CN107315503A - A kind of display device - Google Patents
A kind of display device Download PDFInfo
- Publication number
- CN107315503A CN107315503A CN201710522420.XA CN201710522420A CN107315503A CN 107315503 A CN107315503 A CN 107315503A CN 201710522420 A CN201710522420 A CN 201710522420A CN 107315503 A CN107315503 A CN 107315503A
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- China
- Prior art keywords
- pressure sensing
- sensing cells
- protection board
- display panel
- groove
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
Abstract
The invention provides a kind of display device, it is related to display technology field, including：Display screen, display screen includes display panel and protection board, protection board covering display panel；Knee wall, knee wall is used to provide support in rim area for protection board；Multiple grooves, groove is located on knee wall, and groove has one first opening towards display panel；Multiple pressure sensing cells, multiple pressure sensing cells are located at non-display area, at least there are the multiple pressure sensing cells in part, wherein, at least corresponded for each pressure sensing cells in the part in the presence of a groove；Pressure sensing cells have orthographic projection S1 on protection board; groove corresponding with pressure sensing cells has orthographic projection S2 on protection board; the edge adjacent with groove has the first bearing of trend in protection board, and orthographic projection S1 and orthographic projection S2 is mutually overlapped on the direction perpendicular to the first bearing of trend.The present invention provides a kind of display device, to realize the detectivity for improving pressure sensing cells.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of display device.
Background technology
At present, the display panel with touch controllable function is widely used in mobile phone, flat board as a kind of information input tool
In the various display products such as computer, the information enquiry machine in public place hall.So, user only needs to finger touch display panel
On mark can be realized as operation to the electronic equipment, eliminate user to other equipment (such as keyboard and mouse) according to
Rely, make man-machine interaction more simple.
In order to preferably meet the demand of user, generally it is provided for detecting user's touch display panel in display panel
When touch-control pressure value size pressure sensing cells, display panel is gathered position of touch information, and can
The size of touch-control pressure value is gathered, to enrich the application of touch-control Display Technique.
Pressure sensing cells realize the detection to touch-control pressure value by sensing stress in both direction or strain, and
When pressure sensing cells to be arranged to the non-display area of display panel, the deformation quantity that pressure sensing cells occur is smaller, causes pressure
The detectivity of power sensing unit is not high, and the problems demand is solved.
The content of the invention
The present invention provides a kind of display device, to realize the detectivity for improving pressure sensing cells.
The embodiments of the invention provide a kind of display device, including：
Display screen, the display screen includes display panel and protection board, and the protection board covers the display panel；
The display panel includes viewing area and the non-display area around the viewing area；
The protection board includes display panel conformable region and the rim area around the display panel conformable region, wherein, institute
State region of the display panel conformable region corresponding to orthographic projection of the display panel on the protection board；
Knee wall, the knee wall is used to provide support in the rim area for the protection board；
Multiple grooves, the groove is located on the knee wall, and the groove has one first opening described in
Display panel；
Multiple pressure sensing cells, the multiple pressure sensing cells are located at the non-display area, at least there is part institute
Multiple pressure sensing cells are stated, wherein, at least exist described in one for each pressure sensing cells in the part
Groove is corresponded；
The pressure sensing cells have orthographic projection S1, institute corresponding with the pressure sensing cells on the protection board
Stating groove, there is edge adjacent with the groove in orthographic projection S2, the protection board to have the first extension on the protection board
Direction, the orthographic projection S1 and orthographic projection S2 is mutually overlapped on the direction perpendicular to first bearing of trend.
The display device that the present invention is provided includes display screen, knee wall and multiple pressure sensing cells, and display screen includes aobvious
Show the protection board of panel and covering display panel, protection board plays a part of protecting display panel from external world's abrasion equivalent damage,
Display panel includes viewing area and the non-display area around viewing area, and multiple pressure sensing cells are located at the non-display of display panel
Set fluted on area, knee wall, groove has the first opening towards display panel, and in multiple pressure sensing cells extremely
Small part is corresponding with groove, and each pressure sensing cells in the pressure sensing cells corresponding with groove can be with one
Or multiple grooves are corresponding.Pressure sensing cells are corresponding with groove to refer to that pressure sensing cells have just on protection board
S1 is projected, groove corresponding with pressure sensing cells has side adjacent with groove in orthographic projection S2, protection board on protection board
Edge has the first bearing of trend, and orthographic projection S1 and orthographic projection S2 is mutually overlapped on the direction perpendicular to the first bearing of trend.This
The display device provided is provided, by setting the groove corresponding with pressure sensing cells, when applying pressure to display panel, increased
The deformation quantity of the pressure sensing cells added, so as to improve the detectivity of pressure sensing cells.
Brief description of the drawings
Fig. 1 a are a kind of overlooking the structure diagram of display device provided in an embodiment of the present invention；
Fig. 1 b are the cross-sectional view in the AA ' directions along along Fig. 1 a；
Fig. 1 c are the perspective view of pressure sensing cells and groove on protection board in region S0 in Fig. 1 a；
Fig. 2 is the cross-sectional view of another display device provided in an embodiment of the present invention；
Fig. 3 is the overlooking the structure diagram of another display device provided in an embodiment of the present invention；
Fig. 4 is the cut-away section structural representation of another display device provided in an embodiment of the present invention；
Fig. 5 is the cut-away section structural representation of another display device provided in an embodiment of the present invention；
Fig. 6 is the cross-sectional view of another display device provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of pressure sensing cells provided in an embodiment of the present invention；
Fig. 8 a are the structural representation of another pressure sensing cells provided in an embodiment of the present invention；
Fig. 8 b are the equivalent circuit diagram of pressure sensing cells shown in Fig. 8 a.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Fig. 1 a are a kind of overlooking the structure diagram of display device provided in an embodiment of the present invention, and Fig. 1 b are along along Fig. 1 a
The cross-sectional view in AA ' directions, Fig. 1 c are the throwing of pressure sensing cells and groove on protection board in region S0 in Fig. 1 a
Shadow schematic diagram, with reference to shown in Fig. 1 a, Fig. 1 b and Fig. 1 c, display device provided in an embodiment of the present invention includes display screen 10, support
Wall 20 and multiple pressure sensing cells 40.Wherein, display screen 10 includes display panel 11 and protection board 12, and the covering of protection board 12 is aobvious
Show panel 10, display panel 11 includes viewing area 111 and the non-display area 112 around viewing area 111, and protection board 12 includes display
Panel attachment area 121 and the rim area 122 around display panel conformable region 121, display panel conformable region 121 are display panel 11
The region corresponding to orthographic projection on protection board 12, knee wall 20 is used to be that protection board 12 provides support in rim area 122, enters
And be display panel 11 provide support, because display panel 11 is not contacted directly with knee wall 20, when ambient pressure be applied to it is aobvious
When in display screen 10, it is to avoid stress concentration is on display panel 11, it is ensured that display panel 11 can normally realize display and
The functions such as touch-control.
Fluted 30 are set on knee wall 20, and there is one first opening 31 towards display panel 11 in groove 30, it is multiple
Pressure sensing cells 40 are located at non-display area 112, at least there is partial pressure sensing unit 40, wherein, in the part
Each pressure sensing cells 40 are at least corresponded in the presence of a groove 30, and display device bag is exemplarily set in Fig. 1 a
Include four pressure sensing cells 40, correspond respectively in the four edges of display device one of each pressure sensing cells 40, four
There are three pressure sensing cells 40 nearby to set fluted 30 in individual pressure sensing cells 40, another pressure sensing cells 40 is attached
Groove 30 closely is not provided with, when carrying out pressure touch to display device, display panel 11 and protection board 12 will be sent out due to pressure
Deformation is conducted to protection board 12 and display panel 11 near pressure sensing cells 40, groove 30 by raw deformation, display panel 11
Will occur bigger deformation, therefore nearby set fluted 30 three pressure sensing cells 40 also to occur bigger shape
Become, and the deformation quantity that another pressure sensing cells 40 for being nearby not provided with groove 30 occur is smaller.In order to ensure 30 pairs of groove
Deformed upon in enhancing pressure sensing cells 40 with enough influences, the embodiment of the present invention is to groove 30 and pressure sensing cells
40 corresponding relation is defined：Pressure sensing cells 40 have orthographic projection S1 on protection board 12, with pressure sensing cells
There is 40 corresponding grooves 30 edge adjacent with groove 30 in orthographic projection S2, protection board 12 to have first to prolong on protection board 12
Stretch direction, it is to be understood that the first bearing of trend changes with the change at the edge of protection board 12.With reference to Fig. 1 c, orthographic projection S1
Mutually overlapped on the direction perpendicular to the first bearing of trend with orthographic projection S2, orthographic projection S1 and orthographic projection S2 is perpendicular to first
There is identical overlapping region S3 on the direction of bearing of trend.
Fig. 2 is the cross-sectional view of another display device provided in an embodiment of the present invention, as shown in Fig. 2 groove
30 are arranged on knee wall 20, and groove 30 has one first opening 31 towards display panel 11, and groove 30 here is in " U "
Type, three faces of groove 30 are configured the material closing of knee wall 20, and only the side towards display panel 11 is unclosed, groove 30
Bigger deformation will occur for neighbouring protection board 12 and display panel 11, and then nearby set fluted 30 pressure-sensing list
Bigger deformation will also occur for member 40.It should be noted that the embodiment of the present invention is correspondingly arranged with each pressure sensing cells
It is explained, but is not limited exemplified by one groove, a pressure-sensing can also be set in other embodiments
Unit is correspondingly arranged at least two grooves.
Display device provided in an embodiment of the present invention includes display screen, knee wall and multiple pressure sensing cells, display screen
Protection board including display panel and covering display panel, protection board, which is played, protects display panel from injuries such as extraneous abrasions
Effect, display panel includes viewing area and the non-display area around viewing area, and multiple pressure sensing cells are located at display panel
Set fluted on non-display area, knee wall, groove has the first opening towards display panel, and multiple pressure sensing cells
In at least part it is corresponding with groove, each pressure sensing cells in the pressure sensing cells corresponding with groove can
With corresponding with one or more grooves.Pressure sensing cells are corresponding with groove to refer to pressure sensing cells in protection board
Upper have an orthographic projection S1, groove corresponding with pressure sensing cells have on protection board in orthographic projection S2, protection board with groove
Adjacent edge has the first bearing of trend, and orthographic projection S1 and orthographic projection S2 is mutual on the direction perpendicular to the first bearing of trend
It is overlapping.Display device provided in an embodiment of the present invention, by setting the groove corresponding with pressure sensing cells, to display panel
When applying pressure, the protection board and the deformation quantity of display panel added, and then the deformation quantity of pressure sensing cells is added, from
And improve the detectivity of pressure sensing cells.
Alternatively, with reference to Fig. 1 b, on the direction perpendicular to the place plane of protection board 12, groove 30 is opened in the presence of one second
Mouthfuls 32 towards protection board 12.It is understood that the groove 30 with the first opening 31 and the second opening 32 is recessed relative to " U " type
For groove 30, it is easier to increase the deformation quantity of protection board 12 and display panel 11 when by ambient pressure, so that feeling of stress
Survey unit 40 and occur bigger deformation.
Alternatively, with reference to Fig. 1 b, knee wall 20 includes the first supporter 21 and the second supporter 22, the first supporter 21
Between the second supporter 22 and display panel 11, the first supporter 21 is used to support protection board 12, groove 30 in rim area 122
On the first supporter 21.
Specifically, with reference to Fig. 1 b, knee wall 20 includes the first supporter 21 and the second supporter 22, the He of the first supporter 21
Second supporter 22 is integrally formed, and fluted 30 are set on the first supporter 21, therefore can use the first supporter 21
Support is provided for supporting plate 12, to increase supporting plate 12 by shape during ambient pressure using the groove 30 on the first supporter 21
Variable, because usual display panel 11 and protection board 12 are solidified as a whole, such as attaches to protection board by way of attaching aobvious
Show on panel 11, therefore when larger deformation occurs for supporting plate 12, larger deformation can also occur therewith for display panel 11, then
Larger deformation can equally occur for the pressure sensing cells 40 positioned at display panel 11.
Alternatively, with reference to Fig. 1 b, on the direction perpendicular to the place plane of protection board 12, the height of the first supporter 21 is small
In the height of the second supporter 22.
Specifically, with reference to Fig. 1 b, knee wall 20 is L-shaped along the cross sectional shape on its bearing of trend, first
The surface of the supporter 22 of support body 21 and second forms step-like, and the height of the second supporter 22 is more than the height of the first supporter 21
Degree, therefore the second supporter 22 is trapped among inner side by protection board 12 and for the first supporter 21 that protection board 12 provides support, and
Knee wall 20 forms the frame like structure for carrying and protecting display panel 11.
Alternatively, with reference to Fig. 1 b, on the direction perpendicular to the place plane of protection board 12, the depth H of groove 30 be less than or
Equal to 0.5mm.Because the thickness ratio of protection board 12 is relatively thin, protection board 12 is contacted with knee wall 20, when by ambient pressure, is
Prevent the protection board 12 from being ruptured under excessive pressure, the depth of groove can be set to be less than or equal to 0.5mm.
Alternatively, with reference to Fig. 1 a and Fig. 1 c, occur to further enhance groove 30 for enhancing pressure sensing cells 40
The influence of deformation, the embodiment of the present invention can also be further limited the corresponding relation of groove 30 and pressure sensing cells 40
It is fixed：On the direction perpendicular to the first bearing of trend, orthographic projection S1 is covered by orthographic projection S2, i.e., orthographic projection S1 is fully located at overlapping
In the S3 of region.
Alternatively, with reference to Fig. 1 a and Fig. 1 c, pressure sensing cells 40 are square pressure sensing cells, square pressure-sensing list
The length of side of member is the first length M, and there is bearing of trend of the groove 30 along knee wall 20 second length L, i.e. groove 30 to prolong along first
Direction is stretched with the second length L, works as L<During M, because the length of groove 30 is too small, it is impossible to effectively increase pressure sensing cells
40 deformation quantities occurred, work as L>During 10*M, the length of groove 30 is excessive, causes the mechanical strength of knee wall 20 to reduce, it is impossible to
Enough mechanical supports are provided for protection board 12, therefore M≤L≤10*M can be set.
Alternatively, cross sectional shape of the groove along the bearing of trend of knee wall can be rectangle, semicircle, trapezoidal and half ellipse
One or more in circle, the embodiment of the present invention is not limited this.
Fig. 3 is the overlooking the structure diagram of another display device provided in an embodiment of the present invention, as shown in figure 3, any
Pressure sensing cells 40 are at least corresponded in the presence of a groove 30, i.e. as long as there is the pressure-sensing positioned at non-display area 112
Unit 40, just there is the groove 30 corresponding to the pressure sensing cell 40, comes relative to the situation for being not provided with groove in the prior art
Say, the embodiment of the present invention ensure that all pressure sensing cells when receiving ambient pressure with bigger deformation quantity, because
This improves the detectivity of all pressure sensing cells.Display device is exemplarily set to include four pressure in Fig. 3
Sensing unit, it is to be understood that the embodiment of the present invention is not limited for the quantity and putting position of pressure sensing cells.
Alternatively, with reference to Fig. 3, dotted line frame position is the turning of display device in Fig. 3, therefore also contains display panel
Turning, display panel is provided with pressure sensing cells 40 in its corner.
Specifically, with reference to Fig. 3, display panel is provided with pressure sensing cells 40, and pressure sensing cells in its corner
40 have the groove 30 being correspondingly arranged therewith.Because turning is for side edge, when by ambient pressure, display panel hair
Raw deformation quantity is smaller, therefore when corner is provided with pressure sensing cells 40, it is necessary to set a groove 30 to increase turning
Locate pressure sensing cells 40 by deformation quantity during ambient pressure.When multiple corners of display panel are provided with pressure-sensing
During unit 40, a corresponding groove 30 can be set near the pressure sensing cells 40 at each turning to ensure that it has
Enough sensitivity, and then the pressure detection sensitivity of whole display device is improved on the whole.
Fig. 4 is the cut-away section structural representation of another display device provided in an embodiment of the present invention, as shown in figure 4,
Display panel 11 includes first substrate 113 and the second substrate 114 between first substrate 113 and protection board 12, multiple pressures
Power sensing unit 40 is located at first substrate 113 close to the side of second substrate 114.
Fig. 5 is the cut-away section structural representation of another display device provided in an embodiment of the present invention, as shown in figure 5,
Display panel 11 includes first substrate 113 and the second substrate 114 between first substrate 113 and protection board 12, multiple pressures
Power sensing unit 40 is located at second substrate 114 close to the side of first substrate 113.
Alternatively, with reference to Fig. 4 and Fig. 5, display panel 11 can be liquid crystal display panel or organic electroluminescence display panel.
Specifically, with reference to Fig. 4 and Fig. 5, if display panel 11 is liquid crystal display panel, the first substrate 113 can be set to be
Array base palte, second substrate 114 is color membrane substrates.If display panel 11 is organic electroluminescence display panel, the first base can be set
Plate 113 is array base palte, and second substrate 114 is cover plate.In other words, if the display panel is liquid crystal display panel, the feeling of stress
Surveying unit 40 can be arranged on array base palte, can also be arranged on color membrane substrates.If the display panel is aobvious for organic light emission
Show panel, the pressure sensing cells 40 can be arranged on array base palte, can also be arranged on cover plate.In view of array base palte
On be often provided for driving liquid crystal rotation (correspond to liquid crystal display panel) or luminescent layer is luminous (aobvious corresponding to organic light emission
Show panel) circuit structure, alternatively, pressure sensing cells 40 are arranged on array base palte.The benefit so set is, can be with
Formed while being formed and being used to driving liquid crystal rotates or luminescent layer is luminous circuit structure pressure sensing cells 40 and with pressure
The connected signal wire of power sensing unit 40, can simplify manufacture craft.It can in addition contain be used to drive liquid crystal to rotate or light
Segment signal line in the luminous circuit structure of layer is multiplexed with the signal wire electrically connected with pressure sensing cells 40, with to feeling of stress
The pressure sensitivity detection signal that the transmission biasing voltage signal of unit 40 or transmission are exported from pressure sensing cells 40 is surveyed, and then reaches reduction
The laying region for the signal wire being connected with pressure sensing cells 40, extenuates the problem of non-display area wiring is nervous.
Fig. 6 is the cross-sectional view of another display device provided in an embodiment of the present invention, as shown in fig. 6, display
Device also includes elastomeric material 50, and elastomeric material 50 is located in groove 30, and elastomeric material 50 is contacted with protection board 12.
Specifically, with reference to Fig. 6, among the filling of elastomeric material 50 and groove 30, and elastomeric material 50 is contacted with protection board 12,
Because elastomeric material 50 has larger deformation quantity when by ambient pressure, therefore when protection board 12 is by ambient pressure,
It also has larger deformation quantity near the groove 30 of filling resilient material 50, meanwhile, elastomeric material 50 is filled in support
It is that knee wall 20 enhances mechanical strength in the groove 30 of wall 20, therefore the embodiment of the present invention had both improved the guarantor nearby of groove 30
Backplate 12 in turn ensure that there is knee wall 20 enough mechanical strengths to be carried for protection board 12 by deformation quantity during ambient pressure
For support.
Alternatively, with reference to Fig. 6, elastomeric material 50 includes silica gel or acrylic material.Silica gel is respectively provided with acrylic material
Good elasticity and electrical insulating property, and their physical and chemical stability is good, service life is long.
Fig. 7 is a kind of structural representation of pressure sensing cells provided in an embodiment of the present invention, as shown in fig. 7, feeling of stress
Surveying unit 20 includes first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, first resistor R1 first end with
And the 4th resistance R4 first end electrically connected with the first power input D1, first resistor R1 the second end and second resistance R2
First end electrically connected with the first induced signal measurement end S1, the 4th resistance R4 the second end and 3rd resistor R3 first end
Electrically connected with the second induced signal measurement end S2, second resistance R2 the second end and 3rd resistor R3 the second end and the second electricity
Source input D2 is electrically connected.
Specifically, with reference to Fig. 7, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 constitute Hui Si
Energization bridge, when finger presses display panel, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 can be sent out
Raw deformation, thus causes the voltage output value of Wheatstone bridge to be changed, and can pass through the first power input D1 and the
Two power input D2 are that Wheatstone bridge applies operating voltage, and are believed by the sensings of the first induced signal measurement end S1 and second
Number measurement end S2 detects the voltage output value of Wheatstone bridge, and then is calculated and obtain by the voltage output value of Wheatstone bridge
Pressure value.Alternatively, with reference to Fig. 7, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 by it is snakelike walk
Line is constituted, specifically, by taking first resistor R1 as an example, and first resistor R1 snakelike cabling includes what is extended along the second bearing of trend
Long side and the short side extended along the 3rd bearing of trend, therefore preferably on the second bearing of trend shape can occur for first resistor R1
Become, similarly, 3rd resistor R3 can also be deformed upon on the second bearing of trend, and second resistance R2 and the 4th resistance R4 then can
It is enough preferably to be deformed upon on the 3rd bearing of trend, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4
Resistance value according to self-deformation amount occur change accordingly, therefore, it can by pressure sensing cells second extension
Direction and the difference of the deformation quantity on the 3rd bearing of trend, and it is big come the pressure value for calculating press points to be converted into voltage variety
It is small.By using snakelike Wiring structure, first resistor R1, second resistance R2,3rd resistor R3 and the 4th on the one hand can be ensured
While resistance R4 has larger benchmark resistance, the size of resistance is reduced, resistance is distributed in less region, eliminated
The influence of temperature difference；On the other hand the contact area of resistance and the substrate contacted can be increased, allow resistance more smart
Really sense the strain of substrate, improve pressure-sensing precision.Here can be array base palte, color film base with the substrate of Ohmic contact
Plate or cover plate.
Fig. 8 a are the structural representation of another pressure sensing cells provided in an embodiment of the present invention.Referring to Fig. 8 a, the pressure
Power sensing unit is in quadrangle, is made up of semi-conducting material, including first be oppositely arranged is at 131 and second 132, Yi Jixiang
To the 3rd of setting at 133 and the 4th 134；The first power supply signal that pressure sensing cells include positioned at the first side 131 is inputted
The Vin1 and second source signal input part Vin2 positioned at the second side 132 is held, for pressure sensing cells input offset voltage
Signal；Pressure sensing cells also include be located at the 3rd while 133 the first induced signal measurement end Vout1 and positioned at the 4th while 134
The second induced signal measurement end Vout2, for from pressure sensing cells output pressure sensitivity detection signal.
Fig. 8 b are the equivalent circuit diagram of pressure sensing cells shown in Fig. 8 a.Referring to Fig. 8 a and Fig. 8 b, the pressure-sensing list
Member can be equivalent to a Wheatstone bridge, and the Wheatstone bridge includes four equivalent resistances, respectively equivalent resistance Ra, equivalent
Resistance Rb, equivalent resistance Rc and equivalent resistance Rd, wherein second source signal input part Vin2 and the first induced signal measurement end
Region between Vout1 for equivalent resistance Ra, second source signal input part Vin2 and the second induced signal measurement end Vout2 it
Between region be area between equivalent resistance Rb, the first power supply signal input Vin1 and the first induced signal measurement end Vout1
Domain be region between equivalent resistance Rd, the first power supply signal input Vin1 and the second induced signal measurement end Vout2 for etc.
Imitate resistance Rc.When to the first power supply signal input Vin1 and second source signal input part Vin2 input offset voltage signals
When, each branch road has electric current to pass through in Wheatstone bridge.When pressing display panel, pressure sensing cells are because by from display surface
On plate at corresponding position shearing force effect, its internal equivalent resistance Ra, equivalent resistance Rb, equivalent resistance Rc and equivalent electric
The impedance of at least one changes in resistance Rd, so that the first induced signal measurement end Vout1 of pressure sensing cells
The first sensing of pressure sensing cells is believed when the pressure sensitivity detection signal exported with the second induced signal measurement end Vout2 is with without pressing
The pressure sensitivity detection signal of number measurement end Vout1 and the second induced signal measurement end Vout2 outputs is different, accordingly, it may be determined that touch
The size of governor pressure.
Alternatively, the shape of pressure sensing cells can be square.The benefit so set be advantageously allow it is equivalent
Resistance Ra, equivalent resistance Rb, equivalent resistance Rc are identical with equivalent resistance Rd resistance, so, in the case of without pressing, the first sense
Current potential between induction signal measurement end Vout1 and the second induced signal measurement end Vout2 is equal, the first induced signal measurement end
The pressure sensitivity detection signal of Vout1 and the second induced signal measurement end Vout2 outputs is 0, the so favourable calculating for simplifying pressure value
Process, and improve the sensitivity of pressure detecting.
Display device in the embodiment of the present invention can be mobile phone, tablet personal computer and intelligent wearable device etc..
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change,
Readjust, be combined with each other and substitute without departing from protection scope of the present invention.Therefore, although by above example to this
Invention is described in further detail, but the present invention is not limited only to above example, is not departing from present inventive concept
In the case of, other more equivalent embodiments can also be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (16)
1. a kind of display device, it is characterised in that including：
Display screen, the display screen includes display panel and protection board, and the protection board covers the display panel；
The display panel includes viewing area and the non-display area around the viewing area；
The protection board includes display panel conformable region and the rim area around the display panel conformable region, wherein, it is described aobvious
Show region of the panel attachment area corresponding to orthographic projection of the display panel on the protection board；
Knee wall, the knee wall is used to provide support in the rim area for the protection board；
Multiple grooves, the groove is located on the knee wall, and the groove has one first opening towards the display
Panel；
Multiple pressure sensing cells, the multiple pressure sensing cells are located at the non-display area, at least there is part described many
Individual pressure sensing cells, wherein, at least there is a groove for each pressure sensing cells in the part
Correspond；
The pressure sensing cells have orthographic projection S1 on the protection board, corresponding with the pressure sensing cells described recessed
Groove on the protection board there is edge adjacent with the groove in orthographic projection S2, the protection board to have the first extension side
To the orthographic projection S1 and orthographic projection S2 is mutually overlapped on the direction perpendicular to first bearing of trend.
2. display device according to claim 1, it is characterised in that in the direction perpendicular to plane where the protection board
On, there is one second opening towards the protection board in the groove.
3. display device according to claim 1, it is characterised in that the knee wall includes the first supporter and second
Support body, first supporter is located between second supporter and the display panel, and first supporter is used for
The rim area supports the protection board, and the groove is located on first supporter.
4. display device according to claim 3, it is characterised in that in the direction perpendicular to plane where the protection board
On, the height of first supporter is less than the height of second supporter.
5. display device according to claim 1, it is characterised in that any pressure sensing cells at least have one
The groove is corresponded.
6. display device according to claim 1, it is characterised in that the display panel is provided with described in its corner
Pressure sensing cells.
7. display device according to claim 1, it is characterised in that the display panel is liquid crystal display panel or organic
Light emitting display panel.
8. display device according to claim 1, it is characterised in that the display panel includes first substrate and positioned at institute
State the second substrate between first substrate and the protection board；
The multiple pressure sensing cells are located at the first substrate close to the side of the second substrate.
9. display device according to claim 1, it is characterised in that the display panel includes first substrate and positioned at institute
State the second substrate between first substrate and the protection board；
The multiple pressure sensing cells are located at the second substrate close to the side of the first substrate.
10. display device according to claim 1, it is characterised in that in the side perpendicular to plane where the protection board
Upwards, the depth of the groove is less than or equal to 0.5mm.
11. display device according to claim 1, it is characterised in that in the direction perpendicular to first bearing of trend
On, the orthographic projection S1 is covered by the orthographic projection S2.
12. display device according to claim 11, it is characterised in that the pressure sensing cells are square pressure-sensing
Unit, the length of side of the square pressure sensing cells is the first length M, and bearing of trend of the groove along the knee wall has
Second length L, wherein, M≤L≤10*M.
13. display device according to claim 1, it is characterised in that extension of the multiple groove along the knee wall
The cross sectional shape in direction is the one or more in rectangle, semicircle, trapezoidal and half elliptic.
14. display device according to claim 2, it is characterised in that the display device also includes elastomeric material, described
Elastomeric material is located in the groove, and the elastomeric material is contacted with the protection board.
15. display device according to claim 14, it is characterised in that the elastomeric material includes silica gel or acrylic material
Material.
16. display device according to claim 1, it is characterised in that the pressure sensing cells include first resistor, the
Two resistance, 3rd resistor and the 4th resistance；
The first end of the first resistor and the first end of the 4th resistance are electrically connected with the input of the first power supply, described
Second end of first resistor and the first end of the second resistance are electrically connected with the first induced signal measurement end, the 4th electricity
Second end of resistance and the first end of the 3rd resistor are electrically connected with the second induced signal measurement end, and the of the second resistance
Two ends and the second end of the 3rd resistor are electrically connected with second source input.
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| CN201710522420.XA CN107315503B (en) | 2017-06-30 | 2017-06-30 | Display device |
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| CN201710522420.XA CN107315503B (en) | 2017-06-30 | 2017-06-30 | Display device |
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| CN107315503B CN107315503B (en) | 2020-02-07 |
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| CN107315503B (en) | 2020-02-07 |
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