EP2439722B1 - Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule - Google Patents

Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule Download PDF

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Publication number
EP2439722B1
EP2439722B1 EP10009934.0A EP10009934A EP2439722B1 EP 2439722 B1 EP2439722 B1 EP 2439722B1 EP 10009934 A EP10009934 A EP 10009934A EP 2439722 B1 EP2439722 B1 EP 2439722B1
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EP
European Patent Office
Prior art keywords
data
safety
relevant
display data
pixel
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.)
Revoked
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EP10009934.0A
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German (de)
English (en)
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EP2439722A1 (fr
Inventor
David Manuel Gruenert
Stephan Haag
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Pixy AG
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Pixy AG
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Application filed by Pixy AG filed Critical Pixy AG
Priority to EP10009934.0A priority Critical patent/EP2439722B1/fr
Priority to BRPI1105104-3A priority patent/BRPI1105104A2/pt
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    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/02—Handling of images in compressed format, e.g. JPEG, MPEG
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2358/00—Arrangements for display data security
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/10—Automotive applications
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory

Definitions

  • the present invention relates to a method for checking pixel-formatted display data for display on a screen of a display device in the vehicle.
  • the cabs are increasingly equipped with display devices, which have screens that are equipped based on the LCD (Liquid Cristal Display) technology. Accordingly, safety-related basic data, such as the speed, the temperature, the pressure, the oil level or the state of the brake system must be displayed digitally on the screen of the display device in the cab.
  • LCD Liquid Cristal Display
  • the safety requirements for safety-relevant hardware and software are defined in rail traffic by the safety standards EN 50126, EN 50128 and EN 50129.
  • the representation of the speed, for example, on the screen of the display device is classified according to the intended safety standard as safety level SIL ("safety-integrity level") - 2, while the monitoring of the brake system must meet the safety level SIL-4.
  • the SIL-2 safety level means that the user of the display device must be informed in rail traffic as soon as the SIL-2 safety level is not met. However, the safety system itself does not have to be a measure to be hit. In the case of the safety requirement for safety level SIL-4, for example, the brake system as a safety system must react immediately.
  • the focus is placed on the security level SIL-2, so that safety-related basic data, such as the speed on the screen of the display device are displayed correctly.
  • the publication EP 2 273 369 A1 is referred to in Article 54 (3) and discloses a method of displaying security-related information on a display device, comprising the steps of: inputting at least one input to a computing unit; computationally processing the input variable in the computer unit into an image data sequence which maps the input variable; Forwarding the image data sequence to a display device and displaying the image data sequence on the display device; Supplying the image data sequence to a test unit; Performing a security check by computationally creating a check code for the image data sequence; Comparing the verification code with a plurality of existing comparison codes; Assigning the thus determined comparison code to a corresponding possible value of the input variable; and comparing it with the value of the input to produce either a positive or negative test result to cause a safety-related response.
  • the publication WO 2009/050106 A1 is regarded as the closest prior art and discloses a test device for checking the validity of display signals related to a given image, comprising means for obtaining image data from the display signals, means for determining a check value of the image data and a comparator unit for comparing the image data determined test value with an image-related, stored test value, wherein in the event that the two test values agree, a validity of the display signals is detected.
  • the publication DE 10 2005 011 942 discloses a method for error disclosure when applying a security-relevant display with a first, driven via a first data source display element and a second, driven via a second data source display element for displaying a detected measured value.
  • the first display element is concealed relative to the second display element, and in the absence of overlap of the two display elements, an error disclosure to the user.
  • the publication DE 10 2004 039 498 discloses a method for monitoring the state of an LCD display, in particular the frozen state of this display, wherein the attachment of a light sensor takes place in a small area in which the display control computer generates a specific, alternating bit pattern and the output signal of the light sensor to the input of a independent controller leads.
  • the controller receives the bit pattern data from the control computer and compares it with the bit pattern from the light sensor. If there is a mismatch between the bit pattern received from the control computer and the bit pattern from the light sensor, an alarm is triggered.
  • the present invention is therefore based on the object of providing a method for monitoring security-relevant pixel-formatted display data, which enables both rapid and reliable monitoring of the security-relevant display data and, in the event of an error or interruption, discloses this to a user.
  • the object is achieved by the method according to claim 1.
  • An inventive method is used to check pixel-formatted display data, which by means of a Calculator generated from security-related basic data and supplied to the display on a screen of a display device, in particular a LCD (Liquid Cristal Display) monitor in the cab of a vehicle, the screen.
  • the security-relevant pixel-formatted display data are tapped in front of the screen and converted in a monitor by means of a compressor into security-relevant compressed display data and fed to a verifier.
  • a reference data set with predefined, safety-relevant compressed reference display data is stored in a memory of the monitor.
  • the safety-related basic data in the supervisor determine which predefined safety-related compressed reference display data from the reference data record is supplied to the verifier.
  • the verifier compares the predefined safety-related compressed reference display data supplied with it and the safety-relevant compressed display data with one another and, if the verification fails, reveals this to a user by means of a first signal on the display device.
  • the advantage of such a method is the rapid evaluation of exclusively security-relevant pixel-formatted display data, since the compressor considerably reduces the data volume and the reviewer already has compressed reference display data available for the comparison.
  • Another advantage is the double protection of the security relevant basic data to be evaluated: On the one hand, the pixel formatted display data is generated by the computer and the supervisor is compressed and on the other hand, the current safety relevant basic data in a second path
  • the compressor reduces a color depth of the pixel-formatted display data, in particular from an 18-bit or 24-bit color level over an 8-bit gray level to a gray level of less than 8 bits per pixel.
  • This has the advantage that the pixel-formatted display data has a smaller data volume.
  • the review of the security-relevant pixel-formatted display data is accelerated and the necessary computing power is reduced.
  • the compressor further reduces a resolution of a multi-pixel subfield to a pixel, such that the pixel formatted display data is present as compressed display data.
  • This causes a further reduction of the data volume of the security-relevant pixel-formatted display data.
  • the advantage with this type of compression of the pixel-formatted display data is that the distance, also called Hamming distance, can be chosen between two security-relevant pixel-formatted display data in such a way that the probability of a false verification result is minimized or reduced below the permissible value.
  • the checker controls a signal lamp, in particular an LED, in particular, to form a second signal on the display device such that it is lit or flashing.
  • the reviewer switches on a backlight of the screen and, if there is no match, forms the first signal.
  • the safety-related basic data is supplied to a controller in the monitor in order to read the memory and to supply the corresponding predefined safety-related reference display data to the reviewer.
  • the memory is stored in a storage medium, in particular a flash.
  • a storage medium in particular a flash. This has the advantage that data can be stored directly in the monitor, which can be accessed very quickly or from which the data can be read quickly.
  • the basic data in addition to the security-relevant basic data, the basic data also has non-safety-relevant basic data, so that the computer generates pixel-formatted display data from the security-relevant and non-safety-relevant basic data. This causes that in a screen page selected by the user, both security-related and non-security-relevant display data of the selected screen page the
  • the tapped pixel-formatted display data is fed to a region filter and filtered out of these the non-safety-relevant pixel-formatted display data, so that the reviewer performs the check exclusively on the basis of the security-relevant pixel-formatted display data.
  • This has the effect that the non-safety-relevant display data has no relevance for checking the security-relevant display data and thus the reviewer has to evaluate a smaller volume of data.
  • the computer when generating the pixel-formatted display data, the computer integrates a screen control signal, such as a start-of-line signal, and a window filter filters out of the tapped pixel-formatted display data this screen control signal.
  • a screen control signal such as a start-of-line signal
  • a window filter filters out of the tapped pixel-formatted display data this screen control signal.
  • the pixel-formatted display data are converted by means of a data converter of serial LVDS data into parallel video data, in particular into an RGB color space with a color depth of 18 bits or 24 bits.
  • the LVDS data are so-called low voltage differential signals, which are currently suitable for LCD monitors as a data format to display pixel-formatted display data for display.
  • parallel video data such as RGB666 video data
  • RGB666 video data does not require conversion by the data converter.
  • RGB666 video signals can be fed directly to the window filter, compressor or regional filter.
  • additional hardware is saved, which leads accordingly to the cost reduction of the hardware.
  • An in Fig. 1 exemplified display device 10 which is intended for use in the cab of a vehicle, in particular a rail vehicle, provides basic data 12 in a form suitable for the particular application on a screen 14.
  • the screen 14 has controls 16, by means of which a user of the display device 10, depending on the situation in which the vehicle is located, can bring a selected screen page 18 on the screen 14 of the display device 10 for display. For example, in a railway station, the position of the doors can be selected as the screen page 18, while the speed of the vehicle can be displayed on another selected screen page 18 while driving.
  • signal lamps 19 mounted on the screen 14, in particular LEDs 20, 22, 24, 26, status information can be displayed to the user.
  • an optical marker 28 and the identification of a security-relevant region 13 and a non-safety-relevant region 15 are shown in the screen 14 in the screen page 18. The operation of these elements will be described in detail in connection with the description of Fig. 5 and Fig. 6 explained.
  • the basic data 12 which are to be displayed on the screen 14 are transmitted via a fieldbus system such as the CAN bus, the MVB (Multi-Vehicular Bus System). or transmitted via an Ethernet data line to a computer 30 in the display device 10.
  • the computer 30 visualizes the basic data 12 on the screen 14 by converting the basic data 12 into pixel-formatted display data 32 by means of software.
  • the software can be executed, for example, on an operating system in the computer 30, such as Linux.
  • safety-relevant basic data 34 such as, for example, the speed
  • basic safety data 36 such as the fill level of a water tank, for example.
  • the safety-related basic data 34 must meet the safety level SIL-2, as stated in the introduction. They must also be transmitted in accordance with safety level SIL-2.
  • the computer 30 itself does not meet the safety requirements of rail traffic, since the conversion of safety-related basic data 34 in pixel-formatted display data 32 only the security level SIL-0 (dotted areas shown in FIG Fig. 1 ) Fulfills. Thus, the pixel-formatted display data 32 must be tapped before delivery to the screen 14 of the display device 10 and in a monitor 38, the security level SIL-2 (unshaded areas shown in FIG Fig. 1 ), be tested.
  • the pixel-formatted display data 32 are converted into compressed display data 44 by means of a compression method 42. Only the security-relevant pixel-formatted display data 46 in FIG security-related compressed display data 48 converted.
  • the monitor 38 also has the same security-related basic data 34 as the computer 30.
  • a memory 50 of the monitor 38 stores a reference data record 52 with predefined, safety-relevant compressed reference display data 54.
  • the safety-relevant basic data 34 determine in the monitor 38 which predefined safety-relevant compressed reference display data 54 from the reference data set 52 are supplied to the checker 40.
  • the memory 50 can be stored in a storage medium, in particular in a flash.
  • the predefined safety-related compressed reference display data 54 and safety-related compressed display data 48 supplied to the checker 40 are compared with one another. After an evaluation 56 of this review, corresponding signaling is then initiated.
  • the monitor 38 has outputs 58, 60, 62, 64, 66 for initiating the corresponding signaling.
  • a mismatch between the safety-relevant compressed pixel-formatted display data 48 and the safety-relevant compressed reference display data 54 during the check this is indicated to the user by means of a first signal 68 on the display device 10, in particular by the signal lamps 19.
  • the SIL-2 LED 24 or optionally the marker LED 26 or an external device 70 can be used for the signaling.
  • the computer 30, the result of the failed check signaled is another error disclosure in the case of a faulty check.
  • Another error disclosure in the case of a faulty check is the switching off of the backlight 23 by the monitor 38.
  • the in Fig. 2 shown monitor 38 receives, as to Fig. 1 executed, the same safety-related basic data 34 as the computer 30, which generates 34 pixel-formatted display data 32 from the safety-related basic data.
  • the pixel-formatted display data 32 tapped before being fed to the screen 14 of the display device 10 are likewise fed to the monitor 38.
  • a module 72 'integrated in the display device 10 or in the monitor 38 which is referred to as the AIM (Display Integrity Module) 72, is part of the supervisor 38 and is responsible for the processing of the safety-related basic data 34 and the pixel-formatted display data 32
  • AIM 72 may be implemented as a FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), CPU (Central Processing Unit), or ASIC (Application Specific Intergrated Circuit).
  • the data to be read by the AIM 72 must be pre-converted in the case of a data format incompatible with the AIM 72.
  • configuration data 76 such as reference data 78 and / or initialization parameters 80, can be transmitted to the AIM 72 and stored in the memory 50.
  • these configuration data 76 typically must first pass through a controller 81, especially if the configuration data 76 is not AIM 72 compliant.
  • AIM 72 compatible data may be RGB666 data 91 as in Fig. 2 shown in dashed lines.
  • AIM 72 device-specific configuration data 76 ' such as a timer 82 or a reset function 84, can be sent by the configurator 74 directly to the AIM 72.
  • the reference data record 52 is stored in the memory 50 in configuration mode 74 'with predefined, safety-relevant compressed reference display data 54.
  • the configuration data 76 and initialization parameters 80 are read from the respective hardware components of the supervisor 38 and AIM 72, respectively, pre-resetting the AIM 72 and checking the memory 50 to ensure that no Error in the memory 50 is present.
  • the tapped, pixel-formatted display data 32 as well as the safety-related basic data 34 can now be read by the AIM 72.
  • the pixel-formatted display data 32 may be so-called serial LVDS (Low Voltage Differential Signal) data 93 which is not compatible with the AIM 72 data format, these pixel-formatted display data 32 may need to be converted to parallel video data 92 (this path is by means of a data converter 90) in Fig. 2 shown).
  • the data converter 90 in particular uses 18-bit and 24-bit LVDS pixel-formatted display data 32 as input data accepted.
  • the resolution and color depth of the video data 92 can be adjusted.
  • the data converter 90 may be applied either as part of the AIM 72 on the FPGA or ASIC, or separately (dashed in Fig.2 ) may be arranged in the monitor 38 by the ASIC or FPGA.
  • the video data 92 generated by the data converter 90 from the pixel-formatted display data 32 are fed to a window filter 94.
  • the window filter 94 detects the video data 92, which were generated for the user-selected screen page 18 and should be displayed on the screen 14 of the display device 10.
  • All inactive pixel-formatted display data 96 and so-called screen control signals 98, such as a start-of-line signal 98 ', are filtered out by the window filter 94.
  • the non-displayed area for screen pages 18, in particular the area for the screen control signals 98 can be defined.
  • pixel-formatted display data 32 are further processed by a compressor 100.
  • the compressor 100 reduces the color depth of individual pixels and / or summarizes several pixels in a pixel, as clearly shown in FIG Fig. 3 shown and in detail in the description of the figures Fig. 3 is explained.
  • the compression rate for the reduction of the color depth and the reduction of the resolution can be set in configuration mode 74 '.
  • the security-relevant regions 13 (see FIG Fig. 1 ) on the screen side 18 and which exclusively have the security-relevant compressed pixel-formatted display data 48 are filtered out by means of a region filter 104.
  • the region filter 104 filters out all the captured pixel-formatted display data 32 except for the security-relevant display data 46, which are located in the security-relevant regions 13.
  • corresponding regions 106 are in Fig. 5 for security-relevant screen pages 108.
  • the position of the security-relevant regions 13 on predefined screen pages 18 can be determined by means of an identification number.
  • the sequence of the above-mentioned filters can be arbitrarily selected in the compression method 42.
  • the video data 92 after the window filter 94 receive a new filtering by the region filter 104 and then only the compressor 100 is used.
  • the checker 38 would receive from the compressor 100 exclusively safety-relevant compressed display data 48 in the corresponding safety-relevant regions 13.
  • the safety-relevant compressed display data 48 located in the safety-relevant regions 13 are supplied to the checker 40 in separate registers 112. Subsequently, the verifier 40 compares the safety-relevant compressed display data 48 with the safety-related compressed reference display data 54, which was determined by the safety-related basic data 34 and supplied to the verifier 38 from the memory 50 in the operating mode 89.
  • An intermediate register 114 between the verifier 40 and the evaluation 56 allows a kind of buffering of the comparison results from the verifier 38. This may be necessary if, for example, a speed of 26 km / h is changed to another speed 27 km / h and the computer accordingly Time is required to bring this new speed on the screen 14 of the display device 10 for presentation. Even when changing the screen page 18, the computer requires time to implement the representation, so that the buffering is necessary here. Since the check lasts about 20 ms, which is too fast for the human eye, the buffer 114 also serves the user so that he can view the pixel-formatted display data 32 on the screen 14 sufficiently long to perceive it correctly.
  • Fig. 3 the speed of the vehicle of 26 km / h is displayed in the form of pixel-formatted display data 32 in the safety-relevant region 13. That is, the pixel-formatted display data 32 have been pre-filtered by the window filter 94 and the region filter 104, respectively, so that they are arranged on the screen side 18 in the relevant security-relevant region 13.
  • This first state 115 corresponds to the state after the data conversion from serial LVDS 93 into parallel video data 92 or after the direct supply of, for example, RGB666 data 91, so that either 18-bit or 24-bit video data 92 is present.
  • a first compression step 116 the color depth is reduced from 18 bits or 24 bits over an 8 bit gray level to a gray level smaller than 8 bits, in particular to a 1 bit black and white stage per pixel (in FIG Fig. 3 , second state view from above).
  • a second compression step 118 multiple pixel subfields 120, as in FIG Fig. 4 shown reduced to 1 pixel.
  • the advantage with this type of compression of the pixel-formatted display data 32 is that the distance, also called Hamming distance, can be selected between two security-relevant pixel-formatted display data 46 in such a way that the probability of a false check result is minimized or reduced below the permissible value ,
  • the latter can, for example, provide the defective security-relevant region 13 with an "X", as in FIG Fig. 3 shown in dashed lines.
  • the reviewer 38 recognizes the region 106 marked "X" by the computer and accepts that the security-related base data 34 in this region 106 is faulty.
  • the compression method 42 takes into account the perception of the human eye, where errors of individual pixels are generally of no relevance.
  • the marking of security-relevant screen pages 108 and non-security-relevant screen pages 110 can take place by means of the optical marker 28, as in FIG Fig. 5 and Fig. 6 shown.
  • the computer 30 converts the safety-related basic data 34 supplied to it and the basic data 36 which is not relevant to safety, that is to say the basic data 12 of a selected screen page 18, into pixel-formatted display data 32.
  • the corresponding pixel-formatted display data 32 are then supplied to the screen 14 for display.
  • a first optical marker 122 can be integrated into the pixel-formatted display data 32, as in FIG Fig. 5 shown.
  • a second optical marker 124 can be integrated into the pixel-formatted display data 32, as in FIG Fig. 6 shown.
  • the first optical marker 122 and the second optical marker 124 have information features with which the monitor 38 can distinguish the security-relevant screen pages 108 from the non-security-relevant screen pages 110.
  • the monitor 38 In configuration mode 74 ', if the optical marker 28 is to be used, the monitor 38 must be programmed with appropriate marker reference data. Accordingly, in the ready state, the supervisor 38 may compare the optical marker 28 with marker reference data during the review. On the one hand, if the monitor 38 determines that the second optical marker 124 is present, the check is turned off. However, if the monitor 38 determines that the first optical marker 122 is present, or if there is no match between the optical marker 28 and the marker reference data, a check is made.
  • the optical marker 28 consists of a sequence of predefined pixel patterns 130 and is located in particular at a predefined location in the security-relevant screen 108, as in Fig. 5 or in the non-security-relevant screen page 110, as in Fig. 6 shown.
  • the second optical marker 124 has a different sequence of pixel patterns 130 than the first optical marker 122.
  • the sequence and the time interval of a pixel pattern 130 are monitored by the monitor 38. If there is no match of correct sequence 128 and / or time interval 132 of the pixel pattern 130 with marker reference data, the supervisor 38 performs the control.
  • the signal 68 is sent to the display device 10 to indicate to the user that and which optical marker 28 is present (see Fig. 5 and Fig.6 ). This can be done, for example, by switching on the marker LED 26 and / or an external device 70, as related to Fig. 1 explained.
  • the computer 30 receives a set of predefined screen pages 18 which can be selected by the user, and the supervisor 38 receives the reference data set 78 discussed in the upper sections and the initialization parameters 80 (see FIG Fig. 2 ).
  • the desired screen page 18 may be selected on the screen 14 of the display device 10 by the user.
  • the backlight 23 and the SIL-2 LED 24 are turned off.
  • the error can also be signaled to the computer 30 so that it notes, for example, an "X" on the faulty safety-relevant region 13, instead of a speed, as in FIG Fig. 3 shown.
  • the SIL-2 LED 24 lights up and the backlight 23 remains lit.
  • the SIL-2 LED 24 and the SIL-2 LED 24 are identical to each other.
  • Marker LED 26 combined in one LED, so that the latter is always turned on when both the conditions for switching on the marker LED 26 as well as the conditions for switching on the SIL-2 LED 24 are met.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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Claims (12)

  1. Procédé de vérification de données d'affichage pixélisées, qui au moyen d'un ordinateur (30) génère d'une part des données de base (32) concernant la sécurité et qui sont acheminées vers l'écran (14) pour la représentation sur un écran (14) d'un appareil d'affichage (10), notamment un moniteur LCD dans le poste de conduite d'un véhicule,
    - dans lequel les données d'affichage pixélisées (32) concernant la sécurité sont d'autre part saisies avant l'écran (14) et converties dans un analyseur (38) au moyen d'un compresseur (100) en données d'affichage comprimées (48) et acheminées vers un vérificateur (40),
    - dans lequel un bloc de données de référence (52) avec des données prédéfinies d'affichage de référence comprimées (54) concernant la sécurité est stocké dans une mémoire (50) de l'analyseur (38) et les données de base (34) concernant la sécurité définissent dans l'analyseur (38) quelles données prédéfinies d'affichage de référence comprimées (54) concernant la sécurité du bloc de données de référence (52) sont acheminées vers le vérificateur (40),
    - le vérificateur (40) qui compare entre elles les données prédéfinies d'affichage de référence comprimées (54) concernant la sécurité et les données d'affichage comprimées (48) concernant la sécurité qui lui sont acheminées, ainsi que
    - en cas d'absence de concordance, ceci se manifeste à un utilisateur au moyen d'un premier signal (68) sur l'appareil d'affichage (10).
  2. Procédé selon la revendication 1, caractérisé en ce que le compresseur (100) réduit une profondeur colorimétrique des données d'affichage pixélisées (32), notamment d'un niveau colorimétrique de 18 bits respectivement de 24 bits sur un niveau de gris de 8 bits, à un niveau de gris inférieur à 8 bits par pixel.
  3. Procédé selon la revendication 2, caractérisé en ce que le compresseur (100) réduit à un pixel, une résolution d'un champ partiel (120) comportant plusieurs pixels, de telle sorte que les données d'affichage pixélisées (32) existent sous la forme de données d'affichage comprimées (48).
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce qu'en cas de concordance des données prédéfinies d'affichage de référence comprimées (54) concernant la sécurité avec les données d'affichage comprimées (48) concernant la sécurité, pour la constitution d'un deuxième signal (69), le vérificateur (40) commande une lampe de signalisation (19) sur l'appareil d'affichage (10), notamment une LED, notamment de telle sorte qu'elle s'allume ou qu'elle clignote.
  5. Procédé selon la revendication 4, caractérisé en ce qu'en cas de concordance des données prédéfinies d'affichage de référence comprimées (54) concernant la sécurité avec les données d'affichage comprimées (48) concernant la sécurité, pour la constitution du deuxième signal (69), le vérificateur (38) allume un rétroéclairage (23) de l'écran (14) sur l'appareil d'affichage (10) et en cas d'absence de concordance, il éteint le rétroéclairage (23) de l'appareil d'affichage (10) pour la constitution du premier signal (68).
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que les données de base (32) concernant la sécurité sont acheminées dans l'analyseur (38) vers un contrôleur (81) pour lire la mémoire (50) et pour acheminer les données correspondantes prédéfinies d'affichage de référence (54) vers le vérificateur (40).
  7. Procédé selon une des revendications 1 à 6, caractérisé en ce que la mémoire (50) est conservée dans un support de mémoire, notamment une mémoire flash.
  8. Procédé selon une des revendications 1 à 7, caractérisé en ce que les données de base (12) comportent aussi en plus des données de base (34) concernant la sécurité, des données de base (36) ne concernant pas la sécurité, de telle sorte que l'ordinateur (30) génère des données d'affichage pixélisées (32) à partir des données de base (34, 36) concernant la sécurité et ne concernant pas la sécurité.
  9. Procédé selon la revendication 8, caractérisé en ce que les données d'affichage pixélisées (32) saisies sont acheminées vers un filtre régional (104) et celui-ci filtre les données d'affichage pixélisées (102) ne concernant pas la sécurité, de telle sorte que le vérificateur (40) effectue la vérification exclusivement sur la base des données d'affichage pixélisées (46) concernant la sécurité.
  10. Procédé selon une des revendications 1 à 9, caractérisé en ce que lors de la génération des données d'affichage pixélisées (32), l'ordinateur (30) intègre un signal de commande de l'écran (98), comme par exemple un signal de début de ligne (98'), et un filtre à fenêtre (94) filtre ce signal de commande de l'écran (98) à partir des données d'affichage pixélisées (32) saisies.
  11. Procédé selon une des revendications 1 à 10, caractérisé en ce que les données d'affichage pixélisées (32) sont converties au moyen d'un convertisseur de données (90) à partir des données LVDS séries (93) en données vidéo parallèles (92), notamment dans un espace colorimétrique RVB avec profondeur colorimétrique de 18 bits ou 24 bits.
  12. Procédé selon une des revendications 1 à 11, caractérisé en ce que les données vidéo parallèles (92), comme par exemple les données vidéo parallèles RGB666 (91), ne nécessitent pas de conversion au moyen du convertisseur de données (90).
EP10009934.0A 2010-09-20 2010-09-20 Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule Revoked EP2439722B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10009934.0A EP2439722B1 (fr) 2010-09-20 2010-09-20 Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule
BRPI1105104-3A BRPI1105104A2 (pt) 2010-09-20 2011-09-19 processo para verificaÇço de dados de display formatados em pixel para apresentaÇço em um monitor de um aparelho indicador em um veÍculo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10009934.0A EP2439722B1 (fr) 2010-09-20 2010-09-20 Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule

Publications (2)

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EP2439722A1 EP2439722A1 (fr) 2012-04-11
EP2439722B1 true EP2439722B1 (fr) 2013-06-19

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EP10009934.0A Revoked EP2439722B1 (fr) 2010-09-20 2010-09-20 Procédé de vérification de données d'affichage pixellisées pour la représentation sur un écran d'appareil d'affichage dans un véhicule

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EP (1) EP2439722B1 (fr)
BR (1) BRPI1105104A2 (fr)

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DE102013012679A1 (de) * 2013-07-31 2015-02-05 Deuta-Werke Gmbh Verfahren und Vorrichtung zur Darstellung eines sicherheitsrelevanten Zustands
ES2619190T3 (es) 2014-12-30 2017-06-23 Matthias Auchmann Método y sistema para la visualización segura de información relevante para la seguridad
WO2018041777A1 (fr) * 2016-08-31 2018-03-08 Siemens Aktiengesellschaft Surveillance d'une indication dans une cabine de conduite d'un moyen de transport
DE102016217518A1 (de) 2016-09-14 2018-03-15 Robert Bosch Gmbh Vorrichtung und Verfahren zur Überwachung einer Nichtanzeige eines vorgegebenen Bildes, insbesondere eines Warnsymbols, in einem Display einer Anzeigevorrichtung
IT202200006290A1 (it) * 2022-03-30 2023-09-30 Hitachi Rail Sts S P A Gruppo di verifica, per verificare l'attendibilita' di informazioni di veicolo visibili su uno schermo video, in particolare per un veicolo su rotaia

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DE10252124B4 (de) 2002-11-04 2006-11-09 Siemens Ag Vorrichtung zur Geschwindigkeitsanzeige in Fahrzeugen
US7057630B2 (en) * 2003-01-24 2006-06-06 Microsoft Corporation System and method for determining display subsystem compliance
DE102004039498A1 (de) 2004-08-14 2006-02-23 Deuta-Werke Gmbh Verfahren und Vorrichtung zur Überprüfung des Zustandes eines TFT - bzw. LCD-Display für eine sicherheitsrelevante "Man-Machine-Interface" (MMI)
DE102005011942A1 (de) 2005-03-14 2006-09-21 Deuta-Werke Gmbh Verfahren zur Fehleroffenbarung bei Anwendung einer sicherheitsrelevanten Anzeige, insbesondere auf Basis eines LCD- bzw. TFT-Displays oder einer analogen Technolgie
DE102006017422B4 (de) * 2005-11-12 2024-07-25 Diehl Aerospace Gmbh Verfahren zum Überwachen der Ansteuerung von Bilddarstellungen, insbesondere aus sicherheitsrelevanten Rohdaten
DE102006004226A1 (de) * 2005-12-20 2007-06-21 Vossloh Information Technologies Gmbh Verfahren und Anordnung zur sicheren Überwachung und Auswertung von Betriebszuständen wenigstens eines Verkehrssteuerungssystems sowie deren Verwendung
DE102007048608A1 (de) * 2007-10-10 2009-04-16 Robert Bosch Gmbh Testeinrichtung, Anzeigevorrichtung und Verfahren zum Überprüfen einer Gültigkeit von Anzeigesignalen

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EP2439722A1 (fr) 2012-04-11

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