CN106652869B - Control circuit for display panel, driving method and display device - Google Patents
Control circuit for display panel, driving method and display device Download PDFInfo
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- CN106652869B CN106652869B CN201610973641.4A CN201610973641A CN106652869B CN 106652869 B CN106652869 B CN 106652869B CN 201610973641 A CN201610973641 A CN 201610973641A CN 106652869 B CN106652869 B CN 106652869B
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- 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
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Abstract
The invention provides a control circuit for a display panel, a driving method and a display device. The control circuit for the display panel is used for controlling the display panel, and the display panel comprises a shielding electrode, a grid line and a grid drive circuit; the corresponding shielding electrodes are respectively arranged above a row of grid lines and used for shielding the row of grid lines, and the control circuit for the display panel comprises a shielding electrode control unit; the shielding electrode is connected with the common electrode through the shielding electrode control unit; and the shielding electrode control unit is used for controlling the corresponding shielding electrode to be in a floating state when one row of grid lines are opened. The invention effectively reduces the time required by charging and discharging grid signals, ensures the pixel charging time, reduces the electric leakage area and ensures the high aperture ratio frame of the pixel.
Description
Technical Field
The invention relates to the technical field of display panel control, in particular to a control circuit, a driving method and a display device for a display panel.
Background
In order to improve the aperture opening ratio of the pixel and reduce light leakage at the periphery of the grid line, a shielding electrode is adopted to shield part of the grid line. In the prior art, when the grid line is opened, the shielding electrode arranged above the grid line is still connected with the public electrode, and because the load capacitance of the grid line is greatly increased after the grid line is shielded, the drive delay of the grid line is greatly increased, so that the time required by charging and discharging of a grid signal is prolonged, the requirement of pixel charging cannot be met when the ultra-high resolution is applied, the electric leakage area is increased, and the requirement of a high aperture ratio frame of the pixel cannot be met.
Disclosure of Invention
The invention mainly aims to provide a control circuit, a driving method and a display device for a display panel, and solves the problems that in the prior art, when a grid line is opened, a shielding electrode arranged above the grid line is still connected with a common electrode, and due to the fact that load capacitance of the grid line is greatly increased after the grid line is shielded, drive delay of the grid line is greatly increased, the time required by charging and discharging of grid signals is prolonged, when the control circuit is applied to ultrahigh resolution, the requirement of pixel charging cannot be met, an electric leakage area is increased, and the requirement of a high-aperture-ratio frame of a pixel cannot be met.
In order to achieve the above object, the present invention provides a control circuit for a display panel, the display panel including a shielding electrode, a gate line, and a gate driving circuit; the corresponding shielding electrodes are respectively arranged above a row of grid lines and used for shielding the row of grid lines, and the control circuit for the display panel comprises a shielding electrode control unit;
the shielding electrode is connected with the common electrode through the shielding electrode control unit;
and the shielding electrode control unit is used for controlling the corresponding shielding electrode to be in a floating state when one row of grid lines are opened.
In practice, the shielding electrode control unit comprises a plurality of control modules;
and the control module is respectively connected with the corresponding shielding electrode, the corresponding row grid driving signal output end of the grid driving circuit and the common electrode, and is used for controlling the shielding electrode to be in a floating state when the potential of the grid driving signal output by the row grid driving signal output end is a first level and controlling the shielding electrode to be connected with the common electrode when the potential of the grid driving signal output by the row grid driving signal output end is a second level.
In practice, the control module comprises:
the input end of the inverter is connected with the corresponding row grid electrode driving signal output end and is used for carrying out inversion operation on the grid electrode driving signal output by the row grid electrode driving signal output end; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the phase inverter, the first electrode of the switch transistor is connected with the shielding electrode, the second electrode of the switch transistor is connected with the common electrode, and the switch transistor is used for controlling the corresponding shielding electrode to be in a floating state when the phase inverter outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the phase inverter outputs the first level.
In practice, the control module comprises:
the controller is respectively connected with the corresponding row of gate drive signal output ends, the adjacent previous row of gate drive signal output ends and the adjacent next row of gate drive signal output ends and is used for outputting a second level when the potential of the corresponding row of gate drive signals is a first level, the potential of the adjacent previous row of gate drive signals is a first level or the potential of the adjacent next row of gate drive signals is a first level, and outputting the first level when the corresponding row of gate drive signals, the adjacent previous row of gate drive signals and the adjacent next row of gate drive signals are all second levels; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the controller, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode and used for controlling the corresponding shielding electrode to be in a floating state when the controller outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the controller outputs the first level.
In practice, the control module connected to the shielding electrode disposed above the first row of gate lines includes:
the first controller is respectively connected with the first row of gate driving signal output ends, the second row of gate driving signal output ends and the initial signal output ends, and is used for outputting a second level when the electric potential of the first row of gate driving signals is a first level, the electric potential of the second row of gate driving signals is a first level or the initial signal is a first level, and outputting the first level when the first row of gate driving signals, the second row of gate driving signals and the initial signal are all second levels; and the number of the first and second groups,
and the control electrode of the first switching transistor is connected with the output end of the first controller, the first electrode of the first switching transistor is connected with the first shielding electrode, and the second electrode of the first switching transistor is connected with the common electrode, and is used for controlling the first shielding electrode to be in a floating state when the first controller outputs a second level and controlling the first shielding electrode to be connected with the common electrode when the first controller outputs a first level.
In practice, the shielding electrode control unit comprises a plurality of control modules;
the control module is respectively connected with the corresponding shielding electrode, the common electrode and a node in the corresponding row gate drive circuit, and is used for controlling the corresponding shielding electrode to be in a floating state under the control of the node when the corresponding row gate drive circuit controls the corresponding row gate line to be opened, and controlling the corresponding shielding electrode to be connected with the common electrode when the corresponding row gate drive circuit controls the corresponding row gate line to be closed.
In practice, the control module includes a switching transistor;
the control electrode of the switch transistor is connected with a pull-down node in the corresponding row gate drive circuit, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode; the switch transistor is used for being switched on when the potential of the pull-down node is at a first level and being switched off when the potential of the pull-down node is at a second level.
In implementation, when at least two pull-down nodes are arranged in the corresponding row gate drive circuit, the control module comprises at least two switch transistors;
the control electrode of each switch transistor is respectively connected with one of the at least two pull-down nodes of the corresponding row, the first electrode of each switch transistor is connected with the corresponding shielding electrode, the second electrode of each switch transistor is connected with the common electrode, and each switch transistor is used for being switched on when the potential of the pull-down node is at a first level and being switched off when the potential of the pull-down node is at a second level.
The invention also provides a driving method of a display panel, wherein the display panel comprises the control circuit, and the driving method comprises the following steps: when one row of grid lines are opened, the shielding electrode control unit controls the corresponding shielding electrode to be in a floating state.
The invention also provides a display device which comprises the control circuit of the display panel.
Compared with the prior art, the control circuit, the driving method and the display device of the display panel have the advantages that the shielding electrode control unit is additionally arranged between the shielding electrode and the common electrode, so that the shielding electrode is in a floating state when a grid signal is charged and discharged, and the shielding electrode is controlled to be connected with the common electrode after the grid signal is kept closed, so that the time required by charging and discharging of the grid signal is effectively reduced, the pixel charging time is ensured, the electric leakage area is reduced, and the high-aperture-ratio frame of the pixel is ensured.
Drawings
Fig. 1A is a structural diagram of a control circuit for a display panel according to an embodiment of the present invention;
fig. 1B is a schematic diagram of the relationship between the voltage V _ shield on the shielding electrode SCom and the gate driving signals Vgout and Vcom output by the gate line disposed under the shielding electrode SCom;
FIG. 2 is a block diagram of a control circuit for a display panel according to another embodiment of the present invention;
FIG. 3 is a circuit diagram of a first embodiment of a control circuit for a display panel according to the present invention;
FIG. 4 is a circuit diagram of a second embodiment of a control circuit for a display panel according to the present invention;
FIG. 5 is a block diagram of a control circuit for a display panel according to another embodiment of the present invention;
FIG. 6 is a circuit diagram of a third embodiment of a control circuit for a display panel according to the present invention;
FIG. 7 is a circuit diagram of a fourth embodiment of a control circuit for a display panel according to the present invention;
FIG. 8 is a circuit diagram of one embodiment of a gate drive circuit having two pull-down nodes;
fig. 9 is a schematic diagram of potentials of the VHD1, the VHD2, and the PD1 and a potential of the PD2 in the gate driver circuit shown in fig. 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The control circuit for the display panel is applied to the display panel;
the display panel comprises a shielding electrode, a grid line and a grid driving circuit; the corresponding shielding electrodes are respectively arranged above a row of grid lines and used for shielding the row of grid lines;
as shown in fig. 1A, the control circuit for a display panel according to an embodiment of the present invention includes a shielding electrode control unit 11;
the shielding electrode SCom is connected with a common electrode outputting a common electrode voltage Vcom through the shielding electrode control unit;
the shielding electrode control unit 11 is configured to control the corresponding shielding electrode SCom to be in a floating state when one row of gate lines is opened.
The control circuit for the display panel controls the corresponding shielding electrode to be in a floating state when a row of grid lines are opened through the shielding electrode control unit, so that the potential of the corresponding shielding electrode is increased along with the increase of the potential of the grid lines, the problem that the time required by charging and discharging of grid signals is prolonged due to parasitic capacitance between the grid lines and the shielding electrode is solved, the pixel charging time is ensured, meanwhile, the electric leakage area is reduced, and the high-aperture-ratio frame of the pixel is ensured.
In specific implementation, the control circuit for a display panel according to the embodiment of the present invention further controls the corresponding shielding electrode to be connected to the common electrode through the shielding electrode control unit 11 after the row of gate lines is closed.
According to the control circuit for the display panel, the shielding electrode control unit 11 is additionally arranged between the shielding electrode and the common electrode, so that the shielding electrode is in a floating state when a grid signal is charged and discharged, and the shielding electrode is controlled to be connected with the common electrode after the grid signal is kept closed, so that the time required by charging and discharging of the grid signal is effectively reduced, the pixel charging time is ensured, meanwhile, the electric leakage area is reduced, and the high-aperture-ratio frame of the pixel is ensured.
As shown in fig. 1B, the relationship between the voltage V _ shield on the shielding electrode SCom and the gate driving signals Vgout and Vcom output by the gate line disposed under the shielding electrode SCom is schematically illustrated. When Vgout is low, V _ shield is equal to Vcom, and when Vgout is high, SCom is in a floating state, and thus the voltage value of V _ shield increases as Vgout increases.
Specifically, the shielding electrode control unit may include a plurality of control modules;
as shown in fig. 2, one of the control modules 21 is respectively connected to the corresponding shielding electrode Scom, the common electrode for outputting the common electrode voltage Vcom, and the corresponding row gate driving signal output terminal Gn of the gate driving circuit, and is configured to control the shielding electrode Scom to be in a floating state when the electric potential of the gate driving signal output by the row gate driving signal output terminal Gn is a first level, and to control the shielding electrode Scom to be connected to the common electrode when the electric potential of the gate driving signal output by the row gate driving signal output terminal Gn is a second level.
In a specific implementation, the shielding electrode control unit includes a plurality of control modules corresponding to the plurality of shielding electrodes and controlled by the gate driving signals, and each control module controls a state of the corresponding shielding electrode.
Specifically, the control module may include:
the input end of the inverter is connected with the corresponding row grid electrode driving signal output end and is used for carrying out inversion operation on the grid electrode driving signal output by the row grid electrode driving signal output end; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the phase inverter, the first electrode of the switch transistor is connected with the shielding electrode, the second electrode of the switch transistor is connected with the common electrode, and the switch transistor is used for controlling the corresponding shielding electrode to be in a floating state when the phase inverter outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the phase inverter outputs the first level.
As shown in fig. 3, the control module includes:
an inverter 30, the input end of which is connected to the corresponding row gate driving signal output end Gn, for performing an inversion operation on the gate driving signal output by the row gate driving signal output end Gn; and the number of the first and second groups,
and a switching transistor MC having a gate connected to the output terminal of the inverter 30, a source connected to the shielding electrode SCom, and a drain connected to the common electrode for outputting the common electrode voltage Vcom, and configured to control the corresponding shielding electrode SCom to be in a floating state when the inverter 30 outputs a low level, and to control the corresponding shielding electrode SCcom to be connected to the common electrode when the inverter 30 outputs a high level.
In the embodiment of the present invention shown in fig. 3, MC is an n-type thin film transistor, when Gn outputs a high level, inverter 30 outputs a low level, MC is turned off, and SCom is in a floating state, and when Gn outputs a low level, inverter 30 outputs a high level, MC is turned on, and SCom is turned on with the common electrode.
In practical operation, MC may also be a p-type thin film transistor, and in this case, the control module 21 may only include the switching transistor MC.
According to another specific embodiment, the control module comprises:
the controller is respectively connected with the corresponding row of gate drive signal output ends, the adjacent previous row of gate drive signal output ends and the adjacent next row of gate drive signal output ends and is used for outputting a second level when the potential of the corresponding row of gate drive signals is a first level, the potential of the adjacent previous row of gate drive signals is a first level or the potential of the adjacent next row of gate drive signals is a first level, and outputting a first level when the corresponding row of gate drive signals, the adjacent previous row of gate drive signals and the adjacent next row of gate drive signals are all first levels; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the controller, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode and used for controlling the corresponding shielding electrode to be in a floating state when the controller outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the controller outputs the first level.
In another embodiment, as shown in fig. 4, the control module comprises:
the controller 40 is respectively connected with the corresponding row gate driving signal output terminal Gn, the adjacent previous row gate driving signal output terminal Gn-1 and the adjacent next row gate driving signal output terminal Gn +1, and is used for outputting a low level when Gn outputs a high level, Gn-1 outputs a high level or Gn +1 outputs a high level, and outputting a high level when Gn outputs a low level, Gn-1 outputs a low level and Gn +1 also outputs a low level; and the number of the first and second groups,
and a switch transistor MC having a gate connected to the output terminal of the controller 40, a source connected to the corresponding shielding electrode SCom, and a drain connected to the common electrode outputting the common electrode voltage Vcom, and configured to control the corresponding shielding electrode SCom to be in a floating state when the controller 40 outputs a low level, and to control the corresponding shielding electrode SCom to be connected to the common electrode when the controller 40 outputs a high level.
In the embodiment shown in fig. 4, the controller 40 is a 3-input nor gate. The embodiment of the control module shown in fig. 4 of the present invention can disconnect the shielding electrode SCom from the common electrode in advance under the control of the adjacent previous row of gate driving signals, and postpone the recovery of the conduction between SCom and the common electrode under the control of the adjacent next row of gate driving signals, so as to confirm that the influence of the shielding electrode on the charging and discharging of the gate line is minimized, thereby ensuring the pixel charging time.
In the embodiment shown in fig. 4, MC is an n-type transistor. In actual operation, the MC may also be p-type transistors, where the controller 40 needs to output a high level when Gn outputs a high level, Gn-1 outputs a high level, or Gn +1 outputs a high level, and outputs a low level when Gn outputs a low level, Gn-1 outputs a low level, and Gn +1 also outputs a low level.
In practical operation, the control module connected to the shielding electrode disposed above the first row of gate lines includes:
the first controller is respectively connected with the first row of gate driving signal output ends, the second row of gate driving signal output ends and the initial signal output ends, and is used for outputting a second level when the electric potential of the first row of gate driving signals is a first level, the electric potential of the second row of gate driving signals is a first level or the initial signal is a first level, and outputting a first level when the first row of gate driving signals, the second row of gate driving signals and the initial signal are all first levels; and the number of the first and second groups,
and the control electrode of the first switching transistor is connected with the output end of the first controller, the first electrode of the first switching transistor is connected with the first shielding electrode, and the second electrode of the first switching transistor is connected with the common electrode, and is used for controlling the first shielding electrode to be in a floating state when the first controller outputs a second level and controlling the first shielding electrode to be connected with the common electrode when the first controller outputs a first level.
That is, the first row gate driving signal output terminal does not have the previous row gate driving signal output terminal, and the first controller is correspondingly connected with the start signal output terminal.
Specifically, the shielding electrode control unit comprises a plurality of control modules;
the control module is respectively connected with the corresponding shielding electrode, the common electrode and a node in the corresponding row gate drive circuit, and is used for controlling the corresponding shielding electrode to be in a floating state under the control of the node when the corresponding row gate drive circuit controls the corresponding row gate line to be opened, and controlling the corresponding shielding electrode to be connected with the common electrode when the corresponding row gate drive circuit controls the corresponding row gate line to be closed.
In actual operation, when the gate line is opened (or advanced or delayed for a certain time, such as 1 line time), the shielding electrode and the common electrode are disconnected, and when the gate line is kept at a low level (closed), the shielding electrode and the common electrode are communicated, so that the shielding electrode maintains the voltage of the common electrode, and light leakage is avoided.
As shown in fig. 5, the control module 50 is connected to the corresponding shielding electrode SCom, the common electrode outputting the common electrode voltage Vcom, and the node PC in the corresponding row gate driving circuit GDC, and in actual operation, the node PC may be one or more.
In practical operation, the Gate driving circuit in the corresponding row may be included in a GOA (Gate On Array, Array substrate row driving) circuit, that is, may be a GOA unit in the corresponding row.
Specifically, the control module may include a switching transistor;
the control electrode of the switch transistor is connected with a pull-down node in the corresponding row gate drive circuit, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode; the switch transistor is used for being switched on when the potential of the pull-down node is at a first level and being switched off when the potential of the pull-down node is at a second level.
That is, the node PC may be a pull-down node.
As shown in fig. 6, the control module includes a switching transistor MC;
the gate of the switch transistor MC is connected to the pull-down node PD in the gate driving circuit GDC of the corresponding row, the source of the switch transistor MC is connected to the corresponding shielding electrode SCom, and the drain of the switch transistor MC is connected to the common electrode that outputs the common electrode voltage Vcom;
the switching transistor MC is configured to be turned on when the potential of the pull-down node PD is at a high level and to be turned off when the potential of the pull-down node PD is at a low level.
In fig. 6, the output terminal Gout of the gate driving circuit GDC is connected to the corresponding gate line GL.
In the embodiment shown in fig. 6, MC is an n-type transistor, and the potential of PD is at a low level when the gate drive signal output from the gate drive circuit GDC is at a high level, and the potential of PD is at a high level when the gate drive signal output from the gate drive circuit GDC is at a low level.
In specific implementation, the MC may also be a p-type transistor, and only the potential of the corresponding signal that controls the on or off of the transistor needs to be changed, and the type of the MC is not limited herein.
Specifically, as shown in fig. 7, when two pull-down nodes are provided in the corresponding row gate driving circuit: the control module comprises a first switch transistor M1 and a second switch transistor M2 when the first pull-down node PD1 and the second pull-down node PD2 are connected;
the gate of M1 is connected with PD1, and the gate of M2 is connected with PD 2;
the source of M1 and the source of M2 are both connected to shield electrode SCom;
the drain of M1 and the drain of M2 are both connected to a common electrode that outputs a common electrode voltage Vcom;
m1 is for turning on when the potential of PD1 is high level and for turning off when the potential of PD1 is low level;
m2 is for turning on when the potential of PD2 is high level, and for turning off when the potential of PD2 is low level.
In fig. 7, the output terminal Gout of the gate driving circuit GDC is connected to the corresponding gate line GL.
In the embodiment shown in fig. 7, both M1 and M2 are n-type transistors, and when the potential of PD1 is high or the potential of PD2 is high, the corresponding row gate driver circuit outputs low, and when the potential of PD1 and the potential of PD2 are both low, the corresponding row gate driver circuit outputs high;
the embodiment of the control module as shown in fig. 7 may ensure that the shielding electrode SCom and the common electrode are conductive when the corresponding row gate driving circuit outputs a low level, and the shielding electrode SCom and the common electrode are non-conductive when the corresponding row gate driving circuit outputs a high level, so that the shielding electrode SCom floats.
As shown in fig. 8, a row of gate driving circuits includes eighteen transistors T1-T18, an Input terminal Input, a first high level Output terminal outputting a first high level VHD1, a second high level Output terminal outputting a second high level VHD2, a Carry signal Output terminal Carry Out, a reset terminal Rst1, a first reference voltage Output terminal outputting a first reference voltage Vref1, a second reference voltage Output terminal outputting a second reference voltage Vref2, and a gate driving signal Output terminal Output;
in the specific embodiment of the gate driving circuit shown in fig. 8, the gate driving circuit includes a pull-up node PU and two pull-down nodes: a first pull-down node PD1 and a second pull-down node PD 2;
in fig. 8, PD _ CN1 is the first pull-down control node, and PD _ CN2 is the second pull-down control node.
In actual operation, when the Output outputs a low level, the PD1 and the PD2 alternately Output a high level, and when the Output outputs a high level, both the PD1 and the PD2 Output a low level.
Fig. 9 is a schematic diagram of the potential of PD1, the potential of PD2, and the voltages of VHD1 and VHD 2.
The driving method of the display panel is used for driving the display panel comprising the control circuit;
the driving method includes: when one row of grid lines are opened, the shielding electrode control unit controls the corresponding shielding electrode to be in a floating state.
Specifically, the driving method further includes: and when one row of grid lines is closed, the shielding electrode control unit controls the corresponding shielding electrode to be connected with the common electrode.
According to the driving method for the display panel, the shielding electrode is enabled to be in a floating state when the grid signal is charged and discharged through the shielding electrode control unit, and the shielding electrode is controlled to be connected with the common electrode after the grid signal is kept closed, so that the time required by charging and discharging of the grid signal is effectively reduced, the pixel charging time is ensured, meanwhile, the electric leakage area is reduced, and the high-aperture-ratio frame of the pixel is ensured.
The display device provided by the embodiment of the invention comprises the control circuit of the display panel.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A control circuit for a display panel, the display panel including a shield electrode, a gate line, and a gate driving circuit; the corresponding shielding electrodes are respectively arranged above a row of grid lines and used for shielding the row of grid lines, and the control circuit for the display panel comprises a shielding electrode control unit;
the shielding electrode is connected with the common electrode through the shielding electrode control unit;
and the shielding electrode control unit is used for controlling the corresponding shielding electrode to be in a floating state when one row of grid lines are opened.
2. The control circuit for a display panel according to claim 1, wherein the shielding electrode control unit includes a plurality of control modules;
and the control module is respectively connected with the corresponding shielding electrode, the corresponding row grid driving signal output end of the grid driving circuit and the common electrode, and is used for controlling the shielding electrode to be in a floating state when the potential of the grid driving signal output by the row grid driving signal output end is a first level and controlling the shielding electrode to be connected with the common electrode when the potential of the grid driving signal output by the row grid driving signal output end is a second level.
3. The control circuit for a display panel according to claim 2, wherein the control module comprises:
the input end of the inverter is connected with the corresponding row grid electrode driving signal output end and is used for carrying out inversion operation on the grid electrode driving signal output by the row grid electrode driving signal output end; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the phase inverter, the first electrode of the switch transistor is connected with the shielding electrode, the second electrode of the switch transistor is connected with the common electrode, and the switch transistor is used for controlling the corresponding shielding electrode to be in a floating state when the phase inverter outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the phase inverter outputs the first level.
4. The control circuit for a display panel according to claim 2, wherein the control module comprises:
the controller is respectively connected with the corresponding row of gate drive signal output ends, the adjacent previous row of gate drive signal output ends and the adjacent next row of gate drive signal output ends and is used for outputting a second level when the potential of the corresponding row of gate drive signals is a first level, the potential of the adjacent previous row of gate drive signals is a first level or the potential of the adjacent next row of gate drive signals is a first level, and outputting the first level when the corresponding row of gate drive signals, the adjacent previous row of gate drive signals and the adjacent next row of gate drive signals are all second levels; and the number of the first and second groups,
and the control electrode of the switch transistor is connected with the output end of the controller, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode and used for controlling the corresponding shielding electrode to be in a floating state when the controller outputs the second level and controlling the corresponding shielding electrode to be connected with the common electrode when the controller outputs the first level.
5. The control circuit for a display panel according to claim 4, wherein the control module connected to the shielding electrode disposed over the first row gate line comprises:
the first controller is respectively connected with the first row of gate driving signal output ends, the second row of gate driving signal output ends and the initial signal output ends, and is used for outputting a second level when the electric potential of the first row of gate driving signals is a first level, the electric potential of the second row of gate driving signals is a first level or the initial signal is a first level, and outputting the first level when the first row of gate driving signals, the second row of gate driving signals and the initial signal are all second levels; and the number of the first and second groups,
and the control electrode of the first switching transistor is connected with the output end of the first controller, the first electrode of the first switching transistor is connected with the first shielding electrode, and the second electrode of the first switching transistor is connected with the common electrode, and is used for controlling the first shielding electrode to be in a floating state when the first controller outputs a second level and controlling the first shielding electrode to be connected with the common electrode when the first controller outputs a first level.
6. The control circuit for a display panel according to claim 1, wherein the shielding electrode control unit includes a plurality of control modules;
the control module is respectively connected with the corresponding shielding electrode, the common electrode and a node in the corresponding row gate drive circuit, and is used for controlling the corresponding shielding electrode to be in a floating state under the control of the node when the corresponding row gate drive circuit controls the corresponding row gate line to be opened, and controlling the corresponding shielding electrode to be connected with the common electrode when the corresponding row gate drive circuit controls the corresponding row gate line to be closed.
7. The control circuit for a display panel according to claim 6, wherein the control module includes a switching transistor;
the control electrode of the switch transistor is connected with a pull-down node in the corresponding row gate drive circuit, the first electrode of the switch transistor is connected with the corresponding shielding electrode, and the second electrode of the switch transistor is connected with the common electrode; the switch transistor is used for being switched on when the potential of the pull-down node is at a first level and being switched off when the potential of the pull-down node is at a second level.
8. The control circuit for a display panel according to claim 6, wherein the control module includes at least two switching transistors when at least two pull-down nodes are provided in the corresponding row gate driving circuit;
the control electrode of each switch transistor is respectively connected with one of the at least two pull-down nodes of the corresponding row, the first electrode of each switch transistor is connected with the corresponding shielding electrode, the second electrode of each switch transistor is connected with the common electrode, and each switch transistor is used for being switched on when the potential of the pull-down node is at a first level and being switched off when the potential of the pull-down node is at a second level.
9. A driving method of a display panel including the control circuit according to claim 1, the driving method comprising: when one row of grid lines are opened, the shielding electrode control unit controls the corresponding shielding electrode to be in a floating state.
10. A display device characterized by comprising the control circuit of the display panel according to any one of claims 1 to 8.
Priority Applications (1)
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| EP3459449B1 (en) * | 2017-09-26 | 2023-04-26 | Nokia Technologies Oy | Apparatus for sensing biosignals |
| CN107622759B (en) * | 2017-10-19 | 2020-03-27 | 京东方科技集团股份有限公司 | Pixel control circuit, control method thereof and display |
| CN110380605B (en) * | 2019-07-11 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Flexible direct current transmission submodule |
| CN113920957B (en) * | 2021-10-29 | 2022-07-26 | 重庆惠科金渝光电科技有限公司 | Liquid crystal display device and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101533186A (en) * | 2008-01-11 | 2009-09-16 | 爱普生映像元器件有限公司 | Liquid crystal device and electronic apparatus |
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| JP3677011B2 (en) * | 2002-04-30 | 2005-07-27 | アルプス電気株式会社 | Liquid crystal display |
| CN100451784C (en) * | 2004-01-29 | 2009-01-14 | 夏普株式会社 | Display device |
| KR101439268B1 (en) * | 2008-02-22 | 2014-09-12 | 엘지디스플레이 주식회사 | Array Substrate of In-Plane Switching Mode Liquid Crystal Display Device |
| CN102736332B (en) * | 2012-02-22 | 2015-01-07 | 京东方科技集团股份有限公司 | Array substrate, liquid crystal display panel and liquid crystal display |
| CN103926727B (en) * | 2013-12-24 | 2017-08-25 | 上海天马微电子有限公司 | Touch-control display panel and display device |
| CN103698927B (en) * | 2013-12-31 | 2017-05-10 | 敦泰电子有限公司 | touch display device, drive circuit and drive method |
| CN104503627B (en) * | 2015-01-14 | 2017-06-09 | 京东方科技集团股份有限公司 | Touch-control structure, touch-control display panel and touch control display apparatus |
| CN104516167A (en) * | 2015-01-20 | 2015-04-15 | 京东方科技集团股份有限公司 | Array baseplate and display device |
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| CN101533186A (en) * | 2008-01-11 | 2009-09-16 | 爱普生映像元器件有限公司 | Liquid crystal device and electronic apparatus |
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