Patent ID: 8199401

Claim:
A display comprising: a light source comprising a two-dimensional array of light-emitting elements each having a controllable light output and the controller is configured to generate driving values for the light-emitting elements based at least in part on image data to display an image specified by the image data; a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source, each of the plurality of controllable elements having a controllable transmissivity; an intermediate spatial light modulator comprising a plurality of controllable elements, located in a light path between the light source and the spatial light modulator, each of the plurality of controllable elements of the intermediate spatial light modulator having a controllable transmissivity, the intermediate spatial light modulator characterized by a maximum transmissivity of at least ½; and a controller configured: to control the controllable elements of the spatial light modulator and the controllable elements of the intermediate spatial light modulator in to response the image data to display an image specified by the image data, and to estimate first light intensities at the controllable elements of the intermediate spatial light modulator based on the driving values for the light-emitting elements.