CN106681561B - Touch panel, manufacturing method thereof and touch display device - Google Patents
Touch panel, manufacturing method thereof and touch display device Download PDFInfo
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- CN106681561B CN106681561B CN201710002547.9A CN201710002547A CN106681561B CN 106681561 B CN106681561 B CN 106681561B CN 201710002547 A CN201710002547 A CN 201710002547A CN 106681561 B CN106681561 B CN 106681561B
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
Abstract
The invention discloses a touch panel, a manufacturing method thereof and a touch display device, and belongs to the field of display. The method comprises the following steps: a substrate base plate; a touch sensing electrode pattern and a touch driving electrode pattern which are insulated from each other are arranged on the substrate base plate; the touch sensing electrode pattern comprises a plurality of touch sensing electrodes arranged in an array; the touch driving electrode pattern comprises a plurality of touch driving electrodes arranged in an array, and any touch sensing electrode and any touch driving electrode are arranged in a crossed manner; the touch driving electrode is a transparent strip-shaped touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode; or the touch drive electrode is a transparent strip-shaped touch drive electrode, and the touch sensing electrode is a strip-shaped grid-type touch sensing electrode; or, the touch driving electrode is a strip grid type touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode. The invention effectively optimizes the display performance of the touch display device.
Description
Technical Field
The invention relates to the field of display, in particular to a touch panel, a manufacturing method thereof and a touch display device.
Background
With the development of science and technology, the use of touch display devices has become more and more widespread. The touch panel on the touch display device is provided with a plurality of touch driving electrodes Tx and a plurality of touch sensing electrodes Rx, the touch driving electrodes Tx can send out low-voltage high-frequency signals, and the touch sensing electrodes Rx receive the low-voltage high-frequency signals, so that a stable capacitance is formed between the touch driving electrodes Tx and the touch sensing electrodes Rx. The touch of the user may cause different capacitance changes between the touch driving electrode Tx and the touch sensing electrode Rx, thereby implementing a corresponding touch operation.
In the existing touch panel, both the touch driving electrodes Tx and the touch sensing electrodes Rx are made of metal and are in a grid shape, and the metal grids corresponding to the touch driving electrodes Tx and the metal grids corresponding to the touch sensing electrodes Rx are arranged in layers in the touch panel to form a double-layer metal grid structure.
Due to the high distribution density of the metal mesh disposed in the entire layer, Light emitted by a Light Emitting Diode (LED) inside the touch display device is partially blocked by the metal mesh, and the transmittance of the Light is reduced, so that the display brightness of the touch display device is affected to a certain extent. Therefore, the display performance of the conventional touch display device is poor.
Disclosure of Invention
In order to solve the problem of poor display performance of the conventional touch display device, embodiments of the present invention provide a touch panel, a manufacturing method thereof, and a touch display device. The technical scheme is as follows:
in a first aspect, a touch panel is provided, including:
a substrate base plate;
a touch sensing electrode pattern and a touch driving electrode pattern which are insulated from each other are arranged on the substrate base plate;
the touch sensing electrode pattern comprises a plurality of touch sensing electrodes arranged in an array, and is made of metal;
the touch driving electrode pattern comprises a plurality of touch driving electrodes arranged in an array, and any touch sensing electrode and any touch driving electrode are arranged in a crossed manner;
the touch driving electrode is a transparent strip-shaped touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode;
or the touch drive electrode is a transparent strip-shaped touch drive electrode, and the touch sensing electrode is a strip-shaped grid-type touch sensing electrode;
or, the touch driving electrode is a strip grid type touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode.
Optionally, when the touch sensing electrode is a linear touch sensing electrode, the linear touch sensing electrode is a broken line type, or the linear touch sensing electrode is a wavy line type; when the touch sensing electrode is a strip-shaped grid type touch sensing electrode, the strip-shaped grid type touch sensing electrode is in a zigzag shape, or the strip-shaped grid type touch sensing electrode is in a wavy line shape.
Optionally, the touch driving electrodes are transparent strip-shaped touch driving electrodes, and the touch driving electrode patterns are made of indium tin oxide.
Optionally, the transparent strip-shaped touch driving electrode is in a zigzag shape; or the transparent strip-shaped touch control driving electrode is in a wavy line shape; or the edge of the transparent strip-shaped touch control driving electrode is in a zigzag shape or a wavy shape.
Optionally, the touch driving electrodes are strip-shaped grid-type touch driving electrodes, and the touch driving electrode patterns are made of metal.
Optionally, the thickness h of the insulating layer between the touch sensing electrode pattern and the touch driving electrode pattern and the number n of the touch sensing electrodes in the touch sensing electrode pattern satisfy a mutual capacitance condition, where the mutual capacitance condition is:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
and C is a mutual capacitance value between the touch sensing electrode pattern and the touch driving electrode pattern.
Optionally, the length direction of any one of the touch sensing electrodes is perpendicular to the length direction of any one of the strip touch driving electrodes.
Optionally, an annular black matrix is arranged on the substrate base plate, and a region surrounded by the annular black matrix is a visible region;
the touch sensing electrode pattern is arranged on the black matrix layer;
an insulating layer is arranged on the touch sensing electrode pattern;
the insulating layer is provided with the touch drive electrode pattern;
and an insulating protective layer is arranged on the touch drive electrode pattern.
In a second aspect, a method for manufacturing a touch panel is provided, including:
forming a touch sensing electrode pattern and a touch driving electrode pattern which are insulated from each other on a substrate;
the touch sensing electrode pattern comprises a plurality of touch sensing electrodes arranged in an array, and is made of metal;
the touch driving electrode pattern comprises a plurality of touch driving electrodes arranged in an array, and any touch sensing electrode and any touch driving electrode are arranged in a crossed manner;
the touch driving electrode is a transparent strip-shaped touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode;
or the touch drive electrode is a transparent strip-shaped touch drive electrode, and the touch sensing electrode is a strip-shaped grid-type touch sensing electrode;
or, the touch driving electrode is a strip grid type touch driving electrode, and the touch sensing electrode is a linear touch sensing electrode.
Optionally, when the touch sensing electrode is a linear touch sensing electrode, the linear touch sensing electrode is a broken line type, or the linear touch sensing electrode is a wavy line type; when the touch sensing electrode is a strip-shaped grid type touch sensing electrode, the strip-shaped grid type touch sensing electrode is in a zigzag shape, or the strip-shaped grid type touch sensing electrode is in a wavy line shape.
Optionally, the touch driving electrodes are transparent strip-shaped touch driving electrodes, and the touch driving electrode patterns are made of indium tin oxide.
Optionally, the transparent strip-shaped touch driving electrode is in a zigzag shape; or the transparent strip-shaped touch control driving electrode is in a wavy line shape; or the edge of the transparent strip-shaped touch control driving electrode is in a zigzag shape or a wavy shape.
Optionally, the forming a touch sensing electrode pattern and a touch driving electrode pattern insulated from each other on the substrate includes:
forming a touch sensing electrode pattern on the substrate base plate;
forming an insulating layer on the touch sensing electrode pattern;
forming a touch drive electrode pattern on the insulating layer;
the thickness h of the insulating layer between the touch sensing electrode pattern and the touch driving electrode pattern and the number n of the touch sensing electrodes in the touch sensing electrode pattern meet a mutual capacitance condition, wherein the mutual capacitance condition is as follows:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
and C is a mutual capacitance value between the touch sensing electrode pattern and the touch driving electrode pattern.
Optionally, before the touch sensing electrode patterns and the touch driving electrode patterns which are insulated from each other are formed on the substrate, the method further includes:
forming an annular black matrix on the substrate, wherein a region surrounded by the annular black matrix is a visible region;
after forming a touch drive electrode pattern on the insulating layer, the method further includes:
and forming an insulating protection layer on the touch drive electrode pattern.
In a third aspect, a touch display device is provided, which includes: the touch panel of any of the first aspect.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
in the touch panel, the manufacturing method thereof and the touch display device provided by the embodiment of the invention, Tx in the touch panel can be transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; or, Tx is a strip grid Tx, and Rx is a linear Rx, compared with a metal grid arranged in a whole layer in the prior art, the area of metal is reduced, the density of the metal grid is correspondingly reduced, the transmittance of light is further improved, and the influence of the light on the display brightness is weakened, so that the display performance of the touch display device is effectively optimized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1-1 is a schematic structural diagram of a touch panel according to an embodiment of the present invention;
fig. 1-2 are schematic top view diagrams of a touch panel in the prior art, wherein Tx and Rx are both metal meshes;
fig. 1-3 are schematic top view structures of a touch panel according to an embodiment of the present invention, wherein Tx is a transparent strip Tx and Rx is a linear Rx;
fig. 1-4 are schematic top view structures of another touch panel according to an embodiment of the invention, in which Tx is a transparent strip Tx and Rx is a strip grid Rx;
fig. 1-5 are schematic top view structures of another touch panel according to an embodiment of the present invention, wherein Tx is a stripe Tx and Rx is a linear Rx;
FIG. 2-1 is a schematic view of a strip-shaped lattice Rx in a zigzag shape according to an embodiment of the present invention;
fig. 2-2 is a schematic view of a strip-shaped lattice Rx in a wavy line shape according to an embodiment of the present invention;
fig. 3-1 is a schematic view illustrating a shape of a transparent strip Tx in a zigzag shape according to an embodiment of the present invention;
fig. 3-2 is a schematic diagram illustrating a shape of a transparent strip Tx in a wavy line shape according to an embodiment of the present invention;
fig. 3-3 is a schematic view illustrating a shape of an edge of a transparent strip Tx being a broken line according to an embodiment of the present invention;
fig. 3-4 are schematic diagrams illustrating a shape of an edge of a transparent strip Tx being wavy;
fig. 4-1 is a schematic structural diagram of another touch panel according to an embodiment of the invention;
fig. 4-2 is a schematic view illustrating an annular black matrix disposed on a substrate, the annular black matrix enclosing an area that is a visible area according to an embodiment of the present invention;
FIGS. 4-3 are schematic diagrams of the connection of Tx and Rx to an integrated circuit via a pad region, respectively, according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for manufacturing a touch panel according to an embodiment of the invention;
fig. 6 is a flowchart of forming Rx patterns and Tx patterns insulated from each other on a substrate on which an annular black matrix is formed according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1-1 is a schematic structural diagram of a touch panel 00 according to an embodiment of the present invention, as shown in fig. 1-1, the touch panel 00 includes:
the base substrate 001.
On the base substrate 001, an Rx pattern 002 and a Tx pattern 003 are provided, which are insulated from each other.
The Rx pattern 002 includes a plurality of Rx patterns arranged in an array, and the Rx pattern 002 is made of metal, for example, the Rx pattern may be made of metal Mo (Chinese: molybdenum), metal Cu (Chinese: copper), metal Al (Chinese: aluminum) or alloy material thereof.
The Tx pattern 003 includes a plurality of Tx arranged in an array, and any Rx is arranged to cross any Tx. Alternatively, the length of any Rx strip may be perpendicular to the length of any Tx strip.
Wherein Tx is transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; alternatively, Tx is a stripe lattice type Tx, and Rx is a linear Rx. When the Tx is a transparent strip Tx, the Tx pattern can be made of Indium Tin Oxide (ITO); when Tx is a stripe grid type Tx, the Tx pattern may be made of metal, for example: the Tx pattern may be made of metal Mo, metal Cu, metal Al, or an alloy material thereof.
When using the touch panel, a user can perform a touch operation on the surface of the substrate 001 away from the Rx pattern 002 to implement a corresponding touch function.
In summary, in the touch panel provided in the embodiments of the present invention, Tx in the touch panel may be transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; or, Tx is a strip grid Tx, and Rx is a linear Rx, compared with a metal grid arranged in a whole layer in the prior art, the area of metal is reduced, the density of the metal grid is correspondingly reduced, the transmittance of light is further improved, and the influence of the light on the display brightness is weakened, so that the display performance of the touch display device is effectively optimized.
Fig. 1-2 are schematic top view diagrams of a touch panel in the prior art, wherein Tx and Rx are both metal meshes. Fig. 1-3 are schematic top view structures of a touch panel according to an embodiment of the present invention, wherein Tx is a transparent strip Tx and Rx is a linear Rx. Fig. 1-4 are schematic top view structures of another touch panel according to an embodiment of the invention, in which Tx is a transparent strip Tx and Rx is a strip grid Rx. Fig. 1-5 are schematic top view structures of another touch panel according to an embodiment of the present invention, wherein Tx is a stripe Tx and Rx is a linear Rx.
As can be seen in fig. 1-2 through 1-5: tx is transparent strip Tx and Rx is linear Rx, Tx is transparent strip Tx and Rx is strip grid Rx, and Tx is strip grid Tx and Rx is linear Rx, the density of the metal grid is reduced to some extent compared to the prior art, and when Tx is transparent strip Tx and Rx is linear Rx, since transparent strip Tx is made of ITO and linear Rx is made of metal, but linear Rx does not form the metal grid, the density of the metal grid in the structure is 0, it can be seen that the reduction of the density of the metal grid is the greatest in the structure in which Tx is transparent strip Tx and Rx is linear Rx.
When signals with different frequencies are superimposed, the superimposed signals are shifted in the overlapping position due to the difference in frequency between the signals, and moire fringes are generated due to the shift in the overlapping position, and appear as high-frequency color fringes in an image, which is a disturbance to the image. In the touch panel, the higher the density of the metal grid is, the higher the probability of generating moire fringes is. The Rx and Tx structures provided by the embodiment of the invention can reduce the density of the metal mesh, so that the structure can improve the light transmittance and reduce the generation probability of moire fringes, thereby reducing the interference of moire fringes on image display, and further optimizing the display performance of the touch display device to a certain extent.
It should be noted that, the structure in which Tx is transparent stripe Tx can also effectively shield signal interference generated by an integrated circuit or other circuits in a display panel in the touch display device on the touch panel.
It should be noted that the linear Rx, the strip-grid Rx, the transparent strip Tx, and the strip-grid Tx may also be in various shapes, and Rx may be a linear Rx or a rectangular strip-grid Rx; the Tx may be a rectangular transparent stripe Tx or a rectangular stripe lattice Tx.
It should be noted that, when there is a certain bend in the length direction of Rx and/or Tx, the frequency difference of the signals can be reduced to some extent, so that the probability of moire generation can be further reduced on the basis of reducing the metal mesh density, and thus the interference of moire on the image display can be reduced.
Thus, in practical applications, when Rx is linear Rx, the linear Rx may preferably be a zigzag line or a wavy line; when Rx is a bar lattice type Rx, the bar lattice type Rx may preferably be a zigzag line, or a wavy line. For example, when the bar-shaped lattice Rx is in a zigzag shape, the schematic shape thereof can be as shown in fig. 2-1; when the strip-shaped lattice type Rx is in a wavy line shape, the schematic shape thereof can be shown in fig. 2-2. The transparent stripe Tx may preferably have a zigzag or wavy line shape, or the edge of the transparent stripe Tx may preferably have a zigzag or wavy line shape. For example, when the transparent stripe Tx is in a zigzag shape, the schematic shape thereof can be as shown in fig. 3-1; when the transparent strip Tx is wavy, the shape thereof can be schematically shown in fig. 3-2; when the edge of the transparent strip Tx is a zigzag shape, the schematic shape thereof can be as shown in fig. 3-3; when the edge of the transparent strip Tx is wavy, the shape thereof can be schematically shown in fig. 3-4. The stripe lattice type Tx may also preferably be in a zigzag or wavy line shape, and a schematic view of the corresponding shape thereof may refer to fig. 2-1 and 2-2.
In the touch panel, no matter what shape the Tx and Rx are in, the mutual capacitance value between the corresponding Tx pattern and Rx pattern needs to satisfy a certain mutual capacitance condition, and only when the mutual capacitance condition is satisfied, the integrated circuit can drive the Tx, and accordingly, can generate a corresponding touch operation when touched by a user. In the embodiment of the present invention, the mutual capacitance condition that the thickness h of the insulating layer between the Rx pattern and the Tx pattern and the number n of Rx in the Rx pattern need to satisfy is as follows:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
where C is the mutual capacitance between the Rx pattern and the Tx pattern.
Optionally, the size of the mutual capacitance value between Tx and Rx is mainly determined by the size of the overlapping area between Tx and Rx, and the size of the overlapping area and the size of the mutual capacitance value are in a positive correlation relationship. In the embodiment of the present invention, the Rx and Tx structures are changed from the prior art to reduce the overlapping area between Tx and Rx, so that some measures are required to adjust the mutual capacitance value to satisfy the mutual capacitance condition. Alternatively, the method of adjusting the mutual capacitance value may be a method of reducing the thickness of an insulating layer between the Rx pattern and the Tx pattern and adjusting the number of Rx in the Rx pattern. For example, when Rx in the touch panel is linear Rx and Tx is transparent stripe Tx, and the method for adjusting the number of Rx in the Rx pattern is used, one adjusted transparent stripe Tx may correspond to 2 to 3 linear Rx, that is, the above-mentioned mutual capacitance condition is satisfied, that is, the mutual capacitance value C between the Rx pattern and the Tx pattern satisfies: c is more than or equal to 0.3 picofarad and less than or equal to 3 picofarads.
In practical applications, the mutual capacitance value is usually adjusted by a method of multiple experiments, for example, a designed touch panel structure may be input into corresponding software (e.g., Ansoft Q3D software) to obtain the mutual capacitance value of the structure, and when the obtained mutual capacitance value does not satisfy a condition, the structure of the touch panel is adjusted, that is, the overlapping area between Tx and Rx is adjusted until the mutual capacitance value satisfies the condition. In practical application, there may be other adjustment methods, and the embodiment of the present invention is not limited thereto.
Optionally, fig. 4-1 is a schematic structural diagram of another touch panel 00 according to an embodiment of the present invention, and as shown in fig. 4-1, the touch panel 00 may include:
the base substrate 001.
An annular black matrix 004 is arranged on the substrate 001, and a region surrounded by the annular black matrix 004 is a visible region. The annular black matrix 004 can be used to block light.
An Rx pattern 002 is disposed on the black matrix layer.
An insulating layer 005 is provided on the Rx pattern 002. The insulating layer is used for ensuring the insulation between Tx and Rx, and is beneficial to the formation of an electric field between Tx and Rx.
A Tx pattern 003 is provided on the insulating layer 005.
An insulating protective layer 006 is disposed on the Tx pattern 003.
Illustratively, an annular black matrix 004 is disposed on the substrate 001, and a region enclosed by the annular black matrix 004 is a schematic view of a visible region, please refer to fig. 4-2.
Alternatively, vias may be formed on the insulating layer 005 and the insulating protective layer 006 so that Tx and Rx may be connected to the integrated circuit through the vias, respectively, i.e., the via regions form a Bonding Pad (Pad) region 007. Fig. 4-3 are schematic diagrams of Tx and Rx connections to the integrated circuit through the pad region 007, respectively.
In summary, in the touch panel provided in the embodiments of the present invention, Tx in the touch panel may be transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; or, Tx is a strip grid Tx, and Rx is a linear Rx, compared with a metal grid arranged in a whole layer in the prior art, the area of metal is reduced, the density of the metal grid is correspondingly reduced, the transmittance of light is further improved, and the influence of the light on the display brightness is weakened, so that the display performance of the touch display device is effectively optimized.
The embodiment of the invention provides a method for manufacturing a touch panel, which comprises the following steps:
an Rx pattern and a Tx pattern are formed on a substrate to be insulated from each other.
The Rx pattern includes a plurality of Rx arranged in an array, and the Rx pattern may be made of metal.
The Tx pattern includes a plurality of Txs arranged in an array, and any Rx is arranged across any Tx.
Wherein Tx may be transparent strip Tx and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; alternatively, Tx is a stripe lattice type Tx, and Rx is a linear Rx. When Tx is a transparent stripe Tx, the Tx pattern may be made of indium tin oxide; when Tx is a stripe grid type Tx, the Tx pattern may be made of metal, for example: the Tx pattern may be made of metal Mo, metal Cu, metal Al, or an alloy material thereof.
In summary, in the method for manufacturing a touch panel according to the embodiment of the invention, Tx in the touch panel may be transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; or, Tx is a strip grid Tx, and Rx is a linear Rx, compared with a metal grid arranged in a whole layer in the prior art, the area of metal is reduced, the density of the metal grid is correspondingly reduced, the transmittance of light is further improved, and the influence of the light on the display brightness is weakened, so that the display performance of the touch display device is effectively optimized.
Alternatively, when Rx is a linear Rx, the linear Rx may also be a zigzag line or a wavy line, and when Rx is a strip grid Rx, the strip grid Rx may also be a zigzag line or a wavy line, and the shape schematic diagram thereof may refer to fig. 2-1 and 2-2.
Alternatively, when Tx is a transparent stripe Tx, the transparent stripe Tx may also be in a zigzag or wavy shape, or the edge of the transparent stripe Tx may also be in a zigzag or wavy shape, and the schematic shape diagram may correspond to fig. 3-1, fig. 3-2, fig. 3-3, and fig. 3-4.
Alternatively, when Tx is a stripe lattice type Tx, the stripe lattice type Tx may also be in a zigzag shape or a wavy shape, and the schematic diagram of the corresponding shape may refer to fig. 2-1 and 2-2.
Optionally, an embodiment of the present invention provides a method for manufacturing a touch panel, and as shown in fig. 5, the method may include:
step 201, forming an annular black matrix on the substrate, wherein a region surrounded by the annular black matrix is a visible region.
Alternatively, the black matrix may be formed using any material capable of blocking light.
For example, a layer of light-shielding material with a certain thickness may be deposited on the substrate by magnetron sputtering, thermal evaporation, or Plasma Enhanced Chemical Vapor Deposition (PECVD), etc., to obtain a black matrix film, and then the black matrix film is processed by a one-step composition process to obtain the annular black matrix.
Step 202, forming an Rx pattern and a Tx pattern insulated from each other on the substrate formed with the annular black matrix.
Alternatively, as shown in fig. 6, the process of forming the Rx pattern and the Tx pattern insulated from each other on the substrate formed with the ring-shaped black matrix may include:
step 2021, forming an Rx pattern on the substrate base plate.
Alternatively, the Rx pattern may be made of metal, for example, the Rx pattern is made of metal Mo, metal Cu, metal Al, or an alloy material thereof, and a value range of the thickness of the Rx pattern may be set according to an actual requirement, which is not limited in this embodiment of the present invention.
For example, a layer of metal material with a certain thickness may be deposited on the substrate by magnetron sputtering, thermal evaporation, or PECVD, etc. to obtain a metal material layer, and then the metal material layer is processed by a one-step patterning process to obtain an Rx pattern.
Step 2022, an insulating layer is formed on the substrate on which the Rx pattern is formed.
Optionally, the material of the insulating layer may be silicon dioxide, silicon nitride, or a mixed material of silicon dioxide and silicon nitride, or an insulating material such as silicon oxide or resin, and the thickness of the insulating layer may be set according to actual needs.
For example, a layer of silicon dioxide with a certain thickness may be deposited on the substrate with the Rx pattern formed thereon by coating, magnetron sputtering, thermal evaporation, or PECVD, to obtain a silicon dioxide material layer, and then a baking process may be performed to form the insulating layer.
It should be noted that, in practical applications, when the insulating layer includes a pattern, the insulating layer may be obtained by processing the silicon dioxide material layer through a one-step composition process, and details of the embodiment of the present invention are not described herein.
Step 2023, a Tx pattern is formed on the base substrate on which the insulating layer is formed.
Alternatively, the Tx pattern may be made of ITO or metal, for example, the Tx pattern may be made of Mo, Cu, Al or alloy thereof, and a value range of a thickness of the Tx pattern may be set according to actual needs.
For example, magnetron sputtering, thermal evaporation, or PECVD may be used to deposit a layer of ITO material with a certain thickness on the substrate with the insulating layer formed thereon to obtain an ITO material layer, and then the ITO material layer is processed by a one-step composition process to obtain a Tx pattern.
It should be noted that the thickness h of the insulating layer between the Rx pattern and the Tx pattern formed in step 2021 and step 2023 and the number n of Rx patterns in the Rx pattern need to satisfy a certain mutual capacitance condition:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
where C is the mutual capacitance between the Rx pattern and the Tx pattern.
Step 203, forming an insulating protection layer on the substrate formed with the Tx pattern.
Optionally, the step 2022 may be referred to as a process of forming an insulating protection layer on the substrate on which the Tx pattern is formed, and details are not repeated here.
Alternatively, after the insulating protective layer is formed on the substrate on which the Tx pattern is formed, vias may be formed on the insulating layer and the insulating protective layer so that Tx and Rx may be connected to the integrated circuit through the vias, respectively, i.e., the via regions form pad regions. A schematic diagram of the connection of Tx and Rx to the integrated circuit through the pad regions, respectively, can be referred to fig. 4-3.
It should be noted that the sequence of the steps of the method for manufacturing a touch panel provided in the embodiment of the present invention may be appropriately adjusted, and the steps may also be increased or decreased according to the situation. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and thus, the detailed description thereof is omitted.
In summary, in the method for manufacturing a touch panel according to the embodiment of the invention, Tx in the touch panel may be transparent strip Tx, and Rx is linear Rx; or, Tx is transparent strip Tx, and Rx is strip lattice Rx; or, Tx is a strip grid Tx, and Rx is a linear Rx, compared with a metal grid arranged in a whole layer in the prior art, the area of metal is reduced, the density of the metal grid is correspondingly reduced, the transmittance of light is further improved, and the influence of the light on the display brightness is weakened, so that the display performance of the touch display device is effectively optimized.
The Touch Panel and the method for manufacturing the Touch Panel provided by the embodiment of the invention can be used for structures such as a Glass Cover plate + a Glass Touch Panel (english: Cover Glass + Glass; abbreviation: G + G), a single-chip Touch Panel (english: One Glass solution; abbreviation: OGS), an out-of-box (english: On Cell), a film (english: film), and a Touch Panel (english: Touch Panel; abbreviation: TP).
An embodiment of the present invention further provides a touch display device, which may include the touch panel shown in fig. 1-1 or fig. 4-1. The touch display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, electronic paper, an OLED panel, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (12)
1. A touch panel, comprising:
a substrate base plate;
a touch sensing electrode pattern and a touch driving electrode pattern which are insulated from each other are arranged on the substrate base plate;
the touch sensing electrode pattern comprises a plurality of touch sensing electrodes arranged in an array, and is made of metal;
the touch driving electrode pattern comprises a plurality of touch driving electrodes arranged in an array, and any touch sensing electrode and any touch driving electrode are arranged in a crossed manner;
the touch driving electrode is a transparent strip-shaped touch driving electrode, and the touch sensing electrode is a strip-shaped grid-type touch sensing electrode;
and when the touch drive electrode is a transparent strip-shaped touch drive electrode, the transparent strip-shaped touch drive electrode is in a zigzag shape or a wavy line shape, or the edge of the transparent strip-shaped touch drive electrode is in a zigzag shape or a wavy line shape.
2. The touch panel of claim 1,
when the touch sensing electrode is a strip-shaped grid type touch sensing electrode, the strip-shaped grid type touch sensing electrode is in a zigzag shape, or the strip-shaped grid type touch sensing electrode is in a wavy line shape.
3. The touch panel of claim 1, wherein the touch driving electrodes are transparent stripe-shaped touch driving electrodes, and the touch driving electrode pattern is made of indium tin oxide.
4. The touch panel of any one of claims 1 to 3, wherein a thickness h of the insulating layer between the touch sensing electrode pattern and the touch driving electrode pattern and a number n of touch sensing electrodes in the touch sensing electrode pattern satisfy a mutual capacitance condition:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
and C is a mutual capacitance value between the touch sensing electrode pattern and the touch driving electrode pattern.
5. The touch panel according to claim 1, wherein a direction of a length of any one of the touch sensing electrodes is perpendicular to a direction of a length of any one of the touch driving electrodes.
6. The touch panel of claim 1,
an annular black matrix is arranged on the substrate base plate, and a region surrounded by the annular black matrix is a visible region;
the annular black matrix is provided with the touch sensing electrode pattern;
an insulating layer is arranged on the touch sensing electrode pattern;
the insulating layer is provided with the touch drive electrode pattern;
and an insulating protective layer is arranged on the touch drive electrode pattern.
7. A method for manufacturing a touch panel, comprising:
forming a touch sensing electrode pattern and a touch driving electrode pattern which are insulated from each other on a substrate;
the touch sensing electrode pattern comprises a plurality of touch sensing electrodes arranged in an array, and is made of metal;
the touch driving electrode pattern comprises a plurality of touch driving electrodes arranged in an array, and any touch sensing electrode and any touch driving electrode are arranged in a crossed manner;
the touch driving electrode is a transparent strip-shaped touch driving electrode, and the touch sensing electrode is a strip-shaped grid-type touch sensing electrode;
and when the touch drive electrode is a transparent strip-shaped touch drive electrode, the transparent strip-shaped touch drive electrode is in a zigzag shape or a wavy line shape, or the edge of the transparent strip-shaped touch drive electrode is in a zigzag shape or a wavy line shape.
8. The method of claim 7,
when the touch sensing electrode is a strip-shaped grid type touch sensing electrode, the strip-shaped grid type touch sensing electrode is in a zigzag shape, or the strip-shaped grid type touch sensing electrode is in a wavy line shape.
9. The method of claim 7, wherein the touch driving electrodes are transparent stripe-shaped touch driving electrodes, and the touch driving electrode patterns are made of indium tin oxide.
10. The method according to any one of claims 7 to 9,
the formation of mutually insulated touch sensing electrode patterns and touch driving electrode patterns on a substrate includes:
forming a touch sensing electrode pattern on the substrate base plate;
forming an insulating layer on the touch sensing electrode pattern;
forming a touch drive electrode pattern on the insulating layer;
the thickness h of the insulating layer between the touch sensing electrode pattern and the touch driving electrode pattern and the number n of the touch sensing electrodes in the touch sensing electrode pattern meet a mutual capacitance condition, wherein the mutual capacitance condition is as follows:
c ═ f (h, n), 0.3 picofarad ≤ C ≤ 3 picofarads;
and C is a mutual capacitance value between the touch sensing electrode pattern and the touch driving electrode pattern.
11. The method of claim 10,
before the mutually insulated touch sensing electrode patterns and touch driving electrode patterns are formed on the substrate, the method further comprises the following steps:
forming an annular black matrix on the substrate, wherein a region surrounded by the annular black matrix is a visible region;
after forming a touch drive electrode pattern on the insulating layer, the method further includes:
and forming an insulating protection layer on the touch drive electrode pattern.
12. A touch display device, comprising:
the touch panel of any one of claims 1 to 6.
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| WO2018227470A1 (en) | 2017-06-15 | 2018-12-20 | Boe Technology Group Co., Ltd. | Touch substrate, touch control display panel, and method of fabricating touch substrate |
| CN109976566B (en) * | 2018-03-23 | 2021-05-18 | 京东方科技集团股份有限公司 | Touch structure, touch substrate, manufacturing method of touch substrate and display device |
| CN110767825B (en) | 2018-08-06 | 2022-06-21 | 云谷（固安）科技有限公司 | Display panel, display screen and display terminal |
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