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An electrophoretic display with reduced cross walk

A bistable display, voltage waveform technology, applied in the field of reducing crosstalk, can solve problems such as image retention, crosstalk, jitter ghosting, etc.

Inactive Publication Date: 2007-03-28
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, when updating a bistable display such as an electrophoretic display, especially when pixels undergoing transitions between the same or substantially similar optical states are in close proximity to pixels undergoing transitions between opposite or substantially different optical states, Crosstalk occurs, including image retention and jittery ghosting

Method used

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  • An electrophoretic display with reduced cross walk
  • An electrophoretic display with reduced cross walk
  • An electrophoretic display with reduced cross walk

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Embodiment Construction

[0024] Each of the following is incorporated herein by reference.

[0025] European patent application EP02078823.8 (Proxy No.: PHNL020844) filed on September 16, 2002, entitled "Electrophoretic Display Panel";

[0026] European patent application EP03100133.2 (Proxy No.: PHNL030091) filed on January 23, 2003, entitled "Electrophoretic Display Panel";

[0027] European patent application EP02077017.8 entitled "Display Device" filed on May 24, 2002, or WO03 / 079323 published on February 6, 2003 entitled "Electrophoretic Active Matrix DisDlay Device" (attorney number: PHNL020441); and

[0028] European patent application EP03101705.6 (attorney number: PHNL030661) filed on June 11, 2003, entitled "Electrophoretic Display Unit".

[0029] 1 and 2 show an embodiment of a part of a display panel 1 of an electronic reading device having a first substrate 8 , a second opposing substrate 9 and a plurality of picture elements 2 . In a two-dimensional structure, the picture elements 2 ma...

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Abstract

A technique for driving a bi-stable display (310) such as an electrophoretic display with reduced cross talk, including reduced image retention and dithering ghosting. Drive waveforms are aligned so that, during an image update period, image transitions (500, 600, 700, 800, 900) between substantially similar optical states (e.g., black-to-black) are terminated substantially later than image transitions (520, 620, 720, 920) between substantially different optical states (e.g., black-to-white). Additionally, a drive pulse in the waveforms for the transitions between the similar states compensates for cross talk caused by a drive pulse in the waveforms for the transitions between the different states. The waveforms include at least one extreme drive pulse (ED, EDI, ED2, ED3) and an additional pulse (A) of opposite polarity.

Description

technical field [0001] The present invention relates generally to electronic reading devices such as electronic books and electronic newspapers, and more particularly to a method and apparatus for reducing crosstalk when updating bi-stable displays. Background technique [0002] Recent technological advances have provided "user-friendly" electronic reading devices, such as electronic books, which have opened up many opportunities. For example, electrophoretic displays make us have a lot to look forward to. Such displays have an intrinsic memory behavior and can hold images for relatively long periods of time without power consumption. Power is consumed only when the display needs to be refreshed or updated with new information. Therefore, the power consumption in this display is very low, suitable for application in portable electronic reading devices such as electronic books and electronic newspapers. Electrophoresis refers to the movement of charged particles in an appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/20
CPCG09G2310/065G09G3/2014G09G2320/041G09G2320/0209G09G2310/06G09G3/2051G09G2300/08G09G3/344
Inventor G·周J·范德卡默M·T·约翰逊
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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