EP0866440A2 - Leuchtdiodenmatrix-Anzeigevorrichtung - Google Patents
Leuchtdiodenmatrix-Anzeigevorrichtung Download PDFInfo
- Publication number
- EP0866440A2 EP0866440A2 EP98102263A EP98102263A EP0866440A2 EP 0866440 A2 EP0866440 A2 EP 0866440A2 EP 98102263 A EP98102263 A EP 98102263A EP 98102263 A EP98102263 A EP 98102263A EP 0866440 A2 EP0866440 A2 EP 0866440A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- display
- current
- control
- display device
- error
- 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
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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
- 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
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S345/00—Computer graphics processing and selective visual display systems
- Y10S345/904—Display with fail/safe testing feature
Definitions
- the invention relates to a light-emitting diode matrix display device, in particular for outdoor use, with display points arranged in rows and columns, which can be controlled by means of a control device and by means of a monitoring device are monitored for display errors.
- DE 27 27 800 is in shape for a light-emitting diode display device a 7-segment display specified a monitoring device for display errors, which has a current sensor transistor. Such a monitoring device to use with an LED matrix is not an option because, because of the large number of display points, a lot of effort is required would.
- a similar monitoring device for a light emitting diode display device in a segment display, DE 36 20 584 A1 also shows whereby the open collector output of the segment display is used. Also this type of monitoring device is for a light-emitting diode matrix display device not suitable.
- DE 40 24 499 C1 shows a matrix display device in which the display points are formed by means of the light exit sides of optical fibers will.
- bistable closure elements are used arranged above the light exit side of the optical fibers.
- To open or closing the fasteners are set or Reset pulses applied, which are monitored by means of respective optocouplers will.
- the invention is based on the object of a generic light-emitting diode matrix display device to provide a with simple training provides reliable function monitoring.
- the monitoring device is a current monitoring device with current sensors with which a drive current each Display point detectable and the relevant device by means of the monitoring device Display point can be assigned. With these measures, every display point the display device monitors and localization of the incorrect display point.
- the effort for the control of the display device and the required Performance with simultaneous safe function monitoring of the individual display points are reduced by one per row or per column Current collector is provided and that the coordinate points of the correspondingly activating display points corresponding columns and rows in the Multiplex operation can be controlled with a frequency that activates the controlled LEDs above the flicker fusion frequency of the Eye results.
- An optimal display quality is maintained, whereby a high luminance can be achieved by the level of the control pulses can be adjusted to given external lighting conditions using pulse width modulation is.
- the location of the activated display point can be easily determined be that current signals fed back via a feedback line Current collector in the control device due to the existing in the same Time information of the line control in connection with the time information the column control with regard to an error of the to be activated Display point can be evaluated.
- the optocoupler can be connected in parallel, the drive current detected potential-free and the information about it to the control device be returned for evaluation without influencing the control becomes.
- Fault memory has that each display module according to the claims 2 to 5 is controllable and that the overall display by means of the control device can be assembled from the displays of the individual display modules.
- the monitoring device can be perfected in that per Display module a reference element is provided with which a long-term change the display properties of the display module can be detected, and / or that a temperature sensor is provided per display module and that a reference element signal or a temperature sensor signal with respect to a Deviation from a target value can be evaluated by means of the control unit.
- a corresponding Information on replacing the display module output will.
- a ventilation be switched on.
- the display device has a light-emitting diode matrix with in Rows y and columns x arranged display points L by a Light-emitting diode or a group of light-emitting diodes are formed.
- a Group of LEDs per display point L can e.g. increased display luminance achieved with high ambient luminance or color representations will.
- the display points L are from a control unit ST with a drive current supplied by the respective activated display point AL by Addressing the corresponding coordinate point x, y via an associated one Row control line ZL and an assigned column control line SL is fed.
- a current collector S is arranged, with which the control current of the activated display point AL (illuminated point) detected and fed to the control unit ST via a feedback line ME.
- a fault memory FSP is arranged in the control unit ST, in which a ID is stored in the event of a missing or faulty control current.
- an arrangement of the current sensors S in the Column control lines SL possible.
- the display points L are driven via a series resistor R v located in the line drive line ZL.
- the current sensor S in the form of an optocoupler OK is connected in parallel with the series resistor R v in series with a measuring resistor R M.
- the optocoupler OK gives a potential-free current measurement and does not falsify the control current.
- An entire display device can be composed of several display modules be according to the description above are built up.
- a control device of which the control unit ST with The fault memory FSP forms part of the display of the individual Display modules are coordinated to the overall display. Every display module has its own monitoring device with which the display errors within of the display module can be determined and evaluated. It is also possible a further error analysis of the display modules in the parent Control device to perform.
- the error detection in the control unit takes place in connection with that in the Control unit available control information of the individual display points L.
- the control of the display points L is row by row and column by column Multiplex operation carried out, with only one display module at a time one display point L, which may consist of several light-emitting diodes can exist, is controlled.
- the drive frequency is so high that the intermittent activation is not perceived by the eye, i.e. is above the flicker fusion frequency.
- the luminance of the display points L can be selected by means of pulse width modulation, whereby relatively high instantaneous luminance levels can be achieved by controlling the pulse width are.
- the information known how high the respective control current must be so that by comparison with the feedback signal of the current collector L also the failure of individual LEDs by comparison with the respective setpoint can be determined.
- the correct color representation can be inferred in this way will.
- Evaluation unit determines the necessary conclusions for error handling will. It can be decided whether an error message in the event of failure one or more display points L should take place. With a certain adjustable Number of missing active display points AL can the display device due to representations that are no longer clearly recognizable (mutilation) should be switched off.
- a reference element RE can be provided; in the event of a deviation from a predefinable one
- the setpoint can be set via the control unit or control device appropriate information for replacing the display module is output will.
- a temperature sensor TS can be provided at a suitable point be e.g. to activate a cooling device or the display device at Danger of switching off.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
Description
- Fig. 1
- schematisch den Aufbau einer Leuchtdiodenmatrix-Anzeigevorrichtung und
- Fig. 2
- einen Ausschnitt der Leuchtdiodenmatrix-Anzeigevorrichtung nach Fig. 1 mit einer genaueren Darstellung eines Stromaufnehmers.
Claims (7)
- Leuchtdiodenmatrix-Anzeigevorrichtung, insbesondere für den Außenbereich, mit in Zeilen und Spalten angeordneten Anzeigepunkten, die mittels einer Steuereinrichtung ansteuerbar sind und mittels einer Überwachungseinrichtung auf Anzeigefehler überwacht sind,
dadurch gekennzeichnet,daß die Überwachungseinrichtung eine Stromüberwachungseinrichtung mit Stromaufnehmer (S) aufweist, mit denen ein Ansteuerstrom jedes Anzeigepunktes (L) erfaßbar und mittels der Überwachungseinrichtung dem betreffenden Anzeigepunkt (AL) zuordenbar ist. - Anzeigevorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß pro Zeile (y) oder pro Spalte (x) ein Stromaufnehmer (S) vorgesehen ist unddaß die den Koordinatenpunkten (x,y) der zu aktivierenden Anzeigepunkte (AL) entsprechenden Spalten (x) und Zeilen (y) zyklisch im Multiplexbetrieb mit einer Frequenz ansteuerbar sind, die eine Aktivierung der anzusteuernden Leuchtdioden oberhalb der Flimmerverschmelzungsfrequenz des Auges ergibt. - Anzeigevorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,daß über eine Rückmeldeleitung (ME) zurückgeführte Stromsignale der Stromaufnehmer (S) in der Steuereinrichtung (ST) aufgrund der in derselben vorhandenen Zeitinformation der Zeilenansteuerung in Verbindung mit der Zeitinformation der Spaltenansteuerung hinsichtlich eines Fehlers des zu aktivierenden Anzeigepunktes (AL) auswertbar sind. - Anzeigevorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die Stromaufnehmer (S) durch den Zeilenansteuerleitungen (ZL) bzw. Spaltenansteuerleitungen (SL) parallel geschaltete Optokoppler (OK) gebildet sind. - Anzeigevorrichtung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,daß die Steuereinrichtung (ST) einen Fehlerspeicher (FSP) aufweist, in dem Fehlermeldungen hinterlegbar sind, unddaß aufgrund der hinterlegten Fehlermeldungen eine Fehleranzeige und/oder Ausschaltung der Anzeigevorrichtung steuerbar ist. - Anzeigevorrichtung nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,daß sie aus mehreren Anzeigemodulen zusammengesetzt ist,daß jedes Anzeigemodul eine zu der Steuereinrichtung gehörende Steuereinheit (ST) mit Fehlerspeicher (FSP) aufweist,daß jedes Anzeigemodul entsprechend den Ansprüchen 2 bis 5 steuerbar ist unddaß mittels der Steuereinrichtung die Gesamtanzeige aus den Anzeigen der einzelnen Anzeigemodulen zusammensetzbar ist. - Anzeigevorrichtung nach Anspruch 6,
dadurch gekennzeichnet,daß pro Anzeigenmodul ein Referenzelement (RE) vorgesehen ist, mit dem eine Langzeitveränderung der Anzeigeeigenschaften des Anzeigemoduls erfaßbar ist, und/oderdaß ein Temperatursensor (TS) pro Anzeigemodul vorgesehen ist unddaß ein Referenzelementsignal bzw. ein Temperatursensorsignal hinsichtlich einer Abweichung von einem Sollwert mittels der Steuereinheit (ST) auswertbar ist/sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19710855 | 1997-03-15 | ||
DE19710855A DE19710855A1 (de) | 1997-03-15 | 1997-03-15 | Leuchtdiodenmatrix-Anzeigevorrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0866440A2 true EP0866440A2 (de) | 1998-09-23 |
EP0866440A3 EP0866440A3 (de) | 2001-02-07 |
EP0866440B1 EP0866440B1 (de) | 2004-09-29 |
Family
ID=7823532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98102263A Expired - Lifetime EP0866440B1 (de) | 1997-03-15 | 1998-02-10 | Leuchtdiodenmatrix-Anzeigevorrichtung |
Country Status (4)
Country | Link |
---|---|
US (1) | US6486860B1 (de) |
EP (1) | EP0866440B1 (de) |
AT (1) | ATE278234T1 (de) |
DE (2) | DE19710855A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1306826A1 (de) * | 2000-07-28 | 2003-05-02 | Nichia Corporation | Anzeigesteuerschaltung und anzeigevorrichtung |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1025501B1 (de) * | 1997-10-29 | 2002-04-03 | Continental Teves AG & Co. oHG | Verfahren und vorrichtung zur überprüfung einer fehlerüberwachung einer schaltung |
DE19951348A1 (de) * | 1999-10-25 | 2001-05-31 | Dambach Werke Gmbh | Anzeigevorrichtung |
DE10048440A1 (de) * | 2000-09-29 | 2002-04-25 | Siemens Ag | Anzeigemodul zur Bildung eines aus mehreren benachbart zueinander angeordneten und optisch gekoppelten Anzeigemodulen aufgebauten Anzeigeelements sowie Anzeigeelement |
DE10121177A1 (de) | 2001-04-30 | 2002-11-14 | Aeg Ges Moderne Inf Sys Mbh | LCD-Zelle |
DE10125673A1 (de) | 2001-05-25 | 2002-12-05 | Aeg Ges Moderne Inf Sys Mbh | LCD-Zelle |
DE10158784B4 (de) * | 2001-11-30 | 2006-03-16 | Infineon Technologies Ag | Verfahren zum Bestimmen eines Abstands von Prozessoreinheiten zu mindestens einer Referenzposition in einer Prozessor-Anordnung und Prozessor-Anordnung |
EP1449110A2 (de) * | 2001-11-30 | 2004-08-25 | Infineon Technologies AG | Verfahren zum bestimmen eines abstands von prozessoreinheiten zu mindestens einer referenzposition in einer prozessor-anordnung und prozessor-anordnung |
JP3866606B2 (ja) * | 2002-04-08 | 2007-01-10 | Necエレクトロニクス株式会社 | 表示装置の駆動回路およびその駆動方法 |
AU2003229382B2 (en) * | 2002-05-28 | 2008-07-10 | Compusign Pty Ltd | Array monitoring |
AUPS261402A0 (en) * | 2002-05-28 | 2002-06-20 | Compusign Pty Ltd | Array monitoring |
JP4001331B2 (ja) * | 2002-06-27 | 2007-10-31 | 本田技研工業株式会社 | エンジン始動装置 |
JP3950845B2 (ja) * | 2003-03-07 | 2007-08-01 | キヤノン株式会社 | 駆動回路及びその評価方法 |
DE102004034761A1 (de) * | 2004-07-12 | 2006-02-02 | E.G.O. Elektro-Gerätebau GmbH | Kochsystem mit Anzeigevorrichtung |
CN100405072C (zh) * | 2004-08-10 | 2008-07-23 | 康佳集团股份有限公司 | 一种led屏坏点检测方法及其所用的电路 |
DE102009042619B3 (de) * | 2009-09-23 | 2010-12-09 | Audi Ag | Anzeigevorrichtung |
US20110140992A1 (en) * | 2009-12-16 | 2011-06-16 | Isign Display Systems Llc (Hangzhou) | LED display |
CN101964166A (zh) * | 2010-09-13 | 2011-02-02 | 南京通用电器有限公司 | 一种led显示屏坏点检测电路及检测方法 |
DE102012212356A1 (de) * | 2012-07-13 | 2014-01-16 | Siemens Aktiengesellschaft | Verfahren zum Anzeigen des Zustandes von Zeilen zugehörenden, zu überwachenden Objekten und Zustandsanzeige-Anordnung |
CN113707569B (zh) * | 2021-08-25 | 2024-02-09 | 厦门天马显示科技有限公司 | 显示面板的检测方法、显示面板 |
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DE2952009A1 (de) * | 1979-12-21 | 1981-07-09 | Günter Wulff-Apparatebau GmbH, 1000 Berlin | Pruefschaltung fuer optische anzeigeorgane |
DE3206123A1 (de) * | 1982-02-20 | 1983-09-01 | Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen | Verfahren und schaltungsanordnung zur kontrolle und fehlererkennung beim betrieb einer mehrstelligen fluoreszenzanzeige |
US4764728A (en) * | 1985-08-29 | 1988-08-16 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for detecting position of faulty light emitting element in large screen display system |
EP0295478A2 (de) * | 1987-06-03 | 1988-12-21 | Prisma Skyltreklam Ab | Elektronische Anzeige mit in Reihen und Spalten angeordneten Glühbirnen |
GB2210720A (en) * | 1987-10-09 | 1989-06-14 | Eric Cheng | LED displays |
US5113134A (en) * | 1991-02-28 | 1992-05-12 | Thomson, S.A. | Integrated test circuit for display devices such as LCD's |
US5444390A (en) * | 1994-02-02 | 1995-08-22 | Texas Digital Systems, Inc. | Means and method for sequentially testing electrical components |
US5594463A (en) * | 1993-07-19 | 1997-01-14 | Pioneer Electronic Corporation | Driving circuit for display apparatus, and method of driving display apparatus |
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-
1997
- 1997-03-15 DE DE19710855A patent/DE19710855A1/de not_active Withdrawn
-
1998
- 1998-02-10 AT AT98102263T patent/ATE278234T1/de not_active IP Right Cessation
- 1998-02-10 DE DE59812012T patent/DE59812012D1/de not_active Expired - Fee Related
- 1998-02-10 EP EP98102263A patent/EP0866440B1/de not_active Expired - Lifetime
- 1998-03-06 US US09/036,386 patent/US6486860B1/en not_active Expired - Fee Related
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DE2952009A1 (de) * | 1979-12-21 | 1981-07-09 | Günter Wulff-Apparatebau GmbH, 1000 Berlin | Pruefschaltung fuer optische anzeigeorgane |
DE3206123A1 (de) * | 1982-02-20 | 1983-09-01 | Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen | Verfahren und schaltungsanordnung zur kontrolle und fehlererkennung beim betrieb einer mehrstelligen fluoreszenzanzeige |
US4764728A (en) * | 1985-08-29 | 1988-08-16 | Mitsubishi Denki Kabushiki Kaisha | Apparatus for detecting position of faulty light emitting element in large screen display system |
EP0295478A2 (de) * | 1987-06-03 | 1988-12-21 | Prisma Skyltreklam Ab | Elektronische Anzeige mit in Reihen und Spalten angeordneten Glühbirnen |
GB2210720A (en) * | 1987-10-09 | 1989-06-14 | Eric Cheng | LED displays |
US5113134A (en) * | 1991-02-28 | 1992-05-12 | Thomson, S.A. | Integrated test circuit for display devices such as LCD's |
US5594463A (en) * | 1993-07-19 | 1997-01-14 | Pioneer Electronic Corporation | Driving circuit for display apparatus, and method of driving display apparatus |
US5444390A (en) * | 1994-02-02 | 1995-08-22 | Texas Digital Systems, Inc. | Means and method for sequentially testing electrical components |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1306826A1 (de) * | 2000-07-28 | 2003-05-02 | Nichia Corporation | Anzeigesteuerschaltung und anzeigevorrichtung |
EP1306826A4 (de) * | 2000-07-28 | 2006-07-05 | Nichia Corp | Anzeigesteuerschaltung und anzeigevorrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE59812012D1 (de) | 2004-11-04 |
EP0866440A3 (de) | 2001-02-07 |
EP0866440B1 (de) | 2004-09-29 |
ATE278234T1 (de) | 2004-10-15 |
US6486860B1 (en) | 2002-11-26 |
DE19710855A1 (de) | 1998-10-01 |
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