公开(公告)号：US20240271998A1

公开(公告)日：2024-08-15

申请号：US18568420

申请日：2022-06-03

Applicant: SIGNIFY HOLDING B.V.

Inventor： HAIMIN TAO ,  CHRISTIAN JORDAN ,  ALEKSANDAR SEVO ,  KARNEKUMAR ARULANDU

IPC: G01J1/44 ,  G01K7/22

CPC classification number: G01J1/44 ,  G01K7/22 ,  G01J2001/444 ,  G01J2001/4466

Abstract: A bias circuit (100) of an avalanche photodiode, APD, comprising: a voltage conversion module (110) connected to the APD, wherein the voltage conversion module (110) is configured to convert an input supply voltage (Vin) to a bias voltage for the APD; an error amplifier (120) connected to the voltage conversion module (110) for implementing a feedback control; a voltage feedback loop (130) configured to provide the error amplifier (120) a first analog signal related to the bias voltage; and a current feedback loop (140) configured to provide the error amplifier (120) a second analog signal related to the APD current; wherein the error amplifier (120) is configured to control the voltage conversion module (110) based on the first and the second analog signals.

公开(公告)号：US12061115B2

公开(公告)日：2024-08-13

申请号：US18169955

申请日：2023-02-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yun Jae Suh ,  Sung Ho Kim ,  Jun Seok Kim

IPC: G01J1/44 ,  G01J1/02 ,  H03F3/45 ,  G01J1/18

CPC classification number: G01J1/44 ,  G01J1/0238 ,  H03F3/45071 ,  G01J1/18 ,  G01J2001/446

Abstract: A data output device is provided. The data output device includes a converter circuit configured to generate a conversion signal based on an output signal; a boosting circuit configured to generate a boosting signal based on the output signal; and an output circuit configured to generate the output signal based on an input signal and a feedback signal, the feedback signal being based on the conversion signal and the boosting signal.

公开(公告)号：US20240267633A1

公开(公告)日：2024-08-08

申请号：US18615982

申请日：2024-03-25

Applicant: Apple Inc.

Inventor： Angelo M Alaimo ,  Shahrooz Shahparnia ,  Paul V. Johnson

IPC: H04N23/74 ,  G01J1/42 ,  G01J1/44 ,  G06F1/16

CPC classification number: H04N23/74 ,  G01J1/4204 ,  G01J1/429 ,  G01J1/44 ,  G06F1/1686 ,  G01J2001/444

Abstract: Various embodiments include a light source module with one or more light emitters and one or more light sensors that share an aperture via which light passes. One of the light sensors may measure illuminance received through the aperture (not illuminance from the light emitters) and send a signal indicating a measurement of the illuminance. The light source module may be integrated into a portable computing device having a controller. The controller may include logic to perform one or more device operations based on the measurement of illuminance, such as, but not limited to, controlling a device display brightness and/or controlling an auto exposure feature of the device camera. Calibration parameters for interpreting the signal may be determined via a calibration process.

公开(公告)号：US12052807B2

公开(公告)日：2024-07-30

申请号：US18212994

申请日：2023-06-22

Applicant: Lutron Technology Company LLC

Inventor： Horace C. Ho ,  Jason E. Lewis ,  David J. Knapp

IPC: H05B47/10 ,  G01J1/02 ,  G01J1/32 ,  G01J1/42 ,  G01J1/44 ,  G01J3/02 ,  G01J3/46 ,  G01J3/50 ,  G01R31/44 ,  H05B45/12 ,  H05B45/18 ,  H05B45/22 ,  H05B45/24 ,  H05B47/105 ,  H05B47/21 ,  H05B47/24

CPC classification number: H05B47/10 ,  G01J1/0252 ,  G01J1/32 ,  G01J1/42 ,  G01J3/0286 ,  G01J3/465 ,  G01J3/505 ,  G01R31/44 ,  H05B45/12 ,  H05B45/22 ,  H05B45/24 ,  H05B47/22 ,  H05B47/24 ,  G01J2001/4252 ,  G01J2001/444 ,  H05B45/18 ,  H05B47/105

Abstract: An illumination device and method are provided herein for calibrating individual LEDs in the illumination device to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.

公开(公告)号：US20240247977A1

公开(公告)日：2024-07-25

申请号：US18564177

申请日：2022-03-31

Applicant: ams-OSRAM International GmbH

Inventor： Gerd PLECHINGER

IPC: G01J1/08 ,  G01J1/44

CPC classification number: G01J1/08 ,  G01J1/44 ,  G01J2001/083 ,  G01J2001/446

Abstract: A measurement method for characterization of a photodetector includes illumination of the photodetector with a variable electromagnetic radiation. The variable electromagnetic radiation has a temporally oscillating radiation intensity with fixed period and amplitude. The method also includes illumination of the photodetector with a first electromagnetic radiation having a temporally constant first radiation intensity and measurement of a first output signal at the photodetector. The method further includes illumination of the photodetector with a second electromagnetic radiation having a temporally constant second radiation intensity different from the first radiation intensity and measurement of a second output signal at the photodetector. The method additionally includes determination of a non-linearity of the photodetector by comparing the measurements of the first and second output signals.

公开(公告)号：US12046917B2

公开(公告)日：2024-07-23

申请号：US18340355

申请日：2023-06-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weipeng Jiang ,  Tao Huang

IPC: H02J50/23 ,  G01J1/46 ,  H02J50/40 ,  G01J1/44

CPC classification number: H02J50/23 ,  G01J1/46 ,  H02J50/40 ,  G01J2001/446

Abstract: This application provides a wireless power transfer unit, device, and method. The wireless power transfer unit includes a radiation source, a light-emitting body, a controller, and a metasurface. The radiation source is configured to emit an electromagnetic wave signal. The controller is configured to control the light-emitting body to provide light sources of different light intensities. The light-emitting body provides the light sources of different light intensities in response to control of the controller. The metasurface is configured to perform phase adjustment on the electromagnetic wave signal that is incident to the metasurface. Equivalent impedance of the metasurface varies with a change of the light intensity, so that an offset of a phase of the electromagnetic wave signal emitted through the metasurface also varies with the change of the light intensity.

公开(公告)号：US12044569B2

公开(公告)日：2024-07-23

申请号：US18124952

申请日：2023-03-22

Applicant: Sumitomo Electric Industries, Ltd.

Inventor： Takuya Okimoto ,  Hideki Yagi ,  Takuya Mitarai

IPC: G01J1/44

CPC classification number: G01J1/44 ,  G01J2001/446

Abstract: A light receiving device includes a semiconductor substrate having a first major surface and a second major surface opposite to the first major surface, and a metal pattern layer provided on the second major surface. The first major surface is provided with a first input port configured to receive an input of signal light, a second input port configured to receive an input of local oscillation light, a first light receiving element optically coupled to the first input port, an optical 90 degree hybrid element optically coupled to the first input port and the second input port, and a second light receiving element optically coupled to the optical 90 degree hybrid element. The metal pattern layer contains at least one of titanium or chromium.

公开(公告)号：US12039902B2

公开(公告)日：2024-07-16

申请号：US17271309

申请日：2019-08-19

Applicant: ams International AG

Inventor： Ravi Kumar Adusumalli

IPC: G09G3/00 ,  G01J1/42 ,  G01J1/44 ,  G01K7/16 ,  G01K7/20 ,  G09G3/10 ,  G09G5/10

CPC classification number: G09G3/006 ,  G01J1/4204 ,  G01J1/44 ,  G01K7/20 ,  G09G5/10 ,  G01J2001/446 ,  G01K7/16 ,  G09G2320/041 ,  G09G2360/141 ,  G09G2360/144

Abstract: A temperature sensor arrangement includes a current integrating modulator that provides a count value dependent on the current supplied to its input terminal. A temperature-sensitive element includes a resistor to generate a current dependent on temperature. First and second switches alternately connect the temperature-sensitive element and another resistor to the input terminal of the current integrating modulator. The temperature sensor arrangement can be combined with an ambient light sensor sharing the current integrating modulator.

公开(公告)号：US12027635B2

公开(公告)日：2024-07-02

申请号：US18059307

申请日：2022-11-28

Applicant: SLT Technologies, Inc.

Inventor： Drew W. Cardwell ,  Mark P. D'Evelyn

IPC: H01L31/0232 ,  G01J1/04 ,  G01J1/44 ,  H01L31/109

CPC classification number: H01L31/02327 ,  G01J1/0425 ,  G01J1/44 ,  H01L31/109 ,  G01J2001/4466

Abstract: According to the present disclosure, techniques related to manufacturing and applications of power photodiode structures and devices based on group-III metal nitride and gallium-based substrates are provided. More specifically, embodiments of the disclosure include techniques for fabricating photodiode devices comprising one or more of GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, structures and devices. Such structures or devices can be used for a variety of applications including optoelectronic devices, photodiodes, power-over-fiber receivers, and others.

公开(公告)号：US12015700B2

公开(公告)日：2024-06-18

申请号：US16952499

申请日：2020-11-19

Applicant: The MITRE Corporation

Inventor： Daniel T. Stack ,  Stephen P. Pappas ,  Brandon V. Rodenburg ,  Colin P. Lualdi

IPC: H04L9/08 ,  G01J1/04 ,  H04L9/40 ,  G01J1/44

CPC classification number: H04L9/0852 ,  G01J1/0429 ,  H04L63/1475 ,  G01J2001/442

Abstract: A quantum cryptography apparatus and system includes a photon emitter, a photon receiver, a first photodetector, a second photodetector, a first polarization optic, and a second polarization optic. The photon emitter is configured to emit a photon at a wavelength. The photon receiver is coupled to the photon emitter by at least one quantum channel. The photon receiver includes the first polarization optic configured to output the emitted photon in a polarization state. The first photodetector is configured to detect the emitted photon from the output of the first polarization optic. The second photodetector is configured to detect a backflash from the first photodetector. The second polarization optic is between the first photodetector and the second photodetector. The second photodetector and the second polarization optic are configured to internally calibrate the photon receiver.