Display device high dynamic contrast ratio.

A display comprising: a first means (12, 16) comprising a light source (12) and the plurality of controllable elements (44) to provide spatially modulated light in a first spatial resolution; an optical system (17, 27); a second means comprising a plurality of controllable elements (42) for further spatially modulating the light (20, 26, 34); and a controller for applying control signals (38A, 38B) to the controllable elements of the first means (12, 16) and second means (20, 26, 34); characterized in that: the optical system (17, 27) projecting each controllable element (44) in one of the first and second means (16) on a plurality of controllable elements (42) in the other of the first and second means (20, 26 , 3. 4); and the controller is configured to provide a first control signal (38A) to control the controllable elements (44) of the first means to provide an approximation to the desired image and to provide a second control signal (38B) to control the controllable elements (42) the second means to correct the approximation of the desired image.