Patents by Inventor De-Fu LIU

De-Fu LIU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240144868
    Abstract: The present disclosure provides a pixel circuit with pulse width compensation, and the pixel circuit includes a pulse width modulation circuit and a pulse amplitude modulation circuit, and the pulse amplitude modulation circuit is electrically connected to the pulse width modulation circuit. The pulse width modulation circuit includes a P-type pulse width compensation transistor and a first P-type control transistor, and the first P-type control transistor is electrically connected to the P-type pulse width compensation transistor. The pulse amplitude modulation circuit includes a second P-type control transistor, a first capacitor, a P-type driving transistor and a light-emitting element. The second P-type control transistor is electrically connected to the first P-type control transistor. The first capacitor is electrically connected to the second P-type control transistor.
    Type: Application
    Filed: December 8, 2022
    Publication date: May 2, 2024
    Inventors: De-Fu CHEN, Po Lun CHEN, Chun-Ta CHEN, Ta-Jen HUANG, Po-Tsun LIU, Guang-Ting ZHENG, Ting-Yi YI
  • Publication number: 20240135897
    Abstract: The present disclosure provides a scan driving circuit, which includes a pull-up output charging circuit, a pull-down discharge circuit, a pre-charge circuit, an anti-noise start-up circuit and an anti-noise pull-down discharge circuit. The pull-up output charging circuit is electrically connected to an output terminal, and the pull-down discharge circuit is electrically connected to the output terminal. The pre-charge circuit is electrically connected to the pull-up output charging circuit and the pull-down discharge circuit through a driving node. The anti-noise start-up circuit is electrically connected to the pre-charge circuit. The anti-noise pull-down discharge circuit is electrically connected to the anti-noise start-up circuit, and the anti-noise pull-down discharge circuit is electrically connected to the driving node.
    Type: Application
    Filed: December 11, 2022
    Publication date: April 25, 2024
    Inventors: De-Fu CHEN, Po Lun CHEN, Chun-Ta CHEN, Ta-Jen HUANG, Po-Tsun LIU, Guang-Ting ZHENG, Ting-Yi YI
  • Patent number: 11961489
    Abstract: The present disclosure provides a scan driving circuit, which includes a pull-up output charging circuit, a pull-down discharge circuit, a pre-charge circuit, an anti-noise start-up circuit and an anti-noise pull-down discharge circuit. The pull-up output charging circuit is electrically connected to an output terminal, and the pull-down discharge circuit is electrically connected to the output terminal. The pre-charge circuit is electrically connected to the pull-up output charging circuit and the pull-down discharge circuit through a driving node. The anti-noise start-up circuit is electrically connected to the pre-charge circuit. The anti-noise pull-down discharge circuit is electrically connected to the anti-noise start-up circuit, and the anti-noise pull-down discharge circuit is electrically connected to the driving node.
    Type: Grant
    Filed: December 11, 2022
    Date of Patent: April 16, 2024
    Assignees: Interface Technology (ChengDu) Co., Ltd., Interface Optoelectronics (ShenZhen) Co., Ltd., General Interface Solution Limited
    Inventors: De-Fu Chen, Po Lun Chen, Chun-Ta Chen, Ta-Jen Huang, Po-Tsun Liu, Guang-Ting Zheng, Ting-Yi Yi
  • Publication number: 20180292299
    Abstract: In a method of critical displacement forecast based on the deformation failure mechanism of slope, a sliding surface displacement, a calculation based on status stability factors and a slope surface displacement are determined, and applied for forecast based on a thrust-type slope deformation mechanism, a key compartment division, a relation between stress and strain mechanics properties of sliding surface of geo-material, and an analysis of evolution characteristics at different points of the sliding surface. The method provides advantages of determining deformation values at different points of a sliding surface, a slope body and a slope surface during slope failures; describing the process of a progressive failure, deformations and force changes of a slope; combining slope monitoring values to perform the stability analysis and the calculation of the magnitude of the stability factors in different deformation statuses of the slope; and assessing the durability of protective measures to the slope.
    Type: Application
    Filed: June 8, 2018
    Publication date: October 11, 2018
    Inventors: Ying-Fa LU, De-Fu LIU
  • Publication number: 20170102303
    Abstract: A method of calculating the potential sliding surface of the progressive failure of slope is provided, which is also abbreviated as a failure angle rotation method. The method performs the search calculation of the potential sliding surface of the slope to determine the potential sliding surface, under the assumption that the geological material failure satisfies the condition of the angle between the maximum shear stress surface and the minimum principal stress axis corresponding to the critical stress state being (45° +?/2), and based on the fact that the principal stress directions at different positions are rotated while the slope is applied different external loads and gravity loads. The failure path is varied with the change of the stress during the failure process to perform the solution for the potential sliding surface of the slope based on numerical calculation.
    Type: Application
    Filed: February 19, 2016
    Publication date: April 13, 2017
    Inventors: Ying-Fa LU, De-Fu LIU
  • Publication number: 20160238475
    Abstract: A method of measurement of stress and strain whole process material parameter by using method for hydrostatic pressure unloading is disclosed, which is directed to the cyclic test of loading and unloading. With the assumption that only the deviator stress generates damage to the sample, a test method of the hydrostatic pressure unloading is invented in order to calculate mechanical parameters in different stages of stress and strain. Nine mechanical parameters can be calculated in connection with hexahedral pores connecting samples in the true triaxial test. Six mechanical parameters can be calculated for non-pores connecting samples. Nine mechanical parameters can be calculated in connection with hexahedral pores connecting samples in the traditional triaxial test. Six mechanical parameters can be calculated for non-pores connecting samples. The specific expressions and test methods are provided.
    Type: Application
    Filed: July 30, 2015
    Publication date: August 18, 2016
    Inventors: YING-FA LU, DE-FU LIU
  • Publication number: 20150198513
    Abstract: In a method of critical displacement forecast based on the deformation failure mechanism of slope, a sliding surface displacement, a calculation based on status stability factors and a slope surface displacement are determined, and applied for forecast based on a thrust-type slope deformation mechanism, a key compartment division, a relation between stress and strain mechanics properties of sliding surface of geo-material, and an analysis of evolution characteristics at different points of the sliding surface. The method provides advantages of determining deformation values at different points of a sliding surface, a slope body and a slope surface during slope failures; describing the process of a progressive failure, deformations and force changes of a slope; combining slope monitoring values to perform the stability analysis and the calculation of the magnitude of the stability factors in different deformation statuses of the slope; and assessing the durability of protective measures to the slope.
    Type: Application
    Filed: January 13, 2015
    Publication date: July 16, 2015
    Inventors: Ying-Fa LU, De-Fu LIU