CN107092397B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN107092397B CN107092397B CN201710317424.4A CN201710317424A CN107092397B CN 107092397 B CN107092397 B CN 107092397B CN 201710317424 A CN201710317424 A CN 201710317424A CN 107092397 B CN107092397 B CN 107092397B
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- base plate
- conductive film
- display panel
- touch display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- 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
Abstract
The present application relates to the field of display technologies, and in particular, to a touch display panel and a touch display device. The touch display panel comprises a first substrate with a first substrate base plate and a first conductive film layer arranged on the first substrate base plate, a second substrate with a second substrate base plate, a second conductive film layer and a plurality of first spacers, and an electric quantity detection device, wherein each first spacer is arranged on the second substrate and positioned between the first substrate and the second substrate, and a space is arranged between the surface of each first spacer facing the first substrate and the surface of the first substrate facing the second substrate, the heights of at least two first spacers in each first spacer are different, the second substrate and/or each first spacer are provided with a second conductive film layer, the first conductive film layer and the second conductive film layer can be respectively and electrically connected with the positive electrode and the negative electrode of the electric quantity detection device, in the technical scheme, the touch display panel can test the pressing force of the external touch medium.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a touch display panel and a touch display device.
Background
With the continuous development of touch display technology, touch display screens have become the mainstream in more and more electronic products (e.g., mobile phones, computers, televisions).
At present, the touch control is mainly realized by resistive touch control and capacitive touch control. Specifically, the resistive touch display screen can realize two-point touch through the contact of the upper layer and the lower layer of sensing electrodes, but the realization of multi-point touch is difficult. The capacitive touch display screen can realize multi-point touch by utilizing mutual capacitance between the transmitting electrode and the sensing electrode. However, both the resistive touch display screen and the capacitive touch display screen can only detect the touch position and cannot test the pressing force of the external touch medium.
Disclosure of Invention
The application provides a touch display panel and a touch display device, which can test the pressing force degree of an external touch medium.
The application provides a touch display panel in a first aspect, which comprises a first substrate, a second substrate and an electric quantity detection device, wherein the first substrate comprises a first substrate base plate and a first conductive film layer, the first substrate base plate is provided with the first conductive film layer,
the second substrate comprises a second substrate base plate, a second conductive film layer and a plurality of first shock insulators, the second substrate base plate and the first substrate base plate are oppositely arranged along the thickness direction of the touch display panel,
each first spacer is arranged on the second substrate and positioned between the first substrate and the second substrate, a gap is formed between the surface of each first spacer facing the first substrate and the surface of the first substrate facing the second substrate, the heights of at least two first spacers in each first spacer are different, and the direction of the height is the thickness direction,
the second substrate base plate and/or each first spacer is provided with the second conductive film layer,
one of the first conductive film layer and the second conductive film layer can be electrically connected to a positive electrode of the electric quantity detection device, and the other can be electrically connected to a negative electrode of the electric quantity detection device.
Preferably, at least one of the first substrate base plate and the second substrate base plate is made of an organic film.
Preferably, the first conductive film layer covers a surface of the first substrate base plate facing away from the second substrate base plate, and the second conductive film layer covers a surface of the second substrate base plate facing the first substrate base plate and/or each of the first spacers.
Preferably, the surface of the first substrate base plate, which is far away from the second substrate base plate, is covered with the first conductive film layer, and the surface of the second substrate base plate, which is far away from the first substrate base plate, is covered with the second conductive film layer.
Preferably, the surface of the first substrate base plate facing the second substrate base plate is covered with the first conductive film layer, and the surface of the second substrate base plate facing away from the first substrate base plate is covered with the second conductive film layer.
Preferably, the energy storage battery further comprises a rectifier, and the first conductive film layer and the second conductive film layer can be electrically connected with the energy storage battery through the rectifier.
Preferably, the touch display panel is an organic light emitting display panel, the first substrate further includes an organic light emitting layer, and the organic light emitting layer is located on a side of the first substrate, which is away from the second substrate.
Preferably, the first substrate further includes a plurality of touch electrodes, each of the touch electrodes is located on a side of the first substrate far from the second substrate, a touch electrode of each of the touch electrodes close to the edge of the first substrate is a touch electrode to be compensated, and the detected pressing force value of the touch electrode to be compensated is a compensated value.
Preferably, the touch display panel further includes a driving chip, and the driving chip is electrically connected to the electric quantity detection device and each of the touch electrodes, respectively.
Preferably, a projection surface of each first spacer on the second substrate base plate is one or more of a rectangular projection surface, a circular projection surface, an oval projection surface, an S-shaped projection surface and an arched projection surface, and the S-shaped projection surface includes a plurality of sequentially connected arc-shaped sections or a plurality of sequentially connected V-shaped sections.
Preferably, each first spacer forms at least two spacer groups, each spacer group is arranged in a row and a column, and a projection surface of each spacer group on the second substrate base plate is in one or more of a rectangle, a diamond, a circle and an ellipse.
Preferably, the second substrate further comprises a second spacer, the second spacer is located between the first substrate and the second substrate, and each of the second spacers is connected to the first substrate and the second substrate respectively,
the second spacer is arranged at the center of at least one of the spacer groups.
A second aspect of the present application provides a touch display device, which includes the touch display panel described in any one of the above.
The technical scheme provided by the application can achieve the following beneficial effects:
when one of the first substrate base plate and the second substrate base plate is pressed in the thickness direction of the touch display panel, the first substrate base plate and the second substrate base plate deform towards the direction of the other one, so that the first substrate base plate or the first conductive film layer arranged on the first substrate base plate is in compression contact with the first spacers or the second conductive film layer positioned on the first spacers, friction is generated, and when the friction occurs, electric charges can be generated between the two objects generating the friction. When the pressing force is removed, the two objects generating friction are separated from each other to form a potential difference. Wherein, when the pressing force is larger, the contact area of the two objects is larger, and therefore the potential difference formed in the separation is larger. Therefore, in the application, the positive electrode and the negative electrode of the electric quantity detection device are respectively electrically connected with the first conductive film layer and the second conductive film layer, so that the potential difference between the first conductive film layer and the second conductive film layer can be detected, the magnitude of the pressing force can be calculated by judging the magnitude of the potential difference, and the 3D pressure-sensitive touch function of the touch display panel is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Fig. 1 is a schematic top view of a touch display panel according to an embodiment of the present disclosure;
2A-2G illustrate schematic cross-sectional views of the touch display panel of FIG. 1 along the direction aa' in various implementations;
fig. 3A to fig. 3F are schematic cross-sectional views of a first spacer in a touch display device according to an embodiment of the present disclosure along a horizontal direction;
fig. 4A and 4B are schematic diagrams illustrating an arrangement of spacers in the touch display device according to the embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a distribution of touch electrodes in the touch display device according to the embodiment of the present disclosure;
fig. 6 is a partial schematic view illustrating a touch display panel provided in an embodiment of the present application;
FIG. 7 is an enlarged view of the portion C shown in FIG. 5;
fig. 8 shows a schematic structural diagram of a touch display device provided in an embodiment of the present application.
Reference numerals:
10-a touch display panel;
20-a first substrate, 201-a first substrate base, 202-a first conductive film layer,
203-organic light emitting layer, 204-touch electrode, 205-buffer layer, 206-active layer, 206 a-source conductive region, 206 b-semiconductor region, 206 c-drain conductive region, 207-gate insulating layer, 208-data line insulating layer, 209-gate, 210-source, 211-drain, 212-planarization layer, 213-anode, 214-cathode, 215-pixel definition layer, 216-encapsulation layer;
217-color film substrate, 217 a-black matrix, 217 b-color filter film, 218-array substrate, 218 a-glass layer, 218 b-light shielding layer, 218 c-polysilicon layer, 218 d-first interlayer insulating layer, 218 e-second interlayer insulating layer, 218 f-metal wiring, 218 g-passivation layer, 218 h-pixel electrode, 219-main support column, 220-auxiliary support column, 221-frame glue, 222-liquid crystal layer;
30-a second substrate, 301-a second substrate, 302-a second conductive film layer, 303-a first spacer, 304-a second spacer;
40-a charge detection device;
50-a rectifier;
60-a driving chip;
70-packaging glue.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, 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 application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application 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. Here, the character "/" in this document generally indicates that the former and latter related objects are in an "or" relationship.
In addition, the terms of orientation such as "upper", "lower", "left" and "right" described in the embodiments of the present application are described with respect to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
As shown in fig. 1, fig. 1 is a top view of a touch display panel 10 provided in an embodiment of the present application, where the touch display panel 10 has a display area a (an area shown in the shaded area in fig. 1) and a non-display area B (an area shown in the shaded area in fig. 1) surrounding the display area.
As shown in fig. 2A-2G, the touch display panel 10 includes a first substrate 20, a second substrate 30 and an electric quantity detecting device 40, the edges of the first substrate 20 and the second substrate 30 are encapsulated by an encapsulating adhesive 70, wherein the first substrate 20 and the second substrate 30 are matched with each other to generate electricity, so the structure including the first substrate 20 and the second substrate 30 can be called as an electricity generating structure, wherein the electric quantity detecting device 40 can detect the electric quantity generated by the electricity generating structure, and the structure of the three and the position relationship between the three are specifically described below:
the first substrate 20 includes a first substrate base plate 201 and a first conductive film layer 202, and the relationship between the first conductive film layer 202 and the first substrate base plate 201 is: the first substrate base plate 201 is provided with a first conductive film layer 202.
The second substrate 30 includes a second substrate base 301, a second conductive film layer 302 and a plurality of first spacers 303, the second substrate base 301 and the first substrate base 201 are disposed opposite to each other along the thickness direction of the touch display panel 10, and each first spacer 303 is disposed on the second substrate base 301 and located between the first substrate base 201 and the second substrate base 301, wherein a space is provided between a surface of each first spacer 303 facing the first substrate 20 and a surface of the first substrate 20 facing the second substrate 30, and at least two first spacers 303 in each first spacer 303 have different heights, specifically, as shown in fig. 2, four first spacers 303 having different heights may be disposed, where the direction of the height is the thickness direction of the touch display panel 10.
And the relationship between the second conductive film layer 302 and the second substrate base plate 301 and each first spacer 303 is as follows: the second substrate base plate 301 and/or each first spacer 303 is provided with a second conductive film layer 302. In addition, the relationship between the power detection device 40 and the first and second substrates 20 and 30 is: one of the first conductive film layer 202 of the first substrate 20 and the second conductive film layer 302 of the second substrate 30 can be electrically connected to a positive electrode of the power sensing device 40, and the other can be electrically connected to a negative electrode of the power sensing device 40.
In this embodiment, when one of the first substrate base plate 201 and the second substrate base plate 301 receives a pressing force in the thickness direction of the touch display panel 10, the other one of the first substrate base plate 201 and the second substrate base plate 301 deforms in the direction of the other one of the first substrate base plate 201 and the second substrate base plate 301, so that the first substrate base plate 201 or the first conductive film layer 202 arranged on the first substrate base plate 201 is in pressing contact with each first spacer 303 or the second conductive film layer 302 arranged on each first spacer 303, thereby generating friction, and when the friction occurs, an electric charge can be generated between the two objects generating the friction. When the pressing force is removed, the two objects generating friction are separated from each other to form a potential difference. Wherein, when the pressing force is larger, the contact area of the two objects is larger, and therefore the potential difference formed in the separation is larger. Therefore, in the present application, the positive electrode and the negative electrode of the electric quantity detection device 40 are electrically connected to the first conductive film layer 202 and the second conductive film layer 302 respectively, so that the potential difference between the first conductive film layer 202 and the second conductive film layer 302 can be detected, and the magnitude of the pressing force can be calculated by determining the magnitude of the potential difference, thereby implementing the 3D pressure-sensitive touch function of the touch display panel 10.
Alternatively, at least one of the first substrate base 201 and the second substrate base 301 is made of an organic film, and since the material of the organic film is very wide and the manufacturing cost per unit area is low, the manufacturing cost of the touch display panel 10 can be reduced by making at least one of the first substrate base 201 and the second substrate base 301 of an organic film. In addition, the organic film has higher flexibility than the inorganic film, and particularly, compared with an inorganic film such as a glass film or a ceramic film, the first substrate 201 and/or the second substrate 301 made of the organic film can be significantly bent or deformed when receiving a pressing force, so that the first substrate 201 or the first conductive film layer 202 provided on the first substrate 201 can be in pressing contact with each first spacer 303 or the second conductive film layer 302 provided on each first spacer 303.
Specifically, the above-mentioned organic film may be a polyimide film, an aniline formaldehyde resin film, a chestnut formaldehyde film, an ethyl cellulose film, a polyamide film, a polycyanate formaldehyde film, a polyethylene glycol succinate film, a cellulose acetate film, a polyethylene adipate film, a polydiallyl phthalate film, a fiber sponge film, a polyurethane elastomer film, a styrene propylene copolymer film, a styrene butadiene copolymer film, a rayon film, a polymethyl methacrylate film, a polyvinyl alcohol film, a polyisobutylene film, a polyethylene terephthalate film, a polyvinyl butyral film, a formaldehyde phenol polycondensate film, a chloroprene rubber film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, an acrylonitrile vinyl chloride copolymer film, or the like.
In addition, since the first substrate 201 and the second substrate 301 need to be packaged by the packaging adhesive 70, in order to reduce the packaging difficulty between the first substrate 201 and the second substrate 301, the first substrate 201 and the second substrate 301 may be made of organic films, so as to ensure that the packaging effect between the packaging member and the first substrate 201 and the second substrate 301 is substantially the same.
It should be noted that each of the first spacers 303 may also be made of the organic film, and as shown in fig. 3A to 3F, a projection surface of each of the first spacers 303 on the second substrate base plate 301 may be one or more of a rectangular projection surface, a circular projection surface, an elliptical projection surface, an S-shaped projection surface, and an arcuate projection surface, and the S-shaped projection surface includes a plurality of sequentially connected arc-shaped segments or a plurality of sequentially connected V-shaped segments. However, the projection surface of the first spacer 303 is not limited to the above shapes, and may have other shapes. The aperture ratio of the touch display panel 10 may be determined according to the specific requirements.
In an embodiment of the present application, each of the first spacers 303 mentioned above can form at least two spacer groups, each of the spacer groups is arranged in a row and column, and a projection surface of each of the spacer groups on the second substrate 301 is one or more of a rectangle, a diamond, a circle, and an ellipse, so that the design can not only ensure an aperture ratio of the touch display panel 10, but also ensure a support stability between the first substrate 20 and the second substrate 30 when the first substrate 20 is pressed.
Specifically, each first spacer 303 in the dashed line frame in fig. 4A forms a rectangular spacer group, and each first spacer 303 in the dashed line frame in fig. 4B forms a diamond-shaped spacer group, and it should be noted that at least one first spacer 303 may be shared by two adjacent spacer groups.
Preferably, the second base plate 30 further includes second spacers 304, the second spacers 304 are located between the first base plate 201 and the second base plate 301, and each of the second spacers 304 is in contact with the first base plate 201 and the second base plate 301, in other words, the first base plate 20 is supported on the second base plate 30 by the second spacers 304 to ensure the support stability between the first base plate 20 and the second base plate 30.
Wherein, at least one of each spacer group is provided with a second spacer 304 at the center, preferably, as shown in fig. 4A and 4B, the second spacer 304 is provided at the center of each spacer group, so that the supporting stability and uniformity between the first substrate 20 and the second substrate 30 can be ensured.
The following will specifically describe the arrangement relationship between the first conductive film layer 202 and the first substrate base plate 201, and the second conductive film layer 302 and the second substrate base plate 301 and each first spacer 303:
in the first preferred embodiment, the surface of the first substrate base plate 201 facing away from the second substrate base plate 301 is covered with the first conductive film layer 202, and the surface of the second substrate base plate 301 facing toward the first substrate base plate 201 and/or each first spacer 303 is covered with the second conductive film layer 302. Specifically, there are three implementation schemes in this embodiment:
in a first implementation, as shown in fig. 2A, a surface of the first substrate base plate 201 facing away from the second substrate base plate 301 is covered with a first conductive film layer 202, and a surface of the second substrate base plate 301 facing toward the first substrate base plate 201 is covered with a second conductive film layer 302. When one of the first substrate 201 and the second substrate 301 is pressed in the thickness direction of the touch display panel 10, the other is deformed in the direction of the other, so that the first substrate 201 can be in pressing contact with at least a part of the first spacer 303 and generate friction, and the first substrate 201 and the first spacer 303 can respectively carry equal amounts of opposite charges. When the pressing force is removed, the first substrate 201 and the first spacer 303 are separated from each other to form a potential difference, and then the magnitude of the pressing force can be calculated from the potential difference detected by the electric quantity detection device 40.
In this embodiment, in order to ensure that the first substrate 201 and the first spacer 303 can carry the same amount of opposite charges after rubbing, the first substrate 201 and each first spacer 303 need to be made of different organic films.
In a second implementation, as shown in fig. 2B, the surface of the first substrate base plate 201 facing away from the second substrate base plate 301 is covered with the first conductive film layer 202, and the surface of the second substrate base plate 301 facing the first substrate base plate 201 and each of the first spacers 303 is covered with the second conductive film layer 302.
In addition, in a third implementation scheme, a first conductive film layer covers the surface of the first substrate base plate, which is far away from the second substrate base plate, and a second conductive film layer covers each first spacer.
In the second and third implementations, when one of the first substrate base plate 201 and the second substrate base plate 301 is subjected to a pressing force in the thickness direction of the touch display panel 10, it is deformed toward the other one, so that the first substrate base plate 201 can be in pressing contact with at least a part of the second conductive film layer 302 on the first spacer 303 and generate friction, and thus the first substrate base plate 201 and the second conductive film layer 302 can respectively carry equal amounts of opposite charges. When the pressing force is removed, the first substrate base plate 201 and the second conductive film layer 302 are separated from each other to form a potential difference, and then the magnitude of the pressing force can be calculated through the potential difference detected by the electric quantity detection device 40.
In a second preferred embodiment, as shown in fig. 2C, a surface of the first substrate base plate 201 facing away from the second substrate base plate 301 is covered with the first conductive film layer 202, and a surface of the second substrate base plate 301 facing away from the first substrate base plate 201 is covered with the second conductive film layer 302. When one of the first substrate 201 and the second substrate 301 is pressed in the thickness direction of the touch display panel 10, the other is deformed in the direction of the other, so that the first substrate 201 can be in pressing contact with at least a part of the first spacer 303 and generate friction, and the first substrate 201 and the first spacer 303 can respectively carry equal amounts of opposite charges. When the pressing force is removed, the first substrate 201 and the first spacer 303 are separated from each other to form a potential difference, and then the magnitude of the pressing force can be calculated from the potential difference detected by the electric quantity detection device 40.
In this embodiment, in order to ensure that the first substrate 201 and the first spacer 303 can carry the same amount of opposite charges after rubbing, the first substrate 201 and each first spacer 303 need to be made of different organic films.
In a third preferred embodiment, as shown in fig. 2D, a surface of the first substrate base plate 201 facing the second substrate base plate 301 is covered with the first conductive film layer 202, and a surface of the second substrate base plate 301 facing away from the first substrate base plate 201 is covered with the second conductive film layer 302. When one of the first substrate base plate 201 and the second substrate base plate 301 is pressed in the thickness direction of the touch display panel 10, the other substrate base plate deforms in the direction of the other substrate base plate, so that the first conductive film layer 202 can be in pressing contact with at least a part of the first spacer 303 and generate friction, and the first conductive film layer 202 and the first spacer 303 can respectively carry equal amounts of opposite charges. When the pressing force is removed, the first conductive film layer 202 and the first spacer 303 are separated from each other to form a potential difference, and then the magnitude of the pressing force can be calculated through the potential difference detected by the electric quantity detection device 40.
In an embodiment of the application, as shown in fig. 2E, the touch display panel 10 may further include a rectifier 50, the first conductive film layer 202 and the second conductive film layer 302 can be electrically connected to the energy storage battery through the rectifier 50, and the rectifier 50 can process the current between the first conductive film layer 202 and the second conductive film layer 302 and then can deliver the processed current to the energy storage battery to charge the energy storage battery. The energy storage battery can supply power for the power utilization element in the touch display device, and the self-generating function of the touch display device is achieved.
In an embodiment of the present application, as shown in fig. 2F, the touch display panel 10 is an organic light emitting display panel. Specifically, the first substrate 20 further includes an organic light emitting layer 203, and the organic light emitting layer 203 is located on a side of the first substrate 201 away from the second substrate 301 and is located in the display area a. The first substrate 20 further includes a buffer layer 205, an active layer 206, a gate insulating layer 207, a data line insulating layer 208, a gate 209, a source 210, a drain 211, a planarization layer 212, an anode 213, a cathode 214, a pixel defining layer 215, and an encapsulation layer 216. The buffer layer 205 is formed on the first substrate 201 at a side away from the second substrate 301, the active layer 206 is formed on the buffer layer 205, the active layer 206 includes a source conductive region 206a, a semiconductor region 206b and a drain conductive region 206c connected in sequence, the semiconductor region 206b is made of polysilicon, and the buffer layer 205 is formed on the first substrate 201 to prevent the active layer 206 from directly contacting the first substrate 201 to deteriorate characteristics. The gate insulating layer 207 covers the active layer 206 and the buffer layer 205, and the gate electrode 209 is formed on the gate insulating layer 207. The data line insulating layer 208 covers the gate 209 and the gate insulating layer 207, the source 210 and the drain 211 are located on the data line insulating layer 208, and the source 210 and the drain 211 respectively pass through the data line insulating layer 208 and the via hole on the gate insulating layer 207 and are respectively connected to the source conductive region 206a and the drain conductive region 206c on the active layer 206. The planarization layer 212 covers the source electrode 210, the drain electrode 211 and the data line insulating layer 208, and the anode 213 is formed on the planarization layer 212, and the anode 213 is electrically connected to the drain electrode 211 through a via hole on the planarization layer 212. The pixel defining layer 215 covers the planarization layer 212 and the anode 213, wherein the pixel defining layer 215 is provided with an opening area opposite to the anode 213, the aforementioned organic light emitting layer 203 is located in the opening area and contacts the anode 213, and the cathode 214 covers the planarization layer 212 and contacts the organic light emitting layer 203 located in the opening area, and the cathode 214 and the anode 213 drive the organic light emitting layer 203 together. The encapsulation layer 216 covers the cathode 214 on a side away from the organic light emitting layer 203, and can protect the organic light emitting layer 203 and the cathode 214 from encapsulation and water and oxygen, so that the service life of the organic light emitting layer 203 and the cathode 214 is prolonged.
Preferably, as shown in fig. 2G, the first substrate 20 may further include a plurality of touch electrodes 204, and each touch electrode 204 is located on a side of the first substrate 201 away from the second substrate 301, and in particular, may be formed on a side of the encapsulation layer 216 away from the cathode 214.
Next, fig. 5 shows a touch electrode distribution diagram in fig. 2G.
In the direction perpendicular to the first substrate, as shown in fig. 5, the touch electrodes 204 are multiplexed as common electrodes and arranged in an M × N array, where M is a positive integer greater than or equal to 2, N is a positive integer greater than or equal to 2, and the block-shaped common electrodes are preferably rectangular. Each block-shaped common electrode can correspondingly cover i x j sub-pixel regions, wherein i >2, j >2, and i and j are natural numbers. Since each common electrode needs to form an electric field with the pixel electrode in the display stage, each common electrode needs to cover the opening region of each sub-pixel, that is, the slit formed between two adjacent common electrodes can overlap with the data line in the direction perpendicular to the plane of the array substrate.
Each common electrode is connected to the driving chip through a touch line, and in the display stage, the driving chip inputs a common electrode signal to each common electrode so as to form an electric field with each pixel electrode. In the touch control stage, the driving chip inputs touch control signals to each common electrode simultaneously or in a time-sharing manner, and the touch control position is detected by detecting the self-capacitance change of each common electrode, namely the touch control electrode. Because each common electrode is arranged in a matrix and is connected to the driving chip through the corresponding touch control routing, the self-capacitance change on each common electrode can be detected simultaneously, and the multi-point touch control detection is realized.
When the touch electrode 204 located at the edge and the touch electrode 204 located in the middle receive the same pressing force, the deformation generated at the edge of the first substrate 201 is smaller than the deformation generated at the middle, so that the friction area when the edge receives a force is smaller than the friction area when the middle receives a force, and the detection of the pressing force is inaccurate.
To solve this problem, with reference to fig. 2G and 5, the scheme adopts the following manner: the touch electrode 204 of each touch electrode 204 near the edge of the first substrate 201 is designed as a touch electrode 204 to be compensated, and the pressing force value of the touch electrode 204 to be compensated detected by the electric quantity detection device 40 is a compensated value. Specifically, the pressing force values of the touch electrodes 204 to be compensated detected by the electric quantity detection device 40 are compensated by the driving chip 60, that is, the touch display panel 10 further includes the driving chip 60, and the driving chip 60 is electrically connected to the electric quantity detection device 40 and each touch electrode 204 respectively.
Of course, fig. 5 only schematically shows the structure of the touch electrode distribution, and in an actual product, the number of touch electrode distributions is very large, and the principle is the same as that described in fig. 5.
In another embodiment of the present application, as shown in fig. 6, the touch display panel 10 is a liquid crystal display panel. Specifically, the first substrate further includes a color filter substrate 217, a main support column 219, an auxiliary support column 220, a liquid crystal layer 222, and an array substrate 218, the color filter substrate 217 and the array substrate 218 are oppositely disposed along a thickness direction of the first substrate 20, edges of the color filter substrate 217 and the array substrate 218 are encapsulated by a sealant 221, and the liquid crystal layer 222 is located between the color filter substrate 217 and the array substrate 218. The main supporting column 219 and the auxiliary supporting column 220 are also disposed between the color film substrate 217 and the array substrate 218, the main supporting column 219 and the auxiliary supporting column 220 are both disposed on the color film substrate 217, the main supporting column 219 abuts against the array substrate 218, and a gap is formed between the auxiliary supporting column 220 and the array substrate 218. It should be noted that the array substrate 218 is located between the color filter substrate 217 and the first substrate 201, and the array substrate 218 is formed on a side of the first substrate 201 away from the second substrate 301.
As shown in fig. 7, the color filter substrate 217 includes a plurality of black matrixes 217a arranged at intervals and a color filter 217b located between two adjacent black matrixes 217 a. The array substrate 218 further includes a glass layer 218a, a light-shielding layer 218b, a polysilicon layer 218c, a buffer layer 205, a first interlayer insulating layer 218d, a second interlayer insulating layer 218e, a gate 209, a source 210, a drain 211, a planarization layer 212, a metal trace 218f, a pixel electrode 218h, a touch electrode 204, and a passivation layer 218 g.
Specifically, a glass layer 218a is formed on the first substrate 201 on the side away from the second substrate 301, a light-shielding layer 218b is formed on the glass layer 218a, and a buffer layer 205 covers the light-shielding layer 218b and the glass layer 218 a. The polysilicon layer 218c is formed on the buffer layer 205, and the first interlayer insulating layer 218d covers the polysilicon layer 218c and the buffer layer 205. The gate 209 is disposed above the polysilicon layer 218c and spaced apart from the polysilicon layer 218c, and it should be noted that the gate 209 is also covered by the first interlayer insulating layer 218d, the source 210 and the drain 211 are disposed on the first interlayer insulating layer 218d, and the source 210 and the drain 211 are electrically connected to the polysilicon layer 218c through vias on the first interlayer insulating layer 218d, respectively. And the planarization layer 212 covers the source 210, the drain 211 and the first interlayer insulating layer 218 d. The metal trace 218f is formed on the planarization layer 212 and covered by the second interlayer insulating layer 218e, the touch electrode 204 is formed on the second interlayer insulating layer 218e, the metal trace 218f can be used as a touch line and electrically connected to the touch electrode 204 through a via hole, the touch electrode 204 can be used as a common electrode during displaying, and forms an electric field with the pixel electrode to drive liquid crystal molecules in the liquid crystal layer 222 to rotate, thereby achieving a display function. A passivation layer 218g covers the touch electrode 204 and the second interlayer insulating layer 218e, a pixel electrode 218h is formed on the passivation layer 218g, and a portion of the pixel electrode 218h passes through the second interlayer insulating layer 218e and is electrically connected to the drain electrode 211 through a via hole in the planarization layer 212.
It should be noted that the distribution diagram of the touch electrodes in the lcd panel can also be shown in fig. 5.
As shown in fig. 8, fig. 8 is a schematic view of a touch display device provided in an embodiment of the present application, which includes the touch display panel 10, wherein the specific structure and principle of the touch display panel 10 are the same as those of the embodiment, and are not repeated herein.
The touch display device according to the embodiment of the present invention may include, but is not limited to, any electronic device with a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, an MP4 player, or a television.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A touch display panel is characterized by comprising a first substrate, a second substrate and an electric quantity detection device, wherein the first substrate comprises a first substrate base plate and a first conductive film layer, the first substrate base plate is provided with the first conductive film layer,
the second substrate comprises a second substrate base plate, a second conductive film layer and a plurality of first shock insulators, the second substrate base plate and the first substrate base plate are oppositely arranged along the thickness direction of the touch display panel,
each first spacer is arranged on the second substrate and positioned between the first substrate and the second substrate, a gap is formed between the surface of each first spacer facing the first substrate and the surface of the first substrate facing the second substrate, the heights of at least two first spacers in each first spacer are different, and the direction of the height is the thickness direction,
the second substrate base plate and/or each first spacer is provided with the second conductive film layer,
one of the first conductive film layer and the second conductive film layer can be electrically connected with a positive electrode of the electric quantity detection device, and the other one can be electrically connected with a negative electrode of the electric quantity detection device;
the electric quantity detection device is used for detecting the potential difference between the first conductive film layer and the second conductive film layer, and calculating the magnitude of pressing force in the thickness direction of the touch display panel by judging the magnitude of the potential difference, wherein when one of the first substrate and the second substrate is pressed in the thickness direction of the touch display panel, one of the first substrate and the second substrate is deformed towards the direction of the other one, so that the first substrate or the first conductive film layer arranged on the first substrate is pressed and contacted with each first spacer or the second conductive film layer positioned on each first spacer, friction is generated, electric charges are generated between the two objects generating friction, and when the pressing force is removed, the two objects generating friction are separated from each other to form the potential difference, and the larger the pressing force is, the larger the contact area of the two objects generating friction is, and the larger the potential difference is formed in separation;
the touch display panel is an organic light-emitting display panel, and the first substrate further comprises a buffer layer, an active layer, a gate insulating layer, a data line insulating layer, a gate, a source electrode, a drain electrode, a flat layer, an anode, an organic light-emitting layer, a cathode, a pixel defining layer and a packaging layer, wherein the buffer layer, the active layer, the gate insulating layer, the data line insulating layer, the gate, the source electrode, the drain electrode, the flat layer, the anode, the organic light-emitting layer;
alternatively, the first and second electrodes may be,
the touch display panel is a liquid crystal display panel, and the first substrate further comprises a color film substrate, a main support column, an auxiliary support column, a liquid crystal layer and an array substrate, wherein the color film substrate is positioned on one side of the first substrate, which is far away from the second substrate.
2. The touch display panel of claim 1,
at least one of the first substrate base plate and the second substrate base plate is made of an organic film.
3. The touch display panel of claim 1,
the first conductive film layer covers the surface of the first substrate base plate, which is far away from the second substrate base plate, and the second conductive film layer covers the surface of the second substrate base plate, which faces the first substrate base plate, and/or each first spacer.
4. The touch display panel of claim 1,
the surface of the first substrate base plate, which deviates from the second substrate base plate, is covered with the first conductive film layer, and the surface of the second substrate base plate, which deviates from the first substrate base plate, is covered with the second conductive film layer.
5. The touch display panel of claim 1,
the surface of the first substrate base plate facing the second substrate base plate is covered with the first conductive film layer, and the surface of the second substrate base plate facing away from the first substrate base plate is covered with the second conductive film layer.
6. The touch display panel of claim 1, further comprising a rectifier, wherein the first conductive film layer and the second conductive film layer can be electrically connected to an energy storage battery through the rectifier.
7. The touch display panel of claim 1,
the first substrate further comprises a plurality of touch electrodes, each touch electrode is located on one side, far away from the second substrate, of the first substrate, the touch electrode, close to the edge of the first substrate, of each touch electrode is a touch electrode to be compensated, and the detected pressing force value of the touch electrode to be compensated is a compensated value.
8. The touch display panel of claim 7,
the touch display panel further comprises a driving chip, and the driving chip is electrically connected with the electric quantity detection device and each touch electrode respectively.
9. The touch display panel according to claim 1, wherein a projection surface of each of the first spacers on the second substrate is one or more of a rectangular projection surface, a circular projection surface, an elliptical projection surface, an S-shaped projection surface, and an arcuate projection surface, and the S-shaped projection surface includes a plurality of sequentially connected arc segments or a plurality of sequentially connected V-shaped segments.
10. The touch display panel according to claim 1, wherein each of the first spacers forms at least two spacer groups, each of the spacer groups is arranged in a row-column manner, and a projection surface of each of the spacer groups on the second substrate base plate is in one or more of a rectangular shape, a diamond shape, a circular shape, and an oval shape.
11. The touch display panel according to claim 10, wherein the second substrate further comprises a second spacer, the second spacer is located between the first substrate and the second substrate, and each of the second spacers is connected to the first substrate and the second substrate,
the second spacer is arranged at the center of at least one of the spacer groups.
12. A touch display device comprising the touch display panel according to any one of claims 1 to 11.
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| CN108336121B (en) * | 2018-03-30 | 2021-02-09 | 京东方科技集团股份有限公司 | OLED pressure touch display device and manufacturing method thereof |
| CN109739382B (en) * | 2019-01-04 | 2022-12-20 | 京东方科技集团股份有限公司 | Touch device and display equipment |
| CN110045867B (en) * | 2019-03-25 | 2020-10-27 | 深圳市华星光电半导体显示技术有限公司 | Touch display panel and touch display device |
| CN110286790B (en) * | 2019-06-21 | 2021-11-12 | 京东方科技集团股份有限公司 | Touch panel and display device |
| CN110597421B (en) * | 2019-09-29 | 2022-12-06 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN111026290B (en) * | 2019-12-04 | 2023-07-14 | 霸州市云谷电子科技有限公司 | Display device and display terminal |
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