CN113421516A - Shift register and display panel - Google Patents
Shift register and display panel Download PDFInfo
- Publication number
- CN113421516A CN113421516A CN202110714265.8A CN202110714265A CN113421516A CN 113421516 A CN113421516 A CN 113421516A CN 202110714265 A CN202110714265 A CN 202110714265A CN 113421516 A CN113421516 A CN 113421516A
- Authority
- CN
- China
- Prior art keywords
- switch
- pull
- module
- electrically connected
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- 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
Abstract
The application is applicable to the technical field of display, and provides a shift register and a display panel. The shift register comprises a pre-charging module, an output module, a pull-down module, a first pull-down control module, a first pull-down maintaining module and a first pull-down auxiliary module. When the display panel is powered off, the first pull-down auxiliary module pulls down the potential of the control end of the first pull-down maintaining module, so that the potential of the control end of the first pull-down maintaining module is reduced. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a shift register and a display panel.
Background
The conventional shift register includes an output module, a pull-down maintaining module, and a pull-down control module. The output module receives the clock signal and outputs a grid scanning signal according to the clock signal. When the clock signal is converted from high level to low level, the pull-down control module outputs a control signal and transmits the control signal to the control end of the pull-down maintaining module. The pull-down maintaining module receives the control signal and pulls down the grid scanning signal and the electric potential of the control end of the output module according to the control signal to clear the signal.
When the display panel is powered off (for example, power off), the potential of the control end of the pull-down maintaining module is continuously at a high voltage, which causes a logic signal error and causes an abnormal picture display problem.
Disclosure of Invention
The embodiment of the application provides a shift register and a display panel, when the display panel is powered down, a first pull-down auxiliary module can pull down the potential of a control end of a first pull-down maintaining module, so that the potential of the control end of the first pull-down maintaining module is reduced. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
In a first aspect, an embodiment of the present application provides a shift register, which includes a pre-charge module, an output module, a pull-down module, a first pull-down control module, a first pull-down maintaining module, and a first pull-down auxiliary module; the pre-charging module is used for receiving a first grid signal output by a front-stage shift register and outputting a pre-charging voltage signal according to the first grid signal; the output module is used for receiving a clock signal and the pre-charging voltage signal and outputting a grid scanning signal according to the clock signal and the pre-charging voltage signal; the pull-down module is used for pulling down the grid scanning signal and the potential of the control end of the output module; the first pull-down control module is used for outputting a first control signal; the first pull-down maintaining module is used for pulling down the grid scanning signal and the potential of the control end of the output module according to the first control signal, and the first pull-down auxiliary module is used for controlling a preset low potential to pull down the potential of the control end of the first pull-down maintaining module when power is off.
In a possible implementation manner of the first aspect, the pre-charge module includes a first switch, a first end of the first switch is electrically connected to a third end of the first switch, and a second end of the first switch is electrically connected to the control end of the output module;
the third terminal of the first switch is used for receiving the first grid signal, and the second terminal of the first switch is used for outputting the pre-charging voltage signal.
In one possible implementation manner of the first aspect, the output module includes a second switch and a third switch;
the first end of the second switch and the first end of the third switch are both used for receiving the clock signal, the second end of the second switch is used for outputting a second grid signal required by a rear-stage shift register, the second end of the third switch is used for outputting the grid scanning signal, and the third end of the second switch and the third end of the third switch are both electrically connected with the pre-charging module.
In one possible implementation manner of the first aspect, the pull-down module includes a fourth switch and a fifth switch;
the first end of the fourth switch is electrically connected with the control end of the output module, the first end of the fifth switch is electrically connected with the output end of the output module, the second end of the fourth switch and the second end of the fifth switch are both electrically connected with a preset low potential, and the third end of the fourth switch and the third end of the fifth switch are both used for receiving a third grid signal output by the rear-stage shift register.
In one possible implementation manner of the first aspect, the first pull-down maintaining module includes a sixth switch and a seventh switch;
the first end of the sixth switch is electrically connected with the control end of the output module, the first end of the seventh switch is electrically connected with the output end of the output module, the second end of the sixth switch and the second end of the seventh switch are both electrically connected with a preset low potential, and the third end of the sixth switch and the third end of the seventh switch are both electrically connected with the first pull-down control module.
In a possible implementation manner of the first aspect, the first pull-down assisting module includes an eighth switch, a first end of the eighth switch is electrically connected to the control end of the first pull-down maintaining module, a second end of the eighth switch is electrically connected to a preset low potential, and a third end of the eighth switch is configured to receive a first auxiliary voltage signal;
when the first auxiliary voltage signal reaches a first starting voltage, the eighth switch controls the preset low potential to pull down the potential of the control end of the first pull-down maintaining module; the first auxiliary voltage signal reaches a first turn-on voltage upon power down.
In a possible implementation manner of the first aspect, the shift register further includes:
the second pull-down control module is used for outputting a second control signal;
the control end of the second pull-down maintaining module is electrically connected with the second pull-down control module; the second pull-down maintaining module is used for pulling down the grid scanning signal and the potential of the control end of the output module according to the second control signal; and
and the second pull-down auxiliary module is used for pulling down the potential of the control end of the second pull-down maintaining module under the condition of power failure.
In one possible implementation manner of the first aspect, the second pull-down maintaining module includes a ninth switch and a tenth switch;
the first end of the ninth switch is electrically connected with the control end of the output module, the first end of the tenth switch is electrically connected with the output end of the output module, the second end of the ninth switch and the second end of the tenth switch are both electrically connected with a preset low potential, and the third end of the ninth switch and the third end of the tenth switch are both electrically connected with the second pull-down control module.
In a possible implementation manner of the first aspect, the second pull-down assisting module includes an eleventh switch, a first end of the eleventh switch is electrically connected to the control end of the second pull-down maintaining module, a second end of the eleventh switch is electrically connected to a preset low potential, and a third end of the eleventh switch is configured to receive a second auxiliary voltage signal;
when the second auxiliary voltage signal reaches a second starting voltage, the eleventh switch controls the preset low potential to pull down the potential of the control end of the second pull-down maintaining module; the second auxiliary voltage signal reaches a second turn-on voltage in the event of a power failure.
In a second aspect, an embodiment of the present application provides a display panel, which includes an array substrate, a color film substrate, and a liquid crystal layer, where the array substrate is provided with a plurality of pixel units, a plurality of gate lines, and a plurality of cascaded shift registers according to any one of the first aspect, the plurality of gate lines are connected to the plurality of pixel units in a one-to-one correspondence manner, and the plurality of shift registers are connected to the plurality of gate lines in a one-to-one correspondence manner.
Compared with the prior art, the embodiment of the application has the advantages that:
when the display panel is powered off, the first pull-down auxiliary module can pull down the potential of the control end of the first pull-down maintaining module, so that the potential of the control end of the first pull-down maintaining module is reduced. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a block diagram of a shift register according to an embodiment of the present disclosure;
FIG. 2 is a circuit diagram of a shift register according to an embodiment of the present disclosure;
FIG. 3 is a schematic block diagram of a shift register according to a second embodiment of the present disclosure;
FIG. 4 is a circuit diagram of a shift register according to a second embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an array substrate in a display panel according to a third embodiment of the present application;
fig. 6 is a schematic structural diagram of a display panel according to a third embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in the specification of this application and the appended claims, the term "if" may be interpreted contextually as "when …" or "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The first embodiment is as follows:
fig. 1 is a schematic block diagram of a shift register according to an embodiment of the present application. Referring to fig. 1, the shift register includes a pre-charge module, an output module, a pull-down module, a first pull-down control module, a first pull-down maintaining module, and a first pull-down auxiliary module.
Specifically, the pre-charge module is used for receiving a first gate signal output by a pre-stage shift register and outputting a pre-charge voltage signal according to the first gate signal.
The control end of the output module is electrically connected with the pre-charging module, and the output module receives the clock signal and the pre-charging voltage signal and outputs a grid scanning signal according to the clock signal and the pre-charging voltage signal.
And the pull-down module is electrically connected with the control end of the output module and the output end of the output module respectively. When the clock signal is ended (the high level is converted into the low level), the pull-down module pulls down the grid scanning signal and the potential of the control end of the output module.
The first pull-down control module is used for generating a first control signal according to a preset program and transmitting the first control signal to a control end of the first pull-down maintaining module.
The control end of the first pull-down maintaining module is electrically connected with the first pull-down control module. The first pull-down maintaining module is used for pulling down the grid scanning signal and the electric potential of the control end of the output module according to the first control signal.
When the display panel is powered off, the first pull-down auxiliary module controls a preset low potential to pull down the potential of the control end of the first pull-down maintaining module, so that the potential of the control end of the first pull-down maintaining module is reduced. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
Fig. 2 is a circuit diagram of a shift register according to an embodiment of the present disclosure. Referring to fig. 2, the shift register includes a precharge module 100, an output module 200, a pull-down module 300, a first pull-down control module 400, a first pull-down maintaining module 500, and a first pull-down auxiliary module 600.
The pre-charge module 100 includes a first switch T1, a first terminal of the first switch T1 is electrically connected to a third terminal of the first switch T1, and a second terminal of the first switch T1 is electrically connected to the control terminal q (n) of the output module 200. The third terminal of the first switch T1 receives the first gate signal F (n-2) output by the shift register of the previous stage, generates the precharge voltage signal according to the first gate signal F (n-2), and outputs the precharge voltage signal from the second terminal of the first switch T1.
It should be noted that the previous stage shift register refers to a shift register before the current shift register, and the previous stage shift register may be a shift register adjacent to the current shift register or a shift register not adjacent to the current shift register.
The output module 200 includes a second switch T2 and a third switch T3. A first terminal of the second switch T2 and a first terminal of the third switch T3 are both configured to receive a clock signal, a second terminal of the second switch T2 is configured to output a second gate signal f (n) required by the shift register of the next stage, and a second terminal of the third switch T3 is configured to output a gate scan signal g (n). The third terminal of the second switch T2 and the third terminal of the third switch T3 are electrically connected to the precharge module 100 as the control terminal q (n) of the output module 200.
It should be noted that the shift register at the next stage refers to a shift register behind the current shift register, and the shift register at the next stage may be a shift register adjacent to the current shift register or a shift register not adjacent to the current shift register.
The pull-down module 300 includes a fourth switch T4 and a fifth switch T5. A first terminal of the fourth switch T4 is electrically connected to the control terminal q (n) of the output module 200, a first terminal of the fifth switch T5 is electrically connected to the output terminal q (n) of the output module 200, a second terminal of the fourth switch T4 and a second terminal of the fifth switch T5 are both electrically connected to the preset low potential VSS, and a third terminal of the fourth switch T4 and a third terminal of the fifth switch T5 are both configured to receive a third gate signal F (n +4) output by the post-stage shift register. When the clock signal is ended, the third gate signal F (n +4) drives the fourth switch T4 and the fifth switch T5 to be turned on, the fourth switch T4 controls the voltage level of the control terminal q (n) of the preset low-potential VSS pull-down output module 200, and the fifth switch T5 controls the voltage level of the preset low-potential VSS pull-down gate scan signal g (n).
The first pull-down maintaining module 500 includes a sixth switch T6 and a seventh switch T7. A first terminal of the sixth switch T6 is electrically connected to the control terminal q (n) of the output module 200, a first terminal of the seventh switch T7 is electrically connected to the output terminal of the output module 200, a second terminal of the sixth switch T6 and a second terminal of the seventh switch T7 are both electrically connected to the preset low potential VSS, and a third terminal of the sixth switch T6 and a third terminal of the seventh switch T7 are electrically connected to the first pull-down control module 400 as the control terminal of the first pull-down maintaining module 500. When the clock signal is ended, the first control signal controls the sixth switch T6 and the seventh switch T7 to be turned on, the sixth switch T6 controls the voltage level of the control terminal q (n) of the preset low-potential VSS pull-down output module 200, and the seventh switch T7 controls the voltage level of the preset low-potential VSS pull-down gate scan signal g (n).
The first pull-down assisting module 600 includes an eighth switch T8, a first terminal of the eighth switch T8 is electrically connected to the control terminal of the first pull-down maintaining module 500, and a second terminal of the eighth switch T8 is electrically connected to the preset low potential VSS. The third terminal of the eighth switch T8 is configured to receive the first auxiliary voltage signal PDS, and when the first auxiliary voltage signal PDS reaches the first turn-on voltage, the eighth switch T8 controls the preset low voltage VSS to pull down the voltage of the control terminal of the first pull-down sustain module 500.
When the display panel is powered down, the first auxiliary voltage signal PDS reaches the first start voltage, the eighth switch T8 is switched to the on state, and the preset low potential VSS pulls down the potential of the control terminal of the first pull-down maintaining module 500, so that the potential of the control terminal of the first pull-down maintaining module 500 is lowered. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
It should be noted that the first auxiliary voltage signal PDS may be generated by the controller in the display panel after recognizing the power failure.
Example two:
fig. 3 is a schematic block diagram of a shift register according to another embodiment of the present application. Referring to fig. 3, the shift register includes a precharge module, an output module, a pull-down module, a first pull-down control module, a first pull-down maintaining module and a first pull-down auxiliary module in the first embodiment, and the connection relationship, circuit connection and operation principle of the above modules are the same as those of the first embodiment, and are not described herein again.
As shown in fig. 3, the shift register of the present embodiment further includes a second pull-down control module, a second pull-down maintaining module and a second pull-down auxiliary module.
The second pull-down control module is used for generating a second control signal according to a preset program and transmitting the second control signal to the second pull-down maintaining module.
The control end of the second pull-down maintaining module is electrically connected with the second pull-down control module. The second pull-down maintaining module is used for pulling down the grid scanning signal and the electric potential of the control end of the output module according to a second control signal.
When the display panel is powered off, the second pull-down auxiliary module can pull down the potential of the control end of the second pull-down maintaining module, so that the potential of the control end of the second pull-down maintaining module is reduced. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
Fig. 4 is a circuit diagram of a shift register according to another embodiment of the present disclosure. Referring to fig. 4, the second pull-down maintaining module 800 includes a ninth switch T9 and a tenth switch T10. A first terminal of the ninth switch T9 is electrically connected to the control terminal q (n) of the output module 200, a first terminal of the tenth switch T10 is electrically connected to the output terminal of the output module 200, a second terminal of the ninth switch T9 and a second terminal of the tenth switch T10 are both electrically connected to the preset low potential VSS, and a third terminal of the ninth switch T9 and a third terminal of the tenth switch T10 are both electrically connected to the second pull-down control module 700. When the clock signal is ended, the second control signal controls the ninth switch T9 and the tenth switch T10 to be turned on, the ninth switch T9 controls the voltage level of the control terminal q (n) of the preset low-potential VSS pull-down output module 200, and the tenth switch T10 controls the voltage level of the preset low-potential VSS pull-down gate scan signal g (n).
The second pull-down assisting module 900 includes an eleventh switch T11, a first end of the eleventh switch T11 is electrically connected to the control end of the second pull-down maintaining module 800, and a second end of the eleventh switch T11 is electrically connected to the preset low voltage VSS. The third terminal of the eleventh switch T11 is configured to receive the second auxiliary voltage signal, and when the second auxiliary voltage signal reaches the second turn-on voltage, the eleventh switch T11 controls the preset low voltage VSS to pull down the voltage of the control terminal of the second pull-down sustain module 800.
When the display panel is powered off, the second auxiliary voltage signal reaches the second start voltage, the eleventh switch T11 is switched to the on state, and the preset low potential VSS pulls down the potential of the control end of the second pull-down maintaining module 800, so that the potential of the control end of the second pull-down maintaining module 800 is lowered. Therefore, the problem that the abnormal picture display is caused by the error of logic signals due to the fact that the electric potential of the control end of the pull-down maintaining module is continuously in high voltage is solved.
It should be noted that the first auxiliary voltage signal and the second auxiliary voltage signal may be the same voltage signal, that is, the same auxiliary voltage signal controls the eighth switch T8 and the eleventh switch T11. The first and second auxiliary voltage signals may be two voltage signals, which individually control the eighth and eleventh switches T8 and T11, respectively.
Example three:
as shown in fig. 5 and 6, the display panel includes an array substrate 50, a color film substrate 70, and a liquid crystal layer 60, where the liquid crystal layer 60 is disposed between the color film substrate 70 and the array substrate 50. The array substrate 50 is provided with a plurality of pixel units 53, a plurality of gate lines 52 and a plurality of cascaded shift registers 51, wherein the shift registers 51 are the shift registers 51; the plurality of gate lines 52 and the plurality of pixel units 53 are connected in a one-to-one correspondence, and the plurality of shift registers 51 and the plurality of gate lines 52 are connected in a one-to-one correspondence.
The display panel provided by the embodiment of the application can pull down the potential of the control end of the maintaining module when the power failure occurs, and the problem that the picture display is abnormal due to the fact that the potential of the control end of the maintaining module is continuously at high voltage is avoided.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A shift register comprises a pre-charging module, an output module, a pull-down module, a first pull-down control module and a first pull-down maintaining module; the pre-charging module is used for receiving a first grid signal output by a front-stage shift register and outputting a pre-charging voltage signal according to the first grid signal; the output module is used for receiving a clock signal and the pre-charging voltage signal and outputting a grid scanning signal according to the clock signal and the pre-charging voltage signal; the pull-down module is used for pulling down the grid scanning signal and the potential of the control end of the output module; the first pull-down control module is used for outputting a first control signal; the first pull-down maintaining module is configured to pull down the gate scan signal and the potential of the control end of the output module according to the first control signal, and is characterized in that:
the power-down protection circuit further comprises a first pull-down auxiliary module, wherein the first pull-down auxiliary module is used for controlling a preset low potential to pull down the potential of the control end of the first pull-down maintaining module when the power is down.
2. The shift register of claim 1, wherein the pre-charge module comprises a first switch, a first terminal of the first switch is electrically connected to a third terminal of the first switch, and a second terminal of the first switch is electrically connected to the control terminal of the output module;
the third terminal of the first switch is used for receiving the first grid signal, and the second terminal of the first switch is used for outputting the pre-charging voltage signal.
3. The shift register of claim 1, wherein the output module comprises a second switch and a third switch;
the first end of the second switch and the first end of the third switch are both used for receiving the clock signal, the second end of the second switch is used for outputting a second grid signal required by a rear-stage shift register, the second end of the third switch is used for outputting the grid scanning signal, and the third end of the second switch and the third end of the third switch are both electrically connected with the pre-charging module.
4. The shift register of claim 1, wherein the pull-down module comprises a fourth switch and a fifth switch;
the first end of the fourth switch is electrically connected with the control end of the output module, the first end of the fifth switch is electrically connected with the output end of the output module, the second end of the fourth switch and the second end of the fifth switch are both electrically connected with a preset low potential, and the third end of the fourth switch and the third end of the fifth switch are both used for receiving a third grid signal output by the rear-stage shift register.
5. The shift register of claim 1, wherein the first pull-down sustain module comprises a sixth switch and a seventh switch;
the first end of the sixth switch is electrically connected with the control end of the output module, the first end of the seventh switch is electrically connected with the output end of the output module, the second end of the sixth switch and the second end of the seventh switch are both electrically connected with a preset low potential, and the third end of the sixth switch and the third end of the seventh switch are both electrically connected with the first pull-down control module.
6. The shift register of claim 1, wherein the first pull-down auxiliary module comprises an eighth switch, a first terminal of the eighth switch is electrically connected to the control terminal of the first pull-down maintaining module, a second terminal of the eighth switch is electrically connected to a preset low potential, and a third terminal of the eighth switch is configured to receive a first auxiliary voltage signal;
when the first auxiliary voltage signal reaches a first starting voltage, the eighth switch controls the preset low potential to pull down the potential of the control end of the first pull-down maintaining module; the first auxiliary voltage signal reaches a first turn-on voltage upon power down.
7. The shift register according to any of claims 1 to 6, further comprising:
the second pull-down control module is used for outputting a second control signal;
the control end of the second pull-down maintaining module is electrically connected with the second pull-down control module; the second pull-down maintaining module is used for pulling down the grid scanning signal and the potential of the control end of the output module according to the second control signal; and
and the second pull-down auxiliary module is used for pulling down the potential of the control end of the second pull-down maintaining module under the condition of power failure.
8. The shift register of claim 7, wherein the second pull-down sustain module comprises a ninth switch and a tenth switch;
the first end of the ninth switch is electrically connected with the control end of the output module, the first end of the tenth switch is electrically connected with the output end of the output module, the second end of the ninth switch and the second end of the tenth switch are both electrically connected with a preset low potential, and the third end of the ninth switch and the third end of the tenth switch are both electrically connected with the second pull-down control module.
9. The shift register of claim 7, wherein the second pull-down auxiliary module comprises an eleventh switch, a first terminal of the eleventh switch is electrically connected to the control terminal of the second pull-down maintaining module, a second terminal of the eleventh switch is electrically connected to a preset low potential, and a third terminal of the eleventh switch is configured to receive a second auxiliary voltage signal;
when the second auxiliary voltage signal reaches a second starting voltage, the eleventh switch controls the preset low potential to pull down the potential of the control end of the second pull-down maintaining module; the second auxiliary voltage signal reaches a second turn-on voltage in the event of a power failure.
10. A display panel is characterized by comprising an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate is provided with a plurality of pixel units, a plurality of grid lines and a plurality of cascaded shift registers according to any one of claims 1 to 9, the plurality of grid lines are connected with the plurality of pixel units in a one-to-one correspondence manner, and the plurality of shift registers are connected with the plurality of grid lines in a one-to-one correspondence manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714265.8A CN113421516A (en) | 2021-06-25 | 2021-06-25 | Shift register and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714265.8A CN113421516A (en) | 2021-06-25 | 2021-06-25 | Shift register and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113421516A true CN113421516A (en) | 2021-09-21 |
Family
ID=77716862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110714265.8A Pending CN113421516A (en) | 2021-06-25 | 2021-06-25 | Shift register and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113421516A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140098013A1 (en) * | 2012-10-09 | 2014-04-10 | Beijing Boe Optoelectronics Technology Co., Ltd. | Shift register, integrated gate line driving circuit, array substrate and display |
| CN108648715A (en) * | 2018-07-17 | 2018-10-12 | 惠科股份有限公司 | The driving method of shift registor, display panel and shift registor |
| CN108806634A (en) * | 2018-07-17 | 2018-11-13 | 惠科股份有限公司 | The driving method of shift registor, display panel and shift registor |
| US20180335814A1 (en) * | 2016-06-28 | 2018-11-22 | Boe Technology Group Co., Ltd. | Shift register unit, gate drive circuit and display apparatus having the same, and driving method thereof |
| CN109285496A (en) * | 2018-12-07 | 2019-01-29 | 合肥鑫晟光电科技有限公司 | Shift register cell, gate driving circuit and its driving method, display device |
| CN109448657A (en) * | 2018-12-26 | 2019-03-08 | 惠科股份有限公司 | Shift registor and gate driving circuit |
| CN109448656A (en) * | 2018-12-26 | 2019-03-08 | 惠科股份有限公司 | Shift registor and gate driving circuit |
-
2021
- 2021-06-25 CN CN202110714265.8A patent/CN113421516A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140098013A1 (en) * | 2012-10-09 | 2014-04-10 | Beijing Boe Optoelectronics Technology Co., Ltd. | Shift register, integrated gate line driving circuit, array substrate and display |
| US20180335814A1 (en) * | 2016-06-28 | 2018-11-22 | Boe Technology Group Co., Ltd. | Shift register unit, gate drive circuit and display apparatus having the same, and driving method thereof |
| CN108648715A (en) * | 2018-07-17 | 2018-10-12 | 惠科股份有限公司 | The driving method of shift registor, display panel and shift registor |
| CN108806634A (en) * | 2018-07-17 | 2018-11-13 | 惠科股份有限公司 | The driving method of shift registor, display panel and shift registor |
| CN109285496A (en) * | 2018-12-07 | 2019-01-29 | 合肥鑫晟光电科技有限公司 | Shift register cell, gate driving circuit and its driving method, display device |
| CN109448657A (en) * | 2018-12-26 | 2019-03-08 | 惠科股份有限公司 | Shift registor and gate driving circuit |
| CN109448656A (en) * | 2018-12-26 | 2019-03-08 | 惠科股份有限公司 | Shift registor and gate driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10210835B2 (en) | Gate driver on array circuit and driving method thereof, and display device | |
| US10460671B2 (en) | Scanning driving circuit and display apparatus | |
| CN107395006B (en) | Overcurrent protection circuit and liquid crystal display | |
| CN110782855A (en) | G0A circuit and display panel | |
| CN107731186A (en) | A kind of control circuit, control method and display device | |
| CN105304041A (en) | Scanning driving device | |
| US8754838B2 (en) | Discharge circuit and display device with the same | |
| CN104575411A (en) | Liquid crystal display and bidirectional shift temporary storage device thereof | |
| US20210225250A1 (en) | Shift register and driving method thereof, gate driving circuit and display apparatus | |
| US11069272B2 (en) | Shift register, gate drive circuit, display panel, and driving method | |
| US8564585B2 (en) | Source driver and display device with protection unit | |
| KR20160055311A (en) | Source driver circuit and display device for reducing power consumed by non-display area of display panel | |
| US20170169782A1 (en) | Scanning driving circuits and the liquid crystal devices with the same | |
| CN101131487A (en) | Power supply circuit and LCD using the same | |
| US20210090481A1 (en) | Clock Signal Test Circuit, Control Method Thereof, Display Panel and Test Device | |
| US20120176163A1 (en) | Driving stage and related driving method | |
| CN114974163A (en) | Scanning driving circuit, array substrate and display panel | |
| KR20120054320A (en) | Circuit for controlling non-signal of plat panel display device | |
| CN108962121B (en) | Shift register circuit and display device | |
| US20200012368A1 (en) | Shift register and touch display apparatus thereof | |
| US7750719B2 (en) | Level shifter concept for fast level transient design | |
| CN106448539A (en) | Shifting register unit and driving method thereof, gate drive circuit and display device | |
| CN110189682B (en) | Grid driving circuit and display panel thereof | |
| CN101667824B (en) | Voltage level converting circuit | |
| CN113421516A (en) | Shift register and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210921 |
|
| RJ01 | Rejection of invention patent application after publication |