Display Substrate Layout for Imaging and Fingerprint Integration
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Solution Overview
Problem
Existing OLED display panels face challenges in integrating additional functionalities such as imaging and fingerprint identification while maintaining efficient light emission and layout space optimization.
Innovation Solution
The display substrate incorporates a driving transistor with a strip-shaped channel region and a storage capacitor design that minimizes overlap with electrode plates, optimizing layout and reducing interference, along with a compensation transistor for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the channel region of the driving transistor is designed with a strip shape extending along the second direction, then the layout space is optimized and manufacturing precision is improved, but the overlap with electrode plates may increase causing performance interference
Solution Approach 1:
The channel region is designed to extend along the second direction (vertical direction) rather than the first direction (horizontal direction), changing the spatial orientation to achieve better layout optimization while controlling interference with electrode plates
Solution Approach 2:
The orthographic projection of the channel region is designed to only partially overlap with the gate electrode projection, creating a localized overlap region that balances manufacturing precision with performance requirements
2Adaptability or versatility
If additional functional components are integrated into the display panel, then functionality is enhanced, but the layout space and device complexity increase
Solution Approach 1:
The display panel integrates multiple functions including display, imaging, and fingerprint identification within a unified structure, allowing the same substrate to serve multiple purposes without requiring separate independent systems
Solution Approach 2:
The imaging components and fingerprint identification components are merged with the display structure, sharing common elements such as the substrate and signal transmission paths to reduce overall device complexity
3Reliability
If the orthographic projection of the channel region overlaps with the gate electrode projection, then electrical connection is improved, but manufacturing precision requirements increase
Solution Approach 1:
The channel region projection is designed to partially overlap with the gate electrode projection rather than fully overlapping, providing sufficient electrical connection while reducing the stringency of alignment precision requirements during manufacturing
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 the display substrate's functionality by optimizing layout space and reducing performance interference, enabling efficient light emission and integration of additional features like imaging and fingerprint identification.
Implementation Method 1
the light emitting device is configured to receive the driving current and is driven by the driving current to emit light
Data Source
AI summary
A display substrate and a display device are provided. In the display substrate, a first signal line transmitting a first scan signal extends along a first direction and a second signal line transmitting a data signal extends along a second direction; the data writing transistor transmits the data signal to the driving transistor under control of the first scan signal, the first scan signal is transmitted on the first signal line, and the data signal is transmitted on the second signal line; the driving transistor controls magnitude of a driving current according to the data signal; the channel region at least partially overlaps with the gate electrode; a planar shape of the channel region of the driving transistor is a strip shape extending along the second direction; the light emitting device receives the driving current and is driven by the driving current to emit light.