Patent ID: 8425048

Claim:
A projector system, comprising: a first light emitting element that emits light of a first color; a second light emitting element that emits light of a second color; a third light emitting element that emits light of a third color; a controller configured to produce first, second and third pixel data in dependence on a video signal received from a video source; a driver configured to drive the first, second and third light emitting elements in dependence on the first, second and third pixel data produced by the controller; one or more micro-mirror(s) that project an image in dependence on light beams produced in dependence on the light of the first, second and third colors emitted by the first, second and third light emitting elements; and an opto-electronics circuit including a plurality of electrically isolated photodetector (PD) segments; and circuitry configured to control how currents indicative of light detected by the plurality of electrically isolated PD segments are arithmetically combined; wherein the controller is also configured to detect vertical and/or horizontal light beam misalignment(s) in dependence on signals produced by the opto-electronics circuit, and compensate for detected vertical and/or horizontal light beam misalignment(s); wherein each of the plurality of electrically isolated PD segments produces a corresponding current indicative an amount of light detected by the PD segment; wherein the circuitry, configured to control how currents indicative of light detected by the plurality of electrically isolated PD segments are arithmetically combined, comprises switches, trans-impedance amplifiers (TIAs), and summing circuitry; wherein when the switches are in a first configuration, a signal produced by the opto-electronics circuit is used by the controller to detect vertical light beam misalignment; and wherein when the switches are in a second configuration, a signal produced by the opto-electronics circuit is used by the controller to detect horizontal light beam misalignment.