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US 10,649,116 B2Granted
Auto focusing device
AssigneeElectronics and Telecommunications Research Institute
InventorsKi-Uk Kyung, Bong Je Park, Sang-Youn Kim, Sae Kwang Nam, Sun Tak Park, Sung Ryul Yun
Life of this patent
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Abstract
An auto focusing lens includes an active lens including a lens body including electroactive polymer and a transparent electrode at least partially coated on a surface of the lens body, and a controller controlling the focus of the active lens by applying a voltage to the transparent electrode.
Claims11
An auto focusing device comprising:
- at least one lens including a front surface and a rear surface opposite the front surface;
- a support frame;
- a variable frame extending between the support frame and the at least one lens, the variable frame including a variable body supporting the at least one lens relative to the support frame, the variable body including electroactive polymer, and a transparent electrode coated on at least part of a surface of the variable body;
- and
- a controller controlling a focus of the lens by applying a voltage to the transparent electrode,
- wherein the variable frame includes a first variable frame and a second variable frame, the first variable frame arranged relative to the second variable frame to be closer than the second variable frame to a front side of the auto focusing device,
- wherein the transparent electrode includes a first transparent electrode coated on at least a part of a first variable body of the first variable frame and a second transparent electrode coated on at least part of a second variable body of the second variable frame,
- wherein the first variable body is separated from the second variable body,
- wherein the controller controls a position of the at least one lens in a thickness direction by selectively applying a voltage to the first transparent electrode and the second transparent electrode, and
- wherein controlling a position of the at least one lens includes changing a position of each of the front surface and the rear surface of the at least one lens.
7 more elements
An auto focusing device comprising:
- at least one lens including a front surface and a rear surface opposite the front surface;
- a support frame;
- a variable frame extending between the support frame and the at least one lens, the variable frame including a variable body supporting the at least one lens relative to the support frame, the variable body including electroactive polymer, and a transparent electrode coated on at least part of a surface of the variable body;
- and
- a controller controlling a focus of the lens by applying a voltage to the transparent electrode,
- wherein the variable frame includes a first variable frame and a second variable frame, the first variable frame arranged relative to the second variable frame to be closer than the second variable frame to a front side of the auto focusing device,
- the transparent electrode includes a first transparent electrode coated on at least a part of a first variable body of the first variable frame and a second transparent electrode coated on at least part of a second variable body of the second variable frame,
- the first variable body includes electroactive polymer,
- the second variable body includes electroactive polymer,
- the first transparent electrode is a front transparent electrode coated on at least a part of a front surface of the first variable body,
- the transparent electrode includes an intermediate transparent electrode at least partially interposed between the first variable body and the second variable body, and
- the second transparent electrode is a rear transparent electrode coated on at least a part of a rear surface of the second variable body.
9 more elements
An auto focusing device comprising:
- at least one lens including a front surface and a rear surface opposite the front surface;
- a support frame;
- a variable frame extending between the support frame and the at least one lens, the variable frame including a variable body supporting the at least one lens relative to the support frame, the variable body including electroactive polymer, and a transparent electrode coated on at least part of a surface of the variable body;
- and
- a controller controlling a focus of the lens by applying a voltage to the transparent electrode,
- wherein the variable frame includes a first variable frame and a second variable frame, the first variable frame arranged relative to the second variable frame to be closer than the second variable frame to a front side of the auto focusing device,
- the transparent electrode includes a first transparent electrode coated on at least a part of a first variable body of the first variable frame and a second transparent electrode coated on at least part of a second variable body of the second variable frame,
- the at least one lens includes first and second lenses each including the front surface and the rear surface and arranged to have the same optical axis, the first variable frame supports the first lens, and the second variable frame supports the second lens, and
- positions of the first and second lenses are independently changed as a voltage is independently applied to the first variable frame and the second variable frame by the controller, such that the front surface and the rear surface of the first lens move independently of the front surface and the rear surface of the second lens.
6 more elements
Dependencies are inferred from the claim text.