Nowadays, consumers are focusing on the facial recognition function of smart phone screens, and are also looking forward to a new generation of ultrasonic fingerprint recognition technology under the screen. However, some experts pointed out that at this stage, the fingerprint recognition system under the screen can only function when it is built on OLED.
According to the analysis by Xu Meiwen, senior research manager of International Data Information Corporation (IDC), the fingerprint recognition technology under the ultrasonic screen cannot be used on LCD panels. It can only be used on OLED panels. The main reason is that OLED panels are self-luminous and do not need a backlight module. The backlight module of the panel may block the function of the fingerprint recognition system under the ultrasonic screen.
Xu Meiwen said that the reason why major mobile phone brands that intend to launch under-screen fingerprint recognition functions lock the OLED panel because they are optimistic that they do not need a backlight module to allow sound waves to penetrate smoothly. In the initial stage, the fingerprint recognition system under the ultrasonic screen will focus on area recognition, limited to a small area of ​​the mobile phone screen for fingerprint recognition, but in the end, it is still expected to launch a product that can recognize fingerprints on all screens.
At present, major display panel manufacturers in Taiwan are pushing MiniLED panels, hoping to compete with OLED panels. However, because MiniLED panels still require backlight modules, they may not be the choice for the development of fingerprint recognition systems under ultrasonic screens.
Xu Meiwen believes that the MicroLED panels following MiniLED do not require a backlight module, and will also be one of the panel options for the fingerprint recognition system under the ultrasonic screen. However, the MicroLED technology is not yet mature. At this stage, only OLED panels are suitable for carrying this function.
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