Abstract: The present invention relates to a new type of current driving circuit, which has high linearity during low current driving, comprising: a voltage-current conversion unit for converting an input voltage into a current; a digital analog converter (DAC) connected to an output terminal of the voltage-current conversion unit and for generating and outputting a voltage corresponding to an applied digital code; a field effect transistor having a first electrode connected to a load and a second electrode connected to a node connected to a resistor, and for allowing a current to flow to the load in response to a voltage applied to a gate; an amplifier for receiving the voltage output from the digital analog converter and a voltage generated by the resistor, generating a voltage for controlling such that a current flows from the field effect transistor, and applying same to the gate; a current supply source for supplying to the first electrode a current required for operating the field effect transistor in a saturatio

Abstract: The present invention relates to a haptic feedback system and, particularly, to a device and a method for controlling an actuator for haptic feedback, the method comprising: a first step of controlling the output of an oscillator such that a clock necessary in the generation of a driving signal for driving an actuator is oscillated at a reference clock frequency; a second step of calculating the resonance frequency of the actuator from a cycle of a BEMF signal according to the driving of the actuator; and a third step of calculating a clock frequency for following the calculated resonance frequency of the actuator so as to newly change and set same to the reference clock frequency, thereby controlling the output of the oscillator.

Abstract: The present invention relates to a device for controlling a multi-axial point tilt of a camera lens and a method therefor, characterized by controlling a camera lens to move within a common stroke section among respective stroke sections in which the camera lens can move in an axis direction (z-axis) parallel to an optical axis direction at each of three or more axial points, wherein the camera lens is moved to a target position by using a compensation factor that is compensated such that a lens movement distance for each control code is the same.

Abstract: The present invention relates to a device for controlling a multi-axial point tilt of a camera lens and a method therefor, characterized by controlling a camera lens to move within a common stroke section among respective stroke sections in which the camera lens can move in an axis direction (z-axis) parallel to an optical axis direction at each of three or more axial points, wherein the camera lens is moved to a target position by using a compensation factor that is compensated such that a lens movement distance for each control code is the same.

Abstract: The present invention relates to a new type of current driving circuit, which has high linearity during low current driving, comprising: a voltage-current conversion unit for converting an input voltage into a current; a digital analog converter (DAC) connected to an output terminal of the voltage-current conversion unit and for generating and outputting a voltage corresponding to an applied digital code; a field effect transistor having a first electrode connected to a load and a second electrode connected to a node connected to a resistor, and for allowing a current to flow to the load in response to a voltage applied to a gate; an amplifier for receiving the voltage output from the digital analog converter and a voltage generated by the resistor, generating a voltage for controlling such that a current flows from the field effect transistor, and applying same to the gate; a current supply source for supplying to the first electrode a current required for operating the field effect transistor in a saturatio

Abstract: The present invention relates to a method for transmitting data in a camera module which transmits data necessary for camera shake correction, and the present invention comprises a first step in which each actuator movement detection element sequentially transmits the axial movement distance detection data detected through a Hall sensor in a two-wire interface manner without correction after each specified time delay, in a first transmission section in which each piece of axial movement distance detection data of the actuator has to be transmitted to a controller module for a shake correction; and a second step in which each actuator movement detection element sets just the variation between previously transmitted axial movement distance data and currently detected axial movement distance detection data as each piece of axial movement distance detection data with respect to each axis and sequentially transmits in the two-wire manner after the same specified time delay, respectively, in a transmission section

Abstract: The present invention relates to a camera module actuator movement sensing element required for camera shake correction, and a camera module flexible circuit board including the same.

Abstract: The present invention relates to a haptic feedback system and, specifically, to a device and method for controlling an actuator for haptic feedback, the method comprising: an actuator resonance frequency correction driving step of driving an actuator by repeatedly generating and outputting a drive signal including a driving time interval in which driving voltage is applied to the actuator and a guard time interval in which a back electromotive force (BEMF) signal of the actuator is detected, while correcting the length of the driving time interval according to detection time of a zero cross point of the BEMF signal detected within the guard time interval; and an actuator braking step of outputting at least one brake signal in synchronization with a zero cross point of the BEMF signal detected within the guard time interval, in order to remove residual vibration of the actuator.

Abstract: The present invention relates to a haptic feedback system and, particularly, to a device and a method for controlling an actuator for haptic feedback, the method comprising: a first step of controlling the output of an oscillator such that a clock necessary in the generation of a driving signal for driving an actuator is oscillated at a reference clock frequency; a second step of calculating the resonance frequency of the actuator from a cycle of a BEMF signal according to the driving of the actuator; and a third step of calculating a clock frequency for following the calculated resonance frequency of the actuator so as to newly change and set same to the reference clock frequency, thereby controlling the output of the oscillator.

Abstract: The present invention relates to a method for setting slave identification information for an actuator movement sensing element and, more particularly, to a method for sensing a distance, by which an actuator having a lens assembly coupled thereto has moved in one direction among an x-axis, a y-axis, and a z-axis, and transmitting the sensed distance to a master controller according to a two-wire interface scheme. The method comprises the steps of: when a slave identification information change command is received from a master controller, checking whether actuator movement distance sensing data is input from a hall sensor allocated to itself; and as a result of the checking, when actuator movement distance sensing data equal to or greater than a set value is input, setting slave identification information assigned at the time of production to be changed into slave identification information transmitted by the master controller.

Abstract: The present invention relates to an image stabilization control device for an imaging device, the image stabilization control device stabilizing the shaking of a subject, caused by vibration applied to an imaging device, and comprising: filters for outputting rotational angular speed data in which a low-frequency component is removed from a rotational angular speed outputted from each of vibration detection sensors of an imaging device according to filter coefficients, which are variably set; a lens moving distance calculation unit processing output signals of the filters so as to calculate a lens moving distance; and a filter coefficient variable control unit for varying the filter coefficients of the filters in order to increase a lens return speed in a lens movement limited area, when the lens moving distance outputted from the lens moving distance calculation unit goes beyond the lens movement limit area having been virtually set.

Abstract: The present invention relates to a method for transmitting data in a camera module which transmits data necessary for camera shake correction, and the present invention comprises a first step in which each actuator movement detection element sequentially transmits the axial movement distance detection data detected through a Hall sensor in a two-wire interface manner without correction after each specified time delay, in a first transmission section in which each piece of axial movement distance detection data of the actuator has to be transmitted to a controller module for a shake correction; and a second step in which each actuator movement detection element sets just the variation between previously transmitted axial movement distance data and currently detected axial movement distance detection data as each piece of axial movement distance detection data with respect to each axis and sequentially transmits in the two-wire manner after the same specified time delay, respectively, in a transmission section

Abstract: The present invention relates to a camera module actuator movement sensing element required for camera shake correction, and a camera module flexible circuit board including the same.

Abstract: The present invention relates to a driving control of a voice coil motor (hereinafter, referred to as ‘VCM’) which moves lens of a camera module, more particularly to a driving control method for VCM capable of reducing the noise generated at the time of initial driving or landing of the lens and reducing the moving time thereof, and the method is characterized by and include the steps of: applying a linearly increasing current with a first slope to the VCM up to a pre-set first inflection point in response to a camera operation-on command; and moving the lens to an infinite position by applying a linearly increasing current with a second slope less steep than the first slope to the VCM from the first inflection point to the infinite position.

Abstract: The present invention relates to a method for setting slave identification information for an actuator movement sensing element and, more particularly, to a method for sensing a distance, by which an actuator having a lens assembly coupled thereto has moved in one direction among an x-axis, a y-axis, and a z-axis, and transmitting the sensed distance to a master controller according to a two-wire interface scheme. The method comprises the steps of: when a slave identification information change command is received from a master controller, checking whether actuator movement distance sensing data is input from a hall sensor allocated to itself; and as a result of the checking, when actuator movement distance sensing data equal to or greater than a set value is input, setting slave identification information assigned at the time of production to be changed into slave identification information transmitted by the master controller.

Abstract: The present invention relates to an image stabilization control device for an imaging device, the image stabilization control device stabilizing the shaking of a subject, caused by vibration applied to an imaging device, and comprising: filters for outputting rotational angular speed data in which a low-frequency component is removed from a rotational angular speed outputted from each of vibration detection sensors of an imaging device according to filter coefficients, which are variably set; a lens moving distance calculation unit processing output signals of the filters so as to calculate a lens moving distance; and a filter coefficient variable control unit for varying the filter coefficients of the filters in order to increase a lens return speed in a lens movement limited area, when the lens moving distance outputted from the lens moving distance calculation unit goes beyond the lens movement limit area having been virtually set.

Abstract: The present invention relates to a driving control of a voice coil motor (hereinafter, referred to as ‘VCM’) which moves lens of a camera module, more particularly to a driving control method for VCM capable of reducing the noise generated at the time of initial driving or landing of the lens and reducing the moving time thereof, and the method is characterized by and include the steps of: applying a linearly increasing current with a first slope to the VCM up to a pre-set first inflection point in response to a camera operation-on command; and moving the lens to an infinite position by applying a linearly increasing current with a second slope less steep than the first slope to the VCM from the first inflection point to the infinite position.

Abstract: A driver for a liquid crystal lens, an imaging apparatus and a temperature controlling method thereof, include: 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 driver which detects a temperature of the liquid crystal lens, compensates for the detected temperature, and determines whether the compensated temperatures 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. Thus, the driver detects a temperature of the liquid crystal lens accurately by compensating for a resistance value from the liquid crystal lens to thereby maintain stability of the imaging apparatus.

Abstract: A light driving apparatus includes a first rectifying unit for receiving AC power and rectifying the AC power into DC, a switching element controlled to turn on or off by a control signal, a transforming unit having a transformer and an inductor connected to a primary side of the transformer in parallel, a second rectifying unit for rectifying a secondary side output of the transforming unit and supplying an output voltage thereof to a LED unit, and a control unit provided in the primary side to give a constant-current control function so that a secondary side output is maintained consistently. According to the present disclosure, it is possible to simplify the circuit structure of the secondary side and improve the efficiency by controlling the secondary side current at the primary side without secondary side feedback information.

Abstract: The present disclosure relates to a light driving apparatus which may stably drive an LED light at a normal operation by feeding back the output voltage of the LED light and stably drive the LED light at an abnormal operation by feeding back the voltage supplied to the LED light, and the light driving apparatus includes: a rectifier circuit; a transformer circuit; a power factor correction circuit; a smoothing circuit; a constant-current driving circuit; a dimming control circuit; a photo-coupler; a sample and hold circuit; a first photo-coupler driving circuit for feeding back the voltage output from the sample and hold circuit and applying the feedback voltage as a driving voltage of the photo-coupler; and a second photo-coupler driving circuit for feeding back the voltage output from the smoothing circuit and supplied to the LED module and supplying the feedback voltage as a driving voltage of the photo-coupler.