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Composition of black and white electrophoretic display liquid for electrophoretic display and preparation method thereof

An electrophoretic display, black and white technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of slow response speed, less research on dispersion media, poor response contrast, etc., to improve response speed, improve display effect, reduce The effect of viscosity

Active Publication Date: 2012-01-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the dispersion medium of the existing black-and-white electrophoretic display liquid is mostly tetrachlorethylene, which is poor in compatibility with the environment. The display device prepared by the black-and-white electrophoretic display liquid with tetrachlorethylene as the dispersion medium has higher contrast and faster response speed. Fast; while there are few studies on the dispersion medium of the Isopar series with good environmental compatibility, and the display device prepared by the black-and-white electrophoretic display liquid using the Isopar series as the dispersion medium either does not respond, or the contrast of the response is poor, and the response speed is slow

Method used

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  • Composition of black and white electrophoretic display liquid for electrophoretic display and preparation method thereof
  • Composition of black and white electrophoretic display liquid for electrophoretic display and preparation method thereof

Examples

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Effect test

example 1

[0029] In the ball mill bottle, add 10mL of Isopar G, 0.05g of T31, 0.10g of CH-5 and 1.00g of TiO 2 Nanoparticles or 0.30g carbon black nanoparticles were ground with 2mm zirconia zirconia beads as the grinding medium at a speed of 600r / min for 20h to prepare white and black electrophoretic display solutions, respectively. Mix the black and white electrophoretic display solution at a ratio of 1:30, add 0.02g of perfluorooctanesulfonyl fluoride and 0.03g of A4100, and mix evenly to obtain the black and white particle electrophoretic display solution.

[0030] Put the electrophoretic display solution of the present invention into the sedimentation bottle, and observe that the display solution remains stable after standing for a week. Fill the electrophoretic display solution of the present invention into the microcup display device, the distance between the two pole plates is 0.1mm, apply a positive and negative alternating voltage of 15V, and observe the display effect, the co...

example 2

[0032] In the ball mill bottle, add 10mL of Isopar H, 0.20g of T152, 0.50g of CH-6 and 5.00g of TiO 2 Nanoparticles or 2.00 g of carbon black nanoparticles were ground with 2 mm zirconia zirconia beads as the grinding medium at a speed of 600 r / min for 24 hours to prepare white and black electrophoretic display solutions, respectively. Mix the black and white electrophoretic display liquid at a ratio of 1:15, add 0.06 g of perfluorooctanesulfonyl fluoride and 0.20 g of A4100, and mix evenly to obtain the black and white particle electrophoretic display liquid.

[0033] Put the electrophoretic display solution of the present invention into the sedimentation bottle, and observe that the display solution remains stable after standing for a week. Fill the electrophoretic display solution of the present invention into the microcup display device, the distance between the two pole plates is 0.1mm, apply a positive and negative alternating voltage of 15V, and observe the display effe...

example 3

[0035] In the ball mill bottle, add 10mL of Isopar L, 0.10g of T151, 0.15g of CH-13 and 2.00g of TiO 2 Nanoparticles or 0.40 g of carbon black nanoparticles were ground with 2 mm zirconia zirconia beads as the grinding medium at a speed of 600 r / min for 28 hours to prepare white and black electrophoretic display solutions, respectively. Mix the black and white electrophoretic display solution at a ratio of 1:20, add 0.03g of perfluorooctanesulfonyl fluoride and 0.05g of A4100, and mix evenly to obtain the black and white particle electrophoretic display solution.

[0036] Put the electrophoretic display solution of the present invention into the sedimentation bottle, and observe that the display solution remains stable after standing for a week. Fill the electrophoretic display solution of the present invention into the microcup display device, the distance between the two pole plates is 0.1mm, apply a positive and negative alternating voltage of 15V, and observe the display e...

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Abstract

The invention relates to a composition of black and white electrophoretic display liquid for electrophoretic display and a preparation method thereof; the black and white electrophoretic display liquid respectively adopts carbon black and titanium dioxide nanoparticles as black and white electrophoretic particles; the concentration of the particles in the black and white electrophoretic display liquid is respectively 3 percent to 20 percent and 10 percent to 50 percent, and the mass ratio of the black and white electrophoretic display liquid is 1:15 to 1:30; the dispersion media are Isopar series, the dispersing agents are fluorinated surfactant and polymer dispersant, and the used amount of the dispersing agents is 3 percent to 40 percent of the used amount of the electrophoretic particles. The preparation method of the black and white electrophoretic display liquid comprises the steps that: first, the black and white particles, the polymer dispersant and the dispersion media are respectively ball milled to prepare the black and white electrophoretic display liquid, are mixed by a certain ratio, and are added with the fluorinated surfactant, so that the black and white electrophoretic display liquid is prepared. The electrophoretic display liquid is prepared into a micro-cup device, the spacing of two polar plates is 0.1mm, 15V forward and backward alternating voltage is applied, the response of the electrophoretic display liquid is good, the contrast is above 23:1 and the highest contrast is 38:1, the black display response time is 831ms, and the white display response time is 1123ms.

Description

technical field [0001] The present invention relates to the composition and preparation method of a black and white electrophoretic display liquid for electrophoretic display, in particular to using titanium dioxide nanoparticles as white electrophoretic particles, carbon black nanoparticles as black electrophoretic particles, Isopar as a dispersion medium, fluorine-containing surfactant and The polymer is a dispersant, and a black-and-white double-display electrophoretic display liquid is formed by electrophoretic particles, a dispersion medium and a dispersant. technical background [0002] Display technologies mainly include: cathode ray tube display, liquid crystal display, thin film electroluminescent flat panel display and electrophoretic display. Electrophoretic display was first proposed by Panasonic Corporation of Japan in the 1970s, which uses colored charged particles to move under an electric field to develop color. Electrophoretic display has attracted widespre...

Claims

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Application Information

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IPC IPC(8): G02F1/167
Inventor 李祥高柳志杰王世荣梅夜明张静
Owner TIANJIN UNIV
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