EP1971191A2 - Dispositif électrique/électronique destiné à la production de représentations colorées - Google Patents

Dispositif électrique/électronique destiné à la production de représentations colorées Download PDF

Info

Publication number
EP1971191A2
EP1971191A2 EP07025060A EP07025060A EP1971191A2 EP 1971191 A2 EP1971191 A2 EP 1971191A2 EP 07025060 A EP07025060 A EP 07025060A EP 07025060 A EP07025060 A EP 07025060A EP 1971191 A2 EP1971191 A2 EP 1971191A2
Authority
EP
European Patent Office
Prior art keywords
led
correction unit
circuit board
electronic device
correction data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07025060A
Other languages
German (de)
English (en)
Other versions
EP1971191B1 (fr
EP1971191A3 (fr
Inventor
Volker Grosch
Thomas Dipl.-Ing. Grossen
Frank Dipl.-Ing. Nockermann
Henning Dipl.-Ing. Marquardt
Matthias Donat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Insta Elektro GmbH and Co KG
Original Assignee
Insta Elektro GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Insta Elektro GmbH and Co KG filed Critical Insta Elektro GmbH and Co KG
Publication of EP1971191A2 publication Critical patent/EP1971191A2/fr
Publication of EP1971191A3 publication Critical patent/EP1971191A3/fr
Application granted granted Critical
Publication of EP1971191B1 publication Critical patent/EP1971191B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light

Definitions

  • the present invention is based on one designed according to the preamble of the two main claims electrical / electronic device for generating color representations in larger arrangements with several, each of the three primary colors (RGB) generating LED arrays.
  • Such electrical / electronic devices are provided in particular for producing a homogeneous color impression within larger arrangements with a plurality of LED arrangements.
  • Such larger arrangements can z. B. as a flat and / or spatially designed lights, display units, video walls, etc. be designed. Often it is important that not only a homogeneous color impression is created for the human eye, but that the individual colors can also be represented as saturated as possible.
  • an electrical / electronic device which has at least one printed circuit board, which is equipped with a plurality of LED arrays.
  • Such an electrical / electronic device is equipped with a driver circuit, via which each individual LED element of the LED arrays can be controlled individually, so that there is the possibility of color representation, each individual LED element of the LED arrays by a corresponding current supply to influence its colored light output.
  • the present invention seeks to provide an electrical / electronic device in which the production of saturated as possible colors in the color representation, the effects of corrections on the non-involved primary colors (RGB) are as low as possible and at the same time the greatest possible homogeneity of the colored light impression emitted by the arrangement is ensured.
  • RGB non-involved primary colors
  • the object is to be achieved by an electrical / electronic device according to the invention that the correction data and color measurement values determined by a photometric measurement can be made available at any time in a simple manner when controlling larger arrangements.
  • a second correction unit which has at least one further microprocessor for reading and processing the correction data belonging to a module circuit boards, wherein implemented in the microprocessor of the second correction unit, a further algorithm for controlling the light intensity impression is, by which depending on the correction data or color measurement values of the individual circuit boards, a weighting is made such that the circuit board, which has the lowest light intensity, the resulting light intensity for the module dictates. This ensures that in the case of a module consisting of several printed circuit boards, a light intensity impression which is as uniform as possible is generated.
  • each LED array 2 is provided for generating the three primary colors (RGB) red, green, blue.
  • RGB primary colors
  • each LED array 2 is designed as a three-color LED chip, which in each case three Has LED elements.
  • Each LED element is designed to produce one of the three primary colors (RGB).
  • a driver circuit not shown for the sake of simplicity, is provided. About the driver circuit, each individual LED element of all LED assemblies 2 can be influenced by appropriate energization in terms of its colored light output.
  • each LED element it is possible via the driver circuit for each LED element and thus set for each LED array 2 the colored light impression.
  • a lighting measuring device LTM is provided for photometric measurement of each LED array 2.
  • the printed circuit boards 1 are fed to the lighting measuring device LTM in order to be able to determine the respectively associated color measurement values and correction data.
  • each printed circuit board 1 is equipped with a connection interface 3 and with a correction unit 4.
  • Each correction unit 4 has a microprocessor 5 and a memory 6.
  • the adjustment is based on the fact that the colored light impression is determined beforehand by a photometric measurement for each individual LED arrangement producing the primary colors.
  • the operating parameters (energization) for all LED elements of the LED arrangements are then adjusted in such a way that a homogeneous color impression is produced for the human eye over the entire arrangement. Due to the principle of such a correction, however, the range of colors that can be displayed is limited in terms of their saturation, since for each of the three primary colors (RGB) that LED element of the LED arrangements must be taken into account whose respective primary color has the worst image quality.
  • each printed circuit board 1 is first supplied to a photometric measuring device LTM, via which the colored light impression is measured for each LED array 2 present on the printed circuit board 1.
  • a photometric measuring device LTM the photometric measuring device
  • the LED elements with respect to the three primary colors red, green and blue (RGB) by a driver circuit, not shown, are each individually controlled.
  • the light-technical measuring device LTM for each of the nine LED assemblies 2 of the colored light impression and then derived from the measurement resulting correction data or color measurements.
  • On each circuit board 1 is associated with the correction unit 4 associated with the memory 6 in connection with microprocessor 5 is present.
  • an algorithm which is implemented in the microprocessor 5 of the correction unit 4 is taken into account in addition to the correction data and the color measurement values.
  • the algorithm makes a weighting of the correction data or color measurement values stored in the memory 6 from the proportions of the three primary colors (RGB) red, green and blue such that individual LEDs representing the three primary colors (RGB) are weighted Elements of the LED arrays 2 are applied according to the algorithm with the weighted correction data.
  • a photometric adaptation for each individual LED element of the nine LED arrays 2 thus always takes place with operating parameters or an energization, which were calculated taking into account the correction data and the algorithm. This ensures that colors that are as saturated as possible are generated in the color representation because the effects of the corrections on the non-involved primary colors (RGB) are kept as low as possible by the algorithm.
  • each printed circuit board 1 is also provided with a connection interface 3 for forwarding both the correction data stored in the memory 6 and the color measured values stored in the memory 6.
  • Each connection interface 3 is for this purpose in turn electrically connected to the associated microprocessor 5 and the associated memory 6.
  • an electrical / electronic device for generating color representations in larger arrangements of a six circuit boards 1 having module M is formed.
  • a further microprocessor 8 and a further memory 9 has.
  • a further algorithm for controlling the light intensity impression is implemented.
  • a weighting of the correction data or color measurement values is carried out in such a way that the printed circuit board 1, which has the lowest light intensity, predetermines the resulting light intensity for all printed circuit boards 1 of the module M.
  • each of the nine LED arrays 2 is implemented as a tri-color LED chip producing the three primary colors (RGB), and the driver circuit is adapted to drive each individual LED element of the tri-color LED chips, the observer will also experience a colored light impression with a particularly good picture quality.
  • the second correction unit 7 is integrated into a personal computer PC which can be connected to the module M or is electrically connected to all subassemblies 10.
EP07025060.0A 2007-03-13 2007-12-22 Dispositif électrique/électronique destiné à la production de représentations colorées Not-in-force EP1971191B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007012007 2007-03-13

Publications (3)

Publication Number Publication Date
EP1971191A2 true EP1971191A2 (fr) 2008-09-17
EP1971191A3 EP1971191A3 (fr) 2012-09-12
EP1971191B1 EP1971191B1 (fr) 2013-04-10

Family

ID=39518138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07025060.0A Not-in-force EP1971191B1 (fr) 2007-03-13 2007-12-22 Dispositif électrique/électronique destiné à la production de représentations colorées

Country Status (2)

Country Link
EP (1) EP1971191B1 (fr)
DE (1) DE102008013121A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009030733B4 (de) * 2009-06-26 2015-11-05 Diehl Aerospace Gmbh Verfahren und Einrichtung zu farbvariabler Beleuchtung
DE202017102683U1 (de) 2017-05-05 2017-11-17 Mts Produkte Für Den Schwimmbadbau Und Die Unterwassertechnik Gmbh Anordnung zur Befestigung eines Scheinwerfers, insbesondere eines Unterwasserscheinwerfers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006014351U1 (de) 2006-09-19 2007-01-04 Tridonic Optoelectronics Gmbh LED-Modul mit RGB LED-Chips

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0830231A (ja) 1994-07-18 1996-02-02 Toshiba Corp Ｌｅｄドットマトリクス表示器及びその調光方法
JP2000020004A (ja) 1998-06-26 2000-01-21 Mitsubishi Electric Corp 画像表示装置
US6630801B2 (en) * 2001-10-22 2003-10-07 Lümileds USA Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes
US20050134525A1 (en) 2003-12-23 2005-06-23 Gino Tanghe Control system for a tiled large-screen emissive display
WO2005109854A1 (fr) * 2004-05-11 2005-11-17 Koninklijke Philips Electronics N.V. Procede de traitement de donnees d'image couleur
US7626345B2 (en) * 2005-02-23 2009-12-01 Dialight Corporation LED assembly, and a process for manufacturing the LED assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006014351U1 (de) 2006-09-19 2007-01-04 Tridonic Optoelectronics Gmbh LED-Modul mit RGB LED-Chips

Also Published As

Publication number Publication date
DE102008013121A1 (de) 2008-09-25
EP1971191B1 (fr) 2013-04-10
EP1971191A3 (fr) 2012-09-12

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