Patent ID: 7898520
Filing Date: 2011-03-01
Classification: G06T

Abstract:
1. A computer-implemented method of simulating a backlight, comprising: tracing rays to an output plane of the backlight, wherein the backlight has a film stack at the output plane and a light source; collecting information from the traced rays to produce a first database containing spatial and directional information of the rays incident on the output plane; associating a probability function with the output plane; calculating a second database containing spatial and directional information for rays exiting the output plane as a function of the probability function and the first database; identifying a plurality of components of an optical path in the film stack that are suitable for representation by respective bi-directional scattering distribution functions (BSDFs); acquiring the BSDFs of the components; calculating a BSDF of the film stack from the component BSDFs, the film stack BSDF being the probability function associated with the output plane; and acquiring a mathematical description of the light source; wherein the tracing step traces rays from the light source according to the mathematical description thereof to the output plane; and wherein the second database represents radiance as a function of location on the output plane.