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Methods for addressing bistable electro-optic medium

An electro-optical and medium technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as unbalanced drive schemes

Active Publication Date: 2014-12-24
E INK CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the image is held for a long time by applying refresh pulses, these pulses need to be of the same polarity as the addressing pulses used to drive the associated pixels of that display to the optical state being held, which results in a DC unbalanced drive scheme

Method used

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  • Methods for addressing bistable electro-optic medium
  • Methods for addressing bistable electro-optic medium
  • Methods for addressing bistable electro-optic medium

Examples

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example 1

[0054] This example uses a display containing an encapsulated two-particle counter-charged medium comprising polymer-coated titanium oxide white particles and polymer-coated black particles, and the suspension is unpigmented. The display was prepared substantially according to "Method B" described in paragraphs [0061]-[0068] of the aforementioned 2002 / 0180687.

[0055] A display prepared as previously described, comprising a plurality of pixels, was able to transition these pixels between black and white optical states using an address pulse of ±15 V lasting 500 milliseconds (msec). The display has limited bistability, the white optical state changes 2L in the ambient * The time required by the unit is only about 15sec. However, it was empirically determined that the white and black optical states could be maintained indefinitely by applying short refresh pulses of ±15V at 4 sec / min (duty cycle approximately 6.7%). To provide a realistic test and to avoid flicker in ...

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PUM

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Abstract

Disclosed is a method for addressing a bistable electro-optic medium, wherein an alternating electric field with an offset is applied to the medium. Thus, a waveform element having an offset has the advantage of requiring no precise timing of a addressing pulse relative to other waveform elements.

Description

[0001] This application is a divisional application of the first divisional application of the following PCT international application filed on May 23, 2003: the international application number is PCT / US03 / 16434, the national application number is 03813604.X, the title of the invention It is "method for driving electro-optic display", the application number of the first divisional application is 200810215240.8, and the title of the invention is "method for driving electro-optic display". technical field [0002] The present invention relates to methods and devices for driving electro-optic displays, especially bistable electro-optic displays. The method and apparatus of the present invention are primarily, though not exclusively, useful for driving bistable electrophoretic displays. Background technique [0003] This application is related to US Patent Nos. 6,504,524 and 6,531,997. This application is also related to co-pending International Applications PCT / US02 / 1026...

Claims

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Application Information

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IPC IPC(8): G02F1/167G09G3/34G09G3/20G09G3/38
CPCG09G3/344G09G3/38G09G2300/0443G09G2310/02G09G2310/06G09G2310/061G09G2310/065G09G2320/0204G09G2320/0247G09G2320/04
Inventor G. M. 丹纳K. R. 阿蒙森A. C. 阿兰戈J. B. 埃温R. W. 泽纳
Owner E INK CORPORATION