CN107797706B - Pressure induction sensor, display panel and device - Google Patents

Pressure induction sensor, display panel and device Download PDF

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Publication number
CN107797706B
CN107797706B CN201711068788.XA CN201711068788A CN107797706B CN 107797706 B CN107797706 B CN 107797706B CN 201711068788 A CN201711068788 A CN 201711068788A CN 107797706 B CN107797706 B CN 107797706B
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CN
China
Prior art keywords
bridge
pressure
length
sensitive sensor
display panel
Prior art date
Application number
CN201711068788.XA
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Chinese (zh)
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CN107797706A (en
Inventor
李东华
魏晓丽
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厦门天马微电子有限公司
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Priority to CN201711068788.XA priority Critical patent/CN107797706B/en
Publication of CN107797706A publication Critical patent/CN107797706A/en
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Publication of CN107797706B publication Critical patent/CN107797706B/en

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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/13338Input devices, e.g. touch-panels
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Abstract

The embodiment of the invention provides a pressure induction sensor, a display panel and a device display; the pressure-sensitive sensor in the embodiment of the invention comprises: the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge are linear connecting bridges; the first connecting bridge and the second connecting bridge are arranged in a nested manner, and the third connecting bridge and the fourth connecting bridge are arranged in a nested manner. Because the first connecting bridge and the second connecting bridge are arranged in a nested manner, and part or all of the first connecting bridge and the second connecting bridge are close to each other, the temperatures of the first connecting bridge and the second connecting bridge can be supplemented with each other, so that the temperatures of the first connecting bridge and the second connecting bridge are basically the same; in a similar way, the temperatures of the third connecting bridge and the fourth connecting bridge are basically the same, and compared with the prior art, the detection result obtained by the pressure sensing sensor under the condition is higher in accuracy, so that the accuracy of the detection result of the pressure sensing sensor is improved.

Description

Pressure induction sensor, display panel and device

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of touch control, in particular to a pressure induction sensor, a display panel and a device.

[ background of the invention ]

Display panels with touch control functions are widely used in various display devices such as mobile phones, tablet computers, and information query machines in halls of public places. The user can operate the display device by touching the mark on the display panel with fingers, so that the dependence of the user on other input equipment (such as a keyboard, a mouse and the like) is eliminated, and the man-machine interaction is simpler.

In order to better meet the user requirements, a pressure sensing sensor is usually arranged in the touch display panel and used for detecting the pressure when the user presses the touch display panel, so that the touch display panel can not only collect touch position information, but also collect the pressure, and the application range of the touch technology is widened.

In the prior art, a pressure-sensitive sensor 100 as shown in fig. 1 is generally used to detect the magnitude of pressure applied to a display panel, fig. 1 is a schematic structural diagram of the pressure-sensitive sensor 100, and in fig. 1, the pressure-sensitive sensor 100 includes:

a first connecting bridge 101, a second connecting bridge 102, a third connecting bridge 103, a fourth connecting bridge 104, a first input 1111, a second input 1112, a first output 1113 and a second output 1114.

Wherein the resistance of the first connecting bridge 101 is R1The resistance of the second connecting bridge 102 is R2The resistance of the third connecting bridge 103 is R3The fourth connecting bridge 104 has a resistance R4

The working principle of the pressure-sensitive sensor 100 is:

when the resistance values of the first to fourth connecting bridges satisfy the bridge balance conditionWhen the first output terminal 1113 and the second output terminal 1114 have the same potential, the pressure-sensitive detection signals output by the first output terminal 1113 and the second output terminal 1114 are zero. When the touch main body presses the display panel, the first to fourth connecting bridges deform, the resistance values of the first to fourth connecting bridges change, and the resistance values of the first to fourth connecting bridges do not satisfy the bridge balance conditionThe pressure can be detected according to the pressure sensing signals output by the first output terminal 1113 and the second output terminal 1114.

The resistance value of the connecting bridge of the pressure sensor 100 is affected by the temperature in addition to the deformation, wherein the resistance value of the same connecting bridge is different under different temperatures and the same deformation, and since the detection result of the pressure sensor 100 is related to the resistance value of the connecting bridge, if the detection result with higher accuracy is to be obtained, the four connecting bridges of the pressure sensor 100 are all at the same temperature as much as possible.

However, when the display panel is in operation, temperatures of different positions of the display panel may be different, which may cause the four connecting bridges of the pressure-sensitive sensor 100 to be at different temperatures, thereby causing the accuracy of the detection result of the pressure-sensitive sensor 100 to be low.

[ summary of the invention ]

In view of this, embodiments of the present invention provide a pressure-sensitive sensor, a display panel and a device, so as to solve the problem of low accuracy of a detection result of the pressure-sensitive sensor in the prior art.

In a first aspect, an embodiment of the present invention provides a pressure-sensitive sensor, including:

a first signal input terminal, a second signal input terminal, a first signal output terminal and a second signal output terminal;

the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge;

the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge all comprise a first end and a second end;

the second end of the first connecting bridge and the first end of the second connecting bridge are both connected with the first signal output end;

the second end of the second connecting bridge and the first end of the third connecting bridge are both connected with the first signal input end;

the second end of the third connecting bridge and the first end of the fourth connecting bridge are both connected with the second signal output end;

the second end of the fourth connecting bridge and the first end of the first connecting bridge are both connected with the second signal input end;

the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge are linear connecting bridges;

the first connecting bridge and the second connecting bridge are arranged in a nested manner, and the third connecting bridge and the fourth connecting bridge are arranged in a nested manner;

the first connecting bridge and the second connecting bridge have different lengths in a first direction and/or different lengths in a second direction;

in the first direction, the third connecting bridge and the fourth connecting bridge are different in length, and/or in the second direction, the third connecting bridge and the fourth connecting bridge are different in length;

wherein the first direction and the second direction are perpendicular to each other.

In a second aspect, an embodiment of the present invention further provides another display panel, where the display panel includes:

the display device comprises a substrate, a first electrode and a second electrode, wherein the substrate comprises a display area and a non-display area surrounding the periphery of the display area;

the thin film transistor is positioned in the substrate display area and comprises an active layer and a metal layer;

the pressure induction sensor is arranged on the substrate, and the pressure induction sensor and the active layer or the metal layer are prepared on the same layer.

In a third aspect, an embodiment of the present invention further provides a display device, including any one of the display panels described above.

One of the above technical solutions has the following beneficial effects:

because the first connecting bridge and the second connecting bridge are arranged in a nested manner, and part or all of the first connecting bridge and the second connecting bridge are close to each other, the temperatures of the first connecting bridge and the second connecting bridge can be supplemented with each other, so that the temperatures of the first connecting bridge and the second connecting bridge are basically the same; similarly, the temperature of the third connecting bridge is basically the same as that of the fourth connecting bridge, and the detection result obtained by the pressure-sensitive sensor under the condition is higher in accuracy compared with the prior art.

[ 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 inventive labor.

Fig. 1 is a schematic structural diagram of a pressure-sensitive sensor provided in the prior art;

fig. 2 is a schematic structural diagram of a pressure-sensitive sensor according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another pressure-sensitive sensor provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of another pressure-sensitive sensor provided by an embodiment of the present invention;

FIG. 5 is a top view of a display panel according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of the display area of FIG. 5 provided by an embodiment of the present invention;

FIG. 7 is a cross-sectional view along direction AA' of FIG. 6 provided in accordance with an embodiment of the present invention;

FIG. 8 is a partial cross-sectional view of FIG. 5 provided by an embodiment of the present invention;

fig. 9 is a top view of a display device according to an embodiment of the 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 word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

An embodiment of the present invention provides a pressure-sensitive sensor 200, and for example, a schematic structural diagram of the pressure-sensitive sensor 200 is shown in fig. 2 to 4, the pressure-sensitive sensor 200 includes:

a first signal input terminal 201, a second signal input terminal 202, a first signal output terminal 203, and a second signal output terminal 204;

a first connecting bridge 205, a second connecting bridge 206, a third connecting bridge 207 and a fourth connecting bridge 208;

the first connection bridge 205, the second connection bridge 206, the third connection bridge 207 and the fourth connection bridge 208 each comprise a first end and a second end;

the second end of the first connecting bridge 205 and the first end of the second connecting bridge 206 are both connected with the first signal output end 203;

the second end of the second connecting bridge 206 and the first end of the third connecting bridge 207 are both connected to the first signal input terminal 201;

the second end of the third connecting bridge 207 and the first end of the fourth connecting bridge 208 are both connected with the second signal output end 204;

the second end of the fourth connecting bridge 208 and the first end of the first connecting bridge 205 are both connected to the second signal input terminal 202;

the first connecting bridge 205, the second connecting bridge 206, the third connecting bridge 207 and the fourth connecting bridge 208 are linear connecting bridges;

the first connecting bridge 205 and the second connecting bridge 206 are arranged in a nested manner, and the third connecting bridge 207 and the fourth connecting bridge 208 are arranged in a nested manner;

in the first direction, the first connecting bridge 205 and the second connecting bridge 206 are different in length, and/or in the second direction, the first connecting bridge 205 and the second connecting bridge 206 are different in length;

the third connecting bridge 207 and the fourth connecting bridge 208 have different lengths in the first direction, and/or the third connecting bridge 207 and the fourth connecting bridge 208 have different lengths in the second direction;

wherein the first direction and the second direction are perpendicular to each other.

The nested arrangement refers to that a gap exists in the shape of one object, and part or all of the other object is arranged in the gap of the object, and the two objects are not in contact with each other, or the nested arrangement refers to that a gap exists in the shape of both the two objects, and part or all of the two objects are arranged in the gap of each other, and the two objects are not in contact with each other.

In fig. 2 and 4, the first connecting bridge 205, the second connecting bridge 206, the third connecting bridge 207 and the fourth connecting bridge 208 are spiral-shaped, and each connecting bridge has an outer shape in which a gap exists, wherein a portion of the first connecting bridge 205 and a portion of the second connecting bridge 206 are arranged in the gap of each other, and a portion of the third connecting bridge 207 and a portion of the fourth connecting bridge 208 are arranged in the gap of each other. In fig. 3, the first connecting bridge 205, the second connecting bridge 206, the third connecting bridge 207 and the fourth connecting bridge 208 are zigzag, a gap exists in the outer shape of the first connecting bridge 205, a part of the second connecting bridge 206 is arranged in the gap of the first connecting bridge 205, a gap exists in the outer shape of the third connecting bridge 207, and a part of the fourth connecting bridge 208 is arranged in the gap of the third connecting bridge 207. Wherein, because the first connecting bridge 205 and the second connecting bridge 206 are nested, and part or all of the first connecting bridge 205 and the second connecting bridge 206 are close to each other, the temperatures of the first connecting bridge 205 and the second connecting bridge 206 can be supplemented to each other, so that the temperatures of each other are basically the same; similarly, the temperature of the third connecting bridge 207 and the fourth connecting bridge 208 is substantially the same.

In fig. 2 to 4, the first direction is a horizontal direction, and the second direction is a vertical direction. The embodiment of the invention only exemplarily shows the first direction and the second direction, and in practical application, the first direction and the second direction can be set according to practical requirements. In fig. 2 to 4, the first connecting bridge 205 and the second connecting bridge 206 have different lengths in the first direction and the second direction; the third connecting bridge 207 and the fourth connecting bridge 208 are different in length in the first direction and the second direction.

It should be noted that, in the embodiment of the present invention, the lengths of the first connecting bridge 205 and the second connecting bridge 206 in the first direction and/or the second direction are set to be different lengths, and the lengths of the third connecting bridge 207 and the fourth connecting bridge 208 in the first direction and/or the second direction are set to be different lengths, for the following reasons:

if the lengths of the first connecting bridge 205 and the second connecting bridge 206 in the first direction are the same, and the lengths in the second direction are the same, and in addition, the lengths of the third connecting bridge 207 and the fourth connecting bridge 208 in the first direction are the same, and the lengths in the second direction are the same, under the condition of the same temperature, the deformations of the first connecting bridge 205 and the second connecting bridge 206 in the first direction are the same, and the deformations in the second direction are the same, which may cause the resistance changes of the first connecting bridge 205 and the second connecting bridge 206 to be the same, and similarly, the resistance changes of the third connecting bridge 207 and the fourth connecting bridge 208 are the same, which may cause the voltage signals output by the first signal output terminal 203 and the second signal output terminal 204 to be unchanged, and may not detect the magnitude of the pressure applied to the display panel 300. Therefore, in the embodiment of the present invention, in order to enable the pressure-sensitive sensor 200 to detect the pressure, the lengths of the first connecting bridge 205 and the second connecting bridge 206 in the first direction and/or the second direction are set to be different, and the lengths of the third connecting bridge 207 and the fourth connecting bridge 208 in the first direction and/or the second direction are set to be different.

Because the first connecting bridge 205 and the second connecting bridge 206 are arranged in a nested manner, and part or all of the first connecting bridge 205 and the second connecting bridge 206 are close to each other, the temperatures of the first connecting bridge 205 and the second connecting bridge 206 can be supplemented to each other, so that the temperatures of each other are basically the same; similarly, the temperature of the third connecting bridge 207 and the fourth connecting bridge 208 is substantially the same, and the detection result obtained by the pressure-sensitive sensor 200 in this case is higher in accuracy compared with the prior art.

In addition, under the condition of the same length and material, the smaller the cross-sectional area of the connecting bridge is, the larger the resistance value of the connecting bridge is, because in the embodiment of the present invention, the four connecting bridges of the pressure-sensitive sensor 200 are all linear, compared with the block-shaped connecting bridge in the prior art, the smaller the cross-sectional area of the linear connecting bridge is, the larger the resistance value of the linear connecting bridge is, when the resistance values of the linear connecting bridge and the block-shaped connecting bridge are the same, the area occupied by the linear connecting bridge is smaller than that occupied by the block-shaped connecting bridge, because the pressure-sensitive sensor 200 is arranged in the frame of the display panel 300, the smaller the area occupied by the pressure-sensitive sensor 200 in the embodiment of the present.

Moreover, in the prior art, the distance between the block-shaped connecting bridges is relatively long, which results in a relatively large area occupied by the pressure-sensitive sensor 100 in the prior art and a relatively large frame width, whereas in the embodiment of the present invention, the connecting bridges are nested, which results in a relatively small area occupied by the pressure-sensitive sensor 200 in the embodiment of the present invention, so that the frame width can be reduced.

Alternatively, referring to fig. 2, the length of the first connecting bridge 205 in the first direction is greater than the length of the first connecting bridge 205 in the second direction, and the length of the second connecting bridge 206 in the first direction is less than the length of the second connecting bridge 206 in the second direction.

For a connecting bridge, if the length of the connecting bridge in the first direction is greater than the length of the connecting bridge in the second direction, the connecting bridge is mainly used for sensing and detecting the force in the first direction, and if the length of the connecting bridge in the first direction is less than the length of the connecting bridge in the second direction, the connecting bridge is mainly used for sensing and detecting the force in the second direction. As can be seen, in fig. 2, the first connecting bridge 205 is mainly used for sensing and detecting the force in the first direction. The second connecting bridge 206 is mainly used for sensing and detecting the force in the second direction.

Alternatively, referring to fig. 2, the length of the third connecting bridge 207 in the first direction is greater than the length of the third connecting bridge 207 in the second direction, and the length of the fourth connecting bridge 208 in the first direction is less than the length of the fourth connecting bridge 208 in the second direction.

In fig. 2, the third connecting bridge 207 is mainly used for sensing and detecting the force in the first direction. The fourth connecting bridge 208 is mainly used for sensing and detecting the force in the second direction.

Alternatively, referring to fig. 4, the length of the third connecting bridge 207 in the first direction is smaller than the length of the third connecting bridge 207 in the second direction, and the length of the fourth connecting bridge 208 in the first direction is larger than the length of the fourth connecting bridge 208 in the second direction.

In fig. 4, the third connecting bridge 207 is mainly used for sensing and detecting the force in the second direction. The fourth connecting bridge 208 is mainly used for sensing and detecting the force in the first direction.

In fig. 4, the length of the first connecting bridge 205 in the first direction is greater than the length of the first connecting bridge 205 in the second direction, and the length of the second connecting bridge 206 in the first direction is less than the length of the second connecting bridge 206 in the second direction. The first connecting bridge 205 is mainly used for sensing and detecting a force in a first direction. The second connecting bridge 206 is mainly used for sensing and detecting the force in the second direction.

Alternatively, referring to fig. 3, the length of the first connecting bridge 205 in the first direction is greater than the length of the first connecting bridge 205 in the second direction, and the length of the second connecting bridge 206 in the first direction is greater than the length of the second connecting bridge 206 in the second direction.

In fig. 3, the first connecting bridge 205 is mainly used for sensing and detecting a force in a first direction. The second connecting bridge 206 is mainly used for sensing and detecting the force in the first direction.

Alternatively, referring to fig. 3, the length of the third connecting bridge 207 in the first direction is smaller than the length of the third connecting bridge 207 in the second direction, and the length of the fourth connecting bridge 208 in the first direction is smaller than the length of the fourth connecting bridge 208 in the second direction.

In fig. 3, the third connecting bridge 207 is mainly used for sensing and detecting the force in the second direction. The fourth connecting bridge 208 is mainly used for sensing and detecting the force in the second direction.

Alternatively, referring to fig. 2 and 4, the first connecting bridge 205 and the second connecting bridge 206 are spiral, and the third connecting bridge 207 and the fourth connecting bridge 208 are spiral.

Alternatively, referring to fig. 3, the first connecting bridge 205 and the second connecting bridge 206 are zigzag, and the third connecting bridge 207 and the fourth connecting bridge 208 are zigzag.

Optionally, the material of the first connection bridge 205, the second connection bridge 206, the third connection bridge 207, and the fourth connection bridge 208 is amorphous silicon.

In the prior art, crystalline silicon is typically used to fabricate the connecting bridges in the pressure-sensitive sensor 200. The resistivity of the amorphous silicon is greater than that of the crystalline silicon, and the resistance value of the connecting bridge made of the amorphous silicon is greater than that of the connecting bridge made of the crystalline silicon in the prior art under the same other conditions, wherein the greater the resistance value of the connecting bridge is, the more accurate the detection result of the pressure sensing sensor 200 is, and then under the same other conditions, the greater the resistance value of the connecting bridge of the pressure sensing sensor 200 in the embodiment of the present invention is, the more accurate the detection result of the pressure sensing sensor 200 in the embodiment of the present invention is.

An embodiment of the present invention further provides a display panel 300, referring to fig. 5, fig. 6 and fig. 7, where fig. 5 is a top view of the display panel 300, fig. 6 is an enlarged schematic view of a portion of a display area 301 in fig. 5, and fig. 7 is a cross-sectional view along an AA' direction in fig. 6, and the display panel 300 includes:

a substrate including a display region 301 and a non-display region 302 surrounding the display region 301;

a thin film transistor 6 positioned in the display region of the substrate, the thin film transistor 6 including an active layer 64 and a metal layer;

any one of the pressure-sensitive sensors 200 is disposed on a substrate, and the pressure-sensitive sensor 200 is fabricated on the same layer as the active layer 64 or the metal layer.

In fig. 5, the display panel 300 includes a display area 301 at a central position, and a non-display area 302 surrounding the periphery of the display area 301. Optionally, at least one pressure-sensitive sensor 200 is disposed at opposite side edge positions of the display panel 300, respectively. The display panel 300 further includes a thin film transistor 6 located in the display region 301, the thin film transistor 6 including a source electrode 61, a drain electrode 62, an active layer 64, and a gate electrode 63; the display panel 300 further includes a metal layer, which may be a layer required by any metal structure, such as a source-drain metal layer, a gate metal layer, or the like, where the source-drain metal layer is a metal layer where the source 61 and the drain 62 are located, and the gate metal layer is a metal layer where the gate 63 is located; the pressure-sensitive sensor 200 is disposed in the same layer as the active layer 64 or the metal layers, the pressure-sensitive sensor 200 may be made of a semiconductor material or a metal material, if the pressure-sensitive sensor 200 is made of a semiconductor material, it is disposed in the same layer as the active layer 64, the pressure-sensitive sensor 200 may be formed while the active layer 64 is formed, and if the pressure-sensitive sensor 200 is made of a metal material, it is disposed in the same layer as other metal layers in the display panel 300, and the pressure-sensitive sensor 200 may be formed while other metal structures are formed.

In order to more clearly embody the film layer structure of the display panel 300, the following exemplary descriptions are made:

for example, if the display panel is a liquid crystal display panel, as shown in fig. 6 and 7, the display panel 300 includes a plurality of gate lines 8 and a plurality of data lines 7, the plurality of gate lines 8 and the plurality of data lines 7 intersect to define a plurality of sub-pixel units distributed in a matrix, each sub-pixel unit is correspondingly provided with a thin film transistor 6, a source 61 of the thin film transistor 6 is connected to the corresponding data line 7, a drain 62 of the thin film transistor 6 is connected to a corresponding pixel electrode (not shown), and a gate 63 of the thin film transistor 6 is connected to the corresponding gate line 8. The liquid crystal display panel comprises an array substrate and a color film substrate which are oppositely arranged, and a liquid crystal layer is arranged between the array substrate and the color film substrate. The data lines 7 are used for transmitting data signals, the gate lines 8 are used for transmitting scanning signals, in the working process of the liquid crystal display panel, the thin film transistors 6 corresponding to the gate lines 8 are sequentially conducted in a row unit under the control of the scanning signals, meanwhile, the data lines 7 sequentially transmit the data signals to the corresponding pixel electrodes so that the pixel electrodes are charged, an electric field is formed between the pixel electrodes and the common electrode to drive liquid crystal in the liquid crystal layer to deflect, so that normal display is achieved, the color film substrate comprises a latticed black matrix and a plurality of color resistors arranged in the black matrix opening in an array mode, and the color resistors comprise red color resistors, green color resistors and blue color resistors. The pressure sensing sensor 200 may be made of a semiconductor material or a metal material, and if the pressure sensing sensor 200 is made of a semiconductor material, the pressure sensing sensor 200 is disposed on the same layer as the active layer 64, and the pressure sensing sensor 200 may be formed through the same patterning process while the active layer 64 is manufactured, thereby saving the process times and reducing the cost; if the pressure-sensitive sensor 200 is made of a metal material, it is disposed on the same layer as any metal layer in the liquid crystal display panel, for example, the pressure-sensitive sensor 200 is disposed on the same layer as the gate 63, or the pressure-sensitive sensor 200 is disposed on the same layer as the source 61 and the drain 62, and if other metal layers are disposed in the liquid crystal display panel, for example, the metal layer where the touch signal line is located, the pressure-sensitive sensor 200 may also be disposed on the same layer as the touch signal line, so that the pressure-sensitive sensor 200 may be formed through the same patterning process while the metal layers are manufactured, thereby saving the number of processes and reducing the cost. In addition, in the prior art, the lead of the pressure sensor 100 is generally disposed in the frame of the same film layer as the traces of other circuits in the display panel, and the lead of the pressure sensor 100 and the traces of other circuits occupy a large area, thereby resulting in a wide frame width. In the embodiment of the present invention, the lead lines of the pressure sensor 200 and the traces of other circuits in the display panel 300 may be disposed in the frame of different film layers, so as to reduce the frame width. In addition, because the first connecting bridge and the second connecting bridge are arranged in a nested manner, and the third connecting bridge and the fourth connecting bridge are arranged in a nested manner, the connecting bridges are closer to each other, the occupied area is smaller, and when the pressure sensing sensor is arranged in a non-display area, compared with the prior art, the frame occupied by the pressure sensing sensor can be reduced, so that the influence of temperature on the sensing sensitivity of the pressure sensing sensor can be reduced, the width of the frame can be effectively reduced, and the narrow frame is favorably realized.

Illustratively, if the display panel 300 is an Organic Light Emitting display panel, the Organic Light Emitting display panel includes an array substrate, the array substrate includes a plurality of pixel circuits, the Organic Light Emitting display panel further includes a plurality of Organic Light Emitting Diodes (OLEDs) disposed on the array substrate, an anode of each of the Organic Light Emitting diodes is electrically connected to the pixel circuits on the array substrate, as shown in fig. 8, fig. 8 is a partial cross-sectional view of fig. 5, each of the Organic Light Emitting diodes E includes an anode layer 81, a Light Emitting layer 82, and a cathode layer 83, the pixel circuits include a thin film transistor 6, the thin film transistor 6 includes a source electrode 61, a drain electrode 62, a gate electrode 63, and an active layer 64, the pixel circuits further include a storage capacitor Cst, the storage capacitor Cst includes a first C electrode plate 1 and a second electrode plate C2, wherein the gate electrode 63 and the second electrode plate 2 are disposed on a first conductive layer, the first electrode plate C1 is located on the second conductive layer, the source electrode 61 and the drain electrode 62 are located on the third conductive layer, the second conductive layer, the first conductive layer and the active layer 63 are sequentially disposed on the anode layer 81 far from the cathode layer 83, and the anode layer 81 of the organic light emitting diode E is connected to the drain electrode 62 of the corresponding thin film transistor through a via hole. The plurality of light emitting diodes include a light emitting diode for emitting red light, a light emitting diode for emitting green light, and a light emitting diode for emitting blue light. The pressure sensing sensor 200 may be made of a semiconductor material or a metal material, and if the pressure sensing sensor 200 is made of a semiconductor material, the pressure sensing sensor 200 is disposed on the same layer as the active layer 64, and the pressure sensing sensor 200 may be formed through the same patterning process while the active layer 64 is manufactured, thereby saving the process times and reducing the cost; if the pressure-sensitive sensor 200 is made of a metal material, it is disposed on the same layer as any metal layer in the organic light-emitting display panel, for example, the pressure-sensitive sensor 200 is disposed on the same layer as the gate 63, or the pressure-sensitive sensor is disposed on the same layer as the source 61 and the drain 62, or the pressure-sensitive sensor 200 is disposed on the same layer as the first electrode plate C1, one of the anode layer 81 and the cathode layer 83 is a reflective electrode, the other is a transparent electrode, and light in the light-emitting layer 82 is emitted from one side of the transparent electrode. In addition, in the prior art, the lead of the pressure sensor 100 is generally disposed in the frame of the same film layer as the traces of other circuits in the display panel, and the lead of the pressure sensor 100 and the traces of other circuits occupy a large area, thereby resulting in a wide frame width. In the embodiment of the present invention, the lead lines of the pressure sensor 200 and the traces of other circuits in the display panel 300 may be disposed in the frame of different film layers, so as to reduce the frame width. In addition, because the first connecting bridge and the second connecting bridge are arranged in a nested manner, and the third connecting bridge and the fourth connecting bridge are arranged in a nested manner, the connecting bridges are closer to each other, the occupied area is smaller, and when the pressure sensing sensor is arranged in a non-display area, compared with the prior art, the frame occupied by the pressure sensing sensor can be reduced, so that the influence of temperature on the sensing sensitivity of the pressure sensing sensor can be reduced, the width of the frame can be effectively reduced, and the narrow frame is favorably realized.

For example, if the display panel is a Micro Light-Emitting Diode display panel, the Micro Light-Emitting Diode display panel includes an array substrate, the array substrate includes a plurality of pixel circuits, the Micro Light-Emitting Diode display panel further includes a plurality of Micro Light-Emitting diodes (Mic-LEDs) disposed on the array substrate, an anode of each Micro Light-Emitting Diode is electrically connected to a corresponding pixel circuit on the array substrate, and the plurality of Micro Light-Emitting diodes include a Micro Light-Emitting Diode for Emitting red Light, a Micro Light-Emitting Diode for Emitting green Light, and a Micro Light-Emitting Diode for Emitting blue Light.

An embodiment of the present invention further provides a display device 400, a top view of the display device 400 is shown in fig. 9, and in fig. 9, the display device 400 includes any one of the display panels 300 described above.

The display device 400 may be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, or a television.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A pressure sensitive sensor, comprising:
a first signal input terminal, a second signal input terminal, a first signal output terminal and a second signal output terminal;
the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge;
the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge all comprise a first end and a second end;
the second end of the first connecting bridge and the first end of the second connecting bridge are both connected with the first signal output end;
the second end of the second connecting bridge and the first end of the third connecting bridge are both connected with the first signal input end;
the second end of the third connecting bridge and the first end of the fourth connecting bridge are both connected with the second signal output end;
the second end of the fourth connecting bridge and the first end of the first connecting bridge are both connected with the second signal input end;
the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge are linear connecting bridges;
the first connecting bridge and the second connecting bridge are arranged in a nested manner, and the third connecting bridge and the fourth connecting bridge are arranged in a nested manner;
the first connecting bridge and the second connecting bridge have different lengths in a first direction and/or different lengths in a second direction;
in the first direction, the third connecting bridge and the fourth connecting bridge are different in length, and/or in the second direction, the third connecting bridge and the fourth connecting bridge are different in length;
wherein the first direction and the second direction are perpendicular to each other;
the first connecting bridge and the second connecting bridge are in a spiral shape, and the third connecting bridge and the fourth connecting bridge are in a spiral shape;
gaps are formed in the shapes of the first connecting bridge, the second connecting bridge, the third connecting bridge and the fourth connecting bridge, wherein one part of the first connecting bridge and one part of the second connecting bridge are arranged in the gaps, and one part of the third connecting bridge and one part of the fourth connecting bridge are arranged in the gaps.
2. Pressure-sensitive sensor according to claim 1,
the length of the first connecting bridge in the first direction is greater than that of the first connecting bridge in the second direction, and the length of the second connecting bridge in the first direction is less than that of the second connecting bridge in the second direction.
3. Pressure-sensitive sensor according to claim 2,
the length of the third connecting bridge in the first direction is greater than that of the third connecting bridge in the second direction, and the length of the fourth connecting bridge in the first direction is less than that of the fourth connecting bridge in the second direction.
4. Pressure-sensitive sensor according to claim 2,
the length of the third connecting bridge in the first direction is smaller than that of the third connecting bridge in the second direction, and the length of the fourth connecting bridge in the first direction is larger than that of the fourth connecting bridge in the second direction.
5. Pressure-sensitive sensor according to claim 1,
the length of the first connecting bridge in the first direction is greater than the length of the first connecting bridge in the second direction, and the length of the second connecting bridge in the first direction is greater than the length of the second connecting bridge in the second direction.
6. Pressure-sensitive sensor according to claim 5,
the length of the third connecting bridge in the first direction is smaller than that of the third connecting bridge in the second direction, and the length of the fourth connecting bridge in the first direction is smaller than that of the fourth connecting bridge in the second direction.
7. The pressure sensing transducer of claim 1, wherein the material of the first, second, third, and fourth connecting bridges is amorphous silicon.
8. A display panel, comprising:
a substrate including a display region and a non-display region surrounding a periphery of the display region;
the thin film transistor is positioned in the substrate display area and comprises an active layer and a metal layer;
the pressure-sensitive sensor of any one of claims 1-7, disposed on the substrate, the pressure-sensitive sensor being fabricated in the same layer as the active layer or the metal layer.
9. A display device characterized in that the display device comprises the display panel according to claim 8.
CN201711068788.XA 2017-11-03 2017-11-03 Pressure induction sensor, display panel and device CN107797706B (en)

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