EP2580667A2 - Procédé et dispositif pour identifier une représentation erronée de données d'image sur une unité d'affichage - Google Patents

Procédé et dispositif pour identifier une représentation erronée de données d'image sur une unité d'affichage

Info

Publication number
EP2580667A2
EP2580667A2 EP11733601.6A EP11733601A EP2580667A2 EP 2580667 A2 EP2580667 A2 EP 2580667A2 EP 11733601 A EP11733601 A EP 11733601A EP 2580667 A2 EP2580667 A2 EP 2580667A2
Authority
EP
European Patent Office
Prior art keywords
display unit
image
data
test data
image data
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.)
Withdrawn
Application number
EP11733601.6A
Other languages
German (de)
English (en)
Inventor
Uwe Eckelmann-Wendt
Bernhard Evers
Ralf Pinger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2580667A2 publication Critical patent/EP2580667A2/fr
Withdrawn legal-status Critical Current

Links

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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • 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
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • a faulty display of image data on a display unit ie for example a screen, a monitor or a display
  • One way to achieve this is to have redundant information in the image data to be displayed. This can be done for example in such a way that in the case of a display unit used in a railway engineering interlocking takes place, the visualization of a traveling road on the one hand by a reproduced green color on the track section and on the other hand by a next-standing, also shown in green Far ⁇ be image of a signal. Only if both Similarly, if information is present in the image displayed on the display unit, the operator can assume that the representation of the image on the display unit is correct.
  • the procedure described has the disadvantage that at least the safety-critical information in the form of corresponding image data to be displayed must be generated redundantly. Furthermore, can not be completely excluded concluded that an erroneous representation by the respective operator depending on the particular situation, if not, or only with a time delay deferrers ⁇ is detected. Furthermore, it should be noted that, for example display units in the form of customary today Liquid crystal displays (LCD, Liquid Crystal Display) are ver ⁇ tively complex structure and, for example, its own memory and its own computer unit have to have be ⁇ relationship wise. As a result, for example, there is the danger that under certain circumstances an old image of the memory can be displayed which, although taken in its own right, does not reflect the actual state of the monitored system.
  • LCD Liquid Crystal Display
  • the present invention has for its object to provide a method that allows a particularly reliable and at the same time timely detection of a faulty display of image data on a display unit.
  • This object is achieved by a method for detecting a faulty display of image data on a display unit, wherein by electronic detection ⁇ at least a portion of the image displayed on the display test data are detected and based on an electronic evaluation of at least part of the acquired test data a faulty representation of the image data on the display ⁇ unit is detected.
  • the display unit is understood to be that component which serves for the actual reproduction of the image data, ie the planar component from which a person can read or view the image represented on the basis of the image data.
  • the image data to be displayed can be received here, for example, by a graphics card or a graphics controller or another control unit.
  • the component from which the Ad ⁇ geiki receives the to be displayed image data may be formed together with the display unit or to a common component as separate, merely communicatively connected to the display unit component.
  • the image data are those informa- NEN, the part of the display unit, the input signal rela ⁇ hung as the basis for the image bil ⁇ representation.
  • the image data are preferably a set of individual, preferably digital, data values that respectively indicate image values for individual pixels, ie pixels, of the image to be displayed.
  • At least a portion of the image displayed on the display unit at ⁇ are first recorded test data by electronic detection.
  • This loading indicates that an automated detection or is performed to read back ⁇ the basis of the image data on the image displayed the display unit.
  • He ⁇ grasp the entire image displayed on the display unit carried.
  • a faulty representation of the image data on the display unit is then detected by means of an electronic evaluation of at least part of the acquired test data.
  • the inventive method has the particular advantage that it is an automatic, independent of operating or monitoring personnel review of the representation of
  • Image data on the display unit allows. In this case, so that generated at any point in this way error can before ⁇ geous enough, the entire path of the transmission of the image to be displayed data to the display unit to eigentli ⁇ chen representation on the display unit to be checked, reliable and due to the electronic detection and evaluation also promptly can be recognized.
  • the method according to the invention can be further developed in such a way that the test data are recorded by means of an electronic camera oriented on the display unit.
  • This offers the advantage that it is by means of an out on the display unit ⁇ oriented electronic camera in which Erfas ⁇ sen of the test data to a particularly simple and comparatively inexpensive feasible method for recording the test data is.
  • the camera can preferably be attached to the display unit itself.
  • the test data are recorded by means of photosensors arranged on the display unit. This means that the photosensors are arranged on the display unit itself, whereby a direct and distortion-free detection of the test data is made possible.
  • ⁇ advance reduction is that the photo sensors are arranged on the on ⁇ display unit that the picture displayed on the display unit is further recognizable.
  • the inventive method may in this case be wei ⁇ terhin designed such that the test data are recorded by means of a mounted on the display unit light-transmissive photosensitive film.
  • This is advantageous because detection of the test data for any display units is possible by means of a corresponding sensor film, without requiring an adaptation of the display units themselves.
  • the photosensors of the photosensitive film may advantageously be independent of the size and number of pixels, ie the resolution, of the monitor. Due to the fact that a corresponding light-transmissive photo ⁇ sensitive film may be directly placed on the display unit ⁇ introduced, no focusing is advantageously required.
  • the inventive method is designed such that the test data are recorded by integrated in the display unit Fo ⁇ tosensoren spatially neighboring for detecting the light from at least one of each photo-sensor th pixels of the display unit are formed. That is, according to this embodiment, the photosensors are arranged in spaces of the pixels of the display unit. In this case, the photosensors are preferably designed such that they are darkened toward the outside, ie towards the front of the display unit, and essentially exclusively detect the light of the at least one pixel spatially adjacent to the respective photosensor. This ensures insensitivity of the method to stray light.
  • the image can be acquired or recorded by acquiring the test data with a resolution corresponding to the resolution of the display unit or else with a lower resolution.
  • the advantage is achieved that further comprises a relatively flat structure of the Ad ⁇ geaji is made possible and, moreover, in particular egg ⁇ ne impairment of the quality of the Representation of the image data on the display unit by the recording technique, ie the photo sensors, is avoided. It is an optical Fo kusstechnik not he ⁇ conducive advantageously in this case.
  • test data can be recorded on the one hand by means of an electronic camera aligned with the display unit and, on the other hand, on the other hand, the test data also to be recorded by means of photosensors integrated in the display unit.
  • the quality or the speed of the electronic rating can be increased in particular by a corresponding redundant detection of the test data.
  • the method according to the invention is configured such that the electronic evaluation of the at least one part of the acquired test data comprises a comparison of the at least one part of the acquired test data with at least one part of the image data.
  • the recorded test data or at least a part thereof can thus be compared with the respective image data.
  • the hardware components used for the display of the image data and the acquisition of the test data are independent of one another in that the data used for the comparison with the image data can be given exclusively by the electronically recorded test data. If, in the comparison, which can in different ways it ⁇ follow and include, for example, a processing of the image data and / or the test data, a match is found, the display of image data on the display unit is error free; on the other hand, in the case of a deviation from a faulty representation of the image data on the display unit is assumed.
  • the interpretation Bezie ⁇ hung as interpretation of the deviation depending on the type and purpose of illustrating the image data on the display unit may be different.
  • the inventive method can also be designed in such a way, additionally or alternatively, that the electronic evaluation of the at least one part of the sensing ⁇ th test data comprises a comparison of the at least one part of the detected test data with the respective image data associated with the reference data.
  • the electronic evaluation of the at least one part of the sensing ⁇ th test data comprises a comparison of the at least one part of the detected test data with the respective image data associated with the reference data.
  • the electronic evaluation of the at least one part of the acquired test data comprises a content-related interpretation of the test data.
  • a content-related interpretation of the test data in the context of the electronic evaluation of the test data, as an alternative or in addition to a comparison between desired and actual, it is also possible to interpret the content of the image read back, ie the test data.
  • OCR Optical Character Recognition
  • an interpretation of the test data corresponding content examples play, by means of automatic character recognition, be made. In this case, it is thus less aimed at the representation of the image data itself, but at the information reproduced by means of the representation.
  • the method according to the invention is configured such that the detection of the test data and the electronic evaluation of the at least one part of the recorded test data is carried out continuously or at regular time intervals. This is advantageous, since in this way a faulty representation of the image data on the display unit can be detected particularly promptly.
  • image data to be displayed are transmitted in the form of a test pattern to the display unit.
  • test patterns facilitates electronic evaluation of at least one part of the errez- th test data, since in this case the expected sketchda ⁇ th are known.
  • the use of a test pattern can also be used to test those functions of the display unit which may not be used at the given time, but may be required in possibly future situations. This can relate, for example, to the display of specific colors or the activation of specific areas of the display unit.
  • corresponding test patterns can re ⁇ transmitted regularly for very short times and advertising displayed to, the duration of the display may be below the perceptual ability of the human eye, preferably, so that a viewer of the display unit by the transmission of the test pattern is not or only disturbed insignificantly ,
  • the erforder ⁇ clear representation of time of the test pattern can be reduced, for example, to periods of time of less than 0.1 seconds.
  • the object of the present invention is to specify a device which enables a particularly reliable and at the same time timely recognition of a faulty display of image data on a display unit.
  • a Einrich ⁇ processing for detecting an incorrect display of image data on a display unit, the device having the display unit for displaying an image, first means for acquiring test data by electronic detecting at least a portion of the displayed on the display unit Image and second means for detecting a faulty representation of the image data on the display unit based on an electronic evaluation of at least part of the acquired test data.
  • the device according to the invention is designed such that the first means comprise an electronic camera aligned with the display unit.
  • the first means comprise photosensors arranged on the display unit.
  • the device and the art ⁇ invention may be pronounced that the first means comprise a mounted on the display unit at ⁇ transparent photosensitive Fo ⁇ lie.
  • the inventive device is designed such that the first means comprise integrated Fo ⁇ tosensoren in the display unit, the minimum for detecting the light of to-one are formed adjacent to the respective photo-sensor spatial pixel of the display unit.
  • inventive device for carrying out the method of the invention or for carrying out the procedural ⁇ Rens formed in accordance with one of the aforementioned preferred embodiments of the inventive method.
  • Figure 1 is a schematic representation of a first
  • Figure 2 is a schematic representation of a second
  • Figure 3 is a schematic representation of a third
  • Embodiment of the device according to the invention and Figure 4 in a schematic representation for explaining an embodiment of the inventive method ⁇ on a display unit ⁇ displayed image.
  • Figure 1 shows a schematic representation of a first
  • Embodiment of the device according to the invention Shown is a display unit 10, which may be a screen, a monitor or a display. Furthermore, a control unit 20 is provided, which can be designed, for example, as a graphics card, graphic controller or other control computer. Displayed image data B are transmitted from the control unit 20 to the display unit 10, which displays or reproduces an image on the basis of the received image data B.
  • the device furthermore has first means for acquiring test data P in the form of a camera 30. As indicated in FIG. 1, the camera 30 is aligned with the display unit 10 in this case.
  • test data P relating to the entire image displayed on the display unit 10 is detected by means of the camera 30.
  • the acquired test data P are transmitted from the camera 30 to the control unit 20 and subjected there to an electronic evaluation.
  • the electronic evaluation of the acquired test data P takes place exclusively with respect to the test data P recorded for the parts 40, 50 of the image.
  • the test data would already be related from the outset to capture part of the picture. This could be done, for example, by simply aligning the camera 30 with a part of the display unit 10 or of the image displayed thereon.
  • the device shown in FIG. 1 as well as the method described in this context have the particular advantage that the flat image displayed on the display unit 10 is essentially detected on the basis of the test data P, as it is also seen by an operator. This means that especially those display errors that arise on the way to the display unit 10 or in the Ad ⁇ geillon 10 itself can be detected.
  • the check is advantageously carried out independently of an operator of the display unit 10, the complete path being from the output of the image data B to be displayed, ie from the transmission of the image data B from the control unit 20 to the display unit 10, until the actual display on the display unit 10 the exam is included.
  • the test can be carried out continuously or cyclically, ie regularly recurring.
  • the monitoring of the representation of the image data in the context of the method advantageously relates to the target image content, ie not exclusively to the check as to whether the display image unit 10 is in principle capable of displaying image data.
  • a comprehensive functional test of the representation of the image data on the display unit 10 can be carried out by possibly only very briefly taking into play test samples. This offers the advantage that error sources, in particular also within the display unit 10 itself, can be detected or disclosed in a timely manner.
  • FIG. 1 A certain disadvantage of the embodiment of the device according to the invention shown in FIG. 1 can be seen in the fact that the field of view on the display unit 10 in front of the camera 30 for a correct and reliable function of the
  • Procedure should be free at all times. To this end, flattest possible viewing angle of the camera 30 on the display unit to ⁇ 10 is desirable. However, this can lead to a distorted image in the geometry, so that, if necessary, an equalization of the image, recorded in the form of the test data, of the image displayed on the display unit 10 by means of subsequent image processing may become necessary.
  • the camera 30 should preferably have a resolution that still allows an image interpretation after the image equalization.
  • reflections on the display unit 10 may under certain circumstances also include image recognition, i. capturing the
  • Figure 2 shows a schematic representation of a second embodiment of the device according to the invention. In contrast to Figure 1, only a portion rela ⁇ hung as section of a display unit 10 is shown here.
  • the detection of the test data by means of first means which comprise arranged on the display unit 10 photo sensors. It would be conceivable game at ⁇ that photo sensors are provided on or in a arranged in front of the display unit 10 glass.
  • the first means comprise an attached on the display unit 10 ⁇ transparent photosensitive film 60th
  • the light-transmitting film 60 has sectionsenso- ren 61, 62, 63 and 64, which are arranged such that for example, the photo sensor 61 of pixels or image points 71 to 79 of the display unit surrounded 10 is rela ⁇ hung example adjacent to these.
  • the photosensitive film or layer 60 covers part of the displayed on the display unit 10 of the Bil ⁇ , so that are usually a darkening of the image content.
  • the photocells of the photosensitive film 60 are facing the display unit 10 and therefore much less sensitive to stray light of the environment than for the light of the display unit 10, ie for the light emitted by the pixels.
  • the photo sensors 61 detect to 64 are each a group of pixels regulatingswei ⁇ se pixels of the display unit 10, so that the detection of the check data by the photosensors 61 to 64 with a lower accuracy or resolution than the egg ⁇ gentliche Image output of the display unit 10 takes place.
  • the resolution of the captured image, ie the acquired test data should, if possible, be at least sufficient for a rating of approximately 10 mm 2 image content (ie, information as "point").
  • text recognition by means of, for example, OCR is still possible, at least for fonts of correspondingly large size.
  • shields 81, 82 the rule in the intermediate spaces between the photo-sensors 61 and 63 and the pixels 77 and 78 or 78 and 79 are vorgese ⁇ hen.
  • the planar application of the translucent film 60 avoids distortions during image acquisition, whereby focusing for acquiring the test data is not necessary.
  • FIG. 3 shows a schematic representation of a third embodiment of the device according to the invention.
  • the representation of Figure 3 is substantially that of Figure 2 corresponds to give 2 the first means comprise basic difference to the embodiment of the figure in the on ⁇ display unit 10 integrated photosensors that spatially adjacent for detecting the light from at least one of each photo-sensor Pixels of the display unit 10 are formed.
  • photo sensors 61a to 64a are designated by way of example, which are arranged in the spaces between the pixels or pixels 71 to 79 and are integrated in the display unit 10 itself. This offers the advantage that a darkening of the displayed image is reduced or completely avoided.
  • the image data is displayed and the read or read back of the displayed image in the form of the test data advantageously takes place by means of two independent electronic processing units. This ensures that errors in the image representation do not also affect image acquisition, as would be the case, for example, in case the same processing unit is used for image output and image acquisition. Preferably, therefore, the image acquisition - with the exception of the integrated photo sensors - realized independently of the image output.
  • the photosensors 61a to 64a are such that they are darkened to the outside and capture only the light of the surrounding pixels.
  • the display unit 10 according to the exemplary embodiment of FIG. 3 can be constructed similarly to the display known from the published application US 2006/0007222 A1.
  • the familiar display has the fundamental difference that the photo-sensors are oriented toward the front of the display unit out to detect as a camera, for example, the image viewer ei ⁇ nes of the relevant display unit.
  • the constitutional He ⁇ the test data can be performed with a similar resolution as the resolution of the display unit or with a lower resolution.
  • the display unit according to the principal structure is flat and the quality of the presentation is not hindered by the technical components required to capture the test data.
  • the display unit advantageously no focusing or complex geometrical caliber ⁇ tion is necessary, since this is already fixed by the design or construction of the display unit itself.
  • Figure 4 shows an image displayed on a display unit image in a schematic view for explaining an embodiment of the procedural ⁇ proceedings of the invention. Specifically, an example of a representation of image data of an operational control display of an interlocking of the railway automation technology is shown here. Visible here are various tracks and switches and indicated signals.
  • an electronic evaluation of the at least one part of the acquired test data is necessary in order to detect a faulty representation of the image data on the display unit can.
  • a comparison of at least one part of the sensing ⁇ th test data with at least a portion of the image data is possible to interpret the content of the image read using the acquired test data.
  • test interval the determination of the test interval and the areas to inspect the display unit be ⁇ relationship example of the displayed image can be made dependent on the jeweili ⁇ gen application and the respective underlying risk ⁇ considerations.
  • the test interval will generally be based on the hazard caused by a possible misrepresentation. So it is conceivable example ⁇ that the goal is to avoid incorrect image data for a time period of more than 1 second. In this case, a standard test interval of 1 second with regard to the acquisition of the test data and the subsequent electronic evaluation could be used as a basis.
  • the region may of be to regulate- set the image area in dependence on the respective An ⁇ case of use respectively determined so that the image data displayed on the display unit may comprise a mixture of to be tested and not to be tested Informatio ⁇ NEN.
  • This advantageously avoids an excessive reaction of the system in the event that faults are detected in safety-critical uncritical areas of the display, ie the illustrated image data.
  • an interpretive interpretation of the content is provided ⁇ is possible advantageously.
  • this may include text recognition, for example in the form of OCR or even a general image recognition.
  • test patterns By using reference data or reference image patterns assigned to the respective image data, electronic evaluation of the test data is possible with little computational effort.
  • the examination of the display unit can be particularly comprehensive, fast and reliable with regard to its ability to image.
  • ⁇ at test patterns or test pattern image can be switched to the display unit so long that a Erfas- solution of the corresponding test data is made possible.
  • Such a use of test samples or test images is expedient, since a currently displayed image does not necessarily use the complete display options.
  • a displayed image may not include the color red. So if the display option respects ⁇ Lich the color red for a long time be unused and because ei ⁇ nes fault, the corresponding display option does not work be reliably, so a regular check is useful to eg provide, as required, a warning in red to be granted ⁇ and not only to recognize in a hazardous situation that a corresponding display is not possible due to a failure.
  • test data In the context of a method for detecting an incorrect display of image data on a display unit can be detected or, if the test data are recorded based on the entire displayed image, only for the relevant parts of the now only for the parts of the picture 90-118 strigda ⁇ th Figures 90 to 118 an electronic assessment of the recorded test data are made.
  • the check ⁇ the parts or regions of the image, ie, the test ⁇ ranges from 90 to 109 for roadways or 110-118 for signals are indicated in Figure 4 merely exemplary, so that in practice other and / or additional test areas can be defined.
  • control unit in the form of a control ⁇ computer
  • display unit which are shown in Figure 4, the control unit as the number of individual identifiable elements with their attributes, that is, for example, their color is known. Since the elements ⁇ se with a change of the display do not change their ⁇ positi on, but only their attributes in the context of the embodiment described an electronic Be ⁇ evaluation of the test data with respect to the respective color of the display is sufficient.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Studio Devices (AREA)
  • Image Input (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

L'invention concerne un procédé pour identifier une représentation erronée de données d'image (B) sur une unité d'affichage (10). Afin de permettre une identification rapide et particulièrement fiable d'une représentation erronée de données d'image (B) sur une unité d'affichage (10), le procédé selon l'invention consiste à transmettre les données d'image à afficher (B) à l'unité d'affichage (10), à détecter des données de contrôle (P) par détection électronique d'au moins une partie de l'image représentée sur l'unité d'affichage (10) et à identifier une représentation erronée des données d'image (B) sur l'unité d'affichage (10), sur la base d'une évaluation électronique d'au moins une partie des données de contrôle (P) détectées. L'invention concerne également un dispositif pour identifier une représentation erronée de données d'image (B) sur une unité d'affichage (10).
EP11733601.6A 2010-06-11 2011-06-06 Procédé et dispositif pour identifier une représentation erronée de données d'image sur une unité d'affichage Withdrawn EP2580667A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010023891A DE102010023891A1 (de) 2010-06-11 2010-06-11 Verfahren und Einrichtung zum Erkennen einer fehlerhaften Darstellung von Bilddaten auf einer Anzeigeeinheit
PCT/EP2011/059260 WO2011154343A2 (fr) 2010-06-11 2011-06-06 Procédé et dispositif pour identifier une représentation erronée de données d'image sur une unité d'affichage

Publications (1)

Publication Number Publication Date
EP2580667A2 true EP2580667A2 (fr) 2013-04-17

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EP11733601.6A Withdrawn EP2580667A2 (fr) 2010-06-11 2011-06-06 Procédé et dispositif pour identifier une représentation erronée de données d'image sur une unité d'affichage

Country Status (6)

Country Link
US (1) US20130076899A1 (fr)
EP (1) EP2580667A2 (fr)
CN (1) CN102934091B (fr)
DE (1) DE102010023891A1 (fr)
RU (1) RU2571411C2 (fr)
WO (1) WO2011154343A2 (fr)

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RU2571411C2 (ru) 2015-12-20
WO2011154343A3 (fr) 2012-02-16
RU2013101000A (ru) 2014-07-20
CN102934091A (zh) 2013-02-13
WO2011154343A2 (fr) 2011-12-15
CN102934091B (zh) 2015-12-16
DE102010023891A1 (de) 2011-12-15

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