CN107131982B - Touch pressure detection method of touch panel - Google Patents
Touch pressure detection method of touch panel Download PDFInfo
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- CN107131982B CN107131982B CN201710333300.5A CN201710333300A CN107131982B CN 107131982 B CN107131982 B CN 107131982B CN 201710333300 A CN201710333300 A CN 201710333300A CN 107131982 B CN107131982 B CN 107131982B
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 230000001939 inductive effect Effects 0.000 claims description 47
- 239000004065 semiconductor Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 13
- 238000011161 development Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 239000002210 silicon-based material Substances 0.000 claims description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 13
- 230000002123 temporal effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
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- 235000008434 ginseng Nutrition 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
- G01L5/167—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using piezoelectric means
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
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Abstract
The embodiment of the invention discloses a touch pressure detection method of a touch panel. The touch pressure detection method comprises the following steps: acquiring touch feedback strength S of different touch pressure values F of the pressure sensor at different touch positions r of the touch panel; according to the touch feedback strength S, a touch position r of the touch panel and an input detection value U of the pressure sensor are constructed0The corresponding relationship of (a); inputting a detection value U along with the increase of the touch feedback strength S0Decrease; acquiring a current touch position r; according to the touch position r of the touch panel and the input detection value U of the pressure sensor0Determining the input detection value U of the pressure sensor0And transmitted to the corresponding pressure sensor; obtaining the input detection value U of the pressure sensor0A temporal output detection value U; determining the current touch position r according to the output detection value UAnd (6) processing the touch pressure value F. The touch pressure detection method provided by the embodiment of the invention can be used for improving the sensitivity of touch pressure detection.
Description
Technical field
The present embodiments relate to the touch-control pressure detecting sides of touch-control pressure sensing technologies more particularly to a kind of touch panel
Method.
Background technique
Currently, as a kind of information input tool to be widely used in mobile phone, tablet computer, public place big for touch panel
In the electronic equipments such as the information enquiry machine in the Room.In this way, the mark that user need to be only touched with finger on the electronic equipment can be real
Now to the operation of the electronic equipment, dependence of the user to other input equipments (such as keyboard and mouse) is eliminated, man-machine friendship is made
It is mutually more simple.
In order to preferably meet user demand, when setting touches touch panel for detecting user usually in touch panel
The pressure sensor of touch-control pressure size, to enrich the application range of touch technology.But current electronic equipment pursues narrow frame
Change, such as touch control display apparatus, the wiring space in the non-display area of touch-control display panel for display is very limited, less
The excessive pressure sensor of possible layout, this meeting is so that the pressing that pressure sensor can sense is limited in scope, away from pressure biography
The sensitivity of sensor remote position, pressure sensor is lower, so that the pressure detecting performance of touch panel is bad.
Summary of the invention
The present invention provides a kind of touch-control pressure detection method, to realize the sensitivity for improving touch panel touch-control pressure detecting
Purpose.
The embodiment of the invention provides a kind of touch-control pressure detection method of touch panel, the touch panel edge setting
There is at least one pressure sensor；
The touch-control pressure detecting side includes:
The pressure sensor is obtained at the different position of touch r of the touch panel by different touch-control pressure value F
Touch-control feedback intensity S；
According to the touch-control feedback intensity S, the defeated of the position of touch r of the touch panel and the pressure sensor is constructed
Enter detected value U0Corresponding relationship；With the increase of the touch-control feedback intensity S, the input detected value U0Reduce；
Obtain current position of touch r；
According to the input detected value U of the position of touch r of the touch panel and the pressure sensor0Corresponding close
System, determines the input detected value U of the pressure sensor0, and it is transmitted to the corresponding pressure sensor；
It obtains the pressure sensor and is inputting the input detected value U0When output detection value U；
According to the output detection value U, touch-control pressure value F at presently described position of touch r is determined.
The embodiment of the present invention is by, according to touch-control feedback intensity S, constructing the position of touch r and pressure of touch panel before pressing
The input detected value U of force snesor0Corresponding relationship；With the increase of touch-control feedback intensity S, detected value U is inputted0Reduce.It is pressing
According to the input detected value U of the position of touch r of touch panel and pressure sensor after pressure0Corresponding relationship, determine pressure sensing
The input detected value U of device0, and it is transmitted to corresponding pressure sensor, solve existing touch panel touch-control pressure detecting
Sensitivity is not high, and the biggish problem of touch-control pressure detecting process power consumption, realizes the spirit for improving touch panel touch-control pressure detecting
Sensitivity, while reducing the effect of power consumption.
Detailed description of the invention
Fig. 1 a is a kind of structural schematic diagram of touch panel provided in an embodiment of the present invention；
Fig. 1 b is the structural schematic diagram of another touch panel provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the touch-control pressure detection method of touch panel provided in an embodiment of the present invention；
Fig. 3 a is reference input detected value U0' be equal to 3.3V when, full frame pressing is carried out to the tangible area of the touch panel 10
Test, the tangible 10 position Δ U distribution schematic diagram of area of the touch panel；
Fig. 3 b is reference input detected value U0' when being equal to 10V, full frame pressing survey is carried out to the tangible area of the touch panel 10
Examination, the tangible 10 position Δ U distribution schematic diagram of area of the touch panel；
Fig. 4 is the structural schematic diagram of another touch panel provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of pressure sensor provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another touch panel provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another pressure sensor provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 a is a kind of structural schematic diagram of touch panel provided in an embodiment of the present invention.Referring to Fig. 1 a, in the touch surface
Edges of boards edge is provided at least one pressure sensor 20 (4 pressure sensors 20 are illustratively provided in Fig. 1 a).The touch-control
Panel includes at least one flat surfaces and the four edges line around the flat surfaces.The touch panel edge be provided with to
A few pressure sensor 20 refers specifically to, and is provided at least one pressure at the position of four edges line on the flat surfaces
Sensor 20.
It should be noted that definition is touched for main body for touch (such as finger), to determine touch information (including touch-control
Location information and/or touch-control pressure information) region be tangible area 10, then as shown in Figure 1a, which can be all over
And the entire flat surfaces of touch panel；Alternatively, as shown in Figure 1 b, which can also be only arranged at touch panel
Part flat surfaces.
In Fig. 1 a and Fig. 1 b, the shape of the flat surfaces is rectangle, this is only a specific example of the invention, and
Non- limitation of the present invention.In actual setting, the shape that can according to the design needs, be arranged the flat surfaces is square,
Round or triangle etc..It should be noted that the shape of the flat surfaces is different, around the sideline of the flat surfaces item number and
Shape may also be different, and this is not restricted.
Fig. 2 is a kind of process for the touch-control pressure detection method for being directed to above-mentioned touch panel provided in an embodiment of the present invention
Figure.Referring to fig. 2, which includes:
S110, pressure sensor 20 is obtained at the different position of touch r of touch panel by different touch-control pressure value F's
Touch-control feedback intensity S.
The essence of this step is to determine that the one-to-one correspondence of position of touch r, touch-control pressure value F and touch-control feedback intensity S close
System.Here, position of touch r, specific pressing position coordinate when referring to using the touch-control pressure pressing touch panel that size is F.
When touch-control feedback intensity S is a certain position r for the touch-control pressure pressing touch panel for being F using size, 20 institute of pressure sensor
The deformation quantity for the touch panel experienced.Performance parameter, each pressure of the size of touch-control feedback intensity S by each pressure sensor 20
The many factors collective effects such as the hardness of the specific setting position of force snesor 20 and the tangible area 10 of touch panel.
At the actually any position of pressing touch panel, entire touch panel all can corresponding deformation occurs.Pressure sensing
The deformation situation that touch panel near position is arranged in device 20 will affect the deformation situation of the pressure sensor 20, and then influence the pressure
The value of electrical signals that force snesor 20 exports.Studies have shown that being input to 20 reference input detected value U of pressure sensor0' it is definite value
When, press touch panel, the big position of touch-control feedback intensity, the value of electrical signals and be input to pressure biography that pressure sensor 20 is fed back
The reference input detected value U of sensor 200' difference Δ U it is bigger.Therefore, in the reference input detection for being input to pressure sensor 20
Value U0' be definite value under the premise of, can use pressing after pressure sensor 20 feed back value of electrical signals and be input to pressure sensing
The reference input detected value U of device 200' difference Δ U characterize touch-control feedback intensity S.
There are many concrete methods of realizing of this step, for example, can be according to the performance parameter of each pressure sensor 20, respectively pressure
The information such as the hardness of the specific setting position of force snesor 20 and the tangible area 10 of touch panel, which calculate, to be obtained.Alternatively, to pressure
Force snesor 20 inputs the reference input detected value U for determining size0', using the touch-control pressure of multiple known dimensions, successively to touching
The control tangible area 10 of panel carries out full frame pressing, and detects the touch-control feedback intensity S of pressure sensor 20, so that it is determined that touch-control position
Set the one-to-one relationship of r, touch-control pressure value F and touch-control feedback intensity S.
Fig. 3 a is reference input detected value U0When '=3.3V, full frame pressing is carried out to the tangible area of the touch panel and is tested,
The tangible 10 position Δ U distribution schematic diagram of area of the touch panel.Fig. 3 b is reference input detected value U0When '=10V, to this
The tangible area of touch panel carries out full frame pressing test, the tangible area position Δ U distribution schematic diagram of the touch panel.Fig. 3 a
The size of Δ U, unit mV are indicated with the numerical value in Fig. 3 b.
Referring to Fig. 3 a and Fig. 3 b, tested by carrying out full frame pressing to the touch panel, it is found that for single pressure
Sensor 20 inputs same reference input detected value U0' in the case where, tangible area 10 is pressed for the touch-control pressure of F with size
When different location, the value of electrical signals that pressure sensor 20 is fed back after pressing is detected with the reference input for being input to pressure sensor 20
Value U0' difference Δ U it is of different sizes.Press the electricity that pressure sensor 20 is fed back behind the position of pressure sensor 20, pressing
Signal value and the reference input detected value U for being input to pressure sensor 200' difference Δ U it is bigger.Accordingly, it can be set with touching
The increase of the distance between position r and pressure sensor 20 is controlled, touch-control feedback intensity S reduces.Here it is arranged with position of touch r
The increase of the distance between pressure sensor 20, touch-control feedback intensity S reduces, substantially to touch-control position obtained in S110
Set a kind of correcting mode of the one-to-one relationship of r, touch-control pressure value F and touch-control feedback intensity S.The benefit being arranged in this way is,
May insure can be properly in the next steps position of touch according to the distance between position of touch r and pressure sensor 20
R selectes the input detected value U of pressure sensor 200, and then when ensuring to press position of touch r, what pressure sensor 20 was fed back
Value of electrical signals and the reference input detected value U for being input to pressure sensor 200' difference Δ U size it is appropriate, reach and both can guarantee touching
Panel touch-control pressure detecting sensitivity with higher is touched, while touch panel has the purpose of lower power consumption.
Studies have shown that user carries out the likelihood ratio of touch control operation at tangible 10 edge of area near touch panel central point
(position for closing on touch panel sideline) carries out big more of probability of touch control operation.Here the central point of touch panel refers to touch-control
The geometric center in the tangible area 10 of panel.Therefore, optionally, it is arranged between position of touch r and the central point of touch panel
Distance increase, touch-control feedback intensity S reduce.Similarly, the central point with position of touch r and touch panel is set here
The distance between increase, touch-control feedback intensity S reduce, substantially to position of touch r, touch-control pressure value obtained in S110
A kind of correcting mode of the one-to-one relationship of F and touch-control feedback intensity S.The benefit of such setting is, it can be ensured that rear
It can be properly the selected pressure of position of touch r according to the distance between central point of position of touch r and touch panel in continuous step
The input detected value U of force snesor 200, and then when ensuring to press position of touch r, value of electrical signals that pressure sensor 20 is fed back
With the reference input detected value U for being input to pressure sensor 200' difference Δ U size it is appropriate, reach both can guarantee touch panel have
There is higher touch-control pressure detecting sensitivity, while touch panel has the purpose of lower power consumption.
S120, according to touch-control feedback intensity S, the input for constructing the position of touch r and pressure sensor 20 of touch panel is examined
Measured value U0Corresponding relationship；With the increase of touch-control feedback intensity S, detected value U is inputted0Reduce.
With continued reference to Fig. 3 a and Fig. 3 b, the same position in the tangible area 10 of touch panel is pressed using the touch-control pressure of same size
It sets, different reference input detected value U0' under, pressure sensor 20 is fed back after pressing value of electrical signals and be input to pressure sensor
20 reference input detected value U0' difference Δ U it is of different sizes.If pressure sensor 20 is fed back after pressing value of electrical signals and input
Difference Δ U to the reference input detected value U0 ' of pressure sensor 20 is too small, and pressure sensor 20 is sensitive to touch-control pressure detecting
It spends not high.
Further, comparison diagram 3a and Fig. 3 b presses touch panel location A using the touch-control pressure of same size, works as ginseng
Examine input detected value U0When '=3.3V, pressure sensor 20 is fed back after pressing value of electrical signals and be input to pressure sensor 20
Reference input detected value U0' difference Δ U it is larger, be enough to calculate touch-control pressure according to Δ U, if enabling reference input at this time
Detected value U0When '=10V, the power consumption of touch panel will increase.And the touch-control pressure of same size is utilized to press touch panel B
It sets, as reference input detected value U0When '=3.3V, pressure sensor 20 is fed back after pressing value of electrical signals and be input to pressure biography
The reference input detected value U of sensor 200' difference Δ U it is too small, according to Δ U be unfavorable for accurately calculate touch-control pressure size, this
Shi Ruo is referring in addition to input detected value U0When '=10V, will increase pressing after pressure sensor 20 feed back value of electrical signals be input to
The reference input detected value U of pressure sensor 200' difference Δ U, be conducive in this way improve pressure detecting sensitivity.
Based on above content, the implementation method of this step is, according to touch-control feedback intensity S, to construct the touch-control of touch panel
The input detected value U of position r and pressure sensor 200Corresponding relationship, be that each pressure sensor 20 determines on touch panel
The detected value U of its required input0.Illustratively, position of touch r is remoter at a distance from pressure sensor 20, when pressing, the pressure
The input detected value U of sensor 200It is bigger.Alternatively, position of touch r is remoter at a distance from touch panel central point, when pressing,
The input detected value U of the pressure sensor 200It is bigger.
Typically, if touch panel edge is provided with two or more pressure sensors 20；Different pressures sensor
The 20 touch-control feedback intensity S at same position of touch r by identical touch-control pressure value F is different；And different pressures are sensed
Device 20, the position of touch r of touch panel and the input detected value U of pressure sensor 200Corresponding relationship it is different.It is arranged in this way
Benefit is, according to position of touch r at a distance from each pressure sensor 20, targetedly determines and inputs for each pressure sensor 20
Detected value U0, to ensure that each pressure sensor 20 can work under optimal working condition, so that touch panel has simultaneously
There are the sensitivity and lower power consumption of higher pressure detecting.
It should be noted that S110 and S120 can be executed before factory, and the position of touch that can will be determined in S110
R, the position of touch r and pressure determined in the one-to-one relationship and S120 of touch-control pressure value F and touch-control feedback intensity S is passed
The input detected value U of sensor 200Corresponding relationship be stored in registers.
S130, current position of touch r is obtained.
Here pressing position when current position of touch r refers to user's current press touch panel.
The implementation method of this step can there are many, such as can be according to the testing result meter of touch control electrode on touch panel
Calculation obtains position of touch r, can also be obtained according to other hardware or software program.Herein with no restriction.
Typically, if being calculated position of touch r according to the testing result of touch control electrode on touch panel, on touch panel
Touch control electrode can be self-tolerant touch control electrode, or mutual capacitance type touch control electrode.Illustratively, if touch control electrode is certainly
Appearance formula touch control electrode, optionally, as shown in figure 4, being provided with multiple self-tolerant touch control electrodes 13, the touch control electrode on touch panel
13 be block type electrode, each touch control electrode 13 corresponds to a determining coordinate position, and these touch control electrodes 13 are distinguished
Capacitor is constituted with ground.When finger touches the touch panel, the capacitor of finger will be added in the touch control electrode 13 of its touch,
The direct-to-ground capacitance for the touch control electrode 13 for touching it changes.Due to the reacting condition touch-control of the signal of each touch control electrode 13
The variation of 13 direct-to-ground capacitance of electrode.By detecting the signal intensity situation of each touch control electrode 13, which specific touch-control electricity determined
The signal of pole 13 changes, and then can determine finger according to the corresponding coordinate value of the changed touch control electrode 13 of signal
Touch location.
S140, according to the input detected value U of the position of touch r of touch panel and pressure sensor 200Corresponding relationship, really
The input detected value U of level pressure force snesor 200, and it is transmitted to corresponding pressure sensor 20.
The implementation method of this step can be to consult the position of touch r and pressure sensing of the touch panel determined in S130
The input detected value U of device 200Corresponding relationship, and then obtain the input of the corresponding each pressure sensor 20 of current position of touch r
Detected value U0Size, and by input detected value U0It is transmitted separately to corresponding pressure sensor 20.
S150, pressure sensor 20 is obtained in input input detected value U0When output detection value U.
The implementation method of this step can be to input input detected value U to each pressure sensor 200Afterwards, it detects respectively
The output detection value U of each pressure sensor 20.
S160, according to output detection value U, determine touch-control pressure value F at current position of touch r.
There are many concrete methods of realizing of this step.Such as: pressure sensor 20 is obtained in the different touch-controls of touch panel
While touch-control feedback intensity S at the r of position by different touch-control pressure value F, building touch-control feedback intensity S and touch-control pressure value
The functional relation S (F, r) of F and position of touch r.According to output detection value U, touch-control pressure value F at current position of touch r is determined,
It include: according to output detection value U and to be input to the input detected value U of pressure sensor 200, calculate change in detection signal amount Δ
U；According to change in detection signal amount Δ U and touch-control feedback intensity S and input detected value U0Functional relation Δ U (S, U0) and touching
The functional relation S (F, r) for controlling feedback intensity S and touch-control pressure value F and position of touch r is calculated at current position of touch r and touches
Pressure control force value F.
It should be noted that change in detection signal amount Δ U and touch-control feedback intensity S and input detected value U0Functional relation
Δ U (S, U0) acquisition modes there are many, such as can by being artificially arranged to obtain, can also touch panel factory before, it is right
The tangible area 10 of touch panel carries out full frame pressing test and obtains.
The embodiment of the present invention is by, according to touch-control feedback intensity S, constructing the position of touch r and pressure of touch panel before pressing
The input detected value U of force snesor 200Corresponding relationship；With the increase of touch-control feedback intensity S, detected value U is inputted0Reduce.?
According to the input detected value U of the position of touch r of touch panel and pressure sensor 20 after pressing0Corresponding relationship, determine pressure
The input detected value U of sensor 200, and it is transmitted to corresponding pressure sensor 20, solve existing touch panel touch-control pressure
The sensitivity of detection is not high, and the biggish problem of touch-control pressure detecting process power consumption, realizes and improves the inspection of touch panel touch-control pressure
The sensitivity of survey, while reducing the effect of power consumption.
Optionally, it is contemplated that, in practice in the case where touch-control pressure is not present, due to being connected with pressure sensor 20
Connecting wire, pressure sensor 20 etc. there are resistance so that the output detection value U of pressure sensor 20 and input detected value
U0And it is unequal, this meeting so that using pressure sensor 20 output detection value U and input detected value U0The detection being calculated
Change amount signal Δ U includes partial noise, reduces the sensitivity and accuracy of touch panel touch-control pressure detecting.Thus may be used
Selection of land, before obtaining current position of touch r, further includes: obtain pressure sensor 20 in no pressure touch-control, difference input inspection
Measured value U0Corresponding output bias U '；According to output detection value U, touch-control pressure value F at current position of touch r is determined, comprising:
According to the corresponding input detected value U of output detection value U and output detection value U0Obtained output bias U ' determines current touching
Control touch-control pressure value F at the r of position.The benefit being arranged in this way is to can be further improved the spirit of touch panel touch-control pressure detecting
Sensitivity and accuracy.
According to the corresponding input detected value U of output detection value U and output detection value U0Obtained output bias U ', really
At settled preceding position of touch r there are many concrete methods of realizing of touch-control pressure value F, optionally, according to output detection value U and defeated
Bias U ' out calculates change in detection signal amount Δ U；It is examined according to change in detection signal amount Δ U and touch-control feedback intensity S and input
Measured value U0Functional relation Δ U (S, U0) and touch-control feedback intensity S and touch-control pressure value F and position of touch r functional relation S
Touch-control pressure value F at current position of touch r is calculated in (F, r).
In above-mentioned technical side, the pressure sensor 20 on touch panel may include pressure sensitive bridge sensor or half
Conductor piezoresistance sensor etc..Herein with no restriction to the classification of pressure sensor 20.
Fig. 5 is a kind of structural schematic diagram of pressure sensor 20 provided in an embodiment of the present invention.Referring to Fig. 5, which is passed
Sensor 20 is pressure sensitive bridge sensor.The pressure sensor 20 includes the first inductive reactance R1, the second inductive reactance R2, the
Three inductive reactance R3 and the 4th inductive reactance R4；The pressure sensitive electric bridge 30 further includes that the first extending direction 100 and second extends
Direction 200, the first extending direction 100 and the second extending direction 200 are arranged in a crossed manner.
The first end a ' and the first power input of the first end a and the 4th inductive reactance R4 of first inductive reactance R1
Vin1 electrical connection, the first end b ' and the first inductive signal of the second end b of the first inductive reactance R1 and the second inductive reactance R2 are surveyed
Measure end Vout1 electrical connection, the first end d ' of the second end d and third inductive reactance R3 of the 4th inductive reactance R4 and the second induction
Signal measurement end Vout2 electrical connections, the second end c ' of the second end c and third inductive reactance R3 of the second inductive reactance R2 and the
Two power input Vin2 electrical connections.
First inductive reactance R1 is big by component of the development length of first end a to second end b on the first extending direction 100
In the component on the second extending direction 200, the second inductive reactance R2 is by the development length of first end b ' to second end c second
Component on extending direction 200 is greater than the component on the first extending direction 100, and third inductive reactance R3 is by first end d ' to the
The development length of two end c ' is greater than the component on the second extending direction 200, the 4th sense in the component on the first extending direction 100
It answers resistance R4 to be greater than by component of the development length of first end a ' to second end d on the second extending direction 200 to extend first
Component on direction 100.
First power input Vin1 and second source input terminal Vin2 to pressure sensitive bridge sensor for inputting
Detected value U0；First inductive signal measurement end VoutThe 1 and second inductive signal measurement end Vout2 from pressure sensitive electric bridge for sensing
The output detection value U of device output.
Setting can use the first inductive reactance R1 and third inductive reactance R3 and detect answering for the first extending direction 100 in this way
Become, the strain of the second extending direction 200 is detected using the second inductive reactance R2 and the 4th inductive reactance R4.Main body will be touched to exist
The pressure conversion applied on touch panel is the adaptability to changes along the first extending direction 100 and the second extending direction 200, realizes touch-control
Pressure detecting.
Defining the first extending direction 100 is principal strain directions.Further, it is contemplated that in actual setting be pressure sensitive
Bridge sensor principal strain directions is different from the angle in touch panel sideline nearest apart from pressure sensitive bridge sensor, touch-control
The specific location that check frequency occurs on panel is different.Here check frequency refers to, when to touch panel can Touch Zone carry out
When full frame pressing is tested, there are some regions, when pressing any position in the region, two detected, the pressure sensitive electric bridge
Strain difference very little on direction, even 0, so that the pressure sensitive electric bridge can not detect the size of the touch-control pressure in the area.
The region is the inspection blind area of the pressure sensitive electric bridge.Optionally, the principal strain directions of pressure sensitive bridge sensor is set
With apart from pressure sensitive bridge sensor it is nearest can the angle α in 10 sideline of Touch Zone be greater than or equal to 20 °, and be less than or equal to
70°.The benefit being arranged in this way is, it is possible to prevente effectively from occurring biggish touch-control blind area in touch panel.Further, such as Fig. 6
It is shown, be arranged the principal strain directions of pressure sensitive bridge sensor with apart from pressure sensitive bridge sensor it is nearest can Touch Zone
The size of the angle α in 10 sidelines is 45 °.The benefit being arranged in this way is can to reduce the touch-control in touch panel to the maximum extent
Blind area.
Fig. 7 is the structural schematic diagram of another pressure sensor 20 provided in an embodiment of the present invention.Referring to Fig. 7, the pressure
Sensor 20 is semiconductor pressure sensor 20.Semiconductor pressure sensor 20 is amorphous silicon material film or polycrystalline silicon material film；
Semiconductor pressure sensor 20 includes the first power input Vin1 and second source input terminal Vin2, it is used for semiconductor pressure
The input input of sensor 20 detected value U0, semiconductor pressure sensor 20 further includes the first inductive signal measurement end Vout1 and second
Inductive signal measurement end Vout2, for exporting output detection value U from semiconductor pressure sensor 20.
With continued reference to Fig. 7, which is quadrangle pressure sensor 20, the first power input
Vin1, second source input terminal Vin2, the first inductive signal measurement end VoutThe 1 and second inductive signal measurement end Vout2 respectively and half
Four sides of conductor pressure sensor 20 are connected.It is semiconductor that the pressure conversion that main body applies on touch panel, which will be touched,
Adaptability to changes on 20 place plane extending direction of pressure sensor realizes touch-control pressure detecting.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts, be combined with each other and substitutes without departing from protection scope of the present invention.Therefore, although by above embodiments to this
Invention is described in further detail, but the present invention is not limited to the above embodiments only, is not departing from present inventive concept
In the case of, it can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. a kind of touch-control pressure detection method of touch panel, which is characterized in that the touch panel edge is provided at least one
A pressure sensor；
Obtain touching of the pressure sensor at the different position of touch r of the touch panel by different touch-control pressure value F
Control feedback intensity S；
According to the touch-control feedback intensity S, the input for constructing the position of touch r and the pressure sensor of the touch panel is examined
Measured value U0Corresponding relationship；With the increase of the touch-control feedback intensity S, the input detected value U0Reduce；
Obtain current position of touch r；
According to the input detected value U of the position of touch r of the touch panel and the pressure sensor0Corresponding relationship, really
The input detected value U of the fixed pressure sensor0, and it is transmitted to the corresponding pressure sensor；
It obtains the pressure sensor and is inputting the input detected value U0When output detection value U；
According to the output detection value U, touch-control pressure value F at presently described position of touch r is determined；
It is described to obtain the pressure sensor at the different position of touch r of the touch panel by different touch-control pressure value F
Touch-control feedback intensity S while, construct the functional relation of the touch-control feedback intensity S and touch-control pressure value F and position of touch r
S (F, r)；
It is described according to the output detection value U, determine touch-control pressure value F at presently described position of touch r, comprising:
According to the output detection value U and it is input to the input detected value U of the pressure sensor0, calculate detection signal
Variation delta U；According to change in detection signal amount Δ U and the touch-control feedback intensity S and input detected value U0Function close
It is Δ U (S, U0) and the touch-control feedback intensity S and touch-control pressure value F and position of touch r functional relation S (F, r), calculate
Obtain touch-control pressure value F at presently described position of touch r.
2. touch-control pressure detection method according to claim 1, which is characterized in that with the position of touch r with it is described
The increase of the distance between pressure sensor, the touch-control feedback intensity S reduce.
3. touch-control pressure detection method according to claim 1, which is characterized in that with the position of touch r with it is described
The increase of the distance between the central point of touch panel, the touch-control feedback intensity S reduce.
4. touch-control pressure detection method according to claim 1, which is characterized in that the touch panel edge is provided with two
A or more than two pressure sensors；
The different pressure sensors at same position of touch r by the touch-control feedback intensity S of identical touch-control pressure value F not
Together；And for the different pressure sensors, the input of the position of touch r and the pressure sensor of the touch panel
Detected value U0Corresponding relationship it is different.
5. touch-control pressure detection method according to claim 1, which is characterized in that obtain current position of touch r described
Before, further includes:
The pressure sensor is obtained in no pressure touch-control, the different input detected value U0Corresponding output bias U '；
It is described according to the output detection value U, determine touch-control pressure value F at presently described position of touch r, comprising:
According to the corresponding input detected value U of the output detection value U and the output detection value U0The obtained output
Bias U ' determines touch-control pressure value F at presently described position of touch r.
6. touch-control pressure detection method according to claim 1, which is characterized in that the pressure sensor includes feeling of stress
Answer bridge sensor or semiconductor pressure resistance sensor.
7. touch-control pressure detection method according to claim 6, which is characterized in that the pressure sensor is pressure sensitive
Bridge sensor,
The pressure sensitive bridge sensor includes the first inductive reactance, the second inductive reactance, third inductive reactance and the 4th sense
Answer resistance；The pressure sensitive bridge sensor further includes the first extending direction and the second extending direction, the first extension side
To arranged in a crossed manner with second extending direction；
The first end of first inductive reactance and the first end of the 4th inductive reactance are electrically connected with the first power input
It connects, the first end of the second end of first inductive reactance and second inductive reactance and the first inductive signal measurement end electricity
Connection, the second end of the 4th inductive reactance and the first end of the third inductive reactance and the second inductive signal measurement end
Second end and second source the input terminal electricity of electrical connection, the second end of second inductive reactance and the third inductive reactance
Connection；
First inductive reactance is greater than by component of the development length of first end to second end on first extending direction
Component on second extending direction, second inductive reactance are prolonged by the development length of first end to second end second
The component stretched on direction is greater than the component on the first extending direction, third inductive reactance the prolonging by first end to second end
Elongation is greater than the component on the second extending direction in the component on the first extending direction, and the 4th inductive reactance is by first
The development length of second end is held to be greater than the component on the first extending direction in the component on the second extending direction；
First power input and the second source input terminal are used to input institute to the pressure sensitive bridge sensor
State input detected value U0；The first inductive signal measurement end and the second inductive signal measurement end are used for from the feeling of stress
Bridge sensor is answered to export the output detection value U.
8. touch-control pressure detection method according to claim 7 characterized by comprising
The principal strain directions of the pressure sensitive bridge sensor with apart from the pressure sensitive bridge sensor recently described in
The size of the angle in touch panel sideline is 45 °.
9. touch-control pressure detection method according to claim 7, which is characterized in that the pressure sensor is semiconductor pressure
Force snesor；
The semiconductor pressure sensor is amorphous silicon material film or polycrystalline silicon material film；
The semiconductor pressure sensor includes the first power input and second source input terminal, is used for the semiconductor pressure
Force snesor inputs the input detected value U0, the semiconductor pressure sensor further includes the first inductive signal measurement end and
Two inductive signal measurement ends, for exporting the output detection value U from the semiconductor pressure sensor.
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| CN107632732A (en) * | 2017-09-20 | 2018-01-26 | 厦门天马微电子有限公司 | Display panel, display device and touch control operation moving direction recognition methods |
| CN108334236A (en) * | 2018-02-28 | 2018-07-27 | 普天智能照明研究院有限公司 | Touch panel |
| CN110908542A (en) * | 2019-11-29 | 2020-03-24 | 上海众链科技有限公司 | Screen assembly of intelligent terminal, screen pressure detection method and computer readable storage medium |
| CN112817478A (en) * | 2021-01-22 | 2021-05-18 | 维沃移动通信有限公司 | Pressure-sensitive signal processing method and device, electronic equipment and readable storage medium |
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