WO2015018141A1 - 移位寄存器单元及其驱动方法、移位寄存器与显示装置 - Google Patents
移位寄存器单元及其驱动方法、移位寄存器与显示装置 Download PDFInfo
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- WO2015018141A1 WO2015018141A1 PCT/CN2013/087574 CN2013087574W WO2015018141A1 WO 2015018141 A1 WO2015018141 A1 WO 2015018141A1 CN 2013087574 W CN2013087574 W CN 2013087574W WO 2015018141 A1 WO2015018141 A1 WO 2015018141A1
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- thin film
- film transistor
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- module
- input terminal
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
-
- 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]
- G09G3/3266—Details of drivers for scan electrodes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/18—Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages
- G11C19/182—Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages in combination with semiconductor elements, e.g. bipolar transistors, diodes
- G11C19/184—Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages in combination with semiconductor elements, e.g. bipolar transistors, diodes with field-effect transistors, e.g. MOS-FET
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
Definitions
- the present invention relates to the field of display, and in particular, to a shift register unit and a driving method thereof, a shift register and a display device. Background technique
- Oxide thin film transistors are the development direction of large-size active matrix organic light-emitting diode (AMOLED) displays/liquid crystal displays (LCDs), so gates are fabricated on existing GOA (Gate On Array) Medium is widely used.
- AMOLED active matrix organic light-emitting diode
- LCDs liquid crystal displays
- the oxide TFT has a depletion type, that is, the threshold voltage of the oxide TFT is negative, which causes a problem of leakage current always existing in the implementation of the GOA.
- the invention provides a shift register unit and a driving method thereof, a shift register and a display device, thereby solving the problem of excessive leakage of the GOA circuit, and effectively solving the reliability and power consumption problem of the GOA circuit using the oxide thin film transistor. .
- the invention provides the following solutions:
- the embodiment of the present invention provides a shift register unit, including a first capacitor, a pull-up module, a pre-charging module, and a pull-down module, where the first end of the first capacitor and the pull-up module are connected to the pull-up node, Also includes: a shutdown module, connected to the pull-up node, and connected to a first node between the pre-charging module and the pull-down module, configured to disconnect the pull-up node from the pre-charging module and pull-down during a pull-up phase The electrical connection of the module.
- the shutdown module comprises:
- a source of the first thin film transistor is connected to the first node, a gate of the first thin film transistor is connected to a second clock signal input end, and a drain of the first thin film transistor is connected to the pull-up node ;
- a shutdown control unit configured to: in a pull-up phase, the first thin film transistor is in a completely off state by controlling a source voltage of the first thin film transistor to disconnect the pull-up node from the pre-charge module Electrical connection to the pull-down module.
- the shutdown control unit comprises:
- a feedback capacitor a first end of the feedback capacitor is coupled to a source of the first thin film transistor, and a second end of the feedback capacitor is coupled to the pull-up module and the pull-down module.
- the shutdown control unit further includes:
- a source of the second thin film transistor is connected to the pull-up module and the pull-down module, a gate of the second thin film transistor is connected to a first clock signal input end, and a drain of the second thin film transistor is The source connection of the first thin film transistor is described.
- the shutdown control unit further includes:
- a source of the second thin film transistor is connected to the pull-up module and the pull-down module, a gate of the second thin film transistor is connected to a source of the second thin film transistor, and a drain of the second thin film transistor is The source of the first thin film transistor is connected.
- the shutdown module comprises:
- a source of the first thin film transistor is connected to a drain of the second thin film transistor and a drain of the third thin film transistor, and a gate of the first thin film transistor is connected to a second clock signal input end, and a drain of the first thin film transistor is Said pull up node connection;
- a source of the second thin film transistor is connected to the pull-up module and the pull-down module, and a gate of the second thin film transistor is connected to the first clock signal input end;
- a source of the third thin film transistor is connected to the first node, and a gate of the third thin film transistor is The second clock signal input terminal is connected.
- the pull-up module comprises:
- a source of the fourth thin film transistor is connected to the first clock signal input end, a gate of the fourth thin film transistor is connected to the pull-up node, a drain of the fourth thin film transistor and a second of the first capacitor
- the terminal, the pull-down module, and the signal output are connected.
- the pull-up module comprises:
- a source of the fourth thin film transistor and a source of the fifth thin film transistor are connected to the first clock signal input end;
- a gate of the fourth thin film transistor and a gate of the fifth thin film transistor are connected to the pull-up node; a drain of the fourth thin film transistor is connected to the gate signal output end, the second end of the first capacitor, and the pull-down module;
- the drain of the fifth thin film transistor is connected to the turn-off module, the pull-down module, and the start signal output.
- the pre-charging module includes:
- the source and the gate of the sixth thin film transistor are connected to the start signal input terminal, and the drain of the sixth thin film transistor is connected to the turn-off module and the pull-down module.
- the pull-down module includes:
- a source of the seventh thin film transistor is connected to the pre-charging module and the shutdown module, and a gate of the seventh thin film transistor is connected to the control unit, a gate of the eighth thin film transistor, and a gate of the ninth thin film transistor.
- a node, a drain of the seventh thin film transistor is connected to the first level signal input end;
- a source of the eighth thin film transistor is connected to the pull-up module, the turn-off module, the start signal output end, and the drain of the eighth thin film transistor The first level signal input terminal is connected;
- the source of the ninth thin film transistor is connected to the pull-up module, the second end of the first capacitor, and the gate signal output end, and the drain of the ninth thin film transistor is connected to the second level signal input end.
- the potential of the input signal of the second level signal input terminal is less than zero and higher than the potential of the input signal of the first level signal input terminal.
- the embodiment of the invention further provides a method for driving a shift register unit, comprising:
- the potential of the pull-up node and the first node is pulled up to the first potential, and the turn-off module is in an on state;
- the shutdown module In the pull-up phase, the potential of the pull-up node and the first node is pulled up to a second potential higher than the first potential, the shutdown module is in a completely off state, and between the pull-up node and the pre-charge module and the pull-down module The electrical connection is broken;
- the shutdown module In the reset phase, the shutdown module is in an on state, and the potential of the pull-up node and the first node is pulled down to a third potential lower than the first potential;
- the shutdown module In the reset sustain phase, the shutdown module is in an off state, and the potential of the pull-up node and the first node is maintained at the third potential.
- the first clock signal input terminal inputs a low-level signal
- the second clock signal input terminal inputs a high-level signal
- the start signal input terminal inputs a high-level signal
- the first clock signal input terminal inputs a high level signal
- the second clock signal input terminal inputs a low level signal
- the start signal input terminal inputs a low level signal
- the first clock signal input terminal inputs a low level signal
- the second clock signal input terminal inputs a high level signal
- the start signal input terminal inputs a low level signal
- the first clock signal input terminal inputs a high level signal
- the second clock signal input terminal inputs a low level signal
- the start signal input terminal inputs a low level signal.
- the embodiment of the present invention further provides a shift register, which specifically includes a plurality of stages of the shift register unit according to the embodiment of the present invention.
- the embodiment of the present invention further provides a display device, and the display device may specifically include the shift register provided by the embodiment of the present invention.
- the shift register unit and the driving method thereof, the shift register and the display device provided by the present invention are configured to disconnect the pull-up node PU and the pre-charge in a pull-up phase.
- the shutdown module of the electrical connection between the module and the pull-down module can solve the problem of excessive leakage of the GOA circuit, and effectively solve the reliability and power consumption problem of the GOA circuit using the oxide thin film transistor.
- 1 is a schematic structural diagram of a conventional shift register unit
- FIG. 2 is a schematic structural diagram 1 of a shift register unit according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram 2 of a shift register unit according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram 3 of a shift register unit according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of signal timings applicable to a shift register according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram 4 of a shift register unit according to an embodiment of the present invention
- FIG. 7 is a schematic structural diagram 5 of a shift register unit according to an embodiment of the present disclosure.
- FIG. 8 is a schematic structural diagram 6 of a shift register unit according to an embodiment of the present invention.
- FIG. 9 is a schematic structural diagram 7 of a shift register unit according to an embodiment of the present disclosure.
- FIG. 10 is a schematic structural diagram 8 of a shift register unit according to an embodiment of the present invention.
- FIG. 11 is a schematic structural diagram 9 of a shift register unit according to an embodiment of the present disclosure.
- FIG. 12 is a schematic structural diagram 10 of a shift register unit according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram 11 of a shift register unit according to an embodiment of the present invention.
- FIG. 14 is a schematic structural diagram 1 of a pull-down control unit according to an embodiment of the present invention.
- FIG. 15 is a schematic structural diagram 2 of a pull-down control unit according to an embodiment of the present disclosure.
- 16 is a schematic structural diagram 3 of a pull-down control unit according to an embodiment of the present invention.
- FIG. 17 is a schematic flowchart of a method for driving a shift register unit according to an embodiment of the present invention
- FIG. 18 is a schematic structural diagram of a shift register unit according to an embodiment of the present invention
- FIG. 19 is a comparison diagram of simulation results of an output waveform of a GOA circuit and an existing GOA circuit according to an embodiment of the present invention. Concrete implementation
- the embodiment of the present invention provides a shift register unit, as shown in FIG. 2, which may specifically include a first capacitor C1, a pull-up module 1, a pre-charging module 2, and a pull-down module 3, and a first end of the first capacitor C1. Connected to the pull-up node PU with the pull-up module 1;
- the shift register unit may further include:
- the shutdown module 4 is connected to the pull-up node PU and connected to the first node LK between the pre-charging module 2 and the pull-down module 3 for disconnecting the pull-up node PU and the pre-charging module 2 during the pull-up phase. Pull down the electrical connection of module 3.
- the shift register unit provided by the embodiment of the invention can completely disconnect the electrical connection between the pull-up node PU and the pre-charging module 2 and the pull-down module 3 in the pull-up phase, thereby solving the problem of excessive leakage of the GOA circuit and effectively solving the problem. Reliability and power consumption of GOA circuits using oxide thin film transistors (TFTs).
- TFTs oxide thin film transistors
- a broken line between the shutdown module 4 and the second end of the first capacitor C1 is used to indicate that in different embodiments, the shutdown module 4 is electrically connected or non-existent with the second end of the first capacitor C1. The relationship of electrical connections.
- the shutdown module 4 may specifically include: a first thin film transistor T1, that is, a turn-off transistor, and a source of the first thin film transistor T1 is connected to the first node LK, a gate of the thin film transistor T1 is connected to the second clock signal input terminal CLKB, and a drain of the first thin film transistor T1 is connected to the pull-up node PU;
- control unit 41 in the pull-up phase, by controlling the source voltage of the first thin film transistor T1 such that the first thin film transistor T1 is in a completely off state to disconnect the pull-up node PU and the pre- The electrical connection of the charging module 2 and the pull-down module 3.
- the shutdown control unit 41 may specifically include: The feedback capacitor C2 has a first end connected to the source of the first thin film transistor T1 and a second end of the feedback capacitor C2 connected to the pull-up module 1 and the pull-down module 3.
- the second end of the feedback capacitor C2 may also be connected to the second end of the first capacitor C1 and the gate signal output terminal OUTPUT_gate (specifically, as shown in FIG. 4, the gate The pole signal output terminal OUTPUT_ Gate is the OUTPUT shown in FIG. 4, or the second terminal of the feedback capacitor C2 can also be connected to the start signal output terminal OUTPUT_STV (specifically, as shown in FIG. 9).
- the second clock signal input terminal CLKB inputs a high-level signal
- the first thin film transistor T1 is turned on, that is, the pull-up node PU and the first node LK are pulled up to a high level potential.
- the first clock signal input terminal CLK inputs a low level signal
- the signal output terminal OUTPUT outputs a low level signal.
- the first end of the feedback capacitor C2, that is, the voltage at the first node LK is
- phase B (which may also be referred to as an output phase)
- the second clock signal input terminal CLKB inputs a low-level signal
- the first thin film transistor T1 is in an off state
- the first clock signal input terminal CLK is input at a high level.
- the first thin film transistor T1 is completely turned off, the first thin film transistor T1 is in a completely off state, and the electrical connection between the pull-up node PU and the first node LK is completely cut off, that is, the pull-up node PU point and the pre-charge module 2 and the electrical connection between the pull-down module 3 is completely cut off, solved due to TFT
- the pre-charging module 2 and the pull-down module 3 caused by the depletion type are not tightly closed and the leakage current is too large, and the output waveform of the pull-up node PU and the signal output terminal OUTPUT is distorted, eventually causing the problem of G0A failure.
- the shutdown control unit 41 may further include: a second thin film transistor T2, a source of the second thin film transistor T2, and a pull-up module 1 and a pull-down The module 3 is connected, the gate of the second thin film transistor T2 is connected to the first clock signal input terminal CLK, and the drain of the second thin film transistor T2 is connected to the source of the first thin film transistor T1.
- the source of the second thin film transistor T2 may also be connected to the second end of the first capacitor C1 and the gate signal output terminal OUTPUT_ Gate (specifically, as shown in FIG.
- the gate signal output terminal OUTPUT_ Gate is the OUTPUT terminal shown in FIG. 6, or the source of the second thin film transistor T2 can also be connected to the start signal output terminal OUTPUT_STV (specifically, as shown in FIG. 10 »).
- the second clock signal input terminal CLKB inputs a high-level signal
- the first thin film transistor T1 is in an on state
- the pull-up node PU and the first node LK are pulled up to a high-level potential
- first The clock signal input terminal CLK inputs a low level signal
- the second thin film transistor T2 is in an off state
- the signal output terminal OUTPUT outputs a low level signal
- the voltage at the first node LK is V eH ;
- the second clock signal input terminal CLKB inputs a low-level signal
- the first thin film transistor T1 is in an off state
- the first clock signal input terminal CLK inputs a high level signal
- the second thin film transistor T2 is in a conducting state.
- the signal output terminal OUTPUT outputs a high level signal.
- the signal output terminal OUTPUT outputs a high level signal which is fed back to the first node LK, and the voltage at the first node LK About VGH, the gate-source voltage Ve ⁇ VeL -VeH of the first thin film transistor T1, due to V (jL takes about -8V, V GH takes about 5V, and the threshold voltage V TH of the first thin film transistor T1 The value is about -IV, then the gate-source voltage V QS of the first thin film transistor T1 is approximately equal to -13V ⁇ V TH ⁇ 0, which is a deep negative voltage. Therefore, the first thin film transistor T1 is completely turned off, the first film.
- the transistor T1 is in a completely off state, and the electrical connection between the pull-up node PU and the first node LK is completely cut off, that is, the electrical connection between the PU node of the pull-up node and the pre-charging module 2 and the pull-down module 3 is completely cut off, Depleted due to TFT Cause of precharge pull-down module 2 and module 3 is turned off and the drain current is too large loose, the pull-up node PU and the signal output terminal OUTPUT output waveform distortion, resulting in problems GOA failure.
- the gate of the second thin film transistor T2 is connected to the first clock signal input terminal CLK, and the source of the second thin film transistor T2 is substantially the first time.
- the clock signal input terminals CLK There is also an electrical connection between the clock signal input terminals CLK, and therefore, there may be another alternative form of the shutdown control unit 41 as shown in FIG.
- the source of the second thin film transistor T2 is connected to the pull-up module 1 and the pull-down module 3, the gate of the second thin film transistor T2 is connected to the source of the second thin film transistor T2, and the drain of the second thin film transistor T2 The source of the first thin film transistor T1 is connected.
- the source of the second thin film transistor T2 may also be connected to the second end of the first capacitor C1 and the gate signal output terminal OUTPUT_ Gate (specifically, as shown in FIG. 7
- the gate signal output terminal OUTPUT_ Gate is the OUTPUT terminal shown in FIG. 7, or the source of the second thin film transistor T2 can also be connected to the start signal output terminal OUTPUT_STV (specifically, as shown in FIG. 11).
- the gate-source voltage VGS of the first thin film transistor T1 is approximately equal to -13V ⁇ V TH ⁇ 0, is a deep negative voltage, therefore, in this embodiment, the first thin film transistor T1 can also be completely turned off, the first thin film transistor T1 is in a completely off state, and the electrical connection between the pull-up node PU and the first node LK It can also be completely cut off, that is, the electrical connection between the PU point of the pull-up node and the pre-charging module 2 and the pull-down module 3 can also be completely cut off, and the pre-charging module 2 and the pull-down due to the depletion characteristics of the TFT are also solved. Module 3 is not tightly closed and the leakage current is too large. The output waveform of the pull-up node PU and the signal output terminal OUTPUT is distorted, which eventually leads to the problem of GOA failure.
- the shutdown module 4 can also be presented in the circuit configuration shown in FIG.
- the shutdown module 4 may specifically include:
- the gate of the transistor T1 is connected to the second clock signal input terminal CLKB, and the drain of the first thin film transistor T1 is connected to the pull-up node PU;
- the source of the second thin film transistor T2 is connected to the pull-up module 1 and the pull-down module 3, and the gate of the second thin film transistor T2 is connected to the first clock signal input terminal CLK, and in different embodiments, the second thin film transistor
- the source of ⁇ 2 may also be connected to the second end of the first capacitor C1, the gate signal output terminal OUTPUT Gate (specifically, the OUTPUT terminal as shown in FIG. 8), or the second thin film crystal
- the source of the body tube T2 can also be connected to the start signal output terminal OUTPUT_STV (specifically, as shown in FIG.
- the source of the third thin film transistor T3 is connected to the first node LK, and the gate of the third thin film transistor T3 is connected to the second clock signal input terminal CLKB.
- the gate-source voltage V QS of the first thin film transistor T1 is approximately equal to -13V ⁇ V TH . ⁇ 0, for the deep negative voltage, the first thin film transistor T1 can also be completely turned off, and, since the third thin film transistor T3 is also in the off state in the pull-up phase, thereby causing the pull-up node PU and the first node LK
- the connection link there are two transistors in an off state (where the first thin film transistor T1 is in a completely off state), thereby forming a double fuse of shutdown, and therefore, the power between the pull-up node PU and the first node LK
- the connection can also be completely cut off, that is, the electrical connection between the PU point of the pull-up node and the pre-charging module 2 and the pull-down module 3 can also be completely cut off, and the pre-charging module 2 due to the depletion characteristics
- circuit structure of the shift register unit provided by the embodiment of the present invention may also be as shown in FIGS. 9, 10, 11, and 12.
- the pull-up module 1 may specifically include:
- the fourth thin film transistor T4 has a source connected to the first clock signal input terminal CLK, a gate connected to the pull-up node PU, and a drain specifically connected to the second end of the first capacitor C1, the pull-down module 3, and the signal output. End OUTPUT connection.
- the pull-up module 1 may specifically include a fourth thin film transistor T4, a fifth thin film transistor ⁇ 5;
- a source of the fourth thin film transistor ⁇ 4 and a source of the fifth thin film transistor ⁇ 5 are connected to the first clock signal input terminal CLK;
- a gate of the fourth thin film transistor ⁇ 4 and a gate of the fifth thin film transistor ⁇ 5 are connected to the pull-up node PU;
- a drain of the fourth thin film transistor T4 is connected to the gate signal output terminal OUTPUT_ Gate, the second end of the first capacitor C1, and the pull-down module 3;
- the drain of the fifth thin film transistor T5 is connected to the turn-off module 4, the pull-down module 3, and the start signal output terminal OUTPUT_STV.
- the pre-charging module 2 may specifically include: a sixth thin film transistor T6;
- the source and the gate of the sixth thin film transistor T6 are connected to the start signal input terminal STV, and the drain and turn-off module 4 of the sixth thin film transistor T6 and the pull-down module 3 are connected to the first node LK.
- the pull-down module 3 may specifically include: a seventh thin film transistor T7, an eighth thin film transistor ⁇ 8, a ninth thin film transistor ⁇ 9, and a seventh thin film transistor ⁇ 7. a pull-down control unit 31 that turns on or off the eighth thin film transistor ⁇ 8 and the ninth thin film transistor ⁇ 9;
- the source of the seventh thin film transistor T7 is connected to the first level signal input terminal VGL1, the gate of the seventh thin film transistor T7, and the control unit 31, the gate of the eighth thin film transistor T8, and the gate of the ninth thin film transistor T9.
- the drain of the seventh thin film transistor T7 is connected to the pre-charging module 2, the shutdown module 4, that is, connected to the first node LK;
- the source of the eighth thin film transistor T8 is connected to the first level signal input terminal VGL1, and the drain of the eighth thin film transistor T8 is connected to the pull-up module 1, the shutdown module 4, and the start signal output terminal OUTPUT_STV;
- the source of the ninth thin film transistor T9 is connected to the second level signal input terminal VGL2, the drain of the ninth thin film transistor T9, and the pull-up module 1, the second end of the first capacitor C1, and the gate signal output terminal OUTPUT. Gate connection.
- the potential of the input signal of the second level signal input terminal VGL2 may be less than zero and higher than the potential of the input signal of the first level signal input terminal VGL1.
- the pull-down control unit 31 of the embodiment of the present invention may specifically include:
- the source and the gate of the tenth thin film transistor T10 are connected to the second clock signal input terminal CLKB, and the drain of the tenth thin film transistor T10 is connected to the pull-down node PD;
- the drain of the eleventh thin film transistor T11 is connected to the pull-down node PD, and the eleventh thin film transistor
- the gate of Ti l is connected to the start signal input terminal STV, and the source of the eleventh thin film transistor Til is connected to the first level signal input terminal VGL1.
- the pull-down control unit 31 of the embodiment of the present invention may specifically include:
- the first end of the third capacitor C3 is connected to the second clock signal input terminal CLKB, and the second end of the third capacitor C3 is connected to the pull-down node PD;
- the drain of the tenth thin film transistor T10 is connected to the pull-down node PD, the gate of the tenth thin film transistor T10 is connected to the start signal input terminal STV, and the source of the tenth thin film transistor T10 is connected to the first level signal input terminal VGL.
- the pull-down control unit 31 of the embodiment of the present invention may specifically include:
- a tenth thin film transistor T10 an eleventh thin film transistor T11, a twelfth thin film transistor ⁇ 12, a thirteenth thin film transistor T13;
- the source and the gate of the tenth thin film transistor T10 are connected to the second clock signal input terminal CLKB, the drain of the tenth thin film transistor T10, and the gate of the eleventh thin film transistor T11 and the drain of the twelfth thin film transistor T12. Pole connection
- the source of the eleventh thin film transistor T11 is connected to the second clock signal input terminal CLKB, and the drain of the eleventh thin film transistor T11 is connected to the pull-down node PD;
- the gate of the twelfth thin film transistor T12 is connected to the start signal input terminal STV and the thirteenth thin film transistor T13, the source of the twelfth thin film transistor T12, and the first level signal input terminal VGL, The source of the thirteen thin film transistor T13 is connected;
- the drain of the thirteenth thin film transistor T13 is connected to the pull-down node PD.
- the thin film transistor according to the embodiment of the present invention may be an N-type thin film transistor.
- the embodiment of the present invention further provides a method for driving a shift register unit. As shown in FIG. 17, the method may specifically include:
- Step 171 in the pre-charging phase, the potentials of the pull-up node PU and the first node LK are pulled up to the first potential, and the turn-off module 4 is in an on state;
- Step 172 in the pull-up phase, the potential of the pull-up node PU and the first node LK is pulled up to high
- the shutdown module 4 is in a completely off state, and the electrical connection between the pull-up node PU and the pre-charging module 2 and the pull-down module 3 is disconnected;
- Step 173 in the reset phase, the shutdown module 4 is in an on state, and the potentials of the pull-up node PU and the first node LK are pulled down to a third potential lower than the first potential;
- Step 174 in the reset maintenance phase, the shutdown module 4 is in an off state, and the potentials of the pull-up node PU and the first node LK are maintained at the third potential.
- the following is a shift register unit as shown in FIG. 18, taking a signal timing diagram as shown in FIG. 5 as an example, and a specific implementation process of the shift register driving method provided by the embodiment of the present invention is described in detail.
- the process specific can include:
- the first clock signal input terminal CLK inputs a low level signal such as V GL
- the second clock signal inputs the input terminal CLKB to input a high level signal such as V QH
- the start signal input terminal STV input is high.
- the flat signal is, for example, VeH; at this time, T1 and T6-T11 are all in the on state, ⁇ 4 and ⁇ 5 are in the off state, and the gate signal output terminal OUTPUT_ Gate outputs the low level signal V input from the second level signal input terminal VGL2.
- the start signal output terminal OUTPUT_STV outputs the low level signal V QU input from the first level signal input terminal VGL1, and the potentials of the first node LK and the pull-up node PU are pulled up to the high level potential
- the voltage of the first node LK may specifically be V GH -V GL1
- the potential of the pull-down node PD is equal to the low level signal V QU input by the first level signal input terminal VGL1.
- the first clock signal input terminal CLK inputs a high level signal such as V QH
- the second clock signal input terminal CLKB inputs a low level signal such as V Q L
- the start signal input terminal STV input is low.
- T1 is completely turned off, T1 is in a completely off state.
- the electrical connection between the pull-up node PU and the first node LK is completely cut off, that is, pull-up
- the electrical connection between the node PU point and the pre-charging module 2 and the pull-down module 3 is completely cut off, so that the pull-up node PU does not leak due to the unsatisfactory turn-off of T6 and T7. If the flow is too large, the pull-up node PU loses the pull-up effect, which causes the waveform of the output signal of the signal output to be malformed, and the output is abnormal.
- the pull-down node PD that is, the gate voltage of T9 is V QU
- the source of T9 is connected to the second level signal input terminal, that is, the T9 source voltage is V Q L 2 , due to the second level signal input.
- the potential of the VGL2 input signal V Q L 2 may be less than zero and higher than the potential of the input signal V QU of the first level signal input terminal VGL1. Therefore, the gate-source voltage of T9 is also a deep negative voltage, that is, T9 is also completely The off-state, so that the gate signal output from the gate signal output terminal OUTPUT- Gate does not have the influence of leakage current, ensuring a stable output of the gate signal.
- phase C In the phase C reset phase.
- the first clock signal input terminal CLK inputs a low level signal
- the second clock signal inputs an input terminal CLKB to input a high level signal
- the start signal input terminal STV inputs a low level signal
- Tl, T7-T10 are at In the on state, T4, T5, T6, Til are in the off state;
- Tl, ⁇ 7 realize the discharge of CI and C2, pull down the pull-up node PU and the first node LK potential to V n T9 and the gate signal output terminal OUTPUT—
- the potential of the Gate output signal is pulled down to ⁇ 2 , and ⁇ 8 pulls down the potential of the output signal of the start signal OUTPUT_STV to V QU .
- phase D the reset phase is reset.
- the first clock signal input terminal CLK inputs a high level signal
- the second clock signal input terminal CLKB inputs a low level signal
- the start signal input terminal STV inputs a low level signal; at this time, Tl, T6-T11 are all cut off.
- the state, ⁇ 4, ⁇ 5 are in the on state; the pull-up node PU and the first node LK are maintained at the low level potential, and the potentials of the gate signal output terminal OUTPUT_gate and the start signal output terminal OUTPUT_STV remain unchanged. .
- the shift register unit driving method provided by the embodiment of the present invention can completely disconnect the electrical connection between the pull-up node PU and the pre-charging module 2 and the pull-down module 3 in the pull-up phase, thereby Solving the problem of excessive leakage of the GOA circuit effectively solves the problem of reliability and power consumption of the GOA circuit using the oxide thin film transistor (TFT).
- TFT oxide thin film transistor
- the comparison between the GOA circuit and the output waveform simulation result of the existing GOA circuit can be seen (where the identifier 1 is a schematic diagram of the output waveform simulation of the GOA circuit provided by the embodiment of the present invention.
- Mark 2 refers to the simulation diagram of the output waveform of the existing GOA circuit.
- the existing general GOA circuit has a large leakage current due to the depletion characteristics of the thin film transistor TFT, and the pull-up node PU and the output waveform occur.
- the GOA provided by the embodiment of the present invention is provided with a shutdown module, so that the electrical connection between the pull-up node PU and the pre-charging module and the pull-down module is completely turned off, effectively Cut off
- the pull-up node PU leaks current, so that the PU and the output waveform are normal from the pull-up node, and the GOA works normally.
- the embodiment of the present invention further provides a shift register, which specifically includes a plurality of stages of the shift register unit provided by the embodiment of the present invention.
- the first stage shift register unit gate signal output end in addition to the first stage, the first stage shift register unit gate signal output end
- OUTPUT The signal output by the Gate is the reset signal of the shift register unit of the previous stage; except for the last stage, the signal output from the first shift register unit start signal output terminal OUTPUT_STV is the shift register unit input of the next stage. The starting signal.
- the embodiment of the invention further provides a display device, which comprises the above-mentioned shift register provided by the embodiment of the invention.
- the display device may specifically be a display device such as a liquid crystal panel, a liquid crystal television, a liquid crystal display, an OLED (Organic Light Emitting Diode) panel, an OLED display, a plasma display, or an electronic paper.
- a display device such as a liquid crystal panel, a liquid crystal television, a liquid crystal display, an OLED (Organic Light Emitting Diode) panel, an OLED display, a plasma display, or an electronic paper.
- the shift register unit, shift register and display device provided by the embodiments of the present invention are particularly suitable for the GOA circuit under the LTPS (Low Temperature Polysilicon Technology) process, and can also be applied to the GOA circuit under the amorphous silicon process.
- LTPS Low Temperature Polysilicon Technology
- CMOS Complementary Metal Oxide Semiconductor
- the present invention provides a shift register unit and a driving method thereof, a shift register and a display device, which are arranged to disconnect the pull-up node PU and the pre-stage during a pull-up phase
- the shutdown module electrically connected between the charging module and the pull-down module can solve the problem of excessive leakage of the GOA circuit, and effectively solves the reliability and power consumption problem of the GOA circuit using the oxide thin film transistor.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Shift Register Type Memory (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/359,856 US9437324B2 (en) | 2013-08-09 | 2013-11-21 | Shift register unit, driving method thereof, shift register and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310347123.8 | 2013-08-09 | ||
| CN201310347123.8A CN103474038B (zh) | 2013-08-09 | 2013-08-09 | 移位寄存器单元及其驱动方法、移位寄存器与显示装置 |
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| WO2015018141A1 true WO2015018141A1 (zh) | 2015-02-12 |
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| PCT/CN2013/087574 Ceased WO2015018141A1 (zh) | 2013-08-09 | 2013-11-21 | 移位寄存器单元及其驱动方法、移位寄存器与显示装置 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12387805B2 (en) | 2019-12-13 | 2025-08-12 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device, display device, and electronic device |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN104392701B (zh) * | 2014-11-07 | 2016-09-14 | 深圳市华星光电技术有限公司 | 用于氧化物半导体薄膜晶体管的扫描驱动电路 |
| CN104537992B (zh) * | 2014-12-30 | 2017-01-18 | 深圳市华星光电技术有限公司 | 用于液晶显示装置的goa电路 |
| US9626928B2 (en) | 2014-12-31 | 2017-04-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display device comprising gate driver on array circuit |
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| TWI559276B (zh) * | 2015-03-18 | 2016-11-21 | 友達光電股份有限公司 | 移位暫存電路 |
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| TWI568184B (zh) * | 2015-12-24 | 2017-01-21 | 友達光電股份有限公司 | 移位暫存電路及其驅動方法 |
| CN105654991B (zh) * | 2016-01-19 | 2019-08-02 | 京东方科技集团股份有限公司 | 移位寄存器及其驱动方法、goa电路以及显示装置 |
| CN105489156B (zh) | 2016-01-29 | 2019-01-25 | 京东方科技集团股份有限公司 | 移位寄存单元及驱动方法、栅极驱动电路和显示装置 |
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| CN106098002B (zh) * | 2016-08-05 | 2018-10-19 | 武汉华星光电技术有限公司 | 扫描驱动电路及具有该电路的平面显示装置 |
| CN106652901B (zh) * | 2016-12-22 | 2019-12-31 | 武汉华星光电技术有限公司 | 驱动电路及使用其的显示装置 |
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| CN106601176A (zh) | 2017-01-16 | 2017-04-26 | 京东方科技集团股份有限公司 | 移位寄存器单元电路、驱动方法、移位寄存器和显示装置 |
| CN106782285B (zh) * | 2017-03-03 | 2020-02-14 | 京东方科技集团股份有限公司 | 移位寄存器单元及其驱动方法、栅极驱动电路及显示装置 |
| CN107068087B (zh) * | 2017-03-31 | 2019-11-26 | 深圳市华星光电技术有限公司 | 一种goa驱动电路 |
| CN107134267B (zh) * | 2017-05-27 | 2018-07-13 | 惠科股份有限公司 | 移位暂存电路及其应用的显示面板 |
| CN109427277B (zh) * | 2017-08-31 | 2020-11-03 | 京东方科技集团股份有限公司 | 移位寄存器单元、驱动方法、栅极驱动电路和显示装置 |
| KR102633064B1 (ko) * | 2018-11-12 | 2024-02-06 | 삼성디스플레이 주식회사 | 스테이지 및 이를 포함하는 발광 제어 구동부 |
| CN209265989U (zh) | 2018-12-06 | 2019-08-16 | 北京京东方技术开发有限公司 | 移位寄存器、发光控制电路、显示面板 |
| CN113096606B (zh) * | 2019-12-23 | 2022-11-04 | 深圳市柔宇科技股份有限公司 | Goa电路、显示面板及电子装置 |
| CN111312322B (zh) * | 2020-03-12 | 2023-06-02 | 深圳市华星光电半导体显示技术有限公司 | 一种移位寄存器单元、栅极驱动电路以及显示面板 |
| CN112706609A (zh) | 2021-01-22 | 2021-04-27 | 国网安徽省电力有限公司淮北供电公司 | 一种电力灾害故障应急检修装置 |
| CN113257178B (zh) | 2021-05-20 | 2022-07-12 | 武汉华星光电技术有限公司 | 驱动电路及显示面板 |
| CN113643669B (zh) * | 2021-08-03 | 2022-09-27 | 武汉华星光电技术有限公司 | Goa电路及显示面板 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021360A (zh) * | 2012-10-11 | 2013-04-03 | 友达光电股份有限公司 | 可防止漏电的栅极驱动电路 |
| CN103035218A (zh) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | 一种移位寄存器单元、栅极驱动电路及显示器件 |
| CN103050106A (zh) * | 2012-12-26 | 2013-04-17 | 京东方科技集团股份有限公司 | 栅极驱动电路、显示模组和显示器 |
| CN203366700U (zh) * | 2013-08-09 | 2013-12-25 | 京东方科技集团股份有限公司 | 移位寄存器单元、移位寄存器与显示装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040097503A (ko) * | 2003-05-12 | 2004-11-18 | 엘지.필립스 엘시디 주식회사 | 쉬프트 레지스터 |
| CN101783124B (zh) * | 2010-02-08 | 2013-05-08 | 北京大学深圳研究生院 | 栅极驱动电路单元、栅极驱动电路及显示装置 |
| CN103077689B (zh) * | 2013-01-15 | 2015-06-03 | 北京大学深圳研究生院 | 移位寄存器单元、栅极驱动电路、数据驱动电路及显示器 |
-
2013
- 2013-08-09 CN CN201310347123.8A patent/CN103474038B/zh active Active
- 2013-11-21 WO PCT/CN2013/087574 patent/WO2015018141A1/zh not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021360A (zh) * | 2012-10-11 | 2013-04-03 | 友达光电股份有限公司 | 可防止漏电的栅极驱动电路 |
| CN103035218A (zh) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | 一种移位寄存器单元、栅极驱动电路及显示器件 |
| CN103050106A (zh) * | 2012-12-26 | 2013-04-17 | 京东方科技集团股份有限公司 | 栅极驱动电路、显示模组和显示器 |
| CN203366700U (zh) * | 2013-08-09 | 2013-12-25 | 京东方科技集团股份有限公司 | 移位寄存器单元、移位寄存器与显示装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12387805B2 (en) | 2019-12-13 | 2025-08-12 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device, display device, and electronic device |
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| CN103474038B (zh) | 2016-11-16 |
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