E Ink California, LLC

Sipix Imaging, Inc.

Bo-Ru Yang

Robert Arthur Sprague

Craig Lin

Peter B Laxton

Yao-Jen Hsieh

Hui Du

Haiyan Gu

Roman A Ivanov

Yih-Ming Kang

Hong-Mei Zang

T J Lin

Ying-Tsang Liu

Chun-An Wei

TJ Lin

The present invention is directed to an electrophoretic dispersion comprising charged pigment particles, in particular, an electrophoretic dispersion including both uncharged or lightly charged neutral buoyancy particles and uncharged or lightly charged additive particles. The combination improves the performance of an electrophoretic display, in particular the color state stability over time.

Electrophoretic dispersion including charged pigment particles, uncharged additive nanoparticles, and uncharged neutral density particles

The present invention is directed to an electrophoretic dispersion, in particular, an electrophoretic dispersion comprising uncharged or lightly charged additive particles for improving bistability of an electrophoretic display. The average diameter of the additive particles is about 1% to about 25% of the average hydrodynamic diameter of the charged pigment particles.

Electrophoretic dispersion

The invention is directed to an electrophoretic fluid which can improve display performance such as switching speed, vertical bistability and the ghosting effect, and also reduce display defects. The electrophoretic fluid comprises charged pigment particles dispersed in a mixture of isoparaffins.

Electrophoretic display fluid

The present invention is directed to a driving method for a display having a binary color system, which method can effectively improve the performance of an electrophoretic display. The method comprises applying a series of driving voltages to said pixel and the accumulated voltage integrated over a period of time from the first image to the last image is 0 (zero) or substantially 0 (zero) volt&#x2022;msec.

Driving method for electrophoretic displays with different color states

The present invention is directed to an electrophoretic display film comprising: a) microcups each having a first shape, and b) remaining microcups which take up at least 10% of the total number of microcups and have shapes different from the first shape. The microcup designs of the present invention not only may reduce the Moir&#xe9; pattern, but it may also make the defects of the microcup walls much less noticeable, and therefore increase the cutting yield.

Microcup designs for electrophoretic display

The present invention is directed to a display device comprising a display fluid layer sandwiched between a first substrate layer and a second substrate layer, and a light-enhancing layer between the display fluid layer and the second substrate layer. The light-enhancing structure can enhance the colors displayed by the display device, especially the colors displayed through lateral switching of the charged pigment particles in an electrophoretic fluid.

Light-enhancing structure for electrophoretic display

The present invention is directed to a driving method, in particular a three dimensional driving scheme for electrophoretic display devices. The method comprises applying a driving step in each of at least two electric fields to drive two types of pigment particles of different colors laterally and/or vertically for separately adjusting the grayscale and/or colors of the display. The present driving method has the advantage that the brightness and color intensity of the images may be separately tuned.

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Banqiao, Taiwan

Bo-Ru Yang