CN115708152A - Display substrate, driving method thereof and display device - Google Patents
Display substrate, driving method thereof and display device Download PDFInfo
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- CN115708152A CN115708152A CN202110957876.5A CN202110957876A CN115708152A CN 115708152 A CN115708152 A CN 115708152A CN 202110957876 A CN202110957876 A CN 202110957876A CN 115708152 A CN115708152 A CN 115708152A
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Abstract
The invention provides a display substrate, a driving method thereof and a display device, wherein the display substrate comprises: a substrate base including a display area and a non-display area surrounding the display area; the display area comprises a plurality of data lines; the non-display area comprises a reference voltage line, a power management integrated circuit used for providing working voltage for the display substrate and a control circuit coupled with each data line, wherein when the voltage of the input end of the power management integrated circuit is smaller than a preset voltage value, the control circuit is used for controlling the data lines to be conducted with the reference voltage line under the control of a control signal. The method is used for avoiding the phenomenon of flashing of the TFT-LCD when the TFT-LCD is turned off.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a driving method thereof and a display device.
Background
Currently, for a Thin Film Transistor Liquid Crystal Display (TFT-LCD), the turn-off discharge mode is that when the Voltage at the input terminal of the system drops to the Under Voltage Lock Out (UVLO) of the Power Management Integrated Circuit (PMIC), the Power supply (Power) of the PMIC starts to discharge, and the voltages on the common electrode line (VCOM) and the data line (data line) are discharged respectively. Because the VCOM voltage and the data voltage are not consistent in discharge speed, the liquid crystal deflects due to the voltage difference between two ends of the liquid crystal in the discharge process, and when abnormal display exists in a backlight or other places, the abnormal display can penetrate through the liquid crystal to be displayed on the surface of a panel, so that a user can see the phenomenon of flashing (garpage).
When the current KSF powder LED is used as the backlight of the blue-light-proof panel, due to the light emission delay characteristic of the fluoride phosphor in the KSF backlight, millisecond-level red afterglow occurs when the backlight is turned off. If the panel is still transmitting light during this time, the user will see a red flash.
As can be seen, the existing TFT-LCD has the technical problem of flashing when the LCD is turned off.
Disclosure of Invention
The invention provides a display substrate, a driving method thereof and a display device, which are used for avoiding the phenomenon of flashing of a TFT-LCD when the TFT-LCD is turned off.
In a first aspect, an embodiment of the present invention provides a display substrate, including:
a substrate base including a display area and a non-display area surrounding the display area;
the display area comprises a plurality of data lines;
the non-display area comprises a reference voltage line, a power management integrated circuit used for providing working voltage for the display substrate and a control circuit coupled with each data line, wherein when the voltage of the input end of the power management integrated circuit is smaller than a preset voltage value, the control circuit is used for controlling the plurality of data lines to be conducted with the reference voltage line under the control of a control signal.
In one possible implementation, the control circuit includes a plurality of control switches disposed in one-to-one correspondence with the plurality of data lines, gates of the respective control switches are coupled together, a first pole of the respective control switches is coupled to the corresponding data line, and a second pole of the respective control switches is coupled to the reference voltage line.
In one possible implementation manner, the display area includes a plurality of pixels arranged in an array, the plurality of pixels includes N different colors, the non-display area includes N connection wires, a second pole of a control switch connected to a data line to which the pixels of the same color are coupled is coupled to one end of the same connection wire, and the other end of each connection wire is coupled to the reference voltage line, where N is an integer greater than 2.
The non-display area further comprises a detection circuit coupled with the power management integrated circuit and the gates of the control switches respectively, the detection circuit is used for outputting the control signals when detecting that the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signals to the gates of the control switches and controlling the conduction of the control switches, wherein when the power management integrated circuit discharges, the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value.
In a possible implementation manner, the detection circuit is further configured to output a cut-off signal when detecting that the voltage at the input end of the power management integrated circuit is not less than the preset voltage value, load the cut-off signal to the gate of each control switch, and control each control switch to be turned off, where, when the power management integrated circuit is powered on and works, the voltage at the input end of the power management integrated circuit is not less than the preset voltage value.
In a possible implementation manner, the plurality of control switches are all N-type transistors, the control signal is a high level signal, and the cut-off signal is a low level signal.
In a second aspect, an embodiment of the present invention provides a display device, including:
the display substrate of any one of the above, an opposing substrate disposed opposite the display substrate, and a liquid crystal layer disposed between the display substrate and the opposing substrate.
In a third aspect, an embodiment of the present invention provides a method for driving a display substrate, including:
when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signal to the control circuit;
the control circuit controls the plurality of data lines to be conducted with the reference voltage line under the control of the control signal.
In one possible implementation, the method further includes:
when the voltage of the input end of the power management integrated circuit is not less than the preset voltage value, loading a cut-off signal to the control circuit;
the control circuit controls each control switch of a plurality of control switches which are arranged in one-to-one correspondence with the plurality of data lines and are included in the control circuit to be turned off under the control of the turn-off signal.
In a possible implementation manner, the loading the control signal to the control circuit when the voltage at the input terminal of the power management integrated circuit is smaller than a preset voltage value includes:
and when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, the control signals are loaded on the grids of a plurality of control switches which are arranged in the control circuit and correspond to the data lines one to one.
The invention has the following beneficial effects:
the embodiment of the invention provides a display substrate, a driving method thereof and a display device, wherein a display area in the display substrate comprises a plurality of data lines, a non-display area comprises a reference voltage line, a power management integrated circuit used for providing working voltage for the display substrate and a control circuit coupled with each data line, and the control circuit is used for controlling the plurality of data lines to be conducted with the reference voltage line under the control of a control signal when the voltage of an input end of the power management integrated circuit is smaller than a preset voltage value. If predetermine the voltage value and be UVLO, when power management integrated circuit's input voltage is less than UVLO, power management integrated circuit discharges, at this moment, control circuit control many data lines and reference voltage line switch on, like this, many data lines and reference voltage line can keep unanimous discharge velocity, liquid crystal capacitor both ends voltage is unanimous in the follow-up liquid crystal disply device based on this display substrate preparation, and liquid crystal is not deflected, even if the unusual scintillation of being shaded can also not see through display device to the red phenomenon of shutdown flashing has been avoided.
Drawings
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display substrate according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a display substrate according to an embodiment of the invention;
FIG. 5 is a timing diagram of an embodiment of a power management integrated circuit in a display substrate;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method of driving a display substrate according to an embodiment of the present invention;
fig. 8 is a flowchart of one method of driving a display substrate according to an embodiment of the invention.
Description of reference numerals:
1-a substrate base plate; a-a display area; b-a non-display area; d-a data line; VCOM-reference voltage line; 2-a power management integrated circuit; 3-a control circuit; VDD-input voltage; 30-a control switch; a P-pixel; an L-connecting lead; r-red pixels; g-green pixels; b-blue pixels; g-grid lines; 4-a switching transistor; 5-detection circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "including" or "comprising" and the like in the present invention is intended to mean that the elements or items listed before the word "comprise" or "comprising" and the like, include the elements or items listed after the word and their equivalents, but do not exclude other elements or items.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And like reference numerals refer to like or similar elements or elements having like or similar functions throughout.
In the prior art, during power discharge of the PMIC, the voltages on VCOM and data line are discharged respectively. Because the VCOM voltage and the data voltage are not consistent in discharge speed, the liquid crystal deflects due to the voltage difference between two ends of the liquid crystal in the discharge process, and when abnormal display exists in a backlight or other places, the abnormal display can penetrate through the liquid crystal display to reach the surface of a panel, and a user can see the abnormal flashing.
At present, the system time sequence is mainly modified, the system black insertion time is increased during shutdown, and the black picture is always displayed on the panel during the backlight flashing period, so that the backlight flashing cannot enter the eyes of a user through the panel. However, by modifying the panel specification, the user modifies the scheme of the relevant time sequence, which violates the VESA specification and reduces the user experience.
In view of this, embodiments of the present invention provide a display substrate, a driving method thereof, and a display device, so as to avoid the phenomenon of flashing when a power-off operation is performed, and improve user experience.
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present invention, where the display substrate includes:
a substrate base plate 1, the substrate base plate 1 including a display area a and a non-display area B surrounding the display area a;
the display area A comprises a plurality of data lines D;
the non-display region B includes a reference voltage line VCOM, a power management integrated circuit 2 for providing an operating voltage to the display substrate, and a control circuit 3 coupled to each of the data lines D, wherein when an input voltage VDD of the power management integrated circuit 2 is smaller than a preset voltage value, the control circuit 3 is configured to control the data lines D to be conductive to the reference voltage line VCOM under the control of a control signal DIS.
In the embodiment of the present invention, the substrate base plate 1 may be a rigid substrate, and may also be a flexible substrate, which is not limited herein. The substrate 1 includes a display area a and a non-display area B surrounding the display area a, and the distribution of the display area a and the non-display area B may be as shown in fig. 1, and of course, other distributions of the display area a and the non-display area B may also be set as required, which is not limited herein.
The display area a includes a plurality of data lines D, and the specific number of the plurality of data lines D may be set according to a display requirement of the display substrate, which is not limited herein.
The non-display region B includes a reference voltage line VCOM for loading a common electrode voltage, a power management integrated circuit 2 for supplying an operating voltage to the display substrate, and a control circuit 3 coupled to each of the data lines D, and the connection relationship between the power management integrated circuit 2 and the control circuit 3 may be as shown in fig. 2.
When the input voltage VDD of the power management integrated circuit 2 is smaller than a preset voltage value, the control circuit 3 is configured to control the data lines D to be conducted with the reference voltage line VCOM under the control of the control signal DIS. The preset voltage value can be UVLO, when the power of the power management ic 2 is turned off, the input voltage VDD of the power management ic 2 is smaller than UVLO, at this time, under the control of the control signal DIS, the control circuit 3 controls the data lines D and the reference voltage line VCOM to be turned on, so that the data lines D and the reference voltage line VCOM can keep the consistent discharge speed, the voltages at the two ends of the liquid crystal capacitor in the liquid crystal display device prepared based on the display substrate are consistent, the liquid crystal is not deflected, and the display device cannot be passed through even if the backlight abnormally flickers, thereby avoiding the phenomenon of flashing when the display device is turned off, and improving the user experience.
In an embodiment of the present invention, as shown in fig. 2, which is a schematic structural diagram of a display substrate, the control circuit 3 includes a plurality of control switches 30 disposed in a one-to-one correspondence with the plurality of data lines D, gates of the control switches 30 are coupled together, a first pole of each control switch 30 is coupled to the corresponding data line D, and a second pole of each control switch 30 is coupled to the reference voltage line VCOM.
The control circuit 3 includes a plurality of control switches 30 corresponding to the plurality of data lines D one to one, the number of the plurality of control switches 30 is the same as the number of the plurality of data lines D, for example, the display area a is provided with 1000 data lines D, correspondingly, the control circuit 3 includes 1000 control switches 30, and each data line D is connected to one control switch 30. The gates of the respective control switches 30 are coupled together such that control of the respective control switches 30 is achieved by control of the gates. In addition, the first pole of each of the control switches 30 is coupled to the corresponding data line D, and the second pole of each of the control switches 30 is coupled to the reference voltage line VCOM, so that the plurality of data lines D and the reference voltage line VCOM can be coupled together by the plurality of control switches 30 in the control circuit 3.
Each control switch 30 of the plurality of control switches 30 may be a Thin Film Transistor (TFT) or a Metal Oxide Semiconductor field effect Transistor (MOS), and is not limited herein. In the same display substrate, each control switch 30 of the plurality of control switches 30 may be a transistor manufactured by the same process, thereby simplifying the manufacturing cost.
The first pole of each of the plurality of control switches 30 may serve as its source and, correspondingly, the second pole may serve as its drain, depending on the direction of flow of the signal. It is also possible that the first pole of each control switch 30 of the plurality of control switches 30 is used as the drain thereof, and correspondingly, the second pole of each control switch 30 is used as the source thereof, which is not limited herein.
In an embodiment of the present invention, as shown in fig. 3, a structural diagram of a display substrate is shown, where the display area a includes a plurality of pixels P arranged in an array, the plurality of pixels P include N different colors, the non-display area B includes N connection wires, a second pole of a control switch 30 connected to a data line D coupled to a pixel P of the same color is coupled to one end of the same connection wire, and the other end of each connection wire is coupled to the reference voltage line VCOM, where N is an integer greater than 2.
The display area a includes a plurality of pixels P arranged in an array, where the plurality of pixels P may be m × n pixels P, where m and n are both integers greater than 1, and the number of m and n may be set according to a display requirement of the display panel, which is not limited herein. The plurality of pixels P include N different colors, where N is an integer greater than 2, the N different colors may be red, green, and blue, and the N different colors may also be red, green, blue, and white, which is not limited herein. In fig. 4, three colors of the plurality of pixels P including a red pixel r, a green pixel g, and a blue pixel b are illustrated.
The non-display area B includes N connection lead lines, and the specific number of the N connection lead lines is the same as the number of the pixel colors included in the display area a, and may be set according to the actual application requirement, which is not limited herein. For example, when the plurality of pixels P include three colors including a red pixel r, a green pixel g, and a blue pixel b, the number of the connection leads is three.
The second pole of the control switch 30 connected to the data line D to which the same color pixel P is coupled to one end of the same connection line, and the other end of each connection line is coupled to the reference voltage line VCOM, so that each data line D and the reference voltage line VCOM are connected together through each connection line and the control switch 30.
Still referring to fig. 3, the display substrate may further include a gate line G for controlling each row of pixels P to scan line by line and a switching transistor 4 for controlling the charging of the pixels P at specific positions, and may further include other structures, which may be configured according to the related art, and will not be described in detail herein. The arrangement of the pixels P on the display substrate may be set according to actual needs, and is not limited herein.
In an embodiment of the present invention, as shown in fig. 4, the non-display area B further includes a detection circuit 5 respectively coupled to the power management integrated circuit 2 and the gates of the control switches 30, where the detection circuit 5 is configured to output the control signal DIS and load the control signal DIS to the gates of the control switches 30 to control the conduction of the control switches 30 when detecting that the input voltage VDD of the power management integrated circuit 2 is smaller than the preset voltage value, and when the power management integrated circuit 2 discharges, the input voltage VDD of the power management integrated circuit 2 is smaller than the preset voltage value.
Still referring to fig. 4, the non-display area B further includes a detection circuit 5 respectively coupled to the power management integrated circuit 2 and the gate of each control switch 30, and the detection circuit 5 is configured to output the control signal DIS when detecting that the voltage VDD at the input end of the power management integrated circuit 2 is smaller than the predetermined voltage value. If the preset voltage value is UVLO, when the power management integrated circuit 2 discharges, the voltage VDD at the input end of the power management integrated circuit 2 is smaller than the UVLO. The detection circuit 5 may further load the control signal DIS to the gate of each control switch 30 to control each control switch 30 to be turned on, so that the same discharging speed may be maintained between each data line D and the reference voltage line VCOM in the discharging process of the power management integrated circuit 2, thereby effectively avoiding the flashing phenomenon during shutdown.
In this embodiment of the present invention, the detection circuit 5 is further configured to output a cut-off signal when detecting that the voltage VDD at the input end of the power management integrated circuit 2 is not less than the preset voltage value, load the cut-off signal to the gate of each control switch 30, and control each control switch 30 to be cut off, where when the power management integrated circuit 2 is powered on and operated, the voltage VDD at the input end of the power management integrated circuit 2 is not less than the preset voltage value.
Still referring to fig. 4, the detection circuit 5 is further configured to output a cut-off signal when detecting that the voltage VDD at the input end of the power management integrated circuit 2 is not less than the preset voltage value, and if the preset voltage value is UVLO, when the power management integrated circuit 2 is powered on and works, the voltage VDD at the input end of the power management integrated circuit 2 is greater than or equal to UVLO. The detection circuit 5 may also apply the turn-off signal to the gate of each of the control switches 30, thereby controlling each of the control switches 30 to turn off. In this way, during the power-on operation of the power management integrated circuit 2, since each of the control switches 30 is turned off, the reference voltage line VCOM and each of the data lines D do not affect each other, thereby ensuring the display effect of the display substrate.
In the embodiment of the present invention, the plurality of control switches 30 are all N-type transistors, the control signal DIS is a high level signal, and the cut-off signal is a low level signal.
When the power management ic 2 discharges, the high level signal can control each of the control switches 30 to be turned on, so that the same discharge speed can be obtained between the reference voltage line VCOM and each of the data lines D, and the phenomenon of flashing when the power management ic is turned off is avoided. Accordingly, when the power management integrated circuit 2 is powered on, the low level signal can control each of the control switches 30 to be turned off, so that the reference voltage line VCOM and each of the data lines D are not affected by each other, thereby ensuring the display effect of the display substrate.
It should be noted that, in conjunction with the timing diagram of the power management integrated circuit 2 shown in fig. 5, when the input voltage VDD of the power management integrated circuit 2 is smaller than the preset voltage value, the power management integrated circuit 2 starts to discharge, and when the input voltage VDD drops to another preset voltage value XAO smaller than the preset voltage value (for example, UVLO), the signal from the detection circuit 5 may be pulled up to a high level, and then the reference voltage line VCOM is conducted with each of the data lines D, so that the reference voltage line VCOM and each of the data lines D have the same discharge speed, thereby avoiding the phenomenon of flash red when the power management integrated circuit 2 is turned off.
Based on the same inventive concept, fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device includes the display substrate, the opposite substrate disposed opposite to the display substrate, and the liquid crystal layer disposed between the display substrate and the opposite substrate.
The display device may be a TFT-LCD, and the principle of the display device to solve the problem is similar to the display substrate 100, so the implementation of the display device may refer to the implementation of the display substrate 100, and repeated details are not repeated. In addition, other structures included in the display device may be provided with reference to the related art, and will not be described in detail herein.
In a specific implementation process, the display device provided in the embodiment of the present invention may be a mobile phone as shown in fig. 6, and certainly, the display device provided in the embodiment of the present invention may also be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Other essential components of the display device are understood by those skilled in the art, and are not described herein or limited by the present invention.
Based on the same inventive concept, as shown in fig. 7, an embodiment of the present invention further provides a driving method of a display substrate, including:
s101: when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signal to the control circuit;
s102: the control circuit controls the plurality of data lines to be conducted with the reference voltage line under the control of the control signal.
In the specific implementation process, the specific implementation process from step S101 to step S102 is as follows:
the specific structure of the display substrate in the driving method may refer to the description of the foregoing parts, and repeated descriptions are omitted. First, when the input voltage VDD of the power management integrated circuit 2 is smaller than the preset voltage value, the control signal DIS is loaded to the control circuit 3, or when the power management integrated circuit 2 discharges, the control signal DIS is loaded to the control circuit 3. Then, the control circuit 3 controls the data lines D to be turned on by the reference voltage line VCOM under the control of the control signal DIS, so as to ensure that the reference voltage line VCOM and the data lines D have the same discharging speed in the discharging process, thereby avoiding the phenomenon of flashing when the display device is turned off.
As shown in fig. 8, the method further comprises:
s201: when the voltage of the input end of the power management integrated circuit is not less than the preset voltage, loading a cut-off signal to the control circuit;
s202: the control circuit controls each control switch of a plurality of control switches which are arranged in one-to-one correspondence with the plurality of data lines and are included in the control circuit to be turned off under the control of the turn-off signal.
In the specific implementation process, the specific implementation process from step S201 to step S202 is as follows:
first, when the voltage VDD at the input terminal of the power management integrated circuit 2 is greater than or equal to the preset voltage value, a cut-off signal is loaded to the control circuit 3, which may be loading a cut-off signal to the control circuit 3 when the power management integrated circuit 2 is powered on. Then, the control circuit 3 controls, under the control of the cut-off signal, each control switch 30 of the plurality of control switches 30 that are included in the control circuit 3 and are disposed in one-to-one correspondence with the plurality of data lines D to be cut off, so that the reference voltage line VCOM does not affect each data line D during the power-on operation of the power management integrated circuit 2, thereby ensuring the display effect of the display substrate.
In the embodiment of the present invention, step S101: when the voltage at the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signal DIS to the control circuit, including:
and when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signal DIS to the gates of a plurality of control switches which are arranged in one-to-one correspondence with the plurality of data lines and are included in the control circuit.
When the input voltage VDD of the power management integrated circuit 2 is smaller than the preset voltage value, the control signal DIS is applied to the gates of the control switches 30 that are included in the control circuit 3 and are disposed in one-to-one correspondence with the data lines D, so that the reference voltage line VCOM is turned on with each of the data lines D under the control of the control signal DIS, which ensures that the reference voltage line VCOM and each of the data lines D have the same discharge speed during the discharge process of the power management integrated circuit 2, thereby avoiding the flash red phenomenon during shutdown.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display substrate, comprising:
a substrate base including a display area and a non-display area surrounding the display area;
the display area comprises a plurality of data lines;
the non-display area comprises a reference voltage line, a power management integrated circuit used for providing working voltage for the display substrate and a control circuit coupled with each data line, wherein when the voltage of the input end of the power management integrated circuit is smaller than a preset voltage value, the control circuit is used for controlling the data lines to be conducted with the reference voltage line under the control of a control signal.
2. The display substrate of claim 1, wherein the control circuit comprises a plurality of control switches disposed in a one-to-one correspondence with the plurality of data lines, gates of the respective control switches being coupled together, a first pole of the respective control switches being coupled to the corresponding data lines, and a second pole of the respective control switches being coupled to the reference voltage line.
3. The display substrate according to claim 2, wherein the display region includes a plurality of pixels arranged in an array, the plurality of pixels includes N different colors, the non-display region includes N connection leads, a second pole of a control switch connected to a data line to which the pixels of the same color are coupled is coupled to one end of the same connection lead, and the other end of each connection lead is coupled to the reference voltage line, wherein N is an integer greater than 2.
4. The display substrate according to claim 3, wherein the non-display area further comprises a detection circuit coupled to the power management integrated circuit and the gate of each of the control switches, respectively, and configured to output the control signal and apply the control signal to the gate of each of the control switches to control the conduction of each of the control switches when detecting that the voltage at the input of the power management integrated circuit is less than the predetermined voltage value, and wherein the voltage at the input of the power management integrated circuit is less than the predetermined voltage value when the power management integrated circuit discharges.
5. The display substrate of claim 4, wherein the detection circuit is further configured to output a turn-off signal when detecting that the voltage at the input terminal of the power management integrated circuit is not less than the preset voltage value, and apply the turn-off signal to the gate of each of the control switches to control each of the control switches to turn off, wherein the voltage at the input terminal of the power management integrated circuit is not less than the preset voltage value when the power management integrated circuit is powered on.
6. The display substrate of claim 5, wherein the plurality of control switches are all N-type transistors, the control signal is a high level signal, and the cut-off signal is a low level signal.
7. A display device, comprising:
the display substrate of any one of claims 1-6, an opposing substrate disposed opposite the display substrate, and a liquid crystal layer disposed between the display substrate and the opposing substrate.
8. A method of driving a display substrate according to any one of claims 1 to 6, comprising:
when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, loading the control signal to the control circuit;
the control circuit controls the plurality of data lines to be conducted with the reference voltage line under the control of the control signal.
9. The driving method according to claim 8, characterized in that the method further comprises:
when the voltage of the input end of the power management integrated circuit is not less than the preset voltage value, loading a cut-off signal to the control circuit;
the control circuit controls each control switch of a plurality of control switches which are arranged in one-to-one correspondence with the plurality of data lines and are included in the control circuit to be turned off under the control of the turn-off signal.
10. The driving method of claim 8, wherein the loading the control signal to the control circuit when the input voltage of the power management integrated circuit is less than the preset voltage value comprises:
and when the voltage of the input end of the power management integrated circuit is smaller than the preset voltage value, the control signals are loaded on the grids of a plurality of control switches which are arranged in the control circuit and correspond to the data lines one to one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110957876.5A CN115708152A (en) | 2021-08-19 | 2021-08-19 | Display substrate, driving method thereof and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110957876.5A CN115708152A (en) | 2021-08-19 | 2021-08-19 | Display substrate, driving method thereof and display device |
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| CN115708152A true CN115708152A (en) | 2023-02-21 |
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