CN112631448A - Touch control display panel - Google Patents
Touch control display panel Download PDFInfo
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- CN112631448A CN112631448A CN201910949734.7A CN201910949734A CN112631448A CN 112631448 A CN112631448 A CN 112631448A CN 201910949734 A CN201910949734 A CN 201910949734A CN 112631448 A CN112631448 A CN 112631448A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a touch display panel, which comprises a touch sensing line structure and a touch sensing electrode. The touch sensing line structure is located in a display area of the touch display panel and comprises a first metal line and a second metal line, wherein the first metal line is partially overlapped with the second metal line in a vertical projection direction of the touch display panel, and the first metal line is provided with at least one protruding part which is not overlapped with the second metal line in the vertical projection direction of the touch display panel. The touch sensing electrode is located on the touch sensing line structure and contacts with the at least one protrusion of the first metal line and the second metal line through a through hole, and the through hole is completely located in the first metal line in the vertical projection direction of the touch display panel. The touch display panel can reduce the transmission delay distortion of the touch sensing signal, thereby improving the touch sensing efficiency and effectively avoiding the display problem.
Description
Technical Field
The invention relates to a touch display panel.
Background
With the progress of electronic product production technology, most mobile display devices, such as smart phones and tablet computers, have a touch operation function, so that users can operate the mobile display devices more conveniently. On the other hand, in the current main touch technology for display devices, the in-cell (in-cell) touch technology integrates the fabrication of touch sensing electrodes into the process of the display panel, so that it has the advantage of reducing the thickness of the display panel. However, in the design of the embedded touch display panel, the influence of the design of the touch sensing signal line on the display and the touch sensing needs to be considered. If the touch sensing signal lines are not well designed, the touch sensing problem is not only caused, but also the display problem such as the cross-striation phenomenon is caused.
Disclosure of Invention
An objective of the present invention is to provide a touch display panel, which can reduce the impedance of a touch sensing line structure to reduce the transmission delay distortion of a touch sensing signal, thereby improving the touch sensing performance and effectively avoiding the display problem.
In accordance with the above objectives, the present invention provides a touch display panel, which includes a touch sensing line structure and a touch sensing electrode. The touch sensing line structure is located in a display area of the touch display panel and comprises a first metal line and a second metal line, wherein the first metal line is partially overlapped with the second metal line in a vertical projection direction of the touch display panel, and the first metal line is provided with at least one protruding part which is not overlapped with the second metal line in the vertical projection direction of the touch display panel. The touch sensing electrode is located on the touch sensing line structure and contacts with the at least one protrusion of the first metal line and the second metal line through a through hole, and the through hole is completely located in the first metal line in the vertical projection direction of the touch display panel.
According to an embodiment of the present invention, the touch display panel further includes a pixel unit located at one side of the touch sensing line structure and including a thin film transistor and a pixel electrode.
According to another embodiment of the present invention, the pixel electrode is located above the touch sensing electrode.
According to another embodiment of the present invention, the pixel electrode is located below the touch sensing electrode.
According to another embodiment of the present invention, the thin film transistor and the through hole are respectively located at two adjacent corners of the pixel unit.
According to another embodiment of the present invention, the touch sensing line structure extends from the display area of the touch display panel to the peripheral area of the touch display panel, and the first metal line and the third metal line are electrically connected to each other through a bridge structure in the peripheral area of the touch display panel.
According to another embodiment of the present invention, the touch sensing electrode and the bridging structure comprise the same transparent conductive material.
According to the aforementioned object, the present invention further provides a touch display panel, which includes a first metal line, a first insulating layer, a second metal line, a second insulating layer and a touch sensing electrode. The first metal wire is located in a display area of the touch display panel and is provided with at least one protruding part. The first insulating layer is located on the first metal line and provided with a first through hole, and the first through hole is completely located in the first metal line in the vertical projection direction of the touch display panel. The second metal wire is located on the first insulating layer and partially overlaps the first metal wire in the vertical projection direction of the touch display panel but does not overlap the at least one protruding portion. The second insulating layer is located on the first insulating layer and the second metal line and is provided with a second through hole. The touch sensing electrode is located on the second insulating layer and contacts the at least one protrusion of the first metal wire and the second metal wire through the first through hole and the second through hole.
According to an embodiment of the present invention, a thickness of the second insulating layer is greater than a thickness of the first insulating layer.
According to another embodiment of the present invention, the first metal line extends from the display area of the touch display panel to the peripheral area of the touch display panel, and the touch display panel further includes a third metal line and a bridging structure. The third metal wire is located in the peripheral area of the touch display panel. The bridging structure is located in the peripheral area of the touch display panel and bridges the first metal line and the third metal line, so that the first metal line and the third metal line are electrically connected with each other.
The touch display device has the advantages that the touch sensing line structure is formed by connecting the upper layer of metal lines and the lower layer of metal lines in parallel, so that the impedance value of the touch sensing line structure can be reduced, the transmission delay distortion of the touch sensing signal can be reduced, the touch sensing efficiency can be improved, and the display problem can be effectively avoided. In addition, in the touch display device of the invention, only one photomask is used for etching process, so that the touch sensing electrode and the upper and lower metal wires of the touch sensing line structure can be electrically connected with each other, and the production cost can be reduced.
Drawings
For a more complete understanding of the embodiments and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a touch display device according to some embodiments of the invention;
FIG. 2A is an example of a touch sensing line structure of the touch display panel of FIG. 1;
FIG. 2B is a cross-sectional view of the touch sensing line structure shown in FIG. 2A;
FIG. 3 is a diagram illustrating an example of a pixel unit and its peripheral traces according to an embodiment of the present invention;
FIG. 4A is another example of a touch sensing line structure of the touch display panel of FIG. 1;
FIG. 4B is a cross-sectional view of the touch sensing line structure shown in FIG. 4A;
FIG. 5A is a cross-sectional view of an active device array substrate of the LCD panel of FIG. 1;
FIG. 5B is an example of a cross-sectional view of a bridge structure of the LCD panel of FIG. 1; and
fig. 6 is an example of a cross-sectional view of an active device array substrate structure of the liquid crystal display panel of fig. 1.
Detailed Description
Embodiments of the invention are discussed in detail below. It should be appreciated, however, that the embodiments provide many applicable concepts that can be embodied in a wide variety of specific contexts. The embodiments discussed and disclosed are merely illustrative and are not intended to limit the scope of the invention.
It will be understood that, although the terms "first," "second," "third," …, etc. may be used herein to describe various elements, components, regions and/or sections, these elements, components, regions and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region and/or section from another element, component, region and/or section.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the claims. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the spatially relative terms are used to describe various orientations of the elements in use or operation and are not intended to be limited to the orientations shown in the figures. Elements may also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted in a similar manner.
As used herein, the term "coupled" may mean that two or more elements are in direct physical or electrical contact with each other, or in indirect physical or electrical contact with each other, and "coupled" may mean that two or more elements are in operation or act with each other.
Referring to fig. 1, fig. 1 is a schematic view of a touch display device 100 according to some embodiments of the invention. The touch display device 100 includes a touch display panel 110 and a touch driving circuit 120. The touch display panel 110 may be a liquid crystal display panel such as a Twisted Nematic (TN) type, an in-plane switching (IPS) type, an FFS (fringe-field switching) type, or a VA (vertical alignment) type, but is not limited thereto. In addition, the touch display panel 110 has an active area 110A and a peripheral area 110B, the active area 110 has a plurality of pixel units (not shown in fig. 1) and touch sensing electrodes TE disposed on the substrate S, and the peripheral area 110B has a wiring for respectively providing a gate driving signal, a data driving signal and a touch sensing signal to the pixel units and the touch sensing electrodes TE, so that the pixel units display corresponding gray scales at specific time and the touch sensing electrodes perform touch sensing at specific time. In addition, the touch display panel 110 may be an in-cell (in-cell) touch display panel, that is, a common electrode (common electrode) in the touch display panel 110 also serves as a touch sensing electrode of the touch display panel 110. The gate driving signal, the data driving signal and the touch sensing signal can be provided by a gate driving circuit (not shown in fig. 1), a data driving circuit (not shown in fig. 1) and a touch sensing circuit 120, respectively.
The touch display panel 110 may be a System On Glass (SOG) panel, that is, the gate driving circuit, the data driving circuit and the touch sensing circuit 120 may be formed on the substrate S of the touch display panel 110. In this way, the electronic devices in the gate driving circuit, the data driving circuit and the touch sensing circuit 120 and the electronic devices in the active region 110A (such as, but not limited to, the thin film transistors, the pixel electrodes, the touch sensing electrodes TE, etc.) can be fabricated by the same process. As shown in fig. 1, the touch driving circuit 120 is fabricated on the substrate S and electrically connected to the touch sensing line SL through a wiring, and then the touch sensing line SL sends a touch sensing signal to the touch sensing electrode TE through the contact C. It should be noted that although fig. 1 shows that the touch driving circuit 120 is disposed at the lower side of the active region 110A, the invention is not limited thereto. The touch driving circuit 120 may also be disposed on the left, right, or lower side of the active region 110A according to the position of the peripheral region 110B. In addition, in the present embodiment, the touch sensing line SL is parallel to the direction X. In other embodiments, the touch sensing line SL may be parallel to the direction Y.
In other embodiments, the gate driving circuit, the data driving circuit and/or the touch sensing circuit 120 may be respectively disposed in chips, and the chips may be bonded to pads disposed on the substrate S by Chip On Glass (COG), Tape Automated Bonding (TAB), Chip On Film (COF), etc. to respectively provide the gate driving circuit, the data driving circuit and/or the touch sensing circuit to the electronic devices in the active region 110A of the touch display panel 110. In particular, in some embodiments, the gate driving circuit, the data driving circuit and the touch sensing circuit 120 can be integrated into a Touch and Display Driver Integration (TDDI) chip.
It should be noted that the configuration of the touch sensing electrode TE, the touch sensing line SL and the contact C shown in fig. 1 is only an example, and is not intended to limit the scope of the present invention. For example, each touch sensing electrode TE can be electrically connected to the touch sensing line SL through a plurality of contacts C, and the number of the touch sensing electrodes TE and the touch sensing line SL can be determined according to the size of the active area 110A, the driving capability of the touch sensing circuit 120, the touch resolution requirement, and other conditions.
Fig. 2A is an example of a touch sensing line structure SL of the touch display panel 110. As shown in fig. 2A, the touch sensing line structure SL includes a first metal line ML1 and a second metal line ML 2. In the vertical projection direction of the touch display panel 110, the first metal line ML1 and the second metal line ML2 partially overlap. The first metal line ML1 further has a protrusion P, but the protrusion P does not overlap with the second metal line ML2 in the vertical projection direction of the touch display panel 110. In addition, the width of the first metal line ML1 may be slightly greater than the width of the second metal line ML2, or the width of the first metal line ML1 may be equal to the width of the second metal line ML 2. The through hole TH is completely located in the first metal line ML1 in the vertical projection direction of the touch display panel 110, and overlaps the protrusion P of the first metal line ML1 and the second metal line ML 2.
Fig. 2B is a transverse cross-sectional view of the touch sensing line structure SL shown in fig. 2A. As shown in fig. 2B, the second metal line ML2 is located above the first metal line ML1, and the touch sensing electrode TE is located above the first metal line ML1 and the second metal line ML2 (i.e., above the touch sensing line structure SL). The touch sensing electrode TE passes through the through hole THA to contact the second metal line ML2, and passes through the through hole THB to contact the protrusion P of the first metal line ML1, so that the first metal line ML1 and the second metal line ML2 are electrically connected to each other. The combination of the through holes THA and THB in fig. 2B is the through holes TH in fig. 2A, so that the through holes THA and THB are completely located in the first metal lines ML1 in the vertical projection direction of the touch display panel 110. In some embodiments, the first metal line ML1 and the second metal line ML2 are electrically connected to each other through a plurality of through holes TH. In this way, the first metal line ML1 and the second metal line ML2 are connected in parallel, and the resistance of the touch sensing line structure SL is reduced.
In the fabrication of the touch sensing line structure SL, first, the first metal line ML1, the first insulating layer PV1, the second metal line ML2, and the second insulating layer PV2 are sequentially formed on the substrate S and the gate insulating layer GI, then, a portion of the second insulating layer PV2 is removed by an etching process to form the through hole THA, and then, a portion of the first insulating layer PV1 is removed by an etching process to form the through hole THB, and finally, the touch sensing electrode TE is formed on the first metal line ML1, the first insulating layer PV1, the second metal line ML2, the second insulating layer PV2, the through holes THA, and the through hole THB. In the etching process, the second metal lines ML2 also serve as an etching barrier layer, so that after etching to the bottom of the second insulation layer PV2, the portion of the first insulation layer PV1 not covered by the second metal lines ML2 is continuously etched until the protruding portions P of the first metal lines ML1 are exposed. The thickness of the second insulation layer PV2 may be increased, that is, the thickness of the second insulation layer PV2 may be greater than the thickness of the first insulation layer PV1, so as to reduce the capacitance between the touch sensing electrode TE and the pixel electrode PE.
For convenience of illustration, fig. 2A and 2B only illustrate a portion of a single touch sensing line structure, and those skilled in the art can directly understand that other touch sensing line structures can be similar to those illustrated in fig. 2A and 2B.
Fig. 3 is a diagram illustrating an example of a pixel unit PX and its peripheral traces according to an embodiment of the invention. As shown in fig. 3, the pixel unit PX is located between two adjacent data lines DL and on the left side of the touch sensing line structure SL in the X-axis direction, and located between two adjacent gate lines GL in the Y-axis direction. The pixel unit PX includes a thin film transistor TFT and a pixel electrode PE, wherein a source and a gate of the thin film transistor TFT are coupled to the corresponding data line DL and the gate line GL, respectively, and the pixel electrode PE is coupled to a drain of the thin film transistor TFT. The pixel electrode PE and the touch sensing electrode TE belong to different layers. Depending on the type of the touch display panel 110, the pixel electrode PE may be located above the touch sensing electrode TE or below the touch sensing electrode TE. In addition, the TFT and the through hole TH may be respectively located at two adjacent corners of the pixel unit PX. As shown in fig. 3, the thin film transistor TFT is located at a lower left corner of the pixel unit PX, and the projection P and the through hole TH of the first metal line ML1 are located at a lower right corner of the pixel unit PX. In various embodiments, depending on the arrangement of the pixel electrode PE and the touch sensing electrode TE of the pixel unit PX, and the arrangement of the data line DL, the gate line GL and the touch sensing line structure SL, in order to increase the light transmittance of the pixel unit PX, the thin film transistor TFT, the protrusion P of the first metal line ML1 and the through hole TH may also be arranged at other positions (for example, at the upper left corner and the upper right corner of the pixel unit PX, respectively) of the pixel unit PX, which is not limited to the arrangement position shown in fig. 3.
Fig. 4A is another example of the touch sensing line structure SL of the touch display panel 110. As shown in fig. 4A, the touch sensing line structure SL includes a first metal line ML1 and a second metal line ML 2. In the vertical projection direction of the touch display panel 110, the first metal line ML1 and the second metal line ML2 partially overlap. Compared to the touch sensing line structure SL of fig. 2A, in the touch sensing line structure SL of fig. 4A, the first metal line ML1 further has protruding portions P1 and P2, and the protruding portions P1 and P2 are respectively located on the left and right sides of the second metal line ML2 in the vertical projection direction of the touch display panel 110 and do not overlap with the second metal line ML 2. In addition, the width of the first metal line ML1 may be slightly greater than the width of the second metal line ML2, or the width of the first metal line ML1 may be equal to the width of the second metal line ML 2. The through hole TH overlaps the protrusions P1 and P2 of the first metal line ML1 and the second metal line ML2 in the vertical projection direction of the touch display panel 110.
Fig. 4B is a transverse cross-sectional view of the touch sensing line structure SL shown in fig. 4A. As shown in fig. 4B, the second metal line ML2 is located above the first metal line ML1, and the touch sensing electrode TE is located above the first metal line ML1 and the second metal line ML2 (i.e., above the touch sensing line structure SL). The touch sensing electrode TE passes through the through hole THA to contact the second metal line ML2, and passes through the through hole THB to contact the protrusions P1, P2 of the first metal line ML1, so that the first metal line ML1 and the second metal line ML2 are electrically connected to each other. The combination of the through holes THA and THB of fig. 4B is the through hole TH of fig. 4A, so that the through holes THA and THB are completely located in the first metal lines ML1 in the vertical projection direction of the touch display panel 110.
In the fabrication of the touch sensing line structure SL, first, the first metal line ML1, the first insulating layer PV1, the second metal line ML2, and the second insulating layer PV2 are sequentially formed on the substrate S and the gate insulating layer GI, then, a portion of the second insulating layer PV2 is removed by an etching process to form the through hole THA, and then, a portion of the first insulating layer PV1 is removed by an etching process to form the through hole THB, and finally, the touch sensing electrode TE is formed on the first metal line ML1, the first insulating layer PV1, the second metal line ML2, the second insulating layer PV2, the through holes THA, and the through hole THB. The second metal lines ML2 also serve as an etch barrier, so that after etching to the bottom of the second insulation layer PV2, the portions of the first insulation layer PV1 not covered by the second metal lines ML2 continue to be etched until the protrusions P1, P2 of the first metal lines ML1 are exposed.
Fig. 5A is an example of a cross-sectional view of an active device array substrate structure of the lcd panel 100. As shown in fig. 5A, in the display region of the touch display panel, the gate electrode GE is located on the substrate S, and the gate insulating layer GI, the semiconductor layer SM1 and the doped semiconductor layer SM2 are sequentially located on the substrate S and the gate electrode GE. The source electrode SE and the drain electrode DE are located on the gate insulating layer GI, the semiconductor layer SM1, and the doped semiconductor layer SM2, and constitute the thin film transistor TFT with GE, the semiconductor layer SM1, the doped semiconductor layer SM2, and a part of the gate insulating layer GI. The first metal line ML1 is located on the gate insulating layer GI, and belongs to the same metal layer as the source electrode SE and the drain electrode DE.
The first insulating layer PV1 is positioned on the source electrode SE, the drain electrode DE, the semiconductor layer SM1, the doped semiconductor layer SM2, and the first metal line ML1, and the pixel electrode PX is positioned on the first insulating layer PV1 and contacts the drain electrode DE through a penetration hole in the first insulating layer PV 1. The second insulation layer PV2 is on the first insulation layer PV1 and the pixel electrode PX, and the touch sensing electrode TE is on the second insulation layer PV2 and contacts the first metal line ML1 and the second metal line ML2 through the through holes in the first insulation layer PV1 and the second insulation layer PV2, so that the touch sensing electrode TE, the first metal line ML1, and the second metal line ML2 are electrically connected to each other.
In the structure shown in fig. 5A, the substrate S may be made of glass, quartz, ceramic, a combination thereof, or other similar insulating materials. The materials of the first metal line ML1, the second metal line ML2, the gate electrode GE, the source electrode SE, and the drain electrode DE may include metal elements such as chromium, tungsten, tantalum, titanium, molybdenum, aluminum, copper, and the like, or other similar elements, or alloys or compounds formed by any combination of the above metal elements, and the like, but are not limited thereto. The material of the first and second insulating layers PV1 and PV2 may be, for example, silicon oxide, silicon nitride, silicon oxynitride, or other suitable dielectric material. The material of the semiconductor layer SM1 may be amorphous silicon, single crystal silicon, polycrystalline silicon or other similar materials, and the material of the doped semiconductor layer SM2 may correspond to doped amorphous silicon, doped single crystal silicon, doped polycrystalline silicon or other similar materials. The material of the pixel electrode PX and the touch sensing electrode TE may be a transparent conductive material such as indium tin oxide and indium zinc oxide, but is not limited thereto.
Fig. 5B is an example of a cross-sectional view of the bridge structure of the liquid crystal display panel 100. In fig. 5B, the gate insulating layer GI, the first insulating layer PV1, and the second insulating layer PV2 all extend from the liquid crystal display panel 100 to the peripheral region, the first metal layer M1 is located on the substrate S, the second metal layer M2 is located above the first metal layer M1, the bridging structure BR is located above the first metal layer M1 and the second metal layer M2 and contacts the first metal layer M1 and the second metal layer M2 through the through holes TH1 and TH2, respectively, and the gate insulating layer GI, the first insulating layer PV1, and the second insulating layer PV2 cover the first metal layer M1, the second metal layer M2, and the bridging structure BR, respectively. The first metal layer M1 may be a metal line, and the like, and it belongs to the same metal layer as the gate electrode GE in the display region, and the second metal layer M2 belongs to the same metal layer as the source electrode SE, the drain electrode DE, and the first metal line ML1 in the display region. In some embodiments, the second metal layer M2 is a portion of the first metal line ML1 extending from the display region to the peripheral region. The bridging structure BR is made of a transparent conductive material, and belongs to the same transparent conductive layer as the pixel electrode PE or the touch sensing electrode TE in the display area.
Fig. 6 is another example of a cross-sectional view of an active device array substrate structure of the lcd panel 100. The difference between the active device array substrate structures shown in fig. 6 and 5A is that, in the fabrication of the active device array substrate structure shown in fig. 6, the pixel electrode PE is formed first, and then the source electrode SE, the drain electrode DE and the first metal line ML1 are formed, such that the drain electrode DE is stacked on the pixel electrode PE. Technical features of other elements in fig. 6 may be the same as those in the example of fig. 5A, so that the related description is please refer to the previous paragraphs, which are not repeated herein.
In summary, according to the embodiments of the invention, the touch sensing line structure is formed by connecting the upper and lower layers of metal lines in parallel, so that the impedance value of the touch sensing line structure can be reduced, the transmission delay distortion of the touch sensing signal can be reduced, the touch sensing efficiency can be further improved, and the display problem can be effectively avoided. In addition, the embodiment of the invention only needs to use one photomask to carry out the etching process, so that the touch sensing electrode and the upper and lower metal wires of the touch sensing line structure can be electrically connected with each other, and the production cost can be reduced.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A touch display panel, comprising:
the touch control display panel comprises a touch control sensing line structure, a first touch control sensing line structure and a second touch control sensing line structure, wherein the touch control sensing line structure is positioned in a display area of the touch control display panel and comprises a first metal line and a second metal line, the first metal line is partially overlapped with the second metal line in a vertical projection direction of the touch control display panel, and the first metal line is provided with at least one protruding part which is not overlapped with the second metal line in the vertical projection direction; and
and the touch sensing electrode is positioned on the touch sensing line structure, the touch sensing electrode contacts the at least one convex part of the first metal line and the second metal line through a through hole, and the through hole is completely positioned in the first metal line in the vertical projection direction.
2. The touch display panel of claim 1, further comprising:
and the pixel unit is positioned on one side of the touch sensing line structure and comprises a thin film transistor and a pixel electrode.
3. The touch display panel of claim 2, wherein the pixel electrode is located above the touch sensing electrode.
4. The touch display panel of claim 2, wherein the pixel electrode is located below the touch sensing electrode.
5. The touch display panel of claim 2, wherein the thin film transistor and the through hole are respectively located at two adjacent corners of the pixel unit.
6. The touch display panel according to claim 1, wherein the touch sensing line structure extends from the display area of the touch display panel to the peripheral area of the touch display panel, and the first metal line and the third metal line are electrically connected to each other through a bridge structure in the peripheral area of the touch display panel.
7. The touch display panel of claim 6, wherein the touch sensing electrodes and the bridging structure comprise the same transparent conductive material.
8. A touch display panel, comprising:
the first metal wire is positioned in a display area of the touch display panel and is provided with at least one protruding part;
the first insulating layer is positioned on the first metal wire and provided with a first through hole, and the first through hole is completely positioned in the first metal wire in the vertical projection direction of the touch display panel;
a second metal line on the first insulating layer, the second metal line partially overlapping the first metal line in the perpendicular projection direction but not overlapping the at least one protrusion;
a second insulating layer on the first insulating layer and the second metal line, the second insulating layer having a second through hole;
and the touch sensing electrode is positioned on the second insulating layer and contacts the at least one protruding part of the first metal wire and the second metal wire through the first through hole and the second through hole.
9. The touch display panel according to claim 8, wherein a thickness of the second insulating layer is greater than a thickness of the first insulating layer.
10. The touch display panel according to claim 8, wherein the first metal line extends from a display area of the touch display panel to a peripheral area of the touch display panel, and the touch display panel further comprises:
the third metal wire is positioned in the peripheral area of the touch display panel; and
and the bridging structure is positioned in the peripheral area of the touch display panel and bridges the first metal wire and the third metal wire, so that the first metal wire and the third metal wire are electrically connected with each other.
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| CN201910949734.7A CN112631448A (en) | 2019-10-08 | 2019-10-08 | Touch control display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910949734.7A CN112631448A (en) | 2019-10-08 | 2019-10-08 | Touch control display panel |
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