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Rollable display device

A display device and curling technology, which can be used in identification devices, instruments, organic semiconductor devices, etc., can solve problems such as film cracking, affecting device performance and reliability, etc.

Active Publication Date: 2020-07-07
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] An embodiment of the present invention provides a rollable display device to solve the problem that the film layer cracks caused by the rolling process, which in turn affects the performance reliability of the device

Method used

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0034] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context cl...

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Abstract

The embodiment of the invention provides a rollable display device. The rollable display device comprises a rollable display module; the rollable display module comprises a hard film set and a soft film set which are arranged in a stacked mode; the total Young modulus of the hard film set is larger than that of the soft film set; the rollable display device comprises a curled state and a flattenedstate; in the flattened state, the surface of the side, away from the soft film set, of the hard film set is a first surface; in the curled state, the rollable display module curls towards one side of the first surface; the minimum thickness of the soft film set is D1; the thickness of the hard film set is D2; D1 and D2 satisfy the equation that D1 / (D1+D2)pi>n / a, wherein n is a preset curling turn number of the rollable display module, n is a positive number, and a is a failure strain of the soft film set under the action of shear stress. According to the rollable display device of the invention, the cracking of film layers caused by the failure strain of the soft film set due to the curled state can be avoided, and the performance reliability of the display device is improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a rollable display device. Background technique [0002] With the development of display technology, rollable display devices have appeared in recent years. The display module in the rollable display device adopts a rollable display module, that is, a flexible display module. When in use, the rollable display device is in a flattened state and has a larger display screen; when not in use, the rollable display device can be in a curled state, which is convenient for storage and carrying. Due to the occurrence of curling, compared with the flattened state, in the curled state, there will be misalignment between different film layers of the curlable display module, resulting in excessive strain at the bonding contact position between the film layers, and It causes cracking of the film layer at the edge, which in turn affects the performance reliability of the device. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/30
CPCG09F9/301H10K59/873H01L25/0753H01L27/156G06F1/1652H10K2102/311H01L33/44H10K50/844
Inventor 姚绮君张卿
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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