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Structured OLED with micro optics for generating directed light

A lighting equipment and optical collimation technology, which is applied in the directions of optics, nonlinear optics, electroluminescent light source, etc., can solve the problems of expensive and complicated manufacturing

Inactive Publication Date: 2012-12-05
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this solution allows the construction of lighting devices emitting directional light from large-area light emitters, the fabrication of such devices with multiple OLEDs is very complex and expensive

Method used

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  • Structured OLED with micro optics for generating directed light
  • Structured OLED with micro optics for generating directed light
  • Structured OLED with micro optics for generating directed light

Examples

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Embodiment Construction

[0030] refer to figure 1 , the lighting device 1 is formed by a stacked OLED 2 and a collimating lens array 3 . The lens array 3 is made of PMMA (polymethylmethacrylate), which is transparent in the visible wavelength range. Each single lens of the lens array 3 exhibits an acceptance angle such as figure 1 Indicated by the dotted line.

[0031] Separated from the lens array 3, the OLED stack 2 is arranged within a prescribed proximity. The OLED stack 2 comprises at least an OLED layer 4 and a first continuous electrode layer 5 arranged on the back side of the OLED layer 4 . A second electrode layer 6 is provided on the front side of the OLED layer 4 .

[0032] The second electrode layer 6 is continuous but is in contact with the OLED layer 4 only in sections 6 a which are within the acceptance angle of the lenses of the lens array 3 . Between these sections there is an insulating layer 9 . For this reason, the generation of light in the OLED layer 4 is only stimulated wi...

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Abstract

In a lighting device with at least one continuous OLED layer (4) with a first electrode layer (5), a second electrode layer (6) and a plurality of optical collimating means, the second electrode layer (6) is only in electrical contact with the OLED layer (4) within spaced sections (6a), arranged within acceptance angles of the collimating means. Such a lighting device can be manufactured efficiently and is highly energy-efficient.

Description

technical field [0001] The invention relates to a lighting device with an organic light emitting device (OLED). Background technique [0002] Organic light emitting devices are now readily available for integration into lighting or display products. OLED technology is particularly advantageous because it allows the manufacture of lighting devices which illuminate from a relatively large surface area while being able to be manufactured very thin. [0003] OLEDs exhibit a lambertian radiation mode, resulting in large beam divergence. For display applications, for example when using OLED layers as light source for a display panel, the Lambertian radiation mode is advantageous. On the other hand, for lighting or signaling applications, such as in automotive applications, a directed beam is often required. The problem of collimating light from large area light emitters such as OLEDs is difficult to solve because of the law of conservation of etendue. [0004] Document EP10515...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/00H01L51/52
CPCH01L51/5275H01L51/0071F21Y2105/008H01L2251/5361F21Y2105/00F21Y2115/15H10K85/657H10K50/858H05B33/06
Inventor G·卢特根斯B·斯品格
Owner SIGNIFY HLDG BV
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