OLED Display Through-Hole Camera Isolation and Encapsulation
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Solution Overview
Problem
The challenge is to enhance the screen ratio of organic light-emitting diode (OLED) display devices while maintaining good package reliability, as existing methods like laser cutting can deteriorate the package reliability and affect the display effect.
Innovation Solution
The solution involves an OLED display device design with a substrate having a hollow region, display region, and non-display region, featuring isolation portions and an encapsulation layer to isolate light emitting device layers, along with a through-hole for embedding components like cameras, and using atomic layer deposition for an inorganic encapsulation layer to ensure high screen ratio and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If laser cutting technology is used to create the screen camera, then the screen ratio is increased, but the package reliability deteriorates
Solution Approach 1:
The patent extracts the camera component from the traditional display area by creating a through-hole in the hollow region, allowing the camera to be positioned outside the main display area while maintaining a high screen ratio. This extraction approach avoids laser cutting the light emitting device layer, thereby preserving package reliability.
Solution Approach 2:
The patent utilizes the thickness dimension by creating a through-hole that extends through the substrate, hollow region, light emitting device layer, and encapsulation layer. This dimensional approach allows the camera to be embedded in a different spatial plane, achieving high screen ratio without compromising the integrity of the light emitting device layer.
2Area of stationary object
If the light emitting device layer is cut or removed for camera embedding, then the screen ratio is increased, but the package reliability deteriorates
Solution Approach 1:
The camera is extracted from the display area and positioned in the hollow region. The through-hole provides a pathway for the camera without requiring removal or cutting of the light emitting device layer, thus maintaining package reliability while achieving high screen ratio.
Solution Approach 2:
The hollow region serves multiple functions: it provides structural support, defines the through-hole location, and accommodates the camera component. This multi-functional design allows the same structural feature to serve both mechanical and optical purposes without compromising reliability.
3Reliability
If isolation portions are added to separate light emitting device layers, then package reliability is maintained, but device complexity increases
Solution Approach 1:
The light emitting device layer is segmented into a first light emitting device layer and a second light emitting device layer, separated by isolation portions. This segmentation allows the camera to be positioned in the hollow region without affecting the integrity of either light emitting device layer, maintaining package reliability while managing complexity through systematic division.
Solution Approach 2:
The isolation portions act as intermediary structures between the first and second light emitting device layers. These isolation portions provide physical separation and support, enabling the through-hole to be formed without compromising the integrity of the light emitting device layers, thus maintaining reliability with controlled complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves a high screen ratio for OLED display devices while maintaining good package reliability, effectively preventing water vapor and oxygen ingress, thus extending the device's lifespan and performance.
Implementation Method 1
the inorganic layer is formed by atomic layer deposition or atomic layer implantation
Data Source
AI summary
The present disclosure provides an organic light emitting diode (OLED) display device, method of manufacturing the OLED display device, and an electronic device. Using an isolation portion for isolating a first light emitting device layer located at a side of the isolation portion closed to the display region from a second light emitting device layer located at a side of the isolation portion closed to the a through-hole. And using an encapsulation layer covering the light emitting device layer, the isolation portion, and the substrate to make the OLED display device has a high screen ratio while having good package reliability.