CN107239174A - Display module and its pressure sensor module - Google Patents
Display module and its pressure sensor module Download PDFInfo
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- CN107239174A CN107239174A CN201710591541.XA CN201710591541A CN107239174A CN 107239174 A CN107239174 A CN 107239174A CN 201710591541 A CN201710591541 A CN 201710591541A CN 107239174 A CN107239174 A CN 107239174A
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- sensing unit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2262—Measuring circuits therefor involving simple electrical bridges
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention relates to a kind of display module and its pressure sensor module, above-mentioned pressure sensor module includes edge sensing unit and middle part sensing unit, edge sensing unit is put in the region close to the edge of display screen, and the angular range of the bearing of trend of the sensitive grid of edge sensing unit and the bearing of trend 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 bearing of trend of the part sensitive grid of middle part sensing unit and the bearing of trend of another part sensitive grid of middle part sensing unit is 60 ° to 120 °.When display screen is deformed upon close to the region at edge, draw direction is vertical substantially with the bearing of trend at edge, the angle of the bearing of trend of the sensitive grid of edge sensing unit and the bearing of trend at edge is set 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 present invention relates to the technical field of display device, more particularly to a kind of display module and its pressure sensor module.
Background technology
The pressure sensitive scheme of traditional touch display field, typically 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.But Z axis
The deformation in direction can be directly extruded 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 avoid the influence that directly extruding display screen is caused, but if will be traditional
X/Y plane shape changing detection structure is applied to touch display screen, it is impossible to meet the requirement of accuracy.
The content of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of high display module of pressure detecting accuracy and its pressure
Sensory package.
A kind of pressure sensor module of display module, is stacked for the display screen with the display module, the pressure
Power sensory package includes：
In edge sensing unit, the region for the edge for being positioned close to the display screen, the edge sensing unit
The angular range of bearing of trend at bearing of trend and the edge of sensitive grid be 60 ° to 120 °；And
In middle part sensing unit, the region for the middle part for being arranged on the display screen, the portion of the middle part sensing unit
The angular range for dividing the bearing of trend of the bearing of trend 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, region regional deformation amount compared to middle part of the display screen close to edge
It is often not enough.When display screen is deformed upon close to the region at edge, draw direction is vertical substantially with the bearing of trend at edge, because
This, 60 ° to 120 ° are set to by the angle of the bearing of trend of the sensitive grid of edge sensing unit and the bearing of trend 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 angle more deviates 90 ° of semaphores and loses bigger, when angle is 60 ° or 120 °, signal
Amount reduction 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 bearing of trend of the part sensitive grid of middle part sensing unit with
The angle of the bearing of trend of another part sensitive grid is set to 60 ° to 120 °, can detect the pressure of all directions in plane, in
The region in portion typically has enough deformation quantities, ensure that the accuracy of middle part pressure detecting.When angle is 90 °, middle part
The semaphore of sensing unit is maximum, and angle more deviates 90 ° of semaphores and loses bigger, when angle is 60 ° or 120 °, semaphore drop
Low by 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 bearing of trend of the sensitive grid of the edge sensing unit and the edge
Direction is vertical, and another part of the bearing of trend of the part sensitive grid of the middle part sensing unit and the middle part sensing unit is quick
The bearing of trend for feeling grid is vertical.When display screen is deformed upon close to the region at edge, extension of the draw direction substantially with edge
Direction is vertical, therefore, the bearing of trend of the sensitive grid of edge sensing unit is vertical with the bearing of trend at edge, improves stretching side
To pressure-sensing capabilities technique effect it is optimal.When region in the middle part of display screen is deformed upon, draw direction almost includes
All directions, therefore, by the bearing of trend of the part sensitive grid of middle part sensing unit and the bearing of trend of another part sensitive grid
It is set to vertically, 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 to be positioned close in the region of the first edge of the display screen, and described first passes
The bearing of trend of sensitive grid and the angular range of the bearing of trend of the first edge for feeling unit are 60 ° to 120 °；
Second sensing unit is used for second side adjacent with the first edge for being positioned close to the display screen
In the region of edge, the angle model of the bearing of trend of the sensitive grid of second sensing unit and the bearing of trend of the second edge
Enclose 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 be improved 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 described in the region of the first edge of the 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.
Because the quantity of the first sensing unit, the second sensing unit and middle part sensing unit is multiple, be therefore, it can
Accurately detect the pressure of each position.
In one of the embodiments, in the region of the first edge close to the display screen 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.Deformation is less likely to occur in the region of coincidence, 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, in addition to substrate layer, the substrate layer includes relative 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 relative 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 bearing of trend 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 two ends of the main part；
The bearing of trend of multiple main parts of the edge sensing unit is consistent, the sensitivity of the edge sensing unit
The bearing of trend of grid is the bearing of trend 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 direction consistent, second sensitive grid of the middle part sensing unit and multiple main parts of the 4th sensitive grid
Bearing of trend 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 of direction and the middle part sensing unit and the main part of the 4th sensitive grid
To angular range be 60 ° to 120 °.
The bearing of trend 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 is in above-mentioned angle with another part main part, is adapted to detect for the stretching of all directions.
In one of the embodiments, first through hole, the second through hole, third through-hole and the 4th are offered on the substrate layer
Conductive materials are filled with through hole, the first through hole, second through hole, the third through-hole and the fourth hole,
To form the first contact, the second contact, the 3rd contact and the 4th contact respectively；
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, convenient processing, compact in design are set by such scheme
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 earth terminal；Second contact and the 4th contact are respectively used to connect the detection electricity of the display module
Road.Therefore it is easy to be connected with power end, earth 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；Accordingly, second contact and described
4th contact can also be respectively used to connect the power end and earth 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 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 is bigger, can increase energy consumption.If resistance is less than 120 Ω, production
Raw heat is excessive, is unfavorable for radiating, and temperature rise may influence the accuracy of pressure detecting.If resistance 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 is less than 1 × 103Ω, the heat of generation is larger,
It is unfavorable for radiating, temperature rise may influence the accuracy of pressure detecting.If resistance 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
Enclose for 10mm2To 25cm2.The area of sensitive grid can be according to display screen shape, size, and edge sensing unit and middle part
The quantity and distribution density of sensing unit are determined.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.If display module is aobvious 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, it is characterised in that including display screen and described pressure sensor module；Display screen and pressure are passed
Sense component is stacked；The edge sensing unit is positioned close in the region at the edge of the display screen, and the middle part is passed
Sense unit is arranged in the region at the middle part of the display screen.
Above-mentioned display module, display screen is often not enough compared to the regional deformation amount at middle part close to the region at edge.When aobvious
When display screen is deformed upon close to the region at edge, draw direction is vertical substantially with the bearing of trend at edge, and therefore, edge is sensed
The angle of the bearing of trend of the sensitive grid of unit and the bearing of trend at edge is set 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 is deformed upon, draw direction
Almost include all directions, therefore, by the bearing of trend of the part sensitive grid of middle part sensing unit and another part sensitive grid
The angle of bearing of trend is set to 60 ° to 120 °, can detect the pressure of all directions in plane, and the region at middle part typically has
Enough deformation quantities, ensure that the accuracy of middle part pressure detecting.
In one of the embodiments, the display screen is rectangular, and the width in the region close to the 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 close to the region at edge,
Draw direction in above-mentioned zone is vertical substantially with the bearing of trend at edge.If the width close to the region at edge is less than 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 the width close to the region at edge is more than edge to display screen
Center distance 30%, it is uncertain by paracentral position deformation direction, influence Detection results.
In one of the embodiments, in addition to signal wire and detection circuit, the signal wire senses the edge single
First and described middle part sensing unit is respectively connecting to the detection circuit；The sensitive grid of the edge sensing unit and the middle part
The sensitive grid of sensing unit forms Wheatstone bridge area respectively, and the signal wire is located at outside the Wheatstone bridge area；
The display module also includes power line, power end, ground wire and earth terminal；The power line passes the edge
Sense unit and the middle part sensing unit are respectively connecting to the power end；The ground wire is by the edge sensing unit and institute
State middle part sensing unit and be respectively connecting to the earth terminal；The power line and the ground wire are respectively positioned on the Wheatstone bridge
Outside area.
Because when display screen is deformed change in resistance can also occur for the cabling inside process display screen, therefore, compared to general
Sensitive grid guides to the mode of edge reconnection signal wire, power line or the ground wire of display screen, by the Hui Si in Wheatstone bridge area
Energization bridge is built in less scope, and signal wire, power line and ground wire are arranged on outside Wheatstone bridge area, can
Ensure the accuracy of pressure detecting.
Wheatstone bridge area of Wheatstone bridge area of Wheatstone bridge area of Wheatstone bridge area
In one of the embodiments, inside the display screen the signal wire, the power line 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 enter one using thicker line width
The influence that the reduction display screen deformation of step is caused to resistance.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
The accompanying drawing of other embodiment is obtained according to these accompanying drawings.
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 the 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 the 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 the display module shown in Fig. 1；
Fig. 5 is the first sensitive grid and the schematic diagram of the 3rd sensitive grid of the middle part sensing unit of the display module shown in Fig. 1；
Fig. 6 is the second sensitive grid and the schematic diagram of the 4th sensitive grid of the middle part sensing unit of the display module shown in Fig. 1；
Fig. 7 is that the folded of first to fourth sensitive grid of the middle part sensing unit of the display module shown in Fig. 1 sets schematic diagram；
Fig. 8 is the first sensitive grid and the schematic diagram of the 3rd sensitive grid of the first sensing unit of the display module shown in Fig. 1；
Fig. 9 is the second sensitive grid and the schematic diagram of the 4th sensitive grid of the first sensing unit of the display module shown in Fig. 1；
Figure 10 is that the folded of first to fourth sensitive grid of the first sensing unit of the 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 the 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 the 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 the display module shown in Fig. 1 sets schematic diagram；
Figure 14 is the middle part sensing unit and the partial cutaway schematic of edge sensing unit of the display module shown in Fig. 1；
Figure 15 is the middle part sensing unit and the simple schematic diagram of edge sensing unit of the display module shown in Fig. 1；
Figure 16 is the power line and the cabling schematic diagram of ground wire of the display module shown in Fig. 1；
Figure 17 is the cabling schematic diagram of the signal wire of display module in another embodiment；
Figure 18 is the power line and the cabling schematic diagram of ground wire of the display module shown in Figure 17.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose that these embodiments are provided be make to the disclosure more it is thorough comprehensively.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
As shown in figure 1, the display module 10 of an embodiment includes the pressure sensor module 100 and display screen being stacked
200, pressure sensor module 100 includes edge sensing unit 120 and middle part sensing unit 140, and edge sensing unit 120 is arranged on
In the region at the edge of display screen 200, the bearing of trend of the sensitive grid of edge sensing unit 120 and the bearing of trend at edge
Angular range be 60 ° to 120 °.Middle part sensing unit 140 is arranged in the region at the middle part of display screen 200, and middle part sensing is single
The angle of the bearing of trend of the part sensitive grid of member 140 and the bearing of trend of another part sensitive grid of middle part sensing unit 140
Scope is 60 ° to 120 °.Further, in one embodiment, the bearing of trend of the sensitive grid of edge sensing unit 120 can be with
The bearing of trend at edge is vertical, and the bearing of trend of the part sensitive grid of middle part sensing unit 140 can be with middle part sensing unit 140
Another part sensitive grid bearing of trend it is vertical.
Display module 10 can be used for mobile phone, in other embodiments, display module 10 can also be applied to tablet personal computer,
Any 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 not enough compared to the regional deformation amount at middle part close to the region at edge because easily causing display screen 200.It is of course also possible to be other
Reason causes display screen 200 not enough compared to the regional deformation amount at middle part close to the region at edge.
Display screen 200 is often not enough compared to the regional deformation amount at middle part close to the region at edge.When display screen 200 is close
When the region at edge is deformed upon, draw direction is vertical substantially with the bearing of trend at edge, therefore, by edge sensing unit 120
The bearing of trend of sensitive grid and the angle of bearing of trend at edge be set to 60 ° to 120 °, the pressure of draw direction can be improved
Power detectability, and then improve the accuracy of pressure detecting.When the region at the middle part of display screen 200 is deformed upon, draw direction
Almost include all directions, therefore, by the bearing of trend of the part sensitive grid of middle part sensing unit 140 and another part sensitive grid
The angle of bearing of trend be set to 60 ° to 120 °, the pressure of all directions in plane can be detected, the region at middle part typically has
There are enough deformation quantities, ensure that the accuracy of middle part pressure detecting.
Further, it is in the bearing of trend of sensitive grid and the angle of bearing of trend 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 is reduced 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 bearing of trend of bearing of trend and another part sensitive grid be 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 angle more deviates 90 ° of semaphores and loses bigger,
When angle is 60 ° or 120 °, semaphore reduction 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 with rectangular, and the edge of display screen 200 includes relative two
First edge and two relative second edges.Close to 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 close to the region at edge, draw direction in above-mentioned zone substantially with
The bearing of trend at edge is vertical.If the width close to the region at edge is less than edge to the distance at the center of display screen 200
10%, for arranging that the area of edge sensing unit 120 is too small, it is impossible to preferably play the highly sensitive of edge sensing unit 120
The detection advantage of degree and accuracy.If the width close to the region at edge is more than edge to the distance at the center of display screen 200
30%, it is uncertain by paracentral position deformation direction, influence Detection results.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 bearing of trend of 120a sensitive grid and the bearing of trend 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 bearing of trend of the second sensing unit 120b sensitive grid and second edge
The angular range of bearing of trend 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 bearing of trend at the edge that the bearing of trend 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
Sensing unit 120b quantity 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 is overlapped, the first sensing unit 120a can be set, the second sensing unit can also be set
120b, and can also 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
At the corner of shape display screen 200, it is not easy to deform, 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 display screen 200 shape, size, and edge sensing unit 120 and in
The quantity and distribution density of portion's sensing unit 140 are determined.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 with
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 individual 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 the 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 not enough fringe region of deformation quantity.
Referring back to Fig. 1, in one embodiment, pressure sensor module 100 also includes substrate layer, and substrate layer includes relative the
Simultaneously 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 relative 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 is passed
When feeling unit 140, simultaneously resistance variations occur 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 relative 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 first sensing unit 120a sensitive grid, and the second sensing unit 120b sensitive grid 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 sent out simultaneously
Raw 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 extended
Direction is consistent, and two neighboring main part 101a is connected by connecting portion 101b, connects same main part 101a two connections
Portion 101b is located at main part 101a two ends respectively.
Referring to Fig. 5, the first sensitive grid 101 and multiple main part 101a of the 3rd sensitive grid 103 of middle part sensing unit 140
Bearing of trend 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
Body portion 101a bearing of trend 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 bearing of trend 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 101a bearing of trend is 90 °, in other embodiments, and 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.Angle
For 90 ° when Detection results it is optimal.Referring to Fig. 8 to Figure 10, multiple main part 101a of edge sensing unit 120 bearing of trend one
Cause, the bearing of trend that the bearing of trend of the sensitive grid of edge sensing unit 120 is the main part 101a of edge sensing unit 120.
The main part 101a of edge sensing unit 120 bearing of trend is consistent, is adapted to detect for the stretching of single direction, sensitivity highest.
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 gets over that high current is smaller, and the heat of generation is fewer, advantageously reduces temperature
Influence, but the driving voltage of the bigger needs of resistance is bigger, can increase energy consumption.If resistance is less than 120 Ω, the heat mistake of generation
Greatly, it is unfavorable for radiating, temperature rise may influence the accuracy of pressure detecting.If resistance 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 of three sensitive grids 103 and the 4th sensitive grid 104 is 1 × 103Ω to 5 × 105Ω, if resistance be less than 1 ×
103Ω, the heat of generation is larger, is unfavorable for radiating, and temperature rise may influence the accuracy of pressure detecting.If resistance 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 the head and the tail of the 4th sensitive grid 104 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,
Conductive materials 164 are filled with 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
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 by such scheme, convenient processing, compact in design rationally, and is electrically connected reliable.
Referring back to Fig. 1, display module 10 also 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 connecting to detect circuit.Referring also to Figure 16, display module 10 also includes power line
184th, power end, ground wire 186 and earth terminal.Power line 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 connecting to earth terminal by ground wire 186.One
In embodiment, the first contact 102a and the 3rd contact 102c are respectively used to connect the power end and earth terminal of display module 10, the
Two point 102b and the 4th contact 102d are respectively used to connect the detection circuit of display module 10, are easy to and power end, earth terminal
With detection circuit connection.
Referring also to Figure 15, in one embodiment, the sensitive grid of edge sensing unit 120 and middle part sensing unit 140
Sensitive grid forms Wheatstone bridge area 103 respectively, 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 line 184 and ground wire 186 are respectively positioned on outside Wheatstone bridge area 103.In an embodiment
In, signal wire 182, power line 184 and ground wire 186 are first drawn out to the side of display screen 200 by the edge in Wheatstone bridge area 103
Edge, then flexible PCB connection end is drawn out to, it is connected afterwards with detection circuit.Due to existing by the cabling inside display screen 200
When deforming change in resistance can also occur for display screen 200, therefore, be reconnected compared to the edge that sensitive grid is guided to display screen 200
The mode of signal wire 182, power line 184 or ground wire 186, the Wheatstone bridge in Wheatstone bridge area 103 is built smaller
In the range of, and signal wire 182, power line 184 and ground wire 186 are arranged on outside Wheatstone bridge area 103, it ensure that
The accuracy of pressure detecting.
In one embodiment, inside display screen 200 width of signal wire 182, power line 184 and ground wire 186
It is 2-500 times of the width of the sensitive grid of edge sensing unit 120, display can be further reduced using thicker line width
The influence that the deformation of screen 200 is caused to resistance.In one embodiment, inside display screen 200 signal wire 182, power line 184
The width positioned at the edge of display screen 200 can be more than with the width of ground wire 186, edge can use narrower line.
In embodiment shown in Fig. 1, Figure 16 to Figure 18, the sum of edge sensing unit 120 and middle part sensing unit 140 is
12, in other embodiments, the number of sensing unit can be set according to actual demand.
In the embodiment shown in Figure 16, power line 184 and ground wire 186 are spaced arrangement.The power line of same row
The ground wire 186 of 184 or same rows can be first integrated, is re-introduced to the edge of display screen 200.Referring to Figure 17, Figure 18, in another reality
Apply in example, power line 184 and ground wire 186 can be further integrated, specifically, by unit of two rows by the He of power line 184
Ground wire 186 is intervally arranged, and adjacent two row's power lines 184 are integrated, and adjacent two row's ground wires 186 are integrated, is 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
Apply 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 of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (17)
1. a kind of pressure sensor module of display module, is stacked, its feature exists for the display screen with the display module
In the pressure sensor module includes：
In edge sensing unit, the region for the edge for being positioned close to the display screen, the edge sensing unit it is quick
The angular range for feeling the bearing of trend of grid and the bearing of trend at the edge is 60 ° to 120 °；And
In middle part sensing unit, the region for the middle part for being arranged on the display screen, the part of the middle part sensing unit is quick
Feel another part sensitive grid of bearing of trend and the middle part sensing unit of grid bearing of trend angular range for 60 ° extremely
120°。
2. the pressure sensor module of display module according to claim 1, it is characterised in that the edge sensing unit
The bearing of trend of sensitive grid is vertical with the bearing of trend at the edge, the extension side of the part sensitive grid of the middle part sensing unit
To vertical with the bearing of trend of another part sensitive grid of the middle part sensing unit.
3. the pressure sensor module of display module according to claim 1, it is characterised in that the edge sensing unit bag
Include the first sensing unit and the second sensing unit；
First sensing unit is used to be positioned close in the region of the first edge of the display screen, and first sensing is single
The angular range of the bearing of trend of the sensitive grid of member and the bearing of trend of the first edge is 60 ° to 120 °；
Second sensing unit is used for the second edge adjacent with the first edge for being positioned close to the display screen
In region, the angular range of the bearing of trend and the bearing of trend 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, it is characterised in that first sensing unit
Quantity is multiple, and multiple first sensing units are distributed in described in the region of the first edge of the display screen；
The quantity of second sensing unit is multiple, and multiple second sensing units are distributed in described close to the 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, it is characterised in that described close to the display
The region of the first edge of screen is with the region of the area coincidence of the second edge close to 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, it is characterised 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, it is characterised in that also including substrate layer, described
Substrate layer includes relative 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 relative with the position of second sensitive grid and the 4th sensitive grid.
8. the pressure sensor module of display module according to claim 7, it is characterised 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 bearing of trend 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 two ends of the main part respectively；
The bearing of trend of multiple main parts of the edge sensing unit is consistent, the sensitive grid of the edge sensing unit
Bearing of trend is the bearing of trend 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 with the bearing of trend of the main part of second sensitive grid and the 4th sensitive grid of the middle part sensing unit
Angular range is 60 ° to 120 °.
9. the pressure sensor module of display module according to claim 7, it is characterised 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
Conductive materials are filled with the fourth hole, are connect with forming the first contact, the second contact, the 3rd contact and the 4th respectively
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
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, it is characterised in that first contact and institute
State power end and earth 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, it is characterised 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, it is characterised 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, it is characterised in that the edge sensing unit
Areal extent with the sensitive grid of the middle part sensing unit is 10mm2To 25cm2。
14. a kind of display module, it is characterised 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, the middle part sensing unit is arranged in the region at the middle part of the display screen.
15. display module according to claim 14, it is characterised 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, it is characterised in that also including signal wire and detection circuit, the letter
The edge sensing unit and the middle part sensing unit are respectively connecting 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 form Wheatstone bridge area respectively, and the signal wire is located at the favour
Outside stone electric bridge area；
The display module also includes power line, power end, ground wire and earth terminal；The power line senses the edge single
First and described middle part sensing unit is respectively connecting to the power end；The ground wire by the edge sensing unit and it is described in
Portion's sensing unit is respectively connecting to the earth terminal；The power line and the ground wire be respectively positioned on the Wheatstone bridge area it
Outside.
17. display module according to claim 16, it is characterised in that the signal inside the display screen
The width of line, the power line and the ground wire is 2-500 times of the width of the sensitive grid of the edge sensing unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710591541.XA CN107239174A (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 |
|---|---|---|---|
| CN201710591541.XA CN107239174A (en) | 2017-07-19 | 2017-07-19 | Display module and its pressure sensor module |
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| Publication Number | Publication Date |
|---|---|
| CN107239174A true CN107239174A (en) | 2017-10-10 |
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ID=59990691
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710591541.XA Pending CN107239174A (en) | 2017-07-19 | 2017-07-19 | Display module and its pressure sensor module |
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2017
- 2017-07-19 CN CN201710591541.XA patent/CN107239174A/en active Pending
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