CN107037929B - Touch display panel and display device thereof - Google Patents

Touch display panel and display device thereof Download PDF

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Publication number
CN107037929B
CN107037929B CN201710307452.8A CN201710307452A CN107037929B CN 107037929 B CN107037929 B CN 107037929B CN 201710307452 A CN201710307452 A CN 201710307452A CN 107037929 B CN107037929 B CN 107037929B
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Prior art keywords
touch
level
electrode
display panel
switch
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CN107037929A (en
Inventor
陆利丰
汤碧云
黄建才
许育民
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The embodiment of the invention provides a touch display panel and a display device thereof, relates to the technical field of display, and is used for providing the edge sensitivity of the touch display panel. The touch display panel comprises N levels of touch areas, and at least one pressure touch electrode is arranged in each level of touch area; the driving circuit comprises N-level compensation units, and the N-level compensation units correspond to N-level touch areas of the touch display panel one to one; the output end of each stage of compensation unit is connected with the pressure touch electrode in the touch area of the corresponding stage, and capacitance compensation is provided for a capacitor formed by the corresponding pressure touch electrode and the reference electrode; wherein, N is more than or equal to 1 and is a positive integer. The touch display panel is suitable for a display device.

Description

Touch display panel and display device thereof
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a touch display panel and a display device thereof.
[ background of the invention ]
Touch display panels are increasingly used in various electronic devices. In the touch display panel in the prior art, a user may perform a series of operations on the device by touching or pressing the panel.
However, when a human body presses the touch display panel with the same pressure, the intensity of the electrical signal in the middle of the touch display panel is greater than that at the edge of the touch display panel, resulting in poor sensitivity at the edge of the touch display panel.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a touch display panel and a display device thereof, so as to solve the problem of poor edge sensitivity of the touch display panel in the prior art.
In a first aspect, an embodiment of the present invention provides a touch display panel, where the touch display panel includes N-level touch areas, and each level of the touch areas is provided with at least one pressure touch electrode.
The driving circuit comprises N-level compensation units, and the N-level compensation units correspond to N-level touch areas of the touch display panel one to one; the output end of each stage of compensation unit is connected with the pressure touch electrode in the touch area of the corresponding stage, and capacitance compensation is provided for a capacitor formed by the corresponding pressure touch electrode and the reference electrode; wherein, N is more than or equal to 1 and is a positive integer.
Optionally, the pressure touch electrodes are distributed in a matrix along a first direction and a second direction, a rectangular coordinate system is established with the pressure touch electrode located at the center of the touch display panel as an origin of coordinates, an x-axis direction of the rectangular coordinate system is the first direction, a y-axis direction of the rectangular coordinate system is the second direction, and a coordinate position (i, j) in the rectangular coordinate system corresponds to a distribution position of the pressure touch electrode in the matrix; taking a region surrounded by {0 < | i ≦ 1 and 0 < | j ≦ 1} as a primary touch region; taking the area enclosed by {1 < | i ≦ 2 and 1 < | j ≦ 2} as a secondary touch area; … …, taking the area surrounded by { N-1 | i | N and N-1 | j | N } as N-level touch area; the K-level compensation unit provides capacitance compensation for the pressure touch electrode in the K-level touch area, and the compensated capacitance value is increased along with the increase of the level of the compensation unit; wherein i and j are integers; k is more than or equal to 1 and less than or equal to N, and K is a positive integer.
Optionally, the kth stage compensation unit includes a switch SWKAnd a capacitor CKSaid switch SWKAnd said capacitor CKIs connected to one end of the switch SWKThe output ends of the first and second electrodes are respectively connected with all pressure touch electrodes in the Kth-level touch area; the capacitor CKThe other end of the reference electrode is connected with the reference electrode; when providing capacitance compensation for the Kth-level touch area, the switch SW is usedKThe output end of the voltage-sensing unit respectively connects all the pressure touch electrodes and the capacitor C in the Kth-level touch areaKIs conducted through the capacitor CKProviding capacitance compensation for a capacitance formed by each pressure touch electrode and a reference electrode in a K-level touch area; wherein K ═ 1, 2, 3, … …, N; c1＜C2＜C3，……，＜CN。
Optionally, each of the pressure touch electrodes corresponds to one switch SW and one capacitor C; the switch SW further comprises a control terminal, and the control terminals of all switches in the same compensation unit are connected to the same control line.
Optionally, the kth stage compensation unit includes a switch SWKAnd a capacitor CKSaid switch SWKAnd said capacitor CKIs connected to one end of the switch SWKThe output ends of the first and second electrodes are respectively connected with all pressure touch electrodes in the Kth-level touch area; the capacitor CKThe other end of the reference electrode is connected with the reference electrode; the Kth stage compensation unit further includes (K-1) switches G, wherein each switch G is located at an adjacent switch SWK-1And SWKFirst stage of switch G and switch SWK-1Is connected to the second stage of switch G and switch SWKThe input ends of the two-way valve are connected; when providing capacitance compensation for the K-th level touch area, the switches SW corresponding to the 1-K level compensation units respectively1，SW2，……，SWKAll are closed, and SW isKA switch G between every two adjacent SW is closed, and capacitance compensation is provided for a capacitance formed by each pressure touch electrode and a reference electrode in a Kth-level touch area through K capacitors C connected in parallel; wherein K ═ 1, 2, 3, … …, N; c1＝C2＝C3，……，＝CN。
Optionally, one end of the capacitor C is a compensation capacitor electrode, and the other end of the capacitor C is a reference electrode, and the compensation capacitor electrode and the pressure touch electrode are on the same layer.
Optionally, the switch SW and the switch G are both thin film transistors.
Optionally, the touch display panel further includes a plurality of sensing touch electrodes, where the sensing touch electrodes are used for sensing a touch position of a user; and determining that the pressure touch electrode is positioned in the second-level touch area through the touch position sensed by the induction touch electrode.
Optionally, the pressure touch electrode is reused as an induction touch electrode in a position touch time period, and is used for inducing a touch position of a user; the pressure touch electrode is used for detecting the touch strength of a user in a pressure touch time period; and determining that the pressure touch electrode is positioned in the second-level touch area according to the touch position sensed by the induction touch electrode.
Optionally, the pressure touch electrode is reused as a common electrode in a display time period, and receives a common voltage signal.
One of the above technical solutions has the following beneficial effects:
due to the fact that the touch control area of the touch control display panel is divided, extra compensation capacitance is obtained for the capacitance formed by each pressure touch control electrode and the reference electrode in different touch control areas, and therefore deformation capacitance of different positions in the touch control display panel tends to be equal. Therefore, the sensitivity of the whole touch display panel is improved.
In a second aspect, an embodiment of the present invention provides a display device, where the display device includes the touch display panel according to the first aspect.
One of the above technical solutions has the following beneficial effects:
according to the display device in the embodiment of the invention, as the capacitance formed by each pressure touch electrode and the reference electrode in different touch areas in the touch display panel obtains additional compensation capacitance, the deformation capacitance at different positions in the touch display panel tends to be equal. Therefore, the sensitivity of the whole touch display panel is improved, and further, the sensitivity of the display device is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 3 is a second schematic structural diagram of a touch display panel according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a level 1 touch area according to an embodiment of the present invention;
fig. 5 is a schematic distribution diagram of a touch area on a touch display panel according to an embodiment of the present invention;
fig. 6 is a third schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 7 is a driving timing diagram of a touch display panel according to an embodiment of the invention;
fig. 8 is a second cross-sectional view of a touch display panel according to an embodiment of the invention;
fig. 9 is a schematic diagram of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that although the terms level 1, level 2, level 3, etc. may be used to describe the touch areas or the compensation units in the embodiments of the present invention, these touch areas or compensation units should not be limited to these terms. These terms are only used to distinguish the touch area or the compensation unit from each other. For example, without departing from the scope of the embodiments of the present invention, the level 1 touch area may also be referred to as a level 2 touch area, and similarly, the level 2 touch area may also be referred to as a level 1 touch area; similarly, the 1-stage compensation unit can also be referred to as a 2-stage compensation unit.
The embodiment of the invention provides a touch display panel, which comprises N levels of touch areas, wherein each level of touch area is provided with at least one pressure touch electrode.
The driving circuit comprises N-level compensation units, and the N-level compensation units correspond to N-level touch areas of the touch display panel one to one; the output end of each stage of compensation unit is connected with the pressure touch electrode in the touch area of the corresponding stage, and capacitance compensation is provided for a capacitor formed by the corresponding pressure touch electrode and the reference electrode; wherein, N is more than or equal to 1 and is a positive integer.
Further, in a possible implementation scheme, the pressure touch electrodes are distributed in a matrix along a first direction and a second direction, a rectangular coordinate system is established with the pressure touch electrode located at the center of the touch display panel as an origin of coordinates, an x-axis direction of the rectangular coordinate system is the first direction, a y-axis direction of the rectangular coordinate system is the second direction, and a coordinate position (i, j) in the rectangular coordinate system corresponds to a distribution position of the pressure touch electrode in the matrix; taking a region surrounded by {0 < | i ≦ 1 and 0 < | j ≦ 1} as a primary touch region; taking the area enclosed by {1 < | i | < 2 and 1 < | j | < 2} as a secondary touch area; … …, taking the area surrounded by { N-1 | i | N and N-1 | j | N } as N-level touch area; the K-level compensation unit provides capacitance compensation for the pressure touch electrode in the K-level touch area, and the compensated capacitance value is increased along with the increase of the level of the compensation unit; wherein i and j are integers; k is more than or equal to 1 and less than or equal to N, and K is a positive integer.
Illustratively, in a particular implementation, the K-th stage compensation unit includes a switch SWKAnd a capacitor CKSwitch SWKAnd capacitor CKIs connected to one end of a switch SWKRespectively with the K-th stageAll pressure touch electrodes in the control area are connected; capacitor CKThe other end of the reference electrode is connected with the reference electrode; when providing capacitance compensation for the Kth-level touch area, the switch SW is usedKThe output end of the voltage-sensing unit respectively connects all the pressure touch electrodes and the capacitor C in the Kth-level touch areaKIs conducted through the capacitor CKProviding capacitance compensation for a capacitance formed by each pressure touch electrode and a reference electrode in a K-level touch area; wherein K ═ 1, 2, 3, … …, N; c1＜C2＜C3，……，＜CN。
Furthermore, each pressure touch electrode corresponds to a switch SW and a capacitor C; the switch SW further comprises a control terminal, the control terminals of all switches within the same compensation unit being connected to the same control line.
Illustratively, in another particularly implementable aspect, the compensation unit includes a switch SW at the kth stageKAnd a capacitor CKSwitch SWKAnd capacitor CKIs connected to one end of a switch SWKThe output ends of the first and second electrodes are respectively connected with all pressure touch electrodes in the Kth-level touch area; capacitor CKThe other end of the reference electrode is connected with the reference electrode; the K-th stage compensation unit further comprises (K-1) switches G, wherein each switch G is located adjacent to a switch SWK-1And SWKFirst stage of switch G and switch SWK-1Is connected to the second stage of switch G and switch SWKThe input ends of the two-way valve are connected; when providing capacitance compensation for the K-th level touch area, the switches SW corresponding to the 1-K level compensation units respectively1，SW2，……，SWKAll are closed, and SW isKA switch G between every two adjacent SW is closed, and capacitance compensation is provided for a capacitance formed by each pressure touch electrode and a reference electrode in a Kth-level touch area through K capacitors C connected in parallel; wherein K ═ 1, 2, 3, … …, N; c1＝C2＝C3，……，＝CN。
More specifically, one end of the capacitor C is a compensation capacitor electrode, the other end is a reference electrode, and the compensation capacitor electrode and the pressure touch electrode are on the same layer.
The switch SW and the switch G are both thin film transistors.
Illustratively, in another implementation scheme, the touch display panel further includes a plurality of sensing touch electrodes, and the sensing touch electrodes are used for sensing a touch position of a user; and determining that the pressure touch electrode is positioned in the second-level touch area by sensing the touch position sensed by the touch electrode.
Specifically, the pressure touch electrode is reused as an induction touch electrode in a position touch time period and is used for inducing the touch position of the user; the pressure touch electrode is used for detecting the touch force of a user in a pressure touch time period; and determining that the pressure touch electrode is positioned in the second-level touch area by sensing the touch position sensed by the touch electrode.
Specifically, the pressure touch electrode is multiplexed as a common electrode in a display time period, and receives a common voltage signal.
When a user presses the touch display panel, in the prior art, the deformation amount in the middle of the pressing position is larger than that of the edge, so that the deformation capacitance in the middle is larger than that of the edge. Therefore, the sensitivity of the edge is further deteriorated. For the whole touch display panel, the sensitivity value of the edge of the touch display panel is much smaller than that of the center of the touch display panel. According to the touch display panel provided by the embodiment of the invention, because the touch area of the touch display panel is divided, the capacitance formed by each pressure touch electrode and the reference electrode in different touch areas obtains extra compensation capacitance, so that the deformation capacitance at different positions in the touch display panel tends to be equal. Thus improving the sensitivity of the entire touch display panel 10.
In a possible implementation, the switch may be implemented by a Complementary Metal Oxide Semiconductor (CMOS) transistor, and accordingly, the control terminal of the switch may be a gate of the CMOS transistor, the signal output terminal of the switch may be a drain of the CMOS transistor, and the signal input terminal of the switch may be a source of the CMOS transistor, or the control terminal of the switch may be a gate of the CMOS transistor, the signal output terminal of the switch may be a source of the CMOS transistor, and the signal input terminal of the switch may be a drain of the CMOS transistor.
Alternatively, in another possible implementation, the switch may be implemented using a thin film transistor. Accordingly, the control terminal of the switch may be a gate of the thin film transistor, the signal output terminal of the switch may be a drain of the thin film transistor, and the signal input terminal of the switch may be a source of the thin film transistor, or the control terminal of the switch may be a gate of the thin film transistor, the signal output terminal of the switch may be a source of the thin film transistor, and the signal input terminal of the switch may be a drain of the thin film transistor.
Please refer to fig. 1, which is a schematic structural diagram of a touch display panel according to an embodiment of the present invention. As shown in fig. 1, the touch display panel 10 includes: a level 1 touch area 101, a level 2 touch area 102, and a level three touch area 103, wherein each level of touch area includes at least one pressure touch electrode therein.
The touch display panel 10 further includes a driving circuit 100, wherein the driving circuit 100 includes a level-1 compensation unit B1, a level-2 compensation unit B2, and a level-3 compensation unit B3. The 3-level touch areas correspond to the 3-level compensation units one by one. The 1-level compensation unit comprises a switch SW1 and a capacitor C1, and the output end of the switch SW1 is respectively connected with all pressure touch electrodes in the 1-level touch area; the input of switch SW1 is connected to capacitor C1. Through the switch SW1, the capacitor C1 provides capacitance compensation for the capacitance formed by each pressure touch electrode and the reference electrode in the level 1 touch area. The compensation method and connection method of the 2-level compensation unit and the 3-level compensation unit are similar to those of the 1-level compensation unit, and are not described herein.
According to the touch display panel, the touch display panel is divided into N-level touch areas, the N-level touch areas correspond to the N-level compensation units one by one, and therefore the corresponding compensation units provide capacitance compensation for the corresponding touch areas, so that the deformation capacitance value of the edge position of the touch display panel is increased, and further, the sensitivity of the edge position of the touch display panel is increased.
It should be noted that, as an example, the touch display panel 10 shown in fig. 1 only shows 3-level touch areas and 3-level compensation units, in fact, the number of touch areas on the touch display panel 10 is much greater than 3, and the number of compensation units is also much greater than 3. In addition, in this embodiment, the position of the touch area is only schematic and does not represent an actual position.
In addition, the K-th level compensation unit provides capacitance compensation for the pressure touch electrode in the K-th level touch area, and the compensated capacitance value is increased along with the increase of the level of the compensation unit; k is more than or equal to 1 and less than or equal to N, and K is a positive integer. Correspondingly, the compensation capacitance value C1 < C2 < C3. As the touch area level increases, the relative position is closer to the edge of the touch display panel. In the prior art, the deformation capacitance at the position close to the edge is small, so that the sensitivity is poor. Therefore, when reverse thinking is taken, the deformation capacitance at the edge position can be greatly compensated, so that the total capacitance value at the edge position is increased, and the sensitivity of the edge position is improved.
In order to make the present invention more clearly understood by those skilled in the art, the following will briefly explain the pressure touch principle by taking fig. 2 as an example:
fig. 2 is a cross-sectional view of a touch display panel according to an embodiment of the invention. The touch display panel 10 includes a substrate 11 and a reference electrode 21, a pressure touch electrode 20 is disposed on the substrate 11, and the pressure touch electrode 20 and the reference electrode 21 form a capacitor. When the user presses the touch display panel 10, the pressure touch electrode 20 at the corresponding position and the reference electrode 21 form a deformation capacitance Δ C, Δ C ∈ S/Δ d, where ∈ denotes a dielectric constant, S denotes a facing area, and Δ d denotes a deformation distance. ε and S are known parameters that cause a change in the deformation capacitance Δ C when the deformation distance Δ d is changed. Since the intermediate deformation distance Δ d is different from the edge deformation distance Δ d, the values of the intermediate deformation capacitance Δ C and the edge deformation capacitance Δ C are different, and the edge sensitivity is poor. Therefore, in the embodiment provided by the invention, the capacitance compensation is provided for the edge deformation capacitance Δ C, so that the edge sensitivity is improved.
More specifically, as shown in fig. 3, it is a second schematic structural diagram of the touch display panel according to the embodiment of the present invention. The touch display panel 10 includes a level 1 touch area 101 and a level 2 touch area 102. Each level of touch area includes at least one pressure touch electrode 20.
In addition, the touch display panel further comprises a driving circuit, and the driving circuit comprises a 1-level compensation unit and a 2-level compensation unit. The level 1 compensation unit corresponds to the level 1 touch area and provides capacitance compensation for a capacitance formed by each pressure touch electrode 20 and the reference electrode in the level 1 touch area. The level 2 compensation unit corresponds to the level 2 touch area and provides capacitance compensation for a capacitance formed by each pressure touch electrode 20 and the reference electrode in the level 2 touch area.
With continued reference to fig. 3, each pressure touch electrode 20 is connected to a separate capacitor C through a separate switch SW. One end of the capacitor C is connected to the input terminal of the switch SW, and the other end is connected to the reference electrode. Each capacitor C provides capacitance compensation for the capacitance formed by the corresponding pressure touch electrode 20 and the reference electrode. The switch SW further includes a control terminal, and the control terminals of all the switches of the stage 1 compensation unit are connected to the enable terminal EN1 through the control line 1. The enabling terminal EN1 can control the on or off of all the switches SW in the 1-stage compensation unit. Thereby, further, capacitance compensation is provided for the capacitance formed by each pressure touch electrode 20 and the reference electrode in the 1-level compensation area. Therefore, when the user presses any pressure touch electrode 20 in the level 1 touch area, capacitance compensation can be provided for the capacitance formed by the pressure touch electrode 20 and the reference electrode through the enable terminal EN 1. Compared with the control of a plurality of switches, the switch SW is controlled to be switched on or off through the starting end EN1, on one hand, wiring in a driving circuit is reduced, and the problem of short circuit is effectively avoided; on the other hand, capacitance compensation is provided by the capacitance formed by the pressure touch electrode 20 and the reference electrode, so that the pressing electric signal is enhanced, and the sensitivity of the corresponding position is improved.
It should be noted that the manner in which the level-2 compensation unit provides capacitance compensation for the capacitance formed by each pressure touch electrode 20 and the reference electrode in the level-2 touch area 102 is the same as the manner in which the level-1 compensation unit provides capacitance compensation for the level-1 touch area, and details thereof are not repeated here. In addition, as an example, fig. 3 only shows the 2-level touch areas and the 2-level compensation units, in fact, the number of the touch areas on the touch display panel 10 is much greater than 2, and the number of the compensation units is also much greater than 2.
For example, fig. 4 is a schematic structural diagram of a level 1 touch area provided in the embodiment of the present invention. As shown in fig. 4, the level 1 touch area includes pressure touch electrodes 1011-1018, each of which is connected to the output terminal of the switch SW1, and provides capacitance compensation for the capacitance formed by each of the pressure touch electrodes and the reference electrode through the capacitor C1. The compensation capacitance values obtained by the pressure touch electrodes 1011-1018 are the same.
It should be noted that, as an example, the touch display panel 10 shown in fig. 4 only shows the level 1 touch areas, actually, the number of the touch areas on the touch display panel 10 is much greater than 1, and the number of the touch areas and the number of the compensation units on the touch display panel are not particularly limited in the embodiment of the present invention. In addition, the number of the pressure touch electrodes included in the touch areas of different levels is different, and as an example, the level 1 touch area in fig. 4 includes 8 pressure touch electrodes.
Capacitance compensation is performed on different touch areas, so that the sensitivity of the corresponding touch areas can be improved. Furthermore, in order to reasonably compensate for the capacitance formed by each pressure touch electrode and the reference electrode in the touch area, all the pressure touch electrodes can be arranged. Fig. 5 is a schematic distribution diagram of touch areas on a touch display panel according to an embodiment of the present invention. The touch areas on the touch display panel 10 are distributed as follows:
the pressure touch electrodes 20 are distributed in a matrix along a first direction and a second direction (the number of rows and columns of the matrix is greater than or equal to 2), a rectangular coordinate system is established by taking the pressure touch electrode 20 positioned at the center of the touch display panel 10 as a coordinate origin, the x-axis direction of the rectangular coordinate system is the first direction, the y-axis direction of the rectangular coordinate system is the second direction, and the coordinate positions (i, j) in the rectangular coordinate system correspond to the distribution positions of the pressure touch electrodes 20 in the matrix; taking a region enclosed by {0 < | i | ≦ 1 and 0 < | j | ≦ 1} as a primary touch region 101; taking a region surrounded by {1 < | i ≦ 2 and 1 < | j ≦ 2} as a secondary touch region 102; taking a region surrounded by {2 < | i ≦ 3 and 2 < | j ≦ 3} as a 3-level touch region 103; wherein i and j are integers. For example, the coordinate value (3, 3) represents a pressure touch electrode at a coordinate position (i is 3, and j is 3).
It can be understood that, because the sensitivity of the pressure touch electrode located on the origin of coordinates is strong, the capacitance formed by the pressure touch electrode at the position and the reference electrode is not compensated for. In addition, the capacitance formed by the pressure touch electrode and the reference electrode is also used as a reference. That is, the sum of the capacitance formed by the pressure touch electrode and the reference electrode in the level-1 touch area and the obtained compensation capacitance is equal to the capacitance formed by the touch electrode and the reference electrode on the origin of coordinates.
Further, the number of the pressure touch electrodes included in each level touch area can be calculated according to the following formula: (2N +1)2-(2N-1)2And N represents a touch area of the second level. Illustratively, the level 2 touch area includes 16 pressure touch electrodes, the level 3 touch area includes 24 pressure touch electrodes, … …, and the level N touch area includes 8N pressure touch electrodes.
It should be noted that, as an example, the touch display panel 10 shown in fig. 5 only shows 3-level touch areas and 3-level compensation units, in fact, the number of touch areas on the touch display panel 10 is much greater than 3, and the number of compensation units is also much greater than 3.
In a more specific embodiment, as shown in fig. 6, it is a third schematic structural diagram of a touch display panel provided in the embodiment of the present invention. The touch display panel 10 includes: a level 1 touch area 101, a level 2 touch area 102, and a level three touch area 103, wherein each level of touch area includes at least one pressure touch electrode therein.
The touch display panel 10 further includes a driving circuit 100, wherein the driving circuit 100 includes a level-1 compensation unit B1, a level-2 compensation unit B2, and a level-3 compensation unit B3. The 3-level touch areas correspond to the 3-level compensation units one by one. The 1-level compensation unit comprises a switch SW1 and a capacitor C1, and the output end of the switch SW1 is respectively connected with all pressure touch electrodes in the 1-level touch area 101; the input of switch SW1 is connected to capacitor C1. When the capacitance compensation is provided for the capacitance formed by each pressure touch electrode and the reference electrode in the level-1 touch area, the switch SW1 is closed, and the capacitance compensation is provided for the capacitance formed by each pressure touch electrode and the reference electrode through the capacitor C1, where the compensation capacitance value is C1.
With continued reference to fig. 6, the level 2 compensation unit includes a switch SW2 and a capacitor C2, and the output terminals of the switch SW2 are respectively connected to all the pressure touch electrodes in the level 2 touch area 102; the input of switch SW2 is connected to capacitor C2. The 2-stage compensation unit further includes a switch G2, a switch G2 is located between the switch SW1 and the switch SW2, a first stage of the switch G2 is connected to an input of the switch SW1, and a second stage of the switch G2 is connected to an input of the switch SW 2. When capacitance compensation is provided for the capacitance formed by each pressure touch electrode and the reference electrode in the 2-level touch area, both switches SW2 and SW1 are closed, and switch G2 located between switch SW1 and switch SW2 is also closed. Thus the capacitors that provide capacitance compensation for the level 2 touch area include C1 and C2. That is, the compensation capacitance is the sum of C1 and C2.
Similarly, the unit with 3-level compensation provides a capacitance compensation value for the 3-level touch area, which is the sum of C1, C2 and C3. The connection relationship of the switch SW3, the capacitor C3 and the switch G3 in the 3-stage compensation unit can refer to the connection relationship of the switch and the capacitor responding in the 2-stage compensation unit, and is not described herein again.
It is noted that in this embodiment, the compensation capacitance values C1, C2, and C3 are equal. The same capacitance value is more advantageous for the layout of the driving circuit, that is, the same capacitor can be mounted in the driving circuit, saving manufacturing cost.
On the basis of the foregoing embodiments, in an optional implementation manner, the touch display panel further includes a plurality of sensing touch electrodes, where the sensing touch electrodes are used for sensing a touch position of a user; and determining that the pressure touch electrode is positioned in the second-level touch area by sensing the touch position sensed by the touch electrode. In another optional implementation, the pressure touch electrode is reused as an induction touch electrode in a position touch time period, and is used for inducing the touch position of the user; the pressure touch electrode is used for detecting the touch force of a user in a pressure touch time period; and determining that the pressure touch electrode is positioned in the second-level touch area by sensing the touch position sensed by the touch electrode. Further, the pressure touch electrode can be reused as a common electrode in a display time period to receive a common voltage signal.
Next, taking the example that the pressure touch electrode of the display panel shown in fig. 3 is reused as the sensing touch electrode in the position touch time period and is reused as the common electrode in the display time period as an example, refer to fig. 7, which is a driving timing diagram of the touch display panel provided in the embodiment of the present invention, and specifically is a driving timing diagram within one frame time. Referring to fig. 3 and 7, in the present embodiment, the pressure touch electrode is multiplexed as the sensing touch electrode in the position touch time period T and is multiplexed as the common electrode in the display time period D. Specifically, referring to fig. 8, a second cross-sectional view of the touch display panel according to the embodiment of the invention is shown. The touch display panel 20 comprises a liquid crystal display panel and a backlight module 3, wherein the liquid crystal display panel comprises an array substrate 1 and a color film substrate 2 which are oppositely arranged, and a liquid crystal layer 12 positioned between the array substrate 1 and the color film substrate 2. A plurality of sub-pixels (not shown) defined by a plurality of rows of gate lines (not shown) and a plurality of columns of data lines (not shown) are disposed on the array substrate 1, and a thin film transistor (not shown), a pixel electrode (not shown) and a common electrode 20 are disposed in each sub-pixel. The grid electrode of each thin film transistor is connected with a grid line, the source electrode of each thin film transistor is connected with a data line, and the drain electrode of each thin film transistor is connected with a pixel electrode. Under the control of the corresponding gate line, the data line corresponding to the source electrode of the thin film transistor charges and discharges to the pixel electrode corresponding to the drain electrode through the thin film transistor, and an electric field is formed between the pixel electrode and the common electrode 20. When the liquid crystal display panel displays, i.e. in the display period D, the common electrode 20 receives a common voltage signal (as shown in fig. 7, it is usually a constant voltage signal), and an electric field is formed between the pixel electrode and the common electrode 20 to control the rotation of the liquid crystal molecules in the liquid crystal layer, so as to achieve the display function. In this embodiment, the common electrode 20 is reused as the sensing touch electrode in the position touch time period T, a pulse signal may be provided to each sensing touch electrode 20 in a self-capacitance detection manner, a touch position is determined by detecting a sensing signal on the sensing touch electrode, and it is determined that the sensing touch electrode is located in the second-level touch area; in the pressure touch time period F, the pressure touch electrodes are multiplexed, and corresponding capacitance compensation is performed according to the located touch area, and at this time, the switch SW is controlled to be closed by providing corresponding voltage signals to the enable terminals EN1, EN2 and the like.
In addition, in the present embodiment, the reference electrode may be a backlight plate 31 of the backlight module 3. And providing pulse signals for each induction touch electrode in a self-capacitance detection mode in the position touch time period T. In the pressure touch period F, the backlight panel 31 and the pressure touch electrode 20 form a capacitor, and the user instruction is realized by detecting the deformation capacitance value.
Fig. 9 is a schematic view of a display device according to an embodiment of the present invention. The display device 500 includes the touch display panel 10. It should be noted that fig. 9 exemplifies a mobile phone as an example of the display device, but the display device is not limited to the mobile phone, and specifically, the display device may include, but is not limited to, any electronic device having a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a tablet Computer (tablet Computer), an MP4 player, or a television.
When a user presses the touch display panel 10 in the display device 500, the deformation amount in the middle of the touch display panel is larger than that in the edge in the prior art, so that the deformation capacitance in the middle is larger than that in the edge. Therefore, the sensitivity of the edge of the touch display panel is further poor. According to the display device in the embodiment of the invention, as the capacitance formed by each pressure touch electrode and the reference electrode in different touch areas in the touch display panel obtains additional compensation capacitance, the deformation capacitance at different positions in the touch display panel tends to be equal. Therefore, the sensitivity of the entire touch display panel 10 is improved, and further, the sensitivity of the display device 500 is improved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. The touch display panel is characterized by comprising N levels of touch areas, wherein each level of touch area is provided with at least one pressure touch electrode;
the driving circuit comprises N-level compensation units, and the N-level compensation units correspond to N-level touch areas of the touch display panel one to one; the output end of each stage of compensation unit is connected with the pressure touch electrode in the touch area of the corresponding stage, and capacitance compensation is provided for a capacitor formed by the corresponding pressure touch electrode and the reference electrode;
wherein, N is not less than 1 and is a positive integer;
the K-th stage compensation unit comprises a switch SWKAnd a capacitor CKSaid switch SWKAnd said capacitor CKIs connected to one end of the switch SWKThe output ends of the first and second electrodes are respectively connected with all pressure touch electrodes in the Kth-level touch area; the capacitor CKThe other end of the reference electrode is connected with the reference electrode;
the K-th stage compensation unit further comprises K-1 switches G, wherein each switch G is positioned on the adjacent switch SWK-1And SWKFirst stage of switch G and switch SWK-1Is connected to the second stage of switch G and switch SWKThe input ends of the two-way valve are connected;
when providing capacitance compensation for the K-th level touch area, the switches SW corresponding to the 1-K level compensation units respectively1，SW2，……，SWKAll are closed, and SW isKA switch G between every two adjacent SW is closed, and capacitance compensation is provided for a capacitance formed by each pressure touch electrode and a reference electrode in a Kth-level touch area through K capacitors C connected in parallel;
wherein, K is 1, 2, 3, …….，N；C1＝C2＝C3，……，＝CN。
2. The touch display panel according to claim 1, wherein the pressure touch electrodes are distributed in a matrix along a first direction and a second direction, a rectangular coordinate system is established with the pressure touch electrode located at the center of the touch display panel as an origin of coordinates, an x-axis direction of the rectangular coordinate system is the first direction, a y-axis direction of the rectangular coordinate system is the second direction, and a coordinate position (i, j) in the rectangular coordinate system corresponds to a distribution position of the pressure touch electrodes in the matrix;
taking a region surrounded by {0 < | i ≦ 1 and 0 < | j ≦ 1} as a primary touch region; taking the area enclosed by {1 < | i | < 2 and 1 < | j | < 2} as a secondary touch area; … …, taking the area surrounded by { N-1 | i | N and N-1 | j | N } as N-level touch area;
the K-level compensation unit provides capacitance compensation for the pressure touch electrode in the K-level touch area, and the compensated capacitance value is increased along with the increase of the level of the compensation unit;
wherein i and j are integers; k is more than or equal to 1 and less than or equal to N, and K is a positive integer.
3. The touch display panel of claim 1, wherein one end of the capacitor C is a compensation capacitor, and the other end of the capacitor C is a reference electrode, and the compensation capacitor and the pressure touch electrode are on the same layer.
4. The touch display panel of claim 1, wherein the switch SW and the switch G are both thin film transistors.
5. The touch display panel according to any one of claims 1 to 2, further comprising a plurality of sensing touch electrodes for sensing a touch position of a user;
and determining that the pressure touch electrode is positioned in the second-level touch area through the touch position sensed by the induction touch electrode.
6. The touch display panel according to any one of claims 1 to 2, wherein the pressure touch electrode is reused as an induction touch electrode in a position touch time period for inducing a touch position of a user;
the pressure touch electrode is used for detecting the touch strength of a user in a pressure touch time period;
and determining that the pressure touch electrode is positioned in the second-level touch area according to the touch position sensed by the induction touch electrode.
7. The touch display panel according to any one of claims 1 to 2, wherein the pressure touch electrode is reused as a common electrode in a display time period to receive a common voltage signal.
8. A display device comprising the touch display panel according to any one of claims 1 to 7.
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108646945B (en) * 2018-05-10 2021-10-22 昆山国显光电有限公司 Touch panel, touch display panel and display device
CN108509100A (en) * 2018-05-30 2018-09-07 北京硬壳科技有限公司 A kind of capacitive touch device
CN111061398B (en) * 2019-12-24 2023-10-20 武汉天马微电子有限公司 Touch display panel, touch compensation method thereof and touch display device
US11829568B2 (en) * 2020-09-27 2023-11-28 Chengdu Boe Optoelectronics Technology Co., Ltd. Touch control structure and display apparatus
CN112578940B (en) * 2020-12-18 2022-06-10 武汉华星光电半导体显示技术有限公司 Display panel and display device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101256293A (en) * 2007-03-02 2008-09-03 三星电子株式会社 Display apparatus containing integrated touch sensor
CN104777942A (en) * 2015-05-08 2015-07-15 厦门天马微电子有限公司 Touch control display panel, driving method and touch control display device
CN105378618A (en) * 2013-04-08 2016-03-02 李圣昊 Capacitive touch detection means and detection method
CN205247346U (en) * 2015-12-08 2016-05-18 厦门天马微电子有限公司 Touch -control display panel and touch -control display device
CN105955522A (en) * 2016-04-20 2016-09-21 厦门天马微电子有限公司 Touch control display and drive method thereof
CN106095184A (en) * 2016-06-20 2016-11-09 厦门天马微电子有限公司 Touch-control display panel and using method, detection method
CN106164833A (en) * 2014-03-31 2016-11-23 德州仪器公司 Capacitive sensing system
CN205899211U (en) * 2016-06-17 2017-01-18 上海天马微电子有限公司 Array substrate, display panel and display device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101256293A (en) * 2007-03-02 2008-09-03 三星电子株式会社 Display apparatus containing integrated touch sensor
CN105378618A (en) * 2013-04-08 2016-03-02 李圣昊 Capacitive touch detection means and detection method
CN106164833A (en) * 2014-03-31 2016-11-23 德州仪器公司 Capacitive sensing system
CN104777942A (en) * 2015-05-08 2015-07-15 厦门天马微电子有限公司 Touch control display panel, driving method and touch control display device
CN205247346U (en) * 2015-12-08 2016-05-18 厦门天马微电子有限公司 Touch -control display panel and touch -control display device
CN105955522A (en) * 2016-04-20 2016-09-21 厦门天马微电子有限公司 Touch control display and drive method thereof
CN205899211U (en) * 2016-06-17 2017-01-18 上海天马微电子有限公司 Array substrate, display panel and display device
CN106095184A (en) * 2016-06-20 2016-11-09 厦门天马微电子有限公司 Touch-control display panel and using method, detection method

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