir un colorimètre ; pour des mesures de précision, on utilisera un capteur petit champ à haute résolution ; pour des mesures géométriques standard, le capteur utilisé sera un capteur grand champ à moyenne résolution ; certaines mesures telles que celles ayant trait à la détection de pixels défectueux ou à l'analyse de motifs élémentaires sont habituellement faites en mode manuel.Thus, for a luminance measurement, the sensor used will be a luminance meter; a colorimetric measurement will involve a colorimeter; for precision measurements, use a high resolution small field sensor; for standard geometric measurements, the sensor used will be a medium-resolution large-field sensor; some measures such as those relating to the detection of defective pixels or the analysis of basic patterns are usually done in manual mode.
Ces inconvénient se retrouvent dans le dispositif d'inspection décrit dans le brevet US 6 064 462 qui exploite la corrélation entre les anneaux de Newton formés à la surface d'un panneau d'affichage à cristal liquide et l'espace entre les deux plaques de verre contenant le cristal liquide, en vue de vérifier l'uniformité dudit espace : Ce principe n'est pas envisageable dans un dispositif de visualisation n'utilisant pas un afficheur à cristaux liquides. De même, le brevet japonais JP 31 603 10 utilise un montage mettant en œuvre plusieurs dispositifs photographiques destinés à prendre des photos d'une mire présentée sur l'écran cathodique d'un dispositif de présentation d'informations. Ce montage est spécifiquement conçu pour un type particulier d'écran cathodique et ne convient pas pour d'autres types d'affichage tels que, par exemple, des viseurs tête haute ou des viseurs de casque.These drawbacks are found in the inspection device described in US Pat. No. 6,064,462 which exploits the correlation between the Newton rings formed on the surface of a liquid crystal display panel and the space between the two plates of glass containing the liquid crystal, to verify the uniformity of said space: This principle is not possible in a display device not using a liquid crystal display. Likewise, Japanese Patent JP 31 603 10 uses an arrangement employing a plurality of photographic devices for taking pictures of a pattern presented on the CRT of an information display device. This mount is specifically designed for a particular type of CRT and is not suitable for other types of displays such as, for example, head-up displays or helmet sights.
Le document WO 02/39 753 décrit, quant à lui, un dispositif pour le test de dispositifs d'affichage à cristaux liquides qui utilise des moyens sources lumineuses éclairant latéralement l'afficheur ainsi qu'un appareil photographique disposé de manière à recevoir, via un polariseur et un filtre, une fraction de la lumière réfléchie par l'afficheur. Un processeur analyse l'image reçue par l'appareil photographique en vue de vérifier un certain nombre de critères. Ce dispositif s'utilise donc spécifiquement pour des afficheurs à cristaux liquides et ne convient pas pour les autres types d'afficheurs.The document WO 02/39 753 describes, for its part, a device for the test of liquid crystal display devices which uses light source means illuminating the display laterally and a camera arranged to receive, via a polarizer and a filter, a fraction of the light reflected by the display. A processor analyzes the image received by the camera to verify a number of criteria. This device is therefore used specifically for liquid crystal displays and is not suitable for other types of displays.
L'invention a donc plus particulièrement pour but de supprimer ces inconvénients en utilisant un capteur unique permettant d'effectuer automatiquement ou semi automatiquement l'ensemble des mesures et des tests usuels, sur la plupart des dispositifs d'affichage ou viseurs existant sur le marché, de manière à :The object of the invention is therefore more particularly to eliminate these drawbacks by using a single sensor that automatically or semi automatically performs all of the usual measurements and tests on most display devices or viewers on the market. , in a way to :
- homogénéiser les moyens de tests utilisés dans des entreprises utilisant différents types de moyens d'affichage ou de visualisation,homogenize the test means used in companies using different types of display or visualization means,
- uniformiser les procédures de tests et les résultats obtenus (du fait que l'on utilise un capteur unique),- standardize the test procedures and the results obtained (because a single sensor is used),
- diminuer les coûts d'investissement et les coûts d'entretien grâce à l'utilisation de moyens d'acquisition unique,- reduce investment costs and maintenance costs through the use of single acquisition means,
- diminuer la subjectivité des résultats obtenus grâce au remplacement des mesures manuelles par des mesures automatiques, - A -- reduce the subjectivity of the results obtained by replacing manual measurements with automatic measurements, - AT -
- pouvoir stocker les informations relatives à un test de manière à pouvoir notamment les comparer à des informations obtenues lors de tests effectués ultérieurement.- Being able to store the information relating to a test so as to be able to compare them with information obtained in subsequent tests.
A cet effet, elle propose un système de test faisant intervenir en tant que capteur unique universel, un appareil de photo numérique de type classique commandable à distance à partir d'un système informatique comportant un processeur et une interface homme/machine telle qu'un ensemble clavier/écran, cet appareil photographique comportant un objectif éventuellement à focale variable dont la mise au point peut s'effectuer automatiquement grâce à un dispositif télémétrique (par exemple de type "autofocus"), ledit processeur étant lui-même couplé, grâce à des moyens de transmission à distance, au dispositif de présentation à tester, des moyens étant prévus pour disposer l'appareil photographique en regard du dispositif de présentation que l'on souhaite tester, de préférence coaxialement à celui-ci.For this purpose, it proposes a test system involving as a single universal sensor, a conventional type digital camera controllable remotely from a computer system comprising a processor and a human / machine interface such as a keyboard / screen assembly, this camera having a possibly variable focus lens whose development can be done automatically through a telemetric device (for example of the "autofocus" type), said processor being itself coupled, thanks to remote transmission means, to the presentation device to be tested, means being provided for arranging the camera with respect to the presentation device that one wishes to test, preferably coaxially with it.
Le processeur est alors programmé de manière à effectuer une séquence comprenant les phases opératoires suivantes :The processor is then programmed to perform a sequence comprising the following operating phases:
- une phase d'autopositionnement comportant la commande par le processeur de l'affichage ou de la projection par le dispositif de présentation de repères de positionnement, l'analyse de l'image obtenue par l'appareil photographique et la commande par le processeur des moyens de positionnement en fonction des résultats de ladite analyse,a self-positioning phase comprising the control by the processor of the display or projection by the positioning marker presentation device, the analysis of the image obtained by the camera and the control by the processor of the positioning means according to the results of said analysis,
- une phase de calibration éventuelle pour amener, par exemple en réglant la focale de l'objectif, l'image générée par le dispositif de présentation à occuper une zone prédéterminée de la photographie numérique prise par l'appareil de photo (par exemple toute la photo),a possible calibration phase to bring about, for example by adjusting the focal length of the objective, the image generated by the presentation device to occupy a predetermined area of the digital photograph taken by the camera (for example, the whole Photo),
- une phase de mise au point automatique de l'objectif de manière à obtenir une image nette, - une phase de test au cours de laquelle le processeur exécute au moins une séquence de tests comportant l'application par le processeur au système d'affichage, de stimuli pouvant consister en des informations à afficher et/ou en des commandes visant à modifier des paramètres de fonctionnement de l'afficheur puis, à la suite de l'application de stimuli, la prise d'une photographie numérique par l'appareil de photo et l'analyse de la photographie ainsi prise de manière à déterminer au moins un paramètre de fonctionnement du dispositif de présentation, cette séquence de test étant répétée, avec des stimuli appropriés pour chacun des paramètres du dispositif de présentation que l'on veut vérifier.- an autofocus phase of the lens so as to obtain a clear image, a test phase during which the processor executes at least one test sequence comprising the application by the processor to the display system, stimuli that may consist of information to be displayed and / or commands intended to modify parameters of operation of the display and then, following the application of stimuli, the taking of a digital photograph by the camera and the analysis of the photograph thus taken so as to determine at least one parameter of operation of the presentation device, this test sequence being repeated, with appropriate stimuli for each of the parameters of the presentation device that is to be verified.
Bien entendu, le processeur sera programmé de manière à pouvoir exécuter des séquences de test appropriées à tous les types de dispositif de présentation que l'on veut tester. Dans ce cas, le système pourra comprendre des moyens d'identification du type d'appareil à tester et des moyens permettant de déterminer, à la suite de cette identification, la séquence de test correspondante à exécuter.Of course, the processor will be programmed to execute test sequences appropriate to all types of presentation device that is to be tested. In this case, the system may comprise means for identifying the type of apparatus to be tested and means for determining, following this identification, the corresponding test sequence to be executed.
Un mode d'exécution de l'invention sera décrit ci-après, à titre d'exemple non limitatif, avec référence au dessin annexé dans lequel :One embodiment of the invention will be described below, by way of non-limiting example, with reference to the accompanying drawing in which:
La figure unique est une représentation schématique d'un système de test monté sur un banc.The single figure is a schematic representation of a test system mounted on a bench.
Dans l'exemple illustré sur cette figure, le système de test se compose d'un banc 1 portant deux structures de support 2, 3, à savoir :In the example illustrated in this figure, the test system consists of a bench 1 carrying two support structures 2, 3, namely:
- une structure de support 2 d'un appareil de photo 4 avec possibilité de réglage en position, selon l'axe longitudinal X, X' du banc et selon un axe Y, Y' perpendiculaire au plan de ce banc, - une structure de support 3 d'un dispositif de présentation 5 (représentée schématiquement par un bloc parallélépipédique), avec possibilité de réglage en orientation autour d'un axe vertical V, V (perpendiculaire au plan du banc 1) et un axe horizontal H, H' (parallèle audit banc 1).a support structure 2 of a camera 4 with the possibility of adjustment in position, along the longitudinal axis X, X 'of the bench and along an axis Y, Y' perpendicular to the plane of this bench, a support structure 3 of a presentation device 5 (shown schematically by a parallelepiped block), with possibility of adjustment in orientation around a vertical axis V, V (perpendicular to the plane of the bench 1) and a horizontal axis H , H '(parallel to said bank 1).
Dans cet exemple, la structure de support 2 comprend une embase 6 de section en forme de C couché dont l'âme est fixée sur le banc 1 et qui supporte un chariot 7 mobile le long de glissières longitudinales 8, 9 constituées par des tiges cylindriques horizontales fixées par leurs extrémités sur les ailes parallèles de l'embase 6. L'actionnement du chariot 7 le long des glissières 8, 9 est assuré grâce à un actionneur à vis entraîné en rotation par un moteur électrique logé dans le chariot 7. Le chariot 7 supporte une potence 10 portant des glissières verticales 11, 12 le long desquelles l'appareil de photo 4 peut coulisser, grâce à une pièce de liaison (non représentée) prévue à l'arrière de l'appareil de photo. Les déplacements de l'appareil de photo 4 le long des glissières 11, 12 sont assurés par un actionneur à vis entraîné par un moteur 13 solidaire de la potence 10.In this example, the support structure 2 comprises a base 6 of C-shaped section lying whose core is fixed on the bench 1 and which supports a carriage 7 movable along longitudinal rails 8, 9 constituted by cylindrical rods horizontal members fixed by their ends on the parallel flanges of the base 6. The actuation of the carriage 7 along the slides 8, 9 is provided by a screw actuator rotated by an electric motor housed in the carriage 7. The trolley 7 supports a bracket 10 carrying vertical slides 11, 12 along which the camera 4 can slide, thanks to a connecting piece (not shown) provided at the rear of the camera. The movements of the camera 4 along the slides 11, 12 are provided by a screw actuator driven by a motor 13 integral with the bracket 10.
La structure de support 3 se compose d'une pièce de support 14 de section en forme de U dont l'âme est montée rotative sur le banc 1 autour de l'axe vertical V, V par l'intermédiaire d'une embase 15 logeant un moteur d'entraînement en rotation de la pièce 14.The support structure 3 consists of a support piece 14 of U-shaped section whose core is rotatably mounted on the bench 1 about the vertical axis V, V via a base 15 housing a motor for rotating the workpiece 14.
Le dispositif de présentation 5 est monté dans un cadre de support et de fixation 16 monté rotatif entre les ailes de la pièce de support 14, autour de l'axe horizontal, grâce à deux tourillons coaxiaux 17, 18 passant dans des orifices correspondants des deux ailes. L'entraînement en rotation du dispositif de présentation 5 est alors assuré au moyen d'un motoréducteur 19 en prise avec le tourillon 18. L'appareil de photo numérique 4 est un appareil numérique comportant les fonctions usuelles d'un appareil de type professionnel. Il présente un objectif à focale variable (zoom optique/zoom électronique) et dont la mise au point peut s'effectuer automatiquement grâce à un système télémétrique (autofocus).The presentation device 5 is mounted in a support and fixing frame 16 rotatably mounted between the wings of the support piece 14, around the horizontal axis, by means of two coaxial journals 17, 18 passing through corresponding orifices of the two wings. The rotational drive of the presentation device 5 is then provided by means of a geared motor 19 in engagement with the pin 18. The digital camera 4 is a digital camera with the usual functions of a professional type device. It has a lens with variable focus (optical zoom / electronic zoom) and the focus can be achieved automatically through a telemetry system (autofocus).
Cet appareil de photo numérique 4 est relié par exemple par l'intermédiaire d'une connexion USB à un processeur 20 muni d'un logiciel conçu de manière à assurer les commandes de l'appareil de photo 4, soit manuellement, par l'intermédiaire d'une interface homme/machine 21 (ici une console clavier/écran), soit automatiquement, selon une séquence opératoire prédéterminée.This digital camera 4 is connected for example via a USB connection to a processor 20 provided with software designed to provide the controls of the camera 4, or manually, via a human / machine interface 21 (here a keyboard / screen console), or automatically, according to a predetermined operating sequence.
De même, le dispositif de présentation 5 est connecté au processeur, lequel est en outre programmé pour exécuter une séquence de test comprenant l'application au dispositif de présentation de stimuli pouvant consister en des informations à afficher et/ou des commandes visant à modifier des paramètres de fonctionnement de ce dispositif.Similarly, the presentation device 5 is connected to the processor, which is further programmed to execute a test sequence comprising the application to the stimulus presentation device which may consist of information to be displayed and / or commands to modify operating parameters of this device.
Le processeur 20 est en outre programmé de manière à assurer la commande des moteurs des actionneurs des deux structures de support par l'intermédiaire de liaisons appropriées et ce, afin de permettre à un opérateur d'effectuer tous les réglages à partir de la console clavier/écran. Le réglage de la position du dispositif de visualisation (coaxialité de l'axe optique du dispositif et celui de l'objectif de l'appareil de photo ou perpendicularité du plan de l'afficheur par rapport à l'axe optique de l'appareil de photo) peut s'effectuer automatiquement en mode autopositionnement par exemple par affichage (ou projection) de repères de positionnement (grille ou mire) sur le dispositif de présentation et analyse de l'image fournie par l'appareil, puis commande appropriée des actionneurs par le processeur 20. Une fois que le dispositif de présentation 5 a été correctement positionné en regard de l'appareil de photo 4, le processeur 20 commande la mise au point de l'appareil 4.The processor 20 is further programmed to control the motors of the actuators of the two support structures via appropriate links to allow an operator to make all the settings from the keyboard console. /screen. The adjustment of the position of the display device (coaxiality of the optical axis of the device and that of the lens of the camera or perpendicularity of the plane of the display relative to the optical axis of the camera of photo) can be carried out automatically in self-positioning mode for example by displaying (or projecting) positioning marks (grid or chart) on the device for presentation and analysis of the image supplied by the device, then appropriate control of the actuators by the processor 20. Once the presentation device 5 has been correctly positioned next to the camera 4, the processor 20 controls the focusing of the camera 4.
Dans un premier temps, il règle la focale de l'appareil 4 de manière à ce que l'image réalisée par l'afficheur 5 occupe une zone prédéterminée de la photo réalisée par l'appareil 4 (de préférence toute la photo). Il procède alors à la mise au point (grâce à son dispositif de télémesure) de manière à obtenir une photo aussi nette que possible.In a first step, it adjusts the focal length of the camera 4 so that the image made by the display 5 occupies a predetermined area of the picture taken by the camera 4 (preferably the whole picture). He then proceeds to the development (thanks to his telemetering device) so as to obtain a photo as clear as possible.
Le processeur 20 effectue une ou plusieurs séquences de tests comportant chacune l'application au dispositif de présentation de stimuli pouvant par exemple conduire à l'affichage par le dispositif d'informations telles que des grilles ou des mires et/ou des commandes visant à modifier les paramètres de fonctionnement de ce dispositif (tels que la luminance, la chrominance, le contraste, le lissage, l'épaisseur des traits ...). Le processeur 20 commande alors une ou plusieurs prises de vue puis le transfert des données numériques relatives aux photographies venant d'être prises dans ses propres mémoires. Il effectue alors une analyse d'image de ces photographies en vue d'effectuer la caractérisation du dispositif de présentation.The processor 20 performs one or more test sequences each comprising the application to the stimulus presentation device which can for example lead to the display by the device of information such as grids or patterns and / or commands to modify the operating parameters of this device (such as luminance, chrominance, contrast, smoothing, line thickness ...). The processor 20 then controls one or more shots and the transfer of digital data relating to photographs taken in his own memories. He then performs an image analysis of these photographs in order to perform the characterization of the presentation device.
Cette caractérisation pourra être éventuellement associée à un processus d'autoréglage et d'autocalibrage du dispositif de présentation 5.This characterization could possibly be associated with an autotune and autotune process of the presentation device 5.
Bien entendu, l'invention pourra être utilisée aussi bien dans le cadre d'un contrôle qualité en fin de chaîne de production par exemple en vue de détecter et, éventuellement, d'éliminer des dispositifs défectueux, que dans le cadre d'une maintenance.Of course, the invention can be used both as part of a quality control at the end of the production line, for example in order to detect and possibly eliminate defective devices, as part of a maintenance. .
Dans ce dernier cas, le système selon l'invention pourra être installé sur site, par exemple dans le poste de pilotage d'un avion pour tester les dispositifs d'affichage et de visualisation de ce site. Dans ce cas, compte tenu de la fixité des dispositifs d'affichage, seuls des moyens de positionnement ou d'autopositionnement de l'appareil photographique montés sur la structure du poste de pilotage, devront être prévus.In the latter case, the system according to the invention may be installed on site, for example in the cockpit of an aircraft to test the devices. of display and visualization of this site. In this case, given the fixity of the display devices, only means for positioning or autopositioning of the camera mounted on the structure of the cockpit must be provided.
Grâce aux dispositions précédemment décrites, le système selon l'invention permet d'obtenir de nombreux avantages tels que notamment :Thanks to the arrangements previously described, the system according to the invention makes it possible to obtain numerous advantages such as, in particular:
- une optimisation des temps de tests,- an optimization of the test times,
- une automatisation partielle, voire même totale, des tests,- a partial and even total automation of the tests,
- une meilleure objectivité des résultats (l'analyse étant effectuée d'une façon purement numérique, on s'affranchit de toute appréciation subjective),- a better objectivity of the results (the analysis being carried out in a purely numerical way, one is freed from all subjective appreciation),
- une possibilité de mémorisation des résultats, notamment en vue d'analyses statistiques,- a possibility of memorizing the results, especially for statistical analysis,
- une plus grande exhaustivité des tests,- a greater exhaustiveness of the tests,
- une très grande souplesse d'utilisation et de multiples possibilités d'adaptation, notamment aux nouveaux types de dispositifs de présentation d'informations. - a great flexibility of use and multiple possibilities of adaptation, in particular with the new types of devices of presentation of information.

Claims

Revendications claims
1. Système de test apte à effectuer le contrôle d'une pluralité de paramètres relatifs au fonctionnement de dispositifs de présentation d'informations optoélectroniques de types variés, ce système faisant intervenir des moyens de prise de vue montés sur des moyens de positionnement permettant de centrer les moyens de prise de vue en regard de chaque dispositif de présentation, caractérisé en ce qu'il fait intervenir, en tant que moyens de prise de vue, un appareil de photographie numérique (4) unique de type classique comprenant un objectif à focale variable, cet appareil photographique étant commandable à distance à partir d'un système informatique comportant un processeur (20) et une interface homme/machine (21), cet appareil comportant un objectif dont la mise au point peut s'effectuer automatiquement grâce à un dispositif télémétrique, en ce que ledit processeur (20) est par ailleurs couplé, grâce à des moyens de transmission à distance, au dispositif de présentation à tester (5), et en ce que le processeur (20) est programmé de manière à effectuer au moins une séquence comprenant les phases opératoires suivantes :1. A test system capable of controlling a plurality of parameters relating to the operation of optoelectronic information presentation devices of various types, this system involving shooting means mounted on positioning means for centering the shooting means facing each presentation device, characterized in that it involves, as shooting means, a single digital photography apparatus (4) of conventional type comprising a lens with variable focal length , said camera being remotely controllable from a computer system comprising a processor (20) and a man / machine interface (21), said apparatus comprising a lens whose development can be carried out automatically by means of a device telemeter, in that said processor (20) is furthermore coupled, by means of remote transmission means, to the presentation to be tested (5), and in that the processor (20) is programmed to perform at least one sequence comprising the following operating phases:
- une phase d'autopositionnement comportant la commande par le processeur (20) de l'affichage ou de la projection par le dispositif de présentation (5) de repères de positionnement, l'analyse de l'image obtenue par l'appareil photographique et la commande par le processeur (20) des moyens de positionnement en fonction des résultats de ladite analyse,a self-positioning phase comprising the control by the processor (20) of the display or projection by the positioning marker display device (5), the analysis of the image obtained by the camera and the control by the processor (20) of the positioning means according to the results of said analysis,
- une phase de calibration comprenant un réglage de la focale de l'objectif de manière à ce que l'image réalisée par l'afficheur (5) occupe une zone prédéterminée des photos réalisées par l'appareil de photo,a calibration phase comprising an adjustment of the focal length of the objective so that the image produced by the display (5) occupies a predetermined zone of the photos taken by the camera,
- une phase de mise au point automatique de l'objectif de manière à obtenir des photographies possédant une bonne netteté, des informations présentées par le dispositif de présentation (5), - une phase de test au cours de laquelle le processeur (20) exécute au moins une séquence de test comportant notamment un test de colorimétrie, un test d'uniformité des couleurs, un test de mesure de luminance, un test de détection de pixels défectueux et/ou un test d'incrustation de motifs élémentaires dans l'image, lesdits tests comportant chacun l'application par le processeur (20) au dispositif de présentation (5) de stimuli pouvant consister en des informations à afficher et/ou en des commandes visant à modifier des paramètres de fonctionnement dudit dispositif (5) puis, à la suite de l'application desdits stimuli, la prise d'une photographie numérique par l'appareil de photographie (4) puis l'analyse de la photographie par le processeur (20) de manière à déterminer et à vérifier au moins un paramètre de fonctionnement du dispositif de présentation, cette séquence de test étant répétée, avec des stimuli appropriés pour chacun des paramètres du dispositif de présentation que l'on veut vérifier,a phase of automatic focusing of the objective so as to obtain photographs having a good sharpness, information presented by the presentation device (5), a test phase during which the processor (20) executes at least one test sequence comprising in particular a colorimetric test, a color uniformity test, a luminance measurement test, a defective pixel detection test; and / or an incrementation test of elementary patterns in the image, said tests each comprising the application by the processor (20) to the stimulus presentation device (5) which may consist of information to be displayed and / or commands for modifying operating parameters of said device (5) and then, following the application of said stimuli, taking a digital photograph by the camera (4) and then analyzing the photograph by the processor (20) so as to determine and verify at least one operating parameter of the presentation device, this test sequence being repeated, with appropriate stimuli for each of the parameters of the device. f presentation that we want to check,
- la caractérisation du dispositif de présentation à partir de l'analyse des paramètres des photographies ainsi obtenues.the characterization of the presentation device based on the analysis of the parameters of the photographs thus obtained.
2. Système selon la revendication 1, caractérisé en ce que dans le cas où le dispositif (5) à tester est un dispositif de présentation d'informations dans lequel les informations sont affichées sur un écran, la phase de mise au point automatique s'effectue au moyen d'un dispositif télémétrique équipant l'appareil de photo (4).2. System according to claim 1, characterized in that in the case where the device (5) to be tested is an information presentation device in which the information is displayed on a screen, the autofocus phase s' performed by means of a telemetric device equipping the camera (4).
3. Système selon la revendication 1, caractérisé en ce que dans le cas où le dispositif à tester est un viseur dans lequel l'image contenant les susdites informations est projetée à l'infini, la phase de mise au point comprend le réglage à l'infini de l'objectif. 3. System according to claim 1, characterized in that in the case where the device to be tested is a viewfinder in which the image containing the aforesaid information is projected to infinity, the focusing phase comprises the adjustment to the infinity of purpose.
4. Système selon l'une des revendications précédentes, caractérisé en ce qu'il comprend des moyens d'identification du type de dispositif (5) à tester et des moyens de détermination, à la suite de cette identification de la séquence de test correspondante à exécuter.4. System according to one of the preceding claims, characterized in that it comprises means for identifying the type of device (5) to be tested and determining means, following this identification of the corresponding test sequence. to execute.
5. Système selon l'une des revendications précédentes, caractérisé en ce que l'appareil de photo (4) est monté sur une structure de support mobile selon deux axes perpendiculaires (X, X' - Y, Y'), les déplacements dudit appareil le long desdits axes étant commandés par deux actionneurs respectifs pilotés par le processeur (20).5. System according to one of the preceding claims, characterized in that the camera (4) is mounted on a movable support structure along two perpendicular axes (X, X '- Y, Y'), displacements of said apparatus along said axes being controlled by two respective actuators driven by the processor (20).
6. Système selon l'une des revendications précédentes, caractérisé en ce que le dispositif de présentation d'informations à tester (5) est monté sur une structure de support orientable autour de deux axes de rotation perpendiculaires (H, H' - V, V), l'orientation du dispositif de présentation (5) étant assurée par deux actionneurs respectifs commandés par le processeur (20). 6. System according to one of the preceding claims, characterized in that the information display device to be tested (5) is mounted on a support structure orientable about two perpendicular axes of rotation (H, H '- V, V), the orientation of the presentation device (5) being provided by two respective actuators controlled by the processor (20).
EP08787832A 2007-03-22 2008-03-21 Universal test system for controlling a plurality of parameters concerning the operation of a device for presenting optoelectronic information of various types Ceased EP2130385A1 (en)

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FR0702084A FR2914099B1 (en) 2007-03-22 2007-03-22 UNIVERSAL TEST SYSTEM FOR CONTROLLING A PLURALITY OF PARAMETERS RELATING TO THE OPERATION OF DEVICES FOR PRESENTATION OF OPTOELECTRONIC INFORMATION OF VARIOUS TYPES
PCT/FR2008/000385 WO2008135664A1 (en) 2007-03-22 2008-03-21 Universal test system for controlling a plurality of parameters concerning the operation of a device for presenting optoelectronic information of various types

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IL201041A0 (en) 2010-05-17
CA2681052A1 (en) 2008-11-13
JP2010522347A (en) 2010-07-01
CN101682798A (en) 2010-03-24
WO2008135664A1 (en) 2008-11-13
RU2009138941A (en) 2011-04-27
UA95673C2 (en) 2011-08-25
US8339464B2 (en) 2012-12-25
FR2914099A1 (en) 2008-09-26
US20100214418A1 (en) 2010-08-26
FR2914099B1 (en) 2013-04-05

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