摘要:
Electrofluidic devices, visual displays formed from the electrofluidic devices, and methods for making and operating such electrofluidic devices Each electrofluidic device has a fluid vessel with first and second regions that contain an electrically conductive polar fluid and a non-polar fluid The polar and/or the non-polar fluids are externally visible external through a viewable area of the second region A voltage source is electrically connected to a capacitor having a hydrophobic surface that contacts the polar fluid and provides a first principal radius of curvature of the polar fluid that is convex and smaller than a second principal radius of curvature of the polar fluid in the first region The voltage source applies an electromechanical force to the polar fluid, thereby transferring the polar fluid from the first region to the second region and causing a spectral property of light transferred through the viewable area to change.
摘要:
Electrofluidic devices, visual displays formed from the electrofluidic devices, and methods for making and operating such electrofluidic devices Each electrofluidic device has a fluid vessel with first and second regions that contain an electrically conductive polar fluid and a non-polar fluid The polar and/or the non-polar fluids are externally visible external through a viewable area of the second region A voltage source is electrically connected to a capacitor having a hydrophobic surface that contacts the polar fluid and provides a first principal radius of curvature of the polar fluid that is convex and smaller than a second principal radius of curvature of the polar fluid in the first region The voltage source applies an electromechanical force to the polar fluid, thereby transferring the polar fluid from the first region to the second region and causing a spectral property of light transferred through the viewable area to change
摘要:
Colored fluids for electrowetting, electro fluidic, or electrophoretic devices, and the devices themselves, are disclosed. The colored fluid can include a nonaqueous polar solvent having (a) a dynamic viscosity of 0.1 cP to 50 cP at 250 C, (b) a surface tension of 25 dynes/cm to 55 dynes/cm at 250 C, and (c) an electrowetting relative response of 40% to 80%. Such colored fluids further include a colorant selected from a pigment and/or a dye. In another embodiment, the colored fluid can include a non-polar solvent and an organic colorant selected from a pigment and/or a dye. Such colored fluids can be black in color and have a conductivity from 0 pS/cm to 5 pS/cm and a dielectric constant less than 3. The use of the colored fluids offers improvements in reliability, higher levels of chroma in the dispersed state, and the ability to achieve higher contrast ratios in display technologies.
摘要:
Colored fluids for electrowetting, electro fluidic, or electrophoretic devices, and the devices themselves, are disclosed. The colored fluid can include a nonaqueous polar solvent having (a) a dynamic viscosity of 0.1 cP to 50 cP at 250 C, (b) a surface tension of 25 dynes/cm to 55 dynes/cm at 250 C, and (c) an electrowetting relative response of 40% to 80%. Such colored fluids further include a colorant selected from a pigment and/or a dye. In another embodiment, the colored fluid can include a non-polar solvent and an organic colorant selected from a pigment and/or a dye. Such colored fluids can be black in color and have a conductivity from 0 pS/cm to 5 pS/cm and a dielectric constant less than 3. The use of the colored fluids offers improvements in reliability, higher levels of chroma in the dispersed state, and the ability to achieve higher contrast ratios in display technologies.
摘要:
Colored metalorganic fluids for electrowetting, electrofluidic, and electrophoretic devices are disclosed. The colored fluid can include a polar or nonpolar solvent including silicon and/or germanium and a modified, oligomeric, or polymeric dye. The dye includes a chromophore attached to a low molecular weight group with molecular weight 10 to 800 or an oligomeric or polymeric chain, which includes silicon and/or germanium. The dye has a molecular weight from 100 to 100,000, solubility in the solvent of at least 5% wt at 25° C., and a dynamic viscosity from 0.5 cPs to 2,000 cPs at 25° C. If the solvent is polar, the fluid has a conductivity from about 0.01 pS/cm to 3000 pS/cm, a surface tension of 15 dynes/cm to 90 dynes/cm at 25° C., and a total content of monatomic ions with radii smaller than 2.0 A and polyatomic ions with radii smaller than 1.45 A less than 500 ppm.
摘要:
Certain poly(oxyalkylene) colorants are disclosed along with method of preparation thereof. A method of using these colorants as fluorescent security taggants is also disclosed.
摘要:
An apparatus for displaying procedural information cards on a computer video monitor includes a central shaft having an upper end and a lower end, the upper end capped by an upper cross member having an upper planar arm extending in one direction from the shaft, and an upper arcuate arm extending the opposite direction. The lower end is terminated by a lower cross member having a lower planar arm and a lower arcuate arm. The apparatus includes means for affixing the apparatus to a surface on a computer video monitor. The arcuate arms of the apparatus extend outwardly from the monitor to facilitate installation and flipping of the cards. Each of the arcuate arms comprises a generally semi-circular ring, and means for preventing inadvertent removal of the cards from the arcuate arms.
摘要:
Colored fluids for electrowetting, electrofluidic, and electrophoretic chromatophore devices are disclosed. In one embodiment, the colored fluid includes at least one solvent and at least one oligomeric and/or polymeric dye in the solvent. The oligomeric dye has at least one chromophore attached to one or more oligomeric chains, and the polymeric dye has at least one chromophore attached to one or more oligomeric and/or polymeric chains. The dye also has a molecular weight from 400 to 100,000, solubility in the solvent of at least 5% wt at 25° C., and a dynamic viscosity from 0.5 cPs to 2,000 cPs at 25° C. The solvent may be polar or non-polar each having specific properties defined.
摘要:
Disclosed are rare earth pigments, and methods for making and using these pigments, in security applications. The rare earth pigments are IR absorbers with unique spectral features and optionally exhibit color inconstancy.