WO2019223088A1 - 一种像素电路及其驱动方法、显示面板 - Google Patents

一种像素电路及其驱动方法、显示面板 Download PDF

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WO2019223088A1
WO2019223088A1 PCT/CN2018/096050 CN2018096050W WO2019223088A1 WO 2019223088 A1 WO2019223088 A1 WO 2019223088A1 CN 2018096050 W CN2018096050 W CN 2018096050W WO 2019223088 A1 WO2019223088 A1 WO 2019223088A1
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pixel circuit
emitting element
capacitor
circuit
voltage signal
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PCT/CN2018/096050
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English (en)
French (fr)
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林建宏
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武汉华星光电半导体显示技术有限公司
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Priority to US16/255,442 priority Critical patent/US20190362669A1/en
Publication of WO2019223088A1 publication Critical patent/WO2019223088A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix

Definitions

  • the present invention relates to the technical field of organic light emitting displays, and in particular, to a pixel circuit, a driving method thereof, and a display panel.
  • AMOLED Active Matrix / Organic Light Emitting Diode
  • the pixel circuit adopts a 3T1C design and includes a switching transistor STFT, a driving transistor DTFT, a control transistor ETFT, and a storage capacitor Cst.
  • the switching transistor STFT is used to control whether the data signal enters
  • the driving transistor DTFT is used to control whether the driving current of the organic light emitting diode OLED flows according to the input condition of the data signal
  • the storage capacitor Cst is used to provide a sustain voltage for the driving transistor DTFT to control
  • the transistor ETFT controls whether a driving current flows through the organic light emitting diode OLED to determine whether the organic light emitting diode OLED emits light.
  • the technical problem to be solved by the embodiments of the present invention is to provide a pixel circuit, a driving method thereof, and a display panel, which can perfectly integrate the touch function, that is, to solve the requirements of the existing display panel thickness and bending, and reduce the process production. Difficulty can also eliminate the need for outsourced touch panels.
  • an embodiment of the present invention provides a pixel circuit, which includes a reference pixel circuit, a touch circuit, and a switch;
  • One end of the reference pixel circuit is connected to a DC high-voltage signal, and the other end is connected to a positive electrode of an electronic light-emitting element and connected to the DC low-voltage signal via the negative electrode of the electronic light-emitting element, for driving or turning off the electronic light-emitting element to emit light;
  • the touch circuit is connected to a certain connection between the negative electrode of the electronic light emitting element and the DC low voltage signal through the switch, and is configured to determine whether the reference pixel circuit drives the electronic light emitting element to emit light. Correspondingly, the on / off state of the switch is selected to determine whether to work or not.
  • the reference pixel circuit drives the electronic light emitting element to emit light, and the switch is in an off state, so that the touch circuit cannot work because it does not receive the DC low voltage signal;
  • the switch When the reference pixel circuit stops emitting light from the electronic light-emitting element, the switch is in a closed state, so that the touch circuit can receive the DC low-voltage signal to work, sense a trigger action, and output a touch signal.
  • the touch circuit includes a sensing capacitor, a coupling capacitor, an operational capacitor, and an operational amplifier.
  • One end of the sensing capacitor is provided with a touch sensing line, and the other end is connected to the switch, one end of the coupling capacitor, one end of the operational capacitor, and one input end of the operational amplifier;
  • the other end of the coupling capacitor is grounded
  • the other end of the operational capacitor is connected to the output end of the operational amplifier, and forms a negative feedback amplifier circuit with the operational amplifier;
  • the other input terminal of the operational amplifier is connected to an internal working voltage signal.
  • the reference pixel circuit includes a switching transistor, a driving transistor, a control transistor, and a storage capacitor.
  • the gate of the switching transistor is connected to a scanning signal, the drain is connected to a data signal, and the source is connected to one end of the capacitor and the gate of the driving transistor, respectively;
  • a drain of the driving transistor is connected to the DC high voltage signal, and a source is connected to a drain of the control transistor;
  • a gate of the control transistor is connected to a control signal, and a source is connected to a positive electrode of the electronic light emitting element;
  • the other end of the storage circuit is connected to the DC high-voltage signal.
  • the electronic light emitting element is an organic light emitting diode.
  • an embodiment of the present invention also provides a driving method of a pixel circuit, which is implemented in a pixel circuit including a reference pixel circuit, a touch circuit and a switch; one end of the reference pixel circuit is connected with a DC high voltage signal, The other end is connected to the positive electrode of an electronic light emitting element and connected to the DC low voltage signal through the negative electrode of the electronic light emitting element; the touch circuit is connected to the negative electrode of the electronic light emitting element and the DC low voltage signal through the switch.
  • the method includes the following steps:
  • the current working state of the reference pixel circuit is driving the electronic light emitting element to turn light on or off the light emitting element;
  • the on / off state of the switch is correspondingly selected to determine whether the touch circuit is working or not.
  • the specific steps of determining whether the touch circuit is working or not working according to the current working state of the reference pixel circuit and correspondingly selecting the closed state of the switch include:
  • the switch When the current working state of the reference pixel circuit is driving the electronic light emitting element to emit light, the switch is correspondingly selected to be in an off state, and it is determined that the touch circuit is not working.
  • the specific step of determining whether the touch circuit is working or not working according to the current working state of the reference pixel circuit and correspondingly selecting the closed state of the switch further includes:
  • the switch When the current working state of the reference pixel circuit is to turn off the light emission of the electronic light emitting element, the switch is correspondingly selected to be in a closed state to determine that the touch circuit is working.
  • the touch circuit includes a sensing capacitor, a coupling capacitor, an operational capacitor, and an operational amplifier.
  • One end of the sensing capacitor is provided with a touch sensing line, and the other end is connected to the switch, one end of the coupling capacitor, one end of the operational capacitor, and one input end of the operational amplifier;
  • the other end of the coupling capacitor is grounded
  • the other end of the operational capacitor is connected to the output end of the operational amplifier, and forms a negative feedback amplifier circuit with the operational amplifier;
  • the other input terminal of the operational amplifier is connected to an internal working voltage signal.
  • the reference pixel circuit includes a switching transistor, a driving transistor, a control transistor, and a storage capacitor; wherein,
  • the gate of the switching transistor is connected to a scanning signal, the drain is connected to a data signal, and the source is connected to one end of the capacitor and the gate of the driving transistor, respectively;
  • a drain of the driving transistor is connected to the DC high voltage signal, and a source is connected to a drain of the control transistor;
  • a gate of the control transistor is connected to a control signal, and a source is connected to a positive electrode of the electronic light emitting element;
  • the other end of the storage circuit is connected to the DC high-voltage signal.
  • the electronic light emitting element is an organic light emitting diode.
  • an embodiment of the present invention further provides a display panel including a pixel circuit; the pixel circuit includes a reference pixel circuit, a touch circuit, and a switch; wherein,
  • One end of the reference pixel circuit is connected to a DC high-voltage signal, and the other end is connected to a positive electrode of an electronic light-emitting element and connected to the DC low-voltage signal via the negative electrode of the electronic light-emitting element, for driving or turning off the electronic light-emitting element to emit light;
  • the touch circuit is connected to a certain connection between the negative electrode of the electronic light emitting element and the DC low voltage signal through the switch, and is configured to determine whether the reference pixel circuit drives the electronic light emitting element to emit light. Correspondingly, the on / off state of the switch is selected to determine whether to work or not.
  • the reference pixel circuit drives the electronic light emitting element to emit light, and the switch is in an off state, so that the touch circuit cannot work because it does not receive the DC low voltage signal;
  • the switch When the reference pixel circuit stops emitting light from the electronic light-emitting element, the switch is in a closed state, so that the touch circuit can receive the DC low-voltage signal to work, sense a trigger action, and output a touch signal.
  • the touch circuit includes a sensing capacitor, a coupling capacitor, an operational capacitor, and an operational amplifier.
  • One end of the sensing capacitor is provided with a touch sensing line, and the other end is connected to the switch, one end of the coupling capacitor, one end of the operational capacitor, and one input end of the operational amplifier;
  • the other end of the coupling capacitor is grounded
  • the other end of the operational capacitor is connected to the output end of the operational amplifier, and forms a negative feedback amplifier circuit with the operational amplifier;
  • the other input terminal of the operational amplifier is connected to an internal working voltage signal.
  • the reference pixel circuit includes a switching transistor, a driving transistor, a control transistor, and a storage capacitor.
  • the gate of the switching transistor is connected to a scanning signal, the drain is connected to a data signal, and the source is connected to one end of the capacitor and the gate of the driving transistor, respectively;
  • a drain of the driving transistor is connected to the DC high voltage signal, and a source is connected to a drain of the control transistor;
  • a gate of the control transistor is connected to a control signal, and a source is connected to a positive electrode of the electronic light emitting element;
  • the other end of the storage circuit is connected to the DC high-voltage signal.
  • the electronic light emitting element is an organic light emitting diode.
  • the pixel circuit in the present invention integrates a reference pixel circuit for driving off an electronic light emitting element to emit light and responds according to whether the reference pixel circuit drives the electronic light emitting element to emit light.
  • FIG. 1 is a schematic diagram of a physical circuit connection of a pixel circuit in the prior art
  • FIG. 2 is a schematic diagram of a system structure of a pixel circuit according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a physical connection of a pixel circuit provided in Embodiment 1 of the present invention.
  • FIG. 4 is a working principle diagram of FIG. 3;
  • FIG. 5 is another working principle diagram of FIG. 3;
  • FIG. 6 is a flowchart of a driving method of a pixel circuit according to a second embodiment of the present invention.
  • a pixel circuit provided in Embodiment 1 of the present invention includes a reference pixel circuit 1, a touch circuit 2 and a switch K;
  • One end of the reference pixel circuit 1 is connected to a DC high-voltage signal VDD, and the other end is connected to the positive electrode (+) of an electronic light-emitting element L and connected to the DC low-voltage signal VSS through the negative electrode (-) of the electronic light-emitting element L for driving or cutting off electron
  • the light emitting element L emits light;
  • the touch circuit 2 is connected to a certain connection O between the negative electrode (-) of the electronic light-emitting element L and the DC low-voltage signal VSS through the switch K, and is used to select correspondingly based on whether the reference pixel circuit 1 drives the electronic light-emitting element L to emit light.
  • the open / closed state of the switch K determines whether it is working or not.
  • the switch K by opening and closing the switch K, the interference (including current, signal, and other interference) of the reference pixel circuit 1 to the touch circuit 2 can be avoided. Therefore, when the reference pixel circuit 1 drives the electronic light-emitting element L to emit light, The switch K is set to the off state, so that the touch circuit 2 cannot work because it does not receive the DC low-voltage signal VSS; and when the reference pixel circuit 1 turns off the light emitting element L, the switch K is set to the closed state, so that the touch The control circuit 2 can receive the DC low-voltage signal VSS and work, and induce a trigger action and output a touch signal.
  • the electronic light emitting element L is an organic light emitting diode or other light emitting components.
  • the touch circuit 2 includes an induction capacitor Cf, a coupling capacitor Cg, an operational capacitor Cb, and an operational amplifier OP;
  • One end of the sensing capacitor Cf is provided with a touch sensing line, and the other end is connected to the switch K, one end of the coupling capacitor Cg, one end of the operational capacitor Cb, and one input end of the operational amplifier OP; the other end of the coupling capacitor Cg is grounded;
  • the other end of the operational capacitor Cb is connected to the output terminal of the operational amplifier OP, and forms a negative feedback amplifier circuit with the operational amplifier OP;
  • the other input terminal of the operational amplifier OP is connected to an internal working voltage signal SWS.
  • the reference pixel circuit 1 includes a switching transistor T1, a driving transistor T2, a control transistor T3, and a storage capacitor Cs;
  • the gate of the switching transistor T1 is connected to a scan signal scan, the drain is connected to a data signal data, and the source is connected to one end of the capacitor Cs and the gate of the driving transistor T2, respectively;
  • the drain of the driving transistor T2 is connected to the DC high-voltage signal VDD, and the source is connected to the drain of the control transistor T3;
  • the gate of the control transistor T3 is connected to a control signal EM, and the source is connected to the positive electrode (+) of the electronic light-emitting element L;
  • the other end of the storage circuit Cs is connected to a DC high-voltage signal VDD.
  • a high-level data signal data enters the gate of the driving transistor T2 through the switching transistor T1, and the driving transistor T2 is turned on so that the DC high-voltage signal VDD flows into
  • the control transistor T3 is turned on so that the electronic light-emitting element L emits light.
  • the switch K is turned off, and the operational amplifier OP in the touch circuit 2 cannot work because it cannot obtain the DC low-voltage signal VSS (as shown in FIG. 4).
  • the flat data signal data cannot be turned on by the gate of the driving transistor T2 because the switching transistor T1 is turned off, so that the control transistor T3 is turned off.
  • the operational amplifier OP in the touch circuit 2 can obtain a DC low-voltage signal VSS to start the work, sense a trigger action, and output a touch signal (as shown in FIG. 5).
  • the second embodiment of the present invention also provides a driving method of the pixel circuit, which is implemented on the pixel circuit in the first embodiment of the present invention, including the following: step:
  • Step S1 Determine a current working state of the reference pixel circuit to the electronic light emitting element; the current working state of the reference pixel circuit is to drive the electronic light emitting element to turn on or turn off the light emitting element;
  • the specific process is that the current working state of the reference pixel circuit is determined by determining whether the reference pixel circuit drives the electronic light emitting element to emit light. If the light is emitted, the driving current is provided, and if the light is not emitted, the driving current is turned off.
  • Step S2 Determine whether the touch circuit is working or not according to the current working state of the reference pixel circuit and corresponding to the open / close state of the selection switch.
  • the specific process is that when the current working state of the reference pixel circuit is driving the electronic light emitting element to emit light, the corresponding selection switch is in an off state to determine that the touch circuit is not working; or when the current working state of the reference pixel circuit is to turn off the electronic light emitting element to emit light When the corresponding selection switch is closed, it is determined that the touch circuit works.
  • the third embodiment of the present invention further provides a display panel including the pixel circuit in the first embodiment of the present invention, and has the same pixel circuit as the pixel circuit in the first embodiment of the present invention. Structure and connection relationship. Therefore, please refer to related content in Embodiment 1 of the present invention for details, and details are not described herein again.
  • the implementation of the embodiment of the present invention has the following beneficial effects:
  • the pixel circuit in the present invention integrates a reference pixel circuit for driving off the light-emitting of the electronic light-emitting element and determines whether the reference pixel circuit is
  • the electronic light-emitting element is driven to emit light to determine whether the touch switch circuit is active or inactive according to the open / close state of the selection switch, thereby perfectly integrating a touch circuit with a touch function based on the traditional pixel circuit, which solves the existing display
  • the need for panel thickness and bending reduces the difficulty of crafting and eliminates the need for outsourced touch panels.

Abstract

一种像素电路，包括基准像素电路（1）、触控电路（2）以及开关（K）；其中，基准像素电路（1）的一端连接直流高压信号（VDD），另一端连接一电子发光元件（L）的正极后并经电子发光元件（L）的负极与直流低压信号（VSS）相连，用于驱动或截止电子发光元件（L）发光；触控电路（2）通过开关（K）连接于电子发光元件（L）的负极与直流低压信号（VSS）之间的某一连接处（O），用于根据判定基准像素电路（1）是否驱动所述电子发光元件（L）发光来对应选择开关（K）的开闭状态，确定工作或不工作。该像素电路能集成触控功能，既解决了现有显示面板厚度及弯折的需求，降低了工艺制作难度，还可省去外购触控面板的需求。

Description

一种像素电路及其驱动方法、显示面板
本申请要求于2018年5月23日提交中国专利局、申请号为201810502180.1、发明名称为“一种像素电路及其驱动方法、显示面板”的中国专利申请的优先权，上述专利的全部内容通过引用结合在本申请中。
技术领域
本发明涉及有机发光显示技术领域，尤其涉及一种像素电路及其驱动方法、显示面板。
背景技术
相比传统的液晶面板，AMOLED(Active Matrix/Organic Light Emitting Diode,有源矩阵有机发光二极管)面板具有反应速度更快、对比度更高、视角更广等特点，因此，AMOLED得到了显示技术开发商日益广泛的关注。
AMOLED由像素电路驱动发光。如图1所示，该像素电路采用3T1C设计，包括一个开关晶体管STFT、一个驱动晶体管DTFT、一个控制晶体管ETFT和一个存储电容Cst。其中，开关晶体管STFT用以控制数据信号是否进入，驱动晶体管DTFT用以根据数据信号的输入情况来控制有机发光二极管OLED的驱动电流是否流入，存储电容Cst用以为驱动晶体管DTFT提供维持电压，而控制晶体管ETFT控制驱动电流是否流过有机发光二极管OLED来确定有机发光二极管OLED是否发光。
近年来，触控功能在各种显示面板尤其是移动显示中的应用越来越广，几乎成了智能手机的标准配置。然而，现有的显示面板大多数都使用外挂触控面板，不仅制作工艺复杂，在弯折需求上需开发新的材料，使得成本较高，还增加了厚度。
发明内容
本发明实施例所要解决的技术问题在于，提供一种像素电路及其驱动方法、显示面板，能完美的集成触控功能，即解决了现有显示面板厚度及弯折的需求，降低了工艺制作难度，还可省去外购触控面板的需求。
为了解决上述技术问题，本发明实施例提供了一种像素电路，包括基准像素电路、触控电路以及开关；其中，
所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连，用于驱动或截止所述电子发光元件发光；
所述触控电路通过所述开关连接于所述电子发光元件的负极与所述直流低压信号之间的某一连接处，用于根据判定所述基准像素电路是否驱动所述电子发光元件发光来对应选择所述开关的开闭状态，确定工作或不工作。
其中，所述基准像素电路驱动所述电子发光元件发光，则所述开关为断开状态，使得所述触控电路因未接收到所述直流低压信号而无法工作；或
所述基准像素电路截止所述电子发光元件发光，则所述开关为闭合状态，使得所述触控电路可接收到所述直流低压信号而工作，感应触发动作并输出触控信号。
其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
所述耦合电容的另一端接地；
所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
所述运算放大器的另一输入端与内部一工作电压信号相连。
其中，所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
所述存储电路的另一端与所述直流高压信号相连。
其中，所述电子发光元件为有机发光二极管。
相应的，本发明实施例还提供了一种像素电路的驱动方法，其中，其在包括基准像素电路、触控电路以及开关的像素电路中实现；所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连；所述触控电路通过所述开关连接于所述电子发光元件的负极与所述直流低压信号之间的某一连接处；
所述方法包括以下步骤：
确定所述基准像素电路对所述电子发光元件的当前工作状态；所述基准像素电路的当前工作状态为驱动所述电子发光元件发光或截止所述电子发光元件发光；
根据所述基准像素电路的当前工作状态，对应选择所述开关的开闭状态来确定所述触控电路工作或不工作。
其中，所述根据所述基准像素电路的当前工作状态，对应选择所述开关的闭合状态来确定所述触控电路工作或不工作的具体步骤包括：
当所述基准像素电路的当前工作状态为驱动所述电子发光元件发光时，对应选择所述开关处于断开状态，确定所述触控电路不工作。
其中，所述根据所述基准像素电路的当前工作状态，对应选择所述开关的闭合状态来确定所述触控电路工作或不工作的具体步骤还进一步包括：
当所述基准像素电路的当前工作状态为截止所述电子发光元件发光时，对应选择所述开关处于闭合状态，确定所述触控电路工作。
其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
所述耦合电容的另一端接地；
所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
所述运算放大器的另一输入端与内部一工作电压信号相连。
所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
所述存储电路的另一端与所述直流高压信号相连。
其中，所述电子发光元件为有机发光二极管。
相应的，本发明实施例又提供了一种显示面板，其中，包括像素电路；所述像素电路包括基准像素电路、触控电路以及开关；其中，
所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连，用于驱动或截止所述电子发光元件发光；
所述触控电路通过所述开关连接于所述电子发光元件的负极与所述直 流低压信号之间的某一连接处，用于根据判定所述基准像素电路是否驱动所述电子发光元件发光来对应选择所述开关的开闭状态，确定工作或不工作。
其中，所述基准像素电路驱动所述电子发光元件发光，则所述开关为断开状态，使得所述触控电路因未接收到所述直流低压信号而无法工作；或
所述基准像素电路截止所述电子发光元件发光，则所述开关为闭合状态，使得所述触控电路可接收到所述直流低压信号而工作，感应触发动作并输出触控信号。
其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
所述耦合电容的另一端接地；
所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
所述运算放大器的另一输入端与内部一工作电压信号相连。
其中，所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
所述存储电路的另一端与所述直流高压信号相连。
其中，所述电子发光元件为有机发光二极管。
本发明实施例具有如下有益效果：与传统的像素电路相对比，本发明中的像素电路集成有用于驱动截止电子发光元件发光的基准像素电路以及根据判定基准像素电路是否驱动电子发光元件发光来对应选择开关的开闭状态确定工作或不工作的触控电路，从而在传统的像素电路基础上完美的集成了具有触控功能的触控电路，即解决了现有显示面板厚度及弯折的需求，降低了工艺制作难度，还可省去外购触控面板的需求。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中像素电路的物理电路连接示意图；
图2为本发明实施例一提供的像素电路的系统结构示意图；
图3为本发明实施例一提供的像素电路的物理连接示意图；
图4为图3的一工作原理图；
图5为图3的另一工作原理图；
图6为本发明实施例二提供的像素电路的驱动方法的流程图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述。
如图2所示，为本发明实施例一中，提供的一种像素电路，包括基准像素电路1、触控电路2以及开关K；其中，
基准像素电路1的一端连接直流高压信号VDD，另一端连接一电子发光元件L的正极(+)后并经电子发光元件L的负极(-)与直流低压信号VSS相连，用于驱动或截止电子发光元件L发光；
触控电路2通过开关K连接于电子发光元件L的负极(-)与直流低压信号VSS之间的某一连接处O，用于根据判定基准像素电路1是否驱动电子发光元件L发光来对应选择开关K的开闭状态，确定工作或不工作。
应当说明的是，通过开关K的开闭状态，可以避免基准像素电路1对触控电路2的干扰(包括电流、信号等干扰)，因此在基准像素电路1驱动电子发光元件L发光时，通过将开关K设置为断开状态，使得触控电路2因未接收到直流低压信号VSS而无法工作；而在基准像素电路1截止电子发光元件L发光时，将开关K设置为闭合状态，使得触控电路2可接收到直流低压信号VSS而工作，感应触发动作并输出触控信号。
可以理解的是，电子发光元件L为有机发光二极管或其它发光元器件。
如图3所示，触控电路2包括感应电容Cf、耦合电容Cg、运算电容Cb和运算放大器OP；其中，
感应电容Cf的一端设有触控感应线，另一端与开关K、耦合电容Cg的一端、运算电容Cb的一端以及运算放大器OP的一输入端均相连；耦合电容Cg的另一端接地；
运算电容Cb的另一端与所述运算放大器OP的输出端相连，并与所述运算放大器OP形成负反馈放大电路；
运算放大器OP的另一输入端与内部一工作电压信号SWS相连。
基准像素电路1包括开关晶体管T1、驱动晶体管T2、控制晶体管T3和存储电容Cs；其中，
开关晶体管T1的栅极与一扫描信号scan相连，漏极与一数据信号data相连，源极分别与电容Cs的一端以及所述驱动晶体管T2的栅极相连；
驱动晶体管T2的漏极与直流高压信号VDD相连，源极与控制晶体管T3的漏极相连；
控制晶体管T3的栅极与一控制信号EM相连，源极与电子发光元件L的正极(+)相连；
存储电路Cs的另一端与直流高压信号VDD相连。
通过图4和图5，对本发明实施例一中的像素电路的工作原理进行说明：高电平的数据信号data通过开关晶体管T1进入驱动晶体管T2栅极，打开 驱动晶体管T2使得直流高压信号VDD流入控制晶体管T3并导通，使得电子发光元件L发光，此时断开开关K，触控电路2中的运算放大器OP因无法获得直流低压信号VSS而无法工作(如图4所示)；低电平的数据信号data因被开关晶体管T1截止而无法使得驱动晶体管T2栅极获得足够的开启电压，从而使得控制晶体管T3被截止，导致电子发光元件L无法获取电流而发光，此时导通开关K，触控电路2中的运算放大器OP能够获得直流低压信号VSS开始启动工作，感应触发动作并输出触控信号(如图5所示)。
如图6所示，相应于本发明实施例一中的像素电路，本发明实施例二还提供了一种像素电路的驱动方法，其在本发明实施例一中的像素电路上实现，包括以下步骤：
步骤S1、确定基准像素电路对电子发光元件的当前工作状态；所述基准像素电路的当前工作状态为驱动所述电子发光元件发光或截止所述电子发光元件发光；
具体过程为，通过判定基准像素电路是否驱动电子发光元件发光来确定基准像素电路的当前工作状态，发光则说明提供驱动电流，不发光则说明截止驱动电流。
步骤S2、根据所述基准像素电路的当前工作状态，对应选择开关的开闭状态来确定触控电路工作或不工作。
具体过程为，当基准像素电路的当前工作状态为驱动电子发光元件发光 时，对应选择开关处于断开状态，确定触控电路不工作；或当基准像素电路的当前工作状态为截止电子发光元件发光时，对应选择开关处于闭合状态，确定触控电路工作。
相应于本发明实施例一中的像素电路，本发明实施例三又提供了一种显示面板，包括本发明实施例一中的像素电路，并具有与本发明实施例一中的像素电路相同的结构和连接关系，因此具体请参见本发明实施例一中的相关内容，在此不再一一赘述。
综上所述，实施本发明实施例，具有如下有益效果：与传统的像素电路相对比，本发明中的像素电路集成有用于驱动截止电子发光元件发光的基准像素电路以及根据判定基准像素电路是否驱动电子发光元件发光来对应选择开关的开闭状态确定工作或不工作的触控电路，从而在传统的像素电路基础上完美的集成了具有触控功能的触控电路，即解决了现有显示面板厚度及弯折的需求，降低了工艺制作难度，还可省去外购触控面板的需求。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (16)

  1. 一种像素电路，其中，包括基准像素电路、触控电路以及开关；其中，
    所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连，用于驱动或截止所述电子发光元件发光；
    所述触控电路通过所述开关连接于所述电子发光元件的负极与所述直流低压信号之间的某一连接处，用于根据判定所述基准像素电路是否驱动所述电子发光元件发光来对应选择所述开关的开闭状态，确定工作或不工作。
  2. 如权利要求1所述的像素电路，其中，所述基准像素电路驱动所述电子发光元件发光，则所述开关为断开状态，使得所述触控电路因未接收到所述直流低压信号而无法工作；或
    所述基准像素电路截止所述电子发光元件发光，则所述开关为闭合状态，使得所述触控电路可接收到所述直流低压信号而工作，感应触发动作并输出触控信号。
  3. 如权利要求2所述的像素电路，其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
    所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
    所述耦合电容的另一端接地；
    所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
    所述运算放大器的另一输入端与内部一工作电压信号相连。
  4. 如权利要求3所述的像素电路，其中，所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
    所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
    所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
    所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
    所述存储电路的另一端与所述直流高压信号相连。
  5. 如权利要求4所述的像素电路，其中，所述电子发光元件为有机发光二极管。
  6. 一种像素电路的驱动方法，其中，其在包括基准像素电路、触控电路以及开关的像素电路中实现；所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连；所述触控电路通过所述开关连接于所述电子发光元件的负 极与所述直流低压信号之间的某一连接处；
    所述方法包括以下步骤：
    确定所述基准像素电路对所述电子发光元件的当前工作状态；所述基准像素电路的当前工作状态为驱动所述电子发光元件发光或截止所述电子发光元件发光；
    根据所述基准像素电路的当前工作状态，对应选择所述开关的开闭状态来确定所述触控电路工作或不工作。
  7. 如权利要求6中所述的像素电路的驱动方法，其中，所述根据所述基准像素电路的当前工作状态，对应选择所述开关的闭合状态来确定所述触控电路工作或不工作的具体步骤包括：
    当所述基准像素电路的当前工作状态为驱动所述电子发光元件发光时，对应选择所述开关处于断开状态，确定所述触控电路不工作。
  8. 如权利要求6所述的像素电路的驱动方法，其中，所述根据所述基准像素电路的当前工作状态，对应选择所述开关的闭合状态来确定所述触控电路工作或不工作的具体步骤还进一步包括：
    当所述基准像素电路的当前工作状态为截止所述电子发光元件发光时，对应选择所述开关处于闭合状态，确定所述触控电路工作。
  9. 如权利要求6所述的像素电路的驱动方法，其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
    所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
    所述耦合电容的另一端接地；
    所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
    所述运算放大器的另一输入端与内部一工作电压信号相连。
  10. 如权利要求6所述的像素电路的驱动方法，其中，所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
    所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
    所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
    所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
    所述存储电路的另一端与所述直流高压信号相连。
  11. 如权利要求6所述的像素电路的驱动方法，其中，所述电子发光元件为有机发光二极管。
  12. 一种显示面板，其中，包括像素电路；所述像素电路包括基准像素电路、触控电路以及开关；其中，
    所述基准像素电路的一端连接直流高压信号，另一端连接一电子发光元件的正极后并经所述电子发光元件的负极与直流低压信号相连，用于驱动或截止所述电子发光元件发光；
    所述触控电路通过所述开关连接于所述电子发光元件的负极与所述直流低压信号之间的某一连接处，用于根据判定所述基准像素电路是否驱动所述电子发光元件发光来对应选择所述开关的开闭状态，确定工作或不工作。
  13. 如权利要求12所述的显示面板，其中，所述基准像素电路驱动所述电子发光元件发光，则所述开关为断开状态，使得所述触控电路因未接收到所述直流低压信号而无法工作；或
    所述基准像素电路截止所述电子发光元件发光，则所述开关为闭合状态，使得所述触控电路可接收到所述直流低压信号而工作，感应触发动作并输出触控信号。
  14. 如权利要求13所述的显示面板，其中，所述触控电路包括感应电容、耦合电容、运算电容和运算放大器；其中，
    所述感应电容的一端设有触控感应线，另一端与所述开关、所述耦合电容的一端、所述运算电容的一端以及所述运算放大器的一输入端均相连；
    所述耦合电容的另一端接地；
    所述运算电容的另一端与所述运算放大器的输出端相连，并与所述运算放大器形成负反馈放大电路；
    所述运算放大器的另一输入端与内部一工作电压信号相连。
  15. 如权利要求14所述的显示面板，其中，所述基准像素电路包括开关晶体管、驱动晶体管、控制晶体管和存储电容；其中，
    所述开关晶体管的栅极与一扫描信号相连，漏极与一数据信号相连，源极分别与所述电容的一端以及所述驱动晶体管的栅极相连；
    所述驱动晶体管的漏极与所述直流高压信号相连，源极与所述控制晶体管的漏极相连；
    所述控制晶体管的栅极与一控制信号相连，源极与所述电子发光元件的正极相连；
    所述存储电路的另一端与所述直流高压信号相连。
  16. 如权利要求15所述的显示面板，其中，所述电子发光元件为有机发光二极管。
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