Patents by Inventor Chengzhong (Michael) Yu

Chengzhong (Michael) Yu 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: 20190204664
    Abstract: Disclosed is a method for manufacturing black matrix and spacer, which includes steps of: providing a base substrate and coating the base substrate with a black photoresist layer; coating a transparent photoresist layer on black photoresist layer; providing a multi-tone mask plate including a first light-transmitting area and a second light-transmitting area, in which the transparent photoresist layer and the black photoresist layer both include a first section aligning with first light-transmitting area and a second section aligning with second light-transmitting area; using the multi-tone mask plate to expose transparent photoresist layer and black photoresist layer, in which the transparent photoresist layer in the first section forms a main spacer, and the black photoresist layer in the first section forms a first black matrix, the transparent photoresist layer in the second section forms an auxiliary spacer, and the black photoresist layer in the second section forms a second black matrix.
    Type: Application
    Filed: March 19, 2018
    Publication date: July 4, 2019
    Inventor: Chengzhong YU
  • Publication number: 20190206286
    Abstract: The present disclosure provides a preparation method of a flexible display and a flexible display, and the method may include: coating an adhesive on a first surface of a first substrate to form an adhesive layer; bonding the first substrate on the second substrate by the adhesive layer on the first surface; providing a flexible display body on the second surface of the first substrate; separating the second substrate from the first substrate by a hygroscopic swelling to obtain the flexible display. By the above-mentioned method, a preparation process flow may be simplified, and the product quality may be improved.
    Type: Application
    Filed: July 11, 2018
    Publication date: July 4, 2019
    Inventor: Chengzhong Yu
  • Publication number: 20180299717
    Abstract: A VA liquid crystal display panel based on BM-less technology and a manufacturing method thereof are provided. The VA liquid crystal display panel based on BM-less technology includes a color mixture prevention zone that is formed of a stacked arrangement of red color resist and blue color resist and is used in combination with a main photo spacer and a sub photo spacer that are formed of a black material as a substitute of a black matrix. Further, the color mixture prevention zone has a portion that corresponds to the main photo spacer and the sub photo spacer and includes a recess formed therein. The main photo spacer is in engagement with a bottom of the recess to increase a height difference between the main photo spacer and the sub photo spacer and thus expanding LC margin and ensuring product yield rate.
    Type: Application
    Filed: June 22, 2018
    Publication date: October 18, 2018
    Inventor: Chengzhong Yu
  • Publication number: 20180246368
    Abstract: The disclosure provides a black matrix, a method for manufacturing the same and a liquid panel having the same. The black matrix is manufactured by the following steps. A mixture of resin compositions is coated on a substrate. After being dried, the black matrix is patterned by lithography. The mixture of resin compositions includes an adhesive resin, a photoinitiator, a small molecule monomer, a solvent, a light shielding material, an azo compound and an additive. According to the disclosure, the light shielding ability density of the black matrix is improved and the optical density of the black matrix of is increased by adding the azo compound having the property of polarization. Also, the usage of light shielding material in the black matrix is decreased and resistance of the black matrix is increased.
    Type: Application
    Filed: May 13, 2015
    Publication date: August 30, 2018
    Inventors: Chengzhong Yu, Yahui Chen, Hsiaohsien Chen, Yungjui Lee
  • Patent number: 10031374
    Abstract: The present invention provides a VA liquid crystal display panel based on BM-less technology and a manufacturing method thereof. The VA liquid crystal display panel based on BM-less technology includes a color mixture prevention zone (30) that is formed of a stacked arrangement of red color resist (41) and blue color resist (42) and is used in combination with a main photo spacer and a sub photo spacer that are formed of a black material as a substitute of a black matrix. Further, the color mixture prevention zone has a portion that corresponds to the main photo spacer (71) and the sub photo spacer (72) and includes a recess (31) formed therein. The main photo spacer (71) is in engagement with a bottom of the recess (31) to increase a height difference between the main photo spacer (71) and the sub photo spacer (72) and thus expanding LC margin and ensuring product yield rate.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: July 24, 2018
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chengzhong Yu
  • Publication number: 20180193278
    Abstract: The invention relates, in part, to a method of producing silica vesicles including under controlled conditions to thereby heavily influence the morphology and characteristics of the vesicles. The vesicles are shown to be effective as delivery agents for chemical and biological agents. They are also shown to be useful in methods of treatment and as components of an immunogenic composition.
    Type: Application
    Filed: December 19, 2014
    Publication date: July 12, 2018
    Applicant: The University of Queensland
    Inventors: Chengzhong YU, Neena MITTER, Jun ZHANG
  • Publication number: 20180052347
    Abstract: The present invention provides a VA type COA liquid crystal display panel, and the first light shielding layer having red or blue color resist material and the common electrode above the first light shielding layer are correspondingly located above the gate scan line, and the common electrode is electrically coupled to the common electrode layer on the upper substrate, and thus, the voltage difference of the upper, lower substrates is 0 at the gate scan line. Moreover, the panel appears an often black state at the gate scan line because the liquid crystal is not driven by the voltage; besides, the second light shielding layer formed by stacking up two of the red, the green and the blue color resist materials is correspondingly located above the data line; accordingly, the black matrix is eliminated, and the panel aperture ratio is high.
    Type: Application
    Filed: February 26, 2016
    Publication date: February 22, 2018
    Inventor: Chengzhong Yu
  • Publication number: 20180031888
    Abstract: The present invention provides a VA liquid crystal display panel based on BM-less technology and a manufacturing method thereof. The VA liquid crystal display panel based on BM-less technology includes a color mixture prevention zone (30) that is formed of a stacked arrangement of red color resist (41) and blue color resist (42) and is used in combination with a main photo spacer and a sub photo spacer that are formed of a black material as a substitute of a black matrix. Further, the color mixture prevention zone has a portion that corresponds to the main photo spacer (71) and the sub photo spacer (72) and includes a recess (31) formed therein. The main photo spacer (71) is in engagement with a bottom of the recess (31) to increase a height difference between the main photo spacer (71) and the sub photo spacer (72) and thus expanding LC margin and ensuring product yield rate.
    Type: Application
    Filed: December 29, 2015
    Publication date: February 1, 2018
    Inventor: Chengzhong Yu
  • Publication number: 20170153516
    Abstract: The present invention provides a pixel structure and a liquid crystal display panel. Areas of the red sub pixel (R) and the green sub pixel (G) are set to be equal, and an area of the blue sub pixel (B) is smaller than the area of the red sub pixel (R) or the green sub pixel (G), and an area of the white sub pixel (W) is not less than the area of the red sub pixel (R) or the green sub pixel (G). By adjusting the area ratio of the red sub pixel (R), the green sub pixel (G), the blue sub pixel (B) and the white sub pixel (W) to reduce the area of the blue sub pixel (B) and relatively enlarge the area of the white sub pixel (W), the white dot coordinate in the RGBW liquid crystal display panel can be adjusted.
    Type: Application
    Filed: October 12, 2015
    Publication date: June 1, 2017
    Inventors: Chengzhong Yu, Min Tang, Yungjui Lee
  • Patent number: 9587963
    Abstract: A brushless linear rotary transformer apparatus for determining angular position and velocity of a rotor includes a rotor, a stator, a primary coil winding, pairs of secondary coil windings, bearings, an excitation power supply, and a signal receiving and processing system. The primary coil winding is wrapped around a hollow cylinder body on one end of the stator. One end of the rotor shaft is arranged in the hollow cylinder body. Another ends of the rotor shaft and the stator are connected by a bearing. Pairs of secondary coil windings are embedded in the stator and on the inner side of the stator. An alternating magnetic field is generated by the excitation power supply through the primary coil winding. The amplitudes of the induced electromotive force at the ends of the secondary coil windings are linearly proportional to the angular position of the rotor.
    Type: Grant
    Filed: April 7, 2013
    Date of Patent: March 7, 2017
    Inventor: Chengzhong Tan
  • Publication number: 20160342042
    Abstract: The present invention provides a pixel structure and a liquid crystal display panel including the pixel structure. The pixel structure includes a plurality of pixel units (1) arranged in an array. Each of the pixel units (1) includes a red sub-pixel (11), a green sub-pixel (12), and a blue sub-pixel (13) that are arranged in the form of a window sash. The red sub-pixel (11) and the blue sub-pixel (13) are arranged in a row in a vertical direction. The green sub-pixel (12) is individually arranged in a row. A surface area of the green sub-pixel (12) is greater than or equal to the sum of surface areas of the red sub-pixel (11) and the blue sub-pixel (13). A black matrix (4) is arranged along outer circumferences of the red sub-pixel (11), the green sub-pixel (12), and the blue sub-pixel (13). The pixel structure reduces the area occupied by the black matrix (4), expands the surface area of the green sub-pixel (12), increases aperture ratio and light transmittance, and enhances displaying performance.
    Type: Application
    Filed: February 6, 2015
    Publication date: November 24, 2016
    Applicant: Shenzhen China Star Optoelectronics Technology Co. Ltd.
    Inventors: Chengzhong YU, Yahui CHEN, Hsiaohsien CHEN, Yungjui LEE
  • Publication number: 20150241248
    Abstract: A brushless linear rotary transformer apparatus for determining angular position and velocity of a rotor includes a rotor, a stator, a primary coil winding, pairs of secondary coil windings, bearings, an excitation power supply, and a signal receiving and processing system. The primary coil winding is wrapped around a hollow cylinder body on one end of the stator. One end of the rotor shaft is arranged in the hollow cylinder body. Another ends of the rotor shaft and the stator are connected by a bearing. Pairs of secondary coil windings are embedded in the stator and on the inner side of the stator. An alternating magnetic field is produced by the excitation power supply through the primary coil winding, and the induced electromotive forces at the ends of the secondary coil windings are associated with the angular position of the rotor.
    Type: Application
    Filed: April 7, 2013
    Publication date: August 27, 2015
    Inventor: Chengzhong Tan
  • Patent number: 8949546
    Abstract: Embodiments include a local cache management system that is configured to be coupled to a local cache and that includes an index engine configured to store fingerprints of message segments stored in the local cache and a redundancy management engine coupled to the index engine. The redundancy management engine includes an adaptive emitter configured to receive a message segment to be transmitted to a remote device, determine expected latency costs of a plurality of transmission algorithms, and select a transmission algorithm, such as by selecting the lowest expected latency cost. The adaptive emitter is also configured to determine whether the message segment is stored within a remote cache management system associated with the remote device, and transmit the message segment through a network to the remote cache management system using the selected transmission algorithm upon a determination that the message segment is not stored within the remote cache management system.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 3, 2015
    Assignee: VMware, Inc.
    Inventors: Liang Cui, Chengzhong Liu, Zhifeng Xia
  • Publication number: 20130326156
    Abstract: Embodiments include a local cache management system that is configured to be coupled to a local cache and that includes an index engine configured to store fingerprints of message segments stored in the local cache and a redundancy management engine coupled to the index engine. The redundancy management engine includes an adaptive emitter configured to receive a message segment to be transmitted to a remote device, determine expected latency costs of a plurality of transmission algorithms, and select a transmission algorithm, such as by selecting the lowest expected latency cost. The adaptive emitter is also configured to determine whether the message segment is stored within a remote cache management system associated with the remote device, and transmit the message segment through a network to the remote cache management system using the selected transmission algorithm upon a determination that the message segment is not stored within the remote cache management system.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicant: VMWARE, INC.
    Inventors: Liang CUI, Chengzhong LIU, Zhifeng XIA
  • Patent number: 8235139
    Abstract: This invention disclosed a power tool comprising housing, motor in the housing, switch fixed on the housing used to connect motor and power, output shaft connecting with operator and rotating in single direction in company with the motor driving, and locking device contained in the housing. Power tool has self-locking mechanism which can lock the output shaft no need additional tools or holding force. The locking act can be easier and safer.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: August 7, 2012
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventors: Chengzhong Chen, Hongfeng Zhong
  • Patent number: 7900715
    Abstract: The present invention has disclosed a variable speed tool and a variable speed control method. The tool includes a switch; a gearbox housing; a motor; an outputting shaft; a multistage transmitting gear train and a gearshift ring which are mated with the motor and the outputting shaft, the gearshift ring having inner teeth; a gearshift fork mated with the gearshift ring; a tension spring arranged between the gearbox housing and the gearshift fork; and a torque sensing ring provided with a sliding groove in which the gearshift fork is movably disposed. When the load of the outputting shaft has reached to a predetermined value, the torque sensing ring makes the gearshift fork move axially in the sliding groove under the action of the tension spring, thus bringing the gearshift ring to move axially. The variable speed tool of the present invention may automatically adjust the rotating speed and the torque of the outputting shaft according to a variation of the load torque.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: March 8, 2011
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventor: Chengzhong Chen
  • Patent number: 7882899
    Abstract: A power tool comprising a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The gear transmission mechanism has a high speed position and a low speed position. The control system is coupled to the gear transmission mechanism for detecting an operating characteristic of the power tool to actuate a ring gear to automatically move from the high speed position to the low speed position and to reduce the rotational speed of the ring gear when the operating characteristic exceeding a predetermined value.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: February 8, 2011
    Assignee: Positec Power Tools (Suzhou) Co., Ltd
    Inventors: Gianni Borinato, Kelvin Wong, Shisong Zhang, Paolo Andriolo, Warren Brown, Hongfeng Zhong, Fangshi Liu, Chengzhong Chen
  • Patent number: 7882900
    Abstract: A power tool includes a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The power tool includes a signal generator and a control system electrically coupled to the signal generator and operatively engaged with the gear transmission mechanism such that when the signal generator is manually activated, an electric signal is generated and transmitted to the control system to cause the gear transmission mechanism to vary the gear reduction ratio.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: February 8, 2011
    Assignee: Positec Power Tools (Suzhou) Co., Ltd
    Inventors: Gianni Borinato, Kelvin Wong, Shisong Zhang, Paolo Andriolo, Warren Brown, Hongfeng Zhong, Fangshi Liu, Chengzhong Chen
  • Publication number: 20100078187
    Abstract: This invention disclosed a power tool comprising housing, motor in the housing, switch fixed on the housing used to connect motor and power, output shaft connecting with operator and rotating in single direction in company with the motor driving, and locking device contained in the housing. Power tool has self-locking mechanism which can lock the output shaft no need additional tools or holding force. The locking act can be easier and safer.
    Type: Application
    Filed: December 18, 2007
    Publication date: April 1, 2010
    Inventors: Chengzhong Chen, Hongfeng Zhong
  • Publication number: 20090277658
    Abstract: The present invention has disclosed a variable speed tool and a variable speed control method. The tool includes a switch; a gearbox housing; a motor; an outputting shaft; a multistage transmitting gear train and a gearshift ring which are mated with the motor and the outputting shaft, the gearshift ring having inner teeth; a gearshift fork mated with the gearshift ring; a tension spring arranged between the gearbox housing and the gearshift fork; and a torque sensing ring provided with a sliding groove in which the gearshift fork is movably disposed. When the load of the outputting shaft has reached to a predetermined value, the torque sensing ring makes the gearshift fork move axially in the sliding groove under the action of the tension spring, thus bringing the gearshift ring to move axially. The variable speed tool of the present invention may automatically adjust the rotating speed and the torque of the outputting shaft according to a variation of the load torque.
    Type: Application
    Filed: June 15, 2007
    Publication date: November 12, 2009
    Applicant: POSITEC POWER TOOLS (SUZHOU) CO., LTD.
    Inventor: Chengzhong Chen