CN113391728A - Touch display module, manufacturing method thereof and display device - Google Patents
Touch display module, manufacturing method thereof and display device Download PDFInfo
- Publication number
- CN113391728A CN113391728A CN202110708497.2A CN202110708497A CN113391728A CN 113391728 A CN113391728 A CN 113391728A CN 202110708497 A CN202110708497 A CN 202110708497A CN 113391728 A CN113391728 A CN 113391728A
- Authority
- CN
- China
- Prior art keywords
- electrode
- touch
- display
- layer
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 103
- 230000005284 excitation Effects 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
- HKBLLJHFVVWMTK-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti].[Ti] HKBLLJHFVVWMTK-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 95
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
-
- 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
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The embodiment of the invention discloses a touch display module, a manufacturing method thereof and a display device. In one embodiment, the touch display module includes a display substrate and a touch unit, the touch unit includes a conductive bridge layer, an insulating layer, an electrode layer and a touch signal line, wherein: the electrode layer includes along m first electrode rows of first direction and along n second electrode row of second direction, the conductive bridge layer is including setting up a plurality of conductive bridges in the display area, the first electrode of every first electrode row is electric connection on the electrode layer, adjacent second electrode is connected with same conductive bridge electricity through first via hole, touch signal line includes with the conductive bridge with the same layer setting and with n first walking line that the second electrode row corresponds, first walking line sets up in the display area, first walking line is connected with the second electrode row electricity that corresponds through the second via hole. According to the embodiment, the first wiring is arranged in the display area and arranged on the same layer with the conductive bridge, so that short circuit and open circuit of the first wiring can be avoided, and the frame is reduced.
Description
Technical Field
The invention relates to the field of touch display. More particularly, the present invention relates to a touch display module, a method for manufacturing the same, and a display device.
Background
At present, in the MLOC (Multiple Layer On Cell, multilayer integrated touch) technology, a longitudinal (or transverse) excitation signal emitting electrode and a transverse (or longitudinal) touch signal receiving electrode are formed On a display module such as LTPS, TFT-LCD and the like, the electrodes are connected with a touch driving IC through wiring, and a touch position is detected by detecting a change in coupling capacitance between the longitudinal electrode and the transverse electrode. FMLOC (Flexible Multiple Layer On Cell), that is, applying MLOC technology to a Flexible display substrate to form a Flexible touch substrate. However, no matter in the MLOC or FMLOC technologies, the touch signal lines are routed from the non-display area at the periphery of the display area, the routing is dense in the limited space, the problems of short circuit and open circuit of the signal lines exist, and the narrow frame is difficult to realize.
Disclosure of Invention
The present invention aims to provide a solution to at least one of the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first aspect of the present invention provides a touch display module, including: display substrates and the touch-control unit of setting on display substrates, display substrates includes display area and non-display area, and touch-control unit includes conductive bridge layer, insulating layer, electrode layer and touch-control signal line, wherein:
the electrode layer comprises electrodes arranged in an array in the display area, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first via holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer with the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second through holes penetrating through the insulating layer.
In some optional embodiments, the first trace includes a plurality of capacitance compensation portions corresponding to the second electrodes, and a connection portion connecting the capacitance compensation portions, and an orthographic projection of the second electrode on the display substrate covers an orthographic projection of the capacitance compensation portions on the display substrate.
In some alternative embodiments, the projected area of the orthographic projection of the capacitance compensation part on the display substrate is equal to the projected area of the orthographic projection of the second electrode on the display substrate.
In some optional embodiments, the second electrode is an excitation signal transmitting electrode, and the first electrode is a touch signal receiving electrode.
In some optional embodiments, the non-display area includes a first side and a second side that are oppositely disposed in the second direction, and the touch signal line includes m second traces that correspond to the first electrode rows and are disposed on the first side and the second side;
the first electrode row comprises a first end and a second end, the second wiring arranged on the first side edge is electrically connected with the first end of the corresponding first electrode row, and the second wiring arranged on the second side edge is electrically connected with the second end of the corresponding first electrode row.
In some optional embodiments, the display substrate is a flexible substrate, and the material of the first electrode and the second electrode is titanium aluminum titanium.
In some alternative embodiments, the first electrode and the second electrode are mesh structures.
In some alternative embodiments, the display substrate is a rigid substrate, and the material of the first electrode and the second electrode is indium tin oxide.
In some of the alternative embodiments, the first and second,
the touch unit comprises a conductive bridge layer, an insulating layer and an electrode layer which are sequentially stacked on the display substrate; or
The touch unit comprises an electrode layer, an insulating layer and a conductive bridge layer which are sequentially stacked on the display substrate.
In some optional embodiments, the display substrate is an OLED display substrate or an LCD display substrate, a Mini led display substrate, or a Micro led display substrate.
A second aspect of the present invention provides a display device, including the touch display module described above.
A second aspect of the present invention provides a method for manufacturing the touch display module, including:
forming a display substrate; and
form the touch-control unit of setting on display substrate, display substrate includes display area and non-display area, and the touch-control unit includes conductive bridge layer, insulating layer, electrode layer and touch-control signal line, wherein:
the electrode layer comprises electrodes arranged in an array in the display area, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first via holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer with the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second through holes penetrating through the insulating layer.
The invention has the following beneficial effects:
aiming at the existing problems, the invention sets a touch display module, a manufacturing method thereof and a display device, arranges the routing of the electrode row connected by the conductive bridge in the display area and arranges the routing and the conductive bridge in the same layer, so that the routing does not need to be wired through the non-display area at the periphery of the display area, the line width and the line spacing can be increased, and the short circuit caused by the narrow line spacing and the open circuit caused by the narrow line width can be avoided; in addition, the routing is arranged in the display area, so that the frame can be further reduced under the condition of not changing the line width and the line spacing, and more excellent narrow-frame display is realized; in addition, the wiring is arranged in the display area, so that compensation can be formed on signals of the touch electrode, the touch uniformity is improved, and the touch display panel has a wide application prospect.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1a shows a schematic top view of a touch display module according to the prior art.
Fig. 1b shows a schematic cross-sectional view of the touch display module according to the embodiment of the invention, taken along line AA' in fig. 1 a.
Fig. 2 is a schematic top view of a touch display module according to an embodiment of the invention.
Fig. 3 shows a schematic cross-sectional view of the touch display module according to the embodiment of the invention, taken along the line BB' in fig. 2.
Fig. 4 is a schematic top view illustrating a first trace of a touch display module according to an embodiment of the invention.
Fig. 5 is a schematic diagram illustrating a touch detection principle in the touch display module.
Fig. 6 is a schematic cross-sectional view illustrating a touch display module according to another embodiment of the invention.
Fig. 7 is a schematic flow chart of a method for manufacturing a touch display module according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to the following examples and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The terms "on … …", "formed on … …" and "disposed on … …" as used herein may mean that one layer is formed or disposed directly on another layer or that one layer is formed or disposed indirectly on another layer, i.e., there is another layer between the two layers.
It should be noted that, although the terms "first", "second", etc. may be used herein to describe various elements, components, elements, regions, layers and/or sections, these elements, components, elements, regions, layers and/or sections should not be limited by these terms. Rather, these terms are used to distinguish one element, component, element, region, layer or section from another. Thus, for example, a first component, a first member, a first element, a first region, a first layer, and/or a first portion discussed below could be termed a second component, a second member, a second element, a second region, a second layer, and/or a second portion without departing from the teachings of the present invention.
In the present invention, unless otherwise specified, the term "disposed on the same layer" is used to mean that two layers, components, members, elements or portions may be formed by the same manufacturing process (e.g., patterning process, etc.), and the two layers, components, members, elements or portions are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that the functional layers arranged in the same layer can be formed by using the same material layer and using the same manufacturing process, so that the manufacturing process of the display substrate can be simplified.
In the prior art, as shown in fig. 1a, a touch unit of a touch display module includes Tx electrodes, Rx electrodes and touch signal lines, wherein the Tx electrodes are excitation signal transmitting electrodes, the Rx electrodes are touch signal receiving electrodes, which are both disposed in a display area AA, the Tx electrodes are disposed in a plurality of Tx electrode rows along an X direction, and the Rx electrodes are disposed in a plurality of Rx electrode columns along a Y direction. As shown in fig. 1b, Rx electrodes and Tx electrodes are disposed in the same layer, the Rx electrodes being directly connected together in this layer, and the Tx electrodes being electrically connected together by an electrode bridge disposed therebelow, thereby forming respective electrode rows or electrode columns. The touch signal lines include Tx traces connected to the Tx electrodes and Rx traces connected to the Rx electrodes to be connected to the touch driving IC, wherein the Tx traces include traces corresponding to the Tx electrode rows and connected to one end of each Tx electrode row, the Tx traces further include traces (not shown) connected to one end of each Tx electrode row to form an excitation signal transmitting circuit, and the Rx traces of the Rx electrode rows only need to be led out from one end of each electrode row to be connected to the touch driving IC to detect a touch signal.
As can be seen from fig. 1a, since the Tx electrode includes traces that need to be led out from two ends of the Tx electrode column, the traces that form the loop need to occupy additional space in addition to the lower side of the display area AA. In the prior art, the Tx traces and the Rx traces are both disposed in the non-display area at the periphery of the display area AA, so that a large amount of traces corresponding to the Tx electrode rows are disposed on one side of the non-display area, and a large amount of traces corresponding to the Rx electrode rows are disposed on the other side of the non-display area, which causes a narrow trace pitch, a short circuit problem, a small trace width, and an open circuit problem. In addition, when the line spacing and line width problems of the traces are not considered, the large number of traces will limit the narrow bezel design. In addition, when the touch display module is manufactured by adopting the FMLOC technology, the problems of short circuit and open circuit of the routing lines caused by unevenness are also caused because the peripheral non-display area of the display area AA is uneven.
Based on one of the above problems, an embodiment of the present invention provides a touch display module, including: display substrates and the touch-control unit of setting on display substrates, display substrates includes display area and non-display area, and touch-control unit includes conductive bridge layer, insulating layer, electrode layer and touch-control signal line, wherein:
the electrode layer comprises electrodes arranged in an array in the display area, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first via holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer with the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second through holes penetrating through the insulating layer.
In the embodiment, the routing of the electrode rows connected by the conductive bridge is arranged in the display area and is arranged on the same layer as the conductive bridge, so that the routing does not need to be wired in a non-display area on the periphery of the display area, the line width and the line spacing are increased, short circuit caused by over-narrow line spacing and open circuit caused by over-narrow line width are avoided, and for a flexible substrate, for example, a display substrate of a touch display module is a display substrate manufactured by the FMLOC technology, open circuit and short circuit caused by unevenness of a peripheral area of the display area can be avoided, so that the product yield is improved; in addition, the routing is arranged in the display area, so that the frame can be further reduced under the condition of not changing the line width and the line spacing, and more excellent narrow-frame display is realized; in addition, the wiring is arranged in the display area, so that compensation can be formed on signals of the touch electrode, the touch uniformity is improved, and the touch display panel has a wide application prospect.
In a specific example, as shown in fig. 2 and 3, the touch display module includes a display substrate 200 and a touch unit disposed on the display substrate 200. The display substrate 200 includes a display area AA and a non-display area surrounding the display area AA; the touch unit comprises a conductive bridge layer, an insulating layer, an electrode layer and a touch signal line.
The conductive bridge layer includes a plurality of conductive bridges 205, the electrode layer includes electrodes arranged in an array in the display area AA, the electrodes include m first electrode rows along the Y direction and n second electrode columns along the X direction, each first electrode row includes n first electrodes 201, and each second electrode column includes m second electrodes, so as to ensure that each first electrode 201 has a second electrode 203 corresponding thereto, and to ensure that each electrode can have a coupling capacitance corresponding thereto. Wherein, the X direction is perpendicular to the Y direction, m and n are integers, and of course, the values of m and n can be the same or different.
Specifically, the display substrate 200 may be a flexible substrate or a rigid substrate, and when the display substrate 200 is a flexible substrate, for example, the display substrate is a display substrate manufactured by using FMOLC technology, it is preferable that the material of the first electrode 203 and the second electrode is titanium aluminum titanium with high toughness. Since TiAlTiAl is an opaque metal material, the first electrode 201 and the second electrode 203 are mesh structures, as shown in FIG. 2. The design can satisfy the light that the display substrates sent and see through the mesh outgoing, can also further ensure the pliability of flexible substrate simultaneously. When the display substrate 200 is a rigid substrate, for example, the display substrate is a display substrate manufactured by the MOLC technology, it is preferable that the material of the first electrode and the second electrode is indium tin oxide. Because the indium tin oxide is a transparent metal oxide material, the problems of light transmission and flexibility are not needed to be worried about, and the first electrode and the second electrode can be whole-layer electrode blocks so as to reduce the process cost.
In addition, the display substrate 200 may be an OLED display substrate, an LCD display substrate, a Mini led display substrate, or a Micro led display substrate. It will be understood by those skilled in the art that when the display substrate is a flexible substrate, it is an OLED display substrate, a Mini led display substrate, or a Micro led display substrate.
As shown with continued reference to fig. 2 and 3, the first electrodes 201 in each first electrode row are directly electrically connected on the electrode layer, i.e., the plurality of first electrodes 201 in the first electrode row are formed as a unitary structure. In addition, the adjacent second electrodes 203 in each second electrode column are electrically connected to the same conductive bridge 205 through first vias penetrating the insulating layer 209. Optionally, the first electrode 201 is a touch signal receiving electrode, and the second electrode 203 is an excitation signal emitting electrode. Of course, the present invention is not intended to be limited, and the first electrode 201 may be an excitation signal transmitting electrode and the first electrode 203-1 may be a touch signal receiving electrode, if necessary.
However, under the same condition, the excitation signal emitting electrode is electrically connected through the conductive bridge of another layer, and the touch signal receiving electrode is directly electrically connected on the electrode layer, because the electrical connection is performed through the conductive bridge of the other side, the signal uniformity is worse than that of the same layer, the loops of the excitation signal emitting electrode are all in a power-on state in the working process of the touch display module, the signal loops are relatively stable, the touch signal receiving electrode generates a sensing signal only when touch occurs, and the touch signal detection sensitivity can be improved by adopting the same layer electrical connection mode with better uniformity.
In particular, with reference to fig. 2 and fig. 3, the touch signal line includes n first traces 207 corresponding to the second electrode rows one to one, the first traces 207 and the conductive bridges 205 are disposed in the same layer, and the first traces 207 are disposed in the display area AA. The first wire 207 is electrically connected to the corresponding second electrode column through a second via 211 penetrating the insulating layer 209.
It should be understood by those skilled in the art that, in fig. 2, in order to illustrate the position of the first trace 207, the 1 st second electrode column is omitted in the top view, the first trace 207 is shown in a perspective view, and in addition, in order to clearly illustrate the layout of the touch unit, other second electrode columns are reserved.
Through the arrangement, the first wiring corresponding to the second electrode electrically connected through the conductive bridge is arranged in the display area, the distance between the first wirings and the line width of the first wirings can be increased by utilizing the display area with a large area, and the short circuit problem caused by narrow distance and the short circuit problem caused by small line width are avoided when the wirings are arranged on the periphery of the display area. When the display substrate is made by adopting the FMLOC technology, the first wiring is no longer arranged on the periphery of the display area, and the problems of short circuit and open circuit caused by an uneven non-display area are avoided.
In addition, the first routing lines corresponding to the second electrodes electrically connected through the conductive bridges are arranged in the display area, so that the routing lines do not need to occupy the peripheral non-display area of the display area, namely, the frame area of the touch display substrate, the frame can be greatly reduced under the condition that the space or the line width of other remaining routing lines in the non-display area is not required to be increased, and the excellent narrow-frame display is realized. In actual design, a designer may compromise between the line pitch, the line width, and the narrow-frame display to design.
In addition, it should be understood by those skilled in the art that the first electrode 201 is taken as a touch signal receiving electrode and the second electrode 203 is taken as an excitation signal emitting electrode in the present example, in this example, the second via 211 is disposed at one end of the second electrode column to ensure that the excitation signal penetrates through the entire column of the electrode column, and in addition, although not shown in the figure, the touch signal trace should further include a trace electrically connected to the other ends of the n second electrode columns, and the first trace 207 electrically connected to one end of the second electrode column and the trace electrically connected to the other end of the second electrode column are to be electrically connected to the touch driving IC, so as to provide a loop of the excitation signal for each column of the second electrode columns.
Optionally, as shown in fig. 2, in this example, the non-display area includes a first side and a second side that are oppositely disposed in the second direction, and the touch signal line includes m second traces 213 that correspond to the first electrode rows and are disposed on the first side and the second side; the first electrode row comprises a first end and a second end, the second wire 213 arranged on the first side edge is electrically connected with the first end of the corresponding first electrode row, and the second wire 213 arranged on the second side edge is electrically connected with the second end of the corresponding first electrode row.
Through the arrangement, because the wires on two sides of the non-display area can be selected only by the m second wires connected with one end of the first electrode row, the wire distance and the wire width of the wires of the first electrode can be doubled, and the problems of short circuit and open circuit of the wires of the first electrode arranged on the periphery can be well solved no matter the display substrate is a rigid substrate or a flexible substrate. In addition, through this setting, under the condition that does not change the line interval and the linewidth of the line of walking of first electrode, can all reduce the frame of first side and second side by half, realize more excellent narrow frame and show.
Optionally, under the condition that the first trace 207 of the second electrode is disposed in the display area, the trace of the first electrode row may also be disposed in the display area and disposed on the same layer as the conductive bridge, the purpose of increasing the width and line spacing of the trace of the first electrode row may also be achieved by using the large space of the display area, and meanwhile, when the touch display substrate is FMLOC, the problem of open circuit and short circuit caused by the trace of the first electrode row may also be avoided. In addition, because the line width is increased, the line resistance can be reduced, the sensitivity of touch detection is improved, and the frame can be further reduced.
In another alternative case, when the first electrode 201 is an excitation signal emitting electrode and the second electrode 203 is a touch signal receiving electrode, those skilled in the art will understand that, because the touch signal receiving electrode only needs to lead out a trace for detection at one end of the electrode column, there is no trace at the other end of the second electrode column. The wiring of the first electrode row is arranged in the display area, the width of the wiring of the first electrode row can be increased by utilizing the large space of the display area, and the wiring resistance is reduced, so that the sensitivity of touch detection is improved.
On the other hand, in the embodiment of the invention, because each second electrode column corresponds to one first trace, if the second electrode is an excitation signal emission electrode, the first end of the second electrode column is connected to the first trace through the second via and extends to the other end of the second electrode column along the Y direction, after the second electrode is powered on, and the voltage of the other end is different from that of the first end of the second electrode column, the coupling capacitance of the second electrode and the first electrode at different positions on the electrode column will be different, which will bring detection errors, and the first trace disposed in the display area will also generate a coupling capacitance with the first electrode, on the first trace, because the voltage of the first trace will gradually decrease in the direction from the second via position to the other end position of the second electrode column, that is, in a direction opposite to the trend of the second electrode column, the coupling capacitance between the first trace and the first electrode will form compensation for the coupling capacitance between the second electrode and the first electrode, the accuracy of touch signal detection is improved.
In an alternative embodiment, referring to fig. 5, the first trace 207 includes a plurality of capacitance compensation portions 217 corresponding to the second electrodes 203 and a connection portion 227 connecting the capacitance compensation portions 217, and an orthographic projection of the second electrodes 203 on the display substrate 200 covers an orthographic projection of the capacitance compensation portions 217 on the display substrate.
Through the arrangement, the first wire 207 can be arranged below or above the second electrode column, and referring to the circuit schematic diagram shown in fig. 6, because coupling capacitors exist at five adjacent positions between two electrodes, when the first wire of the second electrode 203 is arranged above or below the electrode, the first wire is relatively even from the first electrode, the generated compensation capacitor is relatively even, and the compensation effect is better.
Of course, it should be understood by those skilled in the art that although the capacitance compensation portion 217 plays a main role of capacitance compensation, in practical applications, a coupling capacitance exists between the connection portion and the first electrode, and can also play an auxiliary role of capacitance compensation. As will be understood by those skilled in the art, because the first trace 207 is disposed on the same layer as the conductive bridge 205, in a top view of the first trace 207, the connection portion 227 will bypass the conductive bridge, i.e., not overlap the conductive bridge. In this example, the connection portion 227 is configured to be a ring shape as shown in fig. 5, and preferably, the ring shape is symmetric with respect to the orthographic projection of the conductive bridge, so that the uniformity of compensation can be further enhanced, and will not be described in detail herein.
In addition, the orthographic projection of the second electrode 203 on the display substrate 200 covers the orthographic projection of the capacitance compensation part 217 on the display substrate, so that the second electrode 203 can cover the capacitance compensation part 217, and therefore when external light irradiates the touch display substrate, new moire (mura) lines cannot be added to extra exposed wires.
More preferably, the projected area of the orthographic projection of the capacitance compensation part 217 on the display substrate 200 is equal to the projected area of the orthographic projection of the second electrode 203 on the display substrate 200. When the projected areas of the two are set to be equal, the compensation action of the capacitance compensation portion 217 can be further optimized.
It should be noted that the cross-sectional structures in the above embodiments are all referred to as the cross-sectional view shown in fig. 3, that is, the touch unit includes a conductive bridge layer, an insulating layer, and an electrode layer sequentially stacked on the display substrate 200. That is, the electrode layer is disposed on a side of the insulating layer away from the display substrate 200. This is done because the electrode layer and the metal layer in the display substrate also form coupling capacitors, which become noises in touch detection, and the electrode layer is away from the display substrate 200, which can reduce the noises and improve the touch detection accuracy.
However, the present invention is not intended to be limited, and alternatively, as shown in fig. 6, the touch unit includes an electrode layer, an insulating layer 209-1, and a conductive bridge layer, which are sequentially stacked on the display substrate 200. The electrode layer includes a first electrode 201-1 and a second electrode 203-1, the conductive bridge layer includes a conductive bridge 205-1, and the first trace 207-1 and the conductive bridge are disposed on the same layer. Those skilled in the art will understand that other structural functions are the same as the principles of the above embodiments and are not described in detail herein.
Referring to fig. 7, an embodiment of the invention further provides a method for manufacturing the touch display module, which includes:
s1, forming a display substrate; and
s2, forming a touch unit arranged on the display substrate, wherein the display substrate comprises a display area and a non-display area, the touch unit comprises a conductive bridge layer, an insulating layer, an electrode layer and a touch signal line, wherein:
the electrode layer comprises electrodes arranged in an array in the display area, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first via holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer with the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second through holes penetrating through the insulating layer.
In the embodiment, the routing of the electrode rows connected by the conductive bridge is arranged in the display area and is arranged on the same layer as the conductive bridge, so that the routing does not need to be wired in a non-display area on the periphery of the display area, the line width and the line spacing are increased, short circuit caused by over-narrow line spacing and open circuit caused by over-narrow line width are avoided, and for a flexible substrate, for example, a display substrate of a touch display module is a display substrate manufactured by the FMLOC technology, open circuit and short circuit caused by unevenness of a peripheral area of the display area can be avoided, so that the product yield is improved; in addition, the routing is arranged in the display area, so that the frame can be further reduced under the condition of not changing the line width and the line spacing, and more excellent narrow-frame display is realized; in addition, the wiring is arranged in the display area, so that compensation can be formed on signals of the touch electrode, the touch uniformity is improved, and the touch display panel has a wide application prospect.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the touch display module described above.
Since the touch display module included in the display device provided in the embodiment of the present application corresponds to the touch display modules provided in the above-mentioned several embodiments, the foregoing embodiments are also applicable to the embodiment, and detailed description is not given in this embodiment.
In this embodiment, the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a vehicle-mounted display, a digital photo frame, or a navigator.
Aiming at the existing problems, the invention sets a touch display module, a manufacturing method thereof and a display device, arranges the routing of the electrode row connected by the conductive bridge in the display area and arranges the routing and the conductive bridge in the same layer, so that the routing does not need to be wired through the non-display area at the periphery of the display area, the line width and the line spacing are increased, and the short circuit caused by the over-narrow line spacing and the open circuit caused by the over-narrow line width are avoided; in addition, the routing is arranged in the display area, so that the frame can be further reduced under the condition of not changing the line width and the line spacing, and more excellent narrow-frame display is realized; in addition, the wiring is arranged in the display area, so that compensation can be formed on signals of the touch electrode, the touch uniformity is improved, and the touch display panel has a wide application prospect.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.
Claims (12)
1. A touch display module comprises: display substrates and setting are in touch-control unit on the display substrates, display substrates includes display area and non-display area, touch-control unit includes conductive bridge layer, insulating layer, electrode layer and touch-control signal line, wherein:
the electrode layer comprises electrodes arranged in the display area in an array mode, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first through holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer as the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second via holes penetrating through the insulating layer.
2. The touch display module according to claim 1, wherein the first trace includes a plurality of capacitance compensation portions corresponding to the second electrodes and a connection portion connecting each of the capacitance compensation portions, and an orthogonal projection of the second electrode on the display substrate covers an orthogonal projection of the capacitance compensation portion on the display substrate.
3. The touch display module of claim 2, wherein a projected area of an orthogonal projection of the capacitance compensation portion on the display substrate is equal to a projected area of an orthogonal projection of the second electrode on the display substrate.
4. The touch display module according to any one of claims 1-3, wherein the second electrode is an excitation signal emitting electrode and the first electrode is a touch signal receiving electrode.
5. The touch display module according to claim 4, wherein the non-display area includes a first side and a second side opposite to each other in the second direction, and the touch signal lines include m second traces corresponding to the first electrode rows and disposed on the first side and the second side;
the first electrode row comprises a first end and a second end, the second wiring arranged on the first side edge is electrically connected with the corresponding first end of the first electrode row, and the second wiring arranged on the second side edge is electrically connected with the corresponding second end of the first electrode row.
6. The touch display module of claim 1, wherein the display substrate is a flexible substrate, and the first electrode and the second electrode are made of titanium aluminum titanium.
7. The touch display module of claim 6, wherein the first electrode and the second electrode are mesh structures.
8. The touch display module of claim 1, wherein the display substrate is a rigid substrate, and the first electrode and the second electrode are made of indium tin oxide.
9. The touch display module of claim 1, wherein the touch sensing element is disposed on the substrate,
the touch unit comprises the conductive bridge layer, the insulating layer and the electrode layer which are sequentially stacked on the display substrate; or
The touch unit comprises the electrode layer, the insulating layer and the conductive bridge layer which are sequentially stacked on the display substrate.
10. The touch display module of claim 1, wherein the display substrate is an OLED display substrate, an LCD display substrate, a Miniled display substrate, or a Micro led display substrate.
11. A display device comprising the touch display module according to any one of claims 1 to 10.
12. A method for manufacturing the touch display module defined in any one of claims 1-10, comprising:
forming a display substrate; and
forming a touch unit arranged on the display substrate, wherein the display substrate comprises a display area and a non-display area, the touch unit comprises a conductive bridge layer, an insulating layer, an electrode layer and a touch signal line, and the touch unit comprises:
the electrode layer comprises electrodes arranged in the display area in an array mode, the electrodes comprise m first electrode rows along a first direction and n second electrode columns along a second direction, the conductive bridge layer comprises a plurality of conductive bridges arranged in the display area, each first electrode row comprises n first electrodes, the first electrodes of each first electrode row are electrically connected on the electrode layer, each second electrode column comprises m second electrodes, the adjacent second electrodes are electrically connected with the same conductive bridge through first through holes penetrating through the insulating layer, the first direction is perpendicular to the second direction, m and n are integers,
the touch signal line comprises n first wires which are arranged on the same layer as the conductive bridge and correspond to the second electrode rows one to one, the first wires are arranged in the display area, and the first wires are electrically connected with the corresponding second electrode rows through second via holes penetrating through the insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110708497.2A CN113391728B (en) | 2021-06-23 | 2021-06-23 | Touch display module, manufacturing method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110708497.2A CN113391728B (en) | 2021-06-23 | 2021-06-23 | Touch display module, manufacturing method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113391728A true CN113391728A (en) | 2021-09-14 |
| CN113391728B CN113391728B (en) | 2024-06-18 |
Family
ID=77624158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110708497.2A Active CN113391728B (en) | 2021-06-23 | 2021-06-23 | Touch display module, manufacturing method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113391728B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113849079A (en) * | 2021-09-17 | 2021-12-28 | 昆山国显光电有限公司 | Display panel and display device |
| CN113900546A (en) * | 2021-11-04 | 2022-01-07 | 信利（惠州）智能显示有限公司 | Touch panel and touch display screen |
| TWI778884B (en) * | 2021-12-06 | 2022-09-21 | 王士華 | In-plane sensor |
| CN115268702A (en) * | 2022-09-30 | 2022-11-01 | 惠科股份有限公司 | Touch panel and touch display device |
| WO2024120183A1 (en) * | 2022-12-08 | 2024-06-13 | 武汉华星光电半导体显示技术有限公司 | Display panel and display apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407758A (en) * | 2014-12-04 | 2015-03-11 | 合肥鑫晟光电科技有限公司 | Capacitive touch panel and display device |
| CN106292036A (en) * | 2016-09-28 | 2017-01-04 | 厦门天马微电子有限公司 | A kind of array base palte, display device and preparation method thereof |
| CN107092393A (en) * | 2017-04-21 | 2017-08-25 | 京东方科技集团股份有限公司 | Touch base plate and preparation method thereof and touch-control display panel |
| CN108319398A (en) * | 2018-02-28 | 2018-07-24 | 京东方科技集团股份有限公司 | A kind of touch panel and preparation method thereof, touch device |
| US20180348902A1 (en) * | 2016-07-04 | 2018-12-06 | Boe Technology Group Co., Ltd. | Touch substrate, touch display panel and touch display apparatus having the same, and fabricating method thereof |
| CN109375827A (en) * | 2018-12-14 | 2019-02-22 | 武汉华星光电半导体显示技术有限公司 | Touch-control display panel and touch control display apparatus |
| CN209560243U (en) * | 2019-03-12 | 2019-10-29 | 昆山龙腾光电有限公司 | Array substrate, special-shaped display panel and display device |
-
2021
- 2021-06-23 CN CN202110708497.2A patent/CN113391728B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407758A (en) * | 2014-12-04 | 2015-03-11 | 合肥鑫晟光电科技有限公司 | Capacitive touch panel and display device |
| US20180348902A1 (en) * | 2016-07-04 | 2018-12-06 | Boe Technology Group Co., Ltd. | Touch substrate, touch display panel and touch display apparatus having the same, and fabricating method thereof |
| CN106292036A (en) * | 2016-09-28 | 2017-01-04 | 厦门天马微电子有限公司 | A kind of array base palte, display device and preparation method thereof |
| CN107092393A (en) * | 2017-04-21 | 2017-08-25 | 京东方科技集团股份有限公司 | Touch base plate and preparation method thereof and touch-control display panel |
| CN108319398A (en) * | 2018-02-28 | 2018-07-24 | 京东方科技集团股份有限公司 | A kind of touch panel and preparation method thereof, touch device |
| CN109375827A (en) * | 2018-12-14 | 2019-02-22 | 武汉华星光电半导体显示技术有限公司 | Touch-control display panel and touch control display apparatus |
| CN209560243U (en) * | 2019-03-12 | 2019-10-29 | 昆山龙腾光电有限公司 | Array substrate, special-shaped display panel and display device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113849079A (en) * | 2021-09-17 | 2021-12-28 | 昆山国显光电有限公司 | Display panel and display device |
| CN113849079B (en) * | 2021-09-17 | 2023-08-04 | 昆山国显光电有限公司 | Display panel and display device |
| CN113900546A (en) * | 2021-11-04 | 2022-01-07 | 信利（惠州）智能显示有限公司 | Touch panel and touch display screen |
| CN113900546B (en) * | 2021-11-04 | 2024-04-16 | 信利（惠州）智能显示有限公司 | Touch panel and touch display screen |
| TWI778884B (en) * | 2021-12-06 | 2022-09-21 | 王士華 | In-plane sensor |
| CN115268702A (en) * | 2022-09-30 | 2022-11-01 | 惠科股份有限公司 | Touch panel and touch display device |
| CN115268702B (en) * | 2022-09-30 | 2023-01-24 | 惠科股份有限公司 | Touch panel and touch display device |
| WO2024120183A1 (en) * | 2022-12-08 | 2024-06-13 | 武汉华星光电半导体显示技术有限公司 | Display panel and display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113391728B (en) | 2024-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113391728B (en) | Touch display module, manufacturing method thereof and display device | |
| KR102540895B1 (en) | Touch sensor and display device having the same | |
| EP2427035B1 (en) | Touch screen panel apparatus | |
| US10684720B2 (en) | Touch display panel, touch display device and drive method | |
| US10133380B2 (en) | Touch display device and driving method thereof | |
| US10325732B2 (en) | Touch window having improved electrode pattern structure | |
| US20220291775A1 (en) | Electronic device | |
| US20100163394A1 (en) | Capacitive Touch Panel | |
| KR20100095400A (en) | Capacitive touch panel | |
| CN103748538A (en) | Touch sensitive displays | |
| US9323295B2 (en) | Touch panel | |
| EP3477448A1 (en) | Touch panel, and display device | |
| US20140210765A1 (en) | Capacitive Single Layer Multi-Touch Panel Having Improved Response Characteristics | |
| KR101668964B1 (en) | Input device | |
| CN108762550B (en) | Touch display substrate, touch display method and touch display device | |
| CN114237422A (en) | Touch display panel and display device | |
| KR20170056082A (en) | In-cell touch type liquid crystal display device | |
| US20230359305A1 (en) | Touch screen shield layer with ring and tapping points | |
| KR101926622B1 (en) | Touch window | |
| CN112328122A (en) | Touch display panel and touch display device | |
| KR102681004B1 (en) | Architecture for differential drive and sense for touch sensor panel | |
| CN114677987B (en) | Display panel and display device | |
| KR102425385B1 (en) | Touch type display device | |
| CN111367438B (en) | Display panel and display device | |
| US10852869B2 (en) | Narrow border touch display apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |