Compositions, methods and systems for making and using electronic paper

• US 20080297878A1
• Filed: 09/19/2006
• Published: 12/04/2008
• Est. Priority Date: 10/01/2003
• Status: Abandoned Application

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Brown, R. Malcolm, Sun, Yuyu, Wenz, Robert
• Application Number:
  US11/523,304
• Publication Number:
  US 20080297878A1
• Time in Patent Office: Days
• US Class Current: 359/263
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G02F 1/1673 by magnetophoresis
• CPC Class Codes: G02F 2202/02 organic material
• CPC Class Codes: G02F 2202/04 dye
• CPC Class Codes: G02F 2203/68 Green display, e.g. recycling, reduction of harmful substances

Abstract

The present invention is a device, method and system for making a display and displaying information that includes a fibrous organic substrate, e.g., multiribbon cellulose or cellulose substrate, and a variable reflectivity dye disposed in the fibrous substrate, wherein the reflectivity of the dye is modulated in situ. The display device may use a dye selected from an electrochromic, a thermochromic, a magnetochromic, an ionochromic, a light sensitive, a fluorescent, a fluorescent effect energy transfer dye or combinations thereof and may be used as high storage, high contrast and/or high definition paper.

Claims

1. A display device comprising:

a biodegradable multi-ribbon cellulose substrate;

one or more variable reflectivity dyes embedded in or on the substrate, wherein the reflectivity of the dye is modulated in situ by an electromagnetic source; and

a control logic that controls one or more electromagnetic sources, wherein the output from the one or more electromagnetic sources changes the reflectivity of the one or more dyes.

2. The display device of claim 1, wherein the dye comprises an electrochromic, a thermochromic, a magnetochromic, an ionochromic, a light sensitive, a fluorescent, a fluorescent effect energy transfer dye or combinations thereof and the one or more electromagnetic source produces are matched to change the reflectivity of the respective one or more dyes.

3. The display device of claim 1, wherein the multi-ribbon cellulose substrate is made by Acetobacter xylinum strain NQ-5.

4. The display device of claim 1, wherein the substrate comprises a carboxymethylcellulose, a methylcellulose, a hydroxyethylcellulose, a hydroxypropylcellulose, a hydroxypropylmethylcellulose, mixtures or combinations thereof.

5. The display device of claim 1, further comprising a non-biodegradable passivation layer disposed on or about the substrate.

6. The display device of claim 1, wherein the substrate is optically opaque.

7. The display device of claim 1, wherein the reflectivity of the dye is modified with an electric field.

8. The display device of claim 1, wherein the reflectivity of the dye is modified with an electric field of between about −

5 to about +5 volts.

9. The display device of claim 1, wherein the dye comprises a dialkyl derivatives of 4,4′

-bipyridinium salts, WO₃, MoO₃, Prussian blue (PB, ironIII-hexacyanoferrate II), tetrathiafulvalene (TTF), V₂O₅, Nb₂O₅, TiO₂, IrO₂, NiO_x, CO₂O₃ or combinations thereof.

10. A system for changing the display information on a multi-ribbon microbial cellulose substrate that has been embedded with one or more electrochromic dyes, the system comprising:

an electric field generator in communication with a control logic; and

a mechanism for progressively moving the electric field generator in relation to the substrate, wherein one or more electric fields that emanate from the electric field generator change the optical absorption characteristics of the electrochromic dye.

11. The system of claim 10, wherein the electrochromic dye is modified with an electric field of between about −

5 to about +5 volts.

12. The system of claim 10, wherein the substrate is optically opaque.

13. The system of claim 10, wherein the substrate comprises a multi-ribbon cellulose produced by Acetobacter xylinum strain NQ-5.

14. The system of claim 10, wherein the electric fields are formed by emitters embedded in or about the substrate.

15. The system of claim 10, wherein the substrate further comprises a passivation layer disposed on a display surface of the substrate.

16. The system of claim 10, further comprising a transceiver in or about the substrate in communication with the control logic.

17. The system of claim 10, further comprising a power source connected to, in or about the substrate connected to the control logic.

18. The system of claim 10, further comprising a power source comprising a paper battery connected to the control logic.

19. The system of claim 10, wherein the electric field is generated by a remote emitter.

20. The system of claim 10, wherein the electric field generator comprises a printer head and the mechanism for moving the electric field in relation to the substrate is a printer.

21. The system of claim 10, wherein the substrate comprises an electrically conductive cellulose and the control logic is formed in the substrate.

22. A rewritable display system comprising:

a multi-ribbon cellulose substrate;

an electrochromic dye covalently attached to the substrate, and

an electric field generator in communication with the substrate, wherein the generator produces an electric field with sufficient energy to modulate the light absorption characteristics of the dye.

23. The system of claim 22, wherein the substrate comprises a rewritable surface, a map, a wallpaper, a street sign, a billboard, a newspaper, a book, a computer screen, a wall, an electronic book, a storage device, a display, a high resolution display, a sheet or combinations thereof.

24. A cellulose display device comprising:

a biodegradable multi-ribbon cellulose substrate comprising one or more electrochromic dye regions;

a memory cell with a polysilicon-to-substrate storage capacitor, the memory cell comprising;

a single CMOS transistor having an inherent junction capacitor and electrically connected to the polysilicon-to-substrate storage capacitor;

a bit-line providing data to the memory cell;

a word address line; and

an electric field generator controlled by the memory cell, wherein the generator produces an electric field with sufficient energy to modulate the light absorption characteristics of the dye.

25. An in-plane switching device comprising:

a biodegradable multi-ribbon cellulose substrate having a first and a second surface onto which one or more variable intensity dye regions have been bound and at least one conductive pattern is deposited on each of the first and second surfaces, wherein the light absorption characteristics of the dye are modified when the device is exposed to an electric field created between the conductive patterns on the first and second surfaces.

26. The device of claim 25, wherein the conductive pattern is an array of conductive patterns, each pattern addressable separately by a control logic.