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Serial and parallel organic light-emitting diode light source

A light-emitting diode, organic technology, applied in the field of organic light-emitting diode light source, can solve the problems of small tolerance, OLED not working, difficult to manufacture, etc.

Inactive Publication Date: 2004-09-29
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is a problem with the parallel / series configuration that an open circuit failure of any OLED in a group will cause all OLEDs in the group to fail to work
The parallel / series configuration shown requires very tight tolerances in each masking step, making it difficult to manufacture

Method used

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  • Serial and parallel organic light-emitting diode light source
  • Serial and parallel organic light-emitting diode light source
  • Serial and parallel organic light-emitting diode light source

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Embodiment Construction

[0013] Refer to figure 1 The series / parallel OLED light source 10 according to an embodiment of the present invention includes the OLED 14 of the first group 12 and the OLED 14 of the second group 16. The OLEDs 14 in the first and second groups 12 and 16 are electrically connected in parallel, respectively, and the groups 12 and 16 are connected in series. A power source 18, such as a DC power source or a battery, is connected to the light source 10 to supply power to the light source. Obviously, for ease of description, two groups are shown in the figure, each with two diodes, but in the series / parallel configuration according to the present invention, more than two groups can be arranged, each with more than two diodes. This series / parallel configuration is superior to the prior art parallel / series structure because the series / parallel configuration allows both open-circuit faults and short-circuit faults when there are fuses, as described below.

[0014] When an open-circuit f...

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PUM

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Abstract

A OLED(organic light emitting diode) light source comprises a plurality of groups of OLEDs, wherein OLEDs of each of groups are electrically connected with each other in parallel, and groups are electrically connected with each other in serial.

Description

Technical field [0001] The present invention relates to an organic light emitting diode (OLED) light source, and more specifically, to a structure for electrically connecting a plurality of light emitting diodes in an OLED light source. Background technique [0002] U.S. Patent Application No. 2002 / 0190661 of Duggal et al., published on December 19, 2002, discloses an organic light emitting diode (OLED) light source including a plurality of OLEDs arranged in a plurality of groups. The OLEDs in the same group are electrically connected in series, and each group is electrically connected in parallel. This configuration is referred to herein as a parallel / series configuration. This parallel / series configuration can be used for AC voltage power supply when the voltage is much higher than the voltage drop of a single OLED, and tolerate short-circuit failure of one or more OLEDs in one or more groups. However, a problem with the parallel / series configuration is that an open circuit fai...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L27/32
CPCH01L51/5203H01L27/3288H05B33/0896H01L27/3202Y02B20/36H01L2251/564H01L27/3204H05B45/60Y02B20/30H10K59/84H10K59/86H10K59/179H10K71/841H10K59/82H10K50/805
Inventor D·R·斯特里普
Owner EASTMAN KODAK CO