CN108445663B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108445663B CN108445663B CN201810201279.8A CN201810201279A CN108445663B CN 108445663 B CN108445663 B CN 108445663B CN 201810201279 A CN201810201279 A CN 201810201279A CN 108445663 B CN108445663 B CN 108445663B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to reduce the attenuation of a power supply signal and effectively improve the difference of the power supply signal in the driving capability of pressure sensing units at different positions. The display panel comprises M pressure sensing unit groups, a first signal line, a second signal line and at least one first connecting signal line; the pressure sensing unit group comprises a first pressure sensing unit and a second pressure sensing unit; the first pressure sensing unit is arranged in the first non-display area, and the second pressure sensing unit is arranged in the second non-display area; the first signal line is arranged in the first non-display area and electrically connected with the first pressure sensing unit; the second signal line is arranged in the second non-display area and electrically connected with the second pressure sensing unit; the first connecting signal line is arranged between the first signal line and the second signal line, and the first connecting signal line is electrically connected with the first signal line and the second signal line. The display panel is used for realizing picture display.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Currently, in order to realize the pressure sensing function of the display panel, a pressure sensor for sensing pressure is generally provided in the display panel. As shown in fig. 1, fig. 1 is a schematic structural diagram of a display panel in the prior art, the display panel includes a display area 1' and non-display areas 2' located at two sides of the display area 1', a plurality of pressure sensors 3' are disposed in the non-display areas 2', and a power supply terminal of each pressure sensor 3' is connected to a power supply line 4 '.
In the prior art, it is common to drive a plurality of pressure sensors 3 'simultaneously in such a way that power signals are transmitted simultaneously on two power lines 4'. However, under the influence of the wiring load, the more the power signal is transmitted, the greater the attenuation degree of the power signal is, which weakens the driving capability of the power signal to the pressure sensors 3 'arranged on the top, and affects the detection of the pressure sensors 3' on the pressure.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel and a display device, so as to reduce the attenuation of a power signal and effectively improve the driving capability difference of the power signal for the pressure sensing units at different positions.
In one aspect, an embodiment of the present invention provides a display panel, where the display panel includes a substrate base plate, where the substrate base plate includes a first non-display area, a display area, and a second non-display area, which are sequentially arranged along a row direction, and multiple gate lines, multiple data lines, multiple touch electrodes, and multiple touch signal lines are arranged in the display area; the grid lines and the data lines are crossed and insulated to define a plurality of sub-pixels, the sub-pixels form N sub-pixel rows, and N is a positive integer greater than 1; the touch control electrodes are arranged in a matrix form, each touch control signal line is electrically connected with one touch control electrode, and the touch control electrodes are reused as common electrodes in a display time period;
the display panel further includes:
the pressure sensing unit groups comprise M pressure sensing unit groups, and each pressure sensing unit group comprises a first pressure sensing unit and a second pressure sensing unit; the first pressure sensing unit is arranged in the first non-display area, the second pressure sensing unit is arranged in the second non-display area, and M is a positive integer greater than 1;
the first signal line is arranged in the first non-display area and is electrically connected with the first input ends of the M first pressure sensing units;
the second signal line is arranged in the second non-display area and is electrically connected with the first input ends of the M second pressure sensing units;
at least one first connection signal line, the first connection signal line is disposed between the first signal line and the second signal line, and the first connection signal line is electrically connected with the first signal line and the second signal line, respectively.
In another aspect, an embodiment of the present invention provides a display device, which includes the above display panel.
One of the above technical solutions has the following beneficial effects:
compared with the prior art, by adopting the technical scheme provided by the embodiment of the invention, based on the connection relation of the first signal line, the second signal line and the first connection signal line, a loop can be formed between the first signal line and the second signal line, and the equivalent wiring resistance of the transmission wiring is reduced, so that the attenuation of the power supply signal caused by the wiring resistance is reduced. When the attenuation of the power signal in the transmission process is reduced, the difference between the voltage value of the power signal received by the pressure sensing unit group at the top and the voltage value of the power signal received by the pressure sensing unit group at the bottom is reduced, so that the driving capability of the power signal to the pressure sensing unit groups at different positions is effectively improved, the detection difference between the pressure sensing unit groups is reduced, and the pressure detection precision is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel in the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is an equivalent circuit diagram of the first signal line and the second signal line when they are independently powered by the prior art;
fig. 4 is an equivalent circuit diagram corresponding to a case where one first connection signal line is connected between the first signal line and the second signal line;
fig. 5 is a schematic structural diagram of a first connection signal line according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a film structure of a first signal line according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating another exemplary structure of a first signal line according to the present invention;
fig. 8 is a schematic structural diagram of a first connection signal line according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating another exemplary structure of a first signal line according to the present invention;
FIG. 10 is a diagram illustrating another exemplary structure of a first signal line;
fig. 11 is a schematic structural diagram of a first connection signal line according to an embodiment of the present invention;
FIG. 12 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 15 is a schematic diagram of a film structure of a first control signal line and/or a second control signal line of a display panel according to an embodiment of the invention;
FIG. 16 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 17 is a schematic structural diagram of a Wheatstone bridge pressure sensor according to an embodiment of the invention;
FIG. 18 is a schematic structural diagram of a silicon piezoresistive pressure sensor provided by an embodiment of the present invention;
fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first and second may be used to describe the connection signal lines in the embodiments of the present invention, the connection signal lines should not be limited to these terms. These terms are only used to distinguish the connection signal lines from each other. For example, the first connection signal line may also be referred to as a second connection signal line, and similarly, the second connection signal line may also be referred to as a first connection signal line without departing from the scope of the embodiments of the present invention.
An embodiment of the present invention provides a display panel, as shown in fig. 2, fig. 2 is a schematic structural diagram of the display panel provided in the embodiment of the present invention, the display panel includes a substrate 1, the substrate 1 includes a first non-display area 2, a display area 3, and a second non-display area 4 sequentially arranged along a row direction, and a plurality of Gate lines Gate, a plurality of Data lines Data, a plurality of touch electrodes 5, and a plurality of touch signal lines TP are disposed in the display area 3. The Gate lines Gate and the Data lines Data are crossed and insulated to define a plurality of sub-pixels 6, the plurality of sub-pixels 6 form N sub-pixel rows 7, and N is a positive integer greater than 1; the touch electrodes 5 are arranged in a matrix form, each touch signal line TP is electrically connected with one touch electrode 5, and the touch electrodes 5 are reused as common electrodes in a display period.
It should be noted that the matrix arrangement of the touch electrodes 5 means that the touch electrodes 5 are arranged in N rows and M columns, where N and M are positive integers greater than 1, respectively. Moreover, for the display panel with touch function, the driving cycle of one frame includes a display time period and a touch time period, in the display time period, the touch electrode 5 is reused as a common electrode, the touch electrode 5 receives a common voltage transmitted by a common signal line (not shown in the figure) connected with the common electrode, and the liquid crystal is turned over under the effect of the voltage difference between the common voltage received by the touch electrode 5 and the pixel voltage received by the pixel electrode, so as to realize the picture display. In the touch time period, the touch electrode 5 transmits a touch signal through the touch signal line TP connected thereto, and then performs touch recognition by detecting a change in the touch signal on the touch electrode 5.
In addition, the display panel further includes M pressure sensing cell groups 8, a first signal line PL1, a second signal line PL2, and at least one first connection signal line CL 1. Wherein each pressure sensing cell group 8 comprises a first pressure sensing cell 9 and a second pressure sensing cell 10; the first pressure sensing unit 9 is arranged in the first non-display area 2, the second pressure sensing unit 10 is arranged in the second non-display area 4, and M is a positive integer greater than 1. A first signal line PL1 is provided in the first non-display region 2, a first signal line PL1 is electrically connected to first input terminals of the M first pressure sensing cells 9, a second signal line PL2 is provided in the second non-display region 4, and a second signal line PL2 is electrically connected to first input terminals of the M second pressure sensing cells 10. The first connection signal line CL1 is provided between the first signal line PL1 and the second signal line PL2, and the first connection signal line CL1 is electrically connected to the first signal line PL1 and the second signal line PL2, respectively.
It is understood that the first signal line PL1 and the second signal line PL2 are further connected to a driving chip (not shown in the figure), respectively, and when it is required to drive the first pressure sensing cell 9 and the second pressure sensing cell 10 to operate, the driving chip outputs a power signal, which is transmitted to the first pressure sensing cell 9 and the second pressure sensing cell 10 via the first signal line PL1 and the second signal line PL 2.
If the routing manner in the prior art is adopted, the first connection signal line CL1 is not connected between the first signal line PL1 and the second signal line PL2, that is, the first signal line PL1 independently transmits the power signal to the first pressure sensing cell 9, and the second signal line PL2 independently transmits the power signal to the second pressure sensing cell 10. Taking the first signal line PL1 as an example, in the process of transmitting the power signal from the bottom to the top of the first signal line PL1, the power signal is affected by the larger line resistance the further the power signal is transmitted, and therefore the attenuation of the power signal is larger. This results in that the driving capability of the power signal to the top first pressure sensing cell 9 is smaller than that of the power signal to the bottom first pressure sensing cell 9, so that the pressure detection of the first pressure sensing cells 9 at different positions is different.
The following describes the track resistance of the transmission track in detail with reference to fig. 3 and fig. 4:
first, assume that the first trace resistance corresponding to the whole first signal line PL1 is R1, the second trace resistance corresponding to the whole second signal line PL2 is R2, and the resistance values of the first trace resistance R1 and the second trace resistance R2 are both R.
As shown in fig. 3, fig. 3 is an equivalent circuit diagram corresponding to the case where the first signal line and the second signal line are independently powered, when the first connection signal line CL1 is not connected between the first signal line PL1 and the second signal line PL2, under the influence of the first trace resistor R1, when the power signal is transmitted to the top of the first signal line PL1, the power signal has a voltage drop of R × I, that is, the power signal received by the first pressure sensing unit 9 located at the top is lower than the power signal provided by the driving chip by a voltage value of R × I. Similarly, when the power signal is transmitted to the top of the second signal line PL2 under the influence of the second trace resistor R2, the voltage drop of the power signal also exists, that is, the power signal received by the second pressure sensing unit 10 at the top is lower than the power signal provided by the driving chip by the voltage value of R × I.
However, the first signal line PL1And a first connection signal line CL1 is provided between the second signal line PL2, and the first connection signal line CL1 is located between the top of the first signal line PL1 and the top of the second signal line PL2, as shown in fig. 4, fig. 4 is an equivalent circuit diagram corresponding to a case where a first connection signal line is connected between the first signal line and the second signal line, a loop is formed between the first signal line PL1 and the second signal line PL2 through the first connection signal line CL1, so that the first trace resistor r1 and the second trace resistor r2 are in a parallel state according to a formula
It can be seen that the equivalent trace resistor r3 after the first trace resistor r1 and the second trace resistor r2 are connected in parallel has a resistance value of
Therefore, the power signals received by the first and second pressure sensing cells 9 and 10 located at the top are only lower than the power signals provided by the driving chip
The voltage value of (2).
Of course, it is understood that when the first connection signal line CL1 is disposed at other positions between the first signal line PL1 and the second signal line PL2, a loop can be formed between the first signal line PL1 and the second signal line PL2, so that the trace resistance of the first signal line PL1 and the trace resistance of the second signal line PL2 are in a parallel state, and the resistance value of the equivalent trace resistance is reduced, thereby reducing the attenuation of the power supply signal caused by the trace resistance.
Based on the above derivation, compared to the prior art, with the display panel provided in the embodiment of the present invention, based on the connection relationship between the first signal line PL1, the second signal line PL2 and the first connection signal line CL1, a loop can be formed between the first signal line PL1 and the second signal line PL2, so as to reduce the equivalent trace resistance of the transmission trace, and thus reduce the attenuation of the power supply signal caused by the trace resistance. When the attenuation of the power signal in the transmission process is reduced, the difference between the voltage value of the power signal received by the pressure sensing unit group 8 at the top and the voltage value of the power signal received by the pressure sensing unit group 8 at the bottom is reduced, so that the driving capability of the power signal to the pressure sensing unit groups 8 at different positions is effectively improved, the detection difference between the pressure sensing unit groups 8 is reduced, and the pressure detection precision is improved.
As shown in fig. 5, fig. 5 is a schematic structural diagram of a first connection signal line according to an embodiment of the present invention, in the M pressure sensing cell groups 8, a 1 st pressure sensing cell group 81 to an mth pressure sensing cell group 8M are sequentially arranged along a first direction, where the 1 st pressure sensing cell group 81 is located at the top of the substrate base plate 1, and the mth pressure sensing cell group 8M is located at the bottom of the substrate base plate 1. Of the N sub-pixel rows 7, the 1 st to nth sub-pixel rows 71 to 7N are sequentially arranged in a first direction parallel to the column direction.
Optionally, referring to fig. 5 again, the first connection signal line CL1 may specifically include a first connection trace CL11, the first connection trace CL11 is located between the first pressure sensing cell 9 and the second pressure sensing cell 10 in the 1 st pressure sensing cell group 8, and the first connection trace CL11 is located on a side of the 1 st sub-pixel row 71 away from the 2 nd sub-pixel row 72. The side of the 1 st sub-pixel row 71 away from the 2 nd sub-pixel row 72 as described above is referred to as the upper side of the 1 st sub-pixel row 71 with reference to the direction shown in fig. 3.
The first connecting line CL11 is disposed on the side of the 1 st sub-pixel row 71 away from the 2 nd sub-pixel row 72, so that a loop can be formed between the first signal line PL1 and the second signal line PL2, and the equivalent line resistance of the transmission line is reduced, thereby reducing the attenuation of the power signal caused by the line resistance, further effectively improving the detection difference of the pressure sensing unit groups 8 at different positions on the pressure, and improving the pressure detection precision.
Further, as shown in fig. 6, fig. 6 is a schematic view of a film structure of the first connecting signal line according to the embodiment of the present invention. It should be noted that each sub-pixel 6 specifically includes a first thin film transistor 11 and a pixel electrode 12, where the first thin film transistor 11 includes an active layer 13, a gate electrode 14, a source electrode 15, and a drain electrode 16.
Specifically, referring to fig. 6 again, the first connection trace CL11 may be disposed on the same layer as the touch signal line TP. When the first connection trace CL11 and the touch signal line TP are disposed on the same layer, although the extending direction of the touch signal line TP crosses the extending direction of the first connection trace CL11, since the first connection trace CL11 is located above the 1 st sub-pixel row 7, i.e., on the top of the substrate base plate 1, the first connection trace CL11 does not need to be disposed across a bridge with the touch signal line TP, and the wiring complexity can be reduced. In addition, the first connecting trace CL11 and the touch signal line TP are disposed on the same layer, and the two can be formed by the same composition process, so that the process flow is simplified, and the manufacturing cost is reduced.
Specifically, as shown in fig. 7, fig. 7 is another film layer structure diagram of the first connection signal line provided in the embodiment of the present invention, and the first connection trace CL11 may also be disposed at the same layer as the Gate line Gate. Because the first connecting line CL11 is located above the 1 st sub-pixel row 7, and the extending direction of the first connecting line CL11 is the same as the extending direction of the Gate line Gate, when the first connecting line CL11 and the Gate line Gate are arranged on the same layer, the bridge-crossing arrangement between the first connecting line CL11 and the Gate line Gate can be avoided, the wiring complexity is reduced, the process flow can be simplified, and the manufacturing cost is reduced.
It should be noted that, when the first connection trace CL11 is disposed on the same layer as the touch signal line TP or the Gate line Gate, the first connection trace CL11 can be electrically connected to the first signal line PL1 and the second signal line PL2 by via holes.
Optionally, as shown in fig. 8, fig. 8 is another schematic structural diagram of the first connection signal line provided in the embodiment of the present invention, the first connection signal line CL1 may specifically include M-1 second connection routing lines CL12, where one second connection routing line CL12 corresponds to one pressure sensing cell group 8 of the 2 nd to M th pressure sensing cell groups 82 to 8M, the second connection routing line CL12 is located between the first pressure sensing cell 9 and the second pressure sensing cell 10 of the pressure sensing cell group 8 corresponding to the second connection routing line CL12, and the second connection routing line CL12 is located on a side of the 1 st sub-pixel row 71 close to the 2 nd sub-pixel row 72.
It should be noted that, with the direction shown in fig. 8 as a reference, the side of the 1 st sub-pixel row 71 close to the 2 nd sub-pixel row 72 as described above refers to the lower side of the 1 st sub-pixel row 71, and the side of the 1 st sub-pixel row 71 close to the 2 nd sub-pixel row 72 is not limited to the area between the 1 st sub-pixel row 71 and the 2 nd sub-pixel row 72, for example, the second connection trace CL12 is located below the 3 rd sub-pixel row 73, and also belongs to the side of the second connection trace CL12 located at the 1 st sub-pixel row 71 close to the 2 nd sub-pixel row 72.
The M-1 second connecting traces CL12 are disposed on the side of the 1 st sub-pixel row 71 close to the 2 nd sub-pixel row 72, so that multiple loops can be formed between the first signal line PL1 and the second signal line PL2, and the attenuation of power signals caused by trace resistance is reduced, thereby effectively improving the detection difference of the pressure sensing unit group 8 at different positions on pressure. In addition, M-1 second connecting traces CL12 are disposed between the first signal line PL1 and the second signal line PL2, and when one or more second connecting traces CL12 are open or the first signal line PL1 and the second signal line PL2 are open, a loop can still be formed between the first signal line PL1 and the second signal line PL2 based on the connection relationship between the other second connecting trace CL12 and the first signal line PL1 and the second signal line PL 2.
For example, when the second connection trace CL12 between the first pressure sensing cell 9 and the second pressure sensing cell 10 of the 3 rd pressure sensing cell group 83 is broken, the first signal line PL1 and the second signal line PL2 may also form a loop through the second connection trace CL12 between the first pressure sensing cell 9 and the second pressure sensing cell 10 of the other pressure sensing cell group 8, such as the second connection trace CL12 between the first pressure sensing cell 9 and the second pressure sensing cell 10 of the 1 st pressure sensing cell group 81, and at this time, the power signal can still be transmitted on the first signal line PL1 and the second signal line PL 2. Therefore, by providing M-1 second connection traces CL12 between the first and second signal lines PL1 and PL2, the connection stability of the first and second signal lines PL1 and PL2 can be improved to ensure the normal operation of the first and second pressure sensing cells 9 and 10.
Specifically, as shown in fig. 9, fig. 9 is another schematic film layer structure diagram of the first connection signal line provided in the embodiment of the present invention, the second connection trace CL12 may be disposed on the same layer as the Gate line Gate, and since the extending direction of the second connection trace CL12 is the same as the extending direction of the Gate line Gate, when the second connection trace CL12 is disposed on the same layer as the Gate line Gate, the bridge-crossing arrangement between the second connection trace CL12 and the Gate line Gate can be avoided, and the wiring complexity can be reduced. In addition, the second connecting routing line CL12 and the Gate line Gate are arranged on the same layer, and the two lines can be formed by the same composition process, so that the process flow is simplified, and the manufacturing cost is reduced.
Specifically, as shown in fig. 10, fig. 10 is another film layer structure diagram of the first connection signal line provided in the embodiment of the invention, and for a backlight type display panel, a metal shielding layer 17 may be further disposed on a side of the first thin film transistor 1111 of each sub-pixel 6 facing the substrate 1. The metal shielding layer 17 can prevent backlight emitted from the backlight source from entering the channel region of the active layer in the first thin film transistor 11, so as to avoid the influence of the backlight on the performance of the first thin film transistor 11, and further avoid the influence on normal light emission of the display panel.
When the display panel includes the metal shielding layer 17, please refer to fig. 10 again, the second connection trace CL12 can be disposed on the same layer as the metal shielding layer 17. The second connecting trace CL12 and the metal shielding layer 17 are disposed on the same layer, and both can be formed by the same patterning process, so that the process flow is simplified, and the manufacturing cost is reduced.
It should be noted that, when the second connection trace CL12 is disposed on the same layer as the Gate line Gate or the metal shielding layer 17, the second connection trace CL12 and the first signal line PL1 and the second signal line PL2 may be electrically connected by a via.
Optionally, as shown in fig. 11, fig. 11 is another structural schematic view of the first connection signal line provided in the embodiment of the present invention, and the first connection signal line CL1 may also include the first connection trace CL11 and M-1 second connection traces CL 12. By simultaneously arranging the first connection wiring CL11 and the second connection wiring CL12 between the first signal line PL1 and the second signal line PL2, not only can a plurality of loops be formed between the first signal line PL1 and the second signal line PL2, which effectively improves the pressure detection difference of the pressure sensing unit group 8 at different positions, but also the connection stability between the first signal line PL1 and the second signal line PL2 can be further ensured.
Specifically, referring to fig. 6 and 7 again, the first connection trace may be disposed on the same layer as the touch signal line TP or the Gate line Gate, and referring to fig. 9 and 10 again, the second connection trace CL12 may be disposed on the same layer as the Gate line Gate or the metal shielding layer 17.
Further, as shown in fig. 12, fig. 12 is another structural schematic diagram of the display panel according to the embodiment of the present invention, the display panel may further include a plurality of second connection signal lines CL2, the second connection signal line CL2 is located between the first signal line PL1 and the second signal line PL2, and the second connection signal line CL2 and the second connection trace line CL12 are disposed in the same layer. The second connection signal line CL2 and the second connection trace CL12 extend in the row direction, and the distance L between any two adjacent traces is equal between the second connection signal line CL2 and the second connection trace CL 12.
It should be noted that, when a plurality of second connection signal lines CL2 are additionally disposed in the display panel, one or more second connection signal lines CL2 are disposed between two adjacent second connection traces CL12, and based on the arrangement manner, in the second connection signal line CL2 and the second connection trace CL12, "any two adjacent traces" may specifically refer to two second connection signal lines CL2, and may also refer to one second connection signal line CL2 and one second connection trace CL 12.
When the second connecting trace CL12 is disposed in the display panel, a coupling capacitor exists in an overlapping area between the second connecting trace CL12 and the Data line Data, and the coupling capacitor affects the Data signal transmitted on the Data line Data, so that the Data signal received by the sub-pixel 6 corresponding to the disposed position of the second connecting trace CL12 deviates from the standard value. Since the second connecting trace CL12 is only located in a partial region between the first signal line PL1 and the second signal line PL2, that is, only the light-emitting luminance of the sub-pixels 6 in the partial region is shifted, the second connecting trace CL12 affects the display uniformity of the display panel. By additionally arranging the second connection signal lines CL2 between the first signal line PL1 and the second signal line PL2, the overlapping area between the second connection signal line CL2 and the Data line Data may also have a coupling capacitance, and by further making the distance between any two adjacent lines in the second connection signal line CL2 and the second connection line CL12 equal, the coupling capacitance may have the same influence on the Data signals received by the sub-pixels 6 at different areas in the display panel, thereby improving the display uniformity.
In addition, since the second connection signal line CL2 and the second connection trace line CL12 both extend along the row direction, the second connection signal line CL2 and the second connection trace line CL12 are arranged in the same layer, which can avoid the bridge-crossing arrangement between the second connection signal line CL2 and the second connection trace line CL12, thereby reducing the wiring complexity, simplifying the process flow, and reducing the manufacturing cost.
Alternatively, referring to fig. 12 again, each of the second connection signal lines CL2 may be electrically connected to the first signal line PL1 and the second signal line PL2, respectively. When the second connecting signal line CL2 is electrically connected to the first signal line PL1 and the second signal line PL2, more loops may be formed between the first signal line PL1 and the second signal line PL2, thereby further increasing the connection stability between the first signal line PL1 and the second signal line PL 2.
Optionally, as shown in fig. 13, fig. 13 is another structural schematic diagram of the display panel according to the embodiment of the present invention, and each of the second connection signal lines CL2 may also be electrically connected to at least two touch electrodes 5. Since the touch electrodes 5 are reused as the common electrodes in the display period, the second connection signal line CL2 is electrically connected to at least two touch electrodes 5, so that the common voltage provided by the touch electrodes 5 can be uniformly distributed in the display area 3 in the display period, and the liquid crystal in the entire display area 3 can be turned over under the effect of the voltage difference between the common voltage and the pixel voltage provided by the pixel electrode 12, thereby realizing the image display.
It should be noted that the second connection signal line CL2 and the touch electrode 5 can be electrically connected by bridging.
Alternatively, when the second connection signal line CL2 is provided, the total number of the second connection signal line CL2 and the second connection trace CL12 may be equal to the number of the sub-pixel rows 7. Thus, the coupling capacitor can affect the data signals received by the sub-pixels 6 in each sub-pixel row 7 in the display panel, so that the coupling capacitor can uniformly affect the sub-pixels 6 in the display area 3, the light emitting brightness of all the sub-pixels 6 can be shifted, and the display uniformity is effectively improved.
Of course, the number of the second connection signal lines CL2 may be specifically set according to actual requirements, and the embodiment of the invention is not particularly limited thereto. It is understood that the number of the second connection signal lines CL2 may be equal to the number of the sub-pixel rows 7 at the maximum.
Alternatively, as shown in fig. 14, fig. 14 is another schematic structural diagram of the display panel according to the embodiment of the present invention, in which the first signal line PL1 is electrically connected to the first input terminals of the M first pressure sensing cells 9 through the M second thin film transistors 18, and the second signal line PL2 is electrically connected to the first input terminals of the M second pressure sensing cells 10 through the M third thin film transistors 19.
Wherein the control terminal of each second thin film transistor 18 is connected to one first control signal line DL1, the first terminal of each second thin film transistor 18 is electrically connected to the first input terminal of the corresponding first pressure sensing cell 9, and the second terminal of each second thin film transistor 18 is electrically connected to the first signal line PL 1. The control terminal of each third thin film transistor 19 is connected to one second control signal line DL2, the first terminal of each third thin film transistor 19 is electrically connected to the first input terminal of the second pressure sensing cell 10 corresponding thereto, and the second terminal of each third thin film transistor 19 is electrically connected to the second signal line PL 2.
Since the control terminal of each second thin film transistor 18 is connected to one first control signal line DL1, and the control terminal of each third thin film transistor 19 is connected to one second control signal line DL2, only one second thin film transistor 18 or one third thin film transistor 19 can be controlled to be turned on in each period, so that only one first pressure sensing unit 9 or one second pressure sensing unit 10 can be operated in each period, and time-sharing driving of the first pressure sensing unit 9 and the second pressure sensing unit 10 is realized.
If a plurality of first pressure sensing units 9 and second pressure sensing units 10 are operated simultaneously, in order to ensure that all pressure sensing units can operate normally, a large driving current needs to be transmitted on the first signal line PL1 and the second signal line PL2, and a large voltage drop occurs in the power supply signal. In contrast, in the manner of time-sharing driving the first pressure sensing cells 9 and the second pressure sensing cells 10, only one first pressure sensing cell 9 or one second pressure sensing cell 10 operates in each period, and only a small driving current corresponding to driving of one pressure sensing cell needs to be transmitted to the first signal line PL1 and the second signal line PL 2. When the driving current is reduced, the voltage drop of the power signal is correspondingly reduced, so that the first pressure sensing unit 9 and the second pressure sensing unit 10 are driven in a time-sharing manner, the attenuation of the power signal in the transmission process can be further reduced, and the detection difference of the pressure sensing unit groups 8 at different positions on the pressure can be further improved.
Specifically, as shown in fig. 15, fig. 15 is a schematic diagram of a film structure of the first control signal line and/or the second control signal line provided in the embodiment of the present invention, and in order to simplify the process flow and reduce the manufacturing cost, the first control signal line DL1 and/or the second control signal line DL2 may be disposed on the same layer as the touch signal line TP.
Optionally, as shown in fig. 16, fig. 16 is another schematic structural diagram of the display panel provided in the embodiment of the present invention, and the display panel may further include a fourth thin film transistor 20 and a fifth thin film transistor 21, where the types of the fourth thin film transistor 20 and the fifth thin film transistor 21 are opposite. A control terminal of the fourth thin film transistor 20 and a control terminal of the fifth thin film transistor 21 are electrically connected to a third control signal line DL3, respectively; a first terminal of the fourth thin film transistor 20 and a first terminal of the fifth thin film transistor 21 are electrically connected to the first signal line PL1 or the second signal line PL2, respectively, a second terminal of the fourth thin film transistor 20 is electrically connected to the Power supply signal terminal Power, and a second terminal of the fifth thin film transistor 21 is electrically connected to the fixed potential signal line FL.
The fixed-potential signal line FL may be a ground signal line connected to the first pressure sensing cell 9 or the second pressure sensing cell 10, or may be a common signal line connected to the touch electrode 5 multiplexed as a common electrode.
With the above arrangement, when the first and second pressure sensing cells 9 and 10 are operated, the fourth thin film transistor 20 is turned on by the first signal supplied to the third control signal line DL3, so that the first signal line PL1 or the second signal line PL2 is electrically connected to the Power supply signal terminal Power, and the Power supply signal is transmitted to the first signal line PL1 or the second signal line PL2 via the Power supply signal terminal Power, thereby driving the first and second pressure sensing cells 9 and 10. Meanwhile, since the fifth thin film transistor 21 is of the opposite type to the fourth thin film transistor 20, in this period, the fifth thin film transistor 21 is turned off by the first signal, thereby ensuring disconnection between the first signal line PL1 or the second signal line PL2 and the fixed-potential signal line FL. When the first pressure sensing unit 9 and the second pressure sensing unit 10 do not operate, the fifth thin film transistor 21 is turned on by the second signal supplied to the third control signal line DL3, so that the first signal line PL1 or the second signal line PL2 is electrically connected to the fixed-potential signal line FL, and the static electricity of the first signal line PL1 and the second signal line PL2 is led out through the fixed-potential signal line FL, thereby preventing the static electricity from flowing into the first pressure sensing unit 9 and the second pressure sensing unit 10, causing damage to the first pressure sensing unit 9 and the second pressure sensing unit 10, and preventing the static electricity from flowing into the first thin film transistor 11 in the sub-pixel 6, causing breakdown to the first thin film transistor 11, and further preventing the static electricity from affecting the display performance of the display panel. At the same time, the fourth thin film transistor 20 is turned off by the second signal, thereby ensuring disconnection between the first signal line PL1 or the second signal line PL2 and the Power signal terminal Power.
In addition, in order to realize the normal operation of the first pressure sensing units 9 and the second pressure sensing units 10, the second input ends of the M first pressure sensing units 9 are respectively connected with a third signal line, and the third signal line is used for providing a ground signal to the second input ends of the first pressure sensing units 9; second input terminals of the M second pressure sensing cells 10 are respectively connected to fourth signal lines for providing a ground signal to the second input terminals of the second pressure sensing cells 10.
Alternatively, the first pressure sensing unit 9 and/or the second pressure sensing unit 10 may be a wheatstone bridge type pressure sensor. As shown IN fig. 17, fig. 17 is a schematic structural diagram of a wheatstone bridge type pressure sensor according to an embodiment of the present invention, and when the first pressure sensing unit 9 and/or the second pressure sensing unit 10 are/is a wheatstone bridge type pressure sensor, the wheatstone bridge type pressure sensor includes a first input terminal IN1, a second input terminal IN2, a first output terminal OUT1, and a second output terminal OUT 2. A first voltage-variable resistor R1 is connected IN series between the first input terminal IN1 and the first output terminal OUT1, a second voltage-variable resistor R2 is connected IN series between the first output terminal OUT1 and the second input terminal IN2, a third voltage-variable resistor R3 is connected IN series between the second input terminal IN2 and the second output terminal OUT2, and a fourth voltage-variable resistor R4 is connected IN series between the second output terminal OUT2 and the first input terminal IN 1.
When the display panel is not deformed, the bridge is in a balanced state, that is, the ratio of the resistances of the first voltage-variable resistor R1 and the second voltage-variable resistor R2 is equal to the ratio of the resistances of the fourth voltage-variable resistor R4 and the third voltage-variable resistor R3, and the voltage value of the first output terminal OUT1 is equal to the voltage value of the second output terminal OUT 2.
When certain pressure is applied to the display panel to deform the display panel, the first voltage variable resistor R1, the second voltage variable resistor R2, the third voltage variable resistor R3 and the fourth voltage variable resistor R4 all deform, so that the resistance values of the voltage variable resistors change, and the balance state of the bridge is broken. At this time, the ratio of the resistance values of the first voltage-variable resistor R1 and the second voltage-variable resistor R2 is not equal to the ratio of the resistance values of the fourth voltage-variable resistor R4 and the third voltage-variable resistor R3, and the voltage value at the first output terminal OUT1 is not equal to the voltage value at the second output terminal OUT 2. The difference between the voltage value of the first output terminal OUT1 and the voltage value of the second output terminal OUT2 corresponds to the pressure value applied to the display panel, and the corresponding pressure value can be obtained based on the voltage value of the first output terminal OUT1, the voltage value of the second output terminal OUT2 and the corresponding relationship.
Optionally, the first pressure sensing unit 9 and/or the second pressure sensing unit 10 are/is a wheatstone bridge type pressure sensor. As shown IN fig. 18, fig. 18 is a schematic structural diagram of a silicon piezoresistive pressure sensor according to an embodiment of the present invention, the silicon piezoresistive pressure sensor has a monolithic quadrilateral structure, the silicon piezoresistive pressure sensor includes a first input terminal IN1', a second input terminal IN2', a first output terminal OUT1', a second output terminal OUT2', and a first edge, a second edge, a third edge, and a fourth edge that are sequentially connected, the first input terminal IN1 is connected to the first edge, the first output terminal OUT1 'is connected to the second edge, the second input terminal IN2 is connected to the third edge, and the second output terminal OUT2' is connected to the fourth edge. Wherein the first input terminal IN1 'and the second input terminal IN2' apply a bias voltage to the silicon piezoresistive pressure sensor.
When a certain pressure is applied to the display panel to deform the display panel, the resistance value of the silicon piezoresistive pressure sensor changes, signals output by the first output end OUT1 'and the second output end OUT2' correspondingly change, and the pressure applied to the silicon piezoresistive pressure sensor is detected through the change of the voltage on the first output end OUT1 'and the second output end OUT 2'.
As shown in fig. 19, fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 19 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
Because the display device provided by the embodiment of the invention comprises the display panel, the display device can reduce the equivalent wiring resistance of transmission wiring and reduce the attenuation of power signals caused by the wiring resistance based on the connection relation of the first signal wire, the second signal wire and the first connection signal wire in the display panel, thereby effectively improving the driving capability of the power signals to the pressure sensing unit groups at different positions, reducing the detection difference among the pressure sensing unit groups and improving the pressure detection precision.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (15)
1. A display panel is characterized by comprising a substrate base plate, wherein the substrate base plate comprises a first non-display area, a display area and a second non-display area which are sequentially arranged along a row direction, and a plurality of grid lines, a plurality of data lines, a plurality of touch electrodes and a plurality of touch signal lines are arranged in the display area; the grid lines and the data lines are crossed and insulated to define a plurality of sub-pixels, the sub-pixels form N sub-pixel rows, and N is a positive integer greater than 1; the touch control electrodes are arranged in a matrix form, each touch control signal line is electrically connected with one touch control electrode, and the touch control electrodes are reused as common electrodes in a display time period;
the display panel further includes:
the pressure sensing unit groups comprise M pressure sensing unit groups, and each pressure sensing unit group comprises a first pressure sensing unit and a second pressure sensing unit; the first pressure sensing unit is arranged in the first non-display area, the second pressure sensing unit is arranged in the second non-display area, and M is a positive integer greater than 1;
the first signal line is arranged in the first non-display area and is electrically connected with the first input ends of the M first pressure sensing units;
the second signal line is arranged in the second non-display area and is electrically connected with the first input ends of the M second pressure sensing units;
at least one first connection signal line, the first connection signal line being disposed between the first signal line and the second signal line, the first connection signal line being electrically connected with the first signal line and the second signal line, respectively;
in the M pressure sensing unit groups, the 1 st to Mth pressure sensing unit groups are sequentially arranged along a first direction, in the N sub-pixel rows, the 1 st to Nth sub-pixel rows are sequentially arranged along the first direction, and the first direction is parallel to the column direction;
the first connection signal line comprises M-1 second connection wires, one second connection wire corresponds to one pressure sensing unit group in the 2 nd to Mth pressure sensing unit groups, the second connection wire is positioned between a first pressure sensing unit and a second pressure sensing unit of the pressure sensing unit group corresponding to the second connection wire, and the second connection wire is positioned on one side, close to the 2 nd sub-pixel row, of the 1 st sub-pixel row; and a plurality of loops are formed between the first signal line and the second signal line through the second connecting wires.
2. The display panel according to claim 1,
the first connection signal line comprises a first connection trace, the first connection trace is located between a first pressure sensing unit and a second pressure sensing unit in the 1 st pressure sensing unit group, and the first connection trace is located on one side, away from the 2 nd sub-pixel row, of the 1 st sub-pixel row.
3. The display panel of claim 2, wherein the first connecting trace is disposed on the same layer as the touch signal line or the gate line.
4. The display panel according to claim 1, wherein each of the sub-pixels comprises a first thin film transistor, and a metal shielding layer is disposed on one side of the first thin film transistor facing the substrate;
the second connecting wire and the grid line or the metal shielding layer are arranged on the same layer.
5. The display panel according to claim 2, wherein the display panel further comprises a plurality of second connection signal lines, the second connection signal lines are located between the first signal lines and the second signal lines, and the second connection signal lines and the second connection traces are disposed in the same layer;
the second connection signal line and the second connection wiring extend along the row direction, and the distance between any two adjacent wirings in the second connection signal line and the plurality of second connection wirings is equal.
6. The display panel according to claim 5, wherein each of the second connection signal lines is electrically connected to the first signal line and the second signal line, respectively.
7. The display panel according to claim 5, wherein each of the second connection signal lines is electrically connected to at least two of the touch electrodes.
8. The display panel according to claim 5, wherein the total number of the second connection signal lines and the second connection traces is equal to the number of the sub-pixel rows.
9. The display panel according to claim 1, wherein the first signal line is electrically connected to the first input terminals of the M first pressure sensing cells through M second thin film transistors, and the second signal line is electrically connected to the first input terminals of the M second pressure sensing cells through M third thin film transistors;
the control end of each second thin film transistor is connected with a first control signal line, the first end of each second thin film transistor is electrically connected with the first input end of the corresponding first pressure sensing unit, and the second end of each second thin film transistor is electrically connected with the first signal line;
the control end of each third thin film transistor is connected with a second control signal line, the first end of each third thin film transistor is electrically connected with the first input end of the corresponding second pressure sensing unit, and the second end of each third thin film transistor is electrically connected with the second signal line.
10. The display panel according to claim 9, wherein the first control signal line and/or the second control signal line are disposed on the same layer as the touch signal line.
11. The display panel according to claim 1, wherein the display panel further comprises a fourth thin film transistor and a fifth thin film transistor, wherein the fourth thin film transistor and the fifth thin film transistor are of opposite types;
the control end of the fourth thin film transistor and the control end of the fifth thin film transistor are electrically connected with a third control signal line respectively; the first end of the fourth thin film transistor and the first end of the fifth thin film transistor are respectively electrically connected with a first signal line or a second signal line, the second end of the fourth thin film transistor is electrically connected with a power signal end, and the second end of the fifth thin film transistor is electrically connected with a fixed potential signal line.
12. The display panel according to claim 1, wherein the second input terminals of the M first pressure sensing units are respectively connected to a third signal line;
and second input ends of the M second pressure sensing units are respectively connected with a fourth signal wire.
13. The display panel according to any one of claims 1 to 12, wherein the first pressure sensing unit and/or the second pressure sensing unit is a wheatstone bridge type pressure sensor;
wheatstone bridge type pressure sensor establish ties between first input and the first output and have first voltage variable resistance, it has second voltage variable resistance to establish ties between first output and the second input, and it has third voltage variable resistance to establish ties between second input and the second output, the second output with it has fourth voltage variable resistance to establish ties between the first input.
14. The display panel according to any one of claims 1 to 12, wherein the first pressure sensing unit and/or the second pressure sensing unit is a silicon piezoresistive pressure sensor.
15. A display device comprising the display panel according to any one of claims 1 to 14.
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| CN107562276A (en) * | 2017-09-06 | 2018-01-09 | 厦门天马微电子有限公司 | A kind of array base palte, display panel and display device |
| CN107562284A (en) * | 2017-10-24 | 2018-01-09 | 武汉天马微电子有限公司 | Display panel and display device |
| CN107656650A (en) * | 2017-09-30 | 2018-02-02 | 厦门天马微电子有限公司 | A kind of display base plate, display panel and its display device |
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| CN107230458A (en) * | 2017-07-25 | 2017-10-03 | 上海天马微电子有限公司 | Display panel and display device |
| CN107562276A (en) * | 2017-09-06 | 2018-01-09 | 厦门天马微电子有限公司 | A kind of array base palte, display panel and display device |
| CN107656650A (en) * | 2017-09-30 | 2018-02-02 | 厦门天马微电子有限公司 | A kind of display base plate, display panel and its display device |
| CN107562284A (en) * | 2017-10-24 | 2018-01-09 | 武汉天马微电子有限公司 | Display panel and display device |
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