Detection Substrate for Integrated Fingerprint and Brightness Compensation
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Solution Overview
Problem
Existing OLED display panels lack effective integration of brightness compensation and fingerprint identification, leading to inefficiencies in light emission and fingerprint detection due to the lack of specialized substrates that can simultaneously perform these functions without interference.
Innovation Solution
A detection substrate with device pairs for fingerprint identification and brightness detection, including PN or PIN junctions, is integrated into an OLED display panel, allowing for simultaneous detection and compensation of light emission and fingerprint identification without interference, using a layered structure with opaque electrodes and transistors to manage electrical signals independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If brightness compensation and fingerprint identification are performed using separate structures in existing OLED display panels, then the functions can be implemented, but the structure becomes complex and the aperture ratio is reduced
Solution Approach 1:
The patent combines brightness compensation and fingerprint identification functions into a single integrated detection substrate. The detection substrate includes both a brightness detection unit with photoelectric conversion layer and a fingerprint identification unit with sensor electrodes, merging two separate functions into one unified structure that reduces overall device complexity while maintaining both functionalities.
Solution Approach 2:
The detection substrate serves multiple functions simultaneously: it performs brightness compensation by detecting light emission from the OLED and fingerprint identification by sensing capacitance changes on the finger surface. This multi-functional design eliminates the need for separate structures, improving adaptability while reducing device complexity.
2Adaptability or versatility
If separate structures are used for brightness compensation and fingerprint identification, then both functions can be implemented, but the aperture ratio is reduced due to additional components
Solution Approach 1:
The patent combines brightness compensation and fingerprint identification functions into a single integrated detection substrate. The detection substrate includes both a brightness detection unit with photoelectric conversion layer and a fingerprint identification unit with sensor electrodes, merging two separate functions into one unified structure that reduces overall device complexity while maintaining both functionalities.
Solution Approach 2:
The patent utilizes the vertical dimension by stacking the photoelectric conversion layer and sensor electrodes in different layers of the detection substrate. This layered structure allows both brightness detection and fingerprint sensing to occur simultaneously without occupying the same physical space, thereby maintaining a high aperture ratio while integrating multiple functions.
3Adaptability or versatility
If the detection substrate integrates both brightness detection and fingerprint identification devices, then multiple functions are achieved, but the manufacturing process becomes more difficult
Solution Approach 1:
The detection substrate is segmented into distinct functional units: a brightness detection unit with photoelectric conversion layer and a fingerprint identification unit with sensor electrodes. Each unit has its own specific structure and material requirements, allowing for specialized manufacturing processes for each function while maintaining overall integration. This segmentation simplifies the manufacturing process by enabling modular fabrication approaches.
Solution Approach 2:
Different regions of the detection substrate have different local properties optimized for their specific functions. The photoelectric conversion layer is designed with specific material composition for light detection, while the sensor electrodes are configured for capacitance sensing. This local optimization allows each function to be manufactured using appropriate techniques without compromising the other function's 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
This solution enables real-time brightness compensation and fingerprint identification, enhancing the display panel's performance by reducing thickness and maintaining aperture ratio while integrating multiple functions, thus improving the overall display quality and user experience.
Implementation Method 1
each of the at least one device pair for fingerprint identification-brightness detection includes a fingerprint identification device, an insulating layer and a brightness detection device which are sequentially stacked on the first base... the fingerprint identification device includes a PN junction, and the brightness detection device includes a PN junction... the fingerprint identification device includes a PIN junction, and the brightness detection device includes a PIN junction
Data Source
AI summary
A detection substrate, a display panel and a display apparatus are provided in the disclosure. The detection substrate includes a first substrate and at least one device pair for fingerprint identification-brightness detection on the first substrate. Each of the at least one device pair for fingerprint identification-brightness detection includes a fingerprint identification device, an insulating layer and a brightness detection device which are sequentially stacked on the first base.