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1. WO2020112589 - FORMULATION DE MATRICE POUR ÉCRANS À CRISTAUX LIQUIDES DISPERSÉS DANS UN POLYMÈRE DANS UNE APPLICATION DE CHAMP ÉLECTROMAGNÉTIQUE À COURANT CONTINU (CC) À FAIBLE PUISSANCE

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CLAIMS

What is claimed is:

1. A pre-polymer matrix formulation for a polymer dispersed liquid crystal (PDLC) display, the pre-polymer matrix formulation comprising:

a monofunctional monomer;

a trifunctional oligomer; and

a trifunctional monomer.

2. A formulation as recited in claim 1, wherein a concentration of the

monofunctional monomer is in a range of 80 weight% to 90 weight% of a total weight of the formulation.

3. A formulation as recited in claim 1, wherein a concentration of the trifunctional oligomer is in a range of 10 weight% to 20 weight% of a total weight of the formulation.

4. A formulation as recited in claim 1, wherein a concentration of the trifunctional monomer is in a range of 1 weight% to 2 weight% of a total weight of the formulation.

5. A formulation as recited in claim 1 , wherein each component of the pre-polymer matrix formulation has at least one reactive functional group selected from the group consisting of: acrylate, mercaptan, vinyl, and epoxide.

6. A formulation as recited in claim 1, comprising a plurality of liquid crystal (LC) molecules dispersed in the pre-polymer matrix formulation, wherein the pre polymer matrix formulation is configured to adjust a morphology of each LC domain comprising the LC molecules to have an average diameter in a range of about 500 nanometers to about 2 microns.

7. A formulation as recited in claim 1, wherein a ratio of the monofunctional

monomenthe trifunctional oligomerthe trifunctional monomer is about 80 to 90: 10 to 20: 1 to 2.

8. A product, comprising:

a polymer dispersed liquid crystal (PDLC) display formulation comprising a polymer matrix having a plurality of liquid crystal (LC) domains dispersed therein,

wherein the polymer matrix comprises a polymerized product of a

monofunctional monomer, a trifunctional oligomer, and a trifunctional monomer; and

a pair of electrodes having the PDLC display formulation positioned

therebetween,

wherein the PDLC display formulation is characterized as having a substantially constant optical transparency during application of a low power direct current electromagnetic field between the electrodes for a predefined duration of time.

9. A product as recited in claim 8, wherein the PDLC display formulation has a thickness, wherein the low power direct current electromagnetic field is at least 2.5 pW of the thickness.

10. A product as recited in claim 8, wherein the PDLC display formulation has a thickness, wherein the low power direct current electromagnetic field is in a range of at least 2.5 pW of the thickness to less than 30 pW of the thickness.

11. A product as recited in claim 8, wherein the PDLC display formulation has a thickness, wherein a direct current voltage is applied to the electrodes in a range of greater than 2.5 volts of the thickness to less than 30 volts of the thickness.

12. A product as recited in claim 8, wherein the optical transparency remains

substantially constant during application of the low power direct current electromagnetic field for a duration of time in a range of greater than 10 seconds to less than about 3000 seconds.

13. A system, comprising:

a polymer dispersed liquid crystal (PDLC) display formulation comprising a polymer matrix having a plurality of liquid crystal (LC) domains dispersed therein,

wherein the polymer matrix comprises a polymerized product of a

monofunctional monomer, a trifunctional oligomer, and a trifunctional monomer;

a first substrate and a second substrate, wherein the PDLC display formulation is disposed between the first and second substrates;

at least one electrode layer wherein the PDLC display formulation is positioned adjacent to the at least one electrode layer; and

a power circuit for applying a direct current electromagnetic field across the at least one electrode layer.

14. A system as recited in claim 13, wherein the substrates include at least one

material selected from the group consisting of: glass material and polymeric material.

15. A system as recited in claim 13, wherein the PDLC display formulation has a thickness, wherein the direct current electromagnetic field is at least 2.5 pW of the thickness.

16. A system as recited in claim 13, wherein the PDLC display formulation has a thickness, wherein the direct current electromagnetic field is in a range of at least 2.5 pW of the thickness to less than 30pW of the thickness.

17. A system as recited in claim 13, wherein the PDLC display formulation has a thickness defined between the first and second substrates, wherein the thickness is in a range of greater than about 5 microns to less than about 80 microns.

18. A system as recited in claim 17, wherein a direct current voltage is applied to the at least one electrode layer in a range of greater than 2.5 volts of the thickness to about 30 volts of the thickness.

19. A system as recited in claim 13, wherein the PDLC display formulation is

configured to have an optical transparency during application of a low power direct current electromagnetic field between the electrodes for a predefined duration of time.

20. A system as recited in claim 19, wherein the optical transparency remains

substantially constant during application of the low power direct current electromagnetic field for the predefined duration of time.

21. A system as recited in claim 20, wherein the optical transparency remains

substantially constant during application of the low power direct current

electromagnetic field for a duration of time in a range of greater than 10 seconds

to less than about 3000 seconds.