Image projector with reflected light tracking

A device for scanned image projection, comprising:

• a light projection device that is arranged to project a light beam by projecting light on a projection surface to form a plurality of spots on the projection surface;
• a location detector that is arranged to detect a location of a spot formed by the light beam on the projection surface, and to provide location information based on the detected location;
• and
• a processor that is configured to predict a subsequent position of the light beam on the projection surface based, at least in part, on the location information;
• and further configured to control the intensity of each color component of the light beam based on the predicted subsequent position, wherein the processor that is configured to control an intensity of each color component of the projected light such that a predetermined image is rendered on the projection surface, including controlling the intensity of each color component of the projected light such that a serial order of the plurality of spots is determined based on a sweep path of the projected light, wherein the sweep path of the projected light is not predetermined.

A device for scanned image projection, comprising:

• a light projection device that is arranged to project a light beam by projecting light on a projection surface to form a plurality of spots on the projection surface;
• a location detector that is arranged to detect a location of a spot formed by the light beam on the projection surface, and to provide location information based on the detected location;
• and
• a processor that is configured to predict a subsequent position of the light beam on the projection surface based, at least in part, on the location information;
• and further configured to control the intensity of each color component of the light beam based on the predicted subsequent position, wherein the processor is configured to control an intensity of each color component of the projected light such that a predetermined image is rendered on the projection surface, including controlling the intensity of each color component of the projected light such that a serial order of the plurality of spots is determined based on a sweep path of the projected light, wherein the sweep path of the projected light is a pseudo-random trajectory.

A method for scanned image projection, comprising:

• generating an image on a projection screen by projecting a light beam on the projection surface;
• projecting a tracer beam on the projection surface;
• detecting a location of the light beam on the projection surface by detecting a reflection of the tracer beam;
• receiving location information that includes a set of coordinates that define the location of the spot relative to the projection screen;
• predicting a subsequent position of the light beam on the projection surface by determining a scanline trajectory of the light beam on the projection surface based, at least in part, on the location information;
• and
• controlling the generation of the image by controlling an intensity of each color component of the light beam based on the predicted subsequent position.

An article of manufacture including a processor-readable medium having processor-executable code encoded therein, which when executed by one or more processors, enables actions for scanned image projection, comprising:

• receiving location information that is based on a detected location of a spot formed by a light beam on a projection surface, wherein the detected location includes a set of coordinates that define the location of the spot relative to the projection screen;
• predicting a subsequent position of the light beam on the projection surface by determining a scanline trajectory of the light beam on the projection surface based, at least in part, on the location information;
• and
• controlling generation of an image on the projection screen by controlling an intensity of each color component of the light beam based on the predicted subsequent position.