Fluid for electrowetting device and electrowetting device using the same
First Claim
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1. A fluid for an electrowetting device, the fluid comprising:
- a polarizable liquid; and
a nonpolar solution separated from the polarizable liquid by an interface,wherein the polarizable liquid comprises a polar solvent, an organic acid, and ammonium hydroxide having at least one alkyl group,wherein a weight of the organic acid with respect to a total weight of the polarizable liquid is 0.1% to 10%,wherein the polar solvent comprises ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethylene glycol, propylene carbonate, diethyl carbonate, gamma-butyrolactone (GBL), dimethylformamide (DMF), N-methylpyrrolidone (NMP), or a mixture thereof, andwherein a weight ratio of the ammonium hydroxide having the at least one alkyl group to the organic acid is in a range of about 0.8 to about 1.2, andwhen the weight ratio is 1, the polarizable liquid has a first surface tension,when the weight ratio is 0.8, the polarizable liquid has a surface tension of about 50% of the first surface tension, andwhen the weight ratio is 1.2, the polarizable liquid has a surface tension of about 200% of the first surface tension.
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Abstract
An electrowetting device which includes a polarizable liquid; and a nonpolar solution separated from the polarizable liquid by an interface. The polarizable liquid may include a polar solvent, an organic acid, and ammonium hydroxide having at least one alkyl group.
11 Citations
14 Claims
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1. A fluid for an electrowetting device, the fluid comprising:
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a polarizable liquid; and a nonpolar solution separated from the polarizable liquid by an interface, wherein the polarizable liquid comprises a polar solvent, an organic acid, and ammonium hydroxide having at least one alkyl group, wherein a weight of the organic acid with respect to a total weight of the polarizable liquid is 0.1% to 10%, wherein the polar solvent comprises ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethylene glycol, propylene carbonate, diethyl carbonate, gamma-butyrolactone (GBL), dimethylformamide (DMF), N-methylpyrrolidone (NMP), or a mixture thereof, and wherein a weight ratio of the ammonium hydroxide having the at least one alkyl group to the organic acid is in a range of about 0.8 to about 1.2, and when the weight ratio is 1, the polarizable liquid has a first surface tension, when the weight ratio is 0.8, the polarizable liquid has a surface tension of about 50% of the first surface tension, and when the weight ratio is 1.2, the polarizable liquid has a surface tension of about 200% of the first surface tension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14)
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8. An electrowetting device comprising:
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a first electrode and a second electrode facing each other; a dielectric film formed on the first electrode and the second electrode; and a fluid for electrowetting disposed between the first electrode and the second electrode, and separated from the first electrode and the second electrode by the dielectric film, wherein the fluid for electrowetting comprises a polarizable liquid comprising a polar solvent, an organic acid, and ammonium hydroxide having at least one alkyl group, and a nonpolar solution separated from the polarizable liquid by an interface, wherein a weight of the organic acid with respect to a total weight of the polarizable liquid is 0.1% to 10%, wherein the polar solvent comprises ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethylene glycol, propylene carbonate, diethyl carbonate, gamma-butyrolactone (GBL), dimethylformamide (DMF), N-methylpyrrolidone (NMP), or a mixture thereof, and wherein a weight ratio of the ammonium hydroxide having the at least one alkyl group to the organic acid is in a range of about 0.8 to about 1.2, and when the weight ratio is 1, the polarizable liquid has a first surface tension, when the weight ratio is 0.8, the polarizable liquid has a surface tension of about 50% of the first surface tension, and when the weight ratio is 1.2, the polarizable liquid has a surface tension of about 200% of the first surface tension. - View Dependent Claims (9, 10, 11, 12)
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13. An electrowetting cell comprising:
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a first electrode; a second electrode; and a fluid comprising a polarizable liquid and a nonpolar solution, wherein the polarizable liquid and the nonpolar solution are separated by an interface, the polarizable liquid comprises a polar solvent, an organic acid, and ammonium hydroxide having at least one alkyl group, and signals applied to the first and second electrodes control an incline angle of the interface, wherein a weight of the organic acid with respect to a total weight of the polarizable liquid is 0.1% to 10%, wherein the polar solvent comprises ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethylene glycol, propylene carbonate, diethyl carbonate, gamma-butyrolactone (GBL), dimethylformamide (DMF), N-methylpyrrolidone (NMP), or a mixture thereof, and wherein a weight ratio of the ammonium hydroxide having the at least one alkyl group to the organic acid is in a range of about 0.8 to about 1.2, and when the weight ratio is 1, the polarizable liquid has a first surface tension, when the weight ratio is 0.8, the polarizable liquid has a surface tension of about 50% of the first surface tension, and when the weight ratio is 1.2, the polarizable liquid has a surface tension of about 200% of the first surface tension.
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Specification