Patent ID: 8094119

Claim:
A display apparatus comprising: a liquid crystal panel including a plurality of pixels arranged in a matrix-like manner; a backlight including at least one light source which applies light to the liquid crystal panel, the backlight adjusting the light emitted from the at least one light source; a computation unit configured to compute a luminance modulation factor of the at least one light source based on an image signal corresponding to each of the pixels; a first control unit configured to control the backlight based on the computed luminance modulation factor; an estimation unit configured to estimate an estimated value for each position on an intensity distribution of light applied by the backlight to the liquid crystal panel, based on the computed luminance modulation factor; a correction unit configured to correct an image signal transmittance of each pixel based on the image signal and the estimated value; and a second control unit configured to control the liquid crystal panel to set the image signal transmittance equal to the corrected light transmittance, wherein using the liquid crystal panel as the illumination target, the estimation unit includes: a first computing unit configured to compute, at each of positions on the illumination target, a plurality of first products of first reference values for light sources and luminance modulation factors for the light sources, and a first sum of the first products corresponding to the light sources, and to estimate, at each of the positions, the first sum as a first component at each of the positions, each of the first reference values being obtained referring to a first distribution having a first width and included in a larger distribution that is included in illumination intensity distributions of the light sources, and has spatially different components and a second width, a center of the first width coinciding with a center of the second width, the first width being not more than the second width; a second computing unit configured to compute a second sum of the luminance modulation factors for all of the light sources, and a second product of the second sum and second reference value, and to estimate, at each of the positions, the second product as a second component at each of the positions, the second reference value being obtained referring to a second distribution that is included in the illumination intensity distributions of the light sources, and has a spatially constant value; and a third computing unit configured to compute, at each of the positions, a third sum of the first component and the second component, and to set the third sum as the estimated value.