Transparent OLED Conductive Layer Thickness Variation
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Solution Overview
Problem
Conventional display panels with integrated light sensing elements, such as cameras, face challenges due to low light transmittance, which impairs the operation and image quality of these elements as they receive insufficient light, primarily due to the thickness of film layers.
Innovation Solution
A display panel design featuring a conductive layer with varying thickness in different regions, where the first display area has a thinner conductive layer than the second area, ensuring higher light transmittance for light sensing elements while maintaining adequate conductive and mechanical performance, utilizing materials like indium tin oxide or indium zinc oxide with specific thickness ratios and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the conductive layer is made thicker to improve conductive performance and mechanical strength, then electrical conductivity and structural stability are enhanced, but light transmittance decreases
Solution Approach 1:
The patent applies local quality by creating different thickness regions within the conductive layer: a first conductive layer with first thickness in the first display area and a second conductive layer with second thickness in the second display area. This allows each region to have optimized properties - the thinner first region provides high light transmittance for light sensing elements, while the thicker second region provides adequate conductivity and mechanical strength for non-display areas.
2Illumination intensity
If the film layer thickness is reduced to improve light transmittance, then light sensing element performance is enhanced, but mechanical strength and conductive performance deteriorate
Solution Approach 1:
The patent implements local quality by spatially differentiating the conductive layer thickness - using a thinner first conductive layer (first thickness) in the first display area where light transmittance is critical for light sensing elements, and a thicker second conductive layer (second thickness) in the second display area where mechanical strength and conductivity are prioritized.
3Ease of manufacture
If a uniform conductive layer is used across the entire display, then manufacturing simplicity is maintained, but light transmittance in sensor areas is insufficient
Solution Approach 1:
The patent resolves the contradiction between manufacturing simplicity and light transmittance by implementing local quality through a multi-layer conductive structure. The first conductive layer with reduced thickness is specifically positioned in the first display area to optimize light transmittance for light sensing elements, while the second conductive layer maintains adequate thickness in other areas, all within a single display panel structure that can be manufactured using standard OLED processes.
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 enhances light transmittance in the first display area, allowing light sensing elements to operate effectively by receiving sufficient light, thereby improving image quality and operational efficiency.
Implementation Method 1
the first display area has a thinner conductive layer than the second area, ensuring higher light transmittance for light sensing elements
Data Source
AI summary
A transparent OLED substrate, a transparent display panel, an array substrate, a display screen, and a display device. The transparent OLED substrate includes a base substrate, a driving circuit layer formed on the base substrate; and a light emitting functional film layer formed on the driving circuit layer. The driving circuit layer includes a plurality of first driving circuit units, the plurality of first driving circuit units each include a storage capacitor and a first transistor, the storage capacitor includes a first electrode plate and a second electrode plate. The driving circuit layer further includes a first conductive layer, a part of the first conductive layer is performed as the first electrode plate and other part is performed as a gate electrode of the first transistor.