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Foldable display design with generalized layer mechanical compatibility

A technology for organic, display devices, applied in the field of foldable display design with generalized layer mechanical compatibility

Active Publication Date: 2019-04-02
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strategies to control the position of the neutral plane or introduce multiple neutral planes in order to shield the display module are technically challenging, and slight changes in material properties or thickness can shift the neutral plane to the expected position of the neutral plane. above or below

Method used

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  • Foldable display design with generalized layer mechanical compatibility
  • Foldable display design with generalized layer mechanical compatibility
  • Foldable display design with generalized layer mechanical compatibility

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Embodiment Construction

[0017] In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration several specific embodiments. It is to be understood that other embodiments can be conceived and made without departing from the scope or spirit of the present disclosure. Accordingly, the following detailed description is not to be considered in a limiting sense.

[0018] Unless defined otherwise, all scientific and technical terms used herein have meanings commonly used in the art. The definitions provided herein are to facilitate the understanding of certain terms frequently used herein and are not meant to limit the scope of the present disclosure.

[0019] Unless otherwise indicated, all numbers expressing characteristic dimensions, quantities and physical properties used in the specification and claims are to be understood in all instances as being modified by the term "about". Accordingly, unless indicated...

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Abstract

The invention provides a flexible OLED display device that includes an upper module having a cover window film, a lower module, and a display module between the upper and lower modules. The display module includes an OLED and an OLED substrate. The stiffnesses of components in the display device are controlled to satisfy a particular relationship such that the bending stiffnesses of the upper andlower modules are tuned in order to position the neutral bending plane below the display module, which places the display into a state of compressive strain as opposed to zero strain. This design is suitable for a bifold flexible display in which the upper module can be folded to face itself.

Description

Background technique [0001] Displays and electronic devices have evolved to bend, bend or fold and provide new user experiences. For example, these device architectures may include flexible organic light emitting diodes (OLEDs), plastic liquid crystal displays (LCDs), and the like. [0002] A typical electronic display includes a lower module, a display module, and an upper module. The lower module may contain cooling fins and cushioning material. The upper module may contain a touch sensor, an ambient light suppression layer such as a circular polarizer, and often a protective film or cover. These three parts are often bonded together using adhesives. When the bonded construct flexes, strain develops throughout the structure. Strain is non-uniform in thickness and depends on the design of the display in a complex manner. If the strain exceeds a critical threshold in the display module, the display module will fail mechanically, resulting in display defects, general failu...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/00H01L27/32
CPCG06F3/041G06F2203/04102Y02E10/549H10K59/40H10K77/111H10K2102/311G06F1/1652H10K59/38H10K2101/00G06F3/0412H01L29/7842
Inventor 埃文·L·布里德洛夫凯瑟琳·A·莱瑟达尔柳德米拉·A·佩库洛夫斯基张培慧
Owner 3M INNOVATIVE PROPERTIES CO
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