Electrochromic display module and composition with improved performance
First Claim
1. An electrochromic display device comprising an electrochromic composition, said composition comprising:
- electro-active ink, a sulfone solvent, wherein at least about 50% of said solvent remains in the composition for a duration of at least about 3 years; and
particles generated in the composition, said particles remaining less than about 150 microns in size for a duration of at least about 3 years.
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Accused Products
Abstract
An electrochromic display module employing a unique combination of architecture and electrochromic composition to provide an extended life to the module. The architecture may involve the use of an extended seal about a perimeter of a display portion where the composition is located. In this manner, the rate of solvent leakage from the composition may be substantially reduced. Additionally, the electrochromic composition itself may make use of particular low volatility solvents and constituent combinations so as to discourage the amount particle generation therein. Ultimately, an electrochromic display module having a useful life of more than about 3 years may be provided.
22 Citations
18 Claims
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1. An electrochromic display device comprising an electrochromic composition, said composition comprising:
- electro-active ink, a sulfone solvent, wherein at least about 50% of said solvent remains in the composition for a duration of at least about 3 years; and
particles generated in the composition, said particles remaining less than about 150 microns in size for a duration of at least about 3 years. - View Dependent Claims (2, 16)
- electro-active ink, a sulfone solvent, wherein at least about 50% of said solvent remains in the composition for a duration of at least about 3 years; and
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3. An electrochromic display device comprising an electrochromic composition, said composition comprising:
- a solvent having characteristics of a volatility of less than about 0.03 torr at about 20°
C. and at least about a 3 year maintainability of at least about 50% retention relative the composition, and particles generated in the composition having a characteristic of less than about 150 microns in size for a duration of at least about 3 years. - View Dependent Claims (4, 5, 6, 7, 15)
- a solvent having characteristics of a volatility of less than about 0.03 torr at about 20°
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8. An electrochromic composition for an electronic display, the composition comprising a substantially soluble polymer solubilized in an electrochemically stable solvent having a volatility of less than about 0.03 torr at about 20°
- C. and wherein the solvent is sulfone.
- View Dependent Claims (9, 10, 11, 12, 13, 14)
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17. An electrochromic display device comprising an electrochromic composition, said composition comprising:
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electro-active ink, a solvent, a display portion for accommodating said electrochromic composition at a surface of a backplane substrate of the device, and a seal extending from a side of the display portion at a perimeter thereof to beyond about 0.12 inches across the backplane substrate for isolating said electrochromic composition thereat. - View Dependent Claims (18)
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Specification