Display Encapsulation Valley Structure to Prevent Overflow
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Solution Overview
Problem
Existing display devices face challenges in preventing the overflow of organic encapsulation layers, which can lead to reduced display area and increased non-display area, affecting the overall efficiency and reliability of the device.
Innovation Solution
The display device incorporates a thin film encapsulation layer with at least one groove on the circuit unit of the non-display area, which helps in preventing or checking the overflow of the organic encapsulation layer, thereby reducing the non-display area and expanding the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the organic encapsulation layer is extended to cover the circuit units, then the sealing reliability is improved, but the layer may overflow and increase the non-display area
Solution Approach 1:
The circuit unit is divided into a first circuit portion and a second circuit portion separated by a valley portion. The organic encapsulation layer is selectively applied to cover the first circuit portion while the valley portion prevents overflow onto the second circuit portion, thus segmenting the coverage area to prevent non-display area expansion.
Solution Approach 2:
The valley portion acts as an intermediary structure between the first and second circuit portions. It serves as a physical barrier that allows the organic encapsulation layer to cover the first circuit portion for sealing reliability while preventing the layer from extending onto the second circuit portion, thereby controlling the non-display area.
2Area of stationary object
If the non-display area is reduced to expand display area, then the display efficiency is improved, but the organic encapsulation layer may overflow and compromise device reliability
Solution Approach 1:
By segmenting the circuit unit into two portions separated by a valley, the design allows reduced non-display area while maintaining reliability. The valley creates distinct zones where the organic encapsulation layer can be precisely controlled to cover only the required first circuit portion without compromising device protection.
Solution Approach 2:
The valley portion serves as a mediator that enables compact design with reduced non-display area while ensuring device reliability. It allows the organic encapsulation layer to be confined to the first circuit portion, preventing overflow that would otherwise require larger non-display margins for reliability.
3Reliability
If the organic encapsulation layer covers the entire circuit unit, then the protection is improved, but the manufacturing precision is reduced due to overflow control difficulty
Solution Approach 1:
Segmenting the circuit unit with a valley portion provides a built-in manufacturing guide that simplifies the encapsulation process. The valley creates a natural boundary that makes it easier to control the organic encapsulation layer deposition, improving manufacturing precision while maintaining comprehensive protection over the first circuit portion.
Solution Approach 2:
The valley portion acts as a manufacturing intermediary that facilitates precise control of the organic encapsulation layer. It serves as a physical reference structure during fabrication, making it easier to achieve accurate coverage of the first circuit portion without overflow, thereby improving manufacturing precision while maintaining protection reliability.
Data Source
AI summary
A display device includes: a substrate including a display area and a non-display area; a circuit portion including a first circuit portion and a second circuit portion on the non-display area; a valley portion separating the first circuit portion and the second circuit portion from each other; and a thin film encapsulation layer sealing the display area, the thin film encapsulation layer extending from the display area to the valley portion, and the first circuit portion is between the valley portion and the display area, the second circuit portion is at an outside of the valley portion, an internal layer on the first circuit portion includes a plurality of island portions that are apart from one another in a first direction and a second direction crossing the first direction, and an external layer on the second circuit portion includes at least one groove extending in the first direction.