Transparent OLED Substrate for Under-Display Camera Integration
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Solution Overview
Problem
Display terminals with integrated cameras or sensors face challenges in achieving full-screen displays due to notches or holes, which reduce image quality and screen transparency, as external light can enter photosensitive elements, causing poor imaging effects.
Innovation Solution
An array substrate comprising a non-transparent OLED substrate partially surrounding a transparent OLED substrate with reduced pixel density in specific areas to enhance transparency, maintaining the light emitting structure layer's structure unchanged, and using uniformly distributed mask openings to prevent color mixing and wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of first electrodes is reduced to increase transparency of the transparent OLED substrate, then light transparency is improved, but manufacturing precision may be affected due to non-uniform mask openings
Solution Approach 1:
The patent applies local quality by differentiating the electrode configuration in different regions of the transparent OLED substrate. Specifically, the first electrodes are selectively omitted below certain light emitting structures while maintaining them in other areas, creating region-specific transparency. This allows the substrate to have high transparency in the camera region while maintaining normal display functionality in other regions, resolving the contradiction between overall transparency and manufacturing uniformity.
Solution Approach 2:
The patent segments the transparent OLED substrate into different functional regions: areas with first electrodes below light emitting structures (for normal display) and areas without first electrodes (for camera transparency). This segmentation is achieved through spatially selective electrode configuration, allowing different optical properties in different zones while maintaining uniform mask opening distribution through careful regional planning.
2Adaptability or versatility
If a notch is disposed on the display screen to integrate front camera and earphone, then component integration is improved, but screen-to-body ratio and display area are reduced
Solution Approach 1:
The patent extracts the camera and earphone components from the traditional notch configuration and relocates them to a dedicated component area below the transparent OLED substrate. This extraction eliminates the need for a visible notch on the display screen, allowing the display area to extend to the full screen while components are housed in a separate region that does not interfere with the display surface.
Solution Approach 2:
The patent moves components from the two-dimensional display plane (notch at the top) to a third-dimensional space below the substrate. By placing the component area underneath the transparent OLED substrate rather than cutting into the display area, the solution utilizes the z-dimension to accommodate components, thereby preserving the full screen-to-body ratio while achieving component integration.
3Adaptability or versatility
If a hole is drilled on the screen to dispose the camera, then camera integration is improved, but imaging quality deteriorates due to external light entering photosensitive element
Solution Approach 1:
The patent introduces a transparent OLED substrate as an intermediary layer between the external environment and the photosensitive element. This substrate acts as a controlled interface that allows light to pass through to the photosensitive element while preventing uncontrolled external light entry through holes. The transparent substrate mediates the optical path, enabling camera functionality while maintaining imaging quality by filtering and controlling light access.
Solution Approach 2:
The patent uses a thin transparent OLED substrate film to cover the component area containing the photosensitive element. This thin film structure provides a protective barrier that prevents direct light entry through holes while maintaining optical transparency for the camera's light sensing function. The flexible thin film conforms to the component layout and provides controlled optical access without compromising imaging quality.
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 improves light transparency and prevents color mixing at boundaries, ensuring high-quality imaging and full-screen display functionality while maintaining the normal display effect.
Implementation Method 1
a transparent second OLED substrate (100)... A photosensitive element that collects lights through the second OLED substrate is disposed in the component area
Implementation Method 2
The first OLED substrate is a non-transparent OLED substrate
Data Source
AI summary
An array substrate, a display screen and a display device. The array substrate includes a base substrate, a non-transparent first OLED substrate, and a transparent second OLED substrate. The first OLED substrate at least partially surrounds the second OLED substrate. The second OLED substrate includes a first electrode layer located on the base substrate, a light emitting structure layer located on the first electrode layer, and a second electrode layer located on the light emitting structure layer. The first electrode layer includes a plurality of first electrodes. The light emitting structure layer includes a plurality of light emitting structures. A number of the first electrodes is less than a number of the light emitting structures. Each of the first electrodes corresponds to one of the light emitting structures.