Abstract: The present invention is directed to driving waveforms and a driving method for an electrophoretic display. The method and waveforms have the advantage that the changes in the driving voltages due to the shift are minimized. In addition, the overall driving time for the waveforms is also shortened due to the shortened driving frames. There are no additional data points required as the number of the driving frames remains the same. Therefore, the power consumption is nearly identical with the waveform having driving frames of a fixed frame time.

Abstract: The present invention provides a solution for a highlight or multicolor display device, in which each display cell can display high quality color states. More specifically, an electrophoretic fluid is provided which comprises three types of pigment particles, having different levels of size, threshold voltage or charge intensity.

Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Abstract: The invention relates to electrophoretic layers containing at least five different particles, and to driving methods for displaying at least five, and in some embodiments, six different colors at each pixel or sub-pixel. The electrophoretic layers may also contain uncharged neutral buoyancy particles, and the driving methods may include special shaking waveform sequences.

Abstract: The present invention provides driving methods for electrophoretic color display devices. The backplane system used for the driving methods is found to be simpler which renders color display devices more cost effective. More specifically, the driving method comprises first driving all pixels towards a color state by modulating only the common electrode, followed by driving all pixels towards their desired color states by maintaining the common electrode grounded and applying different voltages to the pixel electrodes.

Abstract: The invention relates to electrophoretic layers containing at least five different particles, and to driving methods for displaying at least five, and in some embodiments, six different colors at each pixel or sub-pixel. The electrophoretic layers may also contain uncharged neutral buoyancy particles, and the driving methods may include special shaking waveform sequences.

Abstract: A color display device in which each pixel can display four high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture, wherein each type of particle has a different charge profile (polarity and magnitude) and a different optical characteristic. When driven with a two-step process, a mixture of the particles having the highest charge state can be seen at the viewing surface.

Abstract: The present invention is directed to driving methods for driving an electro-optic display device which can display high quality color states. The electro-optic display may have a plurality of display pixels, a first type of pigment particle, a second type of pigment particle, and a third type of pigment particle, wherein the three types of pigment particles have optical characteristics differing from one another, the method may include: (i) driving a display pixel to the color state of the first type of pigment particles or the color state of the second type of pigment particles; (ii) driving the pixel to a grey state between the color state of the first type of pigment particle and the color state of the second type of pigment particles; and (iii) applying at least one pair of opposite driving pulses.

Abstract: The present invention is directed to display devices comprising a watermark area and a non-watermark area. The display cells in the watermark area have widths of the partition walls, heights of the partition walls, top opening shapes or display cell sizes which are different from those of the display cells in the non-watermark area. The watermark aims to protect against counterfeiting or to be used for decoration purposes. The watermark is visible at certain viewing angles and/or under certain lighting conditions and it does not interfere with displaying of the regular images.

Abstract: The present invention is directed to driving methods for driving an electro-optic display device which can display high quality color states. The electro-optic display may have a plurality of display pixels, a first type of pigment particle, a second type of pigment particle, and a third type of pigment particle, wherein the three types of pigment particles have optical characteristics differing from one another, the method may include: (i) driving a display pixel to the color state of the first type of pigment particles or the color state of the second type of pigment particles; (ii) driving the pixel to a grey state between the color state of the first type of pigment particle and the color state of the second type of pigment particles; and (iii) applying at least one pair of opposite driving pulses.

Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof.

Abstract: An electrophoretic display including a passive matrix formed of row and column electrodes with an electrophoretic medium including two types of differently-colored charged particles disposed between the row and column electrodes. When the device is driven to a first color state by providing a voltage differential of 15V, the color state is stable for voltage differentials between 15V and ?5V. The display switches to the second color state when a voltage differential of ?15V is provided.

Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics, and provides for displaying at a viewing surface not only the colors of the three types of particles but also the colors of binary mixtures thereof.

Abstract: A method for driving an electro-optic display, the display having at least one display pixel coupled to a storage capacitor, the method include applying a waveform sequence to the at least one display pixel and connecting the storage capacitor to a first bias voltage, and maintaining a last frame voltage level on the display pixel after the completion of the applied waveform.

Abstract: The present invention is directed to an electrophoretic display device comprising microcells filled with an electrophoretic fluid and a dielectric layer, which comprises a first type of magnetic filler material, a second type of nonmagnetic filler material, and a polymeric material. The first and second types of filler material physically interact with each other and they are fixed and aligned in the dielectric adhesive layer in a direction perpendicular to a plane of the dielectric layer. The dielectric layer exhibits anisotropic conductivity having higher conductivity in the z direction compared to the other two orthogonal directions.

Abstract: A color display device in which each pixel can display four high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture, wherein each type of particle has a different charge profile (polarity and magnitude) and a different optical characteristic. When driven with a two-step process, a mixture of the particles having the highest charge state can be seen at the viewing surface.

Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.

Abstract: The present invention is directed to an electrophoretic display device comprising (a) microcells filled with an electrophoretic fluid, and (b) at least one dielectric layer which comprises at least two types of filler. Among the types of filler, at least one type is sensitive to a magnetic field.

Abstract: An electrophoretic display including a passive matrix formed of row and column electrodes with an electrophoretic medium including two types of differently-colored charged particles disposed between the row and column electrodes. When the device is driven to a first color state by providing a voltage differential of 15V, the color state is stable for voltage differentials between 15V and ?5V. The display switches to the second color state when a voltage differential of ?15V is provided.

Abstract: A color display device in which each pixel can display four high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture, wherein each type of particle has a different charge profile (polarity and magnitude) and a different optical characteristic. When driven with a two-step process, the particles of lower charge magnitude can be driven to the viewing surface while the particles with higher charge magnitude are not viewable at the viewing surface.