The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2022
Filed:
Jun. 30, 2020
Shanghai Tianma Micro-electronics Co., Ltd., Shanghai, CN;
Qijun Yao, Shanghai, CN;
Qing Zhang, Shanghai, CN;
SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., Shanghai, CN;
Abstract
A rollable display device including a rollable display module is provided. The rollable display module includes a hard film group and a flexible film group that are stacked, the hard film group has a greater overall Young's modulus than the flexible film group, and the rollable display device has a rolled state and an unrolled state; the hard film group includes a first surface facing away from the flexible film group in the unrolled state; the rollable display module is rolled towards the first surface in the rolled state; a minimum thickness of the flexible film group is D, a thickness of the hard film group is D, and D/(D+D)>πn/M, where n is a positive number that represents a preset number of rolling turns of the rollable display module, and M represents a failure strain of the flexible film group under a shearing stress.