Display Panel Cathode Hollowing for Under-Display Camera Transmittance
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Solution Overview
Problem
The presence of a cathode layer in a display panel adversely affects the transmittance, leading to poor imaging effects for cameras disposed in the display region.
Innovation Solution
The second cathode layer is provided with at least one hollowed-out region, and the auxiliary electrode layers are connected to ensure uniform voltage distribution and signal transmission, with auxiliary electrode patterns covering opaque patterns to minimize diffraction effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic light-emitting materials are used to achieve high color purity and emission efficiency, then display quality is improved, but the materials are easily degraded by oxidation and have short lifespans
Solution Approach 1:
An encapsulation layer comprising alternating organic and inorganic layers is introduced as an intermediary protective structure. The inorganic layers (siloxane-based) provide oxidation barrier functionality, while the organic layers (cyclic carboxylate-based) provide flexibility and adhesion, collectively protecting the light-emitting materials from degradation
Solution Approach 2:
The encapsulation layer uses composite material structure with alternating organic and inorganic layers. The inorganic siloxane layers provide oxidation resistance, while the organic cyclic carboxylate layers provide mechanical flexibility and adhesion, creating a synergistic protective barrier that extends material lifespan while maintaining emission efficiency
2Device complexity
If conventional encapsulation methods are used, then device structure is simple, but the encapsulation layers crack during bending and flexing
Solution Approach 1:
The encapsulation layer is designed with dynamic flexibility through alternating organic and inorganic layers. The organic cyclic carboxylate layers provide mechanical compliance that allows the structure to bend and flex without cracking, while the inorganic siloxane layers maintain protective functionality
Solution Approach 2:
The encapsulation layer uses thin film structure with alternating organic and inorganic layers. The organic layers act as flexible shells that accommodate bending and flexing, preventing crack formation while maintaining the protective encapsulation function
3Reliability
If multiple fabrication processes are used to create encapsulation layers, then protection performance is improved, but manufacturing complexity and costs increase
Solution Approach 1:
Multiple encapsulation layers with different functions (oxidation protection, flexibility, adhesion) are merged into a single alternating organic-inorganic structure. This unified approach achieves comprehensive protection performance while simplifying fabrication by depositing layers sequentially in one continuous process
4Reliability
If existing encapsulation materials are used, then material availability is good, but they cannot simultaneously provide oxidation protection and flexibility
Solution Approach 1:
The encapsulation function is segmented into alternating organic and inorganic layers, each performing specific functions. The inorganic siloxane layers provide oxidation protection, while the organic cyclic carboxylate layers provide flexibility and adhesion, achieving multiple functionalities simultaneously
Solution Approach 2:
Different regions of the encapsulation layer have different properties: inorganic layers provide oxidation resistance, while organic layers provide flexibility. This local differentiation of material properties enables the structure to simultaneously achieve protection and adaptability
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
The solution enhances light transmittance in the display region, improving camera imaging quality while maintaining luminance uniformity and display effectiveness.
Implementation Method 1
the first encapsulation layer may include an organic layer and an inorganic layer which are formed in an alternating manner... the inorganic layer may provide a barrier against oxidation
Implementation Method 2
both the light-emitting layer and the first encapsulation layer may be disposed on a substrate... the second encapsulation layer may be disposed on the first encapsulation layer
Implementation Method 3
desirable, both the light-emitting layer and the first encapsulation layer may be disposed on a substrate in a vacuum using a sputtering method or an evaporation method
Data Source
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AI summary
Disclosed are a display panel, a method for manufacturing the same and a display device, which relate to the field of display technologies. A second cathode layer included in the display panel is provided with a hollowed-out region, such that the second cathode layer will not entirely cover a second display region. Compared with a cathode layer that entirely covers the second display region, the second cathode layer can effectively reduce the impact on the light transmittance. Thus, a camera disposed in the second display region has an excellent imaging effect.