Optical fingerprint identification system and optical fingerprint identification device

An optical fingerprint identification device, comprising:

• a plurality of light emitting elements, wherein the plurality of light emitting elements are disposed at equal intervals respectively in a first direction and a second direction, and the first direction is substantially perpendicular to the second direction;
• a plurality of light path adjusting elements, wherein the plurality of light path adjusting elements are located above the plurality of light emitting elements in a stack direction of the optical fingerprint identification device, the stack direction is substantially perpendicular to the first direction and the second direction, the plurality of light path adjusting elements are disposed at equal intervals in the first direction, and each of the plurality of light path adjusting elements is located between two adjacent light emitting elements of the plurality of light emitting elements in the first direction;
• a plurality of photo sensors, wherein the plurality of photo sensors are located below the plurality of light emitting elements in the stack direction, the plurality of photo sensors are disposed at equal intervals in the first direction, and each of the plurality of photo sensors is located between two adjacent light emitting elements of the plurality of light emitting elements in the first direction;
• and
• a plurality of light collecting elements, wherein the plurality of light collecting elements are disposed between the plurality of photo sensors and the plurality of light emitting elements;
• wherein the optical fingerprint identification device further comprises a light interference filter layer and a light absorption filter layer that are disposed above the plurality of photo sensors and below the plurality of light path adjusting elements, the light interference filter layer is configured to provide a filter bandwidth shift according to a change of an incident light angle thereon, the light absorption filter layer is a light passable filter layer, and the light absorption filter layer has a light passable bandwidth ranging between visible and near-infrared spectrum;
• wherein the light passable bandwidth through the light interference filter layer and the light absorption filter layer includes near-infrared spectral range;
• wherein the plurality of photo sensors, the plurality of light collecting elements, the plurality of light emitting elements and the plurality of light path adjusting elements are sequentially disposed along the stack direction of the optical fingerprint identification device;
• wherein each of the plurality of light emitting elements and corresponding one of the plurality of photo sensors are physically and electrically connected via a thin-film-transistor circuitry structure;
• wherein a full width at half maximum of a bandwidth of light passing through the light interference filter layer and the light absorption filter layer is FWHM, and the following condition is satisfied:
• FWHM<100 [nm].