Fingerprint sensor at the bottom of the screen It has become the norm in Android, especially in the latter and in the highest premium range. Or so far it's something limited to OLED and AMOLED panels, which are the most expensive and widely used in the premium segment of the market. It has l ong been sought to bring this again to LCD panels.
LCD panels are cheap and widely used in mid-range on Android. Many models work to insert finger sensors under the LCD panel and something seems to have achieved it. Redmi was the first of these
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Fingerprint sensor under the LCD panel
The finger-operated sensor at the bottom of the screen it needs light to illuminate the fingers and analyze it. In the OLED panel it is possible to illuminate a specific area, since in this type of panels it is possible that the brake light from the fingerprint through the panel illuminates the sensor. But in the case of the LCD it is not possible, which is why these models use fingerprints on either side or back.
Redmi was investigating that he might have taken a fingerprint sensor on the LCD panel and it seemed he had found his way. Product they used a high quality film delivered by the bed, which will be placed at the bottom of the screen. It will emit infrared light, which then reaches the fingerprints, bends into it and penetrates the screen, and flashes to the fingerprint sensor.
This product technology seemed to work well, as the CEO of Redmi has pointed out to your profile on Weibo. Due to the temporary exposure this forecasts, it is speculated that the Redmi K30 Pro could be the first model using an LCD panel with a fingerprint sensor at the bottom of the screen or one of the new mid-range on the Redmi Note.
Lu Weibing, CEO of Redmi, made that clear Ideal for mass production, suggesting that we will soon have a specific product model with this fingerprint at the bottom of the screen in the LCD folder. Hopefully soon there will be more details on what phone might be.
