CN207458005U - Display module and its pressure sensor module - Google Patents
Display module and its pressure sensor module Download PDFInfo
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- CN207458005U CN207458005U CN201720881241.0U CN201720881241U CN207458005U CN 207458005 U CN207458005 U CN 207458005U CN 201720881241 U CN201720881241 U CN 201720881241U CN 207458005 U CN207458005 U CN 207458005U
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Abstract
The utility model is related to a kind of display module and its pressure sensor modules, above-mentioned pressure sensor module includes edge sensing unit and middle part sensing unit, edge sensing unit is put in the region at the edge of display screen, and the angular range of the extending direction of the sensitive grid of edge sensing unit and the extending direction at edge is 60 ° to 120 °；Middle part sensing unit is arranged in the region at the middle part of display screen, and the angular range of the extending direction of the part sensitive grid of middle part sensing unit and the extending direction of another part sensitive grid of middle part sensing unit is 60 ° to 120 °.When display screen is deformed upon by the region of proximal edge, draw direction is substantially vertical with the extending direction at edge, the angle of the extending direction of the sensitive grid of edge sensing unit and the extending direction at edge is arranged to 60 ° to 120 °, the pressure-sensing capabilities of draw direction can be improved, and then improve the accuracy of pressure detecting.
Description
Technical field
The utility model is related to the technical field of display device, more particularly to a kind of display module and its pressure sensing group
Part.
Background technology
The pressure sensitive scheme of traditional touch display field, generally with next perpendicular to the deformation of the Z-direction of display surface
Pressure is detected, specifically, pressure inductor can be placed in the detection that display screen below or above carries out pressure.However Z axis
The deformation in direction can directly squeeze display screen part, and application for a long time may influence the display function of display screen.Inspection
The deformation of X/Y plane where survey display surface can influence caused by avoid display screen is directly squeezed, but if will be traditional
X/Y plane shape changing detection structure is applied to touch display screen, can not meet the requirement of accuracy.
Utility model content
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of pressure detecting accuracy high display module and its pressure
Sensory package.
A kind of pressure sensor module of display module, for being stacked with the display screen of the display module, the pressure
Power sensory package includes：
Edge sensing unit, for being positioned close in the region at the edge of the display screen, the edge sensing unit
The angular range of extending direction at extending direction and the edge of sensitive grid be 60 ° to 120 °；And
Middle part sensing unit, for being arranged in the region at the middle part of the display screen, the portion of the middle part sensing unit
The angular range for dividing the extending direction of the extending direction of sensitive grid and another part sensitive grid of the middle part sensing unit is 60 °
To 120 °.
The pressure sensor module of above-mentioned display module, display screen lean on the region of proximal edge compared to the regional deformation amount at middle part
Often deficiency.When display screen is deformed upon by the region of proximal edge, draw direction is substantially vertical with the extending direction at edge, because
This, 60 ° to 120 ° are arranged to by the angle of the extending direction of the sensitive grid of edge sensing unit and the extending direction at edge, can be with
The pressure-sensing capabilities of draw direction are improved, and then improve the accuracy of pressure detecting.When angle is 90 °, most of edge
The semaphore of sensing unit can be maximum, and it is bigger that angle more deviates 90 ° of semaphores losses, when angle is 60 ° or 120 °, signal
Amount reduces about 14%, if angle is less than 60 ° or more than 120 °, semaphore loss can be excessive.Region hair in the middle part of display screen
During raw deformation, draw direction almost includes all directions, therefore, by the extending direction of the part sensitive grid of middle part sensing unit with
The angle of the extending direction of another part sensitive grid is arranged to 60 ° to 120 °, can detect the pressure of all directions in plane, in
The region in portion generally has enough deformation quantities, can ensure the accuracy of middle part pressure detecting.When angle is 90 °, middle part
The semaphore of sensing unit is maximum, and it is bigger that angle more deviates 90 ° of semaphores losses, when angle is 60 ° or 120 °, semaphore drop
Low about 14%, if angle is less than 60 ° or more than 120 °, semaphore loss can be excessive.
In one of the embodiments, the extension of the extending direction of the sensitive grid of the edge sensing unit and the edge
Direction is vertical, and the extending direction of the part sensitive grid of the middle part sensing unit and another part of the middle part sensing unit are quick
The extending direction for feeling grid is vertical.When display screen is deformed upon by the region of proximal edge, extension of the draw direction substantially with edge
Direction is vertical, therefore, the extending direction of the sensitive grid of edge sensing unit is vertical with the extending direction at edge, improves stretching side
To pressure-sensing capabilities technique effect it is optimal.When region in the middle part of display screen deforms upon, draw direction almost includes
All directions, therefore, by the extending direction of the part sensitive grid of middle part sensing unit and the extending direction of another part sensitive grid
It is arranged to vertical, the accuracy of middle part pressure detecting is more preferably.
In one of the embodiments, the edge sensing unit includes the first sensing unit and the second sensing unit；
First sensing unit is used in the region for the first edge for being positioned close to the display screen, and described first passes
The angular range for feeling the extending direction of the sensitive grid of unit and the extending direction of the first edge is 60 ° to 120 °；
Second sensing unit is used to be positioned close to second side adjacent with the first edge of the display screen
In the region of edge, the angle model of the extending direction of the sensitive grid of second sensing unit and the extending direction of the second edge
It encloses for 60 ° to 120 °.
The sensitive grid of first sensing unit and the above-mentioned angular range of first edge can be improved close to the area of first edge
Pressure-sensing capabilities in domain, the sensitive grid of the second sensing unit and the above-mentioned angular range of second edge, can improve close
Pressure-sensing capabilities in the region of second edge.
In one of the embodiments, the quantity of first sensing unit is multiple, multiple first sensing units
It is distributed in the region of the first edge of the close display screen；
The quantity of second sensing unit is multiple, and multiple second sensing units are distributed in described close to described aobvious
In the region of the second edge of display screen；
The quantity of the middle part sensing unit is multiple, and multiple middle part sensing units are distributed in the display screen
In the region in portion.
Due to, the quantity of the first sensing unit, the second sensing unit and middle part sensing unit be it is multiple, therefore, can be with
Accurately detect the pressure of each position.
In one of the embodiments, the close display screen first edge region with described close to described
In the region of the area coincidence of the second edge of display screen, first sensing unit is set or second sensing unit is set
Or it is not provided with first sensing unit and second sensing unit.The region of coincidence is less likely to occur to deform, therefore can be with
By above-mentioned set-up mode, to facilitate processing.
In one of the embodiments, the edge sensing unit and the middle part sensing unit are full-bridge strain gauge.
Therefore, detection sensitivity is higher.
In one of the embodiments, substrate layer is further included, the substrate layer includes opposite the first face and the second face；
The sensitive grid of the edge sensing unit and the middle part sensing unit include be sequentially connected electrically the first sensitive grid,
Second sensitive grid, the 3rd sensitive grid and the 4th sensitive grid, first sensitive grid and the 3rd sensitive grid are located at described first
On face, second sensitive grid and the 4th sensitive grid are located on second face；First sensitive grid and the described 3rd
The position of sensitive grid is opposite with the position of second sensitive grid and the 4th sensitive grid.
Therefore, when pressing edge sensing unit or middle part sensing unit, the sensitive grid on the first face and the second face is same
Shi Fasheng resistance variations can further improve the sensitivity of detection.
In one of the embodiments, first sensitive grid, second sensitive grid, the 3rd sensitive grid and described
4th sensitive grid includes multiple main parts and multiple connecting portions, and multiple main parts are set up in parallel and extending direction is consistent,
The two neighboring main part is connected by the connecting portion, connects two connecting portion difference of the same main part
Positioned at the both ends of the main part；
The extending direction of multiple main parts of the edge sensing unit is consistent, the sensitivity of the edge sensing unit
The extending direction of grid is the extending direction of the main part of the edge sensing unit；
First sensitive grid of the middle part sensing unit and multiple main parts of the 3rd sensitive grid prolong
Stretch that direction is consistent, second sensitive grid of the middle part sensing unit and multiple main parts of the 4th sensitive grid
Extending direction is consistent, and first sensitive grid of the middle part sensing unit and the main part of the 3rd sensitive grid prolong
Stretch the extension side of second sensitive grid in direction and the middle part sensing unit and the main part of the 4th sensitive grid
To angular range be 60 ° to 120 °.
The extending direction of the main part of edge sensing unit is consistent, is adapted to detect for the stretching of single direction, sensitivity highest.
The portion body portion of middle part sensing unit, in above-mentioned angle, is adapted to detect for the stretching of all directions with another part main part.
In one of the embodiments, first through hole, the second through hole, third through-hole and the 4th are offered on the substrate layer
Through hole, filled with conductive materials in the first through hole, second through hole, the third through-hole and the fourth hole,
To be respectively formed the first contact, the second contact, the 3rd contact and the 4th contact；
The head end of the end of first sensitive grid and second sensitive grid is electrically connected by first contact；It is described
The head end of the end of second sensitive grid and the 3rd sensitive grid is electrically connected by second contact；3rd sensitive grid
The head end of end and the 4th sensitive grid is electrically connected by the 3rd contact；The end of 4th sensitive grid and described
The head end of one sensitive grid is electrically connected by the 4th contact.Sensitive grid is set through the above scheme, facilitates processing, compact in design
Rationally, and electrical connection is reliable.
In one of the embodiments, first contact and the 3rd contact are respectively used to connect the display module
Power end and ground terminal；Second contact and the 4th contact are respectively used to connect the detection electricity of the display module
Road.Therefore it is convenient for being connected with power end, ground terminal and detection circuit.Certainly, in other embodiments, first contact and institute
Stating the 3rd contact can also be respectively used to connect the detection circuit of the display module；Correspondingly, second contact and described
4th contact can also be respectively used to connect the power end and ground terminal of the display module.
In one of the embodiments, first sensitive grid, second sensitive grid, the 3rd sensitive grid and described
The Standard resistance range of 4th sensitive grid is 120 Ω to 5 × 107Ω.Resistance value gets over that high current is smaller, and the heat of generation is fewer, is conducive to
The influence of temperature is reduced, but the driving voltage of the bigger needs of resistance value is bigger, can increase energy consumption.If resistance value is less than 120 Ω, production
Raw heat is excessive, is unfavorable for radiating, and temperature raises the accuracy that may influence pressure detecting.If resistance value is more than 5 × 107
Ω, the driving voltage being adapted to therewith is excessive, and energy consumption is excessive.
In one of the embodiments, first sensitive grid, second sensitive grid, the 3rd sensitive grid and described
The Standard resistance range of 4th sensitive grid is 1 × 103Ω to 5 × 105Ω.If resistance value is less than 1 × 103Ω, the heat of generation is larger,
It is unfavorable for radiating, temperature raises the accuracy that may influence pressure detecting.If resistance value is more than 5 × 105Ω, the drive being adapted to therewith
Dynamic voltage is larger, and energy consumption is larger.
In one of the embodiments, the area model of the sensitive grid of the edge sensing unit and the middle part sensing unit
It encloses for 10mm2To 25cm2.The area of sensitive grid can be according to the shape of display screen, size and edge sensing unit and middle part
The quantity and distribution density of sensing unit determine.If display module is applied to mobile phone, area is less than 10mm2Then edge is needed to sense
Unit and middle part sensing unit are that quantity is more, are unfavorable for cabling and reduce cost.It is shown if display module is applied to large-scale touch-control
Show device, the area of sensitive grid can be larger accordingly, still, if area is more than 25cm2Then possibly it can not accurately detect pressure
Power.
A kind of display module, which is characterized in that including display screen and the pressure sensor module；Display screen and pressure pass
Sense component is stacked；In the region at the edge that the edge sensing unit is positioned close to the display screen, the middle part passes
In the region at the middle part that sense unit is arranged on the display screen.
Above-mentioned display module, display screen are often insufficient compared to the regional deformation amount at middle part by the region of proximal edge.When aobvious
When display screen is deformed upon by the region of proximal edge, draw direction is substantially vertical with the extending direction at edge, and therefore, edge is sensed
The angle of the extending direction of the sensitive grid of unit and the extending direction at edge is arranged to 60 ° to 120 °, can improve draw direction
Pressure-sensing capabilities, and then improve pressure detecting accuracy.When region in the middle part of display screen deforms upon, draw direction
Almost include all directions, therefore, by the extending direction of the part sensitive grid of middle part sensing unit and another part sensitive grid
The angle of extending direction is arranged to 60 ° to 120 °, can detect the pressure of all directions in plane, and the region at middle part generally has
Enough deformation quantities can ensure the accuracy of middle part pressure detecting.
In one of the embodiments, the display screen is rectangular, and the width in the region at the close edge is institute
Edge is stated to the 10% to 30% of the distance at the center of the display screen.When display screen is deformed upon by the region of proximal edge,
Draw direction in above-mentioned zone is substantially vertical with the extending direction at edge.If it is less than edge by the width in the region of proximal edge
To the 10% of the distance at the center of display screen, for arranging that the area of edge sensing unit is too small, it is impossible to preferably play edge
The high sensitivity of sensing unit and the detection advantage of accuracy.If it is more than edge to display screen by the width in the region of proximal edge
Center distance 30%, do not known by paracentral position deformation direction, influence detection result.
In one of the embodiments, signal wire and detection circuit are further included, the signal wire senses the edge single
First and described middle part sensing unit is respectively connected to the detection circuit；The sensitive grid of the edge sensing unit and the middle part
The sensitive grid of sensing unit is respectively formed Wheatstone bridge area, and the signal wire is located at outside the Wheatstone bridge area；
The display module further includes power cord, power end, ground wire and ground terminal；The power cord passes the edge
Sense unit and the middle part sensing unit are respectively connected to the power end；It is described to be grounded the edge sensing unit and institute
It states middle part sensing unit and is respectively connected to the ground terminal；The power cord and the ground wire are respectively positioned on the Wheatstone bridge
Outside area.
Since when display screen deforms change in resistance can also occur for the cabling inside process display screen, compared to general
The edge that sensitive grid guides to display screen reconnects the mode of signal wire, power cord or ground wire, by the Hui Si in Wheatstone bridge area
Energization bridge is built in smaller scope, and signal wire, power cord and ground wire are arranged on outside Wheatstone bridge area, can
Ensure the accuracy of pressure detecting.
In one of the embodiments, the signal wire inside the display screen, the power cord and described connect
The width of ground wire is 2-500 times of the width of the sensitive grid of the edge sensing unit.It can be into one using thicker line width
The reduction display screen of step deforms the influence caused by resistance value.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings the attached drawing of other embodiment.
Fig. 1 is the schematic diagram of display module in an embodiment；
Fig. 2 is the schematic diagram in the region of the first edge of the close display screen of display module shown in FIG. 1；
Fig. 3 is the schematic diagram in the region of the second edge of the close display screen of display module shown in FIG. 1；
Fig. 4 is the schematic diagram in the region at the middle part of the close display screen of display module shown in FIG. 1；
Fig. 5 is the first sensitive grid of middle part sensing unit of display module shown in FIG. 1 and the schematic diagram of the 3rd sensitive grid；
Fig. 6 is the second sensitive grid of middle part sensing unit of display module shown in FIG. 1 and the schematic diagram of the 4th sensitive grid；
Fig. 7 is that the folded of first to fourth sensitive grid of the middle part sensing unit of display module shown in FIG. 1 sets schematic diagram；
Fig. 8 is the first sensitive grid of the first sensing unit of display module shown in FIG. 1 and the schematic diagram of the 3rd sensitive grid；
Fig. 9 is the second sensitive grid of the first sensing unit of display module shown in FIG. 1 and the schematic diagram of the 4th sensitive grid；
Figure 10 is that the folded of first to fourth sensitive grid of the first sensing unit of display module shown in FIG. 1 sets schematic diagram；
Figure 11 is the signal of the first sensitive grid and the 3rd sensitive grid of the second sensing unit of display module shown in FIG. 1
Figure；
Figure 12 is the signal of the second sensitive grid and the 4th sensitive grid of the second sensing unit of display module shown in FIG. 1
Figure；
Figure 13 is that the folded of first to fourth sensitive grid of the second sensing unit of display module shown in FIG. 1 sets schematic diagram；
Figure 14 is the middle part sensing unit of display module shown in FIG. 1 and the partial cutaway schematic of edge sensing unit；
Figure 15 is the middle part sensing unit of display module shown in FIG. 1 and the simple schematic diagram of edge sensing unit；
Figure 16 is the power cord of display module shown in FIG. 1 and the cabling schematic diagram of ground wire；
Figure 17 is the cabling schematic diagram of the signal wire of display module in another embodiment；
Figure 18 is the power cord of the display module shown in Figure 17 and the cabling schematic diagram of ground wire.
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is the public affairs made to the utility model
Open content more thorough and comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to the technology of the utility model
The normally understood meaning of technical staff in domain is identical.It is simply in the term used in the description of the utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more relevant Listed Items.
As shown in Figure 1, the display module 10 of an embodiment includes the pressure sensor module 100 being stacked and display
Screen 200, pressure sensor module 100 include edge sensing unit 120 and middle part sensing unit 140, and edge sensing unit 120 is set
In the region at the edge of close display screen 200, the extension of the extending direction and edge of the sensitive grid of edge sensing unit 120
The angular range in direction is 60 ° to 120 °.Middle part sensing unit 140 is arranged in the region at the middle part of display screen 200, and middle part passes
Feel the extending direction of the extending direction of the part sensitive grid of unit 140 and another part sensitive grid of middle part sensing unit 140
Angular range is 60 ° to 120 °.Further, in one embodiment, the extending direction of the sensitive grid of edge sensing unit 120 can
With vertical with the extending direction at edge, the extending direction of the part sensitive grid of middle part sensing unit 140 can sense list with middle part
The extending direction of another part sensitive grid of member 140 is vertical.
Display module 10 can be used for mobile phone, in other embodiments, display module 10 can also be applied to tablet computer,
The arbitrary electronic device such as Wearable.The edge of display screen 200 often is provided with frame, due to originals such as the constraints of frame
It is insufficient compared to the regional deformation amount at middle part by the region of proximal edge because be easy to causeing display screen 200.It is of course also possible to it is other
Reason causes display screen 200 insufficient compared to the regional deformation amount at middle part by the region of proximal edge.
Display screen 200 is often insufficient compared to the regional deformation amount at middle part by the region of proximal edge.When display screen 200 leans on
When the region of proximal edge deforms upon, draw direction is substantially vertical with the extending direction at edge, therefore, by edge sensing unit
The angle of the extending direction of 120 sensitive grid and the extending direction at edge is arranged to 60 ° to 120 °, can improve draw direction
Pressure-sensing capabilities, and then improve the accuracy of pressure detecting.When the region at 200 middle part of display screen deforms upon, stretching side
It is therefore, the extending direction of the part sensitive grid of middle part sensing unit 140 and another part is sensitive to all directions are almost included
The angle of the extending direction of grid is arranged to 60 ° to 120 °, can detect the pressure of all directions in plane, and the region at middle part is general
With enough deformation quantities, it can ensure the accuracy of middle part pressure detecting.
Further, it is in the extending direction of sensitive grid and the angle of extending direction at edge of edge sensing unit 120
In 90 ° of embodiment, the pressure-sensing capabilities of draw direction are optimal.When angle is 90 °, most of edge sensing unit 120
Semaphore can be maximum, angle more deviates that 90 ° of semaphores losses are bigger, and when angle is 60 ° or 120 °, semaphore reduces about
For 14%, if angle is less than 60 ° or more than 120 °, semaphore loss can be excessive.The part sensitive grid of sensing unit 140 at middle part
The angle of extending direction of extending direction and another part sensitive grid be in 90 ° of embodiment, middle part pressure detecting it is accurate
Property is more preferably.When angle is 90 °, the semaphore of middle part sensing unit 140 is maximum, and it is bigger that angle more deviates 90 ° of semaphores losses,
When angle is 60 ° or 120 °, semaphore reduces about 14%, if angle is less than 60 ° or more than 120 °, semaphore loss was understood
Greatly.
In one of the embodiments, display screen 200 can be rectangular, and the edge of display screen 200 includes opposite two
First edge and opposite two second edges.By proximal edge region width for edge to the center of display screen 200 away from
From 10% to 30%.When display screen 200 is deformed upon by the region of proximal edge, draw direction in above-mentioned zone substantially with
The extending direction at edge is vertical.If it is less than edge to the distance at the center of display screen 200 by the width in the region of proximal edge
10%, for arranging that the area of edge sensing unit 120 is too small, it is impossible to preferable to play the highly sensitive of edge sensing unit 120
The detection advantage of degree and accuracy.If it is more than edge to the distance at the center of display screen 200 by the width in the region of proximal edge
30%, it is not known by paracentral position deformation direction, influences detection result.Referring also to Fig. 2, Fig. 3, in one embodiment,
It can include two close to the region at the edge of display screen 200 to lean on close to the region 220 of the first edge of display screen 200 and two
The region 240 of the second edge of nearly display screen 200, the region 260 at the middle part of display screen 200 may refer to Fig. 4.
In one of the embodiments, edge sensing unit 120 includes the first sensing unit 120a and the second sensing unit
120b.First sensing unit 120a is positioned close in the region 220 of the first edge of display screen 200, the first sensing unit
The angular range of the extending direction of the sensitive grid of 120a and the extending direction of first edge is 60 ° to 120 °, can be improved close
Pressure-sensing capabilities in the region 220 of first edge.Second sensing unit 120b be positioned close to display screen 200 with first
In the region 240 of the adjacent second edge in edge, the extending direction of the sensitive grid of the second sensing unit 120b and second edge
The angular range of extending direction is 60 ° to 120 °, can improve the pressure-sensing capabilities in the region 240 of second edge.
In other embodiments, if other are polygon-shaped for triangular in shape, pentagon of display screen 200 etc., edge sensing unit 120 it is quick
The extending direction at the edge that the extending direction of sense grid is adjacent to is vertical.
Further, in one embodiment, in order to accurately detect the pressure of each position, the first sensing unit 120a's
Quantity is multiple, and multiple first sensing unit 120a are distributed in the region 220 of the first edge of display screen 200.Second
The quantity of sensing unit 120b is multiple, and multiple second sensing unit 120b are distributed in the second edge close to display screen 200
In region 240.The quantity of middle part sensing unit 140 is multiple, and multiple middle part sensing units 140 are distributed in display screen 200
In the region in portion.In one embodiment, the region 220 of the first edge close to display screen 200 with close to the of display screen 200
In the region that the region 240 at two edges overlaps, the first sensing unit 120a can be set, the second sensing unit can also be set
120b can also and be not provided with the first sensing unit 120a, also be not provided with the second sensing unit 120b.The region of the coincidence is square
The four corners of shape display screen 200, it is not easy to it deforms, therefore can be by above-mentioned set-up mode, to facilitate processing.
In one embodiment, the areal extent of the sensitive grid of edge sensing unit 120 and middle part sensing unit 140 is
10mm2To 25cm2.The area of sensitive grid can be according to the shape of display screen 200, size and edge sensing unit 120 in
The quantity and distribution density of portion's sensing unit 140 determine.If display module 10 is applied to mobile phone, area is less than 10mm2Then need
Edge sensing unit 120 and middle part sensing unit 140 are that quantity is more, are unfavorable for cabling and reduce cost.If display module 10
Applied to large-scale touch control display, the area of sensitive grid can be larger accordingly, still, if area is more than 25cm2Then may
Pressure can not accurately be detected.
Edge sensing unit 120 and middle part sensing unit 140 are the strain gauge of Wheatstone bridge principle, according to favour stone
The number of bridge arm on electric bridge can be divided into wheatstone bridge, double bridge and full-bridge three types.Edge sensing unit 120 is in
Portion's sensing unit 140 can be full-bridge strain gauge in higher sensitivity.In one embodiment, the four of middle part sensing unit 140
The direction of a bridge arm is vertical two-by-two, and such case is identical with detectability with the sensitivity of double bridge, is suitable for application in deformation
When draw direction almost include all directions, and with enough deformation quantities central region.Four of edge sensing unit 120
The direction of bridge arm is identical, and draw direction that can be detected is single, and detectability is twice of double bridge, is most sensitively to set
Mode, draw direction is single when being suitable for application in deformation, and the insufficient fringe region of deformation quantity.
Referring back to Fig. 1, in one embodiment, pressure sensor module 100 further includes substrate layer, and substrate layer includes opposite the
On one side with the second face.Referring also to Fig. 5, Fig. 6, the sensitive grid of middle part sensing unit 140 include being sequentially connected electrically the first sensitive grid
101st, the second sensitive grid 102, the 3rd sensitive grid 103 and the 4th sensitive grid 104, the first sensitive grid 101 and the 3rd sensitive grid 103
In on the first face, the second sensitive grid 102 and the 4th sensitive grid 104 are located on the second face.Referring also to Fig. 7, the first sensitive grid 101
It is opposite with the position of the second sensitive grid 102 and the 4th sensitive grid 104 with the position of the 3rd sensitive grid 103.Therefore, pressing middle part passes
When feeling unit 140, resistance variations occur simultaneously for the sensitive grid on the first face and the second face, can further improve detection
Sensitivity.
Referring also to Fig. 8, Fig. 9, in one embodiment, the sensitive grid of edge sensing unit 120 also include being sequentially connected electrically
First sensitive grid 101, the second sensitive grid 102, the 3rd sensitive grid 103 and the 4th sensitive grid 104, the first sensitive grid 101 and the 3rd
Sensitive grid 103 is located on the first face, and the second sensitive grid 102 and the 4th sensitive grid 104 are located on the second face.Referring also to Figure 10,
The position of first sensitive grid 101 and the 3rd sensitive grid 103 is opposite with the position of the second sensitive grid 102 and the 4th sensitive grid 104.Figure
Embodiment shown in 8 to Figure 10 can be the sensitive grid of the first sensing unit 120a, and the sensitive grid of the second sensing unit 120b can
With referring to Figure 11 to Figure 13.Therefore during pressing edge sensing unit 120, the sensitive grid on the first face and the second face is simultaneously
Generation resistance variations can further improve the sensitivity of detection.
Referring back to Fig. 5, in one embodiment, the first sensitive grid 101, the second sensitive grid 102, the 3rd sensitive grid 103 and
Four sensitive grids 104 include multiple main part 101a and multiple connecting portion 101b, and multiple main part 101a are set up in parallel and extend
Direction is consistent, and two neighboring main part 101a is connected by connecting portion 101b, connects two connections of same main part 101a
Portion 101b is located at the both ends of main part 101a respectively.
Referring to Fig. 5, the first sensitive grid 101 of middle part sensing unit 140 and multiple main part 101a of the 3rd sensitive grid 103
Extending direction it is consistent, referring to Fig. 6, the second sensitive grid 102 of middle part sensing unit 140 and multiple masters of the 4th sensitive grid 104
The extending direction of body portion 101a is consistent, referring to Fig. 7, the first sensitive grid 101 of middle part sensing unit 140 and the 3rd sensitive grid 103
Main part 101a extending direction and the second sensitive grid 102 of middle part sensing unit 140 and the main part of the 4th sensitive grid 104
The angle of the extending direction of 101a is 90 °, and in other embodiments, angular range can be 60 ° to 120 °.Middle part sensing unit
140 portion body portion 101a and another part main part 101a is in above-mentioned angle, is adapted to detect for the stretching of all directions.Folder
Detection result is optimal when angle is 90 °.Referring to Fig. 8 to Figure 10, the extending direction of multiple main part 101a of edge sensing unit 120
Unanimously, the extending direction of the sensitive grid of edge sensing unit 120 is the extension side of the main part 101a of edge sensing unit 120
To.The extending direction of the main part 101a of edge sensing unit 120 is consistent, is adapted to detect for the stretching of single direction, sensitivity is most
It is high.
In one embodiment, the first sensitive grid 101, the second sensitive grid 102, the 3rd sensitive grid 103 and the 4th sensitive grid 104
Standard resistance range be 120 Ω to 5 × 107Ω.Resistance value gets over that high current is smaller, and the heat of generation is fewer, advantageously reduces temperature
It influences, but the driving voltage of the bigger needs of resistance value is bigger, can increase energy consumption.If resistance value is less than 120 Ω, the heat mistake of generation
Greatly, it is unfavorable for radiating, temperature raises the accuracy that may influence pressure detecting.If resistance value is more than 5 × 107Ω is adapted to therewith
Driving voltage it is excessive, energy consumption is excessive.Further, in one embodiment, the first sensitive grid 101, the second sensitive grid 102,
The more excellent scope of resistance value of three sensitive grids 103 and the 4th sensitive grid 104 is 1 × 103Ω to 5 × 105Ω, if resistance value be less than 1 ×
103Ω, the heat of generation is larger, is unfavorable for radiating, and temperature raises the accuracy that may influence pressure detecting.If resistance value is more than
5×105Ω, the driving voltage being adapted to therewith is larger, and energy consumption is larger.
Referring also to Figure 14 in the above-described embodiments, can set conductive layer as quick in single substrate layer upper and lower surface
Feel grid.First sensitive grid 101, the second sensitive grid 102, the 3rd sensitive grid 103 and 104 head and the tail of the 4th sensitive grid are sequentially connected,
In one embodiment, the through hole 162 through substrate layer can be set at head and the tail, the filling conductive materials 164 in through hole 162, from
And realize electrical connection.
Specifically, referring also to Figure 15, Figure 15 are the Simple figure of middle part sensing unit 140 and edge sensing unit 120,
In one embodiment, first through hole 162, the second through hole 162, third through-hole 162 and fourth hole 162 are offered on substrate layer,
Filled with conductive materials 164 in first through hole 162, the second through hole 162, third through-hole 162 and fourth hole 162, with respectively
Form the first contact 102a, the second contact 102b, the 3rd contact 102c and the 4th contact 102d.The end of first sensitive grid 101
It is electrically connected with the head end of the second sensitive grid 102 by the first contact 102a.The end of second sensitive grid 102 and the 3rd sensitive grid
103 head end is electrically connected by the second contact 102b.The end of 3rd sensitive grid 103 and the head end of the 4th sensitive grid 104 pass through
3rd contact 102c is electrically connected.The head end of the end of 4th sensitive grid 104 and the first sensitive grid 101 passes through the 4th contact 102d electricity
Connection.Sensitive grid is set through the above scheme, facilitates processing, compact in design is reasonable, and is electrically connected reliable.
Referring back to Fig. 1, display module 10 further includes signal wire 182 and detection circuit, and signal wire 182 is by edge sensing unit
120 and middle part sensing unit 140 be respectively connected to detection circuit.Referring also to Figure 16, display module 10 further include power cord
184th, power end, ground wire 186 and ground terminal.Power cord 184 distinguishes edge sensing unit 120 and middle part sensing unit 140
It is connected to power end.Edge sensing unit 120 and middle part sensing unit 140 are respectively connected to ground terminal by ground wire 186.One
In embodiment, the first contact 102a and the 3rd contact 102c are respectively used to the power end and ground terminal of connection display module 10, the
Two point 102b and the 4th contact 102d be respectively used to connection display module 10 detection circuit, convenient for power end, ground terminal
It is connected with detection circuit.
Referring also to Figure 15, in one embodiment, the sensitive grid of edge sensing unit 120 and middle part sensing unit 140
Sensitive grid is respectively formed Wheatstone bridge area 103, and referring back to Fig. 1, signal wire 182 is located at outside Wheatstone bridge area 103.Join again
See Figure 16, in one embodiment, power cord 184 and ground wire 186 are respectively positioned on outside Wheatstone bridge area 103.In an embodiment
In, signal wire 182, power cord 184 and ground wire 186 are first drawn out to display screen 200 by the edge in Wheatstone bridge area 103
Edge, then flexible PCB connecting pin is drawn out to, it is connected afterwards with detection circuit.Due to by the cabling inside display screen 200
Change in resistance can also occur when display screen 200 deforms, therefore, connect again compared to the edge that sensitive grid is guided to display screen 200
Connect signal wire 182, power cord 184 or be grounded 186 mode, by the Wheatstone bridge in Wheatstone bridge area 103 build compared with
In small scope, and signal wire 182, power cord 184 and ground wire 186 are arranged on outside Wheatstone bridge area 103, Neng Goubao
Demonstrate,prove the accuracy of pressure detecting.
In one embodiment, the signal wire 182 inside display screen 200, power cord 184 and the width for being grounded 186
It is 2-500 times of the width of the sensitive grid of edge sensing unit 120, the thicker line width of use can further reduce display
200 deformation of screen influence caused by resistance value.In one embodiment, the signal wire 182 inside display screen 200, power cord 184
The width positioned at 200 edge of display screen can be more than with the width of ground wire 186, relatively narrow line may be employed in edge.
In embodiment shown in Fig. 1, Figure 16 to Figure 18, the sum of edge sensing unit 120 and middle part sensing unit 140
For 12, in other embodiments, the number of sensing unit can be set according to actual demand.
In the embodiment shown in Figure 16, power cord 184 and ground wire 186 are spaced arrangement.The power cord of same row
The ground wire 186 of 184 or same rows can be integrated first, be re-introduced to the edge of display screen 200.Referring to Figure 17, Figure 18, in another reality
It applies in example, power cord 184 and ground wire 186 can be integrated further, specifically, being unit by 184 He of power cord with two rows
Ground wire 186 is intervally arranged, and adjacent two rows of power cords 184 are integrated, and adjacent two rows of ground wires 186 are integrated, are re-introduced to
The edge of display screen 200 is re-introduced to the edge of display screen 200, can save cabling.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (17)
1. a kind of pressure sensor module of display module, for being stacked with the display screen of the display module, feature exists
In the pressure sensor module includes：
Edge sensing unit, for being positioned close in the region at the edge of the display screen, the edge sensing unit it is quick
The angular range for feeling the extending direction of grid and the extending direction at the edge is 60 ° to 120 °；And
Middle part sensing unit, for being arranged in the region at the middle part of the display screen, the part of the middle part sensing unit is quick
Feel the angular range of the extending direction of another part sensitive grid of extending direction and the middle part sensing unit of grid for 60 ° extremely
120°。
2. the pressure sensor module of display module according to claim 1, which is characterized in that the edge sensing unit
The extending direction of sensitive grid is vertical with the extending direction at the edge, the extension side of the part sensitive grid of the middle part sensing unit
It is vertical to the extending direction of another part sensitive grid with the middle part sensing unit.
3. the pressure sensor module of display module according to claim 1, which is characterized in that the edge sensing unit bag
Include the first sensing unit and the second sensing unit；
First sensing unit is used in the region for the first edge for being positioned close to the display screen, and first sensing is single
The angular range of the extending direction of the sensitive grid of member and the extending direction of the first edge is 60 ° to 120 °；
Second sensing unit is used to be positioned close to the second edge adjacent with the first edge of the display screen
In region, the angular range of the extending direction and the extending direction of the second edge of the sensitive grid of second sensing unit is
60 ° to 120 °.
4. the pressure sensor module of display module according to claim 3, which is characterized in that first sensing unit
Quantity is multiple, and multiple first sensing units are distributed in the region of the first edge of the close display screen；
The quantity of second sensing unit is multiple, and multiple second sensing units are distributed in the close display screen
Second edge region in；
The quantity of the middle part sensing unit is multiple, and multiple middle part sensing units are distributed in the middle part of the display screen
In region.
5. the pressure sensor module of display module according to claim 4, which is characterized in that in the close display
In the region of the area coincidence of the second edge of the region of the first edge of screen and close the display screen, setting described the
One sensing unit sets second sensing unit or is not provided with first sensing unit and second sensing unit.
6. the pressure sensor module of display module according to claim 1, which is characterized in that the edge sensing unit and
The middle part sensing unit is full-bridge strain gauge.
7. the pressure sensor module of display module according to claim 1, which is characterized in that substrate layer is further included, it is described
Substrate layer includes opposite the first face and the second face；
The sensitive grid of the edge sensing unit and the middle part sensing unit includes being sequentially connected electrically the first sensitive grid, second
Sensitive grid, the 3rd sensitive grid and the 4th sensitive grid, first sensitive grid and the 3rd sensitive grid are located on first face,
Second sensitive grid and the 4th sensitive grid are located on second face；First sensitive grid and the 3rd sensitive grid
Position it is opposite with the position of second sensitive grid and the 4th sensitive grid.
8. the pressure sensor module of display module according to claim 7, which is characterized in that first sensitive grid, institute
Stating the second sensitive grid, the 3rd sensitive grid and the 4th sensitive grid includes multiple main parts and multiple connecting portions, multiple
The main part is set up in parallel and extending direction is consistent, and the two neighboring main part is connected by the connecting portion, and connection is same
Two connecting portions of one main part are located at the both ends of the main part respectively；
The extending direction of multiple main parts of the edge sensing unit is consistent, the sensitive grid of the edge sensing unit
Extending direction is the extending direction of the main part of the edge sensing unit；
The extension side of first sensitive grid of the middle part sensing unit and multiple main parts of the 3rd sensitive grid
To consistent, the extension of second sensitive grid of the middle part sensing unit and multiple main parts of the 4th sensitive grid
Direction is consistent, the extension side of first sensitive grid of the middle part sensing unit and the main part of the 3rd sensitive grid
To the extending direction of the main part of second sensitive grid and the 4th sensitive grid with the middle part sensing unit
Angular range is 60 ° to 120 °.
9. the pressure sensor module of display module according to claim 7, which is characterized in that offered on the substrate layer
First through hole, the second through hole, third through-hole and fourth hole, the first through hole, second through hole, the third through-hole and
It is connect in the fourth hole filled with conductive materials with being respectively formed the first contact, the second contact, the 3rd contact and the 4th
Point；
The head end of the end of first sensitive grid and second sensitive grid is electrically connected by first contact；Described second
The head end of the end of sensitive grid and the 3rd sensitive grid is electrically connected by second contact；The end of 3rd sensitive grid
It is electrically connected with the head end of the 4th sensitive grid by the 3rd contact；The end of 4th sensitive grid and described first quick
The head end of sense grid is electrically connected by the 4th contact.
10. the pressure sensor module of display module according to claim 9, which is characterized in that first contact and institute
State power end and ground terminal that the 3rd contact is respectively used to connect the display module；Second contact and the 4th contact
It is respectively used to connect the detection circuit of the display module.
11. the pressure sensor module of display module according to claim 7, which is characterized in that first sensitive grid, institute
The Standard resistance range for stating the second sensitive grid, the 3rd sensitive grid and the 4th sensitive grid is 120 Ω to 5 × 107Ω。
12. the pressure sensor module of display module according to claim 11, which is characterized in that first sensitive grid,
The Standard resistance range of second sensitive grid, the 3rd sensitive grid and the 4th sensitive grid is 1 × 103Ω to 5 × 105Ω。
13. the pressure sensor module of display module according to claim 7, which is characterized in that the edge sensing unit
Areal extent with the sensitive grid of the middle part sensing unit is 10mm2To 25cm2。
A kind of 14. display module, which is characterized in that the pressure including display screen and as any one of claim 1 to 13
Sensory package；Display screen and pressure sensor module are stacked；The edge sensing unit is positioned close to the display screen
In the region at edge, in the region at the middle part that the middle part sensing unit is arranged on the display screen.
15. display module according to claim 14, which is characterized in that the display screen is rectangular, described close to described
The width in the region at edge is the edge to the 10% to 30% of the distance at the center of the display screen.
16. display module according to claim 14, which is characterized in that further include signal wire and detection circuit, the letter
The edge sensing unit and the middle part sensing unit are respectively connected to the detection circuit by number line；The edge sensing is single
The sensitive grid of member and the sensitive grid of the middle part sensing unit are respectively formed Wheatstone bridge area, and the signal wire is located at the favour
Outside stone electric bridge area；
The display module further includes power cord, power end, ground wire and ground terminal；The power cord senses the edge single
First and described middle part sensing unit is respectively connected to the power end；It is described ground wire by the edge sensing unit and it is described in
Portion's sensing unit is respectively connected to the ground terminal；The power cord and it is described ground wire be respectively positioned on the Wheatstone bridge area it
Outside.
17. display module according to claim 16, which is characterized in that the signal inside the display screen
The width of line, the power cord and the ground wire is 2-500 times of the width of the sensitive grid of the edge sensing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720881241.0U CN207458005U (en) | 2017-07-19 | 2017-07-19 | Display module and its pressure sensor module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720881241.0U CN207458005U (en) | 2017-07-19 | 2017-07-19 | Display module and its pressure sensor module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207458005U true CN207458005U (en) | 2018-06-05 |
Family
ID=62248780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720881241.0U Active CN207458005U (en) | 2017-07-19 | 2017-07-19 | Display module and its pressure sensor module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207458005U (en) |
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2017
- 2017-07-19 CN CN201720881241.0U patent/CN207458005U/en active Active
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Effective date of registration: 20210420 Address after: 231323 Building 1, precision electronics industrial park, Hangbu Town, Shucheng County, Lu'an City, Anhui Province Patentee after: Anhui jingzhuo optical display technology Co.,Ltd. Address before: 330000 Jiangxi city of Nanchang province Huangjiahu road Nanchang economic and Technological Development Zone Patentee before: Nanchang OFilm Tech. Co.,Ltd. |
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