CN206741459U - Pressure-sensing module, contactor control device and OLED display - Google Patents
Pressure-sensing module, contactor control device and OLED display Download PDFInfo
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- CN206741459U CN206741459U CN201720485772.8U CN201720485772U CN206741459U CN 206741459 U CN206741459 U CN 206741459U CN 201720485772 U CN201720485772 U CN 201720485772U CN 206741459 U CN206741459 U CN 206741459U
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Abstract
The utility model provides a kind of pressure-sensing module, and the pressure-sensing module comprises at least：One substrate and one be formed at the substrate surface power sensed layer, the power sensed layer includes multiple pressure sensitivity resistance, the pressure sensitivity resistor matrix formula is arranged in the surface of the substrate, every four pressure sensitivity resistance forms a Wheatstone bridge to detect pressure size, and pressure sensitivity resistance shares between different Wheatstone bridges.The utility model also provides a kind of contactor control device, including one is used for the touch control electrode layer of detecting position of touch, and the contactor control device further comprises pressure-sensing module as described above, and the pressure-sensing module is arranged on touch control electrode layer side.The utility model provides a kind of OLED display, including an oled layer and pressure-sensing module as described above, the pressure-sensing module are arranged on oled layer side.Pressure-sensing module, contactor control device and the OLED display have the advantages that pressure sensitivity detection signal amount is big, detects flexible mode and high sensitivity.
Description
【Technical field】
It the utility model is related to touch-control field, more particularly to a kind of pressure-sensing module, contactor control device and OLED display dresses
Put.
【Background technology】
Electronic equipment carries pressure-sensing module and has become a kind of trend, and pressure-sensing module includes multiple pressure sensitivity lists
Member, when pressure sensitivity unit is sensed from pressure caused by user's touch control operation, certain deformation can be produced so as to cause pressure
The output electric signal of sense unit is changed, and the pressure obtained suffered by pressure sensitivity unit can be calculated by detecting the size of electrical number
Size.The electronic functionalities being matched with different pressures value can be designed by the detecting to pressure size, for example different power
Same touch point can match multiple functions under degree, in this way, the function of electronic product can further be enriched, new body is brought to user
Test.
Pressure-sensing module generally includes a substrate and the multiple separate pressure sensitivity units being arranged on substrate, each
Pressure sensitivity unit includes the Wheatstone bridge that four resistance identical pressure sensitivity resistance are formed, and pressure size is entered by Wheatstone bridge
Row detecting, that is, being provided with multiple pressure sensitivity units on substrate, each pressure sensitivity unit is separate Wheatstone bridge.By
At least need to use a Wheatstone bridge in pressure detection each time, and each Wheatstone bridge is required to use four
Pressure sensitivity resistance, can be set that pressure sensitivity element number is less in unit sizes, this cause single pressure detect in can detection signal amount
Small, the resolution of pressure detection is low, and pressure detection mode is single.
【Utility model content】
In order in overcoming existing pressure-sensing module single pressure to detect can detection signal amount it is small, resolution is low to ask
Inscribe, a kind of pressure-sensing module, contactor control device and OLED display are provided in the utility model.
In order to solve the above-mentioned technical problem, the utility model provides a kind of pressure-sensing module, the pressure-sensing module
Comprise at least：One substrate and one be formed at the substrate surface power sensed layer, the power sensed layer include multiple pressure sensitivity electricity
Resistance, the pressure sensitivity resistor matrix formula are arranged in the surface of the substrate, and every four pressure sensitivity resistance forms a Wheatstone bridge to detect
Measuring pressure size, pressure sensitivity resistance shares between different Wheatstone bridges.
Preferably, the combination different from adjacent pressure sensitivity resistance progress in different sequential of each pressure sensitivity resistance is to form
At least two different Wheatstone bridges.
Preferably, the bearing of trend of any pressure sensitivity resistance is different from the bearing of trend of pressure sensitivity resistance adjacent thereto.
Preferably, the bearing of trend of the bearing of trend of any pressure sensitivity resistance and pressure sensitivity resistance adjacent thereto is vertical.
Preferably, form Wheatstone bridge four pressure sensitivity resistance are adjacent and rectangular distribution.
Preferably, a signal processing module is further comprised, the pressure sensitivity resistance both ends respectively pass through independent cabling
It is connected to signal processing module.
Preferably, signal processing module provides electric signal by cabling for pressure sensitivity resistance, and any four pressure sensitivity resistance is formed
Wheatstone bridge is to detect pressure size.
Preferably, the multiple pressure sensitivity resistance is defined as the pressure sensitivity resistance that multiple matrix forms are arranged in the surface of the substrate
Group, each pressure sensitivity resistance group include two adjacent pressure sensitivity resistance in a second direction, arbitrary neighborhood on first direction
Two pressure sensitivity resistance groups form a Wheatstone bridge to detect pressure size, and the one of which in first direction and second direction is pressure
The horizontal arragement direction of sensing resistor matrix form arrangement, another one is longitudinal arrangement direction.
Preferably, the two pressure sensitivity resistance that each pressure sensitivity resistance group includes are the first pressure sensitivity resistance and the second pressure sensitivity resistance,
First pressure sensitivity resistance and the second pressure sensitivity resistance are respectively provided with relative first end and the second end, the first end of the first pressure sensitivity resistance and
The first end connection of two pressure sensitivity resistance simultaneously forms an output end at the end, and the second end of the first pressure sensitivity resistance connects the first cabling,
Second end of the second pressure sensitivity resistance connects the second cabling, and the first cabling of the first pressure sensitivity resistance of multiple pressure sensitivity resistance groups is conllinear,
Second cabling of the second pressure sensitivity resistance of multiple pressure sensitivity resistance groups is separate, two pressure sensitivity resistance of arbitrary neighborhood on first direction
When group forms Wheatstone bridge, the output end of the two pressure sensitivity resistance group forms the output end of the Wheatstone bridge.
Preferably, a signal processing module is further comprised, the signal processing module provides for the pressure sensitivity resistance group
For electric signal so that the first cabling is connected to VDD, the second cabling is connected to GND；Or first cabling be connected to GND, the second cabling connects
It is connected to VDD.
Preferably, the two pressure sensitivity resistance that each pressure sensitivity resistance group includes are the first pressure sensitivity resistance and the second pressure sensitivity resistance,
First pressure sensitivity resistance and the second pressure sensitivity resistance are respectively provided with relative first end and the second end, the first end of the first pressure sensitivity resistance and
The first end connection of two pressure sensitivity resistance simultaneously forms an output end at the end, and the second end of the first pressure sensitivity resistance connects the first cabling,
Second end of the second pressure sensitivity resistance connects the second cabling, and the first cabling of the first pressure sensitivity resistance of multiple pressure sensitivity resistance groups is mutually only
Vertical, the second cabling of the second pressure sensitivity resistance of multiple pressure sensitivity resistance groups is separate, two pressure sensitivity of arbitrary neighborhood on first direction
When resistance group forms Wheatstone bridge, the output end of the two pressure sensitivity resistance group forms the output end of the Wheatstone bridge.
Preferably, a signal processing module is further comprised, the signal processing module is the first cabling and the second cabling
Electric signal is provided so that the one of the first cabling and the second cabling is connected to VDD, another one is connected to GND.
The utility model provides a kind of contactor control device, including one is used for the touch control electrode layer of detecting position of touch, described to touch
Control device further comprises a pressure-sensing module as described above, and the pressure-sensing module is arranged on touch control electrode layer one
Side.
The utility model provides a kind of OLED display, including an oled layer and pressure-sensing module as described above,
The pressure-sensing module is arranged on oled layer side.
Preferably, the pressure-sensing module is arranged on oled layer surface.
Preferably, a screen layer and insulating barrier, the insulating barrier are provided between oled layer and the pressure-sensing module
It is arranged between screen layer and pressure-sensing module.
Compared with prior art, pressure-sensing module using Wheatstone bridge carry out pressure detection, due to pressure sensitivity resistance it
Between can be with independent assortment, pressure sensitivity resistance shares between different Wheatstone bridges, and which greatly improves the favour in unit sizes
The quantity of stone electric bridge, single pressure detecting in can detection signal amount greatly promote, improve the resolution of pressure detection, make
It is flexible and changeable to obtain pressure detection mode.The increase of Wheatstone bridge quantity causes the accuracy of pressure detection more in unit sizes
It is high.Because the bearing of trend of any pressure sensitivity resistance in power sensed layer is different from the bearing of trend of pressure sensitivity resistance adjacent thereto, structure
Two of which pressure sensitivity resistance into Wheatstone bridge has bearing of trend different from two other pressure sensitivity resistance, and with identical
The pressure sensitivity resistance of bearing of trend is non-conterminous, and this causes the output of Wheatstone bridge is realized to maximize, and further improves feeling of stress
Survey the sensitivity of the pressure detection of module.
【Brief description of the drawings】
Figure 1A -3B are the planar structure schematic diagram of different resistance.
Fig. 4 A are the layer structure schematic diagram of the utility model first embodiment pressure-sensing module.
Fig. 4 B are the flat of the pressure sensitivity resistance arrangement in the power sensed layer of the utility model first embodiment pressure-sensing module
Face structural representation.
Fig. 5 is the electrical block diagram of the power sensed layer of the utility model first embodiment pressure-sensing module.
Fig. 6 A-6D are respectively the power sensed layer of the utility model first embodiment pressure-sensing module at M, N, K, L
The pressure sensitivity resistance selection schematic diagram of Wheatstone bridge is formed in work schedule.
Fig. 7 A are the planar structure schematic diagram of Wheatstone bridge in the utility model first embodiment pressure-sensing module.
Fig. 7 B are the electrical block diagram of Wheatstone bridge in Fig. 7 A.
Fig. 8 A are the layer structure schematic diagram of the utility model second embodiment pressure-sensing module.
Fig. 8 B are the flat of the pressure sensitivity resistance arrangement in the power sensed layer of the utility model second embodiment pressure-sensing module
Face structural representation.
Fig. 9 is the electrical block diagram of pressure sensitivity resistance group in the utility model second embodiment.
Figure 10 is the electrical block diagram of the power sensed layer of the utility model second embodiment pressure-sensing module.
Figure 11 A be the utility model second embodiment pressure-sensing module power sensed layer in the Z work schedule structure
Into the pressure sensitivity resistance selection schematic diagram of Wheatstone bridge.
Figure 11 B are the electrical block diagram of Wheatstone bridge in the utility model second embodiment pressure-sensing module.
Figure 12 is that the power sensed layer of the utility model second embodiment pressure-sensing module is formed in the T work schedule
The pressure sensitivity resistance selection schematic diagram of Wheatstone bridge.
Figure 13 A are the circuit modifications structural representation of the power sensed layer of the utility model second embodiment pressure-sensing module
Figure.
Figure 13 B are that the pressure sensitivity resistance of power sensed layer in Figure 13 A forms the electrical block diagram of Wheatstone bridge.
Figure 14 A are that the another distressed structure of circuit of the power sensed layer of the utility model second embodiment pressure-sensing module shows
It is intended to.
Figure 14 B are that the pressure sensitivity resistance of power sensed layer in Figure 14 A forms the electrical block diagram of Wheatstone bridge.
Figure 15 is the layer structure schematic diagram of the utility model 3rd embodiment contactor control device.
Figure 16 is the layer structure schematic diagram of the utility model fourth embodiment OLED display.
Figure 17 is the layer structure schematic diagram of the embodiment OLED display of the utility model the 5th.
【Embodiment】
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only solving
The utility model is released, is not used to limit the utility model.
Bearing of trend on pressure sensitivity resistance defines as follows：The total projection of the electrode pattern of pressure sensitivity resistance in one direction
When length is more than the total projection length on other any directions, it is believed that described a direction is the extension side of pressure sensitivity resistance
To.Preferably, the projected length of pressure sensitivity resistance in their extension direction is at least pressure sensitivity resistance projected length in the other direction
More than 5 times.For pressure sensitivity resistance with bearing of trend when being under pressure, the strain of pressure sensitivity resistance in their extension direction is much
The strain occurred more than other directions, thus, it is believed that the strain that pressure sensitivity resistance occurs is approximately equal to the strain on bearing of trend.
Figure 1A is referred to, the pressure sensitivity resistance shown in Figure 1A is designated as pressure sensitivity resistance r, the maximum total projection length of its electrode pattern
Degree is included in X-direction total projection length d and in the Y direction total projection length h, and X-direction is perpendicular to Y-direction.Pressure sensitivity resistance r is along X
The pressure sensitivity resistance r electrode patterns are divided into multistage by direction along Y-direction, in X direction on total projection length d be equal to line segment
D1, line segment d2, line segment d3, line segment d4, line segment d5 and line segment d6 sums, total projection length h is equal to line segment h1, line along in Y-direction
Section h2, line segment h3, line segment h4 and line segment h5 sums.It was found from Figure 1A, in X direction on total projection length d be more than along in Y-direction
Total projection length h.Similarly in above-mentioned analysis, the total projection length of pressure sensitivity resistance r electrode patterns in the X direction is more than it any
Total projection length on other directions.Therefore, pressure sensitivity resistance r bearing of trend is X-direction.Preferably, pressure sensitivity resistance r electrode figures
The total projection length of case in the X direction is more than 5 times of its total projection length in the Y direction.Pressure sensitivity resistance r is in its bearing of trend
On strain be far longer than other directions generation strain, thus, it is believed that pressure sensitivity resistance r occur strain be approximately equal to extension
Strain on direction.
Figure 1B is referred to, the pressure sensitivity resistance shown in Figure 1B is designated as pressure sensitivity resistance r ', and pressure sensitivity resistance r ' is pressure sensitivity in Figure 1A
The resistance r 90 ° of gained that turn clockwise, similarly in Figure 1A pressure sensitivity resistance r analysis, pressure sensitivity resistance r ' bearing of trend is
Y-direction.The strain that pressure sensitivity resistance r ' occurs is approximately equal to its strain in the Y direction.
The electrode pattern of pressure sensitivity resistance with bearing of trend is not limited to the pattern form shown in Figure 1A and Figure 1B.Such as figure
Pressure sensitivity resistance Ra electrode pattern is always thrown around wire, the ellipse for ellipse around the electrode pattern of wire along transverse direction in 2A
Shadow length is maximum, and its major axis is parallel to X-direction, and therefore, pressure sensitivity resistance Ra bearing of trend is X-direction.By pressure sensitivity electricity in Fig. 2A
Resistance Ra turns clockwise 90 ° the pressure sensitivity resistance Ra ' obtained in Fig. 2 B, and pressure sensitivity resistance Ra ' bearing of trend is Y-direction.Such as Fig. 3 A
Electrode pattern with pressure sensitivity resistance Rb in 3B and pressure sensitivity resistance Rb ' is " fence " shape polyline shaped, and the pressure sensitivity resistance Rb's prolongs
It is X-direction to stretch direction, and the bearing of trend of the pressure sensitivity resistance Rb ' is Y-direction.The electrode figure of pressure sensitivity resistance with bearing of trend
Case can also be other pattern forms, such as waveform, zigzag etc., the electrode pattern for the pressure sensitivity resistance that Figure 1A -3B are provided
And its deformation is applied to the pressure sensitivity resistance employed in the utility model.
Fig. 4 A are referred to, the utility model first embodiment pressure-sensing module 10 includes a substrate 11, in substrate 11
Upper surface (noun of locality such as involved upper and lower, left and right is only relative position in given view in the utility model, it is possible to understand that
When 180 ° of given view Plane Rotation, the noun of locality " on " be " under ") formed with a power sensed layer 13, power sensed layer 13 is with substrate
11 be bearing bed.
Substrate 11 can be flexible base board or rigid substrates, be specifically as follows glass, sapphire, polyimides (PI), poly-
Propylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) (ABS), PET (PET), polychlorostyrene
Ethene (PVC), makrolon (PC), polyethylene (PE), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE) (PTFE) etc..
Fig. 4 B are referred to, power sensed layer 13 includes multiple resistance identical pressure sensitivity resistance (131a and 131b), the pressure sensitivity
Resistor matrix formula is arranged in the upper surface of substrate 11.The horizontal direction of matrix form arrangement is defined as first direction, matrix form arrangement
Longitudinal direction be defined as second direction, first direction is vertical with second direction.Any pressure sensitivity resistance and pressure sensitivity adjacent thereto
The bearing of trend of resistance is inconsistent, it will be understood that two pressure sensitivity resistance of arbitrary neighborhood prolongs on first direction or in second direction
It is inconsistent to stretch direction.Preferred multiple pressure sensitivity resistance employ two kinds of different pressure sensitivity resistance in the utility model, and one of which is
Pressure sensitivity resistance 131a with the first bearing of trend, another kind is the pressure sensitivity resistance 131b with the second bearing of trend.With
The pressure sensitivity resistance 131a of one bearing of trend is identical with the pressure sensitivity resistance 131b resistances with the second bearing of trend.In a first direction
With with the bearing of trend of the adjacent pressure sensitivity resistance 131b of pressure sensitivity resistance 131a with the first bearing of trend be the in second direction
Two bearing of trends.For by taking the pressure sensitivity resistance 131a of the 2nd row the 2nd in Fig. 4 B as an example, prolonging for the pressure sensitivity resistance 131a is defined
It is first direction to stretch direction, and the pressure sensitivity resistance 131b adjacent with pressure sensitivity resistance 131a prolongs in the first direction and a second direction
It is second direction to stretch direction.
Referring to Fig. 5, Fig. 5 is the electrical block diagram of power sensed layer 13.Pressure-sensing module 10 further comprises one
Signal processing module 15, the both ends of pressure sensitivity resistance are connected to signal processing module 15, signal transacting by different cablings 133
Module 15 to pressure sensitivity resistance provides different electric signal so that any four pressure sensitivity resistance forms Wheatstone bridge, meanwhile, signal
Processing module 15 obtains the output signal of Wheatstone bridge to detect pressure size.
6A-6D is referred to, using M, N, K, L (M, N, K, L is positive integers and are not mutually equal) work of pressure-sensing module 10
Make to illustrate exemplified by sequential.As shown in Figure 6A, in the m-th sequential of pressure-sensing module 10, signal processing module 15 is given
First and second pressure sensitivity resistance of first and second pressure sensitivity resistance of the first row and the second row provides electric signal so that four pressure sensitivity resistance
Form Wheatstone bridge 130a.When the region where having pressure to act on Wheatstone bridge 130a, Wheatstone bridge 130a is protected
Maintain an equal level weighing apparatus, output signal 0.When the region where thering is pressure to act on Wheatstone bridge 130a, Wheatstone bridge 130a
One or more of pressure sensitivity resistance strain, Wheatstone bridge 130a poised states are broken, and Wheatstone bridge 130a is defeated
The electric signal gone out corresponds to the pressure size for being applied to the region.
As shown in Figure 6B, in the n-th sequential of pressure-sensing module 10, signal processing module 15 give the first row second and third
Individual second and third pressure sensitivity resistance of pressure sensitivity resistance and the second row provides electric signal so that four pressure sensitivity resistance form Wheatstone bridge
130b, in this way, in m-th sequential and n-th sequential, second pressure sensitivity resistance of second pressure sensitivity resistance of the first row and the second row
Realize shared, be i.e. realize pressure sensitivity resistance between Wheatstone bridge 131a and Wheatstone bridge 131b and share.
As shown in Figure 6 C, in the k-th sequential of pressure-sensing module 10, signal processing module 15 gives the second row first and second
Individual first and second pressure sensitivity resistance of pressure sensitivity resistance and the third line provides electric signal so that four pressure sensitivity resistance form Wheatstone bridge
130c, in this way, in m-th sequential and k-th sequential, the second pressure sensitivity resistance of row first and second realizes shared, i.e. favour stone
Pressure sensitivity resistance is realized between electric bridge 131a and Wheatstone bridge 131c to share.In n-th sequential and k-th sequential, second
Second pressure sensitivity resistance of row realizes shared, i.e. realizes pressure sensitivity resistance between Wheatstone bridge 131b and Wheatstone bridge 131c
Share.
As shown in Figure 6 D, in the l-th sequential of pressure-sensing module 10, signal processing module 15 give the second row second and third
Individual second and third pressure sensitivity resistance of pressure sensitivity resistance and the third line provides electric signal so that four pressure sensitivity resistance form Wheatstone bridge
130d, in this way, in m-th sequential and l-th sequential, the second pressure sensitivity resistance of row second realizes shared, i.e. favour stone electricity
Pressure sensitivity resistance is realized between bridge 131a and Wheatstone bridge 131d to share.In n-th sequential and l-th sequential, the second row
Second and third pressure sensitivity resistance realize it is shared, i.e. realized between Wheatstone bridge 131b and Wheatstone bridge 131d pressure sensitivity electricity
Resistance shares.In k-th sequential and l-th sequential, second the second row second, the third line pressure sensitivity resistance realize it is shared,
That is between Wheatstone bridge 131c and Wheatstone bridge 131d pressure sensitivity resistance is realized to share.
Signal processing module 15 can give any four pressure sensitivity resistance to provide electric signal so that it forms Wheatstone bridge
Pressure is detected, in order that pressure detection sensitivity is higher, the pressure sensitivity resistance of Wheatstone bridge is preferably constituted in the utility model
Adjacent and rectangular distribution.
Fig. 7 A and 7B are referred to, four pressure sensitivity resistance that adjacent and rectangular distribution is chosen in power sensed layer 13 are formed such as
Wheatstone bridge shown in Fig. 7 A, mutually non-conterminous pressure sensitivity resistance is the pressure sensitivity resistance with the first bearing of trend to two of which
131a, mutually non-conterminous pressure sensitivity resistance is the pressure sensitivity resistance 131b with the second bearing of trend for two other.The Wheatstone bridge
Four pressure sensitivity resistance correspond to resistance identical pressure sensitivity resistance R1, pressure sensitivity resistance R2, pressure sensitivity resistance R3And pressure sensitivity resistance R4, wherein
Pressure sensitivity resistance R1With pressure sensitivity resistance R4Electrode pattern is identical, has the first bearing of trend；Pressure sensitivity resistance R2With pressure sensitivity resistance R3Electrode
Pattern is identical, has the second bearing of trend；First bearing of trend is different from the second bearing of trend.Four pressure sensitivity resistance electrically connect
It is connected into Wheatstone bridge, specially pressure sensitivity resistance R1With pressure sensitivity resistance R2Series connection, pressure sensitivity resistance R3With pressure sensitivity resistance R4Series connection, two
Individual serial circuit is connected in parallel and forms Wheatstone bridge again.Further, in pressure sensitivity resistance R1With pressure sensitivity resistance R3Electrically connect
Contact B and pressure sensitivity resistance R4And pressure sensitivity resistance R2Electric connection point D between load a power supply VEX.Pressure sensitivity resistance R1With pressure sensitivity electricity
Hinder R2Electric connection point A and pressure sensitivity resistance R3With pressure sensitivity resistance R4Electric connection point C between form output voltage U0, voltage U0
Corresponding pressing force value.
Wherein, pressure sensitivity resistance R1Both ends pressure drop is represented by：
Pressure sensitivity resistance R3Both ends pressure drop is represented by：
The voltage U of electric bridge output0It is represented by
In the utility model, R1=R2=R3=R4, the condition is substituted into formula (3), and generation brings rear caused high-order into
It is micro to ignore to be simplified to obtain to formula (3)：
The ratio between pressure sensitivity resistance change and initial pressure sensitivity resistance value of corresponding pressure sensitivity resistance caused by pressing effect and institute
The strain magnitude relation stated after the depressed effect of pressure sensitivity resistance is as follows：
ΔR/R=Kε (5)
Wherein K is the piezoresistance coefficient of pressure sensitivity resistance.
With reference to above-mentioned formula (4) and formula (5), then U0 can be further represented as：
Wherein K be pressure sensitivity resistance piezoresistance coefficient, UBDTo be carried in the power supply VEX sizes between electric connection point B, D,
ε1, ε2, ε3And ε4Correspond in pressure sensitivity resistance R1, pressure sensitivity resistance R2, pressure sensitivity resistance R3And pressure sensitivity resistance R4Dependent variable.
Due to the pressure sensitivity resistance R1, pressure sensitivity resistance R2, pressure sensitivity resistance R3And pressure sensitivity resistance R4In resistance it is identical, pressure sensitivity
Resistance R1With pressure sensitivity resistance R4Electrode pattern it is identical, bearing of trend is consistent；Pressure sensitivity resistance R2With pressure sensitivity resistance R3Electrode pattern
Identical, bearing of trend is consistent, in four pressure sensitivity resistance R1, pressure sensitivity resistance R2, pressure sensitivity resistance R3And pressure sensitivity resistance R4The finger being subject to
In the case of pressing change in resistance identical caused by active force and temperature change, pressure sensitivity resistance R1With pressure sensitivity resistance R4Strain
It can be assumed that consistent, pressure sensitivity resistance R2With pressure sensitivity resistance R3Strain can be assumed that unanimously.That is pressure sensitivity resistance R1, pressure sensitivity resistance R2、
Pressure sensitivity resistance R3And pressure sensitivity resistance R4Relation is represented by between caused dependent variable after being pressed by finger：ε1=ε4=εx, ε2
=ε3=εy, therefore, above-mentioned formula (6) can be further converted to：
εxFor pressure sensitivity resistance R1Or pressure sensitivity resistance R4The strain of generation, due to pressure sensitivity resistance R1Or pressure sensitivity resistance R4Have the
One bearing of trend, therefore, εxPressure sensitivity resistance R can be considered1Or pressure sensitivity resistance R4The strain occurred in a first direction.Similarly,
εyFor pressure sensitivity resistance R2Or pressure sensitivity resistance R3The strain occurred in a second direction.
It was found from from formula (6), work as εxAnd εyDifference it is bigger, U0Output valve it is bigger, the clever lightness of pressure detection is better.
Because the bearing of trend of any pressure sensitivity resistance and pressure sensitivity resistance adjacent thereto is inconsistent, therefore, arbitrarily select adjacent and rectangular
Four pressure sensitivity resistance of distribution, which form Wheatstone bridge, can ensure pressure sensitivity resistance R1With pressure sensitivity resistance R4With identical first
Bearing of trend；Pressure sensitivity resistance R2With pressure sensitivity resistance R3With the bearing of trend of identical second, the first bearing of trend and the second extension side
It can ensure to obtain larger U to difference0Output valve.
It is preferred that first direction is vertical with second direction, U0Output valve, which is realized, to be maximized.Further preferably, there is the first extension
Pattern form after 90 ° of the resistance pattern shape Plane Rotation in direction is identical with the resistance pattern shape with the second bearing of trend
Or specular.It can simplify manufacturing process while the stability that wheatstone bridge can so be ensured.
It is appreciated that comparatively first direction and second direction are, both titles can exchange.
Fig. 8 A are referred to, the utility model second embodiment pressure-sensing module 20 includes a substrate 21, in substrate 21
Upper surface (noun of locality such as involved upper and lower, left and right is only relative position in given view in the utility model, it is possible to understand that
When 180 ° of given view Plane Rotation, the noun of locality " on " be " under ") formed with a power sensed layer 23, power sensed layer 23 is with substrate
21 be bearing bed.Substrate 21 is consistent with the substrate 11 in first embodiment.
Fig. 8 B are referred to, power sensed layer 23 includes multiple resistance identical pressure sensitivity resistance (231a and 231b), the pressure sensitivity
Resistor matrix formula is arranged in the upper surface of substrate 21.The horizontal direction of matrix form arrangement is defined as first direction, matrix form arrangement
Longitudinal direction be defined as second direction, first direction is vertical with second direction.Any pressure sensitivity resistance and pressure sensitivity adjacent thereto
The bearing of trend of resistance is inconsistent, it will be understood that two pressure sensitivity resistance of arbitrary neighborhood prolongs on first direction or in second direction
It is inconsistent to stretch direction.Preferred multiple pressure sensitivity resistance employ two kinds of different pressure sensitivity resistance in the utility model, and one of which is
Pressure sensitivity resistance 231a with the first bearing of trend, another kind is the pressure sensitivity resistance 231b with the second bearing of trend.With
The pressure sensitivity resistance 231a of one bearing of trend is identical with the pressure sensitivity resistance 231b resistances with the second bearing of trend.In a first direction
With with the bearing of trend of the adjacent pressure sensitivity resistance 231b of pressure sensitivity resistance 231a with the first bearing of trend be the in second direction
Two directions.
Also referring to Fig. 8 B and Fig. 9, the multiple pressure sensitivity resistance is defined as multiple matrix forms and is arranged in the substrate 21
Surface pressure sensitivity resistance group 239, two pressure sensitivity resistance groups 239 of arbitrary neighborhood form a Wheatstone bridge to detect on first direction
Measuring pressure size, i.e., four pressure sensitivity resistance of adjacent and rectangular distribution form Wheatstone bridge to detect pressure size.It is preferred that
Ground, each pressure sensitivity resistance group 239 include two adjacent the first pressure sensitivity resistance Ra and the second pressure sensitivity resistance Rb in a second direction,
First pressure sensitivity resistance Ra has relative first end a and the second end b, and the second pressure sensitivity resistance Rb has relative first end c and
Two end d, the first pressure sensitivity resistance Ra first end a and the second pressure sensitivity resistance Rb first end c connections simultaneously form an output at the end
O is held, when two pressure sensitivity resistance groups 239 form Wheatstone bridge, the output end O in two pressure sensitivity resistance groups 239 constitutes favour stone
The output end of electric bridge.First pressure sensitivity resistance Ra the second end b the first cablings of connection 233a, the second pressure sensitivity resistance Rb the second end d
The one of which connected in the second cabling 233b, the first cabling 233a and the second cabling 233b meets VDD, and another one meets GND, VDD
With the both positive and negative polarity that GND is power supply VEX.It is appreciated that the first pressure sensitivity resistance Ra can be the pressure sensitivity electricity with the first bearing of trend
It can have the first bearing of trend to hinder 231a or have pressure sensitivity the resistance 231b, the second pressure sensitivity resistance Rb of the second bearing of trend
The pressure sensitivity resistance 231a or pressure sensitivity resistance 231b with the second bearing of trend.In the utility model preferably the first pressure sensitivity resistance Ra and
Second pressure sensitivity resistance Rb bearing of trends are different, and preferably both described bearing of trend is vertical.
Referring to Fig. 10, preferably, the first cabling 233a of multiple pressure sensitivity resistance groups 239 is collinearly connected to a signal transacting mould
Block 25, the second cabling 233b of multiple pressure sensitivity resistance groups 239 are mutually independently connected to signal processing module 25.Multiple pressure sensitivity resistance
The output end O of group 239 is also connected to signal processing module 25.Signal processing module 25 provides different electric signals to pressure sensitivity resistance
So that two pressure sensitivity resistance groups 239 of arbitrary neighborhood form Wheatstone bridge on first direction, meanwhile, signal processing module 25 obtains
The output signal of Wheatstone bridge is taken to detect pressure size.
11A and Figure 11 B are referred to, using Z, T of pressure-sensing module 20 (Z, T as positive integer and unequal) work schedule
Exemplified by illustrate.As shown in Figure 11 A, in the Z sequential of pressure-sensing module 20, signal processing module 25 gives pressure sensitivity electricity
239 the first row of resistance group, first and second pressure sensitivity resistance group 239 provides electric signal so that four pressure sensitivity resistance are formed as shown in Figure 11 B
Wheatstone bridge 230a.Signal processing module 25 provides electric signal to two the first pressure sensitivity resistance Ra the first cabling 233a to be made
It is connected to VDD, i.e., two the first pressure sensitivity resistance Ra the second end b is conllinear and is connected to VDD, and signal processing module 25 is to difference
The second cabling 233b of the second independent pressure sensitivity resistance Rb provides electric signal and is connected to GND, and signal processing module 25 gathers
Two output end O output signal, that is, gather the output end U0 of Wheatstone bridge.When no pressure acts on Wheatstone bridge 230a institutes
Region when, Wheatstone bridge 230a keep balance, output signal U 0 be 0.Wheatstone bridge 230a is acted on when there is pressure
During the region at place, one or more of Wheatstone bridge 230a pressure sensitivity resistance is strained, and Wheatstone bridge 230a is put down
Weighing apparatus state is broken, and the electric signal of Wheatstone bridge 230a outputs is to correspond to the pressure size for being applied to the region.
Refer to Figure 12, in the T sequential of pressure-sensing module 20, signal processing module 25 give the first row second and third
Individual pressure sensitivity resistance group 239 provides electric signal so that four pressure sensitivity resistance form Wheatstone bridge 230b, in this way, at the Z
In sequence and the T sequential, second pressure sensitivity resistance group 239 of the first row realizes shared, i.e. Wheatstone bridge 230a and favour stone
Pressure sensitivity resistance is realized between electric bridge 230b to share, and in pressure detection, is preferably carried in the first cabling 233a and second and is walked
Signal on line 233b is without changing, it is only necessary to changes the output end O selected by signal processing module 25, so is ensureing to improve pressure
While force signal detecting amount, the signal transacting load of pressure-sensing module 20 is greatly reduced.
Deformed as one kind, signal processing module 25 to the first pressure sensitivity resistance Ra in two pressure sensitivity resistance groups 239 the
One cabling 233a provides electric signal and is connected to GND, and the second pressure sensitivity resistance Rb the second cabling 233b is connected to VDD.This kind
Deformation is it can be appreciated that the electrical connection between adjacent two pressure sensitivity resistance group 239 is changed, such as Figure 13 A and 13B
Shown, the second cabling 233b ' of multiple pressure sensitivity resistance groups 239 ' is conllinear and is connected to a signal processing module 25 ', multiple pressure sensitivity electricity
First cabling 233a ' of resistance group 239 ' is mutually independently connected to signal processing module 25 '.The output of multiple pressure sensitivity resistance groups 239 '
End O ' is also connected to signal processing module 25 '.Signal processing module 25 ' provides different electric signals so that first to pressure sensitivity resistance
Two pressure sensitivity resistance groups 239 ' of arbitrary neighborhood form Wheatstone bridge on direction.Specifically, signal processing module 25 ' gives two
The first cabling 233a ' of the first pressure sensitivity resistance Ra ' in pressure sensitivity resistance group 239 ' provides electric signal and is connected to VDD, signal
Processing module 25 ' provides electric signal to the second cabling 233b ' of the second conllinear pressure sensitivity resistance Rb ' and is connected to GND, i.e., and the
Two pressure sensitivity resistance Rb ' the second cabling 233b ' is conllinear and is connected to GND, and signal processing module 25 ' gathers the defeated of two output end O '
Go out signal, that is, gather the output end U0 ' of Wheatstone bridge.Similarly, adjacent two pressure sensitivity resistance groups in a second direction
239 ' can be optionally combined detecting pressure signal.
As another deformation, as shown in figs. 14 a-b, the first cabling 233a " of multiple pressure sensitivity resistance groups 239 " is homogeneous
Signal processing module 25 " is independently mutually connected to, the second cabling 233b " is mutually independently connected to signal processing module 25 ".Multiple pressure sensitivity
The output end O " of resistance group 239 " is also connected to signal processing module 25 ".Signal processing module 25 " provides different to pressure sensitivity resistance
Electric signal so that on first direction arbitrary neighborhood two pressure sensitivity resistance groups 239 " form Wheatstone bridge.Specifically, signal
Processing module 25 " provides electric signal to the second end b of the first pressure sensitivity resistance Ra " in two pressure sensitivity resistance groups 239 " makes its connection
To VDD, signal processing module 25 " provides electric signal to the second pressure sensitivity resistance Rb " the second cabling 233b " and is connected to GND,
Signal processing module 25 " gathers two output end O " output signal, that is, gathers the output end U0 " of Wheatstone bridge.As another
Kind selection, signal processing module 25 " can provide electric signal to the first pressure sensitivity resistance Ra " the first cabling 233a " make its connection
Electric signal is provided and is connected to VDD, two output ends to GND, the second pressure sensitivity resistance Rb " the second cabling 233b " the second end d
O " is the output signal of Wheatstone bridge.As another selection, two output end O " are connected respectively to VDD and GND, two first pressures
Sensing resistor Ra " the first cabling 233a " is conllinear and the second pressure sensitivity resistance Rb " the second cabling 233b " is collinearly and at the rwo
Between formed Wheatstone bridge output end.Similarly, adjacent two pressure sensitivity resistance groups 239 can be random group in a first direction
Close detecting pressure signal.
In the utility model, the one of which in first direction and second direction is the transverse direction of pressure sensitivity resistor matrix formula arrangement
Arragement direction, another one are longitudinal arrangement direction, and horizontal arragement direction and longitudinal arrangement direction are comparatively Ke Yili
Solution, horizontal arragement direction and longitudinal arrangement direction can be interchangeable.
In the utility model, comparatively the name of the first pressure sensitivity resistance and the second pressure sensitivity resistance is, it will be understood that the
The name of one pressure sensitivity resistance and the second pressure sensitivity resistance can exchange.
It is real to be applied to second for the electric connection structure of pressure sensitivity resistance and signal processing module during the utility model first is implemented
Apply example.
Compared with prior art, pressure-sensing module using Wheatstone bridge carry out pressure detection, due to pressure sensitivity resistance it
Between can be with independent assortment, pressure sensitivity resistance shares between different Wheatstone bridges, and which greatly improves the favour in unit sizes
The quantity of stone electric bridge, single pressure detecting in can detection signal amount greatly promote, improve the resolution of pressure detection, make
It is flexible and changeable to obtain pressure detection mode.The increase of Wheatstone bridge quantity causes the accuracy of pressure detection more in unit sizes
It is high.Because the bearing of trend of any pressure sensitivity resistance in power sensed layer is different from the bearing of trend of pressure sensitivity resistance adjacent thereto, structure
Two of which pressure sensitivity resistance into Wheatstone bridge has bearing of trend different from two other pressure sensitivity resistance, and has phase
Pressure sensitivity resistance with bearing of trend is non-conterminous, and this causes the U0 of Wheatstone bridge is exported to realize maximization, further improves pressure
The sensitivity of the pressure detection of power sensing module.
Figure 15 is referred to, the utility model 3rd embodiment provides a kind of contactor control device 30, and the contactor control device 30 includes lid
Plate 31, the pressure-sensing module 33 disclosed in a touch control electrode layer 32 and above-described embodiment, for detecting user's position of touch
Touch control electrode layer 32 be arranged between cover plate 31 and pressure-sensing module 33.Deformed as one kind, the pressure-sensing module
33 can be arranged between cover plate 31 and touch control electrode layer 32.I.e. described pressure-sensing module 33 can both be arranged on touch control electrode
Layer 32 can also be arranged far from the side of cover plate 31 close to the side of cover plate 31.
Figure 16 is referred to, the utility model fourth embodiment OLED display 40 includes cover plate 41 successively from top to bottom,
Pressure-sensing module 49 disclosed in oled layer 45 and above-described embodiment.Preferably, cover plate 41 and oled layer 45 pass through viscose glue
Layer 43 is bonded.Oled layer 45 is display layer, and its surface is glass material, and pressure-sensing module 49 is arranged on the table of oled layer 45
Face, i.e., the bearing bed using the surface of oled layer 45 as pressure-sensing module 49.
The upper surface of cover plate 41 is user's touch operation surface, and user sets feeling of stress below when carrying out touch control operation
Survey module 49 and sense pressing dynamics corresponding to touch control operation.
Deformed as one kind, the pressure-sensing module 49 can be arranged on oled layer 45 close to the surface of cover plate 41.
Compared with prior art, the pressure-sensing module 49 for the OLED display 40 that the present embodiment is provided is with oled layer
45 surface, without setting single bearing bed for pressure-sensing module 49, effectively reduces OLED display dresses as bearing bed
40 thickness is put, it also avoid separately setting bearing bed, bearing bed, which easily produces thermal expansion etc., causes pressure detection noise big
Shortcoming.
Figure 17 is referred to, the embodiment OLED display 50 of the utility model the 5th includes cover plate 51 successively from top to bottom,
Pressure-sensing module 59 disclosed in oled layer 55, screen layer 56, insulating barrier 57 and above-described embodiment.Preferably, cover plate 51
It is bonded with oled layer 55 by adhesive-layer 53.Screen layer 56 is provided between oled layer 55 and pressure-sensing module 59 to reduce
Oled layer 55 is to signal interference caused by pressure-sensing module 59.Preferably, screen layer 56 is metal level, more preferably
Layers of copper or graphene layer.Insulating barrier 57 is arranged between screen layer 56 and pressure-sensing module 59, avoids pressure-sensing module 59
Being electrically conducted with screen layer 56 causes short circuit.
Deformed as one kind, the pressure-sensing module 59 can be arranged on oled layer 55 close to the side of cover plate 51, phase
Ying Di, insulating barrier 57 are also provided between pressure-sensing module 59 and screen layer 56.
Compared with prior art, the pressure-sensing module 59 and oled layer for the OLED display 50 that the present embodiment is provided
Screen layer 56 is provided between 55 to reduce oled layer 55 to signal interference caused by pressure-sensing module 59, is further ensured
The detecting precision of pressure-sensing module 59.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification made within the principle of utility model, equivalent substitution and improvement etc. all should include the scope of protection of the utility model
Within.
Claims (16)
1. pressure-sensing module, it is characterised in that the pressure-sensing module comprises at least：One substrate and one it is formed at the base
The power sensed layer on the surface of plate, the power sensed layer include multiple pressure sensitivity resistance, and the pressure sensitivity resistor matrix formula is arranged in described
The surface of substrate, every four pressure sensitivity resistance form a Wheatstone bridge to detect pressure size, pressed between different Wheatstone bridges
Sensing resistor shares.
2. pressure-sensing module as claimed in claim 1, it is characterised in that：Each pressure sensitivity resistance in different sequential with phase
Adjacent pressure sensitivity resistance carries out different combinations to form at least two different Wheatstone bridges.
3. pressure-sensing module as claimed in claim 1, it is characterised in that：The bearing of trend of any pressure sensitivity resistance be different from
Adjacent pressure sensitivity resistance bearing of trend.
4. pressure-sensing module as claimed in claim 1, it is characterised in that：The bearing of trend of any pressure sensitivity resistance and therewith phase
The bearing of trend of adjacent pressure sensitivity resistance is vertical.
5. pressure-sensing module as claimed in claim 1, it is characterised in that：Form four pressure sensitivity resistance phases of Wheatstone bridge
Adjacent and rectangular distribution.
6. pressure-sensing module as claimed in claim 1, it is characterised in that：Further comprise a signal processing module, it is described
Pressure sensitivity resistance both ends are respectively connected to signal processing module by independent cabling.
7. pressure-sensing module as claimed in claim 6, it is characterised in that：Signal processing module is pressure sensitivity resistance by cabling
Electric signal is provided, any four pressure sensitivity resistance forms Wheatstone bridge to detect pressure size.
8. pressure-sensing module as claimed in claim 1, it is characterised in that：The multiple pressure sensitivity resistance is defined as multiple matrixes
Formula is arranged in the pressure sensitivity resistance group on the surface of the substrate, and each pressure sensitivity resistance group includes two adjacent institutes in a second direction
State pressure sensitivity resistance, two pressure sensitivity resistance groups of arbitrary neighborhood form a Wheatstone bridge to detect pressure size on first direction, the
One of which in one direction and second direction is the horizontal arragement direction of pressure sensitivity resistor matrix formula arrangement, and another one is arranged for longitudinal direction
Cloth direction.
9. pressure-sensing module as claimed in claim 8, it is characterised in that：The two pressure sensitivity electricity that each pressure sensitivity resistance group includes
Hinder for the first pressure sensitivity resistance and the second pressure sensitivity resistance, the first pressure sensitivity resistance and the second pressure sensitivity resistance be respectively provided with relative first end and
Second end, the first end of the first pressure sensitivity resistance connect with the first end of the second pressure sensitivity resistance and form an output end at the end, the
Second end of one pressure sensitivity resistance connects the first cabling, and the second end of the second pressure sensitivity resistance connects the second cabling, multiple pressure sensitivity resistance
First cabling of the first pressure sensitivity resistance of group is conllinear, and the second cabling of the second pressure sensitivity resistance of multiple pressure sensitivity resistance groups is mutually only
It is vertical, when two pressure sensitivity resistance groups of arbitrary neighborhood form Wheatstone bridge on first direction, the output end of the two pressure sensitivity resistance group
Form the output end of the Wheatstone bridge.
10. pressure-sensing module as claimed in claim 9, it is characterised in that：Further comprise a signal processing module, it is described
Signal processing module provides electric signal so that the first cabling is connected to VDD for the pressure sensitivity resistance group, and the second cabling is connected to
GND；Or first cabling be connected to GND, the second cabling is connected to VDD.
11. pressure-sensing module as claimed in claim 8, it is characterised in that：Two pressure sensitivity that each pressure sensitivity resistance group includes
Resistance is the first pressure sensitivity resistance and the second pressure sensitivity resistance, and the first pressure sensitivity resistance and the second pressure sensitivity resistance are respectively provided with relative first end
With the second end, the first end of the first pressure sensitivity resistance connects with the first end of the second pressure sensitivity resistance and forms an output end at the end,
Second end of the first pressure sensitivity resistance connects the first cabling, and the second end of the second pressure sensitivity resistance connects the second cabling, multiple pressure sensitivity electricity
First cabling of the first pressure sensitivity resistance of resistance group is separate, the second cabling phase of the second pressure sensitivity resistance of multiple pressure sensitivity resistance groups
It is mutually independent, when two pressure sensitivity resistance groups of arbitrary neighborhood form Wheatstone bridge on first direction, the two pressure sensitivity resistance group it is defeated
Go out the output end that end forms the Wheatstone bridge.
12. pressure-sensing module as claimed in claim 11, it is characterised in that：Further comprise a signal processing module, institute
Signal processing module is stated as the first cabling and the second cabling provides electric signal so that the one of the first cabling and the second cabling connects
To VDD, another one is connected to GND.
13. contactor control device, including one is used for the touch control electrode layer of detecting position of touch, it is characterised in that：The contactor control device enters
One step includes the pressure-sensing module described in just like claim any one of 1-12, and the pressure-sensing module is arranged on touch-control electricity
Pole layer side.
14.OLED display devices, it is characterised in that：Feeling of stress including an oled layer and as described in claim any one of 1-12
Module is surveyed, the pressure-sensing module is arranged on oled layer side.
15. OLED display as claimed in claim 14, it is characterised in that：The pressure-sensing module is arranged on oled layer
Surface.
16. OLED display as claimed in claim 14, it is characterised in that：Between oled layer and the pressure-sensing module
A screen layer and insulating barrier are provided with, the insulating barrier is arranged between screen layer and pressure-sensing module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720485772.8U CN206741459U (en) | 2017-05-04 | 2017-05-04 | Pressure-sensing module, contactor control device and OLED display |
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| CN201720485772.8U CN206741459U (en) | 2017-05-04 | 2017-05-04 | Pressure-sensing module, contactor control device and OLED display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106951127A (en) * | 2017-05-04 | 2017-07-14 | 宸鸿科技(厦门)有限公司 | Pressure-sensing module, contactor control device and OLED display |
| CN109144310A (en) * | 2018-07-19 | 2019-01-04 | 武汉华星光电半导体显示技术有限公司 | Pressure sensitivity touch module and preparation method thereof |
-
2017
- 2017-05-04 CN CN201720485772.8U patent/CN206741459U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106951127A (en) * | 2017-05-04 | 2017-07-14 | 宸鸿科技(厦门)有限公司 | Pressure-sensing module, contactor control device and OLED display |
| CN109144310A (en) * | 2018-07-19 | 2019-01-04 | 武汉华星光电半导体显示技术有限公司 | Pressure sensitivity touch module and preparation method thereof |
| WO2020015244A1 (en) * | 2018-07-19 | 2020-01-23 | 武汉华星光电半导体显示技术有限公司 | Pressure sensing touch control module and production method therefor |
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