CN107167948A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN107167948A CN107167948A CN201710576403.4A CN201710576403A CN107167948A CN 107167948 A CN107167948 A CN 107167948A CN 201710576403 A CN201710576403 A CN 201710576403A CN 107167948 A CN107167948 A CN 107167948A
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- pressure sensitivity
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Human Computer Interaction (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
The invention discloses a kind of display panel and display device.Display panel, including：Multiple pressure sensitivity units, pressure sensitivity unit includes forming the first resistor of electric bridge, second resistance, 3rd resistor and the 4th resistance, also include first input end, second input, first output end and the second output end, bias voltage applying circuit, it is connected with first input end and the second input, voltage detecting circuit, it is connected with the first output end and the second output end, wherein, the making material of first resistor includes the first material, the making material of second resistance includes the second material, wherein, the gage factor of first material is more than the gage factor of the second material, first resistor is more than the change in resistance amount that is produced by pressure of second resistance because of the be under pressure change in resistance amount of generation of display panel.Display panel and display device that the present invention is provided, voltage detecting circuit detect pressure sensitivity signal by force, and the sensitivity of pressure sensitivity touch controllable function is high.
Description
Technical field
The present invention relates to technical field of touch control, more particularly, to a kind of display panel and display device.
Background technology
The raising of development and Consumer's Experience requirement with Display Technique, pressure sensitivity touch-control (Force Touch) function is aobvious
Application in showing device is more and more extensive.
Force Touch functions, i.e., when extraneous pressing dynamics is different, display panel can be big according to different pressure
It is small to produce different induced signals, so as to perform corresponding operational order.Existing Force Touch technologies mainly have three kinds,
Respectively variable capacitance pressure sensitive, strain-type pressure sensitive and piezoelectric pressure sensing.
In existing strain-type pressure sensitive technology, pressure sensitivity device is main according to Wheatstone bridge principle design.Fig. 1 is pressure
The structural representation of inductor component, as shown in figure 1, pressure sensitivity device includes four resistance R11, R22, R33 and R44, wherein R11 with
R44 connects, and R22 connects with R33, by providing reference voltage to electric bridge in side a and b, after display panel is stressed, it is assumed that
R11 is different from R44 resistance change amounts, and R22 is not changed with R33 resistances or variable quantity is identical, by determine R11 with
Pressure difference change between the node b between node a and R22 and R33 between R44, calculates R11 and R44 resistances change, enters
And determine display panel compression dynamics size.In the bridge structure, after display panel is pressurized, R11 and R22 change in resistance amount are not
With or R44 is different from R33 change in resistance amounts can just detect the change of pressure difference.Inventor's discovery, existing resistance-type pressure
In inductor component, the difference of R11 and R22 change in resistance is smaller after compression, so that the variable quantity of the pressure difference measured is smaller, pressure
The sensitivity of inductor component is not high, influences the sensitivity of pressure sensitivity touch-control.
Therefore it provides a kind of high display panel of pressure sensitivity touch-control sensitivity and display device, are that this area is urgently to be resolved hurrily
Problem.
The content of the invention
In view of this, the invention provides a kind of display panel and display device, raising pressure sensitivity touch-control sensitivity is solved
Technical problem.
In order to solve the above-mentioned technical problem, the present invention proposes a kind of display panel.
Display panel proposed by the present invention, including：
Multiple pressure sensitivity units, pressure sensitivity unit includes forming the first resistor of electric bridge, second resistance, 3rd resistor and the 4th electricity
Resistance, in addition to first input end, the second input, the first output end and the second output end, wherein, first input end and the first electricity
Node connection between resistance and second resistance, the node connection between the second input and 3rd resistor and the 4th resistance, first
Node connection between output end and first resistor and the 4th resistance, the node of the second output end and 3rd resistor and second resistance
Connection；
Bias voltage applying circuit, is connected with first input end and the second input, for applying inclined to pressure sensitivity unit
Put voltage；
Voltage detecting circuit, is connected with the first output end and the second output end, the output voltage for detecting pressure sensitivity unit,
Wherein, the making material of first resistor includes the first material, and the making material of second resistance includes the second material, its
In, the gage factor of the first material is more than the gage factor of the second material, and first resistor is pressed because of display panel
The change in resistance amount that power is produced is more than the change in resistance amount that second resistance is produced by pressure.
To solve the above problems, the present invention also provides a kind of display device.
The display device that the present invention is provided, including any one display panel that the present invention is provided.
Compared with prior art, display panel of the invention and display device, realize following beneficial effect：
In the display panel that the present invention is provided, pressure sensitivity unit, the making material of first resistor includes the first material, the second electricity
The making material of resistance includes the second material, wherein, the gage factor of the first material is more than the sensitive system of strain of the second material
Two resistance of at least single electric bridge in number, pressure sensitivity unit of the invention, namely first resistor and second resistance are answered using different
The material for becoming sensitivity coefficient makes, and compared with each resistance of pressure sensitivity unit in the prior art is made using same material, shows
After showing that panel is stressed, the gap increase between the change in resistance amount of first resistor and the change in resistance amount of second resistance, so that
The partial pressure difference in first resistor and second resistance is increased, and then increases the voltage difference that voltage detecting circuit is detected, voltage
Detect that electric circuit inspection becomes strong to signal, improve the sensitivity of display panel pressure sensitivity touch controllable function.
By referring to the drawings to the detailed description of the exemplary embodiment of the present invention, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
The accompanying drawing for being combined in the description and constituting a part for specification shows embodiments of the invention, and even
It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is the structural representation of pressure sensitivity device in the prior art；
Fig. 2 is the electrical block diagram of pressure sensitivity unit provided in an embodiment of the present invention；
Fig. 3 is the schematic top plan view of display panel provided in an embodiment of the present invention；
Fig. 4 is first resistor schematic diagram provided in an embodiment of the present invention；
Fig. 5 is second resistance schematic diagram provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of pressure sensitivity unit provided in an embodiment of the present invention
Fig. 7 is a kind of schematic diagram of optional embodiment of display panel provided in an embodiment of the present invention；
Fig. 8 is a kind of optional embodiment schematic diagram of bridge resistor of pressure sensitivity unit provided in an embodiment of the present invention；
Fig. 9 is the schematic cross-section of display panel provided in an embodiment of the present invention；
Figure 10 is a kind of schematic cross-section of optional embodiment of display panel provided in an embodiment of the present invention；
Figure 11 is schematic cross-section of the display panel along third direction e；
Figure 12 is display panel a in the first direction schematic cross-section；
Figure 13 is the schematic top plan view of display device provided in an embodiment of the present invention.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition
Body illustrates that the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments does not limit this
The scope of invention.
The description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And its any limitation applied or used.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as a part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
The embodiment of the present invention provides a kind of display panel, and the display panel includes multiple pressure sensitivity units, and Fig. 2 is real for the present invention
The electrical block diagram of the pressure sensitivity unit of example offer is applied, as shown in Fig. 2 pressure sensitivity unit includes forming the first resistor of electric bridge
R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, in addition to first input end A, the second input B, the first output end
C and the second output end D, wherein, the node connection between first input end A and first resistor R1 and second resistance R2, second is defeated
Enter to hold the node between B and 3rd resistor R3 and the 4th resistance R4 to connect, the first output end C and first resistor R1 and the 4th resistance
Node connection between R4, the second output end D is connected with 3rd resistor R3 and second resistance R2 node.
Display panel also includes bias voltage applying circuit and voltage detecting circuit (not shown in figure), and bias voltage is applied
Power-up road is connected with first input end A and the second input B, for applying bias voltage to pressure sensitivity unit；Voltage detecting electricity
Road is connected with the first output end C and the second output end D, the output voltage for detecting pressure sensitivity unit.
The pressure sensitivity unit that the present invention is provided is resistance-type pressure sensitivity unit, is applied by bias voltage applying circuit to pressure sensitivity unit
Plus after bias voltage, using voltage detecting circuit detect pressure sensitivity unit output voltage it is poor, can determine display panel whether by
To the size of pressure touch and pressure touch pressure.
Specifically, bridge resistor first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 in pressure sensitivity unit
Resistance be respectively r1, r2, r3 and r4, according to bridge balance principle, four resistances meet r1/r2=r4/r3, biased electrical
The voltage that pressure is applied to A, B end is fixed as UAB, first resistor R1 and the 4th resistance R4 carries out partial pressure, another series connection in series arm
Second resistance R2 and 3rd resistor R3 carries out partial pressure in branch road.Usually, initial voltage difference U is setCDIt is zero, namely display panel
When not being stressed, first resistor R1 is identical with second resistance R2 partial pressure, and the 4th resistance R4 is identical with 3rd resistor R3 partial pressure,
Voltage difference U between the first output end C and the second output end D of now voltage detecting circuit detection pressure sensitivity unitCDIt is zero；And show
After showing that panel is stressed, four resistances of electric bridge change, electric bridge disequilibrium so that the electricity of first resistor R1 and second
The partial pressure for hindering R2 is different, between the first output end C and the second output end D that pressure sensitivity unit is now detected by voltage detecting circuit
Voltage difference UCDSize, can determine the size of pressure touch pressure.
First resistor R1 making material includes the first material M1 in the present invention, and second resistance R2 making material includes the
Two material M2, wherein, the first material M1 gage factor GF1 is more than the second material M2 gage factor GF2, first
Resistance R1 is more than the resistance change that second resistance R2 is produced by pressure because of the be under pressure change in resistance amount Δ r1 of generation of display panel
Change amount Δ r2.
First material M1 gage factor GF1 be more than the second material M2 gage factor GF2, display panel by
After pressure, first resistor R1 is more than second resistance R2 in the resistance change using the first material M1 parts made and uses the second material
Expect the resistance change for the part that M2 makes, first resistor R1 and second resistance that material identical with use in the prior art makes
R2 is compared, the difference between the change in resistance amount Δ r1 and second resistance R2 that increase first resistor R1 change in resistance amount Δ r2
Away from partial pressures of the first resistor R1 on the branch road of place becomes big, and partial pressures of the second resistance R2 on the branch road of place diminishes, and increases
Voltage difference U between first output end C and the second output end DCDVariable quantity, signal that voltage detecting circuit is detected becomes strong,
Improve the sensitivity of pressure sensitivity touch-control.
First resistor R1, which can be made or be used using the first material M1, in the present embodiment includes many of the first material M1
Plant material to make, second resistance R2 can be made using the second material M2 or using the multiple material system for including the second material M2
Make, the shape in the present embodiment for resistance is not limited, bridge resistor can be bar resistor or block resistance, Neng Goubao
Demonstrate,prove after display panel is pressurized, increase first resistor R1 change in resistance amount Δ r1 and second resistance R2 change in resistance amount Δ r2 it
Between gap performance, all this patent protection within the scope of.
In the display panel that the present invention is provided, pressure sensitivity unit, the making material of first resistor includes the first material, the second electricity
The making material of resistance includes the second material, wherein, the gage factor of the first material is more than the sensitive system of strain of the second material
Number, when resistance produces identical deformation quantity, the big material resistance change in resistance amount of gage factor is big, with pressure sensitivity in the prior art
Each resistance of unit is to make to compare using same material, after display panel is stressed, the change in resistance amount of first resistor
Gap increase between the change in resistance amount of second resistance, so that the partial pressure difference in first resistor and second resistance is increased,
And then the voltage difference that voltage detecting circuit is detected is increased, voltage detecting circuit detects signal and becomes strong, improves display surface
The sensitivity of plate pressure sensitivity touch controllable function.
Further, in some optional embodiments, in pressure sensitivity cell schematics as shown in Figure 2, first resistor
R1 making material is the first material M1, and second resistance R2 making material is the first material M1 and the second material M2.This implementation
The mode of structure in to(for) bridge resistor in pressure sensitivity unit is not limited.
In the embodiment, in pressure sensitivity unit, the making material of first resistor is the first material, and second resistance uses first
Two kinds of materials of material and the second material make, and can reach the voltage difference that increase voltage detecting circuit is detected, lifting display
On the basis of the sensitivity of panel pressure sensitivity touch controllable function, this kind of embodiment is also equipped with following effect：First, first resistor and the
The material category that two resistance are used is few, and manufacture craft is simple, and cost is small；Secondly, first resistor is made using the first material, and second
The making material of resistance also includes the first material, and first resistor and second resistance have identical making material, it is easier to real
Now first resistor is identical with second resistance partial pressure during initial pressure-less state.
Further, in some optional embodiments, the first material is semi-conducting material, and the second material is metal material
Material, semi-conducting material can use polysilicon semiconductor material or single-crystal semiconductor material, wherein, polysilicon semiconductor material
The gage factor of material is generally 30, and the gage factor of single-crystal semiconductor material is generally higher than 100, and metal material
Gage factor be generally less than 10.
In the embodiment, first resistor uses semi-conducting material manufacturing, and second resistance uses semi-conducting material and metal
Two kinds of materials of material make, and the gage factor of semi-conducting material and the gage factor difference of metal material are big, display
After panel is stressed, the change in resistance amount of first resistor and the change in resistance amount of second resistance can be made to reach larger gap,
So that there is larger partial pressure difference in first resistor and second resistance, and then voltage detecting circuit can obtain stronger letter
Number so that display surface has very sensitive pressure sensitivity touch controllable function.
Further, in some optional embodiments, Fig. 3 is the vertical view of display panel provided in an embodiment of the present invention
Schematic diagram, as shown in figure 3, display panel, including viewing area AA and rim area BA, multiple pressure sensitivity units 301 are arranged at rim area
BA.Wherein, multiple pressure sensitivity units 301 can be correspondingly arranged in left and right side frame area BA as shown in Figure 3, or can according to design requirement
To be provided only on the rim area BA of one side.
Four bridge resistors will reach that certain resistance can be only achieved voltage detecting circuit and be able to detect that in pressure sensitivity unit
Voltage signal, bridge resistor resistance itself is big, and after display panel is pressurized, the change in resistance amount of resistance is also big, and bridge resistor
The space that resistance is occupied more greatly is also bigger, and in the display panel that the embodiment is provided, multiple pressure sensitivity units are arranged on rim area,
The aperture opening ratio of viewing area is not influenceed, while the size of pressure sensitivity unit can flexibly be set.
Further, in some optional embodiments, Fig. 4 illustrates for first resistor provided in an embodiment of the present invention
Figure, Fig. 5 is second resistance schematic diagram provided in an embodiment of the present invention.
As shown in figure 4, first resistor, including the first resistor part Z1 of multiple a in the first direction extensions and multiple along second
Second resistance the part Z2, first direction a of direction b extensions are vertical with second direction b, and first resistor is made using the first material M1,
First resistor part Z1 a in the first direction length d1 is more than or equal to second resistance part Z2 b in a second direction length d2.
As shown in figure 5, second resistance, including it is multiple along the third direction e 3rd resistor part Z3 extended and multiple along the 4th
4th resistance unit Z4 of direction f extensions, third direction e are vertical with fourth direction f, wherein, 3rd resistor part Z3 uses the first material
Expect that M1 makes, the 4th resistance unit Z4 is made using the second material M2, length d3s of the 3rd resistor part Z3 along third direction e is more than etc.
In length d4s of the 4th resistance unit Z4 along fourth direction f.
The schematic diagram for the pressure sensitivity unit that Fig. 6 provides for the embodiment, first resistor R1 is resistance shape as shown in Figure 4, the
Two resistance R2 are resistance shape as shown in Figure 5.
In a kind of optional embodiment, the 3rd component Z3 and the 4th component Z4 use the second material in pressure sensitivity unit
Make.
In another optional embodiment, 3rd resistor part Z3 is made using the first material M2 in pressure sensitivity unit, the
Four resistance unit Z4 are made using the second material M1.
In the display panel that the embodiment is provided, after pressure sensitivity unit can realize that display panel is stressed, first resistor
Gap between change in resistance amount and the change in resistance amount of second resistance becomes big, so as to increase in first resistor and second resistance
Partial pressure difference, and then increase the voltage difference that voltage detecting circuit is detected, voltage detecting circuit detects signal and becomes strong, lifting
The sensitivity of display panel pressure sensitivity touch controllable function, meanwhile, this kind be repeatedly when pressure sensitivity unit is arranged at rim area, in pressure sensitivity unit
The resistance of the shape of bending is set, and ultraviolet light can be passed through between the component of resistance, compared with setting the resistance of monoblock, is had
Beneficial to glue frame solidification, it is to avoid leakage is brilliant or because glue frame solidification does not cause liquid crystal pollution to cause display bad entirely.
Further, in some optional embodiments, Fig. 7 is that display panel one kind provided in an embodiment of the present invention can
The schematic diagram of embodiment is selected, as shown in fig. 7, display panel is rectangular display panel, including viewing area AA and rim area BA, square
A extends the short side of shape display panel in the first direction, the long edge third direction e extensions of rectangular display panel.
First resistor as shown in Figure 4 and Figure 5 and the are set in the pressure sensitivity unit for the display panel that the embodiment is provided
Two resistance, deformation quantity is more than the deformation quantity of long side direction, the principal strain of first resistor on short side direction after display panel is stressed
Direction is identical with display panel short side direction, and the principal strain directions of second resistance is identical with the long side direction of display panel, enters one
Step is enhanced, and after display panel is pressurized, the strain sensitivity of first resistor and second resistance increases the intensity of pressure sensitivity signal.
Further, in some optional embodiments, 3rd resistor, including multiple first resistor parts and multiple second
Resistance unit；4th resistance, including multiple 3rd resistor parts and multiple 4th resistance units.
Fig. 8 is a kind of optional embodiment schematic diagram of bridge resistor of pressure sensitivity unit provided in an embodiment of the present invention, such as Fig. 8
Shown, first resistor R1 is identical with 3rd resistor R3 setting, including multiple first resistor part Z1 and multiple second resistance part Z2；
Second resistance R2 and the 4th resistance R4 setting are identical, including multiple 3rd resistor part Z3 and multiple 4th resistance unit Z4.First
Resistance unit Z1, second resistance part Z2 and 3rd resistor part Z3 are made using the first material M2, and the 4th resistance unit Z4 uses the second material
Expect that M1 makes.Bias voltage applying circuit is connected with first input end A and the second input B, for applying to pressure sensitivity unit
Bias voltage；Voltage detecting circuit is connected with the first output end C and the second output end D, the output electricity for detecting pressure sensitivity unit
Pressure.
In the embodiment, 3rd resistor R3 is identical with first resistor R1 settings, and the 4th resistance R4 and second resistance R2 is set
Put identical, after display panel is stressed, first resistor R1 and second resistance R2 resistance change gap becomes big, while the 3rd electricity
The resistance change gap for hindering R3 and the 4th resistance R4 becomes big, first in first resistor R1 and the 4th resistance R4 series circuit
Resistance R1 partial pressure increase, second resistance R2 partial pressure reduces in second resistance R2 and 3rd resistor R3 series circuit, enters
One step increases the voltage difference between the first output end C and the second output end D, and it is stronger that voltage detecting circuit detects signal, enters
One step improves the sensitivity of display panel pressure sensitivity touch controllable function.
Meanwhile, when pressure sensitivity unit is arranged at rim area, the shape that resistance is all bent repeatedly using this kind in pressure sensitivity unit
Resistance set, between the electrical component of resistance can pass through ultraviolet light, with set monoblock resistance compared with, be conducive to glue frame
Solidification, it is to avoid leakage is brilliant or because glue frame solidification does not cause liquid crystal pollution to cause display bad entirely.
Further, in some optional embodiments, Fig. 9 is the section of display panel provided in an embodiment of the present invention
Schematic diagram, as shown in figure 9, display panel includes：First substrate 102 and second substrate 103, wherein, second substrate 103 and first
Substrate 102 is oppositely arranged, wherein, first substrate 102 can be color membrane substrates, and second substrate 103 can be array base palte, multiple
Pressure sensitivity unit is arranged at array base palte.
Further, in some optional embodiments, second substrate includes multiple film layers；3rd resistor part and the 4th
Resistance unit is located at the different film layers of second substrate；First resistor part, second resistance part and 3rd resistor part are arranged at second substrate
Same film layer.
The schematic diagram of pressure sensitivity unit may be referred to Fig. 8 in the display panel that the embodiment is provided.In pressure sensitivity unit, use
The first electrical component, second resistance part and the 3rd resistor part that identical material makes are located at the same film layer of second substrate, the 3rd electricity
Resistor and the 4th resistance unit are located at the different film layers of second substrate, and are connected by via.For resistance unit in present embodiment
The film layer specifically set is not limited.
Further, in some optional embodiments, Figure 10 is the one of display panel provided in an embodiment of the present invention
The schematic cross-section of optional embodiment is planted, as shown in Figure 10, second substrate 103 is array base palte, and array base palte includes：Partly lead
Body active layer 1031, gate metal layer 1032, source-drain electrode metal level 1033 and touch control electrode layer 1034, first resistor part, second
Resistance unit is located at semiconductor active layer 1031 with 3rd resistor part, and same manufacturing process system is used with semiconductor active layer 1031
Make；4th resistance unit is located at one layer in gate metal layer 1032, source-drain electrode metal level 1033 and touch control electrode layer 1034, the 4th
Resistance unit is made with the metal level where it using same manufacturing process, and 3rd resistor part and the 4th resistance unit are connected by via
Connect.In the display panel that the embodiment is provided, the resistance unit of pressure sensitivity unit uses same manufacturing process with the film layer where it
Make, technique is simple.
Specifically, in a kind of optional embodiment, first resistor part, second resistance part and 3rd resistor part are used
Semi-conducting material manufacturing is located at semiconductor active layer, and the 4th resistance unit is located at source-drain electrode metal level, 3rd resistor part and the 4th electricity
Resistor is connected by via.The schematic diagram of pressure sensitivity unit may be referred to Fig. 8 in the display panel that the embodiment is provided.
Figure 11 is schematic cross-section of the display panel along third direction e, and Figure 12 is display panel a in the first direction section
Schematic diagram.Schematic cross-section shows the film layer and via connected mode where 3rd resistor part Z3 and the 4th resistance unit Z4.
As is illustrated by figs. 11 and 12, thin film transistor (TFT) 104, semiconductor active layer 1031, grid are provided with array base palte
Metal level 1032 and source-drain electrode metal level 1033 are used for the active layer, grid and source and drain for making thin film transistor (TFT) 104 successively respectively
Pole, array base palte is disposed with from top to bottom：Underlay substrate layer 1035, cushion 1036, semiconductor active layer 1031, interlayer
Insulating barrier 1037, gate metal layer 1032, source-drain electrode metal level 1033, planarization layer 1038, first resistor part Z1 (not shown),
Second resistance part Z2 (not shown) is located at semiconductor active layer 1031 with 3rd resistor part Z3, and the 4th resistance unit Z4 is located at source-drain electrode
Metal level 1033,3rd resistor part Z3 and the 4th resistance unit Z4 are connected by via Q.
In some optional embodiments, array base palte also include light shield layer, light shield layer be arranged at underlay substrate layer with
Between pressure sensitivity unit or underlay substrate layer is arranged at away from pressure sensitivity unit side, orthographic projection of the light shield layer on underlay substrate layer
Cover orthographic projection of the sensing unit on underlay substrate layer.
Pressure sensitivity unit sets light shield layer on the viewing area of display panel, array base palte, can avoid spreading out due to light
The change in resistance for producing resistance in photo-generated carrier influence pressure sensitivity unit is penetrated or scattered, and then ensure that display panel pressure sensitivity performance
Reliability.
Specifically, in a kind of optional embodiment, with reference to shown in Figure 11 and Figure 12, the light shield layer 1039 of array base palte
Between underlay substrate layer 1035 and semiconductor active layer 1031.The light shield layer of pressure sensitivity unit can be with film in array base palte
The light shield layer of the grid of transistor completes to make in same manufacturing process, is increased without new manufacturing process.
Further, the present invention also provides a kind of display device, including the display panel described in above-described embodiment.Figure 13 is this
The schematic top plan view for the display device that inventive embodiments are provided.
The resistance of pressure sensitivity units is made in the display device that the present invention is provided, pressure sensitivity unit using different materials, with showing
There is the pressure sensitivity unit made in technology using the material of same strain sensitivity coefficient to compare, increase after display panel is stressed,
Gap between the change in resistance amount of first resistor and the change in resistance amount of second resistance, so as to increase first resistor and second
Ohmically partial pressure difference, and then the voltage difference that voltage detecting circuit is detected is increased, voltage detecting circuit detects signal change
By force, the sensitivity of the pressure sensitivity touch controllable function of display device is improved.
By above-described embodiment, display panel of the invention and display device have reached following beneficial effect：
In the display panel that the present invention is provided, pressure sensitivity unit, the making material of first resistor includes the first material, the second electricity
The making material of resistance includes the second material, wherein, the gage factor of the first material is more than the sensitive system of strain of the second material
Number, when resistance produces identical deformation quantity, the big material resistance change in resistance amount of gage factor is big, pressure sensitivity unit of the invention
In single electric bridge two resistance use with differently strained sensitivity coefficient material make, it is each with pressure sensitivity unit in the prior art
Individual resistance is to make to compare using same material, is increased after display panel is stressed, the change in resistance amount of first resistor with
Gap between the change in resistance amount of second resistance, so as to increase the partial pressure difference in first resistor and second resistance, Jin Erzeng
The voltage difference that big voltage detecting circuit is detected, voltage detecting circuit detects signal and becomes strong, improves display panel pressure sensitivity
The sensitivity of touch controllable function.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area
Art personnel are it should be understood that example above is merely to illustrate, the scope being not intended to be limiting of the invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair
Bright scope is defined by the following claims.
Claims (15)
1. a kind of display panel, it is characterised in that including：
Multiple pressure sensitivity units, the pressure sensitivity unit includes forming the first resistor of electric bridge, second resistance, 3rd resistor and the 4th electricity
Resistance, in addition to first input end, the second input, the first output end and the second output end, wherein, the first input end and institute
State the node connection between first resistor and the second resistance, second input and the 3rd resistor and the described 4th
Node connection between resistance, the node connection between first output end and the first resistor and the 4th resistance,
Second output end is connected with the node of the 3rd resistor and the second resistance；
Bias voltage applying circuit, is connected with the first input end and the second input, for being applied to the pressure sensitivity unit
Plus bias voltage；
Voltage detecting circuit, is connected with first output end and second output end, for detecting the pressure sensitivity unit
Output voltage,
Wherein, the making material of the first resistor includes the first material, and the making material of the second resistance includes the second material
Material, wherein, the gage factor of first material is more than the gage factor of second material, the first resistor
Because the be under pressure change in resistance amount of generation of the display panel is more than the resistance change that the second resistance is produced by the pressure
Change amount.
2. display panel according to claim 1, it is characterised in that
The making material of the first resistor is first material, and the making material of the second resistance is first material
With second material.
3. display panel according to claim 2, it is characterised in that
First material is semi-conducting material, and second material is metal material.
4. display panel according to claim 3, it is characterised in that
The display panel, including viewing area and rim area,
The multiple pressure sensitivity unit is arranged at the rim area.
5. display panel according to claim 4, it is characterised in that
The first resistor, including multiple first resistor parts extended in a first direction and it is multiple extend in a second direction second
Resistance unit, the first direction is vertical with the second direction,
The second resistance, including multiple 3rd resistor parts extended along third direction and it is multiple extend along fourth direction the 4th
Resistance unit, the third direction is vertical with the fourth direction,
Wherein, the 3rd resistor part is made using the first material, and the 4th resistance unit is made using the second material.
6. display panel according to claim 5, it is characterised in that
Length of the first resistor part along the first direction is more than or equal to the second resistance part along the second direction
Length；
Length of the 3rd resistor part along the third direction is more than or equal to the 4th resistance unit along the fourth direction
Length.
7. display panel according to claim 5, it is characterised in that
The display panel is rectangular display panel, and the short side of the rectangular display panel extends along the first direction, described
Third direction described in the long edge of rectangular display panel extends.
8. display panel according to claim 5, it is characterised in that
The 3rd resistor, including multiple first resistor parts and multiple second resistance parts；
4th resistance, including multiple 3rd resistor parts and multiple 4th resistance units.
9. display panel according to claim 8, it is characterised in that
The display panel includes：First substrate and second substrate, wherein, the second substrate is relative with the first substrate to be set
Put,
The multiple pressure sensitivity unit is arranged at the second substrate.
10. display panel according to claim 9, it is characterised in that
The second substrate includes multiple film layers；
The 3rd resistor part and the 4th resistance unit are located at the different film layers of the second substrate；
The first resistor part, the second resistance part are arranged at the same film of the second substrate with the 3rd resistor part
Layer.
11. display panel according to claim 10, it is characterised in that
The second substrate is array base palte, and the array base palte includes：Semiconductor active layer, gate metal layer, source-drain electrode gold
Belong to layer and touch control electrode layer,
The first resistor part, two resistance unit and the 3rd resistor part are respectively positioned on the semiconductor active layer, and described the
Four resistance units are located at one layer in the gate metal layer, the source-drain electrode metal level and the touch control electrode layer.
12. display panel according to claim 11, it is characterised in that
4th resistance unit is located at the source-drain electrode metal level.
13. display panel according to claim 9, it is characterised in that
The second substrate is array base palte, and the array base palte includes underlay substrate layer and light shield layer,
The light shield layer is arranged between the underlay substrate layer and the pressure sensitivity unit or is arranged at the underlay substrate layer
Away from the pressure sensitivity unit side, orthographic projection of the light shield layer on underlay substrate layer covers the sensing unit in institute
State the orthographic projection on underlay substrate layer.
14. display panel according to claim 13, it is characterised in that
The array base palte includes semiconductor active layer, and the light shield layer is located at underlay substrate layer and the semiconductor active
Between layer.
15. a kind of display device, it is characterised in that including the display panel described in the claims any one of 1-14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576403.4A CN107167948B (en) | 2017-07-14 | 2017-07-14 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576403.4A CN107167948B (en) | 2017-07-14 | 2017-07-14 | Display panel and display device |
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| CN107167948A true CN107167948A (en) | 2017-09-15 |
| CN107167948B CN107167948B (en) | 2019-11-22 |
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| CN201710576403.4A Active CN107167948B (en) | 2017-07-14 | 2017-07-14 | Display panel and display device |
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| CN107422923A (en) * | 2017-09-20 | 2017-12-01 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN107632732A (en) * | 2017-09-20 | 2018-01-26 | 厦门天马微电子有限公司 | Display panel, display device and touch control operation moving direction recognition methods |
| CN107643851A (en) * | 2017-10-16 | 2018-01-30 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN206133507U (en) * | 2016-08-25 | 2017-04-26 | 上海天马微电子有限公司 | Display panel |
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| CN106482631A (en) * | 2015-08-26 | 2017-03-08 | 乐金显示有限公司 | Flexible display apparatus |
| CN105094449A (en) * | 2015-09-01 | 2015-11-25 | 宸鸿科技(厦门)有限公司 | Pressure sensing input module |
| KR101717062B1 (en) * | 2016-04-15 | 2017-03-16 | 크루셜텍 (주) | High sensitivity touch force sensing apparatus |
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| CN107422923A (en) * | 2017-09-20 | 2017-12-01 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN107632732A (en) * | 2017-09-20 | 2018-01-26 | 厦门天马微电子有限公司 | Display panel, display device and touch control operation moving direction recognition methods |
| CN107422923B (en) * | 2017-09-20 | 2020-06-16 | 厦门天马微电子有限公司 | Display panel and display device |
| CN107643851A (en) * | 2017-10-16 | 2018-01-30 | 武汉天马微电子有限公司 | Display panel and display device |
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| Publication number | Publication date |
|---|---|
| CN107167948B (en) | 2019-11-22 |
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