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Method for operating a light-emitting device and arrangement

A technology of light-emitting devices and generators, applied in the field of device layout, to achieve the effects of prolonging service life and reducing energy loss

Inactive Publication Date: 2014-07-23
NOVALED GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic Light-Emitting Diodes Can Be Operated More Efficiently

Method used

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  • Method for operating a light-emitting device and arrangement
  • Method for operating a light-emitting device and arrangement
  • Method for operating a light-emitting device and arrangement

Examples

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Embodiment Construction

[0045] figure 1 A schematic illustration of an arrangement with a microcontroller 1 and a pulse width controller 2 whose output is coupled to an organic light emitting diode 3 is shown. The microcontroller 1 and the pulse width controller 2 form a driver circuit 4 with which the pulsed current is generated, the driver circuit 4 being coupled to the organic light emitting diode 3 during operation. according to figure 1 As illustrated in , the feedback of the pulse width controller 2 to the output of the microcontroller 1 takes place via the feedback line 5 . Feedback is used for measurements, which can be used in order to determine capacitance or instantaneous current.

[0046] figure 2 shows where the amplification by the measurement circuit 6 comes from figure 1 Schematic arrangement of the arrangement of , using the measuring circuit 6 , the average current is measured at the organic light-emitting diode 3 during operation, since the average current is shunted via the r...

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PUM

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Abstract

The invention relates to a method for operating a light-emitting device, wherein in the method a pulse current having a pulse frequency is generated by a driver circuit (4), which has a clock generator providing clock signals for the current pulsing. The invention also relates to a light-emitting device that is coupled functionally to the driver circuit (4) and is formed with one of more organic light-emitting diodes (3), and upon which the pulsed current acts at a pulse frequency of approximately 10 kHz to approximately 100 kHz, where T_PWM < (T_rise + T_fall) and where T_PWM is the pulse length for the clock signals generated by the clock generator of the driver circuit (4) and T_rise and T_fall indicate the pulse rise and the pulse fall time for the current pulses present at the one or more organic light-emitting diodes (3). The invention further relates to a corresponding arrangement.

Description

technical field [0001] The invention relates to a method for operating a light emitting device formed with one or more organic light emitting diodes, and also to an arrangement with such a device. Background technique [0002] A luminous means of this type can be used in different design variants, including in particular a luminous means configured as a lighting device. Organic light-emitting diodes (OLEDs) are becoming increasingly important in this environment. Similar to inorganic light-emitting diodes (LEDs), OLEDs are controlled in a current-driven manner. However, there are still some basic differences between these types of light emitting diodes with regard to requirements and characteristics. This is why specially equipped driver arrangements must be used for light-emitting devices with organic light-emitting diodes. [0003] LEDs are typically operated with pulsed current, wherein the brightness of the LED is controlled by the pulse width. However, changing of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/60Y02B20/30
Inventor 托尔斯滕·科伊姆斯文·穆拉诺奥利弗·朗古特
Owner NOVALED GMBH
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