Abstract: A color calibrator of a display apparatus is disclosed. The color calibrator includes a color estimator for receiving a plurality of digital counts of initial colors of an image signal. The color estimator includes a first operator, a gray value electrical-optical converter, a mixed-color electrical-optical converter, an initial color electrical-optical converter, a plurality of linear transformers and a weighting operator. The gray value electrical-optical converter, the mixed-color electrical-optical converter and the initial color electrical-optical converter convert a gray value digital count, a mixed color digital count and an initial color digital count for generating a plurality conversion outputs according to a plurality of gray conversion curves, a plurality of mixed color conversion curves and a plurality of initial color converting curve. The weighting operator receives the conversion outputs and a plurality of weighting values to generate an analysis output signal.

Abstract: A color calibrator of a display apparatus is disclosed. The color calibrator includes a color estimator for receiving a plurality of digital counts of initial colors of an image signal. The color estimator includes a first operator, a gray value electrical-optical converter, a mixed-color electrical-optical converter, an initial color electrical-optical converter, a plurality of linear transformers and a weighting operator. The gray value electrical-optical converter, the mixed-color electrical-optical converter and the initial color electrical-optical converter convert a gray value digital count, a mixed color digital count and an initial color digital count for generating a plurality conversion outputs according to a plurality of gray conversion curves, a plurality of mixed color conversion curves and a plurality of initial color converting curve. The weighting operator receives the conversion outputs and a plurality of weighting values to generate an analysis output signal.

Abstract: A color correction method for liquid crystal displays (LCDs) is provided to eliminate crosstalk among color channels of the LCDs in the present invention. The color correction method includes steps of utilizing a channel-dependent Gain-Offset-Gamma (GOG) model to characterize a non-linear Electro-Optical Transfer Function (EOTF) of the LCDs in which crosstalk among color channels exists, converting the non-linear EOTF into a device-independent linear EOTF and modifying the linear EOTF to a target EOTF, so as to make the LCDs have expected colorimetry.

Abstract: An adaptor assembly makes it possible to mount an electric fixture, such as a ceiling fan or electric lighting fixture, to a ceiling with a slope greater than 32.degree.. The adaptor assembly includes a slope angle extension cover formed as a truncated conical surface with a bottom end lying in a first plane adapted for attachment to a standard fixture canopy and a top end lying in a second plane at an angle of 26.degree. to the first plane and adapted to be attached through an adaptor mounting plate to a junction box mounted in a recess in the ceiling.The mounting plate has a plurality of radial slots and is rotated to bring a pair of slots in alignment with screw holes in mounting lugs on the junction box for attachment with screws. The mounting plate has a pair of deformations providing flat wall portions which, when the mounting plate is installed are in parallel to the bottom end of the extension cover.