Xiaomi has successfully filed a patent for a full-screen fingerprint scanner
Since 2018, the under-display fingerprint scanner has been one of the exciting features of flagship smartphones. But this technology has not been developed for some time because it is very difficult to innovate in the fingerprint scanner.
According to GizmoChina, by one of the insiders of China’s national patent database, it was revealed that Xiaomi has designed a new fingerprint scanning technology patent that allows the user Use this sensor in any part of the screen. This is great news for the end user, as he doesn’t have to try multiple times to unlock his phone, just like he doesn’t have to place his finger precisely on the under-display fingerprint scanner.
In this In the patent, Xiaomi shows off how its new technology works, featuring an array of infrared LED light emitters underneath a capacitive touchscreen and on top of a conventional AMOLED display. The array of infrared light receivers will be placed on top of the infrared LED light emitters. All of the infrared LED light emitters and receivers mentioned above are the basic building blocks for a full-screen fingerprint scanner.
First, the user touches the screen with his finger when he wants to scan his fingerprint. At this stage, the capacitive touch screen registers the position and shape of the fingertip, then an array of infrared LED light emitters emits light from the screen only in the shape and position of the fingertip. Note that the surrounding LED light emitters will not light up in this mode.
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In the next step, the infrared light is reflected after contact with the fingertip and reaches the infrared receptors. In this step, the infrared light speed data is used to draw the contour of the fingerprint. The new information is then compared with the stored fingerprint details to verify the accuracy of the information. If matched, the user can unlock their smartphone from any part of the screen!
Huawei will patent its full-screen fingerprint technology in August 2020 in six markets, including China, Europe, the United States , Japan, Korea and India. However, this technology has not yet been introduced by the mentioned company and one of the reasons can be assumed to be the US government’s sanctions against Huawei. We hope that Xiaomi can release this technology to the smartphone market soon.