The fingerprint recognition technology has rapidly advanced in the past few years and now we are getting smartphones with a fingerprint sensor embedded under the phone’s display.
One of the limitations with the in-display fingerprint sensor is that it works at a specific point on the display, although the technology has advanced and the fingerprint recognition area also keeps on increasing with a newer version of the technology.
Now, China-based Tianma Microelectronics has developed a multi-point in-display fingerprint recognition solution that can be used to unlock the full-screen smartphone through multiple points over the display.
The company says that it is an in-house technology where the image processing component of this new in-display sensing solution is embedded in a TFT display substrate, enabling the functionalities of touch, display, and fingerprint sensing simultaneously.
Further, Tianma claims to have used optical path design for this in-display technology which reduces the thickness of the module by about 50 percent compared to other types of optical fingerprint solutions.
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It’s noteworthy that the multi-point fingerprint recognition solution is for the LCD screens, which is a welcome move. So far, the technology of the under-display fingerprint sensor has been limited to OLED panels as their thinness allows light to pass through easier.
Recently, TCL’s China Star Optoelectronics Technology Co., Ltd (CSOT) also announced its new in-display fingerprint technology for LCD screens called “Full-Screen Single-Point In-Display Fingerprint Technology.” It is claimed to cover around 92% area of the screen, which practically means that you can put your finger anywhere on the display to unlock.
So far, there’s no commercially available smartphone that comes with an in-display fingerprint sensor on an LCD display. However, with the technology from the likes of Tianma and CSOT planned to go into mass production this year, that could change soon.
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