CN108766327A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN108766327A CN108766327A CN201810454761.2A CN201810454761A CN108766327A CN 108766327 A CN108766327 A CN 108766327A CN 201810454761 A CN201810454761 A CN 201810454761A CN 108766327 A CN108766327 A CN 108766327A
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- dummy pixel
- illusory
- display
- display panel
- pressure sensitive
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
A kind of display panel of present invention offer and display device, are related to display technology field, to reduce the difficulty of pressure detecting.The viewing area of display panel is equipped with a plurality of grid line and multiple data lines, and grid line and data line intersection limit multiple display pixels and multiple dummy pixels；Multiple display pixels are arranged in viewing area in matrix form, and dummy pixel is located at display pixel close to the side of non-display area；Each dummy pixel includes dummy pixel electrode, illusory public electrode and illusory thin film transistor (TFT), the projection of dummy pixel electrode and illusory the public electrode plane where display panel is overlapping, the control pole of illusory thin film transistor (TFT) is connected with grid line, first pole of illusory thin film transistor (TFT) is connected with data line, and the second pole of illusory thin film transistor (TFT) is connected with dummy pixel electrode.Pressure sensitive unit is equipped in non-display area, the first output end of pressure sensitive unit is connected with dummy pixel electrode.Above-mentioned display panel shows for realizing picture.
Description
【Technical field】
The present invention relates to display technology field more particularly to a kind of display panel and display devices.
【Background technology】
With the development of touch-control display technology, in order to preferably meet user demand, in addition to traditional can detect touch-control
The touch technology of position has also appeared the pressure touch technology that can detect touch-control pressure size.Pressure touch technology usually needs
Pressure sensitive unit is set in display panel.When display panel is under pressure, pressure sensitive unit will output voltage letter
Number, by the detection to voltage signal to obtain pressure size when user's touch display panel.But due to current driving
It is not configured to read the port of voltage signal in chip IC, the difficulty of pressure detecting is caused to increase.
【Invention content】
In view of this, a kind of display panel of present invention offer and display device, to reduce the difficulty of pressure detecting.
On the one hand, the present invention provides a kind of display panel, the display panel includes viewing area and non-display area, described
Viewing area is equipped with a plurality of grid line and multiple data lines, and the grid line and data line intersection limit multiple display pixels and more
A dummy pixel；Wherein, multiple display pixels are arranged in the viewing area in matrix form, and the dummy pixel is located at institute
Display pixel is stated close to the side of the non-display area；
Each dummy pixel includes dummy pixel electrode, illusory public electrode and illusory thin film transistor (TFT), the void
If pixel and the illusory public electrode are overlapping in the projection of plane where the display panel；The illusory thin film transistor (TFT)
Control pole is connected with the grid line, and the first pole of the illusory thin film transistor (TFT) is connected with the data line, the illusory film
Second pole of transistor is connected with the dummy pixel electrode；
Pressure sensitive unit is equipped in the non-display area, the pressure sensitive unit includes that the first output end and second are defeated
Outlet, first output end are connected with the dummy pixel electrode.
On the other hand, the present invention provides a kind of display device, the display device includes above-mentioned display panel.
The present invention, in this way can be by pressure by the way that the first output end of pressure sensitive unit is connected with dummy pixel electrode
The voltage signal of sensing unit output is stored in the picture being made of dummy pixel electrode and illusory public electrode in the form of capacitance
In plain capacitance, then, by the way that the capacitance in pixel capacitance will be stored in via data line transfer to driving chip, you can realize by
Pressure detecting is realized in the reading for the voltage signal that driving chip exports pressure sensitive unit.
【Description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the display panel that the embodiment of the present invention is provided；
Fig. 2 is a kind of connection relationship diagram of dummy pixel and pressure sensitive unit in Fig. 1；
Fig. 3 is the equivalent circuit diagram of Fig. 2；
Fig. 4 is another connection relationship diagram of dummy pixel and pressure sensitive unit in Fig. 1；
Fig. 5 is the equivalent circuit diagram of Fig. 4；
Fig. 6 is a kind of schematic cross-sections of the Fig. 1 along AA '；
Fig. 7 is another schematic cross-sections of the Fig. 1 along AA '；
Fig. 8 is the structural schematic diagram one of the pressure sensitive unit in the display panel that the embodiment of the present invention is provided；
Fig. 9 is the structural schematic diagram two of the pressure sensitive unit in the display panel that the embodiment of the present invention is provided；
Figure 10 is the structural schematic diagram for the display device that the embodiment of the present invention is provided.
【Specific implementation mode】
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention below in conjunction with the accompanying drawings
It states.
It will be appreciated that the term used in embodiments of the present invention is the purpose only merely for description specific embodiment, and
It is not intended to be limiting the present invention.The "an" of used singulative, " described " and "the" are also intended in embodiments of the present invention
Including most forms, unless context clearly shows that other meanings.
It will be appreciated that though in embodiments of the present invention output end, but these may be described using term first, second
Output end should not necessarily be limited by these terms.These terms are only used for output end being distinguished from each other out.For example, of the invention real not departing from
In the case of applying a range, the first output end can also be referred to as second output terminal, and similarly, second output terminal can also be claimed
For the first output end.
A kind of display panel is present embodiments provided, the display panel provided as shown in FIG. 1, FIG. 1 is the present embodiment
Structural schematic diagram, the display panel include viewing area 1 and non-display area 2, and viewing area 1 is equipped with a plurality of grid line G and multiple data lines
D, grid line G and data line D intersections limit multiple display pixels 11 and multiple dummy pixels 12, wherein multiple display pixels 11
It arranges in matrix form in viewing area 1, dummy pixel 12 is located at display pixel 11 close to the side of non-display area 2.
As shown in Fig. 2, Fig. 2 is a kind of connection relationship diagram of dummy pixel and pressure sensitive unit in Fig. 1, wherein
Each dummy pixel 12 includes dummy pixel electrode 121, illusory public electrode 122 and illusory thin film transistor (TFT) 123, dummy pixel
The projection of electrode 121 and illusory public electrode 122 plane where display panel is overlapping；The control of illusory thin film transistor (TFT) 123
Pole is connected with grid line G, and the first pole of illusory thin film transistor (TFT) 123 is connected with data line D, and the second of illusory thin film transistor (TFT) 123
Pole is connected with dummy pixel electrode 121.
With reference to figure 1 and Fig. 2, pressure sensitive unit 3 is equipped in above-mentioned non-display area 2, pressure sensitive unit 3 includes first defeated
Outlet 31 and second output terminal 32, the first output end 31 are connected with dummy pixel electrode 121.
It should be noted that normal display of the above-mentioned display pixel 11 for the picture in display panel, and dummy pixel
12 do not shine in display panel.Such setting is because when making display panel, it usually needs makes array base respectively
Plate and color membrane substrates, then by array substrate and color membrane substrates to box to form display panel.And usually in the system of array substrate
During work, since equipment or other process conditions are poor in the incipient stage of manufacturing process and the homogeneity of ending phase,
The homogeneity in the intermediate stage of manufacturing process is preferable.Therefore, in order to improve the yield of each display pixel in viewing area, it will usually
So that the viewing area in array substrate is not shone close to the dummy pixel of the position of non-display area, even if start in this way in processing procedure or
At the end of, the yield for these dummy pixels produced due to the unstability of technique is not high also can't be to final display surface
The display effect of plate impacts.Based on this, it will usually the driving chip for receiving the data line D being connected with dummy pixel 12
The data voltage that IC is provided is set as zero, and the position setting black matrix of dummy pixel 12 is corresponded in color membrane substrates.
Based on above structure and connection type, as depicted in figs. 1 and 2, when display panel is under pressure, pressure sensing
3 output voltage signal of unit, which is transmitted to dummy pixel electrode 121 by the first output end 31, due to illusory picture
Plain electrode 121 and the projection of the plane where display panel of illusory public electrode 122 are overlapping, and therefore, the two can form pixel
Capacitance Cst, the composition pixel capacitance of dummy pixel electrode 121 CstA pole plate, illusory public electrode 122 constitutes pixel capacitance Cst
Another pole plate.As shown in figure 3, Fig. 3 is the equivalent circuit diagram of Fig. 2.C thereinlcTo be located at dummy pixel electrode 121 and void
If the equivalent capacity of the liquid crystal (not shown) between public electrode 122.In this way, when pressure sensitive unit 3 believes the voltage of output
After number being transmitted to dummy pixel electrode 121, which just can be stored in pixel capacitance C in the form of capacitancestIn.Specifically
, since dummy pixel electrode 121 is extremely connected with the second of illusory thin film transistor (TFT) 123, the first of illusory thin film transistor (TFT) 123
Pole is connected with data line D, therefore, pixel capacitance C is stored in what the voltage signal was stablized in the form of a chargestTwo pole plates
On to form capacitance after, the capacitance of stable storage can be transmitted to driving core via illusory thin film transistor (TFT) 123 and data line D
Piece, you can realize the reading of the voltage signal exported to pressure sensitive unit 3 by driving chip.That is, the present embodiment is logical
Cross pixel capacitance C in dummy pixel 12stSetting the voltage that pressure sensitive unit 3 exports can be converted to capacitance, from
And driving chip IC is set to pass through the reading to capacitance to realize pressure detecting.
Also, the present embodiment is stored in the form of capacitance by void by the voltage signal for exporting pressure sensitive unit 3
If the pixel capacitance C that pixel electrode 121 and illusory public electrode 122 are constitutedstIn, wait for that above-mentioned voltage signal is steadily stored in
Pixel capacitance CstIn after, you can using existing illusory thin film transistor (TFT) 123 in the display panel and data line D by pixel capacitance
CstThe capacitive transmission of storage is to driving chip IC, without connection pressure sensitive unit 3 and driving chip IC is still further arranged
Cabling allows border width to narrow to reduce the quantity of cabling, is conducive to the narrow frame design of display panel.
In addition, as shown in Figure 1, non-display area 2 may include that the first non-display area 21 and second for being located at 1 both sides of viewing area is non-
Viewing area 22, in the row direction, the first non-display area 21, viewing area 1 and the second non-display area 22 are arranged in order.Usually,
It is placed with close to the side of the second non-display area 22 close to the side of the first non-display area 21 and viewing area 1 in viewing area 1
One row dummy pixel 12.Further, in order to increase the induction range of pressure sensitive unit 3, induction precision, the present embodiment are improved
Multiple pressure sensitive units 3 can be respectively set in the first non-display area 21 and the second non-display area 22.Wherein, first is non-aobvious
Show the connection relation and the second non-display area between the pressure sensitive unit 3 being arranged in area 21 and the dummy pixel 12 closed on
The pressure sensitive unit 3 and the connection relation between the dummy pixel 12 closed on being arranged in 22 are identical as above-mentioned connection relation, this
Place repeats no more.
When the side of display panel includes multiple pressure sensitive units 3, the first output of this multiple pressure sensitive unit 3
End 31 is connected with each dummy pixel electrode 121 of the dummy pixel of same row 12 respectively, in this way can pass this multiple pressure
The signal that sense unit 3 exports, via same data line D, is transferred to driving chip IC by each dummy pixel electrode 121, from
And it avoids the need that when that an output cabling is respectively set to each pressure sensitive unit 3 occurs and occupies caused by larger space
The wide problem of frame, i.e. the present embodiment only can will be positioned at multiple pressure of display panel side by a data line D
The voltage signal that sensing unit 3 exports is transmitted to driving chip, takes full advantage of the space where dummy pixel 12, reduces company
The occupied space of cabling for connecing pressure sensitive unit 3 and driving chip IC, further reduces border width, can be better
Realize the narrow frame design of display panel.
In addition to this, for multiple pressure of the first non-display area 21 or the second non-display area 22 positioned at the display panel
For sensing unit 3, as noted previously, as the present embodiment by the first output end 31 of this multiple pressure sensitive unit 3 with it is same
Each dummy pixel electrode 121 of row dummy pixel 12 is connected, and the signal that this multiple pressure sensitive unit 3 exports is passed through each
A dummy pixel electrode 121 is transferred to driving chip IC via same data line D, in this way, can also make to be located at the display surface
First non-display area 21 of plate or multiple pressure sensitive units 3 of the second non-display area 22 are connected to drive by a data line D
The a port of dynamic chip IC, so as to avoid being that each pressure sensitive unit 3 is respectively provided with a port on driving chip IC,
Greatly reduce the port number on driving chip IC.
On this basis, it to realize and utilize pixel capacitance CstStore the voltage signal of pressure sensitive unit output, Ke Yiyou
Mode is implemented as follows：
As shown in Figures 2 and 3, the first output end 31 of pressure sensitive unit 3 and second output terminal 32 respectively with it is same
The dummy pixel electrode 121 of dummy pixel 12 is connected with illusory public electrode 122, i.e., shown in Fig. 3, the electrical connection of the first output end 31
Dummy pixel electrode 121, second output terminal 32 are electrically connected the illusory public electrode 122 of same dummy pixel 12.In the display surface
When plate is worked, the first voltage value of output is transmitted to dummy pixel electrode 121, second output terminal 32 by the first output end 31
The second voltage value of output is transmitted to illusory public electrode 122.
When display panel is under pressure, the first voltage value and second of the first output end 31 and the output of second output terminal 32
Voltage value is variant, that is to say, that there are potential difference between the signal that the first output end 31 and second output terminal 32 export, because
This, can be equivalent to a power supply, because of the first output end 31 and second output terminal by the first output end 31 and second output terminal 32
32 are connected with the dummy pixel electrode 121 of the same dummy pixel 12 and illusory public electrode 122 respectively, therefore, are equivalent to electricity
Source is to the pixel capacitance C that is made of dummy pixel electrode 121 and illusory public electrode 122stIt charges, in pixel capacitance Cst
Charging process in, the positive and negative charge in power supply can be moved to pixel capacitance C under the action of potential differencestPositive plate and negative
Pole plate, in the moving process of charge, pixel capacitance CstThe charge of two pole plates storage is continuously increased, until pixel capacitance Cst
Charge stops movement when voltage between two-plate is equal to supply voltage, reaches saturation state.After waiting for charge buildup, pixel electricity
Hold CstCapacitance also reach stable.Then, the capacitance of stable storage can be transmitted to driving chip IC via data line D, with
It realizes the reading by the driving chip IC voltage signals exported to pressure sensitive unit 3, and then realizes pressure detecting.
When display panel is not affected by pressure, the first voltage value that the first output end 31 and second output terminal 32 export and the
Two voltage values are equal, that is to say, that voltage difference is not present between the first output end 31 and the signal of the output of second output terminal 32, because
This, is equivalent to power supply not to the pixel capacitance C being made of dummy pixel electrode 121 and illusory public electrode 122 at this timestCharging,
Pixel capacitance CstThe quantity of electric charge of upper storage is 0, and it is 0 to be transmitted to the capacitance in driving chip IC also by data line D, final
To pressure detection value also mutually should be 0.
Specifically, as shown in Fig. 2, the first output end 31 of pressure sensitive unit 3 passes through switch element 4 and dummy pixel 12
Dummy pixel electrode 121 be connected.In this way when the display panel is under pressure, the first output end 31 generates the first voltage value,
Second output terminal 32 generates second voltage value, and when switch element 4 is connected, the first voltage value and second voltage value are with the shape of charge
Formula is stored in the pixel capacitance C being made of dummy pixel electrode 121 and illusory public electrode 122stIn.It, will after capacitance stabilization
Switch element 4 ends, to avoid pixel capacitance CstThe charge of upper storage is moved backward again to the side of pressure sensitive unit 3, is made
Pixel capacitance CstThe charge of upper storage can be all by illusory thin film transistor (TFT) 123 and data line D one-way flows to driving core
Piece IC, to improve the accuracy of pressure detecting.
Specifically, the control terminal of switch element 4 is connected with switch control signal line (not shown), with by switching control letter
The on or off of number line control switch element 4.The first end of switch element 4 and the first output end 31 of pressure sensitive unit 3
It is connected, the second end of switch element 4 is connected with the dummy pixel electrode 121 of dummy pixel 12.Illustratively, above-mentioned illusory film
Transistor 123 and 4 timesharing of switch element conducting.It is connected in this way when by switch control signal line control switch element 4, passes through grid
Line G, which controls illusory thin film transistor (TFT) 123, to be ended, and when display panel is under pressure, the first output end 31 and second output terminal 32 are defeated
The voltage signal gone out is to the pixel capacitance C that is made of dummy pixel electrode 121 and illusory public electrode 122stIt charges.When logical
The cut-off of switch control signal line control switch element 4 is crossed, when controlling the illusory conducting of thin film transistor (TFT) 123 by grid line G, pixel electricity
Hold CstThe capacitance of middle storage is transmitted to driving chip IC via data line D, to realize by driving chip IC to pressure sensitive unit 3
The reading of the voltage signal of output, and then realize pressure detecting.Illustratively, above-mentioned switch control signal line control switch element
The time of 4 conductings can be according to pixel capacitance CstCharge effects depending on, the present embodiment does not limit this.
As shown in Figure 4 and Figure 5, Fig. 4 is that dummy pixel and another connection relation of pressure sensitive unit are illustrated in Fig. 1
Figure, Fig. 5 are the equivalent circuit diagram of Fig. 4.Wherein, the void of the first output end 31 and m-th of dummy pixel 12 of pressure sensitive unit 3
If pixel electrode 121 is connected, the dummy pixel electrode of the second output terminal 32 of pressure sensitive unit 3 and n-th of dummy pixel 12
121 are connected, wherein m ≠ n.That is, two output ends of the same pressure sensitive unit 3 are connected to different void respectively
If pixel 12.
When the display panel is worked, the first output end 31 by the first voltage value of output be transmitted to m-th it is illusory
The second voltage value of output is transmitted to n-th dummy pixel 12 by the dummy pixel electrode 121 of pixel 12, second output terminal 32
Dummy pixel electrode, the illusory public electrode 122 of each dummy pixel 12 can be connected to common signal end at this time or other are solid
Determine signal end.Therefore, in the illusory common electrical of the illusory public electrode 122 and n-th of dummy pixel 12 of m-th of dummy pixel 12
In the case that the potential of pole 122 is equal, it is assumed that after charging complete, by 121 He of dummy pixel electrode of m-th of dummy pixel 12
The pixel capacitance C that illusory public electrode 122 is constitutedstCapacitance be Cm, by the dummy pixel electrode of n-th of dummy pixel 12
121 and illusory public electrode 122 constitute pixel capacitance CstCapacitance be Cn, when display panel is under pressure, due to
The first voltage value and second voltage value that one output end 31 and second output terminal 32 export can be variant, therefore, Cm≠Cn,, accordingly
, as the pixel capacitance C being made of m-th of dummy pixel 12stThe capacitance of middle storage is transmitted to driving chip via data line D
IC, and the pixel capacitance C that is made of n-th of dummy pixel 12stThe capacitance of middle storage is transmitted to driving chip via data line D
After IC, capacitance twice is read by driving chip IC and pressure detecting can be realized as difference.When display panel is not affected by pressure
When power, the first output end 31 is equal with the first voltage value and second voltage value that second output terminal 32 exports, therefore, C at this timem=
Cn, correspondingly, as the pixel capacitance C being made of m-th of dummy pixel 12stThe capacitance of middle storage is transmitted to drive via data line D
Chip IC is moved, and the pixel capacitance C being made of n-th of dummy pixel 12stThe capacitance of middle storage is transmitted to drive via data line D
After dynamic chip IC, it is 0 to read capacitance twice by driving chip IC and can be obtained pressure detection value as difference.
Specifically, in the course of work of display panel, each row grid line G turn in order, with m row grid lines Gm prior to n-th
For row grid line Gn conducting, when m row grid lines are connected, the pixel capacitance C that is made of m-th of dummy pixel 12stMiddle storage
Capacitance is transmitted to driving chip IC via data line D, then, the conducting of line n grid line, the picture being made of n-th of dummy pixel 12
Plain capacitance CstThe capacitance of middle storage is transmitted to driving chip IC via data line D, and then driving chip IC reads capacitance twice
It is worth and makees difference to obtain pressure detection value.
Optionally, the present embodiment is by making m=n+1 or n=m+1, that is to say, that makes and the same pressure sensitive unit 3
Two connected dummy pixels 12 are located at two adjacent rows, with shorten each pressure sensitive unit 3 output the first voltage value and
Second voltage value is transferred to the time difference of driving chip IC, so that driving chip IC is received in a relatively short period of time same
The first pressure value and second pressure value that pressure sensitive unit 3 exports, and then one received by driving chip IC can be reduced
The quantity of the other signals interted between the first pressure value exported of a pressure sensitive unit 3 and second pressure value, to
Improve the accuracy of pressure detecting.
Specifically, as shown in Figure 4 and Figure 5, the first output end 31 of pressure sensitive unit 3 by first switching element 41 with
The dummy pixel electrode 121 of m-th of dummy pixel 12 is connected, and the second output terminal 32 of pressure sensitive unit 3 passes through second switch
Element 42 is connected with the dummy pixel electrode 121 of n-th of dummy pixel 12.In this way when the display panel is under pressure, first
Output end 31 generates the first voltage value, and second output terminal 32 generates second voltage value, when first switching element 41 is connected, first
Voltage value is transmitted to the dummy pixel electrode 121 of m-th of dummy pixel 12 by first switching element 41, due to illusory common electrical
Pole 122 is connected with common signal end or other fixed voltage signal ends, therefore, at this point, the first voltage value connects with public electrode 122
The voltage signal connect is stored in dummy pixel electrode 121 and illusory common electrical by m-th dummy pixel 12 in the form of a charge
The pixel capacitance C that pole 122 is constitutedstIn.After capacitance stabilization, first switching element 41 is set to end, to avoid pixel capacitance CstOn
The charge of storage is moved backward again to the side of pressure sensitive unit 3, makes pixel capacitance CstThe charge of upper storage can pass through void
If thin film transistor (TFT) 123 and data line D one-way flows are to driving chip IC；As a same reason, when second switch element 42 is connected,
Second voltage value is transmitted to the dummy pixel electrode 121 of n-th of dummy pixel 12 by second switch element 42, due to illusory public affairs
Common electrode 122 is connected with common signal end or other fixed voltage signal ends, therefore, at this point, second voltage value and public electrode
The voltage signals of 122 connections are stored in dummy pixel electrode 121 and illusory public affairs by n-th dummy pixel 12 in the form of a charge
The pixel capacitance C that common electrode 122 is constitutedstIn.After capacitance stabilization, second switch element 42 is ended, to avoid pixel capacitance
CstThe charge of upper storage is moved backward again to the side of pressure sensitive unit 3, makes pixel capacitance CstThe charge of upper storage can lead to
Illusory thin film transistor (TFT) 123 and data line D one-way flows are crossed to driving chip IC, to improve the accuracy of pressure detecting.
Illustratively, the control terminal of above-mentioned first switching element 41 is connected with first switch control signal wire (not shown),
The first end of first switching element 41 is connected with the first output end 31 of pressure sensitive unit 3, and the second of first switching element 41
End is connected with the dummy pixel electrode of m-th of dummy pixel 12；The control terminal of second switch element 42 is believed with second switch control
Number line is (not shown) to be connected, and the first end of second switch element 42 is connected with the second output terminal 32 of pressure sensitive unit 3, and second
The second end of switch element 42 is connected with the dummy pixel electrode 121 of n-th of dummy pixel 12, is believed with being controlled by first switch
Number line and second switch control signal wire control the on or off of first switching element 41 and second switch element 42 respectively.Show
Example property, the illusory thin film transistor (TFT) 123 of above-mentioned m-th of dummy pixel 12 and 41 timesharing of first switching element conducting, n-th empty
If the illusory thin film transistor (TFT) 123 of pixel 12 and 42 timesharing of second switch element conducting.Believe in this way when by first switch control
Number line traffic control first switching element 41 is connected, and the illusory thin film transistor (TFT) 123 that m-th of dummy pixel 12 is controlled by grid line Gm is cut
Only, when display panel is under pressure, the first voltage value of the first output end 31 output and the consolidating of receiving of illusory public electrode 122
Constant voltage value is to the pixel capacitance C that is made of the dummy pixel electrode 121 of m rows dummy pixel 12 and illusory public electrode 122st
It charges.End when controlling first switching element 41 by first switch control signal wire, m-th of void is controlled by grid line Gm
If the illusory thin film transistor (TFT) 123 of pixel 12 is connected, pixel capacitance CstThe capacitance of middle storage is transmitted to driving via data line D
Chip IC, to realize the reading by the driving chip IC voltage signals exported to the first output end 31 of pressure sensitive unit 3.When
Second switch element 42 is controlled by second switch control signal wire to be connected, and passes through grid line Gn n-th of dummy pixel 12 of control
Illusory thin film transistor (TFT) 123 ends, when display panel is under pressure, second voltage value and illusory public affairs that second output terminal 32 exports
The fixed voltage value that common electrode 122 receives to by line n dummy pixel 12 dummy pixel electrode 121 and illusory public electrode
The 122 pixel capacitance C constitutedstIt charges.End when controlling second switch element 42 by second switch control signal wire, leads to
When crossing the conducting of illusory thin film transistor (TFT) 123 of grid line Gn n-th of dummy pixel 12 of control, pixel capacitance CstThe capacitance of middle storage passes through
Driving chip IC is transmitted to by data line D, the second output terminal 32 of pressure sensitive unit 3 is exported by driving chip IC with realizing
Voltage signal reading, capacitance twice is then read by driving chip IC and pressure detecting can be realized as difference.Show
Example property, above-mentioned first switch control signal wire and second switch control signal wire control first switching element 41 and second switch
The time that element 42 is connected can be according to pixel capacitance CstCharge effects depending on, the present embodiment does not limit this.
Illustratively, the present embodiment does not limit the turn-on sequence of first switching element 41 and second switch element 42
It is fixed, that is, the control signal of above-mentioned first switch control signal wire and second switch control signal wire can be identical, makes first switch
Element 41 and second switch element 42 can simultaneously turn on or end；Or first switch control signal wire and second switch control
The control signal of signal wire can also be different, such as can first pass through first switch control signal wire control first switching element 41
It is first connected, then controlling second switch element 42 by second switch control signal wire ends；Second switch can also be first passed through
Control signal wire control second switch element 42 is first connected, and then controls first switching element by first switch control signal wire
41 cut-offs, as long as ensureing 123 timesharing of the illusory thin film transistor (TFT) conducting of first switching element 41 and m-th of dummy pixel 12, the
123 timesharing of the illusory thin film transistor (TFT) conducting of two switch elements 42 and n-th of dummy pixel 12.
Illustratively, the illusory public electrode 122 of above-mentioned m-th of dummy pixel 12 and n-th dummy pixel 12 is illusory
Public electrode 122 is connected with common signal end, that is, the present embodiment is by making each illusory public electrode 122 receive identical letter
Number, each illusory public electrode can be made whole face structure when making in this way, to simplify manufacture craft.
Illustratively, as shown in Figure 1, display pixel 11 includes display pixel electrode 111 and display public electrode 112,
In, the overlapping area of display pixel electrode 111 and the display projection of plane where display panel of public electrode 112 is the first face
The overlapping area of product, the projection of plane where display panel of dummy pixel electrode 121 and illusory public electrode 122 is the second face
Product.As shown in fig. 6, Fig. 6 is a kind of schematic cross-sections of the Fig. 1 along AA ', wherein display pixel electrode 111 and display public electrode
Vertical range between 112 is the first distance d1；Vertical range between dummy pixel electrode 121 and illusory public electrode 122
For second distance d2.
Wherein, second area is more than the first area, and/or, second distance d2 is less than the first distance d1.According to parallel-plate electricity
The capacitance calculation formula of container：
Wherein, ε is the dielectric constant of medium, and S is the facing area of two pole plates of capacitor, and k is electrostatic force constant, d
For the vertical range between two pole plates of capacitor, the present embodiment is in the display pixel electrode 111 shown for picture and shows
On the basis of the setting for showing public electrode 112, by increasing the face between dummy pixel electrode 121 and illusory public electrode 122
Area makes dummy pixel 12 alternatively, by reducing the vertical range between dummy pixel electrode 121 and illusory public electrode 122
Setting at least meet one of above-mentioned two condition, with increase by dummy pixel 12 dummy pixel electrode 121 and void
If the pixel capacitance C that public electrode 122 is constitutedstStorable capacitance range, and then allow to detect using the dummy pixel 12
Go out large range of pressure, improves the detection range of pressure.
Alternatively, as shown in fig. 7, Fig. 7 is another schematic cross-sections of the Fig. 1 along AA ', above-mentioned dummy pixel 12 further includes mending
Metal layer 124 is repaid, compensation metal layer 124 and the projection of the plane where display panel of dummy pixel electrode 121 are overlapping, compensation payment
Belong to layer 124 and the projection of the plane where display panel of illusory public electrode 122 is overlapping；Wherein, compensation metal layer 124 with it is public
Signal end is (not shown) to be connected.The present embodiment is by the compensation metal layer 124 that is additionally arranged, equivalent to increase one by compensating
The pixel capacitance that metal layer 124 and dummy pixel electrode 121 are constituted, and it is increased this by compensation metal layer 124 and illusory picture
The pixel capacitance that plain electrode 121 is constituted with the pixel capacitance that is made of illusory public electrode 122 and dummy pixel electrode 121 simultaneously
Connection, it is the sum of the capacitance of the two to make finally formed capacitance, further increases storable capacitance range, can further carry
The detection range of high pressure.Illustratively, which can be arranged with grid line G or data line D same layers, with simplification
Manufacture craft.
It should be noted that in the present embodiment, pressure sensitive unit 3 further includes two signal input parts, carries out pressure inspection
It is defeated via the first of pressure sensitive unit 3 by two signal input parts to 3 input offset voltage of pressure sensitive unit when survey
Outlet 31 and second output terminal 32 export the first voltage value and second pressure value respectively, to realize pressure detecting.
Optionally, above-mentioned pressure sensitive unit 3 can be Wheatstone bridge formula pressure sensor.As shown in figure 8, Fig. 8 is this
A kind of structural schematic diagram for the pressure sensitive unit that inventive embodiments are provided.When pressure sensitive unit 3 is Wheatstone bridge formula
When pressure sensor, first resistor is in series between the first input end IN1 of pressure sensitive unit 3 and the first output end OUT1
R1 is in series with second resistance R2, the second input terminal IN2 and the second output between the first output end OUT1 and the second input terminal IN2
It is in series with 3rd resistor R3 between the OUT2 of end, the 4th resistance R4 is in series between second output terminal OUT2 and first input end IN1.
When display panel does not deform upon, electric bridge is equilibrium state, i.e. the resistance of first resistor R1 and second resistance R2
The ratio between value is equal to the ratio between the resistance value of the 4th resistance R4 and 3rd resistor R3, and the voltage value of the first output end OUT1 is equal to the second output
Hold the voltage value of OUT2.
When applying certain pressure to display panel, when display panel being made to deform upon, first resistor R1, second resistance
R2,3rd resistor R3 and the 4th resistance R4 can be deformed upon, and the resistance value of each resistance is caused to change, and break the balance of electric bridge
State.At this point, the ratio between resistance value of first resistor R1 and second resistance R2 is not equal to the resistance value of the 4th resistance R4 and 3rd resistor R3
The ratio between, the voltage value at the first output end OUT1 is not equal to the voltage value at second output terminal OUT2.Wherein, the first output end
There are correspondence, bases for the pressure value that the difference of the voltage value of OUT1 and the voltage value of second output terminal OUT2 is subject to display panel
In the voltage value of the first output end OUT1, the voltage value and correspondence of second output terminal OUT2, you can pressed accordingly
Force value.
Optionally, pressure sensitive unit 3 or silicon piezoresistance type pressure sensor.As shown in figure 9, Fig. 9 is of the invention real
Apply another structural schematic diagram for the pressure sensitive unit that example is provided.When pressure sensitive unit is silicon piezoresistance type pressure sensor
When, pressure sensitive unit is the quadrilateral structure of full wafer, and pressure sensitive unit includes the first edge being sequentially connected, the second side
Edge, third edge and the 4th edge.The first input end IN1 of pressure sensitive unit is connected with first edge, the first output end
OUT1 is connected with second edge, and the second input terminal IN2 is connected with third edge, and second output terminal OUT2 is connected with the 4th edge.
When applying certain pressure to display panel, when display panel being made to generate deformation, silicon piezoresistance type pressure sensor
Resistance value changes, and corresponding variation occurs for the voltage signal that the first output end OUT1 and second output terminal OUT2 are exported, into
And according to the variation of the first output end OUT1 and the voltage signal of second output terminal OUT2 outputs, detect silicon piezoresistance type pressure sensing
The pressure that device is subject to.
The present embodiment additionally provides a kind of display device, and as shown in Figure 10, it is aobvious that Figure 10 is that the embodiment of the present invention is provided
The structural schematic diagram of showing device, the display device include above-mentioned display panel 100.Wherein, the concrete structure of display panel 100 with
And operation principle is described in detail in the above-described embodiments, details are not described herein again.Certainly, display dress shown in Fig. 10
Set only schematically illustrate, which can be such as mobile phone, tablet computer, laptop, electric paper book or TV
Any electronic equipment with display function such as machine.
Since display device provided in this embodiment includes display panel 100 as described above, it is filled using the display
It sets, after the voltage signal of output is transmitted to dummy pixel electrode 121 by pressure sensitive unit 3, voltage signal is made just can
Pixel capacitance C is stored in the form of capacitancestIn.Then, the capacitance of stable storage can be via 123 He of illusory thin film transistor (TFT)
Data line D is transmitted to driving chip, you can realize the reading of the voltage signal exported to pressure sensitive unit 3 by driving chip,
That is, the present embodiment passes through pixel capacitance C in dummy pixel 12stThe electricity that pressure sensitive unit 3 can be exported of setting
Pressure amount is converted to capacitance, to make driving chip IC pass through the reading to capacitance to realize pressure detecting.
Also, the present embodiment is stored in the form of capacitance by void by the voltage signal for exporting pressure sensitive unit 3
If the pixel capacitance C that pixel electrode 121 and illusory public electrode 122 are constitutedstIn, wait for that above-mentioned voltage signal is steadily stored in
Pixel capacitance CstIn after, you can using existing illusory thin film transistor (TFT) 123 in the display panel and data line D by pixel capacitance
CstThe capacitive transmission of storage is to driving chip IC, without connection pressure sensitive unit 3 and driving chip IC is still further arranged
Cabling, the cabling by using existing data line D in display panel as connection pressure sensitive unit 3 and driving chip IC,
That is, the output line that data line can be multiplexed with to voltage signal is arranged such in the present embodiment, avoid in display panel
The additional cabling of middle setting, allows border width to narrow, is conducive to the narrow frame design of display device.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (18)
1. a kind of display panel, which is characterized in that the display panel includes viewing area and non-display area, and the viewing area is equipped with
A plurality of grid line and multiple data lines, the grid line and data line intersection limit multiple display pixels and multiple illusory pictures
Element；Wherein, multiple display pixels are arranged in the viewing area in matrix form, and the dummy pixel is located at the display picture
Element is close to the side of the non-display area；
Each dummy pixel includes dummy pixel electrode, illusory public electrode and illusory thin film transistor (TFT), the illusory picture
Plain electrode and the illusory public electrode are overlapping in the projection of plane where the display panel；The illusory thin film transistor (TFT)
Control pole is connected with the grid line, and the first pole of the illusory thin film transistor (TFT) is connected with the data line, the illusory film
Second pole of transistor is connected with the dummy pixel electrode；
Pressure sensitive unit is equipped in the non-display area, the pressure sensitive unit includes the first output end and the second output
End, first output end are connected with the dummy pixel electrode.
2. display panel according to claim 1, which is characterized in that the non-display area includes being located at the viewing area two
The first non-display area and the second non-display area of side, in the row direction, first non-display area, the viewing area and described
Two non-display areas are arranged in order；
First non-display area and/or second non-display area are equipped with multiple pressure sensitive units；
The first output end positioned at multiple pressure sensitive units of first non-display area and illusory picture described in same row
The dummy pixel electrode of element is connected；
The first output end positioned at multiple pressure sensitive units of second non-display area and illusory picture described in same row
The dummy pixel electrode of element is connected.
3. display panel according to claim 1, which is characterized in that the first output end of the pressure sensitive unit and institute
State the second output terminal of pressure sensitive unit respectively with the dummy pixel electrode of the same dummy pixel and the void
If public electrode is connected.
4. display panel according to claim 3, which is characterized in that the first output end of the pressure sensitive unit passes through
Switch element is connected with the dummy pixel electrode of the dummy pixel.
5. display panel according to claim 4, which is characterized in that the control terminal of the switch element and switch control letter
Number line is connected, and the first end of the switch element is connected with the first output end of the pressure sensitive unit, the switch element
Second end be connected with the dummy pixel electrode of the dummy pixel.
6. display panel according to claim 4, which is characterized in that the illusory thin film transistor (TFT) and the switch element
Timesharing is connected.
7. display panel according to claim 1, which is characterized in that the first output end of the pressure sensitive unit and
The dummy pixel electrode of m dummy pixels is connected, the second output terminal of the pressure sensitive unit with described in n-th
The dummy pixel electrode of dummy pixel is connected；Wherein, m ≠ n.
8. display panel according to claim 7, which is characterized in that the first output end of the pressure sensitive unit passes through
First switching element is connected with the dummy pixel electrode of m-th of dummy pixel, and the second of the pressure sensitive unit
Output end is connected by second switch element with the dummy pixel electrode of n-th of dummy pixel.
9. display panel according to claim 8, which is characterized in that the control terminal of the first switching element is opened with first
Control signal wire to be closed to be connected, the first end of the first switching element is connected with the first output end of the pressure sensitive unit,
The second end of the first switching element is connected with the dummy pixel electrode of m-th of dummy pixel；
The control terminal of the second switch element is connected with second switch control signal wire, the first end of the second switch element
It is connected with the second output terminal of the pressure sensitive unit, the second end of the second switch element and n-th of illusory picture
The dummy pixel electrode of element is connected.
10. display panel according to claim 8, which is characterized in that the illusory film of m-th of dummy pixel
Transistor and first switching element timesharing conducting, the illusory thin film transistor (TFT) of n-th dummy pixel and described
Second switch element timesharing is connected.
11. display panel according to claim 7, which is characterized in that m-th dummy pixel it is described illusory public
Electrode and the illusory public electrode of n-th of dummy pixel are connected with common signal end.
12. display panel according to claim 7, which is characterized in that m=n+1 or n=m+1.
13. display panel according to claim 1, which is characterized in that the display pixel include display pixel electrode and
Show public electrode；
The display pixel electrode and it is described display public electrode the projection of plane where the display panel overlapping area
For the first area；Vertical range between the display pixel electrode and the display public electrode is the first distance；
The overlapping area of the dummy pixel electrode and the illusory public electrode in the projection of plane where the display panel
For second area；Vertical range between the dummy pixel electrode and the illusory public electrode is second distance；
The second area is more than first area；And/or the second distance is less than first distance.
14. display panel according to claim 1, which is characterized in that the dummy pixel further includes compensation metal layer, institute
It states projection of the compensation metal layer with the dummy pixel electrode in plane where the display panel to overlap, the compensation metal layer
It is overlapping in the projection of plane where the display panel with the illusory public electrode；
The compensation metal layer is connected with the common signal end.
15. display panel according to claim 14, which is characterized in that the compensation metal layer and the grid line are described
Data line same layer is arranged.
16. the display panel according to any one of claim 1~15, which is characterized in that the pressure sensitive unit is
Wheatstone bridge formula pressure sensor；
It is in series with the first voltage dependent resistor between the first input end and the first output end of the Wheatstone bridge formula pressure sensor,
The second voltage dependent resistor, second input terminal and second output are in series between first output end and the second input terminal
It is in series with third voltage dependent resistor between end, the 4th buckling electricity is in series between the second output terminal and the first input end
Resistance.
17. the display panel according to any one of claim 1~15, which is characterized in that the pressure sensitive unit is
Silicon piezoresistance type pressure sensor.
18. a kind of display device, which is characterized in that the display device includes as claim 1~17 any one of them is aobvious
Show panel.
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