Patent ID: 11906713
Assignee: NOVATEK MICROELECTRONICS CORP.
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. An optical fingerprint sensing module, comprising:
an image sensing device configured to sense light transmitted from a fingerprint on a display panel and comprising a light sensing plane having a first geometric center;
at least one light source adjacent to the image sensing device, wherein the light source comprises a light emitting plane having a second geometric center, and the first geometric center is separated from the second geometric center by a distance ranged from 2 mm to 20 mm;
a light shielding structure disposed between the image sensing device and the light source; and
a field angle controller cooperated with the light source such that light emitted from the light source or passing through the field angle controller has a field angle ranged from 5 degrees to 60 degrees, wherein the field angle controller comprises a top plate extending laterally from a top of the light shielding structure and a wall extending downwards from the top plate, the top plate has an aperture aligned with the light emitting plane and disposed above the light source, a width of the aperture is smaller than a width of the light emitting plane of the light source, the light source is positioned between the wall and the light shielding structure, and the wall surrounds the light shielding structure and the light source.