CN107203299B - Touch display device and display equipment - Google Patents
Touch display device and display equipment Download PDFInfo
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- CN107203299B CN107203299B CN201710396251.XA CN201710396251A CN107203299B CN 107203299 B CN107203299 B CN 107203299B CN 201710396251 A CN201710396251 A CN 201710396251A CN 107203299 B CN107203299 B CN 107203299B
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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
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The embodiment of the invention discloses a touch display device and display equipment, wherein the touch display device comprises: a first substrate; a second substrate disposed opposite to the first substrate; the first pressure sensing electrode is arranged on one side of the first substrate, which is far away from the second substrate; the second pressure sensing electrode is arranged on one side of the first pressure sensing electrode close to the second substrate; the third pressure sensing electrode is arranged on one side, far away from the first pressure sensing electrode, of the second pressure sensing electrode; the capacitance value between the second pressure sensing electrode and the first pressure sensing electrode is a first capacitance; the capacitance value between the second pressure sensing electrode and the third pressure sensing electrode is a second capacitance; in the pressure touch detection stage of the touch detection stage, the pressure value received by the pressure touch detection stage is determined by detecting the capacitance value variation of the first capacitor and the capacitance value variation of the second capacitor, the pressure detection is sensitive, and the pressure detection performance of the display device can be improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a touch display device and display equipment.
Background
The integrated touch display device integrates the touch detection device in the display device, has the display function and the position touch detection function, is convenient to use and good in human-computer communication experience, and is light and thin in terminal equipment and high in integration level, so that the integrated touch display device is widely favored by the market.
Specifically, the related art display panel is generally provided with a first pressure-sensitive detection electrode and a second pressure-sensitive detection electrode, and detects a pressure change at the time of pressing by detecting a change in capacitance formed between the first pressure-sensitive detection electrode and the second pressure-sensitive detection electrode at the time of pressing.
However, in the conventional display panel adopting the integrated touch technology, when the display panel is pressed, the capacitance value between the first pressure-sensitive detection electrode and the second pressure-sensitive detection electrode changes slightly, so that the pressure-sensitive detection effect is not ideal.
Disclosure of Invention
In view of this, embodiments of the present invention provide a touch display device and a display apparatus, so as to solve the technical problem in the prior art that the pressure sensing detection effect is not ideal.
In a first aspect, an embodiment of the present invention provides a touch display device, including:
a first substrate;
a second substrate disposed opposite to the first substrate;
the first pressure sensing electrode is arranged on one side of the first substrate, which is far away from the second substrate;
the second pressure sensing electrode is arranged on one side, close to the second substrate, of the first pressure sensing electrode;
the third pressure sensing electrode is arranged on one side, far away from the first pressure sensing electrode, of the second pressure sensing electrode;
a capacitance value between the second pressure sensing electrode and the first pressure sensing electrode is a first capacitance; a capacitance value between the second pressure sensing electrode and the third pressure sensing electrode is a second capacitance; and in a pressure touch detection stage of the touch detection stage, determining a pressure value applied to the pressure touch detection stage by detecting the capacitance variation of the first capacitor and the capacitance variation of the second capacitor.
In a second aspect, an embodiment of the present invention further provides a display device, including the touch display apparatus in the first aspect.
In the touch display device and the display apparatus provided by the embodiment of the invention, the first pressure sensing electrode is arranged on one side of the first substrate far away from the second substrate, a second pressure sensing electrode is arranged on one side of the first pressure sensing electrode close to the second substrate, a third pressure sensing electrode is arranged on one side of the second pressure sensing electrode far away from the first pressure sensing electrode, the capacitance value between the second pressure sensing electrode and the first pressure sensing electrode is a first capacitance, the capacitance value between the second pressure sensing electrode and the third pressure sensing electrode is a second capacitance, the pressure value that pressure touch-control detection stage received is confirmed through the capacitance value variation volume that detects first electric capacity and the capacitance value variation volume of second electric capacity, and the pressure value detects sensitively, promotes display device's pressure and feels the testing performance, solves the unsatisfactory technical problem of pressure sense detection effect among the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a touch display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another touch display device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a black matrix layer and a metal grid electrode according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a driving circuit providing pressure detection signals to a plurality of second pressure sensing sub-electrodes through second touch traces according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another touch display device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another touch display device according to an embodiment of the present invention;
fig. 7a is a schematic structural diagram of the first pressure sensing electrode not being touched in the touch position detection according to the embodiment of the invention;
fig. 7b is a schematic structural diagram of a touch of the first pressure sensing electrode in the touch position detection according to the embodiment of the invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a touch display device according to an embodiment of the present invention, and as shown in fig. 1, the touch display device according to the embodiment of the present invention may include:
a first substrate 10;
a second substrate 20 disposed opposite to the first substrate 10;
a first pressure sensing electrode 31 disposed on a side of the first substrate 10 away from the second substrate 20;
a second pressure sensing electrode 32 disposed on a side of the first pressure sensing electrode 31 close to the second substrate 20;
a third pressure sensing electrode 33 disposed on a side of the second pressure sensing electrode 32 away from the first pressure sensing electrode 31;
the capacitance between the second pressure sensing electrode 32 and the first pressure sensing electrode 31 is the first capacitance C1(ii) a The capacitance between the second pressure sensing electrode 32 and the third pressure sensing electrode 33 is the second capacitance C2(ii) a In the pressure touch detection stage of the touch detection stage, the first capacitor C is detected1The capacitance variation and the second capacitance C2The pressure value received in the pressure touch detection stage is determined according to the capacitance value variation.
Referring to fig. 1, the second pressure sensing electrode 32 is disposed on a side of the first pressure sensing electrode 31 close to the second substrate 20, the second pressure sensing electrode 32 may be disposed on a side of the first substrate 10 close to the second substrate 20, the second pressure sensing electrode 32 may be disposed on a side of the second substrate 20 close to the first substrate 10, and fig. 1 illustrates an example in which the second pressure sensing electrode 32 is disposed on a side of the second substrate 20 close to the first substrate 10. The third pressure sensing electrode 33 is disposed on a side of the second pressure sensing electrode 32 away from the first pressure sensing electrode 33, the third pressure sensing electrode 33 may be disposed on a side of the second substrate 20 close to the first substrate 10, or disposed on a side of the second substrate 20 away from the first substrate 10, and fig. 1 illustrates an example in which the third pressure sensing electrodes 33 are disposed on a side of the second substrate 20 away from the first substrate 10.
As shown in fig. 1, the first pressure sensing electrode 31 is disposed on the first substrate 10 at a side far from the second substrate 20, the second pressure sensing electrode 32 is disposed on the first pressure sensing electrode 31 at a side near the second substrate 20, and the second pressure sensing electrode 3 is disposed on the second substrate 202 and the first pressure sensing electrode 31 form a first capacitance C1. As shown in fig. 1, there is an overlapping region between the perpendicular projection of the first pressure sensing electrode 31 on the plane of the second substrate 20 and the perpendicular projection of the second pressure sensing electrode 32 on the plane of the second substrate 20, so that a first capacitance C can be formed between the first pressure sensing electrode 31 and the second pressure sensing electrode 321. Alternatively, a vertical projection of the first pressure sensing electrode 31 on the plane of the second substrate 20 may completely overlap a vertical projection of the second pressure sensing electrode 32 on the plane of the second substrate 20, so as to ensure a first capacitance C between the first pressure sensing electrode 31 and the second pressure sensing electrode 321Has a large capacitance value.
The third pressure sensing electrode 33 is disposed on a side of the second pressure sensing electrode 32 away from the first pressure sensing electrode 31, and the second pressure sensing electrode 32 and the third pressure sensing electrode 33 form a second capacitance C2. As shown in fig. 1, there is an overlapping region between the vertical projection of the second pressure sensing electrode 32 on the plane of the second substrate 20 and the vertical projection of the third pressure sensing electrode 33 on the plane of the second substrate 20, so that a second capacitance C can be formed between the second pressure sensing electrode 32 and the third pressure sensing electrode 332. Optionally, the vertical projection of the second pressure sensing electrode 32 on the plane of the second substrate 20 is completely located within the vertical projection of the third pressure sensing electrode 33 on the plane of the second substrate 20, so as to ensure the second capacitance C between the second pressure sensing electrode 32 and the third pressure sensing electrode 332Has a large capacitance value.
In the pressure touch detection stage, the first capacitance C between the second pressure sensing electrode 32 and the first pressure sensing electrode 31 is passed1And a second capacitance C between the second pressure-sensing electrode 32 and the third pressure-sensing electrode 332The variable quantity of the capacitance value is used for jointly detecting the size of the touch pressure, and the touch pressure detection sensitivity is high. Specifically, when the touch display device includes only two pressure sensing electrodes, such as the first pressure sensing electrode 31 and the third pressure sensing electrode 33, the first pressure sensing electrodeThe distance between the electrode 31 and the third pressure sensing electrode 33 is d, the facing area is S, and the capacitance C between the first pressure sensing electrode 31 and the third pressure sensing electrode 33 is S/d; when the touch display device includes three pressure sensing electrodes, such as the first pressure sensing electrode 31, the second pressure sensing electrode 32 and the third pressure sensing electrode 33, a distance between the first pressure sensing electrode 31 and the second pressure sensing electrode is d1The facing area is S1Capacitance C between the first pressure sensing electrode 31 and the second pressure sensing electrode 321＝S1/d1(ii) a The distance between the second pressure sensing electrode 32 and the third pressure sensing electrode 33 is d2The facing area is S2Capacitance C between the second pressure sensing electrode 32 and the third pressure sensing electrode 332＝S2/d2. Because S is S1＝S2，d＝d1+d2Thus C1+C2＝S1/d1+S2/d2＝S(d1+d2)/d1*d2，C＝S/d，C1+C2>C, therefore, through the first capacitance C1And the variation of the capacitance value of the second capacitor C2The touch pressure detection sensitivity is higher than that of the touch pressure detection only by the variation of the capacitance between the first pressure sensing electrode 31 and the third pressure sensing electrode 33.
Optionally, the first pressure sensing electrode 31 is disposed on a side of the first substrate 10 away from the second substrate 20, and in the non-touch detection stage, the first pressure sensing electrode 31 may also be used to shield and protect the touch display device. Specifically, in the non-touch detection stage, the first pressure sensing electrode 31 may be used to shield static electricity generated during the production or use of the touch display device, so as to prevent the touch display device from being damaged by the static electricity.
Optionally, the first pressure sensing electrode 31 is disposed on a side of the first substrate 10 away from the second substrate 20, and the first touch trace of the first pressure sensing electrode 31 is also disposed on the first substrate 10; the second pressure sensing electrode 32 is disposed on one side of the first pressure sensing electrode 31 close to the second substrate 20, and the second touch traces of the second pressure sensing electrode 32 are disposed on the second substrate 20, so that the first touch traces and the second touch traces do not interfere with each other, and the first touch traces do not interfere with the second pressure sensing electrode 32.
Optionally, in the pressure touch detection stage, the second pressure sensing electrode 32 is applied with a pressure detection signal, the first pressure sensing electrode 31 is applied with a first constant reference signal, and the third pressure sensing electrode 33 is applied with a second constant reference signal. The pressure detection signal can be a rectangular wave signal or a sine wave signal, and the waveform of the pressure detection signal is not limited in the embodiment of the invention; the first constant reference signal may be a reference signal with a constant voltage value, for example, a reference signal with a voltage value of 2V, or may be a ground signal; the second constant reference signal may also be a reference signal with a constant voltage value, for example, a reference signal with a voltage value of 2V, or may also be a ground signal. Optionally, the first constant reference signal and the second constant reference signal may be the same or different, and are not limited herein, and specific values of the first constant reference signal and the second constant reference signal may be set according to an actual product design. Specifically, in the pressure touch detection stage, the second pressure sensing electrode 32 is applied with a pressure detection signal, the first pressure sensing electrode 31 is applied with a first constant reference signal, the third pressure sensing electrode 33 is applied with a second constant reference signal, and the second pressure sensing electrode 32 can output the pressure detection signal. The capacitance between the second pressure sensing electrode 32 and the first pressure sensing electrode is the first capacitance C1The capacitance between the second pressure sensing electrode 32 and the third pressure sensing electrode 33 is the second capacitance C2When the touch display device is touched by pressure, the first capacitor C1And a second capacitor C2The change occurs, and therefore, the pressure detection signal output from the second pressure sensing electrode 32 and the pressure sensing signal applied to the second pressure sensing electrode 32 are changed, and the magnitude of the pressure value is detected by detecting the change between the two pressure sensing signals.
Fig. 2 is a schematic structural diagram of another touch display device according to an embodiment of the present invention, and as shown in fig. 2, the touch display device according to the embodiment of the present invention may include:
a first substrate 10;
a second substrate 20 disposed opposite to the first substrate 10;
the first pressure sensing electrode 31 is disposed on a side of the first substrate 10 away from the second substrate 20, and the first pressure sensing electrode 31 includes a plurality of block-shaped first pressure sensing sub-electrodes 311;
the second pressure sensing electrode 32 is disposed on one side of the first pressure sensing electrode 31 close to the second substrate 20, the second pressure sensing electrode 32 includes a plurality of block-shaped second pressure sensing sub-electrodes 321, and the second pressure sensing sub-electrodes 321 are disposed corresponding to each of the first pressure sensing sub-electrodes 311;
a third pressure sensing electrode 33 disposed on a side of the second pressure sensing electrode 32 away from the first pressure sensing electrode 31;
the capacitance between the second pressure sensing sub-electrode 321 and the first pressure sensing sub-electrode 311 is the fourth capacitance C4The capacitance between the second pressure sensing sub-electrode 321 and the third pressure sensing electrode 33 is the fifth capacitance C5Detecting the fourth capacitor C in the pressure touch detection stage of the touch detection stage4The capacitance variation and the fifth capacitance C5The pressure value received in the pressure touch detection stage is determined according to the capacitance value variation.
As shown in fig. 2, the first pressure sensing electrode 31 may include a plurality of block-shaped first pressure sensing sub-electrodes 311, and the plurality of block-shaped first pressure sensing sub-electrodes 311 may be arranged in a matrix on a side of the first substrate 10 away from the second substrate 20; the second pressure sensing electrode 32 may include a plurality of block-shaped second pressure sensing sub-electrodes 321, and the plurality of block-shaped second pressure sensing sub-electrodes 321 may also be arranged in a matrix on a side of the first pressure sensing electrode 31 close to the second substrate 20. Optionally, each of the first pressure sensing sub-electrodes 311 is disposed corresponding to each of the second pressure sensing sub-electrodes 321, specifically, a vertical projection of one of the first pressure sensing sub-electrodes 311 on the plane of the second substrate 20 may overlap a vertical projection of one of the second pressure sensing sub-electrodes 321 on the plane of the second substrate 20, and optionally, a vertical projection of one of the first pressure sensing sub-electrodes 311 on the plane of the second substrate 20 may completely overlap a vertical projection of one of the second pressure sensing sub-electrodes 321 on the plane of the second substrate 20, so that a capacitance between the second pressure sensing sub-electrode 321 and the first pressure sensing sub-electrode 311 may have a larger capacitance value.
Optionally, a capacitance value between the second pressure-sensing sub-electrode 321 and the corresponding first pressure-sensing sub-electrode 311 is a fourth capacitance C4The capacitance between the second pressure sensing sub-electrode 321 and the third pressure sensing sub-electrode 33 is the fifth capacitance C5. In the pressure touch detection stage, a pressure detection signal may be applied to the second pressure sensing sub-electrode 321, a first constant reference signal is applied to the first pressure sensing sub-electrode 311, a second constant reference signal is applied to the third pressure sensing sub-electrode 33, and a pressure detection signal is output from the second pressure sensing sub-electrode 3214And a fifth capacitance C5The change occurs, and therefore, the pressure detection signal output from the second pressure sensing sub-electrode 321 and the pressure sensing signal applied to the second pressure sensing sub-electrode 321 change, and the magnitude of the pressure value is detected by detecting the change between the two pressure sensing signals. Moreover, the first pressure sensing electrode 31 includes a plurality of block-shaped first pressure sensing sub-electrodes 311, and the second pressure sensing electrode 32 includes a plurality of block-shaped second pressure sensing sub-electrodes 321, so that in the pressure touch detection stage, by detecting which one of the first pressure sub-electrodes 311 is subjected to pressure touch, the pressure detection structure is more accurate.
Alternatively, the second pressure sensing electrode 32 may include a metal oxide electrode or a metal mesh electrode, and when the second pressure sensing electrode 32 is a metal oxide electrode, it may be an indium tin oxide electrode; when the second pressure sensing electrode is a metal mesh electrode, it may be a copper mesh electrode.
Referring to fig. 3, when the second pressure sensing electrode 32 is a metal mesh electrode, the touch display device may further include a black matrix layer 40, the black matrix layer 40 may be disposed on the first substrate 10 or the second substrate 20, and fig. 3 illustrates an example in which the black matrix layer 40 is disposed on a side of the first substrate 10 facing the second substrate 20. Optionally, when the second pressure sensing electrode 32 is a metal grid electrode, a vertical projection of metal grid lines of the metal grid electrode on a plane where the black matrix layer 40 is located in the black matrix layer 40. Optionally, a vertical projection of the metal grid lines of the metal grid electrode on the plane where the black matrix layer 40 is located in the black matrix layer 40, and a distance between two adjacent metal grid lines may be equal to a distance between two adjacent black matrix grid lines in the black matrix layer 40, as shown in fig. 3; it is also possible that the distance between two adjacent metal mesh lines is an integral multiple of the distance between two adjacent black matrix mesh lines in the black matrix layer 40. Thus, the black matrix layer 40 can completely cover the metal grid electrode, the aperture opening ratio of the touch display device is not affected, and the aperture opening ratio of the touch display device is ensured to be larger.
Optionally, the touch display device may further include a driving circuit, and in the pressure touch detection stage, the driving circuit provides a first constant reference signal to the first pressure sensing electrode 31 through the first touch trace, provides a pressure detection signal to the second pressure sensing electrode 32 through the second touch trace, and provides a second constant reference signal (not shown in the figure) to the third pressure sensing electrode 33 through the third touch trace, respectively.
Referring to fig. 4, fig. 4 is a schematic structural diagram illustrating a driving circuit providing pressure detection signals to a plurality of second pressure sensing sub-electrodes through second touch traces according to an embodiment of the present invention, as shown in fig. 4, a plurality of block-shaped second pressure sensing sub-electrodes 321 may be arranged in a matrix, and fig. 4 illustrates an exemplary case where the second pressure sensing sub-electrodes 321 are arranged in three rows and three columns. Since the driving circuit 50 provides the pressure detection signal to the plurality of second pressure sensing sub-electrodes 321 through the second touch trace 62, the three second pressure sensing sub-electrodes 321 in the first row are farther from the driving circuit 50, and the first pressure sensing sub-electrodes 321 corresponding to the second pressure sensing sub-electrodes 321 in the first row are farther from the driving circuit 50The extending length of the second touch trace 62 is longer, and because there is a resistance on the second touch trace 62, the pressure detection signal has a larger signal loss on the longer second touch trace 62, so that the portion of the second pressure sensing sub-electrode 321 that is farther from the driving circuit 50 has a smaller resistance, and the portion of the second pressure sensing sub-electrode 321 that is closer to the driving circuit 50 has a larger resistance. Since the second pressure sensing sub-electrodes 321 may include metal oxide electrodes or metal mesh electrodes, when the second pressure sensing sub-electrodes 321 are metal oxide electrodes, metal oxides with different materials may be selected according to the distance between the second pressure sensing sub-electrodes 321 and the driving circuit, for example, the resistivity of the three second pressure sensing sub-electrodes 321 of the first row is selected to be ρ1Of the second row of three second pressure sensing sub-electrodes 321 with a resistivity p2Of the third row of three second pressure sensing sub-electrodes 321 with a resistivity p3The greater the resistivity of the metal oxide(s), the greater the resistance, and therefore ρ1<ρ2<ρ3. When the second pressure sensing sub-electrode 321 is a metal mesh electrode, metal mesh electrodes with different mesh densities may be selected according to the distance between the second pressure sensing sub-electrode 321 and the driving circuit, for example, the density of the three second pressure sensing sub-electrodes 321 in the first row is selected to be p1The second row of three second pressure sensing sub-electrodes 321 is selected to have a density p2The third row of three second pressure sensing sub-electrodes 321 has a resistivity p selected3The greater the metal mesh density, the lower the corresponding resistance, and therefore, p1>p2>p3. Alternatively, when the second pressure sensing sub-electrode 321 is a metal mesh electrode, the series-parallel relationship between the metal meshes can be selected according to the distance between the second pressure sensing sub-electrode 321 and the driving circuit to ensure that the part of the second pressure sensing sub-electrode 321 farther away from the driving circuit 50 has a smaller resistance, and the part of the second pressure sensing sub-electrode 321 closer to the driving circuit 50 has a larger resistance, as shown in fig. 4, the second pressure sensing sub-electrode is used as the second pressure sensing sub-electrode321 is a metal mesh electrode, and a series-parallel relationship between the metal meshes is selected according to a distance between the second pressure sensing sub-electrode 321 and the driving circuit to ensure that a portion of the second pressure sensing sub-electrode 321 farther from the driving circuit 50 has a smaller resistance and a portion of the second pressure sensing sub-electrode 321 closer to the driving circuit 50 has a larger resistance, as shown in fig. 4, all the metal mesh electrodes of the three second pressure sensing sub-electrodes 321 in the first row are arranged in parallel, and that the three second pressure sensing sub-electrodes 321 in the first row have a first resistance R1(ii) a The metal grid electrodes of the three second pressure sensing sub-electrodes 321 arranged in the second row are partially connected in series and partially connected in parallel, so as to ensure that the three second pressure sensing sub-electrodes 321 arranged in the second row have the second resistance R2(ii) a The metal grid electrodes of the third row of three second pressure sensing sub-electrodes 321 are all connected in series, so as to ensure that the third row of three second pressure sensing sub-electrodes 321 has the third resistor R3Wherein R is1<R2<R3The second pressure sensing sub-electrodes 321 at different positions can receive the same or similar pressure detection signals, so as to ensure accurate pressure detection in the pressure touch detection stage.
Optionally, the touch display device may further include a display panel, where the display panel may be a liquid crystal display panel or an organic light emitting diode display panel, and when the display panel is a liquid crystal display panel, the first substrate 10 may be a color film substrate, and the second substrate 20 may be an array substrate; when the display panel is an organic light emitting diode display panel, the first substrate 10 may be a package cover plate, and the second substrate 20 may be an array substrate.
Referring to fig. 5, when the display panel is a liquid crystal display panel, the touch display device may further include a backlight module 70, the backlight module 70 is disposed on a side of the second substrate 20 away from the first substrate 10, and the backlight module 70 is used for providing a light source for the liquid crystal display panel.
For example, as shown in fig. 5, the backlight module 70 may include a metal back plate 701 and an optical film 702 disposed on the metal back plate 701 near a side of the first substrate 10. Since the backlight module 70 includes the metal back plate 701, the third pressure sensing electrode 33 in the touch display device can be the metal back plate 701 in the backlight module 70, the metal back plate 701 in the backlight module 70 is reused as the third pressure sensing electrode 33 in the touch display device, the third pressure sensing electrode 33 is simple in arrangement, and meanwhile, the film arrangement in the touch display device can be reduced, so that the thin design requirement of the touch display device is met.
Alternatively, when the display panel is an organic light emitting diode display panel, the third pressure sensing electrode 33 may be disposed on a side of the second pressure sensing unit 32 away from the first pressure sensing electrode 31 as a separate electrode.
Optionally, fig. 6 is a schematic structural diagram of another touch display device according to an embodiment of the present invention, the touch display device shown in fig. 6 may further include a polarizer 80 on the basis of the touch display device described in the above embodiment, as shown in fig. 6, the polarizer 80 is disposed on a side of the second substrate 20 away from the first substrate 10 through a conductive adhesive 801, and optionally, the second pressure sensing electrode 32 may be a light-shielding adhesive 801. In summary, the light-shielding glue 801 connecting the second substrate 20 and the light-shielding sheet 80 is reused as the second pressure sensing electrode 32, the second pressure sensing electrode 32 is simple in arrangement, and meanwhile, the film arrangement in the touch display device can be reduced, thereby ensuring the thin design requirement of the touch display device.
Optionally, the touch detection stage according to the embodiment of the present invention may further include a touch position detection stage, in which the capacitance between the first pressure sensing electrode 31 and the second pressure sensing electrode 32 is a third capacitance C3And determining the touch position by detecting the capacitance variation of the third capacitor.
Exemplarily, as shown in fig. 7a and 7b, in the touch position detecting stage, only the third capacitance C between the first pressure sensing electrode 31 and the second pressure sensing electrode 32 is passed3The touch position can be determined by the variation of the capacitance, for example, before the touch position is detected, the capacitance between the first pressure sensing electrode 31 and the second pressure sensing electrode 32 is C3After touch has taken place, e.g. finger contactWhen the display device is touched, the capacitance between the first pressure sensing electrode 31 and the second pressure sensing electrode 32 is C3', determine | C3-C3’|≥C0Is a touch position, wherein C0And detecting the identified touch report threshold value for the touch position.
Optionally, in the touch position detection stage, a third constant reference signal is applied to the second pressure sensing electrode 32, where the third constant reference signal may be a reference signal with a constant voltage value, for example, a reference signal with a voltage value of 2V, or may be a ground signal.
Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 8, a display device 100 may include a display device 101 according to any embodiment of the present invention. The display device 100 may be a mobile phone shown in fig. 8, or may be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A touch display device, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
the first pressure sensing electrode is arranged on one side of the first substrate, which is far away from the second substrate, and a first touch wire of the first pressure sensing electrode is arranged on the first substrate;
the second pressure sensing electrode is arranged on one side, close to the second substrate, of the first pressure sensing electrode, one side, close to the second substrate, of the first pressure sensing electrode is one side, close to the first substrate, of the second substrate, and a second touch wire of the second pressure sensing electrode is arranged on the second substrate;
the third pressure sensing electrode is arranged on one side, far away from the first pressure sensing electrode, of the second pressure sensing electrode;
a capacitance value between the second pressure sensing electrode and the first pressure sensing electrode is a first capacitance; a capacitance value between the second pressure sensing electrode and the third pressure sensing electrode is a second capacitance; in a pressure touch detection stage of the touch detection stage, determining a pressure value applied to the pressure touch detection stage by detecting capacitance variation of the first capacitor and capacitance variation of the second capacitor;
the touch detection stage comprises a touch position detection stage; in the touch position detection stage, a capacitance value between the first pressure sensing electrode and the second pressure sensing electrode is a third capacitance, and a touch position is determined by detecting a capacitance value change of the third capacitance; in the touch position detection stage, a third constant reference signal is applied to the second pressure sensing electrode;
the touch display device further comprises a backlight module; the third pressure sensing electrode is a metal back plate of the backlight module;
the first pressure sensing electrode comprises a plurality of block-shaped first pressure sensing sub-electrodes, the second pressure sensing electrode comprises a plurality of block-shaped second pressure sensing sub-electrodes, and each second pressure sensing sub-electrode is arranged corresponding to each first pressure sensing electrode;
the second pressure-sensing sub-electrode comprises a transparent metal oxide electrode or a metal grid electrode; when the second pressure sensing sub-electrode is a transparent metal oxide electrode, the resistivity of the material of the second pressure sensing sub-electrode close to one side of the driving circuit is larger than that of the material of the second pressure sensing sub-electrode far away from one side of the driving circuit.
2. The touch display device according to claim 1, wherein in the pressure touch detection stage, a pressure detection signal is applied to the second pressure sensing electrode; a first constant reference signal is applied to the first pressure sensing electrode, and a second constant reference signal is applied to the third pressure sensing electrode.
3. The touch display device of claim 2, wherein the first constant reference signal and the second constant reference signal are ground signals.
4. The touch display device of claim 1, wherein when the second pressure sensing sub-electrode is a metal mesh electrode, a resistance value of the second pressure sensing sub-electrode near the driving circuit is greater than a resistance value of the second pressure sensing sub-electrode far from the driving circuit.
5. The touch display device of claim 1, further comprising a display panel comprising a liquid crystal display panel or an organic light emitting diode display panel.
6. The touch display device of claim 1, further comprising a black matrix layer;
when the second pressure sensing electrode is a metal grid electrode, the vertical projection of the metal grid lines of the metal grid electrode on the plane of the black matrix is positioned in the black matrix layer.
7. The touch display device of claim 1, wherein the third constant reference signal is a ground signal.
8. A display device comprising the touch display device according to any one of claims 1 to 7.
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| CN108932078B (en) * | 2018-06-22 | 2023-04-11 | 京东方科技集团股份有限公司 | Touch panel, manufacturing method thereof and electronic device |
| CN108920007B (en) * | 2018-07-20 | 2021-03-12 | 京东方科技集团股份有限公司 | Touch reporting threshold setting method and system |
| CN109683737B (en) | 2018-11-23 | 2021-02-26 | 京东方科技集团股份有限公司 | Touch substrate, display substrate and display panel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293749A (en) * | 2012-09-26 | 2013-09-11 | 上海天马微电子有限公司 | Built-in liquid crystal touch control screen and color film base plate thereof |
| CN104681645A (en) * | 2015-01-23 | 2015-06-03 | 华南师范大学 | Method for preparing composite transparent conductive electrode based on metal grid and metal nano-wire |
| CN106054433A (en) * | 2016-08-11 | 2016-10-26 | 厦门天马微电子有限公司 | Display panel and driving method thereof, and display unit with display panel |
| CN106066740A (en) * | 2016-08-02 | 2016-11-02 | 厦门天马微电子有限公司 | Touch-control display panel and touch control display apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI375166B (en) * | 2008-07-15 | 2012-10-21 | Tpo Displays Corp | Systems for displaying images |
| US9606688B2 (en) * | 2014-05-28 | 2017-03-28 | Samsung Electro-Mechanics Co., Ltd. | Touch sensing apparatus and touchscreen apparatus including the same |
-
2017
- 2017-05-27 CN CN201710396251.XA patent/CN107203299B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293749A (en) * | 2012-09-26 | 2013-09-11 | 上海天马微电子有限公司 | Built-in liquid crystal touch control screen and color film base plate thereof |
| CN104681645A (en) * | 2015-01-23 | 2015-06-03 | 华南师范大学 | Method for preparing composite transparent conductive electrode based on metal grid and metal nano-wire |
| CN106066740A (en) * | 2016-08-02 | 2016-11-02 | 厦门天马微电子有限公司 | Touch-control display panel and touch control display apparatus |
| CN106054433A (en) * | 2016-08-11 | 2016-10-26 | 厦门天马微电子有限公司 | Display panel and driving method thereof, and display unit with display panel |
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