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Components for electro-optic displays

An electro-optic display and electro-optic technology, applied in optical components, instruments, optics, etc., can solve problems such as not helping electro-optic layer conversion

Inactive Publication Date: 2009-02-18
E INK CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these cases, the applied voltage is divided so that only a very low potential drop is applied across the electro-optic layer. Instead, most of the potential drop is applied to the lamination adhesive layer, so this does not matter. Aids in the conversion of the electro-optic layer

Method used

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  • Components for electro-optic displays
  • Components for electro-optic displays
  • Components for electro-optic displays

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0084] Example 1: Fabrication of an experimental display

[0085] The polymer viscosity was substantially as described in paragraphs [0067] to [0074] of U.S. Patent Publication No. 2002 / 0180687 except that Dow Corning Q2-521 "Superwetting Agent" was added as a coating aid. A slurry containing the electrophoretic vesicles was prepared in the mixture. The slurry was then bar coated on the aluminum coated surface of an aluminized PET release sheet. In one process, the same aluminized surface has been pre-coated with a 20 μm layer of lamination adhesive of the type described in U.S. Patent No. 7,012,735 and doped with 20,000 ppm of butylammonium hexafluorophosphate; in a second process, a layer of the same 20 μm layer of the same lamination adhesive was laminated onto the ITO-coated surface of a PET / ITO release sheet, and the resulting subassembly Lamination to the electrophoretic layer / release sheet assembly such that the adhesive layer is laminated to the electrophoretic layer...

example 2

[0095] Example 2: Electro-optic test

[0096] The experimental display prepared in Example 1 above was driven between the extreme black and white optical states with a drive pulse of ±15 V, 500 ms, and the reflectance of these two extreme optical states was measured. The tests were performed at room temperature (20°C) and 0°C. in the attached picture Figure 4 shows the dynamic range (measured in L * The difference between the extreme black and white states in units (where L * Using the usual International Commission on Illumination (CIE) definition:

[0097] L * =116(R / R 0 ) 1 / 3 -16,

[0098] where R is the reflectance and R 0 is the standard reflectance value). In each test, the left column shows the results obtained at 20°C, while the right column shows the results obtained at 0°C.

[0099] from Figure 4 As can be seen in the "inverted" structure of the control and the present invention ( Figure 4 The two sets of columns on the left hand side, in the sense tha...

example 3

[0101] Example 3: Resolution

[0102] The resolution of the control display and the display of the present invention can be evaluated by microscopic examination of the display formed on the glass backplane; Figure 5 shows the observed differences. Such as Figure 5 As noted in , each of the displays used for testing consisted of two pixels separated by a 100 μm gap in which there was no ITO layer and therefore could not be switched. exist Figure 5 The left-hand side shows the control display (conventional FPL structure), in Figure 5 On the right hand side is the display of the present invention. Figure 5 Each side of is a combination of photomicrographs of three separate associated displays. Figure 5 The upper part of shows the display when the right pixel is switched to its white extreme optical state, while the Figure 5 The lower part of the shows the display when the right pixel is switched to its black extreme optical state.

[0103] from Figure 5 As can be ...

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Abstract

An electro-optic display comprises, in order, a backplane comprising a plurality of pixel electrodes; a layer of a solid electro-optic medium; a main adhesive layer; and at least one of a light-transmissive protective layer and a light-transmissive electrically-conductive layer. The electro-optic layer may be in direct contact with the backplane or separated therefrom by a thin auxiliary layer of adhesive. The main adhesive layer may be colored to provide a color filter array. An inverted front plane laminate useful in forming such a display comprises the same layers except that the backplane is replaced by a release sheet. The display combines good low temperature performance and good resolution at higher temperatures.

Description

technical field [0001] This invention relates to components for use in electro-optic displays. Some of the displays made according to the invention are color displays. The present invention relates primarily to components for forming an electro-optic display, in the sense that it has a solid outer surface, comprising a solid-state electro-optic medium (for convenience this type of display is hereinafter referred to as a "solid-state electro-optic display"), although the medium There can, and often do, have internal liquid or gas filled spaces; the invention also relates to methods of assembling displays utilizing such electro-optic media. Thus, the term "solid state electro-optic display" includes encapsulated electrophoretic displays, encapsulated liquid crystal displays, and other types of displays as described below. [0002] This application is related to US Patent Nos. 6,864,875, 6,982,178, and 7,110,164, as well as US Patent Application Publication No. 2005 / 0146774, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/00
Inventor T·H·怀特赛德斯R·J·小保利尼M·D·沃尔斯S·孙M·D·麦克里里G·M·丹纳C·H·霍尼曼
Owner E INK CORPORATION
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