Method and device for operating an OLED device

Abstract

The invention relates to a method for operating an organic light emitting component ( 1 ), in particular organic light emitting diode (OLED), and an organic light emitting component ( 1 ) with an organic layer ( 1 c) comprising a plurality of different emitter materials, which emit light of different colours, and an electrode arrangement ( 1 a , 1 b) for applying electric control pulses to the organic layer ( 1 c), the method having the following steps: operating the organic light emitting component ( 1 ) with the help of the electric control pulses in a pulsed operating mode with an operating frequency of at least about 25 Hz; at least partially compensating an ageing induced varying colour change of the light emitted from the organic layer ( 1 c) during the course of the pulsed operation by recording at least one operating parameter characterizing the running pulsed operation of the organic light emitting component ( 1 ) and for which a dependence relationship to the ageing induced varying colour change is known at least approximately, and by adjusting a pulse height of the electrical control pulses according to the at least one recorded operating parameter and the ageing induced varying colour change; and regulating a predetermined luminance of the light emitted from the organic layer ( 1 c) during the course of the pulsed operation by adjusting a pulse length of the electric control pulses for regulating the predetermined luminance of the light emitted from the organic layer ( 1 c).

Description

technical field [0001] The invention relates to a method of operating an organic light-emitting element, in particular an organic light-emitting diode (OLED), and to an organic light-emitting element. Background technique [0002] Recently, organic light emitting diodes have received increasing attention. It also includes organic white light-emitting diodes. It is generally accepted that this technology has great application potential in lighting technology. Meanwhile, organic light-emitting diodes have achieved coefficients of performance in the range of conventional electric light bulbs (Forrest et al., Adv. Mater. 7, 624 (2004); but further improvements are expected. Thus, white light-emitting OLEDs have the potential to replace current lighting technologies that dominate the market, Such as incandescent lamps, halogen lamps, low-voltage fluorescent tubes, etc. [0003] However, technological improvements are still necessary in order to achieve technological breakthrou...

AI Technical Summary

Problems solved by technology

This differential aging limits the overall lifetime of white OLEDs because the weakened blue component causes a color shift from white regions to green and / or red

[0008] Moreover, in white OLEDs based on the emission of fluorescent blue emitters and on the emission of phosphorescent green and blue emitters, the lifetime of the green phosphorescent emitter can have a limiting effect on the overall lifetime

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