Glass Substrate Layout for Bendable Display Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with glass substrates face challenges in bending due to the high stiffness of glass, making it difficult to deform or bend them into various shapes while maintaining reliability.
Innovation Solution
A display device design featuring glass substrates with partially inclined side surfaces and a flexible display layer, combined with an encapsulation layer comprising inorganic and organic layers, allows for bending and increased reliability by etching the glass substrate to expose bending areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glass substrate is used in a display device, then structural integrity and reliability are improved, but bending capability and flexibility deteriorate
Solution Approach 1:
The glass substrate is divided into a first glass substrate and a second glass substrate that are separated by a bending area. This segmentation allows each glass substrate to maintain its structural integrity while the bending area provides flexibility and bendability, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
Different regions of the glass substrate structure are given different properties: the first and second glass substrates have high stiffness for structural integrity, while the bending area has reduced stiffness for flexibility. The inclined side surfaces are specifically designed in the bending area to facilitate bending while maintaining overall reliability.
2Adaptability or versatility
If the glass substrate is made thinner to improve bending capability, then flexibility is improved, but strength and resistance to external shocks deteriorate
Solution Approach 1:
The display device uses a composite structure combining glass substrates with an organic encapsulation layer and an inorganic encapsulation layer. This composite structure provides both flexibility for bending and sufficient strength to resist external shocks, resolving the contradiction between flexibility and strength.
Solution Approach 2:
The encapsulation layers (organic and inorganic) act as cushioning layers that protect the glass substrates from external shocks and damage. This beforehand protection allows the glass substrates to be thinner for flexibility while maintaining resistance to external shocks through the protective encapsulation layers.
3Adaptability or versatility
If the glass substrate is etched to expose bending areas, then bending capability is improved, but manufacturing complexity increases
Solution Approach 1:
The bending area is prepared in advance during the manufacturing process by removing the glass substrate in that specific region before assembling the display device. This preliminary action simplifies the overall manufacturing process compared to post-processing, as the bending capability is built into the structure during fabrication rather than requiring complex post-manufacturing modifications.
Data Source
AI summary
A display device includes a first glass substrate including a first side surface which is partially inclined, a second glass substrate including a second side surface which is partially inclined, the second glass substrate being apart from the first glass substrate, a display layer including a first area on the first glass substrate, a light-emitting device in the first area, a bending area extending from the first area, and a second area extending from the bending area and on the second glass substrate, and an encapsulation layer on the display layer, the encapsulation layer including an inorganic encapsulation layer and an organic encapsulation layer. Each of the first side surface and the second side surface is adjacent to the bending area.