Under-Display Optical Fingerprint Sensor

The filing for an under-display optical fingerprint sensor with NFV collimator and TFT/organic imager depicts a biometric sensor implemented in a touch-display layer and covered by a transparent layer. The invention includes a collimator layer and a pixelated image sensor. A collimator is a device that narrows or focuses a beam of particles or light. The collimator is configured to enable a one-to-one imaging ratio between the sensor area and the corresponding fingerprint image.

The under-display optical fingerprint sensor imaging system is made up of a thin-film transistor (TFT)-based organic sensor, which captures reflected light emitted by an OLED display.

The collimator layer is made up of a fiber-optic or micro-aperture plate configured to achieve a field of view with a range of plus or minus 0.5 to 10 degrees. The transmission range of the collimator layer would be roughly -6 dB to 0 dB.

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