A chromaticity testing device of a CRT phosphor screen is provided, which enables the on-line automatic testing. A supporting member is provided for supporting a face panel of a color CRT having a phosphor screen therein. A light source emits UV light toward the phosphor screen placed on the member. A movable sensor unit senses visible light emitted from a position of the phosphor screen due to the illuminated UV light and outputs chromaticity signals for the red, green and blue components of th...

Apparatus and a method for combining radiant energy of substantially distinct spectral bands to produce a light source having predetermined color temperature or chromaticity characteristics. The apparatus includes a generating source that generates emissions of radiant energy from at least two spatial emission regions. Each of the spatial emission regions emits radiant energy in a substantially distinct spectral band. The apparatus further includes an optical directing system that directs a subs...

The invention discloses an organic electroluminescent device having an anode, a cathode and a plurality of organic compound layers provided between the anode and the cathode and including a light-emitting layer, wherein the light-emitting layer contains two light-emitting materials including a phosphorescent light-emitting material, and a host material; and when three or more organic compound layers are provided between the light-emitting layer and the anode, and when the ionization potential of...

Apparatus and a method for combining radiant energy of substantially distinct spectral bands to produce a light source having predetermined color temperature or chromaticity characteristics. The apparatus comprises a generating source that generates emissions of radiant energy from at least two spatial emission regions. Each of the spatial emission regions emits radiant energy in a substantially distinct spectral band. The apparatus further comprises an optical directing system that directs a su...

An apparatus for correcting a chromaticity diagram by a variable brightness includes: a first grid voltage controller for controlling a first grid voltage to be a voltage of a predetermined level; a first grid voltage detector for detecting the first grid voltage output by the first grid voltage controller; a phase inverter for inverting a phase of a voltage signal detected by the first grid voltage detector; an analog-to-digital converter for converting the inputted voltage signal, which has be...

The white chromaticity, in which the illumination environment is considered, is measured for each individual color monitor (100). A reference body (Q), comprising a perfect diffuser, is applied on the screen of the color monitor (100). By a test pattern display means (210), a test pattern (T) is displayed on the screen of the color monitor (100) based on tone values of the three primary colors R, G, and B that are stored in a tone value storage means (220). While fixing the tone value of the pri...

A liquid crystal panel comprising a plurality of pixels arranged in a matrix. Each pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel, and an auxiliary sub-pixel with a transflective area.

A liquid crystal panel comprising a plurality of pixels arranged in a matrix. Each pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel, and an auxiliary sub-pixel with a transflective area.

The present invention provides a method for characterizing display devices. Initially, a plurality of colors are generated on the display device. The generated colors are measured and a black point and a white point are determined. The measured colors are then corrected for the determined black point in order to obtain a plurality of chromaticity values. The chromaticity values of the corrected color values are averaged, and a tristimulus matrix is generated with the averaged chromaticity values...

Image processing includes defining chromaticity regions according to different luminance levels, and when the luminance of a pixel corresponds to one of the luminance levels, and a chromaticity vector of the pixel is within a chromaticity region corresponding to the luminance level, adjusting the chromaticity vector of the pixel.