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Redmi has successfully implemented screen fingerprints on the LCD screen

Source:China Z.com

Lu Weibing, president of Xiaomi Group China and general manager of Redmi Redmi brand, said that Redmi has successfully implemented screen fingerprints on LCD screens.

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Lu Weibing said that the Redmi R & D team implemented screen fingerprints on LCD screens and had mass productivity. 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 emitter below the screen emits infrared light. After the fingerprint is reflected, it penetrates the screen and hits the fingerprint sensor to complete the fingerprint verification, which solves the LCD screen fingerprint problem.

The working principle of Lu Weibing's LCD screen fingerprints:

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.

But because the fingerprint sensor is below the screen, there needs to be a channel to transmit optical or ultrasonic signals, which currently can only be implemented on OLED screens. The LCD screen is always blocked by the backlight module, so it is impossible to enjoy this visible unlocking method.

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, enabling on-screen fingerprints on LCD screens with mass production.

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 emitter below the screen emits infrared light. After the fingerprint is reflected, it penetrates the screen and hits the fingerprint sensor to complete the fingerprint verification, which solves the LCD screen fingerprint problem.

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Lu Weibing said that the Redmi R & D team has overcome the difficulty of using screen fingerprints on LCD screens before, and said that the technology has mass productivity.

At present, mobile phones supporting screen fingerprint technology in the market have light sensors or ultrasonic sensors located below the screen, which results in that they can only be implemented on OLED screens. The LCD screen has been unable to use screen fingerprints due to the obstruction of the backlight module.

This time the Redmi R & D team has tackled this issue. Whether the future LCD screen fingerprint experience can be comparable to OLED screen fingerprints, let us wait and see.


Post time: Apr-01-2020