CN107167948B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN107167948B CN107167948B CN201710576403.4A CN201710576403A CN107167948B CN 107167948 B CN107167948 B CN 107167948B CN 201710576403 A CN201710576403 A CN 201710576403A CN 107167948 B CN107167948 B CN 107167948B
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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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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Position Input By Displaying (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a kind of display panel and display devices.Display panel, it include: multiple pressure sensitivity units, pressure sensitivity unit includes the first resistor to form electric bridge, second resistance, 3rd resistor and the 4th resistance, it further include first input end, second input terminal, first output end and second output terminal, bias voltage applying circuit, it is connected with first input end and the second input terminal, voltage detecting circuit, it is connected with the first output end and second output terminal, 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 greater than the gage factor of the second material, first resistor is greater than the change in resistance amount that generates by pressure of second resistance because of the be under pressure change in resistance amount of generation of display panel.Display panel provided by the invention and display device, voltage detecting circuit detect that pressure sensitivity signal is strong, the high sensitivity of pressure sensitivity touch function.
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 technique
The raising required with the development of display technology with user experience, pressure sensitivity touch-control (Force Touch) function is aobvious
In showing device using more and more extensive.
Force Touch function, i.e., when extraneous pressing dynamics difference, display panel can be big according to different pressure
It is small to generate different inductive signals, thereby executing corresponding operation instruction.There are mainly three types of existing Force Touch technologies,
Respectively variable capacitance pressure sensitive, strain-type pressure sensitive and piezoelectric pressure induction.
In existing strain-type pressure sensitive technology, pressure sensitivity device is mainly designed according to Wheatstone bridge principle.Fig. 1 is pressure
The structural schematic diagram of inductor component, as shown in Figure 1, pressure sensitivity device include four resistance R11, R22, R33 and R44, wherein R11 with
R44 series connection, R22 connect with R33, and by providing reference voltage to electric bridge in side a and b, display panel is after by pressure, it is assumed that
R11 is different from R44 resistance change amount, and R22 does not change with R33 resistance value or variable quantity is identical, by measurement R11 with
Pressure difference variation between node a between R44 and the node b between R22 and R33, calculates the variation of R11 Yu R44 resistance value, into
And determine display panel compression strength.In the bridge structure, after display panel is pressurized, R11 and R22 change in resistance amount are not
The same or R44 variation that just can detecte pressure difference different from R33 change in resistance amount.Inventors have found that 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 display panel that pressure sensitivity touch-control sensitivity is high and display device, are that this field is urgently to be resolved
Problem.
Summary of the invention
In view of this, solving the present invention provides a kind of display panel and display device and improving pressure sensitivity touch-control sensitivity
The technical issues of.
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, comprising:
Multiple pressure sensitivity units, pressure sensitivity unit include the first resistor to form electric bridge, second resistance, 3rd resistor and the 4th electricity
Resistance, further includes first input end, the second input terminal, the first output end and second output terminal, wherein first input end and the first electricity
Node connection between resistance and second resistance, the node connection between the second input terminal and 3rd resistor and the 4th resistance, first
Node connection between output end and first resistor and the 4th resistance, the node of second output terminal and 3rd resistor and second resistance
Connection；
Bias voltage applying circuit is connected with first input end and the second input terminal, inclined for applying to pressure sensitivity unit
Set voltage；
Voltage detecting circuit is connected with the first output end and second output terminal, for detecting the output voltage of 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,
In, the gage factor of the first material is greater than the gage factor of the second material, and first resistor is pressed because of display panel
The change in resistance amount that power generates is greater than the change in resistance amount that second resistance is generated by pressure.
To solve the above problems, the present invention also provides a kind of display devices.
Display device provided by the invention, including any one display panel provided by the invention.
Compared with prior art, display panel of the invention and display device, realize it is following the utility model has the advantages that
Display panel provided by the invention, in 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 greater than the sensitive system of strain of the second material
It counts, two resistance of at least single electric bridge namely first resistor and second resistance are answered using difference in pressure sensitivity unit of the invention
The material production for becoming sensitivity coefficient is shown compared with each resistance of pressure sensitivity unit in the prior art is using same material production
Show panel after by pressure, the gap between the change in resistance amount of first resistor and the change in resistance amount of second resistance increases, thus
The partial pressure difference in first resistor and second resistance is increased, and then increases the voltage difference that voltage detecting circuit detects, voltage
Detection circuit detects that signal becomes strong, improves the sensitivity of display panel pressure sensitivity touch function.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the structural schematic diagram 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 schematic cross-section of the display panel along first direction a；
Figure 13 is the schematic top plan view of display device provided in an embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
The embodiment of the present invention provides a kind of display panel, which includes multiple pressure sensitivity units, and Fig. 2 is that the present invention is real
The electrical block diagram that the pressure sensitivity unit of example offer is provided, as shown in Fig. 2, pressure sensitivity unit includes the first resistor to form electric bridge
R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 further include first input end A, the second input terminal B, the first output end
C and second output terminal 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, second output terminal D are connect with the node of 3rd resistor R3 and second resistance R2.
Display panel further includes bias voltage applying circuit and voltage detecting circuit (being not shown in figure), and bias voltage is applied
Power-up road is connected with first input end A and the second input terminal B, for applying bias voltage to pressure sensitivity unit；Voltage detecting electricity
Road is connected with the first output end C and second output terminal D, for detecting the output voltage of pressure sensitivity unit.
Pressure sensitivity unit provided by the invention is resistance-type pressure sensitivity unit, is applied by bias voltage applying circuit to pressure sensitivity unit
After adding bias voltage, using voltage detecting circuit detection 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 value 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 the end A, B is fixed as UAB, first resistor R1 and the 4th resistance R4 is divided in series arm, another series connection
Second resistance R2 and 3rd resistor R3 are divided in branch.Generally, initial voltage difference U is setCDIt is zero namely display panel
When not by pressure, first resistor R1 is identical as the partial pressure of second resistance R2, and the 4th resistance R4 is identical as the partial pressure of 3rd resistor R3,
Voltage difference U between the first output end C and second output terminal D of the pressure sensitivity unit of voltage detecting circuit detection at this timeCDIt is zero；And it shows
Show panel after by pressure, 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 second output terminal D for detecting pressure sensitivity unit by voltage detecting circuit at this time
Voltage difference UCDSize can determine the size of pressure touch pressure.
The making material of first resistor R1 includes the first material M1 in the present invention, and the making material of second resistance R2 includes the
Two material M2, wherein gage factor GF2 of the gage factor GF1 of the first material M1 greater than the second material M2, first
Resistance R1 is greater than the resistance value change that second resistance R2 generates by pressure because of the be under pressure change in resistance amount Δ r1 of generation of display panel
Change amount Δ r2.
The gage factor GF1 of first material M1 be greater than the second material M2 gage factor GF2, display panel by
After pressure, resistance change of the first resistor R1 in the part using the first material M1 production is greater than second resistance R2 and uses the second material
Expect the resistance change of the part of M2 production, the first resistor R1 and second resistance of material production identical as use in the prior art
R2 is compared, and increases the difference between the change in resistance amount Δ r2 of change in resistance the amount Δ r1 and second resistance R2 of first resistor R1
Away from partial pressure of the first resistor R1 on the branch road of place becomes larger, and partial pressure of the second resistance R2 on the branch road of place becomes smaller, and increases
Voltage difference U between first output end C and second output terminal DCDVariable quantity, signal that voltage detecting circuit detects 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 the more of the first material M1
Kind material production, second resistance R2 can be made or be used the multiple material system comprising the second material M2 using the second material M2
Make, in the present embodiment without limitation for the shape of resistance, bridge resistor can be bar resistor or blocky resistance, Neng Goubao
Demonstrate,prove display panel be pressurized after, 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 protect within the scope of.
Display panel provided by the invention, in 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 greater than the sensitive system of strain of the second material
Number, when resistance generates 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 compared using same material production, and display panel is after by pressure, the change in resistance amount of first resistor
Gap between the change in resistance amount of second resistance increases, so that the partial pressure difference in first resistor and second resistance is increased,
And then the voltage difference that voltage detecting circuit detects is increased, voltage detecting circuit detects that signal becomes strong, improves display surface
The sensitivity of plate pressure sensitivity touch function.
Further, in some alternative embodiments, in pressure sensitivity cell schematics as shown in Figure 2, first resistor
The making material of R1 is the first material M1, and the making material of second resistance R2 is the first material M1 and the second material M2.This implementation
In mode without limitation for the structure of bridge resistor in pressure sensitivity unit.
In the embodiment, in pressure sensitivity unit, the making material of first resistor is the first material, and second resistance uses first
The two kinds of material production of material and the second material, can reach the voltage difference for increasing voltage detecting circuit and detecting, promote display
On the basis of the sensitivity of panel pressure sensitivity touch function, this kind of embodiment is also equipped with following effect: firstly, first resistor and the
The material category that two resistance use is few, and manufacture craft is simple, and cost is small；Secondly, first resistor is made of the first material, second
The making material of resistance also includes the first material, first resistor and second resistance making material having the same, it is easier to real
Now first resistor is identical as second resistance partial pressure when initial pressure-less state.
Further, in some alternative embodiments, the first material is semiconductor material, and the second material is metal material
Material, semiconductor 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 semiconductor material and metal
Two kinds of material production of material, the gage factor of semiconductor material and the gage factor difference of metal material are big, display
For panel after by pressure, the change in resistance amount of the change in resistance amount and second resistance that can make first resistor reaches biggish gap,
To make have biggish 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 function.
Further, in some alternative 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 set to rim area
BA.Wherein, multiple pressure sensitivity units 301 can in left and right side frame area, BA be correspondingly arranged as shown in Figure 3, or can according to design requirement
To be provided only on unilateral rim area BA.
Four bridge resistors, which will reach certain resistance value and can be only achieved voltage detecting circuit, in pressure sensitivity unit is able to detect that
Voltage signal, bridge resistor resistance value itself is big, display panel be pressurized after, the change in resistance amount of resistance is also big, and bridge resistor
The space that resistance value occupies more greatly is also bigger, and in the display panel which provides, multiple pressure sensitivity units are arranged in rim area,
The aperture opening ratio of viewing area is not influenced, while capableing of the size of flexible setting pressure sensitivity unit.
Further, in some alternative embodiments, Fig. 4 is first resistor provided in an embodiment of the present invention signal
Figure, Fig. 5 are second resistance schematic diagram provided in an embodiment of the present invention.
As shown in figure 4, first resistor, including multiple first resistor part Z1 extended along first direction a and multiple along second
The second resistance part Z2 that direction b extends, first direction a is vertical with second direction b, and first resistor is made of the first material M1,
First resistor part Z1 is more than or equal to the length d2 of second resistance part Z2 b in a second direction along the length d1 of first direction a.
As shown in figure 5, second resistance, including multiple 3rd resistor part Z3 extended along third direction e and multiple along the 4th
The 4th resistance unit Z4 that direction f extends, third direction e are vertical with fourth direction f, wherein 3rd resistor part Z3 uses the first material
Expect M1 production, the 4th resistance unit Z4 is made of the second material M2, and 3rd resistor part Z3 is greater than along the length d3 of third direction e etc.
In the 4th resistance unit Z4 along the length d4 of fourth direction f.
Fig. 6 is the schematic diagram for the pressure sensitivity unit that the embodiment provides, and 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, third component Z3 and the 4th component Z4 use the second material in pressure sensitivity unit
Production.
In another optional embodiment, 3rd resistor part Z3 is made of the first material M2 in pressure sensitivity unit, the
Four resistance unit Z4 are made of the second material M1.
In the display panel that the embodiment provides, pressure sensitivity unit can be realized display panel after by pressure, first resistor
Gap between change in resistance amount and the change in resistance amount of second resistance becomes larger, to increase in first resistor and second resistance
Partial pressure difference, and then increase the voltage difference that voltage detecting circuit detects, voltage detecting circuit detects that signal becomes strong, is promoted
The sensitivity of display panel pressure sensitivity touch function, meanwhile, this kind be repeatedly when pressure sensitivity unit is set to rim area, in pressure sensitivity unit
The resistance of the shape of bending is arranged, and ultraviolet light can be penetrated between the component of resistance to be had compared with the resistance of setting monolith
Conducive to glue frame solidification, avoid leakage brilliant or because glue frame solidification do not cause entirely liquid crystal pollution cause to show it is bad.
Further, in some alternative 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
The short side of shape display panel extends along first direction a, and the long edge third direction e of rectangular display panel extends.
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 provides
Two resistance, deformation quantity is greater than the deformation quantity of longitudinal direction, the principal strain of first resistor to display panel on short side direction after by pressure
Direction is identical as display panel short side direction, and the principal strain directions of second resistance and the longitudinal direction of display panel are identical, into one
Step enhances, 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 alternative 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 the setting of 3rd resistor R3, including multiple first resistor part Z1 and multiple second resistance part Z2；
The setting of second resistance R2 and the 4th resistance R4 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 of the first material M2, and the 4th resistance unit Z4 uses the second material
Expect M1 production.Bias voltage applying circuit is connected with first input end A and the second input terminal B, for applying to pressure sensitivity unit
Bias voltage；Voltage detecting circuit is connected with the first output end C and second output terminal D, for detecting the output electricity of pressure sensitivity unit
Pressure.
In the embodiment, 3rd resistor R3 is identical as first resistor R1 setting, and the 4th resistance R4 and second resistance R2 is set
Set identical, after by pressure, the resistance change gap of first resistor R1 and second resistance R2 becomes larger display panel, while third electricity
The resistance change gap of resistance R3 and the 4th resistance R4 become larger, first in the series circuit of first resistor R1 and the 4th resistance R4
The partial pressure of resistance R1 increases, and the partial pressure of second resistance R2 reduces in the series circuit of second resistance R2 and 3rd resistor R3, into
One step increases the voltage difference between the first output end C and second output terminal D, and voltage detecting circuit detects that signal is stronger, into
One step improves the sensitivity of display panel pressure sensitivity touch function.
Meanwhile pressure sensitivity unit is when being set to rim area, the shape that resistance all uses this kind to bend repeatedly in pressure sensitivity unit
Resistance setting, between the electrical component of resistance can penetrate ultraviolet light, with setting monolith resistance compared with, be conducive to glue frame
Solidification, avoid leakage brilliant or because glue frame solidification do not cause entirely liquid crystal pollution cause to show it is bad.
Further, in some alternative 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 the second substrate 103, wherein the second substrate 103 and first
Substrate 102 is oppositely arranged, wherein first substrate 102 can be color membrane substrates, and the second substrate 103 can be array substrate, multiple
Pressure sensitivity unit is set to array substrate.
Further, in some alternative embodiments, the second substrate includes multiple film layers；3rd resistor part and the 4th
Resistance unit is located at the different film layers of the second substrate；First resistor part, second resistance part and 3rd resistor part are set to the second substrate
Same film layer.
The schematic diagram of pressure sensitivity unit can refer to Fig. 8 in the display panel that the embodiment provides.In pressure sensitivity unit, use
The first electrical component, second resistance part and the 3rd resistor part of identical material production are located at the same film layer of the second substrate, third electricity
Resistor and the 4th resistance unit are located at the different film layers of the second substrate, and are connected by via hole.For resistance unit in present embodiment
The film layer being specifically arranged is without limitation.
Further, in some alternative embodiments, Figure 10 is the one of display panel provided in an embodiment of the present invention
The schematic cross-section of kind optional embodiment, as shown in Figure 10, the second substrate 103 is array substrate, and array substrate includes: partly to lead
Body active layer 1031, gate metal layer 1032, source-drain electrode metal layer 1033 and touch control electrode layer 1034, first resistor part, second
Resistance unit and 3rd resistor part are located at semiconductor active layer 1031, use same manufacturing process system with semiconductor active layer 1031
Make；4th resistance unit is located at one layer in gate metal layer 1032, source-drain electrode metal layer 1033 and touch control electrode layer 1034, and the 4th
Resistance unit and the metal layer where it are made of same manufacturing process, and 3rd resistor part and the 4th resistance unit are connected by via hole
It connects.In the display panel that the embodiment provides, the resistance unit of pressure sensitivity unit and the film layer where it use the same manufacturing process
Production, simple process.
Specifically, first resistor part, second resistance part and 3rd resistor part are all made of in a kind of optional embodiment
Semi-conducting material manufacturing is located at semiconductor active layer, and the 4th resistance unit is located at source-drain electrode metal layer, 3rd resistor part and the 4th electricity
Resistor is connected by via hole.The schematic diagram of pressure sensitivity unit can refer to Fig. 8 in the display panel that the embodiment provides.
Figure 11 is schematic cross-section of the display panel along third direction e, and Figure 12 is display panel along the section of first direction a
Schematic diagram.Schematic cross-section shows the film layer and via hole connection type 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 in array substrate
Metal layer 1032 and source-drain electrode metal layer 1033 are orderly used to active layer, grid and the source and drain of production thin film transistor (TFT) 104 respectively
Pole, array substrate are disposed with from top to bottom: underlay substrate layer 1035, buffer layer 1036, semiconductor active layer 1031, interlayer
Insulating layer 1037, gate metal layer 1032, source-drain electrode metal layer 1033, planarization layer 1038, first resistor part Z1 (not shown),
Second resistance part Z2 (not shown) and 3rd resistor part Z3 are located at semiconductor active layer 1031, and the 4th resistance unit Z4 is located at source-drain electrode
Metal layer 1033,3rd resistor part Z3 and the 4th resistance unit Z4 are connected by via hole Q.
In some alternative embodiments, array substrate further includes light shield layer, light shield layer be set to underlay substrate layer with
Between pressure sensitivity unit or underlay substrate layer is set to far 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.
Light shield layer is arranged on the viewing area of display panel, array substrate in pressure sensitivity unit, can be avoided spreading out due to light
The change in resistance for generating 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 substrate
Between underlay substrate layer 1035 and semiconductor active layer 1031.The light shield layer of pressure sensitivity unit can be with film in array substrate
The light shield layer of the grid of transistor completes the production in same manufacturing process, is increased without new manufacturing process.
Further, the present invention also provides a kind of display devices, including display panel described in above-described embodiment.Figure 13 is this
The schematic top plan view for the display device that inventive embodiments provide.
Display device provided by the invention, it is and existing using the resistance of different material production pressure sensitivity units in pressure sensitivity unit
Have in technology and compared using the pressure sensitivity unit that the material of same strain sensitivity coefficient makes, increases display panel after by pressure,
Gap between the change in resistance amount of first resistor and the change in resistance amount of second resistance, to increase first resistor and second
Ohmically partial pressure difference, and then the voltage difference that voltage detecting circuit detects is increased, voltage detecting circuit detects that signal becomes
By force, the sensitivity of the pressure sensitivity touch function of display device is improved.
Through the foregoing embodiment it is found that display panel and display device of the invention, reached it is following the utility model has the advantages that
Display panel provided by the invention, in 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 greater than the sensitive system of strain of the second material
Number, when resistance generates identical deformation quantity, big, the of the invention pressure sensitivity unit of the big material resistance change in resistance amount of gage factor
In two resistance of single electric bridge use the material with differently strained sensitivity coefficient to make, it is each with pressure sensitivity unit in the prior art
A resistance be using same material production compare, increase display panel after by pressure, the change in resistance amount of first resistor with
Gap between the change in resistance amount of second resistance, to increase the partial pressure difference in first resistor and second resistance, Jin Erzeng
The voltage difference that big voltage detecting circuit detects, voltage detecting circuit detect that signal becomes strong, improve display panel pressure sensitivity
The sensitivity of touch function.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (12)
1. a kind of display panel characterized by comprising
Multiple pressure sensitivity units, the pressure sensitivity unit include the first resistor to form electric bridge, second resistance, 3rd resistor and the 4th electricity
Resistance, further includes first input end, the second input terminal, the first output end and second output terminal, wherein the first input end and institute
State the node connection between first resistor and the second resistance, second input terminal 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,
The second output terminal is connect 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 terminal, for applying to the pressure sensitivity unit
Add bias voltage；
Voltage detecting circuit is connected with first output end and the second output terminal, for detecting the pressure sensitivity unit
Output voltage,
Wherein, the making material of the first resistor is the first material, the making material of the second resistance be the first material and
Second material, wherein first material is semiconductor material, and second material is metal material, first material
Gage factor is greater than the gage factor of second material, and the first resistor is under pressure because of the display panel
The change in resistance amount of generation is greater than the change in resistance amount that the second resistance is generated by the pressure；
The first resistor, including multiple first resistor parts extended in a first direction and multiple second extended in a second direction
Resistance unit, the first direction are vertical with the second direction；The second resistance, including multiple the extended along third direction
Three resistance units and multiple the 4th resistance units extended along fourth direction, the third direction are vertical with the fourth direction；Wherein,
The 3rd resistor part is made of the first material, and the 4th resistance unit is made of the second material.
2. display panel according to claim 1, which is characterized in that
The display panel, including viewing area and rim area,
The multiple pressure sensitivity unit is set to the rim area.
3. display panel according to claim 1, which is characterized in that
The first resistor part is more than or equal to the second resistance part along the second direction along the length of the first direction
Length；
The 3rd resistor part is more than or equal to the 4th resistance unit along the fourth direction along the length of the third direction
Length.
4. display panel according to claim 1, which is characterized 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.
5. display panel according to claim 1, which is characterized 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.
6. display panel according to claim 5, which is characterized in that
The display panel includes: first substrate and the second substrate, wherein the second substrate is opposite with the first substrate to be set
It sets,
The multiple pressure sensitivity unit is set to the second substrate.
7. display panel according to claim 6, which is characterized 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 and the 3rd resistor part are set to the same film of the second substrate
Layer.
8. display panel according to claim 7, which is characterized in that
The second substrate is array substrate, and the array substrate 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 layer and the touch control electrode layer.
9. display panel according to claim 8, which is characterized in that
4th resistance unit is located at the source-drain electrode metal layer.
10. display panel according to claim 6, which is characterized in that
The second substrate is array substrate, and the array substrate includes underlay substrate layer and light shield layer,
The light shield layer is set between the underlay substrate layer and the pressure sensitivity unit or is set to the underlay substrate layer
Far from pressure sensitivity unit side, orthographic projection of the light shield layer on the underlay substrate layer covers the pressure sensitivity unit in institute
State the orthographic projection on underlay substrate layer.
11. display panel according to claim 10, which is characterized in that
The array substrate includes semiconductor active layer, and the light shield layer is located at the underlay substrate layer and the semiconductor active
Between layer.
12. a kind of display device, which is characterized in that including the described in any item display panels of the claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576403.4A CN107167948B (en) | 2017-07-14 | 2017-07-14 | Display panel and display device |
Applications Claiming Priority (1)
| 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 CN107167948A (en) | 2017-09-15 |
| CN107167948B true CN107167948B (en) | 2019-11-22 |
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| CN107422923B (en) * | 2017-09-20 | 2020-06-16 | 厦门天马微电子有限公司 | 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 |
| CN107643851B (en) * | 2017-10-16 | 2020-01-03 | 武汉天马微电子有限公司 | Display panel and display device |
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| KR102396458B1 (en) * | 2015-08-26 | 2022-05-10 | 엘지디스플레이 주식회사 | Flexible display device |
| CN105094449B (en) * | 2015-09-01 | 2018-09-28 | 宸鸿科技(厦门)有限公司 | A kind of pressure-sensing input module |
| KR101717062B1 (en) * | 2016-04-15 | 2017-03-16 | 크루셜텍 (주) | High sensitivity touch force sensing apparatus |
| CN106325602A (en) * | 2016-08-25 | 2017-01-11 | 合肥京东方光电科技有限公司 | Touch screen, touch display device and touch screen deformation detection method and device |
| 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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