E Ink California, LLC

Sipix Technology, Inc.

E Ink Holdings Inc.

Sipix Imaging, Inc.

Ping-Yueh Cheng

Craig Lin

HongMei Zang

Ming Wang

Peter B Laxton

Jo-Cheng Huang

Heng-Che Chen

Feng-Shou Lin

Wen-Pin Chiu

Chun-An Wei

Bryan K Chan

Robert Arthur Sprague

Chi-Mao Hung

Yao-Jen Hsieh

Tin Quang Pham

Bo-Ru Yang

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.

Driving methods to produce a mixed color state for an electrophoretic display

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.

Driving methods for color display device

A driving method of an electrophoretic display having at least one display particle is provided. The driving method includes the following steps. A first voltage difference is applied to a data line in a first period, in which the data line corresponds to one of the display particles. At least one particle restore period is inserted in the first period, and a second voltage difference is applied to the data line in the particle restore periods, in which the second voltage difference is different from the first voltage difference. With this method disclosed here, the maxima brightness, maxima darkness, contrast ratio, color saturation, bistability, and image updating time can be largely improved.

Driving method of electrophoretic display

A driving method for an electro-phoretic display apparatus is disclosed. The method includes generating a common voltage by a common voltage generator held at a first voltage level before a polarity transfer, generating the common voltage held at a second voltage level when the polarity transfer starts during a first timing period, and generating the common voltage transfers held at a third voltage level during a second timing period after the first timing period, in which the second voltage level is between the first and the third voltageE levels.

Electro-phoretic display apparatus and driving method thereof

A multiplex electrophoretic display driver circuit comprises a memory unit, a display controller and a voltage driving unit. The memory unit has two registers respectively storing the current and former gray-level matrix signals. The gray-level matrix signal contains gray-level data corresponding to electrophoretic pixels. The display controller has an encoding circuit and a counting circuit. The encoding circuit generates a difference-value matrix signal containing difference values according to a difference between the current and former gray-level matrix signals and then generates a voltage-difference matrix signal containing voltage-difference signals corresponding to the electrophoretic pixels. The counting circuit receives the difference-value matrix signal and counts to generate refreshing values corresponding to the difference values. The encoding circuit adds the refreshing values to a next-cycled difference-value matrix signal to generate a new voltage-difference matrix signal. The voltage driving unit drives the electrophoretic pixels according to the voltage-difference matrix signal.

Multiplex electrophoretic display driver circuit

The present invention is directed to a driving method for compensating the response speed change of an electrophoretic display due to temperature variation, photo-degradation or aging of the display device, without a complex structure (e.g., use of sensors). This is accomplished by combining two waveforms, one of which causes the grey level to become dimmer and the other waveform causes the grey level to become brighter, as the response speed degrades.

Spatially combined waveforms for electrophoretic displays

An electro-phoretic display apparatus is disclosed. The electro-phoretic display apparatus mentioned above includes a plurality of pixel unit lines, a plurality of common voltage transferring lines, and a common voltage generator. The common voltage transferring lines extend and connect to a common line segment directly along a layout direction. The common voltage generator generates a common voltage and provides the common voltage for directly electrically connecting to a connection point on the common line segment. Moreover, the transfer timing delays of transferring the common voltage from the connection point to the first common voltage transferring line and the last common voltage transferring line are the same.

Electro-phoretic display apparatus

A frequency conversion correction circuit for an electrophoretic display (EPD) which has a control circuit to capture pixel signals of a next picture and gets a corresponding update signal from a look up table to be output, and a driving circuit to provide a plurality set of potential difference signals corresponding to a plurality set of electrodes of an EPD panel according to the update signal. The EPD further has an environment detection device and a duty frequency judgment unit. The environment detection device detects the operation environments of the EPD and gets an environment parameter. The duty frequency judgment unit compares the preset signal value sections where the environment parameter is located and generates a duty frequency signal and sends to the driving circuit. The driving circuit changes and outputs the frequency of the potential difference signals in a fixed frame time according to the duty frequency signal.

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Taoyuan, Taiwan

Ping-Yueh Cheng