Patent ID: 11920919
Assignee: AMS SENSORS ASIA PTE. LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A method comprising:
using a plurality of light emitting elements to produce light at a wavelength λ; and
transmitting the light produced by the plurality of light emitting elements through a display screen that includes a plurality of OLED pixels disposed at a particular pitch in a first plane, wherein the plurality of light emitting elements are disposed in a second plane parallel to the first plane, the plurality of light emitting elements being disposed at the same pitch as the plurality of OLED pixels, or at an integer multiple of the pitch of the plurality of OLED pixels, and wherein the first and second planes are separated from one another by a distance D such that d2=2*(λ)*(D)/(N), where d is the pitch of the OLED pixels, and N is a positive integer,
wherein each of the light emitting elements is arranged to illuminate a respective subset of the OLED pixels, and each of the subsets includes multiple neighboring OLED pixels, such that light from each particular one of the light emitting elements passes through different ones of the OLED pixels in the respective subset so as to produce an interference pattern so that the produced interference patterns are superimposed so as to produce a high-intensity interference pattern.