公开(公告)号：US10824050B2

公开(公告)日：2020-11-03

申请号：US14821395

申请日：2015-08-07

Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY

Inventor： Javier Calpe Maravilla ,  Eoin E. English ,  Rafael Mahiques ,  Jose Carlos Canada ,  Maria Jose Martinez

IPC: G03B3/10

Abstract: Actuators are used to move a variety of objects to desired positions. It is generally desirable that they can do this quickly without exhibiting overshoot or ringing. Some actuators are required to respond very quickly and examples of these are voice coil drivers used to move lenses in autofocus cameras provided in everyday devices such as smart phones and tablets. A rapid two step controller scheme had already been disclosed by Analog Devices Inc. While the scheme works well, it can only be used reliably if the resonant frequency of the actuator is known to within 2 or 3%. The inventors have discovered that the resonant frequency of an actuator unexpectedly changes as a function of position. This disclosure provides ways of modifying the control scheme to cope with changes in resonant frequency.

公开(公告)号：US10419741B2

公开(公告)日：2019-09-17

申请号：US15442418

申请日：2017-02-24

Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY

Inventor： Javier Calpe Maravilla ,  Eoin English ,  Maurizio Zecchini ,  Chao Wang

IPC: H04N13/271 ,  H04N13/296 ,  G01S7/481 ,  G01S17/89 ,  G01S17/02 ,  G01S17/42 ,  G01S7/48 ,  G01S7/486 ,  H04N13/00

Abstract: Aspects of the embodiments are directed to time-of-flight (ToF) imaging systems and method for image processing. The ToF imaging system can include a depth sensor; a light steering device; a photodetector; and an image processor. The ToF imaging system can be configured to acquiring a first image of a scene by the photodetector; identifying one or more regions of interest of the scene from the first image; and capturing a depth map of at least one of the one or more regions of interest.

公开(公告)号：US10598771B2

公开(公告)日：2020-03-24

申请号：US15409183

申请日：2017-01-18

Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY

Inventor： Chao Wang ,  Eoin English ,  Javier Calpe Maravilla ,  Maurizio Zecchini

IPC: G01S7/48 ,  G01S7/481 ,  G01S7/484 ,  G01S17/08 ,  G01S17/89 ,  G01S17/10 ,  G01S7/4865

Abstract: Aspects of the embodiments are directed to a time-of-flight imaging system and methods of using the same. The time-of-flight imaging system includes a light emitter comprising at least one one-dimensional array of laser diodes; a photosensitive element for receiving reflected light from an object; and a light deflection device configured to deflect light from the light emitter to the object. In embodiments, the time-of-flight imaging system includes a lens structure to deflect emitting light from the laser diodes at a predetermined angle towards a light steering device.

公开(公告)号：US10551215B2

公开(公告)日：2020-02-04

申请号：US14737403

申请日：2015-06-11

Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY

Inventor： Eoin E. English ,  Javier Calpe Maravilla ,  Robert Guyol ,  Alan J. O'Donnell ,  Maria Jose Martinez ,  Jan Kubik ,  Krystian Balicki

IPC: G01D5/20

Abstract: An embodiment of a position sensing system includes a signal generation circuit to generate an excitation signal according to a selected characteristic signal, a drive circuit to drive an excitation source with the excitation signal, an input circuit to receive a sensor output while driving the excitation source, a signal detection circuit to identify a component of the sensor output corresponding to the characteristic signal, and a control circuit to determine the position of the movable object as a function of the identified component of the sensor output. The positioning system may be included an electronic camera, where the movable object may be a lens. The excitation source may be a conductive coil, the excitation a magnetic field, and the sensor a magneto resistive sensor. Alternatively, the excitation source may be an optical excitation source, the excitation an optical excitation, and the sensor an optical sensor.