CN112162650B - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
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- CN112162650B CN112162650B CN202010809177.1A CN202010809177A CN112162650B CN 112162650 B CN112162650 B CN 112162650B CN 202010809177 A CN202010809177 A CN 202010809177A CN 112162650 B CN112162650 B CN 112162650B
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229920001621 AMOLED Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 206010049155 Visual brightness Diseases 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- XXLJGBGJDROPKW-UHFFFAOYSA-N antimony;oxotin Chemical compound [Sb].[Sn]=O XXLJGBGJDROPKW-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
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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)
- Position Input By Displaying (AREA)
Abstract
The application provides a touch panel, include: the first touch electrode extends along the first direction, the first touch electrode comprises a plurality of first touch electrode blocks, and the first touch electrode blocks are electrically connected through the body connecting part; the second touch electrode extends along the second direction, the second touch electrode comprises a plurality of second touch electrode blocks, adjacent second touch electrode blocks are electrically connected through functional bridges, the body connecting part is positioned between the adjacent second touch electrode blocks, and the functional bridges span the body connecting part; the second direction intersects the first direction; the virtual electrode is positioned between the first touch electrode block and the second touch electrode block, and a virtual bridge is arranged on the virtual electrode. Through touch panel and display device that this application provided, can't protect function bridging to current structure not be by static to hit the wound, the static from the face can be shared to the structure of this application to alleviate and avoid static to hit the function bridging even, thereby avoid the risk that touch panel became invalid.
Description
Technical Field
The application belongs to the technical field of touch panels, and particularly relates to a touch panel with an electrostatic protection function and a display device.
Background
With the continuous development of display technology, the requirements of consumers on display panels are continuously improved, various display panel layers are not assembled, rapid development is achieved, such as a liquid crystal display panel, an organic light emitting display panel and the like, and on the basis, display technologies such as 3D display, touch display technology, curved surface display, ultrahigh resolution display and peep-proof display are continuously developed to meet the requirements of consumers. The touch function is one of the essential functions of the display screen, and the realization mode and structure of the touch function are various, such as self-capacitance type, mutual capacitance type and other touch modes, and internal type, external type or external type and other touch structures. The Active Matrix Organic Light Emitting Diode (AMOLED) screen has technical advantages in wide color gamut, high contrast, ultra-thin design, outdoor readability, energy consumption and other aspects, and the touch screen formed by the AMOLED screen comprises an active matrix organic light emitting diode screen, a touch panel (touch panel) and outer protective glass.
In the process of manufacturing the touch panel, due to the existence of static electricity, the conductors are easily discharged mutually, so that the touch panel is damaged, fig. 1 shows that a conventional function bridge is erected between the touch electrodes, the conventional function bridge is easily damaged by static electricity to cause the touch panel to fail, or after various tests, the bridge damage is deteriorated to cause the touch panel to fail, so that the yield of the touch panel is greatly affected.
Disclosure of Invention
In view of the foregoing, embodiments of the present application provide a touch panel for solving at least one of the problems of the prior art.
In a first aspect, embodiments of the present application provide a touch panel, including: the first touch electrode extends along a first direction, and comprises a plurality of first touch electrode blocks which are electrically connected through a body connecting part; the second touch electrode extends along the second direction, the second touch electrode comprises a plurality of second touch electrode blocks, adjacent second touch electrode blocks are electrically connected through a functional bridge, the body connecting part is positioned between the adjacent second touch electrode blocks, and the functional bridge spans the body connecting part; the second direction intersects the first direction; the virtual electrode is positioned between the first touch electrode block and the second touch electrode block, and a virtual bridge is arranged on the virtual electrode.
In a second aspect, an embodiment of the present application further provides a display device, including the touch panel provided by the present application.
Compared with the prior art, the touch panel and the display device provided by the application at least realize the following beneficial effects: the structure can share static electricity from the surface, so that the static electricity damage function bridging can be lightened or even avoided, and the risk of failure of the touch panel is avoided.
Of course, it is not necessary for any of the products of the present application to be specifically required to achieve all of the technical effects described above at the same time.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 shows a prior art functional bridge diagram for electrostatic discharge;
fig. 2A is a schematic structural view of a touch panel according to an embodiment of the present application;
fig. 2B is a schematic front view of the touch panel of fig. 1 along the Z direction according to an embodiment of the present application;
fig. 3 is a schematic structural view of a touch panel according to an embodiment of the present application, having positions of functional bridges and virtual bridges;
FIG. 4 is a schematic diagram of a virtual bridge structure according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a functional bridge according to an embodiment of the present application;
FIG. 6A is a schematic view of the structure of FIG. 3 taken along the "A-A" direction in accordance with an embodiment of the present application;
FIG. 6B is a schematic view of the structure of FIG. 3 taken along the "B-B" direction in accordance with an embodiment of the present application;
FIG. 6C is another schematic structural view of the cross-section along the "B-B" direction of FIG. 3 in accordance with an embodiment of the present application;
FIG. 7A is a schematic view of the structure of FIG. 3 taken along the "A-A" direction in accordance with another embodiment of the present application;
FIG. 7B is a schematic view of the structure of FIG. 3 taken along the direction "B-B" in accordance with another embodiment of the present application;
FIG. 7C is another schematic view of the structure of FIG. 3 taken along the direction "B-B" in accordance with another embodiment of the present application;
fig. 8 is a schematic structural view of a touch panel according to another embodiment of the present application with positions of functional bridges and virtual bridges;
fig. 9 is a schematic structural view of a touch panel having a functional bridge and a virtual bridge according to still another embodiment of the present application;
fig. 10 is a schematic structural view of a touch panel having a functional bridge and a virtual bridge according to still another embodiment of the present application;
FIG. 11 is a schematic view of a touch panel with functional bridge and virtual bridge locations according to yet another embodiment of the present application;
FIG. 12 is a schematic diagram of a virtual bridge structure according to another embodiment of the present application;
FIG. 13 is another elevational structural schematic view along the Z-direction of the touch panel of FIG. 1 according to an embodiment of the present application;
FIG. 14 is a schematic view of the structure of FIG. 13 taken along the "C-C" direction in accordance with an embodiment of the present application;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
The application provides a touch panel 100, the touch panel 100 includes a first substrate 20, a second substrate 30, a gate line G, a data line D, a pixel unit P, a first touch electrode 42, a second touch electrode 44, and a plurality of functional bridges 46. The second substrate 30 is disposed opposite to the first substrate 20, and the data line D and the gate line G intersect in an insulating manner. The pixel units P are arranged in an array, and the gate lines G, the data lines D, and the pixel units P are all located between the first substrate 20 and the second substrate 30. The gate line G, the data line D, and the pixel unit P may be formed at a side of the first substrate 20 adjacent to the second substrate 30.
Referring to fig. 2A and 2B, the display panel includes a first touch electrode 42 extending along an X direction, the first touch electrode 42 including a plurality of first touch electrode blocks in the X direction, each of the first touch electrode blocks being electrically connected through a body connection part 43, the first touch electrodes 42 extending along the X direction being arranged along a Y direction. The touch panel 100 further includes a second touch electrode 44 extending along the Y direction, where the second touch electrode 44 includes a plurality of second touch electrode blocks along the Y direction, and the functional bridge 46 connects two adjacent second touch electrode blocks across the body connection portion 43, and the second touch electrodes 44 extending along the Y direction are arranged along the X direction. The functional bridge is used for electrically connecting the adjacent second touch electrode blocks to form strip electrodes, so that two groups of crossed strip electrodes form mutual capacitance type touch.
In an alternative embodiment, the arrangement of the pixel units is not limited to the RGB standard arrangement mode, the arrangement of the pixel units may also adopt a mode that red and blue sub-pixel points are obliquely arranged in a straight line at an angle of 45 degrees, and meanwhile, green pixel points are arranged horizontally and vertically. Therefore, the number of the sub-pixels can be reduced, the effect of simulating high resolution with low resolution is achieved, the visual brightness is higher under the same brightness, and the cost is lower.
In reliability test or in-service use, static exists in the touch panel, and because the resistance of function bridging is lower, and the width is narrower, can lead to the resistance increase of function bridging under the condition that the function bridging was hit by static for touch precision decline or touch failure, under the condition that the function bridging was hit by static, can lead to the touch electrode disconnection, causes the touch to break, makes touch failure. Therefore, referring to fig. 2B, in this application, in order to prevent the functional bridge from being damaged or broken, a dummy electrode 47 is further disposed between the first touch electrode 42 and the second touch electrode 44, and the dummy electrode 47 has a dummy bridge 56 (not shown) thereon for providing a discharging function simultaneously with the functional bridge 46, or for prioritizing the functional bridge 46 to provide the discharging function so as to prevent the functional bridge 46 from being damaged by static electricity, or for providing the discharging function after the functional bridge 46 is damaged by static electricity, so as to prevent the touch panel from being damaged by the functional bridge after various tests.
Referring to fig. 2B, the display panel includes a touch chip 130, the touch chip 130 is connected to a first touch electrode 42 through a first touch lead 110, the touch chip 130 is connected to a second touch electrode 44 through a second touch lead 120, the first touch electrode 42 may be a touch detection electrode for receiving a touch detection signal, and the second touch electrode 44 may be a touch driving electrode for providing a touch driving signal; the display panel may further include a display driving chip 140, where the display driving chip 140 is configured to provide display signals for the display panel, and in other implementations of the present embodiment, the touch chip 130 and the display driving chip 140 may be integrated into the same chip, so as to further save a frame area of the display panel. The bezel 210 is disposed around the display area 220.
The area of the dashed box in fig. 2B is enlarged as shown in fig. 3. The first touch electrode 42 extends along the X direction, and includes a plurality of first touch electrode blocks in the X direction, each of which is electrically connected through the body connection part 43. The second touch electrode 44 extends along the Y direction, and includes a plurality of second touch electrode blocks in the Y direction, the functional bridge 46 spans the body connection portion 43 to connect two adjacent second touch electrode blocks, a virtual electrode 47 is provided between the first touch electrode block and the second touch electrode block, and a virtual bridge 56 is provided on the virtual electrode 47. In fig. 3, only one dummy electrode 47 is shown, however, the number of dummy electrodes 47 is not limited. According to the requirement of electrostatic protection, in fig. 3, four positions forming central symmetry with the centers of the functional bridge 46 and the body connection portion 43 may have one, two, three or four virtual electrodes, and the more the number of virtual electrodes, the closer the virtual electrodes are to the functional bridge 46, the easier the functional bridge 46 is to share static electricity, the easier the functional bridge 46 is to prioritize the discharge of static electricity, so as to achieve a better electrostatic protection effect and avoid damage to the functional bridge 46.
The virtual electrode 47 in fig. 3 is partially enlarged, see fig. 4. Fig. 4 shows a specific structure of the dummy electrode, the dummy electrode 47 includes a first dummy electrode 471, a third dummy electrode 473 and a second dummy electrode 472 separated by two slits having widths D3 and D4, respectively, and the dummy bridge 56 spans the third dummy electrode and is electrically connected to the first dummy electrode and the second dummy electrode, whereby the dummy bridge 56 has a structure similar to the functional bridge 46 in that three electrode portions are separated by two slits, and the dummy bridge 56 or the functional bridge 46 spans the middle electrode portion and is bridged on the electrodes on both sides. Therefore, when static electricity in the touch display panel is accumulated between the electrodes, the virtual bridge 56 is preferably adopted for discharging, so that the touch panel is prevented from being damaged. In the present application, the virtual bridge 56 has a different position and detail structure from those of the functional bridge 46, so that in the case of static electricity accumulation, the virtual bridge 56 is preferentially used for electrostatic discharge, which not only protects the touch panel from electrostatic damage, but also protects the functional bridge 46 from electrostatic damage. For example, the virtual bridge is made of a material with lower resistivity, for example, the virtual bridge is arranged at a position with more static electricity accumulation, for example, the virtual bridge is narrower than the functional bridge in width and/or longer than the functional bridge in length and/or the tip is arranged with a larger curvature, so that static electricity dispersed around in the touch panel is absorbed onto the virtual bridge, and the static electricity is shared for the functional bridge. The details are as follows.
The dashed box near the center functional bridge 46 of fig. 3 is enlarged, see fig. 5. Two notches with the widths of D1 and D2 are respectively arranged between the adjacent second touch electrode blocks of the second touch electrode 44 and the body connecting part 43, wherein D1 and D2 are equal or unequal according to the process requirements. For the slit widths D3, D4 in fig. 4, optionally, the widths D3 and D2 are equal, the widths D4 and D1 are equal, and optionally, the widths D3, D4 are different from the widths D1, D2, but the ratio of the widths D3, D4 to the width W2 of the virtual bridge 56 is the same as the ratio of the widths D1, D2 to the width W1 of the functional bridge 46, so that the virtual bridge is smaller than the functional bridge as a whole, thereby realizing the effect that the virtual bridge 56 absorbs static electricity in preference to the functional bridge 46 to release static electricity. Alternatively, the widths of D3 and D4 are different from the widths of D1 and D2, and the widths of D3 and D4 are smaller than the widths of D1 and D2, so that the effect that the virtual bridge 56 discharges static electricity in preference to the functional bridge 46 can be achieved when less charges accumulate.
Fig. 4 and 5 are top views of the virtual bridge and the functional bridge in the Z direction. Optionally, the virtual bridge 56 and the functional bridge 46 are rectangular, in length and width, the length L2 of the virtual bridge 56 is greater than the length L1 of the functional bridge 46, and the width W2 of the virtual bridge 56 is less than the width W1 of the functional bridge 46, so that the virtual bridge 56 is preferentially used for electrostatic discharge under the condition of static electricity accumulation, thereby protecting the touch panel and the functional bridge 46 from electrostatic damage. Alternatively, the virtual bridge may be a spindle structure with two thin ends and a thick middle, according to the principle of tip discharge, the sharper the tip of the conductor, the larger the curvature, the higher the surface charge density, the stronger the field strength near the conductor, and compared with the part with small curvature, the part with large curvature is the tip, and due to electrostatic induction, the opposite charges are induced at the tip, so that the virtual bridge is discharged in preference to the functional bridge.
In an alternative embodiment, the virtual bridge 56 is a metal bridge, and the resistivity of the metal bridge is lower than that of the touch signal line of the touch panel, for example, a metal with high resistivity such as gold, silver, etc. is used, so that the metal bridge is beneficial to preferentially absorbing and releasing static electricity, and the touch signal line and the wiring terminal are protected from static electricity damage.
In an alternative embodiment, the first virtual electrode 471, the third virtual electrode 473 and the second virtual electrode 472 use Indium Tin Oxide (ITO), wherein indium tin oxide is a nano-oxide particle having a semiconductor property, has a higher conductive property than a conventional oxide at room temperature, and since indium tin oxide has a high resistivity, the touch signal is not shielded by using indium tin oxide as the virtual electrode, thereby solving the problem of shielding of the touch signal by the virtual electrode that may occur. In addition, the first, third and second dummy electrodes 471, 473 and 472 may further employ tin antimony oxide (ATO) having higher resistivity than indium tin oxide, thereby achieving a better effect of discharging static electricity.
In fig. 3, a cross-sectional view in A-A direction is shown in fig. 6A, and a cross-sectional view in B-B direction is shown in fig. 6B, wherein the touch panel further includes a substrate 31 and an insulating layer 32.
In fig. 6A, the functional bridge 46 is disposed on one surface of the insulating layer 32, and the second touch electrode 44 and the body connection portion 43 are disposed on the other surface of the insulating layer 32. The insulating layer 32 includes a first via 61 and a second via 62, which respectively correspond to two adjacent second touch electrode blocks of the second touch electrode 42.
The functional bridge 46 is electrically connected to the two second touch electrode blocks through the first via hole 61 and the second via hole 62. The insulating layer 32 prevents the functional bridge 46 from conducting electrical current to other metal layers in the touch panel. The functional bridge 46 has a first protruding portion 71 and a second protruding portion 72, the first protruding portion 71 being shaped and dimensioned to fit the first via 61, and being electrically connected to one of the second touch electrode pads through the first via 61. Similarly, the second protrusion 72 is shaped and sized to fit the second via 62, which is electrically connected to another second touch electrode pad through the second via 62. And bridging between adjacent second touch electrode blocks is realized. In this embodiment, the first protruding portion 71 and the second protruding portion 72 may be integrally formed with the functional bridge 46, so as to electrically connect adjacent second touch electrode blocks.
In fig. 6B, the dummy bridge 56 is disposed on one surface of the insulating layer 32, and the first dummy electrode 471, the third dummy electrode 473, and the second dummy electrode 472 are disposed on the other surface of the insulating layer 32. The insulating layer 32 includes a first via 63 and a second via 64, which correspond to the second dummy electrode 472 and the first dummy electrode 471, respectively.
The dummy bridge 56 is electrically connected to the first dummy electrode 471 and the second dummy electrode 472 through the third via 63 and the fourth via 64, respectively. The insulating layer 32 can prevent the dummy bridge 56 from conducting with other metal layers in the touch panel. The dummy bridge 56 has a third protruding portion 73 and a fourth protruding portion 74, and the third protruding portion 73 is shaped and sized to fit the third via hole 63, and is electrically connected to the first dummy electrode 471 through the third via hole 63. Similarly, the fourth bump 74 is shaped and sized to fit within the fourth via 64 and is electrically connected to the second dummy electrode 472 through the fourth via 64. Further, bridging between virtual electrodes is achieved. In this embodiment, the third protruding portion 73 and the fourth protruding portion 74 may be integrally formed with the virtual bridge 56, so as to realize the electrical connection of the virtual bridge for electrostatic discharge.
In an alternative embodiment, the virtual bridge 56 and the functional bridge 46 are located on the same layer, and the existing film layer of the display panel is not added, so that the thin design of the display panel is facilitated, and the process is simplified.
In fig. 3, a cross-sectional view in A-A direction is shown in fig. 6A, and a cross-sectional view in B-B direction is shown in fig. 6C, wherein the touch panel further includes a substrate 31 and an insulating layer 32. In fig. 6C, the dummy bridge 56 is disposed on one surface of the insulating layer 32, and the first dummy electrode 471, the third dummy electrode 473, and the second dummy electrode 472 are disposed on the other surface of the insulating layer 32. The dummy bridge 56 is spaced apart from the first dummy electrode 471 and the second dummy electrode 472 by the insulating layer 32. When static electricity exists in the touch panel, the insulating layer 32 is broken down, and the static electricity is discharged through the virtual bridge 56.
In an alternative embodiment, the third protruding portion 73 and the fourth protruding portion 74 are not provided, and the dummy bridge 56 is located at a certain distance from both the first dummy electrode 471 and the second dummy electrode 472, and no electrical connection is achieved.
In the embodiment where the virtual bridge and the virtual electrode are not substantially electrically connected, the electrostatic discharge refers to charge transfer caused by the fact that objects having different electrostatic potentials are close to each other or in direct contact with each other, so that the electrostatic discharge may be generated only by sufficiently close distance when there is no electrical connection. Therefore, the electrostatic discharge with instant large current can be realized at one time when the static electricity is accumulated more, and the damage to functional bridging or the damage to the touch panel caused by the excessive instant current is avoided.
In an alternative embodiment, the diameters of the first via hole 61 and the second via hole 62 are respectively R1 and R2, the diameters of R1 and R2 are the same, the diameters of the third via hole 63 and the fourth via hole 64 are respectively R3 and R4, and optionally, the diameters of R3 and R4 are both larger than the diameters of R1 and R2, so that the virtual bridge 56 realizes the electrostatic discharge function in preference to the functional bridge 46 through the larger via hole, thereby protecting the touch panel and protecting the functional bridge 46 from electrostatic damage.
In another embodiment of fig. 3, a cross-sectional view in A-A direction is shown in fig. 7A, and a cross-sectional view in B-B direction is shown in fig. 7B, wherein the touch panel further comprises a substrate 31 and an insulating layer 32.
In fig. 7A, the functional bridge 46 is disposed on one surface of the insulating layer 32, and the second touch electrode 44 and the body connection portion 43 are disposed on the other surface of the insulating layer 32. The insulating layer 32 includes a first via 61 and a second via 62, which respectively correspond to two adjacent second touch electrode blocks of the second touch electrode 42.
The functional bridge 46 is electrically connected to the two second touch electrode blocks through the first via hole 61 and the second via hole 62. The insulating layer 32 prevents the functional bridge 46 from conducting electrical current to other metal layers in the touch panel. The second touch electrode block has a first protruding portion 71 and a second protruding portion 72, and the shape and size of the first protruding portion 71 are adapted to the first via hole 61, and it is electrically connected to the functional bridge 46 through the first via hole 61. Similarly, the second bump 72 is shaped and sized to fit within the second via 62 and is electrically connected to the functional bridge through the second via 62. And bridging between adjacent second touch electrode blocks is realized. In this embodiment, the first protruding portion 71 and the second protruding portion 72 may be integrally formed with the second touch electrode block, so as to simplify the process steps.
In fig. 7B, the dummy bridge 56 is disposed on one surface of the insulating layer 32, and the first dummy electrode 471, the third dummy electrode 473, and the second dummy electrode 472 are disposed on the other surface of the insulating layer 32. The insulating layer 32 includes a first via 63 and a second via 64, which correspond to the first dummy electrode 471 and the second dummy electrode 472, respectively.
The first dummy electrode 471 and the second dummy electrode 472 are electrically connected to the dummy bridge 56 through the third via 63 and the fourth via 64. The insulating layer 32 can prevent the dummy bridge 56 from conducting with other metal layers in the touch panel. The first dummy electrode 471 and the second dummy electrode 472 have a third bump 73 and a fourth bump 74, respectively, and the third bump 73 is shaped and sized to fit the third via 63, and is electrically connected to the dummy bridge 56 through the third via 63. Similarly, the fourth bump 74 is shaped and sized to fit within the fourth via 64 and is electrically connected to the virtual bridge 56 through the fourth via 64. Further, bridging between the first dummy electrode 471 and the second dummy electrode 472 is achieved. In this embodiment, the third protruding portion 73 and the fourth protruding portion 74 may be integrally formed with the first virtual electrode 471 and the second virtual electrode 472, respectively, so as to simplify the process steps.
In an alternative embodiment, the virtual bridge 56 and the functional bridge 46 are located on the same layer, so that the existing film layer of the display panel is not required to be added, the thin design of the display panel is facilitated, and the process is simplified.
In another embodiment of fig. 3, a cross-sectional view in A-A direction is shown in fig. 7A, and a cross-sectional view in B-B direction is shown in fig. 7C, wherein the touch panel further includes a substrate 31 and an insulating layer 32. In fig. 7C, the dummy bridge 56 is disposed on one surface of the insulating layer 32, and the first dummy electrode 471, the third dummy electrode 473, and the second dummy electrode 472 are disposed on the other surface of the insulating layer 32. The dummy bridge 56 is spaced apart from the first dummy electrode 471 and the second dummy electrode 472 by the insulating layer 32. When static electricity exists in the touch panel, the insulating layer 32 is broken down, and the static electricity is discharged through the virtual bridge 56. In an alternative embodiment, the third protruding portion 73 and the fourth protruding portion 74 are not provided, and the dummy bridge 56 is located at a certain distance from both the first dummy electrode 471 and the second dummy electrode 472, and no electrical connection is achieved.
In the embodiment where the virtual bridge and the virtual electrode are not substantially electrically connected, the electrostatic discharge refers to charge transfer caused by the fact that objects having different electrostatic potentials are close to each other or in direct contact with each other, so that the electrostatic discharge may be generated only by sufficiently close distance when there is no electrical connection. Therefore, the electrostatic discharge with instant large current can be realized at one time when the static electricity is accumulated more, and the damage to functional bridging or the damage to the touch panel caused by the excessive instant current is avoided.
In an alternative embodiment, the diameters of the first via hole 61 and the second via hole 62 are respectively R1 and R2, the diameters of R1 and R2 are the same, the diameters of the third via hole 63 and the fourth via hole 64 are respectively R3 and R4, and optionally, the diameters of R3 and R4 are both larger than the diameters of R1 and R2, so that the virtual bridge 56 realizes the electrostatic discharge function in preference to the functional bridge 46 through the larger via hole, thereby protecting the touch panel and protecting the functional bridge 46 from electrostatic damage.
In alternative embodiments, the number of functional bridges 46 may be one, two or more, each in a stripe configuration, with multiple functional bridges being parallel in their stripe directions or having intersecting points. Referring to fig. 8, the plurality of functional bridges may be arranged perpendicular to the body connection portion 43 and parallel to each other. Referring to fig. 9, the single functional bridge may have an angle of between 0 and 90 degrees, preferably 45 degrees or 60 degrees, with the body connection 43 while being parallel to any virtual bridge. Referring to fig. 10, the plurality of functional bridges may all have an angle of between 0 and 90 degrees, preferably 45 degrees or 60 degrees or 120 degrees or 135 degrees with the body coupling portion 43, and the angles formed between the plurality of functional bridges are complementary.
In an alternative embodiment, with multiple virtual bridges, the more virtual bridges 56 are located closer to the functional bridge 46, the easier it is to share static electricity for the functional bridge 46, achieving better static electricity protection while avoiding damage to the functional bridge 46. The layout positions of the virtual bridges are limited because the layout positions of the touch electrodes in the touch panel are limited, and the layout positions of the virtual bridges are limited because static electricity of the touch panel is released in a probabilistic manner, so that the probability of sharing the static electricity is increased as the virtual bridges are increased, and four virtual bridges shown in fig. 8-11 are arranged around each functional bridge according to the layout of the touch panel and the principle of probabilistic sharing. Optionally, the distance between the virtual bridge and the functional bridge is equal to D5, the distance between each virtual bridge is equal to D6, and D5 and D6 are unequal, so that equidistant distribution between the virtual bridge and the functional bridge is realized, equidistant distribution between each virtual bridge is realized, uniform distribution of the virtual bridge in the whole touch panel is realized, the touch surface is kept consistent, and the whole optical display performance of the touch panel is not affected. Referring to fig. 8, 9, and 10, the plurality of virtual bridges 56 are mirror-symmetrical with respect to the first symmetry axis with respect to the X-direction as the first symmetry axis; the plurality of virtual bridges 56 are mirror-symmetrical with respect to the second axis of symmetry with respect to the Y-direction as the second axis of symmetry.
In alternative embodiments, the number of virtual bridges 56 may be one, two or more, with different shape configurations. In order to facilitate the process, most of the virtual bridge structures are the same, however, in the previous test, the virtual bridge is arranged at a position where the number of times of electrostatic discharge occurs or the number of static charge is greater, the width W2 of the strip structure is thinner, and the length L2 of the strip structure is longer, so that static discharge is performed when less static charge occurs through a tip effect, and damage to functional bridge or damage to the touch panel caused by more charge accumulation is avoided.
In alternative embodiments, the number of virtual bridges 56 may be one, two or more, each in a stripe configuration, with the virtual bridges 56 being parallel to or having intersecting points with the functional bridges 46 in their stripe direction. Different electrode structures reserve areas of different sizes and shapes for the virtual electrodes. Referring to fig. 11, each first touch electrode block of the first touch electrodes 42 has two sides parallel to the X-axis, and each second touch electrode block of the second touch electrodes 44 has two sides parallel to the Y-axis. A virtual electrode 47 having a rectangular area is provided between the first touch electrode block and the second touch electrode block, and opposite sides of the rectangular area are parallel to the X-axis and the Y-axis, respectively. A dummy bridge 56 is provided on the dummy electrode 47. The functional bridges 46 are shown as two, with an angle of between 0 and 90 degrees to the body connection 43, a single functional bridge 46 with an angle of between 0 and 90 degrees to the body connection 43 may also be used. Optionally, the plurality of virtual bridges 56 are not mirror-symmetrical with respect to the first symmetry axis with the X-direction as the first symmetry axis; the plurality of virtual bridges 56 are not mirror-symmetrical with respect to the second axis of symmetry with respect to the Y-direction as the second axis of symmetry. Optionally, the virtual bridge 56 and the functional bridge 46 are at the same angle to the first axis of symmetry. Optionally, the angles formed by the virtual bridges and the first symmetry axis are different. Alternatively, each virtual bridge 56 may be different in length and width. Therefore, virtual bridging with different angles, different lengths and widths can be set according to the predicted static electricity accumulation positions, thinner and longer bridging is adopted at the positions with more static electricity accumulation, and a better effect of releasing static electricity in real time is achieved.
In an alternative embodiment, referring to fig. 12, the dummy electrode 47 includes a first dummy electrode 471, a third dummy electrode 473, and a second dummy electrode 472 separated by two slits, and the dummy bridge 56 spans the third dummy electrode 473 and is electrically connected to the first dummy electrode 471 and the second dummy electrode 472. Referring to fig. 12, the two slits are not perpendicular to the strip direction of the virtual bridge 56, and form an angle of 0-90 degrees, preferably 45 degrees or 60 degrees. Therefore, the virtual bridge 56 has a structure similar to the functional bridge 46 in the extending direction of the slits, preferably, the slit direction of the virtual bridge 56 is parallel to the slit direction of the functional bridge 46, and the same structure makes it preferable to discharge the virtual bridge 56 when static electricity in the touch panel is accumulated between the electrodes, so as to avoid damaging the functional bridge 46 or the touch panel.
In an alternative embodiment, referring to fig. 12, the virtual bridge has a tip configuration with an angle of less than 90 degrees, preferably 45 degrees or 30 degrees. According to the point discharge principle, the sharper the conductor tip is, the larger the curvature is, the higher the surface charge density is, the stronger the field intensity is near the conductor tip, and compared with the part with small curvature, the part with large curvature is the tip, and the opposite charges are induced at the tip due to electrostatic induction, so that the virtual bridge is discharged in preference to the functional bridge.
In an alternative embodiment, referring to fig. 13, the touch panel further includes a virtual electrode layer 230 disposed around the touch area 220, and a ground layer (GU layer/GND layer) 240 disposed around the touch area 220. In the touch area, the virtual electrode 47B (shown in black in fig. 13) located at the outermost periphery of the touch area 220 has a different structure from the other virtual electrodes 47W (shown in white in fig. 13) located on the touch panel except for the outermost virtual electrode. The configuration shown in fig. 6B or fig. 7B (as described above) is adopted for the dummy electrode 47B, and the configuration shown in fig. 6C or fig. 7C (as described above) is adopted for the dummy electrode 47W. Therefore, when static electricity exists in the touch panel, at the virtual electrode 47W, the insulating layer 32 is broken down, and static electricity discharge is achieved through the virtual bridge 56, at the virtual electrode 47B, the first virtual electrode 471, the third virtual electrode 473 and the second virtual electrode 472 included in the virtual electrode 47B conduct the static electricity to the ground layer 240 through the virtual electrode layer 230, so that static electricity energy is further conducted to the ground while static electricity on the functional bridge is shared, compared with the case that static electricity is discharged through breakdown of the insulating layer, static electricity discharge is achieved more easily, the risk that the functional bridge is damaged is further reduced, and damage to the touch panel is avoided.
Fig. 14 is a schematic structural view of the cross section along the direction "C-C" in fig. 13, showing the virtual electrode layer 230, the insulating layer 231 and the ground layer 240, wherein the virtual electrode layer 230 is connected to the ground layer 240 through one or more vias 82, and the static electricity is more easily released by electrically connecting the first virtual electrode 471, the third virtual electrode 473 and the second virtual electrode 472 included in the virtual electrode 47B located at the outermost periphery of the touch area 220 with the virtual electrode layer 230 surrounding the touch area 220 and further connecting to the ground layer 240 through the vias 82, thereby realizing that when static electricity occurs at the outermost periphery of the touch panel, the static electricity is conducted to the ground layer 240 through the vias 82 by using the virtual electrode 47B, and the static electricity is more easily released than by breaking down the virtual electrode 47B through the insulating layer 32 to release the static electricity, thereby further reducing the risk of the functional bridge being damaged.
In an alternative embodiment, the touch panel further comprises a polarizer, which is assembled at the rear and is arranged above the functional bridge and above the virtual bridge in a covering manner.
Referring to fig. 15, a schematic diagram of a display device according to an embodiment of the present invention is provided, wherein the display device 1000 includes a touch panel 100, the touch panel 100 is a touch panel in any of the foregoing embodiments, and the display device 1000 may be a mobile phone or a folding display screen, a notebook computer, a television, a watch, an intelligent wearable display device, etc., which is not limited in this embodiment.
As can be seen from the above description, the touch panel 100 provided in this embodiment includes the first touch electrode 42, the second touch electrode 44, the functional bridge 46 and the virtual bridge 56, and the virtual bridge 56 protects the touch electrode and the functional bridge from static electricity, and ensures normal operation of the touch layer and the packaging element, thereby ensuring normal display function of the display panel. And moreover, the virtual bridge and the functional bridge are realized on the same layer, so that the structure is simple, the realization is easy, the electrostatic protection capability is improved, and other functions of the display panel are not influenced.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (13)
1. A touch panel, comprising:
the first touch electrode extends along a first direction, and comprises a plurality of first touch electrode blocks which are electrically connected through a body connecting part;
the second touch electrode extends along the second direction, the second touch electrode comprises a plurality of second touch electrode blocks, adjacent second touch electrode blocks are electrically connected through a functional bridge, the body connecting part is positioned between the adjacent second touch electrode blocks, and the functional bridge spans the body connecting part; the second direction intersects the first direction;
the virtual electrode is positioned between the first touch electrode block and the second touch electrode block, and a virtual bridge is arranged on the virtual electrode;
the dummy electrode includes a first dummy electrode, a third dummy electrode, and a second dummy electrode separated by a first slit;
the virtual bridge spans the third virtual electrode and is electrically connected with the first virtual electrode and the second virtual electrode.
2. The touch panel according to claim 1, wherein,
and a second notch is arranged between the second touch electrode block and the first touch electrode block, wherein the width of the second notch is equal to that of the first notch.
3. The touch panel according to claim 1, wherein,
the touch panel further comprises an insulating layer, wherein the insulating layer is formed on the upper surface of the first touch electrode and the upper surface of the virtual electrode, and a plurality of through holes are formed in the insulating layer;
the virtual bridge is electrically connected with the first virtual electrode and the second virtual electrode through a plurality of first through holes, and the functional bridge is electrically connected with a plurality of second touch electrodes through a plurality of second through holes.
4. The touch panel according to claim 3, wherein,
the diameter of the first via hole is larger than that of the second via hole.
5. The touch panel according to claim 1, wherein,
the virtual bridge is in a strip-shaped structure, the length of the virtual bridge is larger than that of the functional bridge, and/or the width of the virtual bridge is smaller than that of the functional bridge.
6. The touch panel according to claim 1, wherein,
the virtual bridge comprises a metal bridge, and the resistivity of the metal bridge is lower than that of a touch signal wire of the touch panel.
7. The touch panel according to claim 1, wherein,
taking the first direction as a first symmetry axis, and enabling the plurality of virtual bridges to be in mirror symmetry relative to the first symmetry axis;
and taking the second direction as a second symmetry axis, and enabling the plurality of virtual bridges to be in mirror symmetry relative to the second symmetry axis.
8. The touch panel according to claim 1, wherein,
the virtual bridge is a plurality of virtual bridges, and the shape of the virtual bridge is the same or the partial shape is different.
9. The touch panel according to claim 1, wherein,
the functional bridges are all in a strip-shaped structure, and the functional bridges are parallel or have crossing points in the strip-shaped direction.
10. The touch panel according to claim 1, wherein,
the virtual bridge is in a strip-shaped structure, and the virtual bridge is parallel to the functional bridge in the strip-shaped direction of the virtual bridge or has an intersection point in the strip-shaped direction of the functional bridge.
11. The touch panel of claim 1, further comprising:
the frame area is arranged outside the touch area;
the ground wire is positioned in the frame area;
the virtual bridge is electrically connected with the ground wire.
12. The touch panel of claim 1, further comprising:
and the polaroid is assembled at the back and is arranged above the functional bridge and above the virtual bridge in a covering manner.
13. A display device comprising the touch panel according to any one of claims 1 to 12.
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| CN113031810B (en) * | 2021-02-26 | 2022-12-06 | 武汉华星光电半导体显示技术有限公司 | Touch panel and display device |
| CN113126822B (en) | 2021-04-12 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | Touch display panel and display device |
| CN113504841B (en) * | 2021-05-25 | 2024-02-27 | 昆山国显光电有限公司 | Touch display panel and touch display device |
| CN114185461B (en) * | 2021-12-13 | 2023-09-22 | 昆山国显光电有限公司 | Touch panel, display panel and touch panel manufacturing method |
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