公开(公告)号：US20240312424A1

公开(公告)日：2024-09-19

申请号：US18212205

申请日：2023-06-21

Applicant: HKC CORPORATION LIMITED

Inventor： Shixin WEI ,  Haijiang YUAN

IPC: G09G3/36 ,  G01J11/00 ,  G09G3/20

CPC classification number: G09G3/36 ,  G01J11/00 ,  G09G3/2096 ,  G09G2320/0247 ,  G09G2340/0435

Abstract: The present application provides a screen flicker debugging method of a display panel, an apparatus and a system. The display panel includes a first common voltage and a second common voltage. The voltage difference between the second common voltage and the first common voltage is configured as a reference voltage for deflection of the liquid-crystal molecules. The screen flicker debugging method of the display panel includes: acquiring a refresh rate interval of the display panel, and determining a minimum refresh rate; controlling the display panel to display a flickering picture with the minimum refresh rate; adjusting the reference voltage and acquiring flickering values of the flickering picture at different reference voltages; and determining the minimum flickering value and setting the corresponding reference voltage as the optimal reference voltage for the display panel. The flickering phenomenon of the display panel at high and low refresh rates is reduced.

公开(公告)号：US20240230419A1

公开(公告)日：2024-07-11

申请号：US18557871

申请日：2022-04-27

Applicant: Arizona Board of Regents on behalf of the University of Arizona

Inventor： Mohammed Tharwat Hassan MOHAMMED ,  Dandan HUI ,  Husain ALQATTAN

IPC: G01J11/00 ,  H01S3/00

CPC classification number: G01J11/00 ,  H01S3/0014

Abstract: System and method configured for real-time, direct, all-optical methodology of measurement of a temporal profile of optical field. In one case, such measurement is carried out by recording electronic delay response of a target material system triggered by a strong driving optical field (in particular—by pulsed light with sub-femtosecond pulses containing a few cycles of optical field each). A corresponding all-optical metrological tool configured to operate with (sub-)femtosecond resolution. Demonstration of the on-demand sub-femtosecond electron motion control in solid-state with the use of synthesized waveforms of optical field.

公开(公告)号：US20240102866A1

公开(公告)日：2024-03-28

申请号：US18254023

申请日：2021-09-24

Applicant: UNIVERSITE DE BOURGOGNE ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS -

Inventor： Pierre BEJOT ,  Franck BILLARD ,  Edouard HERTZ

IPC: G01J11/00 ,  G02B5/20 ,  H04N23/12

CPC classification number: G01J11/00 ,  G02B5/20 ,  H04N23/12

Abstract: A system for characterizing a pulse of electromagnetic radiation by time-resolved optical gating, which includes an interference-forming device which is adapted for superimposing four parts of the pulse. The system also includes a matrix image sensor which selectively captures, based on two-photon absorptions, an interference pattern formed by the pulse. The system allows obtaining the pulse shape completely and accurately, and is particularly suitable for characterizing ultrashort pulses. Also, the two-photon absorption can be produced in the matrix image sensor, or replaced by optical frequency doubling which is produced by an SHG crystal plate.

公开(公告)号：US20240056065A1

公开(公告)日：2024-02-15

申请号：US18491989

申请日：2023-10-23

Applicant: BEIHANG UNIVERSITY

Inventor： Boyu ZHANG ,  Wenlong CAI ,  Chen XIAO ,  Xiangyu ZHENG ,  Jiaqi WEI ,  Weisheng ZHAO

IPC: H03K5/01 ,  G01J11/00 ,  H03K5/14 ,  H01S3/094 ,  H01S3/091

CPC classification number: H03K5/01 ,  G01J11/00 ,  H03K5/14 ,  H01S3/094076 ,  H01S3/0912 ,  H01S2302/00 ,  H01S3/1625

Abstract: Disclosed are an ultrafast electric pulse generation and detection device and a use method thereof. The device includes a laser and an electric pulse generator. The electric pulse generator includes: a photoelectric material layer including an optically controlled switching region for responding to excitation light generated by the laser; an insulating layer formed on the photoelectric material layer, wherein a switch structure exists at a position of the insulating layer corresponding to the optically controlled switching region, so that the optically controlled switching region is partially exposed or completely exposed; transmission lines are formed on the insulating layer.

公开(公告)号：US11821793B2

公开(公告)日：2023-11-21

申请号：US17600667

申请日：2020-03-27

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Koyo Watanabe ,  Kyohei Shigematsu ,  Takashi Inoue

IPC: G01J3/453 ,  G01J11/00 ,  G01M11/00 ,  H01S3/00

CPC classification number: G01J3/453 ,  G01J11/00 ,  G01M11/3163 ,  H01S3/0057 ,  H01S3/0092

Abstract: A dispersion measurement apparatus includes a pulse forming unit, a correlation optical system, a photodetection unit, and an operation unit. The pulse forming unit forms a light pulse train including a plurality of light pulses having time differences and center wavelengths different from each other from a measurement target light pulse output from a pulsed laser light source. The correlation optical system receives the light pulse train output from the pulse forming unit and outputs correlation light including a cross-correlation or an autocorrelation of the light pulse train. The photodetection unit detects a temporal waveform of the correlation light output from the correlation optical system. The operation unit estimates a wavelength dispersion amount of the pulsed laser light source based on a feature value of the temporal waveform of the correlation light.

公开(公告)号：US20230318244A1

公开(公告)日：2023-10-05

申请号：US18177748

申请日：2023-03-02

Applicant: The Hong Kong University of Science and Technology ,  The Regents of the University of California

Inventor： Jingdi ZHANG ,  Xiaoyue ZHOU ,  Richard Douglas AVERITT

IPC: H01S3/00 ,  G01J11/00 ,  G02F1/35

CPC classification number: H01S3/0057 ,  G01J11/00 ,  G02F1/3501 ,  G02F2203/13

Abstract: An aspect of the present disclosure is related to a method for measuring and controlling linear chirp level of ultrafast laser pulse. The method includes steps as follows. A carrier-envelope phase-chirp (CEP-chirp) relation which serve as a chirp monitor is extracted, in which the CEP-chirp relation is generated from an ultrafast laser pulse. A linear chirp level of a target pulse is measured in response to the CEP-chirp relation. According to the measuring with respect to the linear chirp level of the target pulse, a dispersion element which the ultrafast laser pulse passes through is varied to control and stabilize the linear chirp level of the target pulse.

公开(公告)号：US11733103B2

公开(公告)日：2023-08-22

申请号：US17484563

申请日：2021-09-24

Applicant: National Yang Ming Chiao Tung University

Inventor： Chih-Wei Luo ,  Yi-Chen Liu ,  Tien-Tien Yeh

IPC: G01J11/00

CPC classification number: G01J11/00

Abstract: An optical pulse measuring method measuring an optical pulse generated from a pulse light source is provided. The method includes: splitting the optical pulse and then focusing them at a measuring point, so as to generate gas plasma by the autocorrelation of the split optical pulses; receiving the sound signal from the gas plasma and generate a plasma sound signal; and using the plasma sound signal to calculate the characteristics of the optical pulse. A measuring device is also provided.

公开(公告)号：US11692879B2

公开(公告)日：2023-07-04

申请号：US17427899

申请日：2020-02-18

Applicant: The Secretary of State for Defence

Inventor： David Lanto Hillier ,  David Norman Winter

IPC: G01J11/00 ,  G01R29/02

CPC classification number: G01J11/00 ,  G01R29/02

Abstract: The invention relates to devices and methods of characterising a single unknown pulse signal. They create multiple replica of the original that may be more reliably measured, by dividing the signal through nodes and using different signal pathways that may apply a temporal delay. The device and methods have multiple fields of application, most notably with the internal confinement fusion industry.

公开(公告)号：US20220407279A1

公开(公告)日：2022-12-22

申请号：US17787096

申请日：2020-12-16

Applicant: UNIVERSIDAD DE SALAMANCA ,  SPHERE ULTRAFAST PHOTONICS, S.L.

Inventor： Iñigo Juan SOLA LARRAÑAGA ,  Benjamín ALONSO FERNÁNDEZ

IPC: H01S3/00 ,  G01J11/00 ,  G01J3/45

Abstract: The method comprises A method includes steps for creating at least two replicas of an input pulse to be characterised, varying the relative amplitude of the two replicas within a range, creating a nonlinear signal at each case of said amplitude variation, measuring the spectra of the nonlinear signals and recovering the spectral amplitude and phase of the input pulse with a proper algorithm. The system includes a replicator for creating at least two replicas of the input pulse and varying their relative amplitude within a range of relative amplitudes, a nonlinear medium, which obtains a nonlinear signal for each relative amplitude, and an analyzer, associated to the nonlinear signal for measuring and characterising spectrally each nonlinear signal.

公开(公告)号：US11522334B2

公开(公告)日：2022-12-06

申请号：US16885129

申请日：2020-05-27

Applicant: INSTITUTE OF PHYSICS, CHINESE ACADEMY OF SCIENCES

Inventor： Shaobo Fang ,  Zhiyi Wei ,  Pei Huang ,  Yitan Gao ,  Kun Zhao

IPC: G01J11/00 ,  G02F1/35 ,  G01J9/02 ,  G02B27/10 ,  G02B27/14 ,  H01S3/13 ,  H01S3/123 ,  H01S3/10 ,  H01S3/00 ,  G02B26/06

Abstract: Methods and devices are described for performing an all-phase measurement of an ultra-fast laser pulse having a spectral range of greater than one octave. The ultra-fast laser pulse may be split into a first beam comprising a fundamental light with a wavelength λ0 and a second beam comprising a light with a wavelength 2λ0. The light with the wavelength 2λ0 may be frequency doubled to a light with a wavelength λ0 to generate an interference with the fundamental light. Fourier transform may be performed on an interference spectrum of the interference, and a relative envelope delay (RED) between the fundamental light and the frequency doubled light and a carrier envelope phase (CEP) may be acquired based on a result of the Fourier transform.