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
• • 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
  • 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
• • 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
  • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• • 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

Definitions

• the technical sector of the present invention is that of monitoring devices in information transmission systems.
• the object of the present invention is to provide a monitoring device capable of securing the information displayed on a screen and in particular capable of checking whether the display is not frozen.
• the subject of the invention is therefore a device for monitoring a screen intended to control the conformity of the information entered with respect to that emitted by an electronic module, characterized in that it comprises a means of comparison between a first datum displayed on the screen delivered by a generator and a second datum read on the screen by a detection means.
• the first data delivered by the generator appears on a detection area of the screen separate from information useful to a user.
• the first datum is of the all or nothing type.
• the first datum is of the random type.
• the first data item is displayed on the screen according to a periodic square white / black / white cycle.
• the detection means is a brightness sensor.
• the detection means is arranged substantially in line with the detection zone.
• the detection means transforms the reading of the first data in the detection zone into a signal transmitted to a transformation module.
• the transformation module delivers the second datum by means of comparison.
• the transformation module delivers the second data item in an all or nothing or random type by means of comparison.
• the comparison means compares the second datum read by the detection means and the first datum sent by the generator.
• the comparison means requests an alarm in the absence of correlation between the first datum and the second datum.
• the comparison means measures a time difference between the transmission of the first data by the generator and the reception of the second data.
• the comparison means requests an alarm for a time offset greater than a setpoint.
• the comparison means measures the time for the screen to warm up.
• the electronic module comprises a monostable device.
• a very first advantage of the monitoring device according to the invention lies in the fact that it detects and secures faults in electronic connections, glass / LCD connections, backlighting, liquid crystals.
• Another advantage of the device according to the invention lies in the fact that it works for all display methods employing any type of technology.
• Another advantage lies in the fact that its operation is rapid, automatic for a negligible cost in the face of the improvement in the level of security which it provides.
• Another advantage of the invention lies in its integrated alarm, measurement and maintenance function.
• the device in fact allows a real measurement of the optical switching by the quantity of light energy restored. Likewise, it measures the heating time.
• Another advantage resides in the fact that the device according to the invention allows the suppression of the screen temperature sensor present in most display technologies.
• FIG. 1 is a diagram representing the device according to the invention according to a first embodiment
• FIG. 2 is a partial representation of the device according to a second embodiment.
• FIG. 3 is a representation of an operating phase of the device according to the invention
• - Figure 4 is a representation of another operating phase of the invention.
• FIG. 1 shows a screen 1 observed by a user 2.
• This screen 1 is separated into two zones, one called the display zone 3 and the other detection zone 4.
• the display zone 3 delivers the information necessary for the user 2.
• the detection zone 4 is substantially arranged in a corner of the screen, more particularly at the bottom right. It is of course obvious that the invention cannot be limited to this provision. Indeed, this area can advantageously be placed on strategic rows or columns for the display area 3 or the user 2, and thus increase the level of security.
• the screen 1 is connected by an electrical conductor 17 to an electronic module 5 mainly comprising a data generator 6 and a comparison means 7.
• the data generator 6 transmits the information necessary to the display area 3 and to the area detection 4.
• This information is transformed into electrical stimuli by an electronic processing system 9 disposed near the screen 1. Among this information circulates a first datum symbolized by the arrow 8 more particularly assigned to the detection zone 4.
• the comparison means 7 is connected on the one hand, to the generator 6 by a conductor 18 thanks to which it receives a data symbolized by the arrow 8a substantially identical to the first data 8 sent to the screen, on the other hand to a module transformation 10 via a conductor 19.
• the comparison means 7 is capable of sending information 20 to control an alarm 21 via a conductor 14. This alarm is of known type and it does not is not necessary to describe it in more detail.
• the comparison means 7 also transmits information 22 on a conductor 23 to an acknowledgment and inversion module 15.
• the transformation module 10 is connected by an electrical conductor 12 to a detection means 11 which can advantageously be a light sensor. The latter, of a relatively small size, is arranged substantially opposite the detection zone 4. It is noted in this embodiment that the detection means 11 is visible to the user 2.
• This detection means 11 sends electrical stimuli 13a by the conductor 12 to the transformation module 10 which will convert them into a second datum 13.
• the latter is transmitted to comparison means 7 by the conductor 19.
• FIG 2 there is shown a sectional view of the screen 1 of the monitoring device according to a second embodiment.
• the detection means 11 is integrated into the rear face 24 of the screen.
• the electrical stimuli corresponding to the first datum 8 are reflected on a mirror 26 disposed by any means or integrated on a front face 27 of the screen visible to the user 2.
• An optical line 25 is practiced in the screen to highlight communication the mirror 26 with the detection means 11. The electrical stimuli are therefore returned to the detection means 11 by the mirror 26.
• the advantage of this embodiment is based on the fact that the detection means becomes invisible by the user.
• the operation of the monitoring device according to the invention is as follows. Referring to FIG. 1, it can be seen that the generator 6 sends the first datum 8. This datum will materialize in the detection zone 4. At the same time, the generator 6 sends the image 8a of the first datum 8 by means of comparison 7. The detection means 11 will then scan the zone 4 and emit electrical stimuli 13a, which will be transformed into a second datum 13 by the transformation module 10.
• the comparison means 7 is then in the presence, apart from the internal processing, of the first and the second data and can therefore compare them.
• the comparison means transmits a signal 22 to the acknowledgment and inversion module 15 which will authorize the generator to transmit another data, different from the previous one, for a new comparison.
• the signal 22 is also transmitted to the monostable device 16 which, on receiving it, attests to the proper functioning of the electronic module 5.
• the comparison means then sends a signal 20 to set off an alarm 21.
• the user 2 is thus warned of the presence of a fault and can then take the measures which are necessary. 'impose.
• This alarm can also be triggered by the monostable device 16 through a signal 28 if the comparison is no longer effective, for example, in the event of a failure of one of the elements of the electronic module 15.
• Figures 3 and 4 are illustrations of the first datum 8 displayed in the detection zone 4. This datum 8 is qualified as all or nothing because, in this example, it passes through two fundamentally opposite states, ie white or black, zero or one.
• the detection zone 4 is black and corresponds, for example, to a logic state equal to zero.
• This state is representative of the first datum 8 and of the datum 8a sent to the comparison means 7.
• the detection means 11, facing this black area, does not emit electrical stimuli 13a towards the transformation module 10. The latter will therefore transcribe this absence into a logical state equal to zero for the second datum 13.
• the comparison means analyzes the first and the second datum and concludes that they are identical. It then emits a signal 22 to pass to a second monitoring phase described below.
• the generator After acknowledgment and inversion, the generator sends the first datum 8 according to a logic state equal to one.
• the detection zone 4 then becomes white as illustrated in FIG. 4.
• the detection means 11 is then activated and transforms the brightness consecutive to the presence of white in electrical stimuli 13a.
• the transformation module 10 transcribes these stimuli into a logical state equal to one for the second datum 13.
• the comparison means 7 then compares the first and the second datum and concluded as described above.
• the comparison of a logical state can be replaced by an analysis of the time shifts. Indeed, one can define a time setpoint from the functional times of the device according to the invention. The comparison means 7 then compares this time setpoint with the time elapsed between the transmission of the first datum 8 and the reception of the second datum 13. Exceeding this setpoint causes the alarm 21 to be triggered. more, the measurement of this value makes it possible to calculate the reheating time required on screen 1 and therefore to eliminate a temperature measurement sensor usually used in screens.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Computer Hardware Design (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Alarm Systems (AREA)
• Burglar Alarm Systems (AREA)
• Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
• Testing And Monitoring For Control Systems (AREA)
• Indicating And Signalling Devices For Elevators (AREA)
• Selective Calling Equipment (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8858146

Family Applications (1)

Country Status (8)

Families Citing this family (8)

Family Cites Families (1)

• 2000
  • 2000-12-22 FR FR0016965A patent/FR2818777B1/fr not_active Expired - Fee Related
• 2001
  • 2001-12-19 PT PT01994902T patent/PT1354307E/pt unknown
  • 2001-12-19 ES ES01994902T patent/ES2238503T3/es not_active Expired - Lifetime
  • 2001-12-19 EP EP01994902A patent/EP1354307B1/de not_active Expired - Lifetime
  • 2001-12-19 WO PCT/FR2001/004056 patent/WO2002052525A1/fr not_active Application Discontinuation
  • 2001-12-19 AT AT01994902T patent/ATE295598T1/de active
  • 2001-12-19 DK DK01994902T patent/DK1354307T3/da active
  • 2001-12-19 DE DE60110839T patent/DE60110839T2/de not_active Expired - Lifetime

Non-Patent Citations (1)

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