Patent ID: 11921955
Assignee: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 15:
16. A method of sensing, by using a light emitting element emitting optical radiation and transmitting the optical radiation through a translucent window, proximity to an outer surface of a translucent window, the method comprising:
providing a sense signal which is indicative for a portion of the optical radiation emitted by the light emitting element, and reflected by a human finger through the translucent window;
wherein the sense signal comprises:
a first signal component indicative of a red spectral component of the portion of the optical radiation, and
a second signal component indicative of a green spectral component of the portion of the optical radiation; and

wherein the method further comprises:
determining a first value of the first signal component and a second value of the second signal component relative to a respective nominal value;
computing a ratio between the first value and the second value; and
providing, based on the ratio, an estimate of a pressure exerted by the human finger on the outer surface.