Lens curvature variation apparatus
AssigneesLG Innotek Co., Ltd., Corning Incorporated
InventorsSeungheun Song, Sungoh Yang
Life of this patent
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Abstract
The present invention relates to a lens curvature variation apparatus. The lens curvature variation apparatus according to an embodiment is a lens curvature varying apparatus for varying a curvature of a liquid lens having a variable curvature based on an applied electric signal, the lens curvature varying apparatus comprising: And a control unit for controlling the lens driving unit to form a target curvature of the liquid lens on the basis of the sensed curvature, The sensor unit senses a change in the size or the area of the boundary area between the insulator on the electrode in the liquid lens and the electroconductive aqueous solution. Thereby, the curvature of the lens can be sensed quickly and accurately.
Claims19
A lens curvature variation apparatus for varying a curvature of a liquid lens based on an applied electrical signal, the lens curvature variation apparatus comprising:
- a lens driver to apply the electrical signal to the liquid lens;
- a sensor unit to sense the curvature of the liquid lens formed based on the electrical signal;
- and
- a controller to control the lens driver to form a target curvature of the liquid lens based on the sensed curvature,
- wherein the sensor unit senses a size of an area of a boundary region between an insulator on an electrode and an electroconductive aqueous solution in the liquid lens or a change in the size, and
- wherein the controller comprises:
- an equalizer configured to calculate a curvature error;
- and
- a pulse width variation controller configured to generate and output a pulse width variation signal based on the curvature error calculated by the equalizer.
A lens curvature variation apparatus for varying a curvature of a liquid lens based on an applied electrical signal, the lens curvature variation apparatus comprising:
- a lens driver to apply the electrical signal to the liquid lens;
- a sensor unit to sense the curvature of the liquid lens formed based on the electrical signal;
- and
- a controller to control the lens driver to form a target curvature of the liquid lens based on the sensed curvature,
- wherein the sensor unit senses a size of an area of a boundary region between an insulator on an electrode and an electroconductive aqueous solution in the liquid lens or a change in the size,
- wherein the liquid lens comprises:
- a common electrode;
- a plurality of electrodes spaced apart from the common electrode;
- and
- a liquid and the electroconductive aqueous solution disposed between the common electrode and the plurality of electrodes.
Dependencies are inferred from the claim text.