Bending Protection Layer Layout for Uniform Flexible Displays
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Solution Overview
Problem
Existing display devices with bendable portions face challenges in minimizing damage and manufacturing costs while maintaining reliability during the manufacturing process.
Innovation Solution
A display device design featuring a polarization layer and a bending protection layer with pre-formed and post-formed layers, where the pre-formed layer is initially spaced apart from the polarization layer, and post-formed layers are formed on both sides, ensuring a uniform thickness and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bending protection layer is formed close to the polarization layer, then stress protection is improved, but manufacturing complexity increases due to difficulty in forming uniform thickness
Solution Approach 1:
The bending protection layer is divided into a pre-formed portion (formed before polarization layer) and a post-formed portion (formed after polarization layer). This segmentation allows each portion to be formed at optimal timing, ensuring uniform thickness while maintaining stress protection functionality.
Solution Approach 2:
The pre-formed bending protection layer is formed before the polarization layer is applied. This preliminary action establishes a foundation layer that can be uniformly formed, and subsequent post-formed layers are built upon it, ensuring overall uniformity while enabling close positioning to the polarization layer for stress protection.
2Manufacturing precision
If post-formed bending protection layers are added on both sides of the pre-formed layer, then uniform thickness is improved, but device complexity increases
Solution Approach 1:
The bending protection layer is segmented into three portions: pre-formed and post-formed layers on both sides. This segmentation enables each portion to contribute to uniform thickness - the pre-formed layer provides a stable base while the post-formed layers compensate for any thickness variations, achieving overall uniformity.
Solution Approach 2:
Different portions of the bending protection layer serve different functions: the pre-formed portion establishes the base thickness, while the post-formed portions on both sides locally adjust and compensate for thickness variations, ensuring uniform overall thickness across the entire layer.
Data Source
AI summary
A display device includes: a display panel having a first area, a second area spaced apart from the first area in a first direction, and a bending area between the first area and the second area; a polarization layer in the first area on the display panel; and a bending protection layer on the display panel and including: a pre-formed bending protection layer spaced apart from the polarization layer in the first direction; a first post-formed bending protection layer between the polarization layer and the pre-formed bending protection layer; and a second post-formed bending protection layer spaced apart from the first post-formed bending protection layer with the pre-formed bending protection layer interposed therebetween.