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PROVIDING COLOR FILTERS ON ELECTRO-OPTIC DISPLAYS

IP.com Disclosure Number: IPCOM000028219D
Publication Date: 2004-May-04
Document File: 6 page(s) / 87K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention relates to providing color filters on electro-optic displays. More specifically, this invention relates to processes for providing color filters on electro-optic displays in which the electro-optic medium used is a solid (such displays may hereinafter for convenience be referred to as "solid electro-optic displays"), in the sense that the electro-optic medium has solid external surfaces, although the medium may, and often, does have internal liquid- or gas-filled spaces.

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PROVIDING COLOR FILTERS ON ELECTRO-OPTIC DISPLAYS

         This invention relates to providing color filters on electro-optic displays. More specifically, this invention relates to processes for providing color filters on electro-optic displays in which the electro-optic medium used is a solid (such displays may hereinafter for convenience be referred to as "solid electro-optic displays"), in the sense that the electro-optic medium has solid external surfaces, although the medium may, and often, does have internal liquid- or gas-filled spaces.

         Electro-optic displays comprise a layer of electro-optic material, a term which is used herein in its conventional meaning in the art to refer to a material having first and second display states differing in at least one optical property, the material being changed from its first to its second display state by application of an electric field to the material. The optical property is typically color perceptible to the human eye, but may be another optical property, such as optical transmission, reflectance, luminescence or, in the case of displays intended for machine reading, pseudo-color in the sense of a change in reflectance of electromagnetic wavelengths outside the visible range. The electro-optic material may be a particle-based electrophoretic material comprising at least one type of electrically charged particle capable of moving through a suspending fluid upon application of an electric field, and such an electrophoretic material may or may not be encapsulated; see, for example, 5,930,026; 5,961,804; 6,017,584; 6,067,185; 6,118,426; 6,120,588; 6,120,839; 6,124,851; 6,130,773; 6,130,774; 6,172,798; 6,177,921; 6,232,950;

6,249,721; 6,252,564; 6,262,706; 6,262,833; 6,300,932; 6,312,304; 6,312,971; 6,323,989;

6,327,072; 6,376,828; 6,377,387; 6,392,785; 6,392,786; 6,413,790; 6,422,687; 6,445,374;

6,445,489; 6,459,418; 6,473,072; 6,480,182; 6,498,114; 6,504,524; 6,506,438; 6,512,354; 6,515,649; 6,518,949; 6,521,489; 6,531,997; 6,535,197; 6,538,801; 6,545,291; 6,580,545;

6,639,578; 6,652,075; 6,657,772; 6,664,944; 6,680,725; 6,683,333; 6,704,133; 6,710,540;

6,721,083; 6,724,519; and 6,727,881; and U.S. Patent Applications Publication Nos. 2002/0019081; 2002/0021270; 2002/0060321; 2002/0063661; 2002/0090980; 2002/0113770;

2002/0130832; 2002/0131147; 2002/0171910; 2002/0180687; 2002/0180688; 2002/0185378; 2003/0011560; 2003/0011868; 2003/0020844; 2003/0025855; 2003/0038755; 2003/0053189;

2003/0102858; 2003/0132908; 2003/0137521; 2003/0137717; 2003/0151702; 2003/0214695; 2003/0214697; 2003/0222315; 2004/0008398; 2004/0012839; 2004/0014265; and 2004/0027327; and International Applications Publication Nos. WO 99/67678; WO 00/05704; WO 00/26761; WO00/36560; WO 00/38000; WO 00/38001; WO 00/67110; WO 00/67327; WO 01/07961; WO 01/08241; WO 03/107,315; WO 04/017135; WO 04/023195; and WO 04/023202. The entire disclosures of all these patents and published applications, all of which are in the name of, or ass...