3617 results about "Electrophoreses" patented technology

<heading lvl="0">Abstract of Disclosure</heading> This invention relates to an electrophoretic display or a liquid crystal display and novel processes for its manufacture. The electrophoretic display (EPD) of the present invention comprises microcups of well-defined shape, size and aspect ratio and the microcups are filled with charged pigment particles dispersed in an optically contrasting dielectric solvent. The liquid crystal display (LCD) of this invention comprises well-defined microcups filled with at least a liquid crystal composition having its ordinary refractive index matched to that of the isotropic cup material. A novel roll-to-roll process and apparatus of the invention permits the display manufacture to be carried out continuously by a synchronized photo-lithographic process. The synchronized roll-to-roll process and apparatus permits a pre-patterned photomask, formed as a continuous loop, to be rolled in a synchronized motion in close parallel alignment to a web which has been pre-coated with a radiation sensitive material, so as to maintain image alignment during exposure to a radiation source. The radiation sensitive material may be a radiation curable material, in which the exposed and cured portions form the microcup structure. In an additional process step, the radiation sensitive material may be a positively working photoresist which temporarily seals the microcups. Exposure of a selected subset of the microcups via the photomask image permits selective re-opening, filling and sealing of the microcup subset. Repetition with additional colors permits the continuous assembly of a multicolor EPD or LCD display.

An electrophoretic display device includes unit cells each containing i) two sets of display electrodes and a collection electrode and ii) two kinds of translucent colored electrophoretic particles having charge polarities different from each other. The unit cells are constructed so that the two display electrodes are superimposingly disposed to display the stated display color by the principle of subtractive mixture of color stimuli of the colored electrophoretic particles present on the display electrodes. Three unit cells are adjacently disposed in a same plane to form a pixel, and combinations of colors of the two kinds of translucent colored electrophoretic particles in each of the three unit cells forming the pixel are respectively one of the three primary colors and a color which provides black by subtractive mixture with one of the three primary colors.

Methods and compositions are provided for detecting single nucleotide polymorphisms using a pair of oligonucleotides, a primer and a snp detection sequence, where the snp detection sequence hybridizes to the target DNA downstream from the primer and in the direction of primer extension. The snp detection sequence is characterized by having a nucleotide complementary to the snp and adjacent nucleotide complementary to adjacent nucleotides in the target and an electophoretic tag bonded to the 5'-nucleotide. The pair of oligonucleotides is combined with the target DNA under primer extension conditions, where the polymerase has 5'-3' exonuclease activity. When the snp is present, the electophoretic tag is released from the snp detection sequence, and can be detected by electrophoresis as indicative of the presence of the snp in the target DNA.

A method of depositing diamond particles on a surface of a substrate is provided. The method is effected by (a) charging the diamond particles by a positive charge to obtain positively charged diamond particles; and (b) electrophoretically depositing the positively charged diamond particles on the surface of the substrate, for obtaining a green diamond particles coat on the surface of the substrate.

A drive circuit for an electrophoretic matrix display comprises a select driver (16) for selecting lines of pixels (18) of the matrix display. A data driver (10) supplies drive voltage waveforms (VD) to each one of the selected pixels (18) via data electrodes (5, 5′). A controller (15) controls the select driver (16) to select a group of lines of pixels (18) at a same time during portions of the drive voltage waveforms (VD) which for each of the data electrodes (5, 5′) are equal for at least all the pixels (18) which are associated with the same one of the data electrodes (5, 5′).