CN107526480B - Display panel and display device - Google Patents
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- CN107526480B CN107526480B CN201710867244.3A CN201710867244A CN107526480B CN 107526480 B CN107526480 B CN 107526480B CN 201710867244 A CN201710867244 A CN 201710867244A CN 107526480 B CN107526480 B CN 107526480B
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- 239000010410 layer Substances 0.000 claims abstract description 178
- 239000000758 substrate Substances 0.000 claims abstract description 76
- 239000002184 metal Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 9
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 238000005538 encapsulation Methods 0.000 claims description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 229920005591 polysilicon Polymers 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims 3
- 230000035945 sensitivity Effects 0.000 abstract description 19
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- Human Computer Interaction (AREA)
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Abstract
The invention provides a display panel and a display device, and relates to the technical field of display. The display panel includes: a substrate including a display area and a peripheral area surrounding the display area; wherein, the peripheral region includes: a first buffer layer disposed on the substrate; the pressure sensor is arranged on one side, far away from the substrate, of the first buffer layer and comprises a plurality of resistors and connecting wires; the first insulating layer is arranged on one side, away from the substrate, of the resistors of the pressure sensor, and is provided with at least one notch, and the vertical projection of the notch on the substrate is located in the vertical projection range of the substrate in the area surrounded by the resistors of the pressure sensor; the display area of the substrate comprises in sequence: the second buffer layer, the polycrystalline silicon layer, the grid insulating layer, the grid, the interlayer insulating layer, the source drain metal layer and the planarization layer. According to the technical scheme, the pressure detection sensitivity of the display panel can be improved, and the touch performance is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of touch display technology, the functions of touch operation modes in display products are more and more diversified, and at present, in addition to the traditional touch function, the pressure touch function is realized by arranging a pressure sensor in the display product.
Currently, a pressure sensor is generally a four-terminal device, which includes two input terminals and two output terminals, and four resistors, each connected between one input terminal and one output terminal, and two input terminals are not adjacent, and two output terminals are not adjacent. The output of resistance is connected in pressure detection circuit, at pressure touch-control in-process, to pressure sensor input drive voltage, like this when the user presses display panel, the panel can take place deformation to the voltage value that makes pressure sensor output changes, and pressure detection circuit judges the dynamics size that the user pressed according to the voltage value that pressure sensor output. However, the touch sensitivity is to be further improved.
Disclosure of Invention
Embodiments of the present invention provide a display panel and a display device, which can improve the sensitivity of pressure detection of the display panel, thereby improving the touch performance.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel includes:
a substrate comprising a display area and a peripheral area surrounding the display area;
wherein the peripheral region comprises:
a first buffer layer disposed on the substrate;
the pressure sensor is arranged on one side, far away from the substrate, of the first buffer layer and comprises a plurality of resistors and connecting wires;
the first insulating layer is arranged on one side, away from the substrate, of the resistors of the pressure sensor, and is provided with at least one notch, and the vertical projection of the notch on the substrate is located in the vertical projection range of the substrate in the area surrounded by the resistors of the pressure sensor;
the display area of the substrate comprises in sequence:
the second buffer layer, the polycrystalline silicon layer, the grid insulating layer, the grid, the interlayer insulating layer, the source drain metal layer and the planarization layer.
In a second aspect, an embodiment of the present invention provides a display device, where the display panel includes the display panel described in any one of the above.
The embodiment of the invention provides a display panel and a display device, wherein at least one groove is formed in a first insulating layer arranged above a pressure sensor, so that compared with the situation that no groove is formed, when a user presses the display panel, the deformation quantity generated when the display panel is pressed can be increased, the voltage value output by the pressure sensor is increased, the output signal quantity is increased, the pressure detection circuit can judge the pressing force of the user according to the voltage value output by the pressure sensor, the sensitivity of the pressure detection circuit for detecting the pressing force of the user is improved, and the touch performance 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 top view of a substrate according to an embodiment of the present invention;
FIG. 2 is an enlarged view of area Q of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view at AA' of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a projection of resistors and slots of a pressure sensor onto a substrate according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another projection of the resistor and the slot of a pressure sensor onto a substrate according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a pressure-sensitive sensor in an embodiment of the present invention;
FIG. 7 is another cross-sectional view at AA' of FIG. 2 in accordance with an embodiment of the present invention;
FIG. 8 is another cross-sectional view at AA' of FIG. 2 in accordance with an embodiment of the present invention;
FIG. 9 is another cross-sectional view at AA' of FIG. 2 according to an embodiment of the present invention;
FIG. 10 is another cross-sectional view at AA' of FIG. 2 in accordance with an embodiment of the present invention;
FIG. 11 is another cross-sectional view at AA' of FIG. 2 in accordance with an embodiment of the present invention;
fig. 12 is an exemplary view of a display device in 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.
The inventor researches and discovers that if the detection sensitivity of the pressure sensor is increased, the driving voltage of the pressure sensor is increased, so that the voltage value output by the pressure sensor is greatly changed, and the sensitivity can be improved. However, this method for improving the sensitivity is suitable for the case that the driving voltage does not exceed 10V, and if the sensitivity is further increased to make the driving voltage greater than 10V, black spots will appear at the corresponding positions of the pressure sensors of the display device, and the black spots will continue to become larger with time, which causes the display device to be bad and affects the display effect.
In order to solve the above technical problem, embodiments of the present invention provide the following solutions.
The embodiment of the invention provides a display panel, which can be a liquid crystal display panel or an organic light emitting display panel.
Referring to fig. 1, which is a top view of a substrate according to an embodiment of the present invention, referring to fig. 2, which is an enlarged view of a region Q in fig. 1 according to an embodiment of the present invention, referring to fig. 3, which is a cross-sectional view at AA' in fig. 2 according to an embodiment of the present invention, and fig. 3 is a cross-sectional view when a display panel is a liquid crystal display panel, as shown in fig. 1, fig. 2, and fig. 3, the display panel includes: a substrate 10, the substrate 10 including a display area a and a peripheral area B surrounding the display area a; wherein, the peripheral region B includes: a first buffer layer 11, the first buffer layer 11 being disposed on the substrate 10; at least one pressure sensor 12, wherein the pressure sensor 12 is arranged on one side of the first buffer layer 11 far away from the substrate 10, and the pressure sensor 12 comprises a plurality of resistors 121 and connecting wires 122; a first insulating layer 13, wherein the first insulating layer 13 is arranged on one side of the plurality of resistors 121 of the pressure sensor 12, which is far away from the substrate 10, the first insulating layer 13 is provided with at least one slot 14, and the vertical projection of the slot 14 on the substrate 10 is located in the vertical projection range of the substrate 10 in the area surrounded by the plurality of resistors 121 of the pressure sensor 12; the display area a of the substrate 10 includes, in order: a second buffer layer 15, a polysilicon layer 16, a gate insulating layer 17, a gate electrode 18, an interlayer insulating layer 19, a source-drain metal layer 20, and a planarization layer 21.
It should be noted that, in the embodiment of the present invention, at least one slot 14 is disposed on the first insulating layer disposed above the pressure sensor 12, so that, compared with the case that no slot is disposed, when a user presses the display panel, a deformation amount generated when the display panel is pressed can be increased, so as to increase a voltage value output by the pressure sensor, and an output signal amount is increased, so that the pressure detection circuit can determine a pressing force of the user according to the voltage value output by the pressure sensor, thereby improving a sensitivity of the pressure detection circuit for detecting the pressing force of the user, and improving a touch performance.
In addition, compared with a mode of improving the sensitivity of the pressure detection circuit for detecting the pressing force of the user by increasing the driving voltage, the embodiment of the invention avoids the mode of improving the sensitivity by increasing the driving voltage, so that the problem of black spots at the corresponding position of the pressure sensor of the display device caused by increasing the driving voltage can be avoided, the defect of the display device is avoided, and the defect of the display device is also avoided while the sensitivity and the touch performance are improved.
In a possible embodiment, the at least one slot 14 comprises one or any combination of a groove or a through hole. That is, for each slot 14, there may be a groove, or, alternatively, a through hole.
In a specific embodiment, if the trench is a groove, the depth of the groove is less than the depth of the first insulating layer.
In one possible embodiment, the shape of the perpendicular projection of the at least one slot 14 on the substrate comprises at least one of an ellipse and a polygon. Such as circular, triangular, quadrilateral, polygonal, etc.
It should be noted that, under the condition that "the vertical projection of the slot 14 on the substrate 10 is located in the vertical projection range of the substrate 10 in the area surrounded by the resistors 121 of the pressure sensor 12", the larger the vertical projection range of the slot 14 is, the better the vertical projection range is, so that when a user presses the display panel, the larger the deformation amount generated when the display panel is subjected to pressure is, and thus the larger the voltage value output by the pressure sensor is, the larger the output signal amount is, so that the pressure detection circuit can judge the magnitude of the force pressed by the user according to the voltage value output by the pressure sensor, thereby improving the sensitivity of the pressure detection circuit for detecting the magnitude of the force pressed by the user, and improving the touch performance.
In addition, the pressure sensor also has various shapes, the pressure sensor in the embodiment of the invention is illustrated as a square, and other shapes of pressure sensors exist, such as a circle, optionally, the shape of the vertical projection of the slot on the substrate can be the same as or similar to the shape of the area surrounded by the resistors in the pressure sensor, so that when a user presses the display panel, the larger the deformation quantity generated when the display panel is pressed, the larger the voltage value output by the pressure sensor, the larger the output signal quantity, so that the pressure detection circuit can judge the pressing force of the user according to the voltage value output by the pressure sensor, the sensitivity of the pressure detection circuit for detecting the pressing force of the user is improved, and the touch performance is improved.
For example, referring to fig. 4, which is a schematic diagram illustrating a projection of a resistor and a slot of a pressure sensor on a substrate according to an embodiment of the present invention, as shown in fig. 4, a vertical projection of the slot 14 on the substrate 10 is located in a vertical projection range of the substrate 10 in a region surrounded by a plurality of resistors 121 in the pressure sensor 12 (e.g., a region C surrounded by a dotted line in fig. 4), and 4 slots are disposed on a first insulating layer 13 disposed above the pressure sensor 12, and each slot is rectangular.
For another example, referring to fig. 5, which is another schematic projection diagram of the resistor and the slot of the pressure sensor on the substrate according to the embodiment of the present invention, as shown in fig. 5, a vertical projection of the slot 14 on the substrate 10 is located in a vertical projection range of the substrate 10 of a region (e.g., a region C surrounded by a dashed line in fig. 4) surrounded by a plurality of resistors 121 in the pressure sensor 12, and 12 slots are disposed on the first insulating layer 13 disposed above the pressure sensor 12, and each slot is a square.
In one possible embodiment, as shown in fig. 3, the plurality of resistors 121 may be fabricated on the same layer as the polysilicon layer 16, the first buffer layer 11 may be fabricated on the same layer as the second buffer layer 15, and the first insulating layer 13 may be fabricated on the same layer as the planarization layer 21.
It should be noted that the preparation of the resistors 121 and the polysilicon layer 16 on the same layer can be completed in one patterning process, which improves the efficiency of the process flow and reduces the production cost. In a similar way, the preparation of the first buffer layer 11 and the second buffer layer 15 on the same layer can be completed in one patterning process, so that the efficiency of the process flow is improved, and the production cost is reduced. The preparation of the first insulating layer 13 and the planarization layer 21 on the same layer can be completed in one patterning process, so that the efficiency of the process flow is improved, and the production cost is reduced.
It should be noted that, in order to meet different requirements of the display panel in practical applications, the resistance values of the resistors in the pressure sensor may also be different, and the size of the resistor may be adjusted by adjusting the doping of the material for manufacturing the resistor. In the embodiment of the present invention, the resistor 121 of the pressure sensor 12 may be made of a polysilicon material, and compared with a resistor of a pressure sensor made of a metal material, the polysilicon material is easier to adjust the resistance of the resistor by using a doping technique, that is, it is more convenient to control the doping concentration and the doped material, so that the resistance of the resistor is easier to adjust, and the pressure sensor with various resistances is more convenient to produce, thereby reducing the production cost and improving the production efficiency.
Optionally, referring to fig. 6, which is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention, the pressure sensor may be a wheatstone bridge pressure sensor, as shown IN fig. 6, the wheatstone bridge pressure sensor includes a first input terminal IN1, a second input terminal IN2, a first output terminal OUT1, a second output terminal OUT2, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. IN each pressure sensor, a first resistor R1 is electrically connected between the first input terminal IN1 and the first output terminal OUT1, a second resistor R2 is electrically connected between the second input terminal IN2 and the second output terminal OUT2, a third resistor R3 is electrically connected between the second input terminal IN2 and the first output terminal OUT1, and a fourth resistor R4 is electrically connected between the first input terminal IN1 and the second output terminal OUT 2. The first input terminal IN1 is disposed opposite to the second input terminal IN2, and the first output terminal OUT1 is disposed opposite to the second output terminal OUT 2. The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor can be wound into a quadrangle around the R4, and the vertical projection of the slot on the substrate is located in the vertical projection range of the quadrangle on the substrate.
Regarding the connection line 122 of the pressure sensor 12, the embodiment of the invention provides a possible implementation scheme, as shown in fig. 3, when the display panel is a liquid crystal display panel, the side of the plurality of resistors 121 away from the substrate 10 is further provided with a second insulating layer 22 between the plurality of resistors 121 and the first insulating layer 13, the connection line 122 of the pressure sensor 12 is disposed between the first insulating layer 13 and the second insulating layer 22, and the connection line 122 is electrically connected to the resistor 121 of the pressure sensor 12 through the first via.
Referring to fig. 7, which is another cross-sectional view at AA' in fig. 2 provided by the embodiment of the invention, and fig. 7 is a cross-sectional view of a display panel being an organic light emitting display panel, as shown in fig. 7, when the display panel is an organic light emitting display panel, a side of the resistors 121 facing away from the substrate 10 is further included between the resistors 121 and the first insulating layer 13, the connecting line 122 of the pressure sensor 12 is disposed between the first insulating layer 13 and the second insulating layer 22, and the connecting line 122 is electrically connected to the resistors 121 of the pressure sensor 12 through the first via hole.
Optionally, the display panel may further include a touch layer, the touch layer includes touch electrodes and touch leads, and the connection lines 122 may be formed on the same layer as the touch leads.
Referring to fig. 8, which is another cross-sectional view at AA' in fig. 2 provided in the embodiment of the present invention, referring to fig. 8, when the display panel further includes a touch layer, the connecting line 122 may also be disposed on a side of the first insulating layer 13 away from the substrate 10, and the connecting line 122 may be electrically connected to the resistor 121 of the pressure sensor 12 through the second via hole, as shown in fig. 8. Further, as shown in fig. 8, when the connection line 122 is provided on the side of the first insulating layer 13 facing away from the substrate 10, a third insulating layer 30 needs to be further provided between the connection line 122 and the common electrode 24.
Referring to fig. 9, which is another cross-sectional view taken at AA' in fig. 2 provided in the embodiment of the present invention, when the display panel further includes a touch layer, the connection line 122 may also be disposed on a side of the first insulating layer 13 away from the substrate 10, and the connection line 122 may be electrically connected to the resistor 121 of the pressure sensor 12 through a second via hole, as shown in fig. 9.
Referring to fig. 10, which is another cross-sectional view at AA' in fig. 2 provided in the embodiment of the present invention, referring to fig. 10, when the display panel is a liquid crystal display panel, a side of the plurality of resistors 121 facing away from the substrate 10 and a second insulating layer 22 and a first metal layer 23 are sequentially included between the plurality of resistors 121 and the first insulating layer 13, wherein the connection line 122 is electrically connected to the first metal layer 23 through a third via, and the first metal layer 23 is electrically connected to the resistor 121 of the pressure sensor 12 through a fourth via. Further, as shown in fig. 10, when the connection line 122 is provided on the side of the first insulating layer 13 facing away from the substrate 10, a third insulating layer 30 needs to be further provided between the connection line 122 and the common electrode 24.
Referring to fig. 11, which is another cross-sectional view taken at AA' in fig. 2 provided in the embodiment of the present invention, referring to fig. 11, when the display panel is an organic light emitting display panel, a side of the plurality of resistors 121 facing away from the substrate 10 is further included between the plurality of resistors 121 and the first insulating layer 13, and the second insulating layer 22 and the first metal layer 23 are sequentially included between the plurality of resistors 121 and the first insulating layer 13, wherein the connection line 122 is electrically connected to the first metal layer 23 through a third via, and the first metal layer 23 is electrically connected to the resistor 121 of the pressure sensor 12 through a fourth via.
In summary, as shown in fig. 3 or fig. 7, the first arrangement of the connection lines 122 is: the connection line 122 of the pressure sensor 12 may be disposed between the first insulating layer 13 and the second insulating layer 22. As shown in fig. 8 or fig. 9, the second arrangement of the connecting wires 122 is: the connection line 122 of the pressure sensor 12 may also be disposed above the first insulating layer 13. As shown in fig. 10 or fig. 11, the third arrangement of the connecting wires 122 is: the connection line 122 of the pressure sensor 12 may also be disposed above the first insulating layer 13, and the first metal layer 23 is disposed between the first insulating layer 13 and the second insulating layer 22, the connection line 122 is connected to the first metal layer 23 through a third via, and the first metal layer 23 is further electrically connected to the resistor of the pressure sensor 12 through a fourth via.
In the first arrangement, since a connection line (not shown) other than the connection line 122, such as a signal line, is further provided between the first insulating layer 13 and the second insulating layer 22, and the connection line 122 and the other connection line cannot be in contact with each other, therefore, if the connection lines 122 are disposed between the first insulating layer 13 and the second insulating layer 22, an additional space for disposing the connection lines 122 is required in a direction parallel to the substrate 10, in the second arrangement, the connection line 122 is disposed above the first insulating layer 13, and thus is not located at the same level as other connection lines, therefore, the vertical projection ranges of the two on the substrate 10 can be overlapped, and the additional space required to be added is not needed or reduced, therefore, compared with the first arrangement mode, the second arrangement mode is more beneficial to saving space and reducing the width of the panel.
In addition, compared with the second setting mode and the third setting mode, when the first setting mode is adopted, the distance between the connecting line 122 and the resistor 121 of the pressure sensor 12 is shorter, and the attenuation amount of the signal is increased along with the increase of the transmission distance, so that when the first setting mode is adopted, the attenuation of the signal transmitted from the connecting line 122 to the resistor 121 is less, the influence of the transmission distance on signal transmission is reduced, the sensitivity of the pressure detection circuit for detecting the degree of force pressed by the user is improved, and the touch performance is improved.
In a possible embodiment, when the display panel is a liquid crystal display panel, as shown in fig. 3, the display panel may further include a common electrode 24, and the common electrode 24 may be disposed on a side of the first insulating layer 13 facing away from the substrate 10. The common electrode 24 may be multiplexed as a touch electrode.
In another possible embodiment, when the display panel is a liquid crystal display panel, as shown in fig. 8 or fig. 10, when the connection line 122 is disposed on a side of the first insulating layer 13 facing away from the substrate 10, the third insulating layer 30 is further required to be disposed between the connection line 122 and the common electrode 24, that is, the common electrode 24 may be disposed on a side of the third insulating layer 30 facing away from the substrate 10. It should be noted that the above embodiments are only examples, and do not limit the protection scope of the present invention, and other possible connection manners of the connection line and the resistor of the pressure sensor are within the protection scope of the present disclosure.
In a possible embodiment, when the display panel is an organic light emitting display panel, as shown in fig. 7, the display panel may further include:
the light-emitting device layer 25, the light-emitting device layer 25 is arranged on one side of the planarization layer 21, which faces away from the substrate 10, the light-emitting device layer 25 sequentially comprises a first electrode 251, an organic light-emitting layer 252 and a second electrode 253, and the first electrode 251 is electrically connected with the drain electrode 26 through a fifth via hole;
and an encapsulation layer 27, wherein the encapsulation layer 27 is arranged on the side of the light-emitting device layer 25 facing away from the substrate 10, and the encapsulation layer 27 comprises at least one inorganic encapsulation layer 271 and at least one organic encapsulation layer 272.
For example, as shown in fig. 7, inorganic encapsulation layers 271 and organic encapsulation layers 272 included in the encapsulation layer 27 may be alternately stacked over the light emitting device layer 25. The illustration of disposing an organic encapsulating layer 272 and two inorganic encapsulating layers 271 in the encapsulating layer 27 is not intended to limit the specific layer structure of the encapsulating layer 27.
Alternatively, as shown in fig. 7, the organic light emitting display panel may further include a pixel defining layer 31, and the pixel defining layer 31 is disposed between the first electrode 251 and the second electrode 253.
In a possible embodiment, when the display panel is an organic light emitting display panel, as shown in fig. 7, the touch electrode 28 may be disposed on a side of the encapsulation layer 27 away from the substrate 10, or may be disposed in the encapsulation layer 27 (not shown in the figure), which is not particularly limited in this embodiment of the present invention, and is only exemplified by fig. 7 and is not used to limit the location of the touch electrode 28.
In a possible embodiment, when the display panel is an organic light emitting display panel, as shown in fig. 9, the organic light emitting display panel may further include a polarizer 29, the polarizer 29 is disposed on a side of the encapsulation layer 27 facing away from the substrate 10, and the touch electrode 28 is disposed on a side of the polarizer 29 facing away from the substrate 10.
In another possible embodiment, the first electrode 251 is an anode, the second electrode 253 is a cathode, and the touch electrode 28 can also be fabricated in the same layer as the cathode (not shown in the figure), so that the fabrication can be completed in a patterning process, thereby improving the efficiency of the process flow and reducing the production cost.
In the embodiment of the present invention, in the display panel, the second insulating layer 22 and the first insulating layer 13 are generally disposed on the side of the plurality of resistors 121 of the pressure sensor 12 away from the substrate 10, and when the display panel is a liquid crystal display panel, the common electrode 24 may be further disposed, because the thicknesses of the second insulating layer 22 and the common electrode 24 are generally relatively thin, for example, the thickness of the second insulating layer 22 is generally about 600 nanometers, and the thickness of the common electrode 24 is generally about 600 nanometers
To
If the two film layers are provided with the slots, when a user presses the display panel, the deformation amount generated when the display panel is pressed is small, the effect of improving the sensitivity is small, and the thickness of the first insulating layer 13 is large and is generally 2.5-3 micrometers. Therefore, in the embodiment of the present invention, the slot 14 is selectively disposed on the first insulating layer 13 with a larger thickness, so that when a user presses the display panel, a larger deformation amount is generated when the display panel is pressed, and the sensitivity can be obviously improved.
It should be noted that the technical solution for improving the sensitivity by forming the groove in the first insulating layer above the pressure sensor according to the embodiment of the present invention may be applied simultaneously with other solutions for improving the sensitivity in the prior art, or may be applied separately, and the embodiment of the present invention is not particularly limited to this.
It should be noted that all the drawings are schematic views, wherein some of the film layers in the display area a have the third insulating layer 30 extending to the peripheral area B, as shown in fig. 7, in other embodiments, some of the film layers in the display area a may not extend to the peripheral area B, as shown in fig. 7, and the protection scope of the present application is subject to the protection scope of the claims.
Referring to fig. 12, which is an exemplary diagram of a display device according to an embodiment of the present invention, as shown in fig. 12, the display device may include the display panel 100 according to the embodiment. It should be noted that fig. 12 illustrates a mobile phone as an example of the display device, but the display device is not limited to the mobile phone, and specifically, the display device may include, but is not limited to, any electronic device having a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), an MP4 player, or a television.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the technical solutions of the embodiments of the present invention, and the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (18)
1. A display panel, comprising:
a substrate comprising a display area and a peripheral area surrounding the display area;
wherein the peripheral region comprises:
a first buffer layer disposed on the substrate;
the pressure sensor is arranged on one side, far away from the substrate, of the first buffer layer and comprises a plurality of resistors and connecting wires;
the first insulating layer is arranged on one side, away from the substrate, of the resistors of the pressure sensor, and is provided with at least one notch, and the vertical projection of the notch on the substrate is located in the vertical projection range of the substrate in the area surrounded by the resistors of the pressure sensor;
the display area of the substrate comprises in sequence:
the second buffer layer, the polycrystalline silicon layer, the grid insulating layer, the grid, the interlayer insulating layer, the source drain metal layer and the planarization layer.
2. The display panel of claim 1, wherein the plurality of resistors and the polysilicon layer are fabricated in the same layer, the first buffer layer and the second buffer layer are fabricated in the same layer, and the first insulating layer and the planarization layer are fabricated in the same layer.
3. The display panel according to claim 2, wherein a second insulating layer is further included between the plurality of resistors and the first insulating layer on a side of the plurality of resistors facing away from the substrate, the connection line is disposed between the first insulating layer and the second insulating layer, and the connection line is electrically connected to the resistor of the pressure sensor through the first via.
4. The display panel according to claim 1,
the at least one slot comprises one of a groove or a through hole or any combination thereof.
5. The display panel according to claim 4, wherein a depth of the groove is smaller than a depth of the first insulating layer.
6. The display panel of claim 1, wherein a shape of a vertical projection of the slot on the substrate comprises at least one of an ellipse and a polygon.
7. The display panel according to claim 2, wherein the display panel further comprises a touch layer, the touch layer comprises touch electrodes and touch leads, and the connecting wires and the touch leads are prepared on the same layer.
8. The display panel according to claim 7, wherein the connection line is disposed on a side of the first insulating layer facing away from the substrate, and the connection line is electrically connected to the resistance of the pressure sensor through a second via.
9. The display panel according to claim 7, further comprising a second insulating layer and a first metal layer in sequence between the plurality of resistors and the first insulating layer on a side of the plurality of resistors facing away from the substrate,
the connecting line is electrically connected with the first metal layer through a third through hole, and the first metal layer is electrically connected with the resistor of the pressure sensor through a fourth through hole.
10. The display panel according to claim 7, wherein the display panel is a liquid crystal display panel.
11. The display panel according to claim 10, wherein the liquid crystal display panel further comprises a common electrode provided on a side of the first insulating layer facing away from the substrate;
and the common electrode is reused as a touch electrode.
12. The display panel according to claim 7, wherein the display panel is an organic light emitting display panel, and the organic light emitting display panel further comprises:
a light emitting device layer comprising, in order, a first electrode, an organic light emitting layer, and a second electrode on a side of the planarization layer facing away from the substrate, the first electrode being electrically connected to the drain electrode through a fifth via hole, and,
the packaging layer is arranged on one side, deviating from the substrate, of the light-emitting device layer and comprises at least one inorganic packaging layer and at least one organic packaging layer.
13. The display panel according to claim 12, wherein the touch electrode is disposed on a side of the encapsulation layer facing away from the substrate or within the encapsulation layer.
14. The display panel of claim 12, wherein the organic light emitting display panel further comprises a polarizer disposed on a side of the encapsulation layer facing away from the substrate, and the touch electrode is disposed on a side of the polarizer facing away from the substrate.
15. The display panel of claim 12, wherein the first electrode is an anode and the second electrode is a cathode, and the touch electrode and the cathode are fabricated in the same layer.
16. The display panel of claim 1, wherein the pressure sensor comprises a wheatstone bridge pressure sensor comprising a first input, a second input, a first output, a second output, a first resistor, a second resistor, a third resistor, and a fourth resistor;
the first resistor is connected in series between the first input end and the first output end, the second resistor is connected in series between the second input end and the second output end, the third resistor is connected in series between the second input end and the first output end, the fourth resistor is connected in series between the first input end and the second output end, the first input end and the second input end are arranged oppositely, and the first output end and the second output end are arranged oppositely.
17. The display panel according to claim 16, wherein the first resistor, the second resistor, the third resistor and the fourth resistor surround a quadrilateral, and a vertical projection of the slot on the substrate is within a vertical projection range of the quadrilateral on the substrate.
18. A display device, comprising: the display panel of any one of claims 1 to 17.
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| CN201710867244.3A CN107526480B (en) | 2017-09-22 | 2017-09-22 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710867244.3A CN107526480B (en) | 2017-09-22 | 2017-09-22 | Display panel and display device |
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| CN107526480A CN107526480A (en) | 2017-12-29 |
| CN107526480B true CN107526480B (en) | 2020-04-28 |
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| CN113163045B (en) | 2020-01-22 | 2023-08-04 | 华为技术有限公司 | Pressure detection structure and electronic equipment |
| US12213343B2 (en) | 2020-12-23 | 2025-01-28 | Boe Technology Group Co., Ltd. | Display panel and manufacturing method thereof, and display device |
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| CN1057336A (en) * | 1990-06-08 | 1991-12-25 | 涂相征 | A kind of silicon film pressure sensor and manufacture method thereof |
| CN102576732A (en) * | 2009-07-18 | 2012-07-11 | 株式会社半导体能源研究所 | Semiconductor device and method for manufacturing semiconductor device |
| JP2016121972A (en) * | 2014-12-25 | 2016-07-07 | 大日本印刷株式会社 | Pressure sensor |
| CN106201063A (en) * | 2016-06-27 | 2016-12-07 | 华为技术有限公司 | Touch pressure detection device, display screen and touch electronic equipment |
| CN107092120A (en) * | 2017-06-30 | 2017-08-25 | 上海天马微电子有限公司 | Array substrate, display panel and display device |
| CN107134462A (en) * | 2017-06-30 | 2017-09-05 | 厦门天马微电子有限公司 | Array base palte and touch-control display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5396335B2 (en) * | 2009-05-28 | 2014-01-22 | 株式会社半導体エネルギー研究所 | Touch panel |
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| CN1057336A (en) * | 1990-06-08 | 1991-12-25 | 涂相征 | A kind of silicon film pressure sensor and manufacture method thereof |
| CN102576732A (en) * | 2009-07-18 | 2012-07-11 | 株式会社半导体能源研究所 | Semiconductor device and method for manufacturing semiconductor device |
| JP2016121972A (en) * | 2014-12-25 | 2016-07-07 | 大日本印刷株式会社 | Pressure sensor |
| CN106201063A (en) * | 2016-06-27 | 2016-12-07 | 华为技术有限公司 | Touch pressure detection device, display screen and touch electronic equipment |
| CN107092120A (en) * | 2017-06-30 | 2017-08-25 | 上海天马微电子有限公司 | Array substrate, display panel and display device |
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