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Researchers Submit Patent Application, "Illuminant with at Least One Organic Light Emitting Diode", for Approval

August 27, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Vogt, Karl-Wilhelm (Ense, DE); Ludwig, Marco (Wickede, DE), filed on January 11, 2014, was made available online on August 14, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "Besides using non organic LEDs for replacing conventional illuminants increasingly LEDs are being used that are based on organic semiconductor technology. Illuminants with organic light emitting diodes (OLED) typically include a plate shaped carrier material, in particular glass on which the organic semiconductor components are applied. The voltage and power supply is provided by a metal layer that is vapor deposited on the carrier material. The carrier material is typically provided with a cover, typically another glass plate on its backside. Thus, the organic semiconductor components are supported between the carrier material and the cover. The cover, however, allows access to the metal layer in boundary areas so that the metal layer can be electrically contacted in several ways.

"Thus, is it known for example to fixate electrical conductors with a special conductive glue on the metal layer in order to be able to feed electricity. There is also an option to establish a connection with a conductive elastomeric material. Eventually there is a method to attach flexible conductor plates at the metal layer of the carrier material.

"These options for electrically connecting illuminants with organic LEDs have their own specific disadvantages. Thus, glue joints are rather sensitive with respect to shear loads. Therefore illuminants that are connected in this manner are typically arranged in housings with separate connecting contacts.

"When using electrically conductive elastomeric materials it is required to provide a compression of the elastomeric materials. Therefore also in this case the illuminant has to be pressed against a support. Additionally the transition resistances from elastomeric material to the illuminant are rather high.

"Using flexible conductor plates for electrically connecting organic LEDs is only useful for particular applications due to the sensitivity of the electrical conductor plates.

"The recited techniques are described for example in manufacturer guidelines for contacting OLEDs.

"An option to support illuminants including OLEDs is illustrated for example in DE 20 2006 012 937 and known from WO 2008/074431 A1.

"To sum it all up there is an urgent requirement in the art to improve the electrical contacting of illuminants including OLEDs and their support."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Thus it is an object of the invention to provide an advantageous electrical connection and support of illuminants based on OLEDs.

"The object is achieved by an illuminant including at least one organic light emitting diode which is applied to a carrier material that is vapor deposited with a metal layer which metal layer supplies the at least one organic light emitting diode with voltage and is connectable with connecting conductors, wherein at least one connecting contact is bonded on one side at least to the metal layer and on another side directly fixated in an insulating material housing.

"It is an essential advantage of the invention that the connecting contact is not only used for supplying the illuminant with power but also for supporting it at another component. Thus, the contact is directly fixated in the insulating material which in turn can be an element of a light, however the insulating material is preferably used as a base for the illuminant. The tasks of electrically contacting and mechanically supporting the illuminant that were considered and solved separately so far are thus united in one component.

"For producing the bonded connection between the metal layer of the carrier material and the connecting contact in particular ultra sound soldering is provided. Welding or gluing is also possible.

"Typically OLED illuminants are provided with plural connecting contacts per pole in order to provide an even voltage and power supply over the carrier surface provided with OLEDs. Typically plural contacts are provided per pole. When an insulation material housing embeds the illuminant according to an advantageous embodiment and thus forms a socket for the illuminant in a classical sense, identical poles can be electrically connected with one another within the insulation material housing in another preferred embodiment. This has the essential advantage that at least two of the connecting contacts are used for external electrical connection and complex wiring that would be otherwise required is considerably reduced.

"It is conceivable and advantageous when the contacts that are connected with the metal layer are indirectly, but in particular directly supported in the insulation material housing so they are accessible from an outside. Thus, electricity can be tapped at the connecting contacts for supplying another illuminant.

"The function of the connection contact as a mechanical support element for the illuminant in an insulation material facilitates providing an insulation material housing or a base for the illuminant where in the base terminates with the surface plane of the viewing surface of the illuminant and does not cover the illuminant. Thus uniform flat lights can be produced through arranging plural identical illuminants in series.


"Additional advantages of the invention can be derived from the subsequent description of an embodiment with reference to drawing Figures, wherein:

"FIG. 1. illustrates an illuminant according to the invention in an exploded view;

"FIG. 2 illustrates the assembled illuminant according to FIG. 1 in a vertical sectional view; and

"FIG. 3 illustrates a partial view of the illuminant according to FIG. 2 looking at a connection contact."

For additional information on this patent application, see: Vogt, Karl-Wilhelm; Ludwig, Marco. Illuminant with at Least One Organic Light Emitting Diode. Filed January 11, 2014 and posted August 14, 2014. Patent URL:

Keywords for this news article include: Patents, Electronics, Semiconductor, Light-emitting Diode.

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Source: Electronics Newsweekly

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