Transparent Electrode Layer for Under-Screen OLED Display
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Solution Overview
Problem
Existing OLED display panels require boring to accommodate under-screen electronic components like cameras, leading to incomplete screen displays due to high light reflectance of silver in cathode structures, resulting in non-full-screen displays.
Innovation Solution
Incorporating transparent conductive layers in light-transmissive areas of OLED display panels, with optional magnesium-silver alloy or laminate layers in circuit and signal-wiring areas, allowing external light to pass through without removing display materials, thus eliminating the need for boring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnesium-silver alloy or laminated structure is used as the cathode to ensure electrical conductivity, then electrical performance is improved, but light reflectance increases causing loss of external light
Solution Approach 1:
The patent applies different electrode layer configurations to different display areas. In the electronic-component display area where under-screen cameras are located, a transparent conductive layer is used to minimize light reflection. In standard display areas, the traditional magnesium-silver alloy or laminated structure can be used for optimal electrical performance. This local differentiation resolves the contradiction by matching material properties to functional requirements in each zone.
Solution Approach 2:
The patent changes the optical parameters of the electrode layer by selecting transparent conductive materials with high transparency in the electronic-component display area, thereby reducing light reflectance while maintaining electrical conductivity. This parameter change allows the same electrode layer to serve both electrical and optical functions appropriately.
2Illumination intensity
If display material is removed above the camera position to ensure lighting effect, then light transmission is improved, but the area cannot be displayed losing full-screen capability
Solution Approach 1:
The patent implements local quality differentiation by using transparent conductive layers specifically in the electronic-component display area to maintain both light transmission and display functionality. The standard display areas retain their traditional structures for optimal display performance. This resolves the contradiction by allowing the camera area to transmit light while remaining part of the display, achieving true full-screen coverage without compromising illumination.
3Illumination intensity
If a transparent conductive layer is used in the electronic-component display area to allow light transmission, then light reach to electronic components is improved, but electrical conductivity may be reduced compared to magnesium-silver structures
Solution Approach 1:
The patent resolves this contradiction by applying transparent conductive layers only in the electronic-component display area where light transmission is critical, while using magnesium-silver alloy or laminated structures in standard display areas where electrical conductivity is the primary requirement. This spatial differentiation allows each material to optimize its performance for its specific functional context.
Solution Approach 2:
The patent employs composite material structures combining transparent conductive layers with other functional layers in the electronic-component display area. This composite approach maintains electrical conductivity through the transparent conductive layer while achieving the necessary light transmission properties, resolving the contradiction between optical and electrical performance.
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
Enables full-screen displays by allowing light to reach electronic components while maintaining display quality, preventing external light from affecting non-light-transmissive areas, and ensuring the electronic-component area can be displayed normally.
Implementation Method 1
By disposing the electrode layer in each light transmissive area within the electronic-component display area as the transparent electrode layer, external light passes through the transparent electrode layer to reach the electronic component located below the display screen
Implementation Method 2
Since silver has a large reflectance to light, loss is large when external light passes through the cathode structure
Data Source
AI summary
An organic light-emitting diode display panel and a display device are provided. By disposing the electrode layer in each light transmissive area within the electronic-component display area as the transparent electrode layer, external light passes through the transparent electrode layer to reach the electronic component located below the display screen, and the electronic-component display area can be displayed normally without removing the display material above the electronic component, that is, the boring is not required, thereby solving the defect that the prior art requires boring, and realizing the full-screen.