Under-screen Fingerprint Sensor on Support Plate
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Solution Overview
Problem
Current under-screen fingerprint identification technologies face challenges in complexity and damage risk during implementation, and require high precision in mass production, making them difficult and costly to produce.
Innovation Solution
A fingerprint sensor chip is mounted on a support plate connected to the middle frame of an electronic device, allowing for various fixation methods without direct attachment to the display screen, simplifying the process and reducing precision requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical fingerprint identification module is attached under the OLED display screen, then under-screen fingerprint identification is achieved, but the procedure becomes complicated and difficult, and the OLED display screen is easily damaged
Solution Approach 1:
The patent separates the fingerprint identification module from the display screen assembly. The fingerprint sensor is mounted on a separate support plate that is independently installed into the housing, rather than being integrated under the OLED display screen. This segmentation simplifies the implementation procedure and eliminates the risk of damaging the delicate OLED during installation.
2Reliability
If the display screen and fingerprint identification module are prepared together, then under-screen fingerprint identification is achieved, but very high precision is required during mass production, and general processing technology cannot meet actual needs
Solution Approach 1:
The patent divides the assembly into separate components: the display screen assembly and the fingerprint identification module assembly. This allows each component to be manufactured and tested independently with standard precision requirements, rather than requiring high-precision integration of both components together during mass production.
Solution Approach 2:
The patent introduces a support plate as an intermediary component between the fingerprint sensor and the housing. This support plate provides a stable mounting platform with pre-defined positioning features, serving as a mediator that eliminates the need for high-precision direct mounting of the optical module to the display screen assembly.
3Reliability
If the fingerprint sensor chip is directly fixed to the display screen, then under-screen fingerprint identification is achieved, but the process becomes complicated and precision requirements increase
Solution Approach 1:
The patent introduces a support plate as an intermediary component between the fingerprint sensor chip and the display screen assembly. This support plate provides a stable mounting platform with pre-defined positioning features, simplifying the assembly process by eliminating the need for complex direct mounting procedures and high-precision alignment.
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 approach enables a simpler and more convenient under-screen fingerprint identification method, reducing production complexity and costs while maintaining stability and performance.
Implementation Method 1
OLED display screen, wherein a fingerprint sensor chip is disposed under the OLED display screen
Implementation Method 2
receive light reflected or scattered from a finger to obtain fingerprint information of the finger
Implementation Method 3
receive light reflected or scattered from a finger to obtain fingerprint information of the finger
Data Source
Figure 1A~1B
Figure 2~3
Figure 4
AI summary
Provided are a fingerprint identification apparatus and an electronic device, and the fingerprint identification apparatus is applied to an electronic device having a display screen. The fingerprint identification apparatus comprises: a support plate used to fixedly connect with a middle frame of the electronic device; and at least one fingerprint sensor chip disposed on an upper surface of the support plate and disposed under the display screen through the support plate; wherein the at least one fingerprint sensor chip is configured to receive a fingerprint detecting signal returned by reflection or scattering via a human finger on the display screen, wherein the fingerprint detecting signal is used to detect fingerprint information of the finger.