中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

21 records (took 0.017 seconds)

    TFT pixel circuit for OLED external compensation using an adjusted data voltage for component compensation
    1.
    发明授权
    TFT pixel circuit for OLED external compensation using an adjusted data voltage for component compensation 有权

    公开(公告)号：US10984712B2

    公开(公告)日：2021-04-20

    申请号：US16214437

    申请日：2018-12-10

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Michael James Brownlow ,  Tong Lu

    IPC: G09G3/30 ,  G09G3/3233 ,  G09G3/3275 ,  G09G3/3266

    Abstract: A display system includes a pixel circuit and an external compensation system that is operable with the pixel circuit to compensate for differences in a property of the drive transistor and/or light-emitting device. The pixel circuit includes a drive transistor configured to control an amount of current to a light-emitting device; a second transistor having a first terminal connected to the gate of the drive transistor and a second terminal connected to a data voltage input that is supplied by the external compensation system, and a gate of the second transistor is connected to a first control signal; a third transistor having a first terminal connected to a second terminal of the drive transistor and a second terminal connected to a second voltage supply input that is supplied from the external compensation system, wherein a current flow from the second voltage supply input is measured by the external compensation system, and wherein a gate of the third transistor is connected to a second control signal; and a fourth transistor having a first terminal connected to the second terminal of the drive transistor and a second terminal connected to a third voltage supply input, wherein a gate of the fourth transistor is connected to a third control signal. The external voltage compensation system is configured to adjust the data voltage input based on the measured current flow to compensate for a variation in a property of the drive transistor and/or the light-emitting device.

    TFT PIXEL THRESHOLD VOLTAGE COMPENSATION CIRCUIT WITH SHORT DATA PROGRAMMING TIME AND LOW FRAME RATE
    3.
    发明申请
    TFT PIXEL THRESHOLD VOLTAGE COMPENSATION CIRCUIT WITH SHORT DATA PROGRAMMING TIME AND LOW FRAME RATE 有权

    公开(公告)号：US20210020104A1

    公开(公告)日：2021-01-21

    申请号：US16515370

    申请日：2019-07-18

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Michael James Brownlow ,  Tim Michael Smeeton

    IPC: G09G3/3258 ,  G09G3/3291 ,  G09G3/3266

    Abstract: A pixel circuit is operable in initialization, data programming, a threshold compensation, and emission phases. The pixel circuit includes a drive transistor configured to control an amount of current to a light-emitting device during the emission phase depending upon a voltage applied to a gate of the drive transistor. A first ultra-low leakage oxide transistor is employed as a data switch device, and the data voltage is applied to the gate of the drive transistor through the first ultra-low leakage oxide transistor during the data programming phase. A second ultra-low leakage oxide transistor is employed as an initialization switch device. The second ultra-low leakage oxide transistor is in an on state during the initialization, data programming, and threshold compensation phases, and the initialization voltage is applied to the gate of the drive transistor through the second ultra-low leakage oxide transistor during the initialization phase.

    PIXEL CIRCUIT USING DIRECT CHARGING AND THAT PERFORMS LIGHT-EMITTING DEVICE COMPENSATION
    4.
    发明申请
    PIXEL CIRCUIT USING DIRECT CHARGING AND THAT PERFORMS LIGHT-EMITTING DEVICE COMPENSATION 审中-公开

    公开(公告)号：US20190304370A1

    公开(公告)日：2019-10-03

    申请号：US15937965

    申请日：2018-03-28

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Michael James Brownlow ,  Tim Michael Smeeton

    IPC: G09G3/3258

    Abstract: A display system includes a display panel comprising a plurality of pixel circuits, and a measurement and data processing unit that is external to the display panel. Each pixel circuit includes a light-emitting device having a first terminal connected to a first voltage supply and a second terminal opposite from the first terminal; a first transistor connected between a data voltage supply line from the measurement and data processing unit and the second terminal of the light emitting device; and a second transistor connected between the second terminal of the light-emitting device and a sample line to the measurement and data processing unit. The measurement and data processing unit is configured to sample a measured voltage at the second terminal of the light-emitting device through the sample line and to output a data voltage to the light-emitting device based on the measured voltage to compensate variations in properties of the light-emitting device. Each pixel circuit further may include a storage capacitor connected between the second terminal of the light-emitting device and a second voltage supply, wherein the storage capacitor discharges through the light-emitting device when the data voltage is disconnected from the pixel circuit.

    TFT COMPENSATION CIRCUIT FOR DISPLAY DEVICE USING REFERENCE CURRENT
    5.
    发明申请
    TFT COMPENSATION CIRCUIT FOR DISPLAY DEVICE USING REFERENCE CURRENT 审中-公开

    公开(公告)号：US20190295467A1

    公开(公告)日：2019-09-26

    申请号：US15933474

    申请日：2018-03-23

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Christopher James Brown ,  Michael James Brownlow ,  Tim Michael Smeeton

    IPC: G09G3/3233 ,  G09G3/3291

    Abstract: A pixel circuit for a display device includes a drive transistor configured to control an amount of current to a light-emitting device during an emission phase depending upon a voltage applied to a gate of the drive transistor; a second transistor connected to the gate of the drive transistor, wherein the second transistor is in an on state during a combined programming and compensation phase and in an off state during the emission phase, and when the second transistor is in an on state the drive transistor becomes diode-connected such that a gate and a second terminal of the drive transistor are connected through the second transistor; a third transistor connected to the second terminal of the drive transistor, wherein the third transistor is in an on state during the combined programming and compensation phase to permit a reference current to be applied through the drive transistor, and is in an off state during the emission phase to remove the reference current; and a capacitor having a first plate that is connected to the gate of the drive transistor and a second plate that is connectable to a data voltage during the combined programming and compensation phase. A threshold voltage and/or a carrier mobility of the drive transistor is compensated by application of the reference current during the combined programming and compensation phase.

    TFT pixel threshold voltage compensation circuit with a source follower
    7.
    发明授权
    TFT pixel threshold voltage compensation circuit with a source follower 有权

    公开(公告)号：US10885843B1

    公开(公告)日：2021-01-05

    申请号：US16740763

    申请日：2020-01-13

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Michael James Brownlow ,  Tim Michael Smeeton

    IPC: G09G3/325 ,  G09G3/3266 ,  G09G3/3275

    Abstract: A pixel circuit for a display device operable in an initialization phase, a compensation phase, a data programming phase, and an emission phase, whereby the one horizontal time is minimized while maintaining accurate compensation of the threshold voltages of the drive transistors, and further accounting for any variations in the voltage supplies. The pixel circuit includes a first drive transistor configured to control an amount of current to a light-emitting device during an emission phase depending upon voltages applied to a gate and a first terminal of the first drive transistor; and a second drive transistor that is configured as a source follower, wherein a first terminal of the second drive transistor is connected to a first power supply line and a second terminal of the second drive transistor is connected to a first terminal of the first drive transistor. The first drive transistor is one of a p-type or n-type transistor and the second drive transistor is the other of a p-type or n-type transistor. A light-emitting device is electrically connected at a first terminal to a second terminal of the first drive transistor during the emission phase and at a second terminal to a second power supply line.

    TFT pixel threshold voltage compensation circuit with short one horizontal time
    8.
    发明授权
    TFT pixel threshold voltage compensation circuit with short one horizontal time 有权

    公开(公告)号：US10706782B2

    公开(公告)日：2020-07-07

    申请号：US16171718

    申请日：2018-10-26

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Michael James Brownlow

    IPC: G09G3/3258 ,  H01L27/12 ,  G09G3/3233

    Abstract: A pixel circuit includes a drive transistor that controls an amount of current to a light-emitting device, and a second transistor connected to the gate of the drive transistor and a second terminal of the drive transistor, such that when the second transistor is in an on state the drive transistor becomes diode-connected. A threshold voltage of the drive transistor is compensated during a compensation phase while the drive transistor is diode connected. The light-emitting device is connected between the drive transistor and at a second node to a first voltage input. The pixel circuit further includes a storage capacitor having a first plate connected to the gate of the drive transistor, and a programming capacitor having a first plate connected to a second plate of the storage capacitor, and a second plate of the programming capacitor is electrically connected to a data voltage input during a data programming phase. The second plate of the storage capacitor and the first plate of the programming capacitor are connectable to a reference voltage to perform the compensation phase independently of the programming phase, and the storage capacitor and the programming capacitor are series connected during the emission phase.

    DROPLET MICROFLUIDIC DEVICE AND METHODS OF SENSING THE RESULTS OF AN ASSAY THEREIN
    9.
    发明申请
    DROPLET MICROFLUIDIC DEVICE AND METHODS OF SENSING THE RESULTS OF AN ASSAY THEREIN 审中-公开
    滴眼液微流体装置及其测定结果的方法

    公开(公告)号：US20170056887A1

    公开(公告)日：2017-03-02

    申请号：US14838797

    申请日：2015-08-28

    Applicant: Sharp Kabushiki Kaisha ,  ASSOCIATES OF CAPE COD INCORPORATED

    Inventor： Benjamin James Hadwen ,  Adrian Marc Simon Jacobs ,  Jason Roderick Hector ,  Michael James Brownlow ,  Masahiro Adachi ,  Alison Mary Skinner ,  Mark Childs

    IPC: B01L3/00

    CPC classification number: B01L3/502792 ,  B01L2300/0645 ,  B01L2300/0816 ,  B01L2300/0887 ,  B01L2400/0427 ,  G01N33/579

    Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

    Abstract translation: 确定微流体装置中的测定结果的方法包括以下步骤：将样品液滴分配到微流体装置的电极阵列的第一部分上; 将试剂液滴分配到微流体装置的电极阵列的第二部分上; 控制施加到电极阵列的致动电压以将样品液滴和试剂液滴混合成产物液滴; 感测产品液滴的动态特性; 以及基于所感测的动态特性来确定样品液滴的测定。 动态特性是影响产品液滴在电极阵列上的传输特性的产物液滴的物理性质。 产品液滴的示例动态特性包括基于液滴性质的可移动状态，可分离状态和粘度。 该方法可用于进行变形细胞裂解物（LAL）测定。

    TFT pixel threshold voltage compensation circuit with short programming time
    10.
    发明授权
    TFT pixel threshold voltage compensation circuit with short programming time 有权

    公开(公告)号：US10783830B1

    公开(公告)日：2020-09-22

    申请号：US16411461

    申请日：2019-05-14

    Applicant: Sharp Kabushiki Kaisha

    Inventor： Tong Lu ,  Michael James Brownlow

    IPC: G09G3/3258 ,  H01L27/32

    Abstract: A pixel circuit has enhanced performance by minimizing noise effects from the data and reference voltage lines. To prevent data line noise from interfering with the drive transistor gate voltage during emission, a triple gate isolation is used between the data voltage line and the gate of the drive transistor by which three transistors are connected between the data voltage line and the gate of the drive transistor. To further improve the isolation, one of the middle nodes of the triple gate farthest from the data voltage line is connected to one floating node that is connectable to a reference voltage during the threshold compensation phase. A first capacitor is used for the threshold compensation, and a second capacitor is used to scale the data voltage during programming. The threshold compensation and data programming operations are thereby independent of each other to minimize programming time.

Patent Agency Ranking