CN108231026B - Array substrate, touch display panel and touch display device - Google Patents
Array substrate, touch display panel and touch display device Download PDFInfo
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- CN108231026B CN108231026B CN201810025889.7A CN201810025889A CN108231026B CN 108231026 B CN108231026 B CN 108231026B CN 201810025889 A CN201810025889 A CN 201810025889A CN 108231026 B CN108231026 B CN 108231026B
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- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 description 17
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- 230000005281 excited state Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
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- 230000005525 hole transport Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses an array substrate, a touch display panel and a touch display device, wherein the array substrate comprises a display area, a non-display area surrounding the display area, at least one pressure sensor and a scanning driving circuit positioned in the non-display area; each pressure sensor comprises at least one signal input and at least one signal output; the scanning driving circuit comprises a plurality of cascaded shift registers, and the plurality of shift registers comprise a plurality of display shift registers and at least one pressure-sensitive shift register; the output end of the display shift register is used for outputting display signals to the display area, and the output end of the pressure sensing shift register is connected to the signal input end of the pressure sensor. The invention can reduce the problem of input signal attenuation of the signal input end of the pressure sensor and improve the uniformity of the pressure sensing signal.
Description
Technical Field
The present invention relates to the field of touch display, and in particular, to an array substrate, a touch display panel including the array substrate, and a touch display device including the touch display panel.
Background
At present, display panels integrated with touch control functions are widely applied to electronic devices such as mobile phones and tablet computers. Therefore, the user can operate the electronic equipment by touching the mark on the electronic equipment with fingers, dependence of the user on other input equipment (such as a keyboard, a mouse and the like) is eliminated, and man-machine interaction is simpler.
In order to better meet the user requirement, a pressure sensor for detecting the magnitude of touch pressure when a user touches the display panel may also be generally disposed in the display panel, so as to enrich the application range of the touch technology.
However, in the current pressure sensing display panel, because the positions of different pressure sensors on the panel are different, the lengths of signal input traces are also different, which may cause the input signals of the pressure sensors to be different, and affect the pressure sensing effect.
Disclosure of Invention
In view of the foregoing, the present invention provides an array substrate, a touch display panel including the array substrate, and a touch display device including the touch display panel, so as to improve a pressure sensing effect.
In a first aspect, an embodiment of the present invention provides an array substrate, including a display area and a non-display area surrounding the display area, and further including at least one pressure sensor and a scan driving circuit located in the non-display area; each of said pressure sensors comprising at least one signal input and at least one signal output; the scanning driving circuit comprises a plurality of cascaded shift registers, and the plurality of shift registers comprise a plurality of display shift registers and at least one pressure-sensitive shift register; the output end of the display shift register is used for outputting display signals to the display area, and the output end of the pressure sensing shift register is connected to the signal input end of the pressure sensor.
In a second aspect, an embodiment of the invention provides a touch display panel, including the array substrate according to the first aspect.
In a third aspect, an embodiment of the present invention further provides a touch display device, including the touch display panel according to the second aspect.
Compared with the prior art, the array substrate, the touch display panel and the touch display device provided by the invention have the advantages that the pressure sensing shift register which is different from the display shift register for outputting the display signal to the display area is additionally arranged, the signal output by the pressure sensing shift register is used as the input signal of the pressure sensor, the pressure sensor is driven to work, the problem of attenuation of the input signal of the signal input ends of different pressure sensors is greatly reduced, the uniformity of the pressure sensing signal is improved, and the pressure sensing effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 schematic top view of a conventional touch display panel;
fig. 2 is a schematic top view of an array substrate according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection between the scan driving circuit and the pressure sensor in FIG. 2;
fig. 4 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of one configuration of the pressure sensor of FIG. 5;
FIG. 7 is a schematic view of another configuration of the pressure sensor of FIG. 5;
FIG. 8 is a schematic diagram of one embodiment of the pressure sensor of FIG. 7;
fig. 9 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the invention;
fig. 10 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention;
fig. 12 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a shift register of FIG. 12;
FIG. 14 is a timing signal diagram of a portion of the ports of the scan driver circuit of FIG. 12;
fig. 15 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a touch display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the touch display panel is a schematic top view of a conventional touch display panel, and includes a display area AA ' and a non-display area NA ', in which a plurality of pressure sensors 10 ' are disposed. The ground terminal of each pressure sensor 10 'is connected to one ground signal line 101', and the power terminal of each pressure sensor 10 'is connected to one power signal line 102'. However, when the power signal line 102 ' transmits the power signal to each pressure sensor 10 ', the power signal is attenuated inevitably, so that the intensity of the power signal is gradually reduced, which makes the intensity of the power signal received by the pressure sensor 10 ' arranged above weaker.
To overcome the above problem, the attenuation of the power signal is generally reduced by increasing the width of the power signal line 5' in the prior art. However, the power signal line 5' cannot be made wide due to the limitation of the frame width, and thus the improvement effect of this manner is not significant.
In view of the above, an embodiment of the present invention provides an array substrate, including a display area and a non-display area surrounding the display area, and further including at least one pressure sensor and a scan driving circuit located in the non-display area; each pressure sensor comprises at least one signal input and at least one signal output; the scanning driving circuit comprises a plurality of cascaded shift registers, and the plurality of shift registers comprise a plurality of display shift registers and at least one pressure-sensitive shift register; the output end of the display shift register is used for outputting display signals to the display area, and the output end of the pressure sensing shift register is connected to the signal input end of the pressure sensor.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic top view of an array substrate according to an embodiment of the present invention, and fig. 3 is a schematic connection relationship between a scan driving circuit and a pressure sensor in fig. 2. The array substrate comprises a display area AA, a non-display area NA surrounding the display area AA, at least one pressure sensor 10 (only one pressure sensor 10 is shown in the figure) and a scanning driving circuit 20 positioned in the non-display area NA; each pressure sensor 10 comprises at least one signal input 11 (only one signal input 11 is shown in the figure) and at least one signal output 12 (only one signal output 12 is shown in the figure); the scan driving circuit 20 includes a plurality of cascaded shift registers 210, and the plurality of shift registers 210 includes a plurality of display shift registers 210a and at least one pressure-sensitive shift register 210b (only one pressure-sensitive shift register 210b is shown in the figure); the output terminal of the display shift register 210a is used for outputting a display signal to the display area AA, and the output terminal of the pressure-sensitive shift register 210b is connected to the signal input terminal 11 of the pressure sensor 10.
Compared with the touch display panel shown in fig. 2, the array substrate provided in the embodiment of the invention is additionally provided with a pressure sensing shift register 210b different from the display shift register 210a for outputting display signals to the display area AA, and the pressure sensor 10 is driven to operate by using a signal output by the pressure sensing shift register 210b as an input signal of the pressure sensor 10. The setting position of the pressure sensor 10 can be adjusted according to the position of the pressure sensing shift register 210b which is correspondingly connected, the length of a signal line connecting the pressure sensor 10 and the pressure sensing shift register 210b is more controllable, and the signal line can be independently set without sharing the signal line by a plurality of pressure sensors 10, the problem of attenuation of input signals of signal input ends 11 of different pressure sensors 10 is greatly reduced, the uniformity of pressure sensing signals is improved, and the pressure sensing effect is improved.
With reference to fig. 2 and fig. 3, the array substrate further includes a plurality of scan lines G and a plurality of data lines D in the display area AA, and the plurality of scan lines G and the plurality of data lines D are insulated and crossed to define a plurality of sub-pixels P. Alternatively, in the embodiment of the present invention, the output end (e.g., Gate1, Gate N to Gate N +5 in fig. 3) of each display shift register 210b is connected to one scan line G. That is to say, the display signal provided by the display shift register 210b in the scan driving circuit 20 to the display area AA is a scan signal.
In the embodiments shown in fig. 2 and 3, the output terminal of one pressure-sensitive shift register is connected to the signal input terminal of only one pressure sensor, and in other alternative embodiments of the present invention, the output terminal of the same pressure-sensitive shift register may be connected to the signal input terminals of at least two pressure sensors. Referring to fig. 4, a schematic diagram of a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the invention is shown. The same points as those in the embodiment shown in fig. 3 are not repeated herein, but the difference is that in this embodiment, the output end of the same pressure-sensitive shift register 210b is connected to the signal input ends 11 of the two pressure sensors 10, so that the number of the pressure-sensitive shift registers 210b can be reduced, and the space occupied by the scan driving circuit 20 is saved, thereby reducing the space of the non-display area NA, and meeting the development trend of narrow frames.
In the embodiments shown in fig. 2-4, each of the pressure sensors includes a signal input and a signal output. In other alternative embodiments of the present invention, each pressure sensor may include two signal inputs and two signal outputs, the two signal inputs being a first signal input and a second signal input, respectively, and the two signal outputs being a first signal output and a second signal output, respectively. Referring to fig. 5, a schematic diagram of a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the invention is shown. The same points as those in the embodiment shown in fig. 3 are not repeated herein, except that in this embodiment, each pressure sensor 10 may include two signal input terminals 11 and two signal output terminals 12, where the two signal input terminals 11 are a first signal input terminal Vin1 and a second signal input terminal Vin2, respectively, and the two signal output terminals 12 are a first signal output terminal Vout1 and a second signal output terminal Vout2, respectively; the first and second signal input terminals Vin1 and Vin2 are used for inputting a bias voltage signal to the pressure sensor 10, and the first and second signal output terminals Vout1 and Vout2 are used for outputting a pressure sensing signal from the pressure sensor 10.
Specifically, in an alternative embodiment, as shown in fig. 6, a schematic diagram of a structure of the pressure sensor in fig. 5 is shown, the pressure sensor has a monolithic quadrilateral structure, is made of a semiconductor material, and includes a first side 10a and a second side 10c which are oppositely arranged, and a third side 10b and a fourth side 10d which are oppositely arranged; the first signal input terminal Vin1 is located on the first side 10a, the second signal input terminal Vin2 is located on the second side 10c, the first signal output terminal Vout1 is located on the third side 10b, and the second signal output terminal Vout2 is located on the fourth side 10 d. When the array substrate is pressed, the pressure sensor 10 is subjected to a shearing force from a position corresponding to the pressure sensor 10 on the array substrate, so that the pressure detection signals output by the first signal output terminal Vout1 and the second signal output terminal Vout2 of the pressure sensor 10 are different from the pressure detection signals output by the first signal output terminal Vout1 and the second signal output terminal Vout2 of the pressure sensor 12 when no pressure is applied, and therefore, the magnitude of the touch pressure can be determined.
In another alternative embodiment, as shown in fig. 7, another structural diagram of the pressure sensor in fig. 5 is shown, the pressure sensor is a wheatstone bridge type pressure sensor, and the pressure sensor includes a first sensing resistor R1, a second sensing resistor R2, a third sensing resistor R3 and a fourth sensing resistor R4; a first end a of the first sensing resistor R1 and a first end a 'of the fourth sensing resistor R4 are electrically connected to the first signal output terminal Vout1, a second end b of the first sensing resistor R1 and a first end b' of the second sensing resistor R2 are electrically connected to the second signal input terminal Vin2, a second end d of the fourth sensing resistor R4 and a first end d 'of the third sensing resistor R3 are electrically connected to the first signal input terminal Vin1, and a second end c of the second sensing resistor R2 and a second end c' of the third sensing resistor R3 are electrically connected to the second signal output terminal Vout 2; the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 form a wheatstone bridge configuration. When a bias voltage signal is input to the first signal input terminal Vin1 and the second signal input terminal Vin2, current flows through each branch of the wheatstone bridge. At this time, when the array substrate is pressed, the resistance of each resistor (including the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4) inside the pressure sensor changes due to the shearing force from the corresponding position on the array substrate, so that the pressure detection signals output by the first signal output terminal Vout1 and the second signal output terminal Vout2 of the pressure sensor are different from the pressure detection signals output by the first signal output terminal Vout1 and the second signal output terminal Vout2 of the pressure sensor 13 when no pressure is applied, and accordingly, the magnitude of the touch pressure can be determined.
Since the wheatstone bridge is disposed on the touch display panel, when pressure is applied to the touch display panel, the touch display panel deforms, and the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3, and the fourth sensing resistor R4 disposed on the touch display panel all deform, so that the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3, and the fourth sensing resistor R4 need to sense different deformations in order to detect the magnitude of the touch pressure.
Alternatively, referring to fig. 8, fig. 8 is a schematic view showing a specific structure of the pressure sensor shown in fig. 7, the pressure sensor may further include a first extending direction x and a second extending direction y, the first extending direction x and the second extending direction y are arranged to intersect, a component of an extending length of the first sensing resistor R1 from the first end a to the second end b in the first extending direction x is greater than a component in the second extending direction y, a component of an extending length of the second sensing resistor R2 from the first end b 'to the second end c in the second extending direction y is greater than a component in the first extending direction x, a component of an extending length of the third sensing resistor R3 from the first end d' to the second end c 'in the first extending direction x is greater than a component in the second extending direction y, and a component of an extending length of the fourth sensing resistor R4 from the first end a' to the second end d in the second extending direction y is greater than a component in the first extending direction x. The arrangement is such that the first and third sensing resistors R1 and R3 sense strain in the first extension direction x, and the second and fourth sensing resistors R2 and R4 sense strain in the second extension direction y. Because the direction of the first sensing resistor R1 sensing strain is different from the direction of the second sensing resistor R2 sensing strain, and the direction of the fourth sensing resistor R4 sensing strain is different from the direction of the third sensing resistor R3 sensing strain, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 can be distributed at the same position in space or at positions with similar distances, so that the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 have synchronous temperature changes, the influence of temperature difference is eliminated, and the pressure sensing precision is improved.
With continued reference to fig. 5, the first signal input terminal Vin1 and the second signal input terminal Vin2 of the same pressure sensor 12 are connected to the output terminals of different pressure sensing shift registers (e.g., Sen1 and Sen2 in fig. 5). Since the shift registers are scanned stage by stage, taking the example that the effective output signal of the shift register is a high level signal, when the first signal input terminal Vin1 of one pressure sensor 12 receives the output signal from the corresponding pressure sensing shift register as a high level signal and the output signals of the other shift registers are low level signals, the second signal input terminal Vin2 of the pressure sensor 12 receives the output signal from the corresponding pressure sensing shift register as a low level signal, so that the bias voltage signal is input to the pressure sensor 10 through the first signal input terminal Vin1 and the second signal input terminal Vin2, and when a touch occurs, the magnitude of the touch pressure can be determined by detecting the pressure sensing signals from the first signal output terminal Vout1 and the second signal output terminal Vout 2. According to the arrangement mode, the characteristic that the shift register scans step by step in the scanning drive circuit and the two input ends of the pressure sensor need to input bias voltage is fully utilized, the pressure sensor 10 is connected to the scanning drive circuit 20, the problem of input signal attenuation of the signal input ends 11 of different pressure sensors 10 is greatly reduced, the uniformity of pressure sensing signals is improved, and therefore the pressure sensing effect is improved.
Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention, and fig. 10 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of another array substrate according to an embodiment of the present invention. Alternatively, the first signal input terminals Vin1 of the different pressure sensors 10 are respectively connected to the output terminals of the different pressure sensing shift registers 210b, and the second signal input terminals Voin2 of the different pressure sensors 10 are respectively connected to the output terminals of the different pressure sensing shift registers 210 b. As shown in fig. 9, the first signal input terminals Vin1 of the two pressure sensors 10 are respectively connected to Sen1 and Sen2, and the second signal input terminal Vin2 is respectively connected to Sen3 and Sen 4; as shown in fig. 10, the first signal input terminals Vin1 of the two pressure sensors 10 are respectively connected to Sen1 and Sen3, and the second signal input terminal Vin2 is respectively connected to Sen2 and Sen 4. Of course, the embodiments of the present invention are not limited thereto, and similar to the embodiment shown in fig. 4, the first signal input ends of the at least two pressure sensors may be connected to the output end of the same pressure-sensitive shift register, and/or the second signal input ends of the at least two pressure sensors may be connected to the output end of the same pressure-sensitive shift register, which is not described herein again.
With continued reference to fig. 5, 9 and 10, at least one shift register 210 is disposed between the two pressure sensing shift registers 210b of the first signal input terminal Vin1 and the second signal input terminal Vin2 of the same pressure sensor 10, so as to prevent the durations of the active level signals received at the first signal input terminal Vin1 and the second signal input terminal Vin2 of the same pressure sensor 10 from overlapping to cause the instability of the bias voltage signal, thereby affecting the pressure sensing effect. Certainly, the embodiment of the invention is not limited thereto, as shown in fig. 11, in a schematic connection diagram of a scan driving circuit and a pressure sensor of another array substrate provided in the embodiment of the invention, under the condition that duration of active level signals received by a first signal input terminal Vin1 and a second signal input terminal Vin2 of the same pressure sensor 10 do not overlap, two pressure sensing shift registers 210b of the same pressure sensor 10, of which the first signal input terminal Vin1 and the second signal input terminal Vin2 are connected, are adjacent to each other.
In addition, as shown in fig. 5 and fig. 9, any two pressure-sensitive shift registers 210b are not adjacent to each other, that is, at least one display shift register 210a exists between two closest pressure-sensitive shift registers 210b, so as to prevent the time interval between the effective level signals output by the display shift registers on both sides of the consecutive pressure-sensitive shift registers from being too long to affect the display effect.
Based on the above embodiments, the structures of the display shift register and the pressure-sensitive shift register may be the same or different, and the following description specifically describes the case where the display shift register and the pressure-sensitive shift register have the same structure and include a latch module, a logic module, a reset module, and a buffer module.
Referring to fig. 12, 13 and 14, fig. 12 is a schematic diagram illustrating a connection relationship between a scan driving circuit and a pressure sensor of an array substrate according to another embodiment of the present invention, fig. 13 is a schematic diagram illustrating a structure of a shift register in fig. 12, and fig. 14 is a timing signal diagram illustrating a portion of ports of the scan driving circuit in fig. 12. Specifically, in fig. 13, the shift register includes a latch module 1, a logic module 2, a reset module 3, and a buffer module 4.
Wherein, the latch module 1 includes: a first inverter M1, an input terminal of which is connected to the first clock signal terminal CK1 of the shift register; a first tristate gate P1, whose input terminal is connected to the input terminal IN of the shift register, whose first clock input terminal CP is connected to the output terminal of the first inverter M1, and whose second clock input terminal CN is connected to the first clock signal terminal CK1 of the shift register; a second tristate gate P2, the first clock input end CP of which is connected with the first clock signal end CK1 of the shift register, the second clock input end CN of which is connected with the output end of the first inverter M1, the output end of which is connected with the output end of the first tristate gate P1, and the input end of which is connected with the cascade terminal NEXT of the shift register; and the input end of the second inverter M2 is connected to the P1 output end of the first tri-state gate, and the output end of the second inverter M2 is connected to the cascade terminal NEXT of the shift register.
The reset module 2 includes: the third switch transistor T1 has a first terminal connected to the output terminal of the first tri-state gate P1, a second terminal connected to the high level signal terminal VGH, and a control terminal connected to the reset terminal GRESET of the shift register.
The logic block 3 includes: a NAND gate NAND having a first input terminal connected to the cascade terminal NEXT of the shift register and a second input terminal connected to the second clock signal terminal CK2 of the shift register.
The buffer module 4 includes: a third inverter M3, an input terminal of which is connected to the output terminal of the NAND gate NAND; a fourth inverter M4, an input terminal of which is connected to an output terminal of the third inverter M3; the fifth inverter M5 has an input terminal connected to the output terminal of the fourth inverter M4, and an output terminal connected to the output terminal OUT of the shift register.
It should be noted that, the inverter is used to invert the input signal and output it, that is, when the input end inputs a high level signal, the output end outputs a low level signal; and when the input end of the high-level signal is input with a low-level signal, the output end of the high-level signal is output with a high-level signal.
The tri-state gate has only two operating states, one is an inverted output state and the other is a high impedance state. When a low level signal is input to a first clock input end CP of the tri-state gate and a high level signal is input to a second clock input end CN of the tri-state gate, the tri-state gate works in an inverted output state, and at the moment, if the input of the tri-state gate is the high level signal, the output signal of the tri-state gate is the low level signal; if the input of the tri-state gate is a low level signal, the output signal is a high level signal. When the first clock input end CP of the tri-state gate is a high level signal and the second clock input end CN is a low level signal, the tri-state gate operates in a high impedance state, and at this time, the output is independent of the input, and the tri-state gate can be equivalently in an open circuit state in the circuit.
It should be further noted that, in the use process, it is required to ensure that two signals input by the first clock signal input terminal CP and the second clock signal input terminal CN of the tristate gate are complementary, that is, when the CP input is a high level signal, the CN input is a low level signal; when the CP inputs a low-level signal, the CN inputs a high-level signal; otherwise, the tri-state gate cannot work normally.
A NAND gate, which has two input ends and outputs at least one low level signal and one high level signal; when two signals input by the input end of the signal processing circuit are high-level signals, the output signal is the characteristic of a low-level signal.
It should be understood that the structure of the shift register is only an example, and is not limited thereto, and in other alternative embodiments of the present invention, the shift register may also have other structures, and details are not described herein.
Referring to fig. 12 and 13, in fig. 12, the same points as those in the embodiment shown in fig. 5 are not repeated here, but the scan driving circuit 20 may include a first clock signal line CKH1 and a second clock signal line CKH 2. In general, one of the first clock input terminal CK1 and the second clock input terminal CK2 of the shift register 210 is connected to the first clock signal line CKH1, the other is connected to the second clock signal line CKH2, and the first clock input terminals CK1 of two adjacent shift registers 210 are connected to different clock signal lines of the first clock signal line CKH1 and the second clock signal line CKH2, so that the scan driving circuit 20 outputs an active level signal step by step for scanning. Of course, the scan driving circuit 20 may further include a trigger signal line connected to the first stage shift register 210 for providing the trigger signal STV, a high level signal line connected to each shift register 210 for providing a high level signal to the high level signal terminal VGH, and a reset signal line connected to each shift register 210 for providing a reset signal to the reset terminal GRESET, which are not described herein again.
With reference to fig. 12-14, when the scan driving circuit 20 is in operation, four output terminals of Gate N, Sen1, Gate N +1, and Sen 2 sequentially output active level signals, and when Sen1 outputs a high level signal, Sen 2 outputs a low level signal, so that a bias voltage signal is input to the pressure sensor 10 through the first signal input terminal Vin1 and the second signal input terminal Vin 2; in addition, when Sen 2 outputs a high level signal, Sen1 outputs a low level signal, and also inputs a bias voltage signal to the pressure sensor 10 through the first signal input terminal Vin1 and the second signal input terminal Vin 2; it can be seen that, during one frame display period, one pressure sensor 10 can perform two pressure detections, which further increases the reliability of pressure sensing.
Alternatively, on the basis of the above embodiment, the duration t2 of the active level signal output from the output terminal of one pressure-sensitive shift register 210b is longer than the duration t1 of the active level signal output from the output terminal of one display shift register 210a in one frame display period. As shown in fig. 14, the duration t2 of the active level signal output from the output terminal of the pressure sensitive shift register 210b can be specifically adjusted by adjusting the pulse width of the clock signal corresponding to the active level signal output from the output terminal of the pressure sensitive shift register 210b (in fig. 14, the output signal of the second clock signal line CKH2, i.e., the input signal of the second clock input terminal CK2 in the pressure sensitive shift register 210b of fig. 12). Since a certain time is required for the pressure sensor 10 to effectively detect, the duration t2 of the active level signal output by the output terminal of the pressure sensing shift register 210b is set to be longer than the duration t1 of the active level signal output by the output terminal of the display shift register 210a, so that the pressure sensor 10 has enough time to detect the pressure, thereby further improving the pressure sensing effect.
Referring to fig. 15, fig. 15 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention, where the touch display panel includes an array substrate 300 according to any embodiment of the present invention, and further includes an opposite substrate 400 disposed opposite to the array substrate 300.
When the touch display panel is a liquid crystal display panel, the touch display panel further includes a liquid crystal layer between the array substrate 300 and the opposite substrate 400. A thin film transistor and a pixel electrode are arranged in each sub-pixel on the array substrate 100, a gate electrode of the thin film transistor is electrically connected with a gate line, a source electrode of the thin film transistor is electrically connected with a data line, a drain electrode of the thin film transistor is electrically connected with the pixel electrode, the gate line is used for transmitting a scanning signal, namely a control signal of the thin film transistor, and the data line is used for transmitting a data signal, namely a pixel voltage signal required by the pixel electrode; the array substrate or the opposite substrate is also provided with a common electrode. Under the control of the corresponding grid line, the data line corresponding to the source electrode of the thin film transistor carries out charge and discharge to the pixel electrode corresponding to the drain electrode through the thin film transistor, an electric field is formed between the pixel electrode and the common electrode, and the deflection of liquid crystal molecules is controlled through the electric field between the pixel electrode and the common electrode, so that the display function is achieved.
When the touch display panel is an organic light emitting display panel, the touch display panel further includes an organic light emitting structure between the array substrate 300 and the opposite substrate 400. The array substrate 100 includes a plurality of pixel driving circuits, the organic light emitting structure specifically includes organic light emitting diodes, each of which includes an anode, a hole transport layer, an organic light emitting material layer, an electron transport layer, and a cathode, which are sequentially stacked, the anodes of the organic light emitting diodes are correspondingly electrically connected to the pixel driving circuits on the array substrate, and the plurality of organic light emitting diodes include red organic light emitting diodes for emitting red light, green organic light emitting diodes for emitting green light, and blue organic light emitting diodes for emitting blue light. Under the driving of external voltage, holes and electrons are respectively injected into the organic light-emitting material layer from the anode and the cathode through the hole transport layer and the electron transport layer, the holes and the electrons are compounded in the organic light-emitting material layer to release energy, the energy is transferred to molecules of the organic light-emitting material to enable the molecules to jump from a ground state to an excited state, the excited state is unstable, the excited molecules return to the ground state from the excited state, and radiation transition is carried out to generate a light-emitting phenomenon, so that a display function is achieved.
Referring to fig. 16, fig. 16 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, where the touch display device includes a touch display panel 1000 according to any embodiment of the present invention. In this embodiment, the touch display device is a mobile phone, and in other optional embodiments of the present invention, the touch display device may also be any device having a touch display function, such as a tablet computer, a notebook, a display, and the like.
The array substrate, the touch display panel and the touch display device provided by the embodiment of the invention are described in detail above, and a specific example is applied in the description to explain the principle and the embodiment of the invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An array substrate, comprising: a display area and a non-display area surrounding the display area, wherein,
The array substrate further comprises at least one pressure sensor and a scanning driving circuit positioned in the non-display area;
each of said pressure sensors comprising at least one signal input and at least one signal output;
the scanning driving circuit comprises a plurality of cascaded shift registers, and the plurality of shift registers comprise a plurality of display shift registers and at least one pressure-sensitive shift register;
the array substrate further comprises a plurality of scanning lines and a plurality of data lines which are positioned in the display area, and the plurality of scanning lines and the plurality of data lines are insulated and crossed to define a plurality of sub-pixels;
the output end of each display shift register is connected with one scanning line, the output end of each display shift register is used for outputting display signals to the display area, the output end of each pressure-sensitive shift register is connected to the signal input end of the pressure sensor, and the pressure-sensitive shift registers are not connected with the scanning lines;
in one frame display time period, the duration of the effective level signal output by the output end of one of the pressure-sensitive shift registers is longer than the duration of the effective level signal output by the output end of one of the display shift registers.
2. The array substrate of claim 1, wherein an output terminal of the same pressure-sensitive shift register is connected to signal input terminals of at least two of the pressure sensors.
3. The array substrate of claim 1, wherein each of the pressure sensors comprises two signal inputs and two signal outputs, the two signal inputs being a first signal input and a second signal input, respectively, and the two signal outputs being a first signal output and a second signal output, respectively;
the first signal input terminal and the second signal input terminal are used for inputting bias voltage signals to the pressure sensor, and the first signal output terminal and the second signal output terminal are used for outputting pressure sensing detection signals from the pressure sensor.
4. The array substrate of claim 3, wherein the first signal input terminal and the second signal input terminal of the same pressure sensor are respectively connected to the output terminals of different pressure-sensitive shift registers.
5. The array substrate of claim 4, wherein first signal input terminals of different pressure sensors are respectively connected to output terminals of different pressure-sensitive shift registers, and second signal input terminals of different pressure sensors are respectively connected to output terminals of different pressure-sensitive shift registers.
6. The array substrate of claim 3, wherein the pressure sensor is a one-piece quadrilateral structure made of a semiconductor material and comprises a first side and a second side which are oppositely arranged, and a third side and a fourth side which are oppositely arranged;
the first signal input end is located on the first edge, the second signal input end is located on the second edge, the first signal output end is located on the third edge, and the second signal output end is located on the fourth edge.
7. The array substrate of claim 3, wherein the pressure sensor comprises a first sense resistor, a second sense resistor, a third sense resistor and a fourth sense resistor;
the first end of the first sensing resistor and the first end of the fourth sensing resistor are electrically connected with the first signal input end, the second end of the first sensing resistor and the first end of the second sensing resistor are electrically connected with the first signal output end, the second end of the fourth sensing resistor and the first end of the third sensing resistor are electrically connected with the second signal output end, and the second end of the second sensing resistor and the second end of the third sensing resistor are electrically connected with the second signal input end.
8. The array substrate of any of claims 1-7, wherein any two of the pressure sensitive shift registers are not adjacent.
9. A touch display panel comprising the array substrate according to any one of claims 1 to 8.
10. A touch display device comprising the touch display panel according to claim 9.
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| CN107479766A (en) * | 2017-09-30 | 2017-12-15 | 厦门天马微电子有限公司 | A kind of array base palte, display panel and display device |
| CN107491220A (en) * | 2017-08-31 | 2017-12-19 | 厦门天马微电子有限公司 | A kind of display panel and display device |
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| CN104820520B (en) * | 2015-05-08 | 2017-10-20 | 厦门天马微电子有限公司 | The driving method of array base palte, touch-control display panel and array base palte |
| CN105244005B (en) * | 2015-11-24 | 2018-01-09 | 厦门天马微电子有限公司 | Array base palte, touch control display apparatus and its driving method |
| CN107315502B (en) * | 2017-06-30 | 2020-05-19 | 上海天马微电子有限公司 | Display panel, display device and pressure detection method |
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| CN107479766A (en) * | 2017-09-30 | 2017-12-15 | 厦门天马微电子有限公司 | A kind of array base palte, display panel and display device |
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