CN108051966B - Array substrate, control method, display panel and display device - Google Patents
Array substrate, control method, display panel and display device Download PDFInfo
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- CN108051966B CN108051966B CN201711190607.0A CN201711190607A CN108051966B CN 108051966 B CN108051966 B CN 108051966B CN 201711190607 A CN201711190607 A CN 201711190607A CN 108051966 B CN108051966 B CN 108051966B
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- power supply
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136204—Arrangements to prevent high voltage or static electricity failures
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
Abstract
The embodiment of the invention provides an array substrate, a control method, a display panel and a display device, relates to the technical field of display, and aims to improve the antistatic capacity of a pressure induction sensor and effectively relieve the damage of static electricity to the pressure induction sensor. The array substrate provided by the embodiment of the invention comprises: the pressure sensing sensor comprises a first input end and a second input end, and the first input end is connected with a common grounding end of the pressure sensing sensor through a first power supply wire; the electrostatic protection unit comprises a first end and at least one second end, the first end is connected with the common grounding end, and the second end is connected with the protection grounding end of the array substrate; the power supply control unit is connected with the second input end through a second power supply wire; the power supply control unit is used for controlling the pressure sensing sensor to be started or controlling the pressure sensing sensor to be in a high-resistance state; the resistance of the pressure induction sensor is larger than that of the electrostatic protection unit.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an array substrate, a control method, a display panel and a display device.
[ background of the invention ]
Along with the development of the touch display technology, the touch display technology can detect the size of pressing pressure during touch besides the touch position, and interaction between equipment and a user can be conveniently and quickly realized by detecting the size of the pressing pressure and the touch position. The important device for realizing the man-machine interaction is a pressure induction sensor.
During normal use of the touch display screen, static charges can be accumulated in the touch display screen due to some external factors, and the static charges can be discharged after being accumulated to a certain amount. Usually, the time of electrostatic discharge is very short, and a large amount of static charges are transferred to the pressure-sensitive sensor through the power cord of connecting the pressure-sensitive sensor in very short time to will lead to the pressure-sensitive sensor to suffer destruction, and then make touch-control display screen unable normal work.
[ summary of the invention ]
In view of this, embodiments of the present invention provide an array substrate, a control method, a display panel, and a display device, which can lead out static electricity introduced by a common ground terminal and other paths of a pressure-sensitive sensor, thereby improving the antistatic capability of the pressure-sensitive sensor and effectively alleviating damage of the static electricity to the pressure-sensitive sensor.
In a first aspect, an embodiment of the present invention provides an array substrate, where the array substrate includes a display area and a non-display area outside the display area;
the non-display area includes:
the device comprises a first power supply wire, at least one pressure sensing sensor, at least one electrostatic protection unit, a second power supply wire and a power supply control unit;
the pressure sensing sensor comprises a first input end and a second input end, and the first input end is connected with a common grounding end of the pressure sensing sensor through the first power supply wire;
the electrostatic protection unit comprises a first end and at least one second end, the first end is connected with the common grounding end, and the second end is connected with the protection grounding end of the array substrate;
the power supply control unit is connected with a second input end through the second power supply wire; the power supply control unit is used for controlling the pressure sensing sensor to be started or controlling the pressure sensing sensor to be in a high-resistance state;
wherein the resistance of the pressure sensing sensor is greater than the resistance of the electrostatic protection unit.
The above aspects and any possible implementation are further provided with an array substrate,
the power control unit comprises a first output end, a third input end and a fourth input end, the first output end is connected with the second input end of the pressure sensing sensor through the second power supply wiring, the third input end is connected with the voltage input end, and the fourth input end is connected with the high-resistance input end.
The above aspects and any possible implementation manners further provide an array substrate, wherein the electrostatic protection unit has a resistivity smaller than that of the pressure-sensitive sensor.
The above aspect and any possible implementation manner further provide an array substrate, wherein the electrostatic protection unit material includes a metal material.
The above aspects and any possible implementation are further provided with an array substrate,
the cross-sectional area of the first power supply wire is a;
the cross-sectional area of the electrostatic protection unit is b;
wherein a < b.
The above aspects and any possible implementation are further provided with an array substrate,
the power supply control unit comprises a first switch unit and a second switch unit;
the first switch unit comprises a third end, a fourth end and a first control end, the third end is connected with the first output end of the power supply control unit, the fourth end is connected with the third input end of the power supply control unit, and the first control end is connected with an enable signal end;
the second switch unit comprises a fifth end, a sixth end and a second control end, the fifth end is connected with the first output end of the power control unit, the sixth end is connected with the fourth input end of the power control unit, and the second control end is connected with the enable signal end.
The above aspects and any possible implementation manners further provide an array substrate, wherein the electrostatic protection unit is located around the pressure-sensitive sensor.
The above aspect and any possible implementation manner further provide an array substrate, wherein the electrostatic protection unit forms an enclosed area, and the pressure-sensitive sensor is disposed in the enclosed area.
The above aspects and any possible implementation manners further provide an array substrate, wherein a metal conductive layer is disposed between a protection ground terminal of the array substrate and the electrostatic protection unit;
the second end of the electrostatic protection unit is connected to the metal conducting layer through a through hole;
the metal conducting layer is connected with a protective grounding end of the array substrate.
The above aspect and any possible implementation manner further provide an array substrate, wherein the electrostatic protection unit is disposed in the same layer as the pressure-sensitive sensor.
The above aspects and any possible implementation further provide an array substrate, wherein,
the pressure induction sensor is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor also comprises a second output end, a third output end, a first strain pressure resistor, a second strain pressure resistor, a third strain pressure resistor and a fourth strain pressure resistor;
the first strain pressure resistor is connected in series between the first input end and the second output end, the second strain pressure resistor is connected in series between the second input end and the third output end, the third strain pressure resistor is connected in series between the second input end and the second output end, and the fourth strain pressure resistor is connected in series between the first input end and the third output end.
The above-described aspects and any possible implementation further provide an array substrate, wherein the pressure-sensitive sensor is a silicon piezoresistive pressure sensor, and the silicon piezoresistive pressure sensor is a quadrilateral silicon piezoresistive pressure sensor or a cross-shaped silicon piezoresistive pressure sensor.
In a second aspect, an embodiment of the present invention further provides a display panel, where the display panel includes any one of the array substrates described above.
In a third aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel.
In a fourth aspect, an embodiment of the present invention provides a method for controlling an array substrate, where the array substrate includes a display area and a non-display area outside the display area;
the non-display area includes: the device comprises a first power supply wire, at least one pressure sensing sensor, at least one electrostatic protection unit, a second power supply wire and a power supply control unit;
the pressure sensing sensor comprises a first input end and a second input end, and the first input end is connected with a common grounding end of the pressure sensing sensor through a first power supply wire;
the electrostatic protection unit comprises a first end and at least one second end, the first end is connected with the common grounding end, and the second end is connected with the protection grounding end of the array substrate;
the power supply control unit is connected with a second input end through the second power supply wire; the power supply control unit is used for controlling the pressure sensing sensor to be started or controlling the pressure sensing sensor to be in a high-resistance state;
wherein the resistance of the pressure sensing sensor is greater than the resistance of the electrostatic protection unit;
the method comprises the following steps:
in the pressure detection stage, the power supply control unit controls the pressure sensing sensor to be started;
in a non-pressure detection stage, the power supply control unit controls the pressure sensing sensor to be closed and controls a circuit where the pressure sensing sensor is located to be in a high-resistance state.
The above aspects and any possible implementation are further provided with an array substrate,
the power supply control unit comprises a first output end, a third input end and a fourth input end, the first output end is connected with the second input end of the pressure sensing sensor through the second power supply wire, the third input end is connected with the voltage input end, and the fourth input end is connected with the high-resistance input end;
the method comprises the following steps:
in the pressure detection stage, the voltage input end provides bias voltage for the pressure sensing sensor through the power supply control unit so as to control the pressure sensing sensor to be started;
in a non-pressure detection stage, the high-resistance input end provides cut-off voltage for the pressure sensing sensor through the power supply control unit so as to control the pressure sensing sensor to be closed and control a circuit where the pressure sensing sensor is located to be in a high-resistance state.
The above aspects and any possible implementation are further provided with an array substrate,
the power supply control unit comprises a first switch unit and a second switch unit;
the first switch unit comprises a third end, a fourth end and a first control end, the third end is connected with the first output end of the power supply control unit, the fourth end is connected with the third input end of the power supply control unit, and the first control end is connected with an enable signal end;
the second switch unit comprises a fifth end, a sixth end and a second control end, wherein the fifth end is connected with the first output end of the power supply control unit, the sixth end is connected with the fourth input end of the power supply control unit, and the second control end is connected with the enable signal end;
the method comprises the following steps:
in the pressure detection stage, an enable signal controls the first switch unit to be switched on, and the second switch unit is switched off, so that the pressure sensing sensor is switched on;
in a non-pressure detection stage, the enable signal controls the first switch unit to be turned off, and the second switch unit to be turned on, so that the pressure sensing sensor is turned off, and a circuit where the pressure sensing sensor is located is controlled to be in a high-resistance state.
In the technical scheme provided by the embodiment of the invention, the static protection unit with the resistance value smaller than that of the pressure sensing sensor and the power control unit are arranged, the static protection unit is respectively connected with a public grounding end in the pressure sensing sensor and a protection grounding end in the array substrate, the power control unit can control the pressure sensing sensor to be started when pressure detection is required, and a circuit where the pressure sensing sensor is located is controlled to be in a high-resistance state when the pressure detection is not required. When the pressure sensing sensor is not used for pressure detection, static electricity is easily introduced into a common grounding end or other ways of the pressure sensing sensor, the voltage of the introduced static electricity is generally higher, the pressure sensing sensor is easily broken down, and because static electricity tends to select a path with a small resistance value, the pressure-sensitive sensor is in a non-pressure-detecting stage, the power control unit controls the circuit where the pressure sensing sensor is located to be in a high-resistance state, that is, the resistance value of the circuit where the pressure sensing sensor is located is far larger than that of the electrostatic protection unit, static electricity is conducted to the protection grounding end of the array substrate through the electrostatic protection unit, the pressure sensing sensor is ensured not to flow into the pressure sensing sensor as far as possible, and then the pressure sensing sensor is not damaged by the static electricity, therefore, the antistatic capacity of the pressure induction sensor is improved, and the damage of static electricity to the pressure induction sensor is effectively relieved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a top view of an array substrate according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a circular area A in the array substrate provided in FIG. 1;
FIG. 3 is another enlarged schematic view of the circular area A provided by the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power control unit according to an embodiment of the present invention;
fig. 5 is a schematic spatial position diagram of an esd protection unit and a pressure-sensitive sensor according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another spatial location of the esd protection unit and the pressure sensor according to the embodiment of the present invention;
FIG. 7 is a cross-sectional view of a portion of a circular area A of an array substrate according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a pressure-sensitive sensor according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another pressure-sensitive sensor provided by an embodiment of the present invention;
FIG. 10 is a schematic diagram of a pressure-sensitive sensor according to yet another embodiment of the present invention;
FIG. 11 is a schematic diagram of a display panel according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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 terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Fig. 1 and 2 show an array substrate according to an embodiment of the present invention, where fig. 1 is a top view of the array substrate; fig. 2 is an enlarged schematic view of a circular area a in the non-display area of fig. 1. The array substrate 100 includes a display region 1 and a non-display region 2 outside the display region 1; the non-display area 2 includes: a first power trace 21, at least one pressure sensor 22, at least one electrostatic protection unit 23, a second power trace 24 and a power control unit 25; the pressure sensor 22 includes a first input terminal 2201 and a second input terminal 2202, wherein the first input terminal 2201 is connected to the common ground gnd of the pressure sensor 22 through the first power trace 21; the electrostatic protection unit 23 includes a first end 2301 and at least one second end 2302, wherein the first end 2301 is connected to the common ground GND, and the second end 2302 is connected to the protection ground GND of the array substrate 100; the power control unit 25 is connected to the second input terminal 2202 through the second power trace 24; the power control unit 25 is used for controlling the pressure sensor 22 to be turned on or controlling the pressure sensor 22 to be in a high-resistance state; wherein, the resistance of the pressure-sensitive sensor 22 is greater than that of the electrostatic protection unit 23.
It should be noted that, because the array substrate 100 includes various circuit modules that implement different functions, these circuit modules are finally connected to the protection ground GND in the array substrate 100, and because the electrical signals generated by these circuit modules have great differences in terms of energy, frequency, etc., the protection ground GND in the array substrate 100 receives many kinds of electrical signals, and in order to avoid interference between the circuit modules in the array substrate 100 when they are connected to the same ground, a common ground is provided for each circuit module before they are connected to the same ground, so that the corresponding common ground provides a relatively clean common reference value for each circuit module.
When the pressure-sensitive sensors 22 are in normal operation, the common ground gnd outputs the potential to the first input terminal 2201 of the pressure-sensitive sensor 22 through the first power trace 21, and generates a bias voltage with the potential output to the second input terminal 2202 of the pressure-sensitive sensor 22 by the second power trace 24, where the bias voltage controls to turn on the pressure-sensitive sensor 22; when the pressure-sensitive sensor 22 is turned off, the electric potential in the pressure-sensitive sensor 22 is equal everywhere, the array substrate generates accumulation of static charges due to some external factors, and after the static charges are accumulated to a certain amount, because the resistance value of the pressure-sensitive sensor 22 is relatively small, the accumulated static charges are easily transferred to the pressure-sensitive sensor 22 through the first power supply trace 21 via the common ground gnd of the pressure-sensitive sensor 22, and the pressure-sensitive sensor 22 may be damaged or even destroyed by the transferred static charges, so that the data detected by the pressure-sensitive sensor 22 is inaccurate or the pressure detection cannot be performed.
The protection ground GND in the array substrate 100 is mainly used for protecting the array substrate 100. There is an electrical connection (i.e., coupling connection) between the protection ground GND and the ground, so that the protection ground GND in the array substrate 100 can conduct static electricity or other fault current from the array substrate 100.
The electrostatic protection unit 23 is configured to guide static electricity, which may be introduced into the pressure-sensitive sensor 22, out of the array substrate 100 through the protection ground GND. Therefore, the array substrate 100 provided in the embodiment of the present invention electrically connects the electrostatic protection unit 23 between the common ground GND and the protection ground GND, and since the path with a small resistance value is preferentially selected during the static electricity transfer, the set resistance value of the electrostatic protection unit 23 is smaller than the resistance value of the pressure-sensitive sensor 22, when the static electricity in the array substrate 100 is accumulated to a certain degree and the static electricity transfer occurs, the static electricity will be transferred to the electrostatic protection unit 23, and then the static electricity is led out from the array substrate 100 through the protection ground GND, so that the probability that the static electricity is transferred to the pressure-sensitive sensor 22 and damages the pressure-sensitive sensor 22 is reduced, and the antistatic capability of the pressure-sensitive sensor 22 is improved.
Based on the principle that the path with the small resistance value is preferentially selected when static electricity is transferred, the antistatic capability of the pressure sensing sensor 22 is improved to a certain extent, and the antistatic capability can be realized by increasing the resistance value of the pressure sensing sensor 22 or reducing the resistance value of the static protection unit 23. Since the resistance value of the pressure-sensitive sensor 22 itself is relatively small, the selectable resistance value of the electrostatic protection unit 23 is limited; the resistance value of the pressure-sensitive sensor 22 cannot be increased too much in order to ensure the sensitivity and accuracy of the pressure-sensitive sensor 22 during the inspection. Therefore, in order to improve the antistatic capability of the pressure sensor 22 to some extent, the present invention provides that the array substrate 100 is further provided with a power control unit 25. When the pressure-sensitive sensor 22 performs pressure check, the power supply control unit 25 is used for controlling the activation of the pressure-sensitive sensor 22; when the pressure sensor 22 is turned off, the whole branch composed of the common ground gnd, the first power trace 21, the pressure sensor 22 and the second power trace 24 is controlled to have a relatively high resistance, so that the whole branch is in a high-resistance state. When the pressure-sensitive sensor 22 is turned off, the circuit where the whole pressure-sensitive sensor 22 is located is in a high-resistance state, and the total resistance value in the branch is far greater than the total resistance value of the circuit formed by the common ground GND, the electrostatic protection unit 23 and the protection ground GND, so that electrostatic charges are transferred to the electrostatic protection unit and are led out through the protection ground GND without being transferred to the pressure-sensitive sensor 22, and the pressure-sensitive sensor 22 is ensured not to be damaged by electrostatic charges.
It should be added that, based on the different effects generated by the power control unit 25 when the pressure-sensitive sensor 22 is in different stages, the embodiment of the present invention further provides an array substrate control method, including: in the pressure detection phase, the power control unit 25 controls the pressure sensor 22 to be turned on; in the non-pressure detection stage, the power control unit 25 controls the pressure sensor 22 to be turned off, and controls the circuit in which the pressure sensor 22 is located to be in the high impedance state.
In the technical solution provided in the embodiment of the present invention, a power control unit 25 and an electrostatic protection unit 23 having a resistance value smaller than that of the pressure-sensitive sensor 22 are provided, the electrostatic protection unit 23 is respectively connected to a common ground GND in the pressure-sensitive sensor 22 and a protection ground GND in the array substrate 100, and the power control unit 25 can control the pressure-sensitive sensor 22 to be turned on when pressure detection is required, and control a circuit where the pressure-sensitive sensor 22 is located to be in a high impedance state when pressure detection is not required. When the pressure-sensitive sensor 22 is used for non-pressure detection, static electricity is easily introduced into the common ground GND or other paths of the pressure-sensitive sensor 22, the voltage of the introduced static electricity is usually high, and the pressure-sensitive sensor 22 is easily broken down, and because the static electricity usually selects a path with a small resistance value, the power control unit 25 controls the circuit where the pressure-sensitive sensor 22 is located to be in a high-resistance state in the non-pressure detection stage of the pressure-sensitive sensor 22, that is, the resistance value of the circuit where the pressure-sensitive sensor 22 is located is far greater than that of the static protection unit 23, the static electricity is conducted to the protection ground GND of the array substrate 100 through the static protection unit 23, so that the static electricity cannot flow into the pressure-sensitive sensor 22 as far as possible, the pressure-sensitive sensor 22 cannot be damaged by the static electricity, and the antistatic capability of, the damage of static electricity to the pressure-sensitive sensor 22 is effectively relieved.
As shown in fig. 3, fig. 3 is another enlarged schematic view of the circular area a according to the embodiment of the present invention. The power control unit 25 includes a first output end 2501, a third input end 2502 and a fourth input end 2503, the first output end 2501 is connected to the second input end 2202 of the pressure sensor 22 through a second power trace 24, the third input end 2502 is connected to the voltage input end Vin, and the fourth input end 2503 is connected to the high-impedance input end Rin.
Specifically, in the pressure detection stage, the voltage input terminal Vin provides a bias voltage to the pressure-sensitive sensor 22 through the power control unit 25 to control the pressure-sensitive sensor 22 to be turned on; in the non-pressure detection stage, the high-resistance input end Rin provides a cut-off voltage to the pressure sensor 22 through the power control unit 25 to control the pressure sensor 22 to be turned off and control the circuit where the pressure sensor 22 is located to be in a high-resistance state. That is, in the pressure detection stage, the voltage input terminal Vin inputs the bias voltage for the pressure-sensitive sensor 22 to operate to the power control unit 25, then the power control unit 25 outputs the bias voltage to the second power trace 24, and the second power trace 24 inputs the bias voltage to the pressure-sensitive sensor 22, so as to control the pressure-sensitive sensor 22 to be turned on for pressure detection; in the non-pressure detection stage, the power control unit 25 does not output the bias voltage provided by the voltage input terminal Vin to the pressure sensing sensor 22, that is, controls the voltage input terminal Vin to be cut off from the second power trace 24, and controls the pressure sensing sensor 22 to be turned off, but controls the high-resistance input terminal Rin to be turned on from the second power trace 24, and controls a circuit where the pressure sensing sensor 22 is located to have a large equivalent resistance, so that static current flows into the static protection unit 23 with a small value of resistance, thereby implementing static protection of the pressure sensing sensor 22.
Optionally, the resistivity of the electrostatic protection unit 23 is smaller than the resistivity of the pressure-sensitive sensor 22.
The resistance value of the electrostatic protection unit 23 is determined by the resistivity, the cross-sectional area, and the like, the resistivity of the electrostatic protection unit 23 is proportional to the resistance value, and under the condition that other conditions are not changed, the smaller the resistivity of the electrostatic protection unit 23 is, the smaller the resistance value thereof is, the stronger the electrostatic conduction capability is. On the premise that the resistance values are the same, the smaller the resistivity of the electrostatic protection unit 23 is, the smaller the cross-sectional area of the electrostatic protection unit 23 is, and therefore, the smaller the space occupied by the electrostatic protection unit 23 in the non-display region 2 is, which is beneficial to realizing a narrow frame.
Optionally, the material of the electrostatic protection unit 23 includes a metal material.
The magnitude of the resistivity of the electrostatic protection unit 23 is determined by the material of electrostatic protection. The electrostatic protection unit 23 is a conductive material, and the conductive material may be a semiconductor material (e.g., a silicon material, a germanium material, etc.), a metal material (e.g., aluminum, copper, an aluminum alloy, etc.). Since the metal material is a benign conductor, the resistivity of the metal material is less than that of the semiconductor material, and the metal material has a stronger ability to transmit static electricity than the semiconductor material.
Optionally, the cross-sectional area of the first power trace 21 is a; the cross-sectional area of the electrostatic protection unit 23 is b; wherein a < b.
Specifically, the cross-sectional area of the electrostatic protection unit 23 is larger than the cross-sectional area of the power supply trace connected to the pressure sensor 22, and when electrostatic charges in the array substrate 100 are transferred, a conductive path with a larger cross-sectional area is more favorable for the transfer of the electrostatic charges than a conductive path with a smaller cross-sectional area. Therefore, the larger the cross-sectional area of the electrostatic protection unit 23 is than the cross-sectional area of the first power trace 21, the higher the probability of electrostatic transmission into the electrostatic protection unit 23 and the lower the probability of electrostatic transmission into the pressure sensitive sensor 22.
Note that, the pressure-sensitive sensors 22, the electrostatic protection unit 23, and the like are all disposed in the non-display region 2 of the array substrate 100, and the line width of the electrostatic protection unit 23 in the first direction (the first direction is a direction in which the pressure-sensitive sensors 22 extend toward the frame of the array substrate 100) is smaller than the distance c from the pressure-sensitive sensors 22 to the frame of the array substrate 100 in order not to affect the wiring of other circuit modules, in consideration of the limited wiring space of the non-display region 2.
As shown in fig. 4, fig. 4 is a schematic structural diagram of the power control unit 25. The power supply control unit 25 includes a first switch unit K1 and a second switch unit K2; the first switch unit K1 includes a third end 2603, a fourth end 2602 and a first control end 2601, the third end 2603 is connected to the first output end 2501 of the power control unit 25, the fourth end 2602 is connected to the third input end 2502 of the power control unit 25, and the first control end 2601 is connected to an enable signal end; the second switch unit K2 includes a fifth terminal, a sixth terminal and a second control terminal 2604, the fifth terminal 2606 is connected to the first output terminal 2501 of the power control unit 25, the sixth terminal 2605 is connected to the fourth input terminal 2503 of the power control unit 25, and the second control terminal 2604 is connected to an enable signal terminal.
Specifically, in the pressure detection stage, the enable signal controls the first switch unit K1 to be turned on, and the second switch unit K2 to be turned off, so that the pressure sensor 22 is turned on; in the non-pressure detection stage, the enable signal controls the first switch unit K1 to be turned off, and the second switch unit K2 to be turned on, so that the pressure sensor 22 is turned off, and the circuit in which the pressure sensor 22 is located is controlled to be in a high impedance state.
In the pressure detection stage, the first switch unit K1 is controlled to be turned on, and the second switch unit K2 is controlled to be turned off, so that the voltage input end Vin is connected to the second power trace 24, the voltage input end Vin inputs a bias voltage to the second power trace 24, and then the second power trace 24 inputs the bias voltage to the pressure-sensitive sensor 22, so that the pressure-sensitive sensor 22 is controlled to be turned on to perform pressure detection; in the non-pressure detection stage, the first switch unit K1 is controlled to be turned off, the power control unit 25 is controlled not to output the bias voltage provided by the input terminal Vin to the pressure sensing sensor 22, that is, the voltage input terminal Vin and the second power trace 24 are controlled to be cut off, the second switch unit K2 is controlled to be turned on, so that the pressure sensing sensor 22 is controlled to be turned off, but the high-resistance input terminal Rin and the second power trace 24 are controlled to be turned on, and a circuit where the pressure sensing sensor 22 is located is controlled to have a large equivalent resistance, so that static electricity flows into the static electricity protection unit 23 with a small resistance value, and static electricity protection of the pressure sensing sensor 22 is realized.
Optionally, the electrostatic protection unit 23 is located around the pressure-sensitive sensor 22.
Specifically, the electrostatic protection unit 23 may be disposed only on the side of the first input end 2201 of the pressure-sensitive sensor 22 away from the pressure-sensitive sensor 22; as shown in fig. 5, fig. 5 is a schematic spatial position diagram of the electrostatic protection unit 23 and the pressure-sensitive sensor 22, and the electrostatic protection unit 23 may be disposed on the side of each input end and each output end of the pressure-sensitive sensor 22 away from the pressure-sensitive sensor 22.
The electrostatic protection unit 23 is arranged around the pressure-sensitive sensor 22, so that the distance between the pressure-sensitive sensor 22 and the electrostatic protection unit 23 is relatively short, and static electricity pre-transmitted to the pressure-sensitive sensor 22 can be led out relatively timely; and set up electrostatic protection unit 23 around pressure-sensitive sensor 22, can separate pressure-sensitive sensor 22 from other signal routing of non-display area 2 to can reduce the noise interference that other signal routing produced pressure-sensitive sensor 22, and then improve the degree of accuracy of the output signal of pressure-sensitive sensor 22 to a certain extent.
Alternatively, as shown in fig. 6, the electrostatic protection unit 23 constitutes a closed area, and the pressure-sensitive sensor 22 is disposed in the closed area.
The electrostatic protection unit 23 is disposed to surround the pressure sensor 22, and a shielding layer is formed around the pressure sensor 22 to isolate the pressure sensor 22 from other traces in the non-display area 2, so that interference of noise to the pressure sensor 22 can be reduced more effectively; and the electrostatic protection unit 23 can further guide away the static electricity which may be transmitted to the pressure-sensitive sensor 22 around the pressure-sensitive sensor 22 in time.
It should be noted that the electrostatic protection unit 23 shown in fig. 6 is only a schematic diagram provided by the embodiment of the present invention, and the shape of the electrostatic protection unit 23 in the present invention is not limited specifically, such as a circle, an ellipse, a quadrangle, and the like.
Optionally, a metal conductive layer is disposed between the protection ground GND of the array substrate 100 and the electrostatic protection unit 23; the second end 2302 of the esd protection unit 23 is connected to the metal conductive layer through a via hole; the metal conductive layer is connected to the protection ground GND of the array substrate 100.
Referring to fig. 7, fig. 7 is a cross-sectional view of a portion of a circular area a of an array substrate according to an embodiment of the invention. In order to prevent the electrostatic protection unit 23 from contacting the metal conductive layer 01 and causing a short circuit, an insulating layer 02 is disposed between the electrostatic protection unit and the metal conductive layer 01 of the array substrate 100, and the electrostatic protection unit 23 is connected to the metal conductive layer 01 through a via hole.
In order to ensure that the protection ground GND of the array substrate 100 can be better electrically coupled with the ground, the protection ground GND of the array substrate 100 is generally disposed in the housing of the array substrate 100, and in order to timely conduct away the static electricity pre-transmitted to the pressure sensor 22, the distance between the electrostatic protection unit 23 and the pressure sensor 22 is relatively short, and therefore, the electrostatic protection unit 23 and the protection ground GND are different in layer. Since the orthographic projection of the electrostatic protection unit on the film layer where the protection ground GND is located may not overlap with the area where the protection ground GND is located, in order to ensure that the static electricity in the array substrate 100 can be conducted to the protection ground GND through the electrostatic protection unit 23 under this condition, the second end 2302 of the electrostatic protection unit 23 is first connected to the metal conductive layer 01 through the via hole, and then the metal conductive layer is connected to the protection ground GND of the array substrate 100. In the static electricity leading-out process, the static electricity protection unit 23 transmits the static electricity to the metal conductive layer, and then the static electricity can be quickly led out through the protection ground GND by using the metal conductive layer.
Optionally, the electrostatic protection unit 23 is disposed in the same layer as the pressure-sensitive sensor 22.
The electrostatic protection unit 23 and the pressure sensor 22 are arranged on the same layer, the distance between the electrostatic protection unit 23 and the pressure sensor 22 can be shortened, the closer the electrostatic protection unit 23 and the pressure sensor 22 are, the larger the electrostatic protection effect of the electrostatic protection unit 23 on the pressure sensor 22 is, compared with the situation that the electrostatic protection unit 23 and the pressure sensor are arranged on different layers, the same layer is arranged, the better static electricity which is far away from one side of the electrostatic protection unit 23 and the static electricity around the pressure sensor 22 can be guided away in time by the pressure sensor 22, and therefore the antistatic capacity of the pressure sensor 22 can be further improved.
In addition, the common ground gnd of the pressure-sensitive sensor 22 is usually provided in the same layer as the pressure-sensitive sensor 22 itself. The electrostatic protection unit 23 and the pressure-sensitive sensor 22 are disposed on the same layer, and when the electrostatic protection unit 23 is connected to the common ground gnd of the pressure-sensitive sensor 22, the electrostatic protection unit 23 can be directly connected to the common ground gnd without punching holes in the electrostatic protection unit 23, and the electrostatic protection unit is connected to the common ground gnd through via holes, so that the process flow of the array substrate 100 during manufacturing is reduced.
It should be added that, usually, the second power trace 24 connected to the second input end 2202 of the pressure sensor 22 and the output signal trace connected to the output end of the pressure sensor 22 are disposed on different layers from the pressure sensor 22, so that when the electrostatic protection unit 23 is disposed on the same layer as the pressure sensor 22, the electrostatic protection unit 23 does not generate a short circuit problem due to cross contact with the second power trace 24 and the output signal trace.
As shown in fig. 8, fig. 8 is a schematic structural diagram of a pressure-sensitive sensor 22 according to an embodiment of the present invention. The pressure-sensitive sensor 22 is a wheatstone bridge type pressure sensor, and the wheatstone bridge type pressure sensor further includes a second output terminal 2203, a third output terminal 2204, a first strain pressure resistor R1, a second strain pressure resistor R2, a third strain pressure resistor R3 and a fourth strain pressure resistor R4; the first strain pressure resistor R1 is connected in series between the first input terminal 2201 and the second output terminal 2203, the second strain pressure resistor R2 is connected in series between the second input terminal 2202 and the third output terminal 2204, the third strain pressure resistor R3 is connected in series between the second input terminal 2202 and the second output terminal 2203, and the fourth strain pressure resistor R4 is connected in series between the first input terminal 2201 and the third output terminal 2204.
When a bias voltage signal is input to the first input end 2201 and the second input end 2202, current passes through each branch in the wheatstone bridge, and when a finger presses the display panel, the first strain pressure resistor R1, the second strain pressure resistor R2, the third strain pressure resistor R3 and the fourth strain pressure resistor R4 deform, so that the voltage output value of the wheatstone bridge changes, and the pressure sensing signals output by the second output end 2203 and the third output end 2204 of the pressure sensing sensor 22 are different from the pressure sensing signals output by the second output end 2203 and the third output end 2204 of the pressure sensing sensor 22 when no finger presses, and the voltage output value of the wheatstone bridge is detected through the second output end 2203 and the third output end 2204, and the pressure value is calculated through the voltage output value of the wheatstone bridge.
Exemplarily, referring to fig. 9, fig. 9 is a schematic structural diagram of another pressure-sensitive sensor provided in an embodiment of the present invention. The first strain pressure resistor R1, the second strain pressure resistor R2, the third strain pressure resistor R3 and the fourth strain pressure resistor R4 may all be formed by a serpentine trace, specifically, taking the first strain pressure resistor R1 as an example, the serpentine trace of the first strain pressure resistor R1 includes a long side extending along the first extending direction and a short side extending along the second extending direction, so the first strain pressure resistor R1 may deform well in the first extending direction, and similarly, the second strain pressure resistor R2 may also deform well in the first extending direction, while the second strain pressure resistor R3 and the fourth strain pressure resistor R4 may deform well in the second extending direction, and the resistance values of the first strain pressure resistor R1, the second strain pressure resistor R2, the third strain pressure resistor R3 and the fourth strain pressure resistor R4 change correspondingly according to their deformation amounts, therefore, the magnitude of the pressure value of the pressed point can be calculated by the difference between the deformation amounts of the pressure sensitive sensor 22 in the first extending direction and the second extending direction and converted into the voltage change amount. By adopting the snake-shaped routing structure, on one hand, the first strain pressure resistor R1, the second strain pressure resistor R2, the third strain pressure resistor R3 and the fourth strain pressure resistor R4 can be ensured to have larger reference resistance values, and simultaneously, the size of the resistor is reduced, so that the resistor can be distributed in a smaller area, and the influence of temperature difference is eliminated; on the other hand, the contact area between the resistor and the substrate in contact with the resistor can be increased, so that the resistor can more accurately sense the strain of the substrate, and the pressure sensing precision is improved. The substrate in contact with the resistor can be an array substrate, a color film substrate or a cover plate.
Referring to fig. 10, fig. 10 is a schematic diagram of another pressure-sensitive sensor 22 according to an embodiment of the present invention. The pressure-sensitive sensor 22 is a silicon piezoresistive pressure sensor, which is a quadrilateral silicon piezoresistive pressure sensor or a cross silicon piezoresistive pressure sensor.
Specifically, the silicon piezoresistive pressure sensor may have a quadrilateral structure, four sides of the silicon piezoresistive pressure sensor are respectively connected to the first input end 2201, the second input end 2202, the second output end 2203 and the third output end 2204, the first input end 2201 and the second input end 2202 are respectively connected to two opposite sides, and the second output end 2203 and the third output end 2204 are respectively connected to the other two opposite sides. The first input end 2201 and the second input end 2202 apply bias voltage to the silicon piezoresistive pressure sensor, when the display panel is pressed to deform, the resistance value of the silicon piezoresistive pressure sensor changes, output signals of the second output end 2203 and the third output end 2204 correspondingly change, and the pressure applied to the silicon piezoresistive pressure sensor is detected through the voltage changes of the second output end 2203 and the third output end 2204.
Illustratively, the pressure sensitive sensor 22 may be square in shape. This arrangement has the advantage that the potential between the second output terminal 2203 and the third output terminal 2204 is equal under the condition of no pressing, and the pressure sensing signals output by the second output terminal and the third output terminal 2204 are 0, which is beneficial to simplifying the calculation process of the pressure value and improving the sensitivity of pressure detection.
The embodiment of the invention further provides a display panel 200, and the display panel 200 includes any one of the array substrates 100 described above.
Specifically, taking a liquid crystal display panel as an example, as shown in fig. 11, fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present invention. The display panel 200 includes the array substrate 100, a color filter substrate 300 disposed opposite to the array substrate 100, and a liquid crystal layer 400 disposed between the array substrate 100 and the color filter substrate 300. When the display panel displays, an electric field is formed between the pixel electrode and the common electrode on the array substrate 100 to control the rotation of the liquid crystal molecules in the liquid crystal layer 400, so as to achieve the display function.
It should be noted that the display panel shown in fig. 11 is a schematic view provided by taking a liquid crystal display panel as an example, and the array substrate in the embodiment of the present invention may also be applied to an organic light emitting display panel (OLED), and the like, that is, the display panel 200 in the embodiment of the present invention may also be an organic light emitting display panel (OLED). The present invention is not particularly limited with respect to the type of the display panel 200.
It should be noted that, since the display panel includes any one of the array substrates 100 provided in the embodiments of the present invention, the display panel 200 also has the beneficial effects of the array substrate 100, and the principle and specific implementation of the display panel 200 that produce the corresponding beneficial effects can refer to the basic embodiments of the array, which is not repeated herein.
An embodiment of the present invention further provides a display device, a structure of which is shown in fig. 12, and the display device includes the display panel 200.
The specific structure and principle of the display panel 200 are the same as those of the above embodiments, and are not described herein again. The display device may be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, an electronic paper book, or a television.
In the technical solution provided in the embodiment of the present invention, a power control unit 25 and an electrostatic protection unit 23 having a resistance value smaller than that of the pressure-sensitive sensor 22 are provided, the electrostatic protection unit 23 is respectively connected to a common ground GND in the pressure-sensitive sensor 22 and a protection ground GND in the array substrate 100, and the power control unit 25 can control the pressure-sensitive sensor 22 to be turned on when pressure detection is required, and control a circuit where the pressure-sensitive sensor 22 is located to be in a high impedance state when pressure detection is not required. When the pressure-sensitive sensor 22 is used for non-pressure detection, static electricity is easily introduced into the common ground GND or other paths of the pressure-sensitive sensor 22, the voltage of the introduced static electricity is usually high, and the pressure-sensitive sensor 22 is easily broken down, and because the static electricity usually selects a path with a small resistance value, the power control unit 25 controls the circuit where the pressure-sensitive sensor 22 is located to be in a high-resistance state in the non-pressure detection stage of the pressure-sensitive sensor 22, that is, the resistance value of the circuit where the pressure-sensitive sensor 22 is located is far greater than that of the static protection unit 23, the static electricity is conducted to the protection ground GND of the array substrate 100 through the static protection unit 23, so that the static electricity cannot flow into the pressure-sensitive sensor 22 as far as possible, the pressure-sensitive sensor 22 cannot be damaged by the static electricity, and the antistatic capability of, the damage of static electricity to the pressure-sensitive sensor 22 is effectively relieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. The array substrate is characterized by comprising a display area and a non-display area outside the display area;
the non-display area includes:
the device comprises a first power supply wire, at least one pressure sensing sensor, at least one electrostatic protection unit, a second power supply wire and a power supply control unit;
the pressure sensing sensor comprises a first input end and a second input end, and the first input end is connected with a common grounding end of the pressure sensing sensor through the first power supply wire;
the electrostatic protection unit comprises a first end and at least one second end, the first end is connected with the common grounding end, and the second end is connected with the protection grounding end of the array substrate;
the power supply control unit is connected with the second input end through the second power supply wire; the power supply control unit is used for controlling the pressure sensing sensor to be started or controlling the pressure sensing sensor to be in a high-resistance state;
wherein the resistance of the pressure sensing sensor is greater than the resistance of the electrostatic protection unit;
in the pressure detection stage, the power supply control unit controls the pressure sensing sensor to be started;
in a non-pressure detection stage, the power supply control unit controls the pressure sensing sensor to be closed and controls a circuit where the pressure sensing sensor is located to be in a high-resistance state.
2. The array substrate of claim 1,
the power control unit comprises a first output end, a third input end and a fourth input end, the first output end is connected with the second input end of the pressure sensing sensor through the second power supply wiring, the third input end is connected with the voltage input end, and the fourth input end is connected with the high-resistance input end.
3. The array substrate of claim 1, wherein the electrostatic protection unit has a resistivity less than that of the pressure-sensitive sensor.
4. The array substrate of claim 1, wherein the electrostatic protection cell material comprises a metal material.
5. The array substrate of claim 1,
the cross-sectional area of the first power supply wire is a;
the cross-sectional area of the electrostatic protection unit is b;
wherein a is less than b.
6. The array substrate of claim 2,
the power supply control unit comprises a first switch unit and a second switch unit;
the first switch unit comprises a third end, a fourth end and a first control end, the third end is connected with the first output end of the power supply control unit, the fourth end is connected with the third input end of the power supply control unit, and the first control end is connected with an enable signal end;
the second switch unit comprises a fifth end, a sixth end and a second control end, the fifth end is connected with the first output end of the power control unit, the sixth end is connected with the fourth input end of the power control unit, and the second control end is connected with the enable signal end.
7. The array substrate of claim 1,
the electrostatic protection unit is located around the pressure-sensitive sensor.
8. The array substrate of claim 7,
the static protection unit forms a closed area, and the pressure induction sensor is arranged in the closed area.
9. The array substrate of claim 1, wherein a metal conductive layer is disposed between a protection ground of the array substrate and the electrostatic protection unit;
the second end of the electrostatic protection unit is connected to the metal conducting layer through a through hole;
the metal conducting layer is connected with a protective grounding end of the array substrate.
10. The array substrate of claim 9, wherein the electrostatic protection unit is disposed in the same layer as the pressure sensor.
11. The array substrate of any one of claims 1 to 10,
the pressure induction sensor is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor also comprises a second output end, a third output end, a first strain pressure resistor, a second strain pressure resistor, a third strain pressure resistor and a fourth strain pressure resistor;
the first strain pressure resistor is connected in series between the first input end and the second output end, the second strain pressure resistor is connected in series between the second input end and the third output end, the third strain pressure resistor is connected in series between the second input end and the second output end, and the fourth strain pressure resistor is connected in series between the first input end and the third output end.
12. The array substrate of any one of claims 1 to 10, wherein the pressure sensitive sensors are silicon piezoresistive pressure sensors, and the silicon piezoresistive pressure sensors are quadrilateral silicon piezoresistive pressure sensors or cross silicon piezoresistive pressure sensors.
13. A display panel comprising the array substrate according to any one of claims 1 to 12.
14. A display device characterized by comprising the display panel according to claim 13.
15. The array substrate control method is characterized in that the array substrate comprises a display area and a non-display area outside the display area;
the non-display area includes: the device comprises a first power supply wire, at least one pressure sensing sensor, at least one electrostatic protection unit, a second power supply wire and a power supply control unit;
the pressure sensing sensor comprises a first input end and a second input end, and the first input end is connected with a common grounding end of the pressure sensing sensor through a first power supply wire;
the electrostatic protection unit comprises a first end and at least one second end, the first end is connected with the common grounding end, and the second end is connected with the protection grounding end of the array substrate;
the power supply control unit is connected with a second input end through the second power supply wire; the power supply control unit is used for controlling the pressure sensing sensor to be started or controlling a circuit where the pressure sensing sensor is located to be in a high-resistance state;
wherein the resistance of the pressure sensing sensor is greater than the resistance of the electrostatic protection unit;
the method comprises the following steps:
in the pressure detection stage, the power supply control unit controls the pressure sensing sensor to be started;
in a non-pressure detection stage, the power supply control unit controls the pressure sensing sensor to be closed and controls a circuit where the pressure sensing sensor is located to be in a high-resistance state.
16. The array substrate control method of claim 15,
the power supply control unit comprises a first output end, a third input end and a fourth input end, the first output end is connected with the second input end of the pressure sensing sensor through the second power supply wire, the third input end is connected with the voltage input end, and the fourth input end is connected with the high-resistance input end;
the method comprises the following steps:
in the pressure detection stage, the voltage input end provides bias voltage for the pressure sensing sensor through the power supply control unit so as to control the pressure sensing sensor to be started;
in a non-pressure detection stage, the high-resistance input end provides cut-off voltage for the pressure sensing sensor through the power supply control unit so as to control the pressure sensing sensor to be closed and control a circuit where the pressure sensing sensor is located to be in a high-resistance state.
17. The array substrate control method of claim 16,
the power supply control unit comprises a first switch unit and a second switch unit;
the first switch unit comprises a third end, a fourth end and a first control end, the third end is connected with the first output end of the power supply control unit, the fourth end is connected with the third input end of the power supply control unit, and the first control end is connected with an enable signal end;
the second switch unit comprises a fifth end, a sixth end and a second control end, wherein the fifth end is connected with the first output end of the power supply control unit, the sixth end is connected with the fourth input end of the power supply control unit, and the second control end is connected with the enable signal end;
the method comprises the following steps:
in the pressure detection stage, an enable signal controls the first switch unit to be switched on, and the second switch unit is switched off, so that the pressure sensing sensor is switched on;
in a non-pressure detection stage, the enable signal controls the first switch unit to be turned off, and the second switch unit to be turned on, so that the pressure sensing sensor is turned off, and a circuit where the pressure sensing sensor is located is controlled to be in a high-resistance state.
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