CN108037844B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN108037844B CN108037844B CN201711099728.4A CN201711099728A CN108037844B CN 108037844 B CN108037844 B CN 108037844B CN 201711099728 A CN201711099728 A CN 201711099728A CN 108037844 B CN108037844 B CN 108037844B
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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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- 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
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch display panel and a touch display device, wherein the touch display panel comprises an array substrate and an opposite substrate which are oppositely arranged, and the touch display panel also comprises: the cover plate is positioned on one side of the opposite substrate far away from the array substrate; the touch structure is positioned between the opposite substrate and the cover plate and comprises a touch sensing layer and at least one touch pressure sensor, the touch sensing layer is used for detecting a touch position, and the touch pressure sensor is used for detecting touch pressure; the touch sensing layer and the touch pressure sensor share one touch flexible circuit board. According to the touch display panel, the touch sensing layer for detecting the touch position and the touch pressure sensor for detecting the touch pressure are arranged between the opposite substrate and the cover plate of the touch display panel, so that the touch sensing layer and the touch pressure sensor can share one touch flexible circuit board, and the binding frequency of the flexible circuit board and the step area of the touch display panel is reduced.
Description
Technical Field
The present invention relates to the field of touch display, and in particular, to a touch display panel and a touch display device including the same.
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.
Disclosure of Invention
In view of the above, the present invention provides a touch display panel and a touch display device including the touch display panel, so as to better implement a pressure detection function of the touch display panel.
In a first aspect, an embodiment of the present invention provides a touch display panel, including an array substrate and an opposite substrate that are disposed opposite to each other, and further including: the cover plate is positioned on one side of the opposite substrate, which is far away from the array substrate; the touch structure is positioned between the opposite substrate and the cover plate and comprises a touch sensing layer and at least one touch pressure sensor, the touch sensing layer is used for detecting a touch position, and the touch pressure sensor is used for detecting touch pressure; the touch sensing layer and the touch pressure sensor share one touch flexible circuit board.
In a second aspect, an embodiment of the present invention provides a touch display device, including the touch display panel according to the first aspect.
Compared with the prior art, the touch display panel provided by the invention has the advantages that the touch sensing layer for detecting the touch position and the touch pressure sensor for detecting the touch pressure are arranged between the opposite substrate and the cover plate of the touch display panel, so that the touch sensing layer and the touch pressure sensor can share one touch flexible circuit board, the binding times of the flexible circuit board and the step area of the touch display panel are reduced, the production flow can be simplified, the product yield is improved, and the pressure detection function of the non-embedded touch display panel is better realized.
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 cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 2 is a schematic cross-sectional view of another touch display panel according to an embodiment of the invention;
fig. 3 is a schematic cross-sectional view of another touch display panel according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional view illustrating a touch display panel according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of another touch display panel according to an embodiment of the invention;
fig. 6 is a schematic cross-sectional view illustrating another touch display panel according to an embodiment of the invention;
fig. 7 is a schematic cross-sectional view illustrating a touch display panel according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;
FIG. 9 is an equivalent circuit diagram of the pressure sensor of FIG. 8;
FIG. 10 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
fig. 11 is a schematic top view of a touch display panel according to an embodiment of the invention;
fig. 12 is a schematic top view illustrating a touch structure according to an embodiment of the invention;
fig. 13 is a schematic top view illustrating another touch structure according to an embodiment of the invention;
fig. 14 is a schematic top view illustrating another touch structure according to an embodiment of the invention;
FIG. 15 is an enlarged view of a touch sensing electrode 4012 located in the dashed box X of FIG. 14;
FIG. 16 is a schematic cross-sectional view taken along line BB' of FIG. 14;
FIG. 17 is a schematic view of another cross-sectional structure taken along line BB' in FIG. 14;
fig. 18 is another enlarged view of a position of one touch sensing electrode 4012 in the dashed line box X of fig. 14;
fig. 19 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.
The liquid crystal display panel generally comprises an array substrate and a color film substrate which are arranged oppositely, and for an embedded touch liquid crystal display panel with a pressure sensing function (namely, a touch position sensing structure and a touch pressure sensor are both embedded between the array substrate and the color film substrate and arranged on the side of the array substrate), an additional pressure detection chip is required to be added for realizing the pressure sensing function at the present stage, namely, one touch display chip is used for the display and position touch functions, and one pressure detection chip is used for the pressure detection function independently; and the step area of the display panel is bound with a flexible circuit board, usually, the touch display chip is arranged in the step area of the display panel and is connected with the main board of the terminal through the flexible circuit board to receive corresponding touch or display instructions, and the pressure detection chip can be arranged on the flexible circuit board and is also connected with the main board of the terminal through the flexible circuit board.
In the existing market, a non-embedded touch display panel (that is, a touch position sensing structure is located outside a liquid crystal cell) generally comprises a display flexible circuit board and a touch flexible circuit board, the two flexible circuit boards are separately arranged, a display chip is connected with a main board of a terminal through the display flexible circuit board, and the touch chip is connected with the main board of the terminal through the touch flexible circuit board. Since the ports and corresponding wires for the pressure sensing function are not usually reserved on the display flexible circuit board, and the pressure sensing function is usually required to be used in combination with the position touch control function (for example, the touch control position is detected first, and then the pressure at the touch control position is detected), the port and the corresponding conducting wire reserved with the pressure sensing function on the touch control flexible circuit board are relatively easy to realize, in this case, if the touch pressure sensor needs to be embedded between the array substrate and the color filter substrate, not only an additional pressure detection chip is required, but also a pressure sensitive flexible circuit board is additionally bound to the step area of the display panel and connected to the touch flexible circuit board, or the touch flexible circuit board is bound to the step area of the display panel again, so that the production process is particularly complicated, and the product yield is reduced.
In view of this, an embodiment of the present invention provides a touch display panel, including an array substrate and an opposite substrate that are disposed opposite to each other, further including: the cover plate is positioned on one side of the opposite substrate, which is far away from the array substrate; the touch structure is positioned between the opposite substrate and the cover plate and comprises a touch sensing layer and at least one touch pressure sensor, the touch sensing layer is used for detecting a touch position, and the touch pressure sensor is used for detecting touch pressure; the touch sensing layer and the touch pressure sensor share one touch flexible circuit board.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a touch display panel according to an embodiment of the present invention, the touch display panel includes an array substrate 100 and an opposite substrate 200 that are disposed opposite to each other, and further includes a cover plate 300 disposed on a side of the opposite substrate 200 away from the array substrate 100; a touch structure 400 located between the opposite substrate 200 and the cover 300, the touch structure 400 including a touch sensing layer 401 and at least one touch pressure sensor 402 (two touch pressure sensors 402 are schematically shown in the figure), the touch sensing layer 401 being used for detecting a touch position, and the touch pressure sensor 402 being used for detecting a touch pressure; the touch sensing layer 401 and the touch pressure sensor 402 share a touch flexible circuit board 410.
Compared with the prior art, the touch display panel provided by the invention has the advantages that the touch sensing layer 401 for detecting the touch position and the touch pressure sensor 402 for detecting the touch pressure are arranged between the opposite substrate 200 and the cover plate 300 of the touch display panel, so that the touch sensing layer 401 and the touch pressure sensor 402 can share one touch flexible circuit board 410, the binding times of the flexible circuit board and the step area of the touch display panel are reduced, the production flow can be simplified, the product yield can be improved, and the pressure detection function of the non-embedded touch display panel can be better realized.
Specifically, the touch display panel provided by the embodiment of the invention can be a liquid crystal display panel or an organic light emitting display panel. Next, the touch display panel is a liquid crystal display panel to describe the embodiments of the present invention in detail.
Referring to fig. 2, fig. 2 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present invention, the touch display panel includes an array substrate 100 and an opposite substrate 200 that are disposed opposite to each other, and a liquid crystal layer 500 is disposed between the array substrate 100 and the opposite substrate 200; further comprises a cover plate 300 positioned on the side of the opposite substrate 200 away from the array substrate 100; a touch structure 400 located between the opposite substrate 200 and the cover 300, the touch structure 400 including a touch sensing layer 401 and at least one touch pressure sensor 402 (two touch pressure sensors 402 are schematically shown in fig. 2), the touch sensing layer 401 being used for detecting a touch position, and the touch pressure sensor 402 being used for detecting a touch pressure; the touch sensing layer 401 and the touch pressure sensor 402 share a touch flexible circuit board 410.
In the embodiment, as shown in fig. 2, the touch structure 400 is attached to the cover plate 300 through the optical adhesive 310. Of course, in this embodiment, the opposite substrate 200 may be a color filter substrate, and a structure (not shown in fig. 2) such as a color resist layer and a black matrix is disposed on the color filter substrate; the touch display panel further includes a bottom polarizer 110 on a side of the array substrate 100 away from the opposite substrate 200, a backlight module 600 (for providing a light source required for displaying for the touch display panel) on a side of the bottom polarizer 110 away from the array substrate 100, a spacer 230 between the array substrate 100 and the opposite substrate 200, and an upper polarizer 210 on a side of the opposite substrate 200 away from the array substrate 100, wherein a side of the touch structure 400 away from the cover plate 300 may also be attached to the upper polarizer 210 by an optical adhesive 220.
In addition, for the liquid crystal display panel, a plurality of gate lines and a plurality of data lines are arranged on the array substrate 100 in a crisscross insulating manner, the plurality of gate lines and the plurality of data lines define a plurality of sub-pixels, each sub-pixel is internally provided with a thin film transistor and a pixel electrode, a gate electrode of the thin film transistor is electrically connected with the gate line, a source electrode of the thin film transistor is electrically connected with the 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; the black matrix can be in a grid shape, the color resistance layer comprises a plurality of color resistances which are arranged in an array mode in the opening of the black matrix, each color resistance corresponds to one sub-pixel, and the color resistances comprise a red color resistance, a green color resistance and a blue color resistance; and the array substrate or the color film 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.
Referring to fig. 3, fig. 3 is a schematic cross-sectional view of another touch display panel, which is also a liquid crystal display panel, according to an embodiment of the present invention. The same points as those in the embodiment shown in fig. 2 are not repeated herein, but the touch structure 400 is integrated on the surface of the cover plate 300 close to the opposite substrate 200 in this embodiment, that is, the touch structure 400 of this embodiment is not additionally attached to the cover plate 300, but is directly formed on the surface of the cover plate 300 close to the opposite substrate 200 through processes such as film forming, exposure, development, etching, and the like, so as to save the manufacturing process of the touch display panel.
Referring to fig. 4, fig. 4 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present invention, where the touch display panel is also a liquid crystal display panel. The same parts as those in the embodiment shown in fig. 2 are not repeated herein, but in this embodiment, the touch structure 400 is integrated on the surface of the opposite substrate 200 near the cover 300. For the liquid crystal display panel, when the opposite substrate is a color film substrate, the color film substrate includes a substrate (not shown in fig. 4), a black matrix, a color resistor and other structures (not shown in fig. 4) are formed on a side of the substrate close to the array substrate 100, and a touch structure 400 can be formed on a side of the substrate close to the cover plate 300 through processes of film forming, exposure, development, etching and the like, so as to save a manufacturing process of the touch display panel. In this embodiment, the upper polarizer 210 and the cover plate 300 may be attached by an optical adhesive 240.
In the embodiments shown in fig. 2 to fig. 4, the touch display panel is used as a liquid crystal display panel to describe the present invention, and in other alternative embodiments of the present invention, the touch display panel may also be an organic light emitting display panel, specifically, refer to the embodiments shown in fig. 5 to fig. 7.
Referring to fig. 5, fig. 5 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present invention, the touch display panel includes an array substrate 100 and an opposite substrate 200 that are disposed opposite to each other, and an organic light emitting layer 120 is disposed between the array substrate 100 and the opposite substrate 200; further comprises a cover plate 300 positioned on the side of the opposite substrate 200 away from the array substrate 100; a touch structure 400 located between the opposite substrate 200 and the cover 300, the touch structure 400 including a touch sensing layer 401 and at least one touch pressure sensor 402 (two touch pressure sensors 402 are schematically shown in fig. 5), the touch sensing layer 401 being used for detecting a touch position, and the touch pressure sensor 402 being used for detecting a touch pressure; the touch sensing layer 401 and the touch pressure sensor 402 share a touch flexible circuit board 410.
In the embodiment, as shown in fig. 5, the touch structure 400 is attached to the cover plate 300 through the optical adhesive 310. Of course, in the present embodiment, the opposite substrate 200 may be a sealing glass or a thin film sealing layer; the touch display panel further includes a polarizer 250 on a side of the opposite substrate 200 away from the array substrate 100, and a side of the touch structure 400 away from the cover 300 may be attached to the polarizer 250 through the liquid optical adhesive 260.
In addition, for the organic light emitting display panel, the array substrate 100 includes a plurality of pixel driving circuits, the organic light emitting layer 120 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 electrically connected to the pixel driving circuits on the array substrate, and the plurality of organic light emitting diodes include a red organic light emitting diode for emitting red light, a green organic light emitting diode for emitting green light, and a blue organic light emitting diode 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. 6, fig. 6 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present invention, where the touch display panel is also an organic light emitting display panel. The same points as those in the embodiment shown in fig. 5 are not repeated herein, but the touch structure 400 is integrated on the surface of the cover plate 300 close to the opposite substrate 200 in this embodiment, that is, the touch structure 400 of this embodiment is not additionally attached to the cover plate 300, but is directly formed on the surface of the cover plate 300 close to the opposite substrate 200 through processes such as film forming, exposure, development, etching, and the like, so as to save the manufacturing process of the touch display panel.
Referring to fig. 7, fig. 7 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present invention, where the touch display panel is also an organic light emitting display panel. The same points as those in the embodiment shown in fig. 5 are not repeated herein, but the difference is that in this embodiment, the touch structure 400 is integrated on the surface of the opposite substrate 200 near the cover plate 300, and can be formed by processes such as film forming, exposure, development, etching, and the like, so as to save the manufacturing process of the touch display panel. In this embodiment, the upper polarizer 250 and the cover plate 300 may be attached by an optical adhesive 270.
In any of the above embodiments, the touch display panel further includes a touch sensing chip 411 and a pressure sensing chip 412 disposed on the touch flexible circuit board 410, the touch sensing chip 411 is electrically connected to the touch sensing layer 401 through the touch flexible circuit board 410, and the pressure sensing chip 412 is electrically connected to the pressure sensor 402 through the touch flexible circuit board 410. Of course, in some alternative embodiments, the touch sensing chip and the pressure sensing chip may be integrated into the same chip. Further, the touch display panel provided by the embodiment of the invention further includes a display chip 130 disposed on the array substrate 100 and a display flexible circuit board 140 bound to the array substrate 100, and the display flexible circuit board 140 is electrically connected to the display chip 130.
In the above embodiments, the pressure sensor 402 on the touch display panel is a strain gauge pressure sensor, and the basic principle of detecting the pressure is as follows: when pressure is applied to a certain position on the touch display panel, the position of the pressure sensor 402 has stress caused by the pressure, and under the action of the stress, the pressure sensor 402 deforms, so that the resistance of the pressure sensor 402 changes, the output value of the pressure sensor 402 changes, and the magnitude of the pressure applied to the touch display panel can be calculated through the change. The specific structure of the pressure sensor 402 may be various, and the structure of the typical pressure sensor 402 will be described below, but is not limited thereto.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention. The pressure sensor is quadrilateral (or polygonal with at least four sides), made of semiconductor material, such as amorphous silicon material or polysilicon material, and includes a first side 402a and a second side 402c which are oppositely arranged, and a third side 402b and a fourth side 402d which are oppositely arranged; the pressure sensor comprises a first power signal input terminal Vin1 at the first side 402a and a second power signal input terminal Vin2 at the second side 402c, the first power signal input terminal Vin1 and the second power signal input terminal Vin2 are electrically connected to the pressure sensing chip for inputting a bias voltage signal to the pressure sensor; the pressure sensor further includes a first sensing signal measuring terminal Vout1 located at the third side 402b and a second sensing signal measuring terminal Vout2 located at the fourth side 402d, the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 being electrically connected to the pressure sensing chip for outputting a pressure sensing signal from the pressure sensor.
Referring to fig. 9, fig. 9 is an equivalent circuit diagram of the pressure sensor in fig. 8. With reference to fig. 8 and 9, the pressure sensor may be equivalent to a wheatstone bridge, which includes four equivalent resistors, namely, an equivalent resistor R1, an equivalent resistor R2, an equivalent resistor R3 and an equivalent resistor R4, wherein the region between the second power signal input terminal Vin2 and the first sensing signal measurement terminal Vout1 is an equivalent resistor R1, the region between the second power signal input terminal Vin2 and the second sensing signal measurement terminal Vout2 is an equivalent resistor R2, the region between the first power signal input terminal Vin1 and the first sensing signal measurement terminal Vout1 is an equivalent resistor R4, and the region between the first power signal input terminal Vin1 and the second sensing signal measurement terminal Vout2 is an equivalent resistor R3. When the bias voltage signals are input to the first power signal input terminal Vin1 and the second power signal input terminal Vin2, current flows through each branch of the wheatstone bridge. At this time, when the touch display panel is pressed, the pressure sensor is subjected to a shearing force from a position corresponding to the pressure sensor on the touch display panel, and the impedance of at least one of the internal equivalent resistor R1, the equivalent resistor R2, the equivalent resistor R3 and the equivalent resistor R4 of the pressure sensor changes, so that the pressure detection signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor 12 are different from the pressure detection signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor 12 when no pressure is applied, and accordingly, the magnitude of the touch pressure can be determined.
Alternatively, in the present embodiment, the shape of the pressure sensor may be square. The advantage of this arrangement is that it is beneficial to make the resistances of the equivalent resistor R1, the equivalent resistor R2, the equivalent resistor R3 and the equivalent resistor R4 the same, so that, under the condition of no pressing, the potentials between the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are equal, and the pressure sensing signal output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 is 0, which is beneficial to simplify the calculation process of the pressure value and improve the sensitivity of the pressure sensing.
It should be noted that, the wheatstone bridge shown in fig. 9 can be interpreted as an equivalent circuit diagram of the pressure sensor shown in fig. 8, and it can also represent another structural schematic diagram of the pressure sensor, that is, four arm resistors R1, R2, R3 and R4 of the wheatstone bridge are respectively four resistors separated from each other, and similarly, a bias voltage signal can be input to the first power signal input terminal Vin1 and the second power signal input terminal Vin2, and the magnitude of the touch pressure can be determined by the pressure detection signals output by the first sensing signal measurement terminal Vout1 and the second sensing signal measurement terminal Vout 2.
Referring to fig. 10, fig. 10 is a schematic structural diagram of another pressure sensor according to an embodiment of the present invention, which may be another specific implementation of the wheatstone bridge shown in fig. 9. The pressure sensor comprises 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 sensing signal measuring 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 power 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 power 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 sensing signal measuring terminal Vout 2; the first power signal input terminal Vin1 and the second power signal input terminal Vin2 are electrically connected to the pressure sensing chip, and are used for inputting bias voltage signals to the pressure sensor; the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 are electrically connected to the pressure sensing chip for outputting a pressure sensing detection signal from the pressure sensor.
With continued reference to fig. 10, 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 the bias voltage signals are input to the first power signal input terminal Vin1 and the second power signal input terminal Vin2, current flows through each branch of the wheatstone bridge. At this time, when the display panel 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 touch display panel, so that the pressure detection signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring terminal Vout2 of the pressure sensor are different from the pressure detection signals output by the first sensing signal measuring terminal Vout1 and the second sensing signal measuring 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. 10, the pressure sensor may further include a first extending direction 100 and a second extending direction 200, the first extending direction 100 and the second extending direction 200 are arranged to intersect, a component of an extending length of the first sense resistor R1 from the first end a to the second end b in the first extending direction 100 is greater than a component in the second extending direction 200, a component of an extending length of the second sense resistor R2 from the first end b 'to the second end c in the second extending direction 200 is greater than a component in the first extending direction 100, a component of an extending length of the third sense resistor R3 from the first end d' to the second end c 'in the first extending direction 100 is greater than a component in the second extending direction 200, and a component of an extending length of the fourth sense resistor R4 from the first end a' to the second end d in the second extending direction 200 is greater than a component in the first extending direction 100. The arrangement is such that the first and third sensing resistors R1 and R3 sense strain in the first extending direction 100, and the second and fourth sensing resistors R2 and R4 sense strain in the second extending direction 200. 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.
Referring to fig. 11, fig. 11 is a schematic top view of a touch display panel according to an embodiment of the disclosure. Generally, the touch display panel includes a display area AA and a non-display area NA surrounding the display area AA, the pressure sensors 402 may be disposed in the display area AA and/or the non-display area NA of the touch display panel, and only 8 pressure sensors 402 located in the non-display area NA are shown in fig. 11, but not limited thereto. Specifically, when the pressure sensor 402 is a quadrangular sensor made of a semiconductor material shown in fig. 8, the pressure sensor 402 is optionally disposed in the non-display area NA due to a limited space of the non-light-emitting area of the display area NA; when the pressure sensor 402 includes a first sensing resistor, a second sensing resistor, a third sensing resistor, and a fourth sensing resistor, which are separated from each other, the pressure sensor 402 may be disposed in the display area AA or the non-display area NA.
In any of the above embodiments, the touch sensing layer may include a plurality of touch electrodes. In an optional implementation manner, as shown in fig. 12, which is a schematic top view of a touch structure provided in an embodiment of the present invention, the plurality of touch electrodes may be block-shaped self-capacitance touch electrodes 4010 arranged in an mxn array, where m and n are integers greater than 1 (where m is 4 and n is 3 in the figure), each block-shaped self-capacitance touch electrode 4010 is connected to at least one touch electrode trace L (one is exemplarily shown in the figure) through a via hole H, the touch electrode trace L is connected to a touch sensing chip, and the touch sensing chip is configured to provide a touch driving signal to the block-shaped self-capacitance touch electrode 4010 through the touch electrode trace L and receive a touch sensing signal from the block-shaped self-capacitance touch electrode 4010 through the touch electrode trace L. Each block-shaped self-capacitance touch electrode 4010 forms a capacitance with, for example, a zero potential point ground, when a finger touches or approaches the touch display panel, a capacitance value formed by the block-shaped self-capacitance touch electrode 4010 at a touch position is increased, and thus, when touch detection is performed, the position of the touch point, that is, a self-capacitance touch mode, can be determined by detecting a change in a corresponding capacitance value.
In another alternative implementation, as shown in fig. 13, which is a schematic top view of another touch structure provided in the embodiment of the present invention, the plurality of touch electrodes may include a plurality of strip-shaped touch driving electrodes 4010a and a plurality of strip-shaped touch sensing electrodes 4010b disposed in different layers from the touch driving electrodes 4010a, the plurality of touch sensing electrodes 4010b and the plurality of touch driving electrodes 4010a are crossed in an insulating manner (for example, 4 touch driving electrodes 4010a and 4 touch sensing electrodes 4010b are taken as an example in fig. 13), specifically, the touch driving electrodes 4010a may be arranged along an x direction and extend along a y direction, the touch sensing electrodes 4010b may be arranged along the y direction and extend along the x direction, and the x direction intersects the y direction. The touch driving electrode 4010a is connected to the touch sensing chip through the touch driving trace L1, the touch sensing electrode 4010b is connected to the touch sensing chip through the touch sensing trace L2, and the touch sensing chip is configured to provide a touch driving signal to the touch driving electrode 4010a through the touch driving trace L1 and receive a touch sensing signal from the touch sensing electrode 4010b through the touch sensing trace L2. A mutual capacitance (coupling capacitance) may be formed where the touch driving electrode 4010a and the touch sensing electrode 4010b cross, so as to implement detection of a touch position according to a variation amount of the coupling capacitance.
In yet another alternative implementation, as shown in fig. 14, which is a schematic top view of another touch structure provided in the embodiment of the present invention, the plurality of touch electrodes may also include a plurality of touch driving electrodes 4011 and a plurality of touch sensing electrodes 4012, the plurality of touch driving electrodes 4011 adjacent to each other in the same column (y direction) are connected to each other through a first connection structure 4013, and the plurality of touch sensing electrodes 4012 adjacent to each other in the same row (x direction) are connected to each other through a second connection structure 4014 (in fig. 14, 4 rows 2 are taken as an example). The same row of touch driving electrodes 4011 is connected to the touch sensing chip through the touch driving trace L1, and the same row of touch sensing electrodes 4012 is connected to the touch sensing chip through the touch sensing trace L2. The touch driving electrode 4011 can receive a touch driving signal from the touch sensing chip through the touch driving trace L1, and the touch sensing electrode 4012 can generate a touch sensing signal and transmit the touch sensing signal to the touch sensing chip through the touch sensing trace L2. Mutual capacitance (coupling capacitance) can be formed at the adjacent place of the touch sensing electrode 4012 and the touch driving electrode 4011, when a human body contacts the touch display panel, because the human body is grounded, a capacitance connected in series with the mutual capacitance is formed between the finger and the capacitive screen, and further the capacitance detected by the touch sensing electrode 4012 is reduced and a corresponding touch sensing signal can be generated, so that a specific touch occurrence position, namely a mutual capacitance detection mode, can be determined through corresponding conversion.
Further, in the above embodiments, the touch electrode may be a transparent conductive structure, such as indium tin oxide, or a metal grid structure. Taking the mutual capacitance touch manner shown in fig. 14 as an example, when the pressure sensor 402 includes a first sensing resistor R1, a second sensing resistor R2, a third sensing resistor R3 and a fourth sensing resistor R4, and the pressure sensor 402 is in the display area AA, please refer to fig. 14 and fig. 15, where fig. 15 is an enlarged view of a position where one touch sensing electrode 4012 is located in a dashed line frame X in fig. 14, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 may be all lattice structures (fig. 1 schematically shows that the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 are all made of one lattice structure, and of course, other alternative embodiments may also be made of multiple lattices structures), and a forward projection of the lattice structures on the cover board and a forward projection of the metal lattice structures of the touch electrodes are overlapped on the cover board, therefore, the space of the non-light-transmitting area in the display area AA is fully utilized, the space of the light-transmitting area is not required to be additionally occupied, and the display light transmittance of the touch display panel is improved; moreover, the pressure sensor 402 is well integrated in the display area AA in the setting mode, and the pressure sensor does not need to be set by occupying the space of the non-display area NA any more, so that the occupation ratio of the display area AA on the touch display panel can be effectively improved, the width of the non-display area NA is reduced, and the development trend of the narrow frame of the touch display panel at present is met.
In this embodiment, the first sensing resistor R1 and the second sensing resistor R2 are connected by a first connection line L12, the second sensing resistor R2 and the third sensing resistor R3 are connected by a second connection line L23, the third sensing resistor R3 and the fourth sensing resistor R4 are connected by a third connection line L34, and the fourth sensing resistor R4 and the first sensing resistor R1 are connected by a fourth connection line L41; the orthographic projections of the first connecting line L12, the second connecting line L23, the third connecting line L34 and the fourth connecting line L41 on the cover plate are superposed with the orthographic projection of the metal grid-shaped structure on the cover plate, so that the space of a non-light-transmitting area in the display area AA is fully utilized, and the display light transmittance of the touch display panel is improved. Optionally, in this embodiment, the first connection line L12, the second connection line L23, the third connection line L34, and the fourth connection line L41, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3, and the fourth sensing resistor R4 are made of the same material and are disposed in the same layer.
The connection positions of the first sensing resistor R1 and the second sensing resistor R2 with the first connection line L12 are respectively a first connection point D1 and a second connection point D2, the connection positions of the second sensing resistor R2 and the third sensing resistor R4 with the second connection line L23 are respectively a third connection point D3 and a fourth connection point D4, the connection positions of the third sensing resistor R3 and the fourth sensing resistor R4 with the third connection line L34 are respectively a fifth connection point D5 and a sixth connection point D6, and the connection positions of the fourth sensing resistor R4 and the first sensing resistor R1 with the fourth connection line L41 are respectively a seventh connection point D7 and an eighth connection point D8.
Optionally, the first connection point D1 and the second connection point D2 are respectively connected to one first pressure-sensitive signal line 4021, the third connection point D3 and the fourth connection point D4 are respectively connected to one second pressure-sensitive signal line 4022, the fifth connection point D5 and the sixth connection point D6 are respectively connected to one third pressure-sensitive signal line, the seventh connection point D7 and the eighth connection point D8 are respectively connected to one fourth pressure-sensitive signal line, that is, one first connection line L12 is correspondingly connected to two first pressure-sensitive signal lines 4021, one second connection line L23 is correspondingly connected to two second pressure-sensitive signal lines 4022, one third connection line L34 is correspondingly connected to two third pressure-sensitive signal lines 4023, and one fourth connection line L41 is correspondingly connected to two first pressure-sensitive signal lines 4024. The orthographic projection of the first pressure-sensitive signal line 4021, the second pressure-sensitive signal line 4022, the third pressure-sensitive signal line 4023 and the fourth pressure-sensitive signal line 4024 on the cover plate is overlapped with the orthographic projection of the metal latticed structure on the cover plate, so that the space of a non-light-transmitting area in the display area AA is further fully utilized, and the display light transmittance of the touch display panel is improved.
It is to be understood that one end of the first pressure-sensitive signal line 4021, the second pressure-sensitive signal line 4022, the third pressure-sensitive signal line 4023, and the fourth pressure-sensitive signal line 4024 described above is connected to the corresponding first to eighth connection points D1-D8, and the other end needs to be electrically connected to the pressure-sensitive chip to input the bias voltage signal to the pressure sensor and output the pressure-sensitive detection signal from the pressure sensor.
It should be noted that, in the present embodiment, as shown in the figure, the touch structure 400 generally includes a substrate 4000, and each film layer is formed on the substrate 4000, specifically, in the embodiment shown in fig. 2 and 5, the substrate is a single film layer, in the embodiment shown in fig. 3 and 6, the substrate is a cover plate, and in the embodiment shown in fig. 4 and 7, the substrate is an opposite substrate.
Referring to fig. 14, fig. 15 and fig. 16, in which fig. 16 is a schematic cross-sectional structure along BB 'in fig. 14, a dashed line Y in fig. 15 is a portion of the line BB' in fig. 14, the touch structure 400 includes a substrate 4001, layers of the touch structure are formed on the substrate 4001, a touch driving electrode 4011 and a touch sensing electrode 4012 are located in different layers, a first connection structure 4013 and the touch driving electrode 4011 are in the same layer, a second connection structure 4014 and the touch sensing electrode 4012 are in the same layer, the touch driving electrode 4011 is located on a side of the touch sensing electrode 4012 away from the substrate, first to fourth sensing resistors R1-R4 are optionally located on a side of the touch sensing electrode 4012 away from the substrate 4001, and the first to fourth sensing signal lines 4021 and 4024 are optionally located in the same layer as the touch driving electrode 4011. Of course, in another alternative embodiment, the touch driving electrodes and the touch sensing electrodes are located on different layers, the first connecting structures and the touch driving electrodes are located on the same layer, the second connecting structures and the touch sensing electrodes are located on the same layer, the touch sensing electrodes are located on the side of the touch driving electrodes away from the substrate, the first to fourth sensing resistors are optionally located on the side of the touch driving electrodes away from the substrate, and the first to fourth pressure sensing signal lines are optionally made of the same material as the touch sensing electrodes and are located on the same layer.
Referring to fig. 14, fig. 15 and fig. 17, in another schematic cross-sectional structure view along BB' in fig. 14, the touch driving electrode 4011 and the touch sensing electrode 4012 are located in the same layer, the first connection structure 4013 and the touch driving electrode 4011 are located in different layers, that is, the first connection structure 4013 is a bridge structure, the first connection structure 4013 connects the multiple touch driving electrodes 4011 adjacent to each other in the same column (y direction) through a via H1, the second connection structure 4014 is located in the same layer as the touch sensing electrode 4012, the first connection structure 4013 is located on a side of the touch driving electrode 4011 away from the substrate 4001, the first to fourth sensing resistors R1-R4 are optionally located on a side of the touch driving electrode 4011 and/or the touch sensing electrode 4012 away from the substrate, and the first to fourth pressure sensing signal lines 4021 and 4024 are optionally located in the same layer as the first connection structure 4013. Of course, in another alternative embodiment, the touch driving electrodes and the touch sensing electrodes are located on the same layer, the first connecting structures and the touch driving electrodes are located on the same layer, the second connecting structures and the touch sensing electrodes are located on different layers, that is, the second connecting structures are bridge-spanning structures, the second connecting structures connect the adjacent touch sensing electrodes in the same row (x direction) through via holes, the second connecting structures are located on the sides of the touch sensing electrodes away from the substrate, the first to fourth sensing resistors are optionally located on the sides of the touch driving electrodes and/or the touch sensing electrodes away from the substrate, and the first to fourth pressure sensing signal lines are optionally made of the same material as the second connecting structures and are located on the same layer.
In addition, in the embodiment, the first to fourth pressure sensitive signal lines 4021 and 4024 are electrically connected through the via H2 and the corresponding first to eighth connection points D1-D8. In this embodiment, the materials of the first to fourth sense resistors R1-R4 may be semiconductor materials, transparent conductive materials (such as indium tin oxide), metals, etc., which is not limited in this disclosure.
In the above embodiment, the first connection line L12, the second connection line L23, the third connection line L34, the fourth connection line L41, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3, and the fourth sensing resistor R4 are made of the same material and are disposed in the same layer, and the first connection line L12, the second connection line L23, the third connection line L34, the fourth connection line L41, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3, and the fourth sensing resistor R4 are directly connected into a whole. In another alternative embodiment of the invention, as shown in fig. 18, which is another enlarged view of a position of one touch sensing electrode 4012 in the dashed line frame X in fig. 14, the first connection line L12, the second connection line L23, the third connection line L34, and the fourth connection line L41 are made of the same material and are disposed in the same layer as the first pressure sensing signal line 4021, the second pressure sensing signal line 4022, the third pressure sensing signal line 4023, and the fourth pressure sensing signal line 4024. In this embodiment, the first connection line L12, the second connection line L23, the third connection line L34 and the fourth connection line L41 are located at different layers from the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4, and need to be connected through a via (not shown in fig. 18).
Referring to fig. 19, fig. 19 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, where the touch display device includes the 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 display device may also be any device with a display function, such as a tablet computer, a notebook computer, and a display.
The touch display panel and the touch display device provided by the embodiment of the invention are described in detail above, and the principle and the embodiment of the invention are explained in the present document by applying specific examples, and the description of the above embodiments 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 (18)
1. The utility model provides a touch-control display panel, includes relative array substrate and the opposition base plate that sets up, its characterized in that still includes:
the cover plate is positioned on one side of the opposite substrate, which is far away from the array substrate;
the touch structure is positioned between the opposite substrate and the cover plate and comprises a touch sensing layer and at least one touch pressure sensor, the touch sensing layer is used for detecting a touch position, and the touch pressure sensor is used for detecting touch pressure;
the touch sensing layer comprises a plurality of touch electrodes, the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes, the adjacent touch driving electrodes in the same column are connected through a first connecting structure, and the adjacent touch sensing electrodes in the same row are connected through a second connecting structure;
the pressure sensor comprises a first sensing resistor, a second sensing resistor, a third sensing resistor and a fourth sensing resistor;
the first sensing resistor is connected with the second sensing resistor through a first connecting line, the second sensing resistor is connected with the third sensing resistor through a second connecting line, the third sensing resistor is connected with the fourth sensing resistor through a third connecting line, and the fourth sensing resistor is connected with the first sensing resistor through a fourth connecting line;
the connection positions of the first sensing resistor and the first connecting line and the second sensing resistor and the first connecting line are respectively a first connecting point and a second connecting point, the connection positions of the second sensing resistor and the second connecting line and the third sensing resistor are respectively a third connecting point and a fourth connecting point, the connection positions of the third sensing resistor and the fourth sensing resistor and the third connecting line are respectively a fifth connecting point and a sixth connecting point, and the connection positions of the fourth sensing resistor and the first sensing resistor and the fourth connecting line are respectively a seventh connecting point and an eighth connecting point;
the first connection point and the second connection point are respectively connected with a first pressure-sensitive signal line, the third connection point and the fourth connection point are respectively connected with a second pressure-sensitive signal line, the fifth connection point and the sixth connection point are respectively connected with a third pressure-sensitive signal line, and the seventh connection point and the eighth connection point are respectively connected with a fourth pressure-sensitive signal line;
the first pressure-sensitive signal line, the fourth pressure-sensitive signal line and the first connecting structure are arranged on the same layer;
the touch sensing layer and the touch pressure sensor share one touch flexible circuit board.
2. The touch display panel according to claim 1, wherein the touch structure is attached to the cover plate by an optical adhesive.
3. The touch display panel of claim 1, wherein the touch structure is integrated on a surface of the cover plate on a side close to the opposite substrate.
4. The touch display panel of claim 1, wherein the touch structure is integrated on a surface of the opposite substrate on a side close to the cover plate.
5. The touch display panel according to claim 1, further comprising a touch sensing chip and a pressure sensing chip disposed on the touch flexible circuit board, wherein the touch sensing chip is electrically connected to the touch sensing layer through the touch flexible circuit board, and the pressure sensing chip is electrically connected to the pressure sensor through the touch flexible circuit board.
6. The touch display panel of claim 1, further comprising a display chip disposed on the array substrate and a display flexible circuit board bonded to the array substrate, the display flexible circuit board being electrically connected to the display chip.
7. The touch display panel according to claim 1, wherein the pressure sensor is quadrilateral, made of a semiconductor material, and includes a first side and a second side that are opposite to each other, and a third side and a fourth side that are opposite to each other;
the pressure sensor comprises a first power supply signal input end positioned on the first side and a second power supply signal input end positioned on the second side, and is used for inputting a bias voltage signal to the pressure sensor;
the pressure sensor further comprises a first sensing signal measuring end positioned on the third side and a second sensing signal measuring end positioned on the fourth side, and the first sensing signal measuring end and the second sensing signal measuring end are used for outputting pressure sensing detection signals from the pressure sensor.
8. The touch display panel of claim 1,
the first end of the first sensing resistor and the first end of the fourth sensing resistor are electrically connected with a first power signal input end, the second end of the first sensing resistor and the first end of the second sensing resistor are electrically connected with a first sensing signal measuring end, the second end of the fourth sensing resistor and the first end of the third sensing resistor are electrically connected with a second sensing signal measuring end, and the second end of the second sensing resistor and the second end of the third sensing resistor are electrically connected with a second power signal input end;
the first power signal input terminal and the second power signal input terminal are used for inputting bias voltage signals to the pressure sensor; the first sensing signal measuring end and the second sensing signal measuring end are used for outputting pressure sensing detection signals from the pressure sensor.
9. The touch display panel according to any one of claims 1 to 8, wherein the touch display panel is a liquid crystal display panel, and a liquid crystal layer is disposed between the array substrate and the opposite substrate.
10. The touch display panel according to any one of claims 1 to 8, wherein the touch display panel is an organic light emitting display panel, and an organic light emitting layer is disposed between the array substrate and the opposite substrate.
11. The touch display panel according to any one of claims 1 to 8, wherein the touch display panel includes a display area and a non-display area surrounding the display area, and the pressure sensor is disposed in the non-display area.
12. The touch display panel according to claim 8, wherein the touch display panel includes a display area and a non-display area surrounding the display area, and the pressure sensor is disposed in the display area.
13. The touch display panel according to claim 12, wherein the touch sensing layer comprises a plurality of touch electrodes, and the touch electrodes are of a metal grid structure;
the first induction resistor, the second induction resistor, the third induction resistor and the fourth induction resistor are all of a lattice structure, and the orthographic projection of the lattice structure on the cover plate is superposed with the orthographic projection of the metal lattice structure on the cover plate.
14. The touch display panel of claim 13,
the orthographic projections of the first connecting lines, the second connecting lines, the third connecting lines and the fourth connecting lines on the cover plate are superposed with the orthographic projection of the metal latticed structure on the cover plate.
15. The touch display panel according to claim 14, wherein the first connecting line, the second connecting line, the third connecting line, and the fourth connecting line are made of the same material as the first sensing resistor, the second sensing resistor, the third sensing resistor, and the fourth sensing resistor and are disposed on the same layer.
16. The touch display panel of claim 14,
the orthographic projection of the first pressure-sensitive signal line, the first pressure-sensitive signal line and the first pressure-sensitive signal line on the cover plate is superposed with the orthographic projection of the metal latticed structure on the cover plate.
17. The touch display panel according to claim 16, wherein the first connecting line, the second connecting line, the third connecting line, and the fourth connecting line are made of the same material and are disposed on the same layer as the first pressure-sensitive signal line, the second pressure-sensitive signal line, the third pressure-sensitive signal line, and the fourth pressure-sensitive signal line.
18. A touch display device comprising the touch display panel according to any one of claims 1 to 17.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108874214B (en) * | 2018-05-25 | 2021-05-04 | 业成科技（成都）有限公司 | Touch panel structure |
| CN109669570A (en) * | 2018-12-06 | 2019-04-23 | 武汉华星光电半导体显示技术有限公司 | A kind of display screen and electronic device |
| CN109670463A (en) * | 2018-12-24 | 2019-04-23 | 武汉华星光电半导体显示技术有限公司 | Organic LED display panel and its operation method |
| WO2020142933A1 (en) * | 2019-01-09 | 2020-07-16 | 京东方科技集团股份有限公司 | Pressure touch control structure, pressure touch control panel and display device |
| CN109753186A (en) * | 2019-01-29 | 2019-05-14 | 武汉华星光电半导体显示技术有限公司 | Pressure touch display device and pressure touch method |
| CN110045873A (en) * | 2019-04-26 | 2019-07-23 | 太原理工大学 | The compound pressure sensitivity touch screen of capacitance resistance |
| CN110489007B (en) * | 2019-07-24 | 2021-01-15 | 武汉华星光电半导体显示技术有限公司 | Touch panel and organic light emitting display device |
| WO2021026743A1 (en) * | 2019-08-12 | 2021-02-18 | 京东方科技集团股份有限公司 | Display apparatus and terminal |
| CN110854292B (en) * | 2019-11-08 | 2022-06-17 | 京东方科技集团股份有限公司 | Display device and manufacturing method |
| CN115605984A (en) * | 2020-03-19 | 2023-01-13 | 深圳纽迪瑞科技开发有限公司（Cn） | Preparation method of strain sensing film, strain sensing film and pressure sensor |
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