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

Claim 10:
11. An optical fingerprint sensing module, comprising:
an image sensing device;
a light shielding structure surrounding the image sensing device, wherein the light shielding structure has an opening exposing the image sensing device;
at least one light source positioned out of the light shielding structure such that the light shielding structure is located between the light source and the image sensing device; and
a field angle controller adjacent to the light source and 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 in a direction perpendicular to the light emitting plane and disposed above the light source, a width of the aperture is smaller than a width of a 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.