EP3646313A1 - Verfahren und vorrichtung zur ausgabe von bilddaten für eine sichere anzeige - Google Patents
Verfahren und vorrichtung zur ausgabe von bilddaten für eine sichere anzeigeInfo
- Publication number
- EP3646313A1 EP3646313A1 EP18753075.3A EP18753075A EP3646313A1 EP 3646313 A1 EP3646313 A1 EP 3646313A1 EP 18753075 A EP18753075 A EP 18753075A EP 3646313 A1 EP3646313 A1 EP 3646313A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- image data
- display device
- display
- data
- correction
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012937 correction Methods 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims description 17
- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 description 7
- 238000012806 monitoring device Methods 0.000 description 4
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 2
- 240000002834 Paulownia tomentosa Species 0.000 description 2
- 101000879675 Streptomyces lavendulae Subtilisin inhibitor-like protein 4 Proteins 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 101000880160 Streptomyces rochei Subtilisin inhibitor-like protein 2 Proteins 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/005—Adapting incoming signals to the display format of the display terminal
-
- 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
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/027—Arrangements or methods related to powering off a display
-
- 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
- G09G2340/06—Colour space transformation
-
- 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
Definitions
- safe displays are used, if the information is revealed ⁇ is relevant to safety. Such safe displays must meet a Safety Integrity Level SILO up to SIL4 and are used, for example, in rail vehicles or control stations of a railway installation. The use in other safety-relevant systems, such as nuclear power plants, is of course also possible.
- display devices such as TFT monitors
- TFT monitors When producing standard TFT modules, color values may fluctuate. This can lead to the so-called white point in each display device being able to lie at a somewhat different color location. If several such display devices are built next to each other, the differences in the color representation are noticeable. When these display devices have not been calibrated at the factory, and a corresponding adjustment of the image data to the spe ⁇ cial display device can take place. However, this can lead to problems if the changed image data for checking the secure display is to be compared with the given image data. Due to the individual color setting an error would be displayed.
- the invention is therefore based on the object to provide a method and apparatus for outputting image data for a reliable display, with which an individual color correction is possible.
- the object is achieved by a method for outputting image data for a reliable display, in which the image data for a display device are generated, in which the generated image data in dependence on a characteristic of the display device, in particular a Farbkorrekturoffsetwert, are changed and wherein for a Un ⁇ ter Kunststoff between generated and modified image data representative correction data are determined. Furthermore, the object is achieved by a device for
- Output of image data for a secure display with Wenig ⁇ least one device for generating image data for a display device and with at least one computing device for changing the image data generated in dependence on a characteristic of the display device, in particular a color correction offset value, and Determining formed for a difference between generated and changed image data representative correction data is formed.
- the inventive solution has the advantage that the corrective ⁇ tur schemes representative of the change in the image data and can be considered at a subsequent verification of the image data.
- a color balance for each individual display device such as a TFT monitor, possible and still the security-relevant verification of the displayed image data.
- the image data for the display device are initially generated in the usual way. Subsequently, these generated image data are changed so that a color correction for the specific display device takes place. This color correction is due to the sub ⁇ differences between different indicators for each Device individually.
- the correction data are determined according to the invention. These correction data are representative of the change in the image data and document a difference between the generated and the changed
- Image data With the help of the correction data, the change of the image data can be taken into account in the later checking of the image data, which is necessary according to SILO to SIL4. For example, the changed image data can be recalculated by means of the correction data.
- the inventive solution can be developed further by favorable Fully ⁇ staltungen, as described below.
- the changed image data can be recalculated by means of the correction data in such a way that they are equal to the generated image data, and the recalculated image data are compared with expected setpoint image data.
- the recalculated image data can be checked as usual.
- modified nominal value image data can be calculated from the expected nominal value image data and the correction data and these can be compared with the changed image data.
- individual setpoint values ie expected setpoint image data, would have to be calculated for each display device.
- these expected setpoint image data are safety-relevant, for example SIL2
- the creation would have to take place in a correspondingly secure manner and the expected setpoint image data would have to be validated.
- These individual modified nominal value image data for each display device could for example be stored in the display device itself.
- the generation of the changed setpoint image data could also be done in a secure part of the display device taking into account the correction data.
- at least one test value for the recalculated image data or the changed setpoint image data can be determined and for comparison the test value of the recalculated image data or the changed setpoint image data with at least one
- Check value for the expected setpoint image data to be compared The use of the test values has the advantage that the checking of the image data is simplified, computing power can be saved and the result of the check is available faster. For example, checksums or checksums can be calculated as the check value.
- a noticeable to an operator of reaction can is triggered, in particular a power supply to the pointing device ⁇ be turned off when an unacceptable result has been obtained when comparing.
- This has the advantage that, in the event of a fault, an immediate reaction is triggered, which can be seen, for example, by the driver or by another operator. Of course, any other perceptible consequence can be triggered in the case of an invalid result.
- the image data or test values can only be compared with respect to predetermined display areas of the display device.
- the correction data can be checked to see whether they lie within a predetermined permissible range.
- the correction data can be determined pixel by pixel and / or by color. This ensures that correction data is available even for the smallest units to be displayed.
- the image data contains values for each pixel, these values being composed of at least three color components. exist. From the three color components, the desired color is mixed together.
- this can be designed to carry out the method according to one of the aforementioned embodiments.
- the invention also relates to a rail vehicle with at least one display device designed for reliable display.
- the rail vehicle has a device according to the invention according to one of the aforementioned embodiments.
- the invention can also be used for example in nuclear power plants or aircraft.
- the invention also relates to a device for the reliable display of image data with a display device, with a device for outputting image data and with a comparison device for checking the image data.
- the device for generating image data is designed according to one of the aforementioned embodiments.
- the apparatus for outputting image data and the comparison ⁇ apparatus for checking the image data can be functionally configured independently.
- FIG. 1 shows a schematic representation of a device according to the invention for the reliable display of image data in an exemplary embodiment.
- the device 1 for the reliable display of image data for example, in a rail vehicle according to the invention
- the display device 2 (not shown), comprises a IDEein ⁇ direction 2, a device 3 for output of image data and a comparator 4.
- the display device 2 is for example a handelsübli ⁇ cher TFT monitor, are displayed on the image data.
- a speedometer or the like is shown on the display device 2.
- the display device 2 is powered by a power supply 5 with energy.
- the image data output device 3 has a device 6 for generating image data for the display device 2.
- the device 6 is, for example, a non-secure computer or computer with a corresponding graphics card with graphics output. Furthermore, for the output of image data comprises the Vorrich ⁇ tung 3, a processing module 7, which is arranged between said means 6 for generating image data, and the display device 2 and is connected to both.
- the processing module 7 comprises a switch 8, a deserializer 9, a computing device 10 and two serializers 11, 12.
- the image data generation device 6 provides the generated image data 13, a signal selection 14 and a color correction offset value 15.
- the generated image data 13 are, for example, an LVDS-18 bit signal with three lanes for color mixing and a clock signal indicating the clock for the image structure.
- the color correction offset value 15 indicates by how much actuation due to the so-called ⁇ white point of the individual display device 2 FER differs from a theoretically optimal white point from ⁇ .
- the generated image data 13, the signal selection 14 and the color correction offset value 15 are transmitted to the processing module 7.
- the switch 8 connects the generated image data 13, the signal selection 14 and possibly a signal 16 from an external interface 17.
- the switch 8 can be controlled in order, for example, to be able to switch over to an external signal from the external interface 17.
- the generated image data 13 from the switch 8 is forwarded via the deserializer 9 to the computing device 10.
- the image data 13 are not yet changed by the switch 8 or the deserializer 9.
- the computing device 10 changes the generated image data 13 to changed image data 18, taking into account the color correction offset value 15. Furthermore, the computing device 10 determines correction data 19 which indicates a difference between the changed Image data 18 and the generated image data 13 are representative.
- the changed image data 18 and the correction data 19 are passed via the serializers 11, 12 and then output by the processing module 7 to the display device 2 or to the comparison device 4.
- the comparison means 4 comprises a Studentswachungseinrich- tung 20 and also a processing module 21.
- the proces ⁇ beitungsmodul 21 has two deserializer 22, 23, an ad ⁇ decoding means 24 and a calculating means 25th
- the correction data 19 are transmitted from the device 3 for outputting image data directly to the comparison device 4.
- the changed image data 18 and also a clock signal 27 are transmitted from the device 3 to the display device 2.
- the modified image data 18 and the clock signal 27 for the comparison device 4 are tapped off.
- the modified image data 18 and the correction data 19 are transmitted via the deserializers 22, 23 to the adder 24.
- the adder 24 calculates the changed image data 18 by means of the correction data 19 in such a way that they are equal again with the generated image data 13.
- These recalculated image data 28 are sent to the computing device 25 passed. Clipping coordinates 29 are forwarded to the computing device 25 by the monitoring device 20.
- the detail coordinates 29 indicate the predetermined display areas of the display device 2, which are relevant to safety and therefore have to be checked.
- the term adder 24 is to be seen here only as an example. In the adder 24 other arithmetic operations can be performed as additions, beispielswei ⁇ se if the data previously obtained by subtraction. In any case, the adder 24 undoes the arithmetic operation, so that the recalculated image data 28 is again comparable to the generated image data 13.
- test values are calculated for the recalculated image data. This is done to simplify the over ⁇ examination of the image data. In order to further simplify the calculations, the test values for the recalculated image data 28 are only in the
- test values are, for example, checksums or checksums.
- the test values 30 are finally transmitted by the computing device 25 to the monitoring device 20.
- the test values 30 are compared with predefined and stored setpoint test values (not shown). These setpoint test values have been determined from expected setpoint image data (not shown). Only when the test values 30 are equal to the setpoint test values in the monitor 20, the display on the display device 2 is safe, and the operation can be continued. If the surveil ⁇ monitoring device 20, a deviation between check value 30 and reference value check value are detected, the monitoring ⁇ means 20 outputs a corresponding switch-off signal 31 to a disconnecting device 32.
- the disconnecting device 32 is examples game, a corresponding switch, the power supply 5 of the Display device 2 interrupts.
- a white balance for the display device 2 can be performed individually.
- individual production-related inaccuracies of the display ⁇ device 2 can be compensated.
- this can be checked using the Korrekturda ⁇ th 19 to meet the requirements for a secure ad in a safety-related system.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017214814.4A DE102017214814A1 (de) | 2017-08-24 | 2017-08-24 | Verfahren und Vorrichtung zur Ausgabe von Bilddaten für eine sichere Anzeige |
PCT/EP2018/070150 WO2019038009A1 (de) | 2017-08-24 | 2018-07-25 | Verfahren und vorrichtung zur ausgabe von bilddaten für eine sichere anzeige |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3646313A1 true EP3646313A1 (de) | 2020-05-06 |
EP3646313B1 EP3646313B1 (de) | 2024-04-03 |
Family
ID=63168366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18753075.3A Active EP3646313B1 (de) | 2017-08-24 | 2018-07-25 | Verfahren und vorrichtung zur ausgabe von bilddaten für eine sichere anzeige |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3646313B1 (de) |
DE (1) | DE102017214814A1 (de) |
WO (1) | WO2019038009A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4432273A1 (de) * | 2023-03-16 | 2024-09-18 | Siemens Mobility GmbH | Verfahren zum rechnergestützten betreiben einer sicheren optischen anzeige |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4332143A1 (de) | 1993-09-17 | 1995-03-23 | Siemens Ag | Verfahren zum Betrieb eines Datensichtgerätes und Einrichtungen zur Durchführung des Verfahrens |
KR20090091837A (ko) * | 2008-02-26 | 2009-08-31 | 명관 이 | 열차 차륜 모니터링 시스템 및 방법 |
EP2671374B1 (de) * | 2011-01-31 | 2015-07-22 | Dolby Laboratories Licensing Corporation | Systeme und verfahren zum wiederherstellen von farben und der nicht mit farben verbundenen integrität in einem bild |
JP2016042954A (ja) * | 2014-08-21 | 2016-04-04 | キヤノン株式会社 | 表示制御装置、表示システム及び表示制御方法 |
-
2017
- 2017-08-24 DE DE102017214814.4A patent/DE102017214814A1/de not_active Withdrawn
-
2018
- 2018-07-25 WO PCT/EP2018/070150 patent/WO2019038009A1/de unknown
- 2018-07-25 EP EP18753075.3A patent/EP3646313B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3646313B1 (de) | 2024-04-03 |
DE102017214814A1 (de) | 2019-02-28 |
WO2019038009A1 (de) | 2019-02-28 |
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