Disclosed are a liquid lens and a liquid lens module, which enhance the fill factor of a liquid lens having an inclined partition, thereby achieving a low drive voltage and a high fill factor. The liquid lens includes an oil layer and a conductive liquid inside a chamber having an inclined partition
Disclosed are a liquid lens and a liquid lens module, which enhance the fill factor of a liquid lens having an inclined partition, thereby achieving a low drive voltage and a high fill factor. The liquid lens includes an oil layer and a conductive liquid inside a chamber having an inclined partition. The oil layer is formed of an oil mixture obtained by mixing at least two types of oils having different indices of refraction, and the oil mixture has the index of refraction corresponding to the index of refraction of the material in which the chamber is formed.
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1. A liquid lens comprising: a chamber formed in a first material, the chamber having a surface and inclined sidewalls that extend from the surface, the first material having an index of refraction;a first electrode covering the surface and the inclined sidewalls of the chamber, the first electrode
1. A liquid lens comprising: a chamber formed in a first material, the chamber having a surface and inclined sidewalls that extend from the surface, the first material having an index of refraction;a first electrode covering the surface and the inclined sidewalls of the chamber, the first electrode being a transparent electrode;an oil layer in the chamber, the oil layer including a mixture of a first oil and a second oil, the first oil and the second oil having different indices of refraction, the oil layer having an index of refraction corresponding to the index of refraction of the first material; anda conductive liquid on the oil layer,wherein the oil layer includes chloronaphthalene within a range from 57 vol % to 63 vol % and dodecane within a range from 43 vol % to 37 vol %. 2. The liquid lens according to claim 1, wherein the inclined sidewalls have an inclination angle within a range from 40 degrees to 70 degrees with respect to the surface of the chamber. 3. The liquid lens according to claim 1, further comprising: an insulation layer on the first electrode. 4. The liquid lens according to claim 1, wherein the index of refraction of the oil layer and the index of refraction of the first material are within ±0.2 of one another. 5. The liquid lens according to claim 1, wherein the first material comprises a transparent plastic material including at least one of: polymethyl methacrylate (PMMA), polyethylene tetraphthalate (PET), and polycarbonate (PC). 6. The liquid lens according to claim 1, wherein the first material includes polymethyl methacrylate (PMMA). 7. The liquid lens according to claim 1, further comprising a second electrode that contacts the conductive liquid. 8. A liquid lens comprising: a chamber formed in a first material, the chamber having a surface and inclined sidewalls that extend from the surface, the first material having an index of refraction;an oil layer in the chamber, the oil layer including a mixture of a first oil and a second oil, the first oil and the second oil having different indices of refraction, the oil layer having an index of refraction within ±0.2 of the index of refraction of the first material; anda conductive liquid on the oil layer, wherein the index of refraction of the oil mixture is determined by the following Equation: nid=[ϕA(n*A)2+ϕB(n*B)2]1/2 where, ØA and ØB are respectively percentages of the first oil and the second oil, and n*A and n*B are respectively indices of refraction of the first oil and the second oil. 9. The liquid lens according to claim 8, further comprising: a transparent electrode covering the surface and the inclined sidewalls of the chamber. 10. A liquid lens module comprising: a first substrate;a liquid lens array disposed on the first substrate, and the liquid lens array including a plurality of liquid lenses, each of the liquid lenses including: a chamber formed in a first material, the chamber having a surface and inclined sidewalls that extend from the surface, the first material having an index of refraction;a first electrode covering the surface and the inclined sidewalls of the chamber, the first electrode being a transparent electrode;an oil layer in the chamber, the oil layer including a mixture of a first oil and a second oil, the first oil and the second oil having different indices of refraction, the oil layer having an index of refraction corresponding to the index of refraction of the first material; anda conductive liquid on the oil layer; anda second substrate opposite the first substrate,wherein the oil layer includes chloronaphthalene within a range from 57 vol % to 63 vol % and dodecane within a range from 43 vol % to 37 vol %. 11. The liquid lens module according to claim 10, wherein the inclined sidewalls have an inclination angle within a range from 40 degrees to 70 degrees with respect to the surface of the chamber. 12. The liquid lens module according to claim 10, each of the liquid lenses further including: an insulation layer on the first electrode. 13. The liquid lens module according to claim 10, wherein the index of refraction of the oil layer and the index of refraction of the first material are within ±0.2 of one another. 14. The liquid lens module according to claim 10, wherein the first material comprises a transparent plastic material including at least one of: polymethyl methacrylate (PMMA), polyethylene tetraphthalate (PET), and polycarbonate (PC). 15. The liquid lens module according to claim 10, wherein the first material includes polymethyl methacrylate (PMMA). 16. The liquid lens module according to claim 10, further comprising a second electrode that contacts the conductive liquid. 17. A liquid lens module comprising: a first substrate;a liquid lens array disposed on the first substrate, and the liquid lens array including a plurality of liquid lenses, each of the liquid lenses including: a chamber formed in a first material, the chamber having a surface and inclined sidewalls that extend from the surface, the first material having an index of refraction;an oil layer in the chamber, the oil layer including a mixture of a first oil and a second oil, the first oil and the second oil having different indices of refraction, the oil layer having an index of refraction within ±0.2 of the index of refraction of the first material; anda conductive liquid on the oil layer; anda second substrate opposite the first substrate, wherein the index of refraction of the oil mixture is determined by the following Equation: nid=[ϕA(n*A)2+ϕB(n*B)2]1/2 where, ØA and ØB are respectively percentages of the first oil and the second oil, and n*A and n*B are respectively indices of refraction of the first oil and the second oil. 18. The liquid lens module according to claim 17, wherein each of the liquid lenses includes: a transparent electrode covering the surface and the inclined sidewalls of the chamber.
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