CN107797702A - Pressure sensor, display panel and display device - Google Patents
Pressure sensor, display panel and display device Download PDFInfo
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- CN107797702A CN107797702A CN201710983563.0A CN201710983563A CN107797702A CN 107797702 A CN107797702 A CN 107797702A CN 201710983563 A CN201710983563 A CN 201710983563A CN 107797702 A CN107797702 A CN 107797702A
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- wheatstone bridge
- pressure sensor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of pressure sensor, display panel and display device.The pressure sensor includes, at least one Wheatstone bridge group, in same Wheatstone bridge group, any Wheatstone bridge shares a resistance with least one other Wheatstone bridge, and shares the power supply signal input and induced signal measurement end being connected with shared resistance；Each Wheatstone bridge for forming same Wheatstone bridge group only is connected to form network structure by way of sharing resistance mutually with other Wheatstone bridges and sharing the power supply signal input and induced signal measurement end that are connected with shared resistance.Compared with existing pressure sensor, pressure sensor provided in an embodiment of the present invention has higher touch-control pressure detecting precision, and forms the resistance and signal wire negligible amounts of the pressure sensor.
Description
Technical field
The present embodiments relate to touch technology, more particularly to a kind of pressure sensor, display panel and display device.
Background technology
At present, display panel is widely used in mobile phone, tablet personal computer, the electronics such as information enquiry machine in public place hall
In equipment.So, the mark that user need to be only touched with finger on the electronic equipment can be realized as the operation to the electronic equipment,
Dependence of the user to other input equipments (such as keyboard and mouse) is eliminated, makes man-machine interaction more simple.
In order to preferably meet user's request, generally it is additionally provided with display panel and touches display surface for detecting user
The pressure sensor of touch-control pressure size during plate, to enrich the application of touch technology.In existing pressure sensor often
Including multiple Wheatstone bridges, to strengthen the accuracy of detection of pressure sensor.In actual setting, per one favour stone of increase more
Electric bridge, it is necessary to 4 resistance of increase and 4 signal wires more.The undoubtedly number of Wheatstone bridge included in pressure sensor
More, the number of the resistance of pressure sensor is more, and the bar number of the signal wire to match with the pressure sensor is more, and pressure passes
The layout difficulty of sensor is bigger.
The content of the invention
The present invention provides a kind of pressure sensor, display panel and display device, is ensuring pressure sensing utensil to realize
On the premise of having higher accuracy of detection, the purpose of the layout difficulty of pressure sensor is reduced.
In a first aspect, the embodiments of the invention provide a kind of pressure sensor, the pressure sensor includes：
At least one Wheatstone bridge group, the Wheatstone bridge group include at least two Wheatstone bridges；
The Wheatstone bridge includes four resistance, two power supply signal inputs and two induced signal measurement ends；
Four resistance is first resistor, second resistance, 3rd resistor and the 4th resistance；
Described two power supply signal inputs are the first power supply signal input and second source signal input part；
Described two induced signal measurement ends are the first induced signal measurement end and the second induced signal measurement end；
The first end of the first resistor and the first end of the 4th resistance and first power supply signal input
Electrical connection, the second end of the first resistor and the first end of the second resistance and the first induced signal measurement end electricity
Connection, the second end of the 4th resistance and the first end of the 3rd resistor are electrically connected with the second induced signal measurement end
Connect, the second end of the second resistance and the second end of the 3rd resistor are electrically connected with the second source signal input part
Connect；
First power supply signal input and the second source signal input part are used for input offset voltage signal；Institute
State the first induced signal measurement end and the second induced signal measurement end is used to export pressure sensitivity detection signal；
In the same Wheatstone bridge group, any Wheatstone bridge and at least one other Wheatstone bridge
A resistance is shared, and shares the power supply signal input and induced signal measurement end being connected with the shared resistance；
Each Wheatstone bridge of the same Wheatstone bridge group is formed only by mutual with other Wheatstone bridges
Share resistance and share the mode of the power supply signal input being connected with the shared resistance and induced signal measurement end
Connection forms network structure.
Second aspect, the embodiment of the present invention additionally provide a kind of display panel, the display panel include underlay substrate and
Form the pressure sensor on the underlay substrate；The pressure sensor is any one pressure provided in an embodiment of the present invention
Force snesor.
The third aspect, the embodiment of the present invention additionally provide a kind of display device, and the display device includes the embodiment of the present invention
Any one display panel provided.
The embodiment of the present invention is by setting in same Wheatstone bridge group, any Wheatstone bridge and at least one other favour
Stone electric bridge shares a resistance, and shares the power supply signal input being connected with shared resistance and induced signal measurement
End；Each Wheatstone bridge of same Wheatstone bridge group is formed only by sharing resistance mutually with other Wheatstone bridges and being total to
It is connected to form network structure with the power supply signal input and the mode of induced signal measurement end being connected with shared resistance, it is real
Matter is on the basis of Wheatstone bridge number in ensuring Wheatstone bridge group is constant, is reduced needed for the Wheatstone bridge group
The number of resistance, and the bar number of matching signal wire, solves resistance and signal wire in existing pressure sensor
Large number of, the problem of layout difficulty of pressure sensor is big, realizing is ensuring that pressure sensor has higher detection essence
On the premise of degree, the purpose of the layout difficulty of pressure sensor is reduced.
Brief description of the drawings
Fig. 1 is a kind of existing structural representation of pressure sensor；
Fig. 2 is a kind of structural representation of first sharing structure provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of second sharing structure provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another second sharing structure provided in an embodiment of the present invention；
Fig. 5 is a kind of structural representation of 3rd sharing structure provided in an embodiment of the present invention；
Fig. 6 is the structural representation of another 3rd sharing structure provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of pressure sensor provided in an embodiment of the present invention；
Fig. 8 is the structural representation of another pressure sensor provided in an embodiment of the present invention；
Fig. 9 is the structural representation of another pressure sensor provided in an embodiment of the present invention；
Figure 10 is the structural representation of another pressure sensor provided in an embodiment of the present invention；
Figure 11 is the structural representation of another pressure sensor provided in an embodiment of the present invention；
Figure 12 is a kind of structural representation of Wheatstone bridge provided in an embodiment of the present invention；
Figure 13 is the structural representation of another Wheatstone bridge provided in an embodiment of the present invention；
Figure 14 is a kind of structural representation of display panel provided in an embodiment of the present invention；
Figure 15 is the structural representation of another pressure sensor provided in an embodiment of the present invention；
Figure 16 is a kind of existing structural representation of display panel；
Figure 17 is a kind of structural representation of display device provided in an embodiment of the present invention.
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 limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Fig. 1 is a kind of existing structural representation of pressure sensor.Referring to Fig. 1, the pressure sensor includes two favours
Stone electric bridge 10, each Wheatstone bridge 10 include：First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, the first power supply signal input Vin1, second source signal input part Vin2, the first induced signal measurement end Vout1 and
Two induced signal measurement end Vout2.First resistor R1 first end a1 and the 4th resistance R4 first end d1 and the first power supply
Signal input part Vin1 is electrically connected, and first resistor R1 the second end a2 and second resistance R2 first end b1 and the first sensing are believed
Number measurement end Vout1 electrical connection, the 4th resistance R4 the second end d2 and 3rd resistor R3 first end c1 and the second sensing letter
Number measurement end Vout2 electrical connection, second resistance R2 the second end b2 and 3rd resistor R3 the second end c2 and second source are believed
Number input Vin2 electrical connection；First power supply signal input Vin1 and second source signal input part Vin2 is used to pass to pressure
Sensor input offset voltage signal；First induced signal measurement end Vout1 and the second induced signal measurement end Vout2 is used for from pressure
Force snesor exports pressure sensitivity detection signal.
For each Wheatstone bridge 10, when to the first power supply signal input Vin1 and second source signal input part
During Vin2 input offset voltage signals, each branch road has electric current to pass through in Wheatstone bridge.Now, pressing includes the pressure sensing
During the display panel of device, pressure sensor because by display panel corresponding opening position shearing force acted on, first
Resistance R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistances change, so that the first of pressure sensor
The absolute value delta V=of the difference of the electric signal of induced signal measurement end Vout1 and the second induced signal measurement end Vout2 outputs |
Vout1-Vout2 | the pressure sensitivity detection signal Δ V of pressure sensor is different when (i.e. pressure sensitivity detection signal) is from without pressing.Continue to join
See Fig. 1, if pressure sensor includes two Wheatstone bridges 10, the pressure sensitivity detection signal that left side Wheatstone bridge 10 exports is set
For Δ V1 ', the pressure sensitivity detection signal that right side Wheatstone bridge 10 exports is set to Δ V2 ', calculates Δ V1 ' and Δ V2 '.According to Δ
V1 ' and Δ V2 ', it may be determined that the size of touch-control pressure.
It can be seen from Fig. 1 each Wheatstone bridge include 4 resistance (i.e. first resistor R1, second resistance R2,
3rd resistor R3 and the 4th resistance R4) and need 4 signal wire (not shown in figure 1)s respectively with the first power supply signal input
Vin1, second source signal input part Vin2, the first induced signal measurement end Vout1 and the second induced signal measurement end Vout2
It is connected.If a pressure sensor includes N number of Wheatstone bridge, then, a pressure sensor includes 4N resistance, and needs
To be that the pressure sensor sets 4N signal lines.Undoubtedly the number of Wheatstone bridge included in pressure sensor is more,
The number of the resistance of pressure sensor is more, and the bar number of the signal wire to match with the pressure sensor is more, pressure sensor
Layout difficulty it is bigger.
In view of this, the invention provides a kind of pressure sensor, the pressure sensor to include：At least one favour stone electricity
Bridge group, Wheatstone bridge group include at least two Wheatstone bridges；It is defeated that Wheatstone bridge includes four resistance, two power supply signals
Enter end and two induced signal measurement ends；Four resistance are first resistor, second resistance, 3rd resistor and the 4th resistance；
Two power supply signal inputs are the first power supply signal input and second source signal input part；Two induced signal measurement ends
For the first induced signal measurement end and the second induced signal measurement end；The first end of the first end of first resistor and the 4th resistance
Electrically connected with the first power supply signal input, the second end of first resistor and the first end of second resistance and the first induced signal
Measurement end electrically connects, and the second end of the 4th resistance and the first end of 3rd resistor electrically connect with the second induced signal measurement end,
Second end of second resistance and the second end of 3rd resistor electrically connect with second source signal input part；First power supply signal is defeated
Enter end and second source signal input part is used for input offset voltage signal；First induced signal measurement end and the second induced signal
Measurement end is used to export pressure sensitivity detection signal.
In same Wheatstone bridge group, any Wheatstone bridge shares an electricity with least one other Wheatstone bridge
Resistance, and share the power supply signal input and induced signal measurement end being connected with shared resistance；Form same favour stone
Each Wheatstone bridge of electric bridge group is only by sharing mutually resistance with other Wheatstone bridges and sharing and shared resistance
Connected power supply signal input connects to form network structure with the mode of induced signal measurement end.
In the above-mentioned technical solutions, by setting any Wheatstone bridge to share one with least one other Wheatstone bridge
Individual resistance, then the power supply signal input and induced signal measurement end at the resistance both ends also can accordingly share, and can subtract
The quantity of resistance in few pressure sensor, and the quantity for the signal wire being connected with the pressure sensor.An if pressure sensing
Device includes a Wheatstone bridge group, and the Wheatstone bridge group includes two Wheatstone bridges, and composition one is simplest netted
Structure.Wherein, the two Wheatstone bridges share a resistance, and share the power supply signal input that resistance electrically connects with this
Also shared with induced signal measurement end, then, the Wheatstone bridge group includes 4 × 2-1=7 resistance, needs 4 × 2- of setting altogether
2=6 signal lines are connected with the pressure sensor.And existing pressure sensor (pressure sensor provided in such as Fig. 1), though
So equally include two Wheatstone bridges, but include 8 resistance altogether, and need to set 8 signal lines and the pressure sensing
Device is connected.Obviously compared with existing pressure sensor, favour stone electricity of the pressure sensor provided by the invention included by it
In the case that bridge number is constant, it is possible to reduce form the number of the resistance needed for the pressure sensor, and matching letter
The bar number of number line, solve the large number of of resistance and signal wire in existing pressure sensor, the laying of pressure sensor is difficult
The problem of big is spent, realizes on the premise of ensuring that pressure sensor has higher accuracy of detection, reduces pressure sensor
The purpose of layout difficulty.
Formed on the basis of the various embodiments described above, in pressure sensor same Wheatstone bridge group Wheatstone bridge it
Between form at least one of following structures mutually：First sharing structure, the second sharing structure and the 3rd sharing structure.Wherein,
In one sharing structure, the power supply signal input and induced signal measurement end that are connected with shared resistance are by two favour stones
Electric bridge shares；In second sharing structure, the power supply signal input or induced signal measurement end quilt that are connected with shared resistance
Three Wheatstone bridges share；In 3rd sharing structure, the power supply signal input or sensing letter that are connected with shared resistance
Number measurement end is shared by four Wheatstone bridges.
Technical scheme provided by the invention is described in detail with reference to schematic diagram.In order to clearly show that favour in figure
The power supply signal input and induced signal measurement end of stone electric bridge group, the present invention is in each Figure of description by power supply signal
Input is represented with hollow dots, and induced signal measurement end is represented with solid dot.
Fig. 2 is a kind of structural representation of first sharing structure provided in an embodiment of the present invention., alternatively, should referring to Fig. 2
First sharing structure is formed by the first Wheatstone bridge 11 and the second Wheatstone bridge 12, the electricity being connected with shared resistance R0
Source signal input and induced signal measurement end are shared by the two Wheatstone bridges.
With continued reference to Fig. 2, the first sharing structure only includes 7 resistance and 6 signal line cans realize 2 favour stone electricity
Function possessed by bridge, and the existing pressure sensor including 2 Wheatstone bridges generally requires 8 resistance and 8 bars
Line.Therefore, compared with the structure of existing pressure sensor, resistance and signal wire can be substantially reduced using the first sharing structure
Quantity.Further, if setting pressure sensor to include at least one first sharing structure, pressure sensing can effectively be reduced
The quantity of resistance in device, and the quantity for the signal wire being connected with the pressure sensor, reduce the layout difficulty of pressure sensor.
Fig. 3 is a kind of structural representation of second sharing structure provided in an embodiment of the present invention., alternatively, should referring to Fig. 3
Second sharing structure is formed by the first Wheatstone bridge 11, the second Wheatstone bridge 12 and the 3rd Wheatstone bridge 13.Wherein, with
Power supply signal input connected shared resistance R0 is shared by these three Wheatstone bridges.Fig. 4 carries for the embodiment of the present invention
The structural representation of the sharing structure of another kind second of confession.Compared with the second sharing structure provided in Fig. 3, difference is, Fig. 4
In shared with the shared resistance R0 induced signal measurement ends being connected by these three Wheatstone bridges.
With continued reference to Fig. 3 and Fig. 4, the second sharing structure includes only needing 10 resistance and 8 signal line cans to realize 3
Function possessed by individual Wheatstone bridge, and 12 resistance are needed in the existing pressure sensor including 3 Wheatstone bridges
With 12 signal lines.Therefore, compared with the structure of existing pressure sensor, electricity can be substantially reduced using the second sharing structure
Resistance and the quantity of signal wire.Further, if setting pressure sensor to include at least one second sharing structure, can effectively subtract
The quantity of resistance in few pressure sensor, and the quantity for the signal wire being connected with the pressure sensor, reduce pressure sensor
Layout difficulty.
Fig. 5 is a kind of structural representation of 3rd sharing structure provided in an embodiment of the present invention., alternatively, should referring to Fig. 5
3rd sharing structure is by the first Wheatstone bridge 11, the second Wheatstone bridge 12, the 3rd Wheatstone bridge 13 and the 4th favour stone
Electric bridge 14 is formed.Shared with the power supply signal input that shared resistance R0 is connected by this four Wheatstone bridges.Fig. 6 is this
The structural representation for the sharing structure of another kind the 3rd that inventive embodiments provide.Compared with the 3rd sharing structure provided in Fig. 5,
Difference is, is shared in Fig. 6 with the induced signal measurement end that shared resistance R0 is connected by this four Wheatstone bridges.
Similarly, with continued reference to Fig. 5 and Fig. 6, the 3rd sharing structure includes only needing 12 resistance and 9 signal lines can
To realize function possessed by 4 Wheatstone bridges, and 16 are needed in the existing pressure sensor including 4 Wheatstone bridges
Individual resistance and 16 signal lines.Therefore, can be notable using the 3rd sharing structure compared with the structure of existing pressure sensor
Reduce the quantity of resistance and signal wire.Further, can be with if setting pressure sensor to include at least one 3rd sharing structure
The quantity of resistance in pressure sensor, and the quantity for the signal wire being connected with the pressure sensor are effectively reduced, reduces pressure
The layout difficulty of sensor.
Further, if according to existing pressure sensor wherein Wheatstone bridge connection method, 12 resistance are only capable of
Form 3 Wheatstone bridges.And technical scheme in Fig. 5 and Fig. 6 is used, 4 Wheatstone bridges can be formed.Due to actually setting
In putting, the quantity of the Wheatstone bridge included by pressure sensor is more, and the pressure sensitivity detection performance of pressure sensor is better, therefore
Compared with existing Wheatstone bridge layout scheme, the pressure sensitivity detection performance for the pressure sensor that the application provides is more preferable.
, can be as needed in actual design, set a Wheatstone bridge group in pressure sensor to include m the
One sharing structure, n the second sharing structures and p the 3rd sharing structures, wherein, m, n, p are whole more than or equal to zero
Number, and m, n with during p differences be 0.The structure of typical pressure sensor is described in detail below, but not formed to this hair
Bright limitation.
Fig. 7 is a kind of structural representation of pressure sensor provided in an embodiment of the present invention.Referring to Fig. 7, alternatively, the pressure
Force snesor includes a Wheatstone bridge group, and the Wheatstone bridge group includes N-1 the first sharing structures, the N-1
Individual first sharing structure is formed by N number of Wheatstone bridge, wherein, N is the natural number more than 1.Wherein, the first Wheatstone bridge 11
First sharing structure is formed with the second Wheatstone bridge 12, i.e. the 4th resistance R4 in the first Wheatstone bridge 11 is used simultaneously
The 4th resistance R4 as the second Wheatstone bridge 12.Second Wheatstone bridge 12 and the 3rd Wheatstone bridge form one first
Second resistance R2 in sharing structure, i.e. the second Wheatstone bridge 12 is used as the second resistance of the 3rd Wheatstone bridge simultaneously
R2 ... ....
With continued reference to Fig. 7, because the pressure sensor co-exists in N-1 the first sharing structures.The pressure sensor includes
3N+1 resistance, and need to set 2N+2 signal lines with the pressure sensor to be connected.It is and existing including N number of favour stone electricity
The pressure sensor of bridge includes 4N resistance, and needs 4N signal lines to be connected with the pressure sensor.Obviously with it is existing
The pressure sensor including N number of Wheatstone bridge in compare, the pressure sensor provided in Fig. 7 can reduce by N-1 resistance
With 2N-2 signal lines, the purpose of the layout difficulty of pressure sensor is reduced.
Fig. 8 is the structural representation of another pressure sensor provided in an embodiment of the present invention.Referring to Fig. 8, the pressure passes
One Wheatstone bridge group of sensor only includes 1, second sharing structure 2 of first sharing structure and one the 3rd shares
Structure 3.Wherein, first first Wheatstone bridge of the first row, second Wheatstone bridge of the first row, the second row favour stone electricity
Second Wheatstone bridge of bridge and the second row collectively forms the 3rd sharing structure 3.Second Wheatstone bridge of row first,
Second Wheatstone bridge of row second and the third line Wheatstone bridge collectively form second sharing structure 2.The third line favour
Stone electric bridge and fourth line Wheatstone bridge collectively form first sharing structure 1.
With continued reference to Fig. 8, the pressure sensor includes 6 Wheatstone bridges, including 18 resistance altogether, and needs to set
13 signal lines are connected with the pressure sensor.And the existing pressure sensor including 6 Wheatstone bridges includes 24
Resistance, and need 24 signal lines to be connected with the pressure sensor.Obviously with the existing pressure for including 6 Wheatstone bridges
Compared in sensor, the pressure sensor provided in Fig. 8 can reduce 6 resistance and 11 signal lines, and then ensure
On the premise of pressure sensor has higher touch-control pressure detecting precision, the purpose of the layout difficulty of pressure sensor is reduced.
Further, if according to existing pressure sensor wherein Wheatstone bridge connection method, 18 resistance are only capable of
Form 4 Wheatstone bridges.And technical scheme in Fig. 8 is used, 6 Wheatstone bridges can be formed, it is clear that so setting can be with
Improve the pressure sensitivity detection performance of pressure sensor.
Further, the quantity (being more than or equal to 4) of the Wheatstone bridge included by a Wheatstone bridge group is considered really
On the premise of fixed, comprising the 3rd sharing structure it is more compared with the quantity of the first sharing structure or the second sharing structure, form the favour
The quantity of the resistance of stone electric bridge group is fewer, and the quantity of required signal wire is fewer, and alternatively, Wheatstone bridge group is included extremely
Few P Wheatstone bridge, wherein P are conjunction number；Form each Wheatstone bridge and three other favours of same Wheatstone bridge group
Stone electric bridge forms the 3rd sharing structure.Wherein, close number be exactly in addition to can be by 1 or itself, can also be whole by other numbers
Remove.Fig. 9 is the structural representation of another pressure sensor provided in an embodiment of the present invention.Exemplarily, should referring to Fig. 9
Wheatstone bridge group includes A × B Wheatstone bridge, and A and B are the positive integer more than or equal to 2, and each favour stone electricity
Bridge and three other Wheatstone bridges form the 3rd sharing structure.
Figure 10 is the structural representation of another pressure sensor provided in an embodiment of the present invention.Referring to Figure 10, the pressure
In sensor, Wheatstone bridge group includes 4 Wheatstone bridges, respectively the first Wheatstone bridge 11, the second Wheatstone bridge
12nd, the 3rd Wheatstone bridge 13 and the 4th Wheatstone bridge 14；4th resistance R4 of the electric bridge of the first favour stone 11 and the second favour this
The first resistor R1 of energization bridge 12 is shared；4th resistance R4 of the second Wheatstone bridge 12 and the first of the 3rd Wheatstone bridge 13
Resistance R1 is shared；4th resistance R4 of the 3rd Wheatstone bridge 13 and the first resistor R1 of the 4th Wheatstone bridge 14 are shared；The
4th resistance R4 of four Wheatstone bridges 14 and the first resistor R1 of the first Wheatstone bridge 11 are shared.
To share first input end T1 of the power supply signal input as the Wheatstone bridge group by this four Wheatstone bridges,
I.e. using the first power supply signal input Vin1 of four Wheatstone bridges as first input end T1, with each Wheatstone bridge not
Shared power supply signal input is the second input T2 of the Wheatstone bridge group, i.e. the four of the Wheatstone bridge group the
Two power supply signal input Vin2 are used as the second input T2.With by the first Wheatstone bridge 11 and the second Wheatstone bridge 12
Shared induced signal measurement end is the first output end X1 (i.e. the second induced signal measurement ends of the first Wheatstone bridge 11
First induced signal measurement end Vout1 of Vout2 and the second Wheatstone bridge 12 is collectively as the first output end X1), with by
The shared induced signal measurement end of two Wheatstone bridges 12 and the 3rd Wheatstone bridge 13 for the second output end X2 (i.e. the second favour this
Second induced signal measurement end Vout2 of energization bridge 12 and the first induced signal measurement end Vout1 of the 3rd Wheatstone bridge 13
Collectively as the second output end X2), to be surveyed by the shared induced signal of the 3rd Wheatstone bridge 13 and the 4th Wheatstone bridge 14
Amount end is the 3rd output end X3 (i.e. the second induced signal measurement end Vout2 of the 3rd Wheatstone bridge 13 and the 4th favour stone electricity
First induced signal measurement end Vout2 of bridge 14 is collectively as the 3rd output end X3), with by the 4th Wheatstone bridge 14 and first
The shared induced signal measurement end of Wheatstone bridge 11 is the 4th output end X4 (i.e. the second sensing letters of the 4th Wheatstone bridge 14
First induced signal measurement end Vout1 of number measurement end Vout2 and the first Wheatstone bridge 11 is collectively as the 4th output end
X4)。
When carrying out touch-control pressure detecting, to first input end T1 input electrical signal Vx1, inputted to individual second input T2
Electric signal Vx2, and | Vx1-Vx2 | ≠ 0.Now, each branch road of each Wheatstone bridge has electric current to flow through.The output of detection first
Hold X1 electric signal V1, the second output end X2 electric signal V2, the 3rd output end X3 electric signal V3, the 4th output end X4 electricity
Signal V4.Then the pressure sensitivity detection signal of the first Wheatstone bridge 11 is Δ V1=| V1-V4 |.The pressure sensitivity of second Wheatstone bridge 12
Detection signal is Δ V2=| V1-V2 |.The pressure sensitivity detection signal of 3rd Wheatstone bridge 13 is Δ V3=| V2-V3 |.4th favour
The pressure sensitivity detection signal of stone electric bridge 14 is Δ V4=| V3-V4 |.And the pressure sensitivity detection letter of the output based on each Wheatstone bridge
Number Δ V1, Δ V2, Δ V3 and Δ V4, obtain touch-control pressure size.
Figure 11 is the structural representation of another pressure sensor provided in an embodiment of the present invention.Referring to Figure 11, the pressure
In sensor, Wheatstone bridge group includes four Wheatstone bridges, respectively the first Wheatstone bridge 11, the second Wheatstone bridge
12nd, the 3rd Wheatstone bridge 13 and the 4th Wheatstone bridge 14.Wherein, the 3rd resistor R3 and second of the first Wheatstone bridge 11
The second resistance R2 of Wheatstone bridge 12 is shared；The first resistor R1 of second Wheatstone bridge 12 and the 3rd Wheatstone bridge 13
4th resistance R4 is shared；The 3rd resistor R3 of 3rd Wheatstone bridge 13 and the second resistance R2 of the 4th Wheatstone bridge 14 are total to
With；4th resistance R4 of the first resistor R1 of the 4th Wheatstone bridge 14 and the first Wheatstone bridge 11 is shared.
To share first output end T1 of the induced signal measurement end as the Wheatstone bridge group by this four Wheatstone bridges,
I.e. by the second induced signal measurement end Vout2 of the first Wheatstone bridge 11 and the 3rd Wheatstone bridge 13, the second favour stone electricity
First induced signal measurement end Vout1 of the Wheatstone bridge 14 of bridge 12 and the 4th is collectively as the first output end X1.With the first favour
First induced signal measurement end Vout1 of stone electric bridge 11 is as the second output end X2, with the second of the second Wheatstone bridge 12
Induced signal measurement end Vout2 is as the 3rd output end X3, with the first induced signal measurement end of the 3rd Wheatstone bridge 13
Vout1 is used as the 5th output as the 4th output end X4 using the second induced signal measurement end Vout2 of the 4th Wheatstone bridge 14
Hold X5.With the power supply signal input shared by the first Wheatstone bridge 11 and the second Wheatstone bridge 12, and by the 3rd favour
The shared power supply signal input of the Wheatstone bridge 14 of stone electric bridge 13 and the 4th is as first input end T1.With by the second favour this
The shared power supply signal input of the Wheatstone bridge 13 of energization bridge 12 and the 3rd, and by the 4th Wheatstone bridge 14 and the first favour
The shared power supply signal input of stone electric bridge 11 is as the second input T2.
When carrying out touch-control pressure detecting, to first input end T1 input electrical signal Vx1, inputted to individual second input T2
Electric signal Vx2, and | Vx1-Vx2 | ≠ 0.Now, each branch road of each Wheatstone bridge has electric current to flow through.The output of detection first
Hold X1 electric signal V1, the second output end X2 electric signal V2, the 3rd output end X3 electric signal V3, the 4th output end X4 electricity
Signal V4, and the 5th output end X5 electric signal V5.Then the pressure sensitivity detection signal of the first Wheatstone bridge 11 is Δ V1=|
V2-V1|.The pressure sensitivity detection signal of second Wheatstone bridge 12 is Δ V2=| V3-V1 |.The pressure sensitivity inspection of 3rd Wheatstone bridge 13
Survey signal is Δ V3=| V4-V1 |.The pressure sensitivity detection signal of 4th Wheatstone bridge 14 is Δ V4=| V5-V1 |.And based on each
Pressure sensitivity detection signal Δ V1, Δ V2, Δ V3 and the Δ V4 of the output of Wheatstone bridge, obtain touch-control pressure size.
In the above-mentioned technical solutions, the set-up mode of each Wheatstone bridge can have many kinds, below just wherein several allusion quotations
The structure of the Wheatstone bridge of type illustrates, but does not form the restriction to the application.Alternatively, Figure 12 is implemented for the present invention
A kind of structural representation for Wheatstone bridge that example provides.Referring to Figure 12, in same Wheatstone bridge, first resistor R1, second
Resistance R2,3rd resistor R3 and the 4th resistance R4 shape are cuboid；First resistor R1 is by first end a1 to the second end
A2 line is parallel by first end c1 to the second end c2 line with 3rd resistor R3, and second resistance R2 is by first end b1 to second
Hold b2 line parallel by first end d1 to the second end d2 line with the 4th resistance R4；First resistor R1 is by first end a1 to
Two end a2 line is intersected with second resistance R2 by first end b1 to the second end b2 line.This setting can cause first resistor
The direction of R1 sensing strains is different from the direction of second resistance R2 sensing strains, the direction and the 3rd of the 4th resistance R4 sensing strains
The direction of resistance R3 sensing strains is different, can be by first resistor R1, second resistance R2, and 3rd resistor R3 and the 4th resistance
R4 is distributed in space same place or closely located position, so that first resistor R1 and second resistance R2, and the 3rd
Resistance R3 and the 4th resistance R4 have pulling temperature change, eliminate the influence of temperature difference, improve pressure sensitive precision.And this
Sample, which is set, can make it that wheatstone bridge configuration is simple, be easy to lay.
Figure 13 is the structural representation of another Wheatstone bridge provided in an embodiment of the present invention.Referring to Figure 13, the favour this
Energization bridge includes first direction 100 and the second direction 200 intersected with first direction 100；In same Wheatstone bridge, the first electricity
Hindering R1, the component on 100 is more than in second direction 200 in a first direction by first end a1 to the second end a2 development length
Component, second resistance R2 are more than first by component of first end b1 to the second end b2 development length in second direction 200
Component on direction 100,3rd resistor R3 by first end c1 to the second end c2 the development length component on 100 in a first direction
More than the component in second direction 200, the 4th resistance R4 is by first end d1 to the second end d2 development length in second direction
Component on 200 is more than the component in a first direction on 100.
The strain of first resistor R1 and 3rd resistor R3 the first bearing of trends 100 of sensing can be caused by so setting, second
The strain of resistance R2 and the 4th resistance R4 sensing second directions 200.Direction and the second electricity due to first resistor R1 sensing strains
The direction difference of R2 sensing strains is hindered, the direction that the direction that the 4th resistance R4 senses strain strains with 3rd resistor R3 sensings is not
Together, first resistor R1, second resistance R2, and 3rd resistor R3 and the 4th resistance R4 can be distributed in space same place or
Closely located position, so that first resistor R1 and second resistance R2, and 3rd resistor R3 and the 4th resistance R4 have together
Temperature change is walked, the influence of temperature difference is eliminated, improves pressure sensitive precision.
Alternatively, in above-mentioned each technical scheme, form Wheatstone bridge each resistance material for amorphous silicon material or
Polycrystalline silicon material.Because the ga(u)ge factor of amorphous silicon material or polycrystalline silicon material is bigger than other materials.Structure is set
Material into each resistance of Wheatstone bridge is amorphous silicon material or polycrystalline silicon material, and it is higher can make it that pressure sensor has
Pressure detecting sensitivity.
Alternatively, in same Wheatstone bridge, the ratio between resistance R1 and second resistance R2 resistance of first resistor is equal to the
The ratio between four resistance R4 resistance and 3rd resistor R3 resistance.The benefit so set is to apply biasing on Wheatstone bridge
Voltage signal, and first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance meet the feelings of above-mentioned relation
Under condition, during no pressing, the partial pressure on first resistor R1 is identical with the partial pressure on the 4th resistance R4, partial pressure on second resistance R2 and
Partial pressure on 3rd resistor R3 is identical.Pressure sensor the first induced signal measurement end Vout1 current potential and the second induced signal
Measurement end Vout2 voltage is equal, the first induced signal measurement end Vout1 and the second induced signal measurement end Vout2 output
Pressure sensitivity detection signal is 0.During pressing, the pressure sensitivity detection signal of pressure sensor output is equal to pressure sensor output before and after pressing
Pressure sensitivity change in detection signal amount.So be advantageous to simplify the calculating process of touch-control pressure value, reduction display panel is according to touch-control
Pressure size performs the response time of respective operations.
The embodiment of the present invention also provides a kind of display panel.Figure 14 is a kind of display panel provided in an embodiment of the present invention
Structural representation.Referring to Figure 14, the display panel includes underlay substrate 500 and forms the pressure sensor on underlay substrate
560；The pressure sensor 560 is any one pressure sensor provided in an embodiment of the present invention.
Display panel provided in an embodiment of the present invention, set in same Wheatstone bridge group, any Wheatstone bridge with extremely
Few other Wheatstone bridges share a resistance, and share the power supply signal input being connected with shared resistance and
Induced signal measurement end；Each Wheatstone bridge of same Wheatstone bridge group is formed only by common mutually with other Wheatstone bridges
Shape is connected with resistance and the mode for sharing the power supply signal input being connected with shared resistance and induced signal measurement end
Structure is reticulated, is substantially on the basis of Wheatstone bridge number in ensuring Wheatstone bridge group is constant, reduces the favour stone
The number of resistance needed for electric bridge group, and the bar number of matching signal wire, are solved in existing pressure sensor
Large number of, the problem of layout difficulty of pressure sensor is big of resistance and signal wire, realizing is ensuring pressure sensing utensil
On the premise of having higher accuracy of detection, the purpose of the layout difficulty of pressure sensor is reduced.
With continued reference to Figure 14, the underlay substrate 500 of display panel includes viewing area 510 and around the non-aobvious of viewing area 510
Show area 520.In actual setting, pressure sensor 560 can be arranged in viewing area 510, can also be arranged at non-display area
520.Exemplarily pressure sensor 560 is arranged in non-display area 520 in fig. 14.
Specifically, referring to Figure 14, at least two pressure sensors are provided with the non-display area 520 of underlay substrate 500
560；At least two pressure sensors 560 are respectively positioned at the relative both sides in viewing area 510.Research shows, on a display panel
Pressing position is nearer apart from the position of pressure sensor 560, and the pressure sensitivity detection signal that pressure sensor 560 exports is also bigger.This
Sample is set, and when can to press the optional position of display panel, the pressure sensitivity inspection of at least one pressure sensor output all be present
It is larger to survey signal, can cause display panel that there is preferable pressure sensitivity detection performance.
Further, consider to be often provided with display panel numerous to be used for position of touch detection and image
Simultaneously larger space is not present in component of display etc., display panel, can not using each Wheatstone bridge group of pressure sensor as
One entirety (each resistance for forming pressure sensor closes on setting) is laid on display panel.In actual setting, it is necessary to root
According to the installation position of each component on display panel, the ornaments side of each resistance of each composition pressure sensor is neatly adjusted
Formula, alternatively, each resistance of pressure sensor is put according to mode as shown in figure 15.Pressure sensor in Figure 15
Equivalent circuit diagram is identical with Figure 10.
With continued reference to Figure 14, alternatively, multiple shiftings are provided with the non-display area 520 of the underlay substrate 500 of display panel
Bit register 550, multiple shift registers 550 are respectively positioned at the relative both sides in viewing area 510；Positioned at the same side of viewing area 510
Each shift register 550 be arranged in order along third direction 300, extend along fourth direction 400；Form each electricity of Wheatstone bridge
Resistance is located at at least one in following positions respectively：Between two neighboring shift register 550, shift register 550 close to display
The side in area 510 and shift register 550 deviate from the side of viewing area 510；Wherein, positioned at two neighboring shift register
Resistance between 550 is less than the length in fourth direction 400 in the length of third direction 300；It is close positioned at shift register 550
The resistance of the side of viewing area 510 is more than the length in fourth direction 400 in the length of third direction 300；Positioned at shift LD
Resistance of the device 550 away from the side of viewing area 510 is more than the length in fourth direction 400 in the length of third direction 300；Its
In, third direction 300 and fourth direction 400 are parallel with underlay substrate 500, and third direction 300 is handed over fourth direction 400
Fork.
Figure 16 is a kind of existing structural representation of display panel.Referring to Figure 16, in the display panel, pressure is passed
Sensor 560 is wholy set in display panel non-display area 520 between two neighboring shift register 550.Due to pressure sensing
Device 560 oversized to the set location of shift register 550, it is necessary to be adjusted, and widen shift register 550 and face
The distance Z of boundary line of the nearly edge of viewing area 510 far from viewing area 510 and non-display area 520, so that each shift register 550
Signal output part electrically connected with scan line 14 corresponding in viewing area 510.Undoubtedly, widen shift register 550 to face
The distance Z of boundary line of the nearly edge of viewing area 510 far from viewing area 510 and non-display area 520, the non-aobvious of display panel can be increased
Show the area in area 520.
Compared with the display panel provided in Figure 16, technical scheme forms each electricity of Wheatstone bridge by setting
Resistance is located at at least one in following positions respectively：Between two neighboring shift register 550, shift register 550 close to display
The side in area 510 and shift register 550 deviate from the side of viewing area 510；Wherein, positioned at two neighboring shift register
Resistance between 550 is less than the length in fourth direction 400 in the length of third direction 300；It is close positioned at shift register 550
The resistance of the side of viewing area 510 is more than the length in fourth direction 400 in the length of third direction 300；Positioned at shift LD
Resistance of the device 550 away from the side of viewing area 510 is more than the length in fourth direction 400, essence in the length of third direction 300
It is so that the resistance between two neighboring shift register 550 fully extends on 100 in a first direction, while reduces the electricity
Hinder the length in second direction 200, and cause positioned at shift register 550 close to the side of viewing area 510 resistance the
Fully extend on two directions 200, at the same reduce the resistance in a first direction 100 length.Shift register need not so be adjusted
550 set location, shift register 550 can be reduced and close on the edge of viewing area 510 far from viewing area 510 and non-display area
The distance Z of 520 boundary line, reduce the area of the non-display area 520 of display panel, be adapted with the development trend of narrow frame.
With continued reference to Figure 14, display panel also includes multi-strip scanning line 14, and shift register 550 is swept with least one respectively
Line 540 is retouched to electrically connect；Projection and scanning of the resistance on underlay substrate positioned at shift register 550 close to the side of viewing area
Projection of the line 540 on underlay substrate 500 is misaligned.Consider that the resistance between shift register 550 and viewing area 510 exists
The situation that projection of the projection with scan line 540 on underlay substrate 500 on underlay substrate 500 overlaps, scan line 540 equivalent to
The grid of thin film transistor (TFT), the raceway groove of resistance between shift register 550 and viewing area 510 equivalent to thin film transistor (TFT)
Area, the size of the signal transmitted in scan line 540 can influence being turned on or off for channel region, and then influence pressure sensor 560
Working condition.Therefore, alternatively, the resistance between shift register 550 and viewing area 510 is on underlay substrate 500
Projection of the projection with scan line 540 on underlay substrate 500 it is misaligned.So set and may insure that pressure sensor 560 exists
Working condition is not influenceed by 540 transmission signals of scan line.
The embodiment of the present invention also provides a kind of display device.Figure 17 is a kind of display device provided in an embodiment of the present invention
Structural representation.Referring to Figure 17, the display device 101 includes any one display panel 201 provided in an embodiment of the present invention, should
Display device 101 can be mobile phone, tablet personal computer and intelligent wearable device etc..
Display panel provided in an embodiment of the present invention, set in same Wheatstone bridge group, any Wheatstone bridge with extremely
Few other Wheatstone bridges share a resistance, and share the power supply signal input being connected with shared resistance and
Induced signal measurement end；Each Wheatstone bridge of same Wheatstone bridge group is formed only by common mutually with other Wheatstone bridges
Shape is connected with resistance and the mode for sharing the power supply signal input being connected with shared resistance and induced signal measurement end
Structure is reticulated, is substantially on the basis of Wheatstone bridge number in ensuring Wheatstone bridge group is constant, reduces the favour stone
The number of resistance needed for electric bridge group, and the bar number of matching signal wire, are solved in existing pressure sensor
Large number of, the problem of layout difficulty of pressure sensor is big of resistance and signal wire, realizing is ensuring pressure sensing utensil
On the premise of having higher accuracy of detection, the purpose of the layout difficulty of pressure sensor is reduced.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (14)
- A kind of 1. pressure sensor, it is characterised in that including：At least one Wheatstone bridge group, the Wheatstone bridge group include at least two Wheatstone bridges；The Wheatstone bridge includes four resistance, two power supply signal inputs and two induced signal measurement ends；Four resistance is first resistor, second resistance, 3rd resistor and the 4th resistance；Described two power supply signal inputs are the first power supply signal input and second source signal input part；Described two induced signal measurement ends are the first induced signal measurement end and the second induced signal measurement end；The first end of the first resistor and the first end of the 4th resistance are electrically connected with first power supply signal input Connect, the second end of the first resistor and the first end of the second resistance are electrically connected with the first induced signal measurement end Connect, the second end of the 4th resistance and the first end of the 3rd resistor are electrically connected with the second induced signal measurement end Connect, the second end of the second resistance and the second end of the 3rd resistor are electrically connected with the second source signal input part Connect；First power supply signal input and the second source signal input part are used for input offset voltage signal；Described One induced signal measurement end and the second induced signal measurement end are used to export pressure sensitivity detection signal；In the same Wheatstone bridge group, any Wheatstone bridge shares with least one other Wheatstone bridge One resistance, and share the power supply signal input and induced signal measurement end being connected with the shared resistance；Each Wheatstone bridge of the same Wheatstone bridge group is formed only by being shared mutually with other Wheatstone bridges Resistance and the mode of the shared power supply signal input being connected with the shared resistance and induced signal measurement end are connected Form network structure.
- 2. pressure sensor according to claim 1, it is characterised in thatForm and form at least one of following structures mutually between the Wheatstone bridge of the same Wheatstone bridge group：The One sharing structure, the second sharing structure and the 3rd sharing structure；Wherein, in first sharing structure, the power supply signal input that is connected with the shared resistance and described Induced signal measurement end is shared by two Wheatstone bridges；The power supply signal input being connected in second sharing structure with the shared resistance or the sensing letter Number measurement end is shared by three Wheatstone bridges；The power supply signal input being connected in 3rd sharing structure with the shared resistance or the sensing letter Number measurement end is shared by four Wheatstone bridges.
- 3. pressure sensor according to claim 2, it is characterised in thatThe Wheatstone bridge group includes at least P Wheatstone bridge, and wherein P is conjunction number；The each Wheatstone bridge and three other Wheatstone bridges for forming the same Wheatstone bridge group form the 3rd Sharing structure.
- 4. pressure sensor according to claim 3, it is characterised in thatThe Wheatstone bridge group includes 4 Wheatstone bridges, respectively the first Wheatstone bridge, the second Wheatstone bridge, Three Wheatstone bridges and the 4th Wheatstone bridge；4th resistance of first Wheatstone bridge and the first resistor of second Wheatstone bridge share；4th resistance of second Wheatstone bridge and the first resistor of the 3rd Wheatstone bridge share；4th resistance of the 3rd Wheatstone bridge and the first resistor of the 4th Wheatstone bridge share；4th resistance of the 4th Wheatstone bridge and the first resistor of first Wheatstone bridge share.
- 5. pressure sensor according to claim 3, it is characterised in thatThe Wheatstone bridge group includes four Wheatstone bridges, respectively the first Wheatstone bridge, the second Wheatstone bridge, Three Wheatstone bridges and the 4th Wheatstone bridge；The 3rd resistor of first Wheatstone bridge and the second resistance of second Wheatstone bridge share；4th resistance of the first resistor of second Wheatstone bridge and the 3rd Wheatstone bridge shares；The 3rd resistor of 3rd Wheatstone bridge and the second resistance of the 4th Wheatstone bridge share；The first resistor of 4th Wheatstone bridge and the 4th resistance of first Wheatstone bridge share.
- 6. pressure sensor according to claim 1, it is characterised in thatIn the same Wheatstone bridge, the first resistor, the second resistance, the 3rd resistor and the 4th electricity The shape of resistance is cuboid；The first resistor is put down with the 3rd resistor by the line of first end to the second end by first end to the line at the second end OK, the second resistance is put down with the 4th resistance by the line of first end to the second end by first end to the line at the second end OK；The first resistor is handed over by the line of first end to the second end with the second resistance by the line of first end to the second end Fork.
- 7. pressure sensor according to claim 1, it is characterised in that the Wheatstone bridge include first direction and with The second direction that the first direction intersects；In the same Wheatstone bridge, the first resistor by first end to the second end development length in a first direction Component is more than component in a second direction, the second resistance by first end to the second end development length in a second direction Component be more than component in a first direction, the 3rd resistor by first end to the second end development length in a first direction On component be more than component in a second direction, the 4th resistance is by the development length of first end to the second end in second party Upward component is more than component in a first direction.
- 8. pressure sensor according to claim 1, it is characterised in thatThe material for forming each resistance of the Wheatstone bridge is amorphous silicon material or polycrystalline silicon material.
- 9. pressure sensor according to claim 1, it is characterised in thatIn the same Wheatstone bridge, the ratio between resistance of the resistance of the first resistor and the second resistance is equal to described the The ratio between resistance of the resistance of four resistance and the 3rd resistor.
- 10. a kind of display panel, it is characterised in that including underlay substrate and form the pressure sensing on the underlay substrate Device；The pressure sensor is the pressure sensor described in claim any one of 1-9.
- 11. display panel according to claim 10, it is characterised in that the underlay substrate includes viewing area and around institute The non-display area of viewing area is stated,At least two pressure sensors are provided with the non-display area of the underlay substrate；At least two pressure sensors are respectively positioned at the relative both sides in the viewing area.
- 12. display panel according to claim 11, it is characterised in thatMultiple shift registers are provided with the non-display area of the underlay substrate, the multiple shift register distinguishes position In the relative both sides in the viewing area；Each shift register positioned at described viewing area the same side is arranged in order along third direction, is extended along fourth direction；Each resistance for forming the Wheatstone bridge is located at at least one in following positions respectively：The two neighboring displacement Between register, the shift register deviate from the viewing area close to the side of the viewing area and the shift register Side；Wherein, the resistance between the two neighboring shift register is less than in fourth direction in the length of third direction Length；It is more than positioned at resistance of the shift register close to the side of the viewing area in the length of third direction in four directions To length；It is more than positioned at resistance of the shift register away from the side of the viewing area in the length of third direction the The length in four directions；Wherein, the third direction and the fourth direction are parallel with the underlay substrate, and the third direction with it is described Fourth direction is intersected.
- 13. display panel according to claim 12, it is characterised in that also including multi-strip scanning line, the shift LD Device electrically connects with least one scan line respectively；Positioned at the shift register close to the side of the viewing area projection of the resistance on the underlay substrate with it is described Projection of the scan line on the underlay substrate is misaligned.
- 14. a kind of display device, it is characterised in that including the display panel any one of claim 10-13.
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| CN111998976A (en) * | 2020-08-07 | 2020-11-27 | 维沃移动通信有限公司 | Pressure sensor and electronic device |
| CN113739690A (en) * | 2020-05-29 | 2021-12-03 | 意法半导体亚太私人有限公司 | Strain gauge mode to prevent temperature induced variations |
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