Under-screen Fingerprint Support Plate for OLED Integrity
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Solution Overview
Problem
The existing under-screen fingerprint identification technologies face challenges due to the fragility and high cost of OLED screens, leading to increased complexity and maintenance issues when attaching and detaching fingerprint identification modules, which complicates the process and raises costs.
Innovation Solution
A fingerprint identification apparatus with a support plate and fingerprint sensor chip configuration that allows for under-screen fingerprint detection, using an optical path design with collimating units or lenses to improve image resolution and reduce the risk of damage to the OLED screen, while maintaining a compact and efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint identification module is directly attached to the OLED screen, then the fingerprint identification function is achieved, but the OLED screen is easily damaged and the attaching process becomes complicated
Solution Approach 1:
The patent introduces a separate support plate as an intermediary component between the fingerprint identification module and the OLED screen. The support plate has a window structure that allows optical signals to pass through while providing a stable mounting surface for the fingerprint module, thereby avoiding direct attachment to the fragile OLED screen and simplifying the attaching process
Solution Approach 2:
The patent divides the assembly into separate functional components: the OLED screen, the support plate with window, and the fingerprint identification module. This segmentation allows each component to be optimized independently and facilitates easier assembly and disassembly without damaging the OLED screen
2Measurement precision
If the fingerprint identification module is completely adhered to the OLED screen, then the fingerprint identification accuracy is improved, but the OLED screen is easily damaged when the module is disassembled
Solution Approach 1:
The support plate serves as a mediator that enables close positioning of the fingerprint module to the OLED screen for accurate fingerprint detection, while simultaneously providing a detachable mounting interface that allows easy disassembly and repair without damaging the OLED screen
3Measurement precision
If the optical fingerprint identification module is used with collimating units or lenses, then the image resolution is improved, but the device complexity increases
Solution Approach 1:
The patent applies collimating units or lenses only in the specific region where optical signals pass through the support plate window, rather than throughout the entire device. This localized application improves image resolution at the critical detection point while minimizing the overall increase in device complexity
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 enhances the maintainability and reduces costs by allowing for secure and efficient attachment of the fingerprint module under the OLED screen, improving fingerprint identification accuracy and user experience without compromising the screen's integrity.
Implementation Method 1
receive an optical signal formed by light emitted by the OLED screen and reflected by a finger
Implementation Method 2
using an optical path design with collimating units or lenses to improve image resolution
Data Source
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AI summary
Provided are a fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus is applied to an electronic device having a display screen, and includes: at least one fingerprint sensor chip; and a support plate provided with a first opening window, where the at least one fingerprint sensor chip is fixedly disposed in the first opening window. In an embodiment of the present application, the at least one fingerprint sensor chip is disposed in the first opening window of the support plate, which could reduce costs and complexity of the electronic device, and improve maintainability. Especially, in a scenario of a plurality of fingerprint sensor chips, the costs and complexity of the electronic device could be effectively reduced, and maintainability is greatly improved. In addition, a thickness of the fingerprint identification apparatus could be effectively reduced.