With the continuous development of technology, fingerprint recognition technology has become the standard configuration of electronic devices such as smartphones. Among them, optical under-screen fingerprint and under-screen fingerprint are two common fingerprint recognition technologies. Although they can both realize the fingerprint recognition function, there are certain differences in terms of working principle and technical characteristics. This article will provide an in-depth comparison of these two fingerprint recognition technologies to help readers better understand their differences.
First, the working principle.
Optical under-display fingerprint.
Optical under-display fingerprint technology mainly collects fingerprint information through optical sensors. When the user taps their finger to a specified location on the screen, the optical sensor captures the ridge and valley lines of the fingerprint and converts it into a digital signal. Subsequently, the fingerprint information is compared and identified through the algorithm to achieve identity authentication.
Under-display fingerprint. The under-display fingerprint technology integrates the fingerprint recognition sensor under the screen. This technology is mainly divided into two types: ultrasonic under-screen fingerprint and capacitive under-screen fingerprint. When the user places their finger on a designated area of the screen, the sensor senses subtle changes in the fingerprint and obtains the fingerprint information. Similar to optical under-display fingerprints, under-display fingerprint technology also requires algorithms to compare and identify fingerprint information.
Second, technical characteristics.
Optical under-display fingerprint.
1) High recognition accuracy: The optical sensor has high resolution and image acquisition ability, which can capture more detailed fingerprint information, thereby improving the recognition accuracy.
2) Wide range of application: Due to the strong versatility of optical sensors, optical under-screen fingerprint technology can be applied to many types of screens and terminal devices.
3) Relatively low cost: Compared with under-screen fingerprint technology, the cost of optical under-screen fingerprint technology is relatively low, which is conducive to large-scale promotion and application.
Under-display fingerprint. 1) High integration: The under-display fingerprint technology integrates the fingerprint recognition sensor under the screen, eliminating the need to open additional space on the screen, which is conducive to improving the overall aesthetics and portability of the terminal device.
2) Good user experience: Since users only need to place their fingers on the designated area of the screen to complete fingerprint unlocking, without pressing or sliding and other operations, the under-screen fingerprint technology has certain advantages in terms of user experience.
3) High security: Under-display fingerprint technology usually uses more advanced biometric algorithms and encryption technology, which can better protect the privacy and security of users.
3. Application scenarios.
Optical under-display fingerprint.
Optical under-display fingerprint technology is mainly suitable for scenarios that require recognition accuracy and cost. For example, low-end smartphones, tablets and other devices can use optical under-screen fingerprint technology to achieve fingerprint recognition function. In addition, in some occasions that require large-scale deployment of fingerprint recognition systems, such as public security, enterprise management and other fields, optical under-screen fingerprint technology also has certain application prospects.
Under-display fingerprint. The under-display fingerprint technology is more suitable for scenarios that require high overall aesthetics and user experience of the device. For example, high-end smartphones, wearables, and more can use under-display fingerprint technology to achieve a seamless fingerprint recognition experience. At the same time, in some fields with high security requirements, such as financial payment, identity verification, etc., under-display fingerprint technology can also provide higher security.
Fourth, summary. 
To sum up, although optical under-screen fingerprint and under-screen fingerprint are both fingerprint recognition technologies, there are certain differences in working principles, technical characteristics and application scenarios. Which technology to choose depends on your needs and budget. For device manufacturers and users, understanding these differences can help to better select and apply the right fingerprint recognition technology to improve device security and user experience.