Patent ID: 9692508
Date: 2017-06-27
CPC Classifications: H04B,H04L,H04N

Claim:
1. A method for providing directional optical communications, comprising selecting at least one pixel from an array of pixels provided by an image projecting device in a projection display system for emitting light towards a target area of a receiving device, wherein the selecting comprises iteratively reducing the number of light emitting pixels of the array of pixels; emitting light by the selected at least one pixel towards the target area; and a) dividing the array of pixels into sub-arrays, b) switching off pixels of a sub-array and emitting light by pixels of another sub-array, c) determining that the receiving device receives light emitted by the pixels of the light emitting array, d) dividing the light emitting sub-array into further sub-arrays, and repeating steps b) to d) until the target area of the receiving device is determined.