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183 results about "Change colour" patented technology

System and Method for Providing a Wide Aspect Ratio Flat Panel Display Monitor Independent White-Balance Adjustment and Gamma Correction Capabilities

A system and method are described herein for controlling the white balance and providing gamma correction without compromising gray-scale dynamic range in a flat panel liquid crystal display (LCD). According to one embodiment of the present invention, the flat panel LCD includes electronic circuitry for coupling to a host computer to receive a white-balance adjustment control signal, and electronic circuitry for receiving image data to be rendered on the flat panel LCD. Further, the flat panel LCD of one embodiment is configured for coupling to a color-sensing device to receive optical characteristics data of the flat panel LCD detected by the color-sensing device. The white balance adjustment mechanisms include the provision of two or more light sources of differing color temperature, whose brightness can be independently varied (and distributed through a light distribution mechanism) to adjust color temperature without altering the grayscale resolution of the RGB colors. The present invention further includes white balance adjustment software and gamma correction software for generating white-balance adjustment control signals and appropriate gamma correction curves.
Owner:RPX CORP

Vapochromic LED

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum (mumax=545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing / emitting layer formed on the hole transport layer, the sensing / emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing / emitting layer and at least the first electrode comprises an optically transparent material.
Owner:RGT UNIV OF MINNESOTA

End of service and residual life indicator

An End of Service Life (ESLI) and Residual Life Indicator (RLI), for gas masks and other filters. The indicator includes a solid conduit with one end closed by a transparent material and the other by a porous material which allows gas to permeate through it. In one implementation of the ESLI, a fine powder that can react chromogenically is placed in the conduit. The powder is free to move in the conduit, but it cannot escape. The porous end of the conduit is inserted into the filter to the desired depth. When a target gas reaches the porous end, it enters the conduit, reacts chromogenically with the powder and changes color. The powder can be viewed through the conduit by tilting the filter to cause the powder to gravitate into the transparent end. A color chart is attached to the filter near the transparent end to facilitate a determination of whether the chromogenic powder has undergone a color change or not. In another implementation of the indicator, the porous material includes a reagent that can react with the target gas and release a reactive gas. The transparent end of the conduit is coated internally with a chromogenic reagent that changes its color when either the target gas or the gas produced in the reaction reaches it. The ESLI/RLI may be inserted into the filter from different directions to accommodate practical filter or mask designs. Two or more ESLI/RLI may be inserted into the filter from different directions to alert the user to different levels of filter consumption. The ESLI/RLI may contain more than one chromophore to alert users of the penetration of different gases or classes of gases.
Owner:ATTAR AMIR J
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