Patent ID: 9250457
Filing Date: 2016-02-02
CPC Classification: G01D,G02F,G09G

Claim Text:
1. A driver for a liquid crystal lens comprising: a liquid crystal lens which adjusts a focal length according to a voltage applied thereto; a lens driver which applies the voltage to the liquid crystal lens; a sensor which detects a first voltage corresponding to a first time and a second voltage corresponding to a second time of the liquid crystal lens at a predetermined interval; a sensor driver which detects a temperature of the liquid crystal lens by receiving a voltage from the sensor, calculates a compensated voltage corresponding to an ideal voltage at a receiving time of a voltage received by the sensor from the liquid crystal lens using the first voltage and the second voltage, estimates a compensated temperature corresponding to the compensated voltage for the detected temperature of the liquid crystal lens, and determines whether the compensated temperature maintains a preset range for the driver for the liquid crystal lens to perform a control operation; and a heater driver which, according to the determination by the sensor driver, controls heat generation of the liquid crystal lens to maintain a temperature of the liquid crystal lens in the preset range, wherein the first time elapses from the receiving time by the predetermined interval and the second time elapses from the first time by the predetermined interval, and the compensated voltage is calculated by subtracting a difference between the first voltage and the second voltage from the first voltage.