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Redmi LCD Screen Fingerprint Successfully Implemented and In Mass Production

by Kamlesh Bhati
March 9, 2020
Redmi LCD Screen Fingerprint

Redmi LCD Screen Fingerprint

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Redmi LCD Screen Fingerprint

Lu Weibing, general manager of the Redmi Redmi brand, announced that Redmi successfully implemented LCD screen fingerprints on LCD screens, and stated that the technology has mass productivity.

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Redmi LCD Screen Fingerprint
Redmi LCD Screen Fingerprint

The working principle of the screen fingerprint is simply to record the characteristics of the fingerprint and feed it back to the sensor below the screen to determine whether it coincides with the user’s initial fingerprint.

Lu Weibing Demonstrated LCD Screen Fingerprint on Redmi Note 8 Pro Prototype.

Redmi LCD Screen Fingerprint Demonstration ( Redmi Note 8 Pro Prototype)

However, because the fingerprint sensor is below the screen, there needs to be a channel to transmit optical or ultrasonic signals, which results in the current implementation only on OLED screens. LCD screens can’t enjoy this visible unlocking method because of the backlight module.

At present, all LCD screen mobile phones can only use back fingerprints or side fingerprints like Redmi K30. The Redmi R&D team has now overcome this problem, realizing screen fingerprints on LCD screens and having mass productivity.

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The innovative use of infrared high-transmittance film material greatly improves the transmittance of infrared light that could not pass through the screen. The infrared transmitter at the bottom of the screen emits infrared light. After the fingerprint is reflected, it penetrates the screen and shines on the fingerprint sensor to complete the fingerprint verification, which solves the LCD Screen Fingerprint problem.

This way, the fingerprints on the screen can benefit more consumers. In future, devices with screen fingerprint can be expected near 10,000₹ INR price range. I believe this is the reason why redmi actively follows up. I don’t know if this will make the physical fingerprint completely disappear.

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