CN112416173A - Touch panel and touch display device - Google Patents
Touch panel and touch display device Download PDFInfo
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- CN112416173A CN112416173A CN202011341721.0A CN202011341721A CN112416173A CN 112416173 A CN112416173 A CN 112416173A CN 202011341721 A CN202011341721 A CN 202011341721A CN 112416173 A CN112416173 A CN 112416173A
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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
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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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- 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
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- 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
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
Abstract
The disclosure provides a touch panel including a first substrate, a plurality of first sensing electrodes, and a plurality of first ground electrodes. The first sensing electrodes are disposed on the first substrate and extend along a first direction. The first grounding electrodes are arranged on the first substrate and extend along the first direction, wherein the first grounding electrodes and the first sensing electrodes are parallel to each other and staggered, so that static electricity accumulated around the sensing electrodes in the environment or during operation is led out to the ground.
Description
Technical Field
The present disclosure relates to a touch panel and a touch display device thereof, and more particularly, to a touch panel with electrostatic protection capability and a touch display device thereof.
Background
Under the use condition of some medical or handheld products, some parts may generate high-frequency oscillation in use or environment, and electromagnetic wave interference may occur when the touch panel is matched, so that the touch panel is inaccurate in positioning or the vernier drifts. In addition, in some dry special environments, since the operator accumulates a lot of static charges on the body, the static charges will be discharged instantly when touching the touch panel, and if serious, the damage to the internal components of the system will be caused. Therefore, electrostatic discharge (ESD) is an important but not easily solved problem.
The solutions that are common today are, for example: the design of adding a conductive plating film with lower resistance on the lowest layer of the touch panel, adding a conductive film with lower resistance on the glass surface of the touch panel, and pasting a conductive adhesive tape or copper foil on the periphery of the touch panel or adding a dust core at the tail end is adopted.
However, the above-listed methods require additional processes, costs and man-hours in the manufacturing process, and thus the prior art needs to be improved.
Disclosure of Invention
One embodiment of the present disclosure is to provide a method for achieving electrostatic discharge protection.
One embodiment of the present disclosure provides a touch panel, which includes a second substrate, a plurality of first sensing electrodes, and a plurality of first ground electrodes. The first sensing electrodes are disposed on the first substrate and extend along a first direction. The first grounding electrodes are arranged on the first substrate and extend along the first direction, wherein the first grounding electrodes and the first sensing electrodes are parallel to each other and are staggered.
In some embodiments, a vertical projection of the first sensing electrodes on the first substrate does not overlap a vertical projection of the first ground electrodes on the first substrate.
In some embodiments, the touch panel further includes a plurality of first sensing lines electrically connected to the first sensing electrodes, respectively; and a plurality of first grounding wires electrically connected to the first grounding electrodes, respectively.
In some embodiments, the touch panel further includes a plurality of first dummy electrodes disposed on the first substrate, the first dummy electrodes being disposed between each of the first sensing electrodes and each of the first ground electrodes, respectively.
In some embodiments, the first substrate defines a touch area and a peripheral area, the peripheral area surrounds the touch area, a vertical projection of the first sensing electrodes on the first substrate, a vertical projection of the first ground electrodes on the first substrate, and a vertical projection of the first dummy electrodes on the first substrate do not overlap with each other, the first sensing electrodes, the first ground electrodes, and the first dummy electrodes are disposed in the touch area, and a first ground electrode and a first dummy electrode are disposed between two adjacent first sensing electrodes.
In some embodiments, each of the first dummy electrodes has a plurality of first dummy patterns surrounding the first ground electrode.
In some embodiments, the touch panel further includes a second substrate, a plurality of second sensing electrodes, and a plurality of second ground electrodes. The second substrate is disposed under the first substrate. The second sensing electrodes are disposed on the second substrate and extend along a second direction, wherein the second direction intersects the first direction. The second grounding electrodes are arranged on the second substrate and extend along the second direction, wherein the second grounding electrodes and the second sensing electrodes are parallel to each other and are staggered.
In some embodiments, the first substrate and the second substrate are disposed parallel to each other.
In some embodiments, a vertical projection of the second sensing electrodes on the second substrate does not overlap a vertical projection of the second ground electrodes on the second substrate.
In some embodiments, the touch panel further comprises: a plurality of second sensing lines electrically connected to the second sensing electrodes, respectively; and a plurality of second grounding wires electrically connected to the second grounding electrodes, respectively.
In some embodiments, the touch panel further includes a plurality of second dummy electrodes disposed on the second substrate, and the second dummy electrodes are disposed between the second sensing electrodes and the second ground electrodes, respectively.
In some embodiments, the second substrate defines a touch area and a peripheral area, the peripheral area surrounds the touch area, a vertical projection of the second sensing electrodes on the second substrate, a vertical projection of the second ground electrodes on the second substrate, and a vertical projection of the second dummy electrodes on the second substrate do not overlap with each other, the second sensing electrodes, the second ground electrodes, and the second dummy electrodes are disposed in the touch area, and a second ground electrode and a second dummy electrode are disposed between two adjacent second sensing electrodes.
In some embodiments, each of the second dummy electrodes has a plurality of second dummy patterns surrounding the second ground electrode.
In some embodiments, the touch panel further comprises: the plurality of second sensing electrodes are arranged below the first substrate and extend along a second direction, wherein the second direction is intersected with the first direction; and a plurality of second grounding electrodes arranged below the first substrate and extending along the second direction, wherein the second grounding electrodes and the second sensing electrodes are parallel to each other and are staggered.
In some embodiments, a vertical projection of the second sensing electrodes on the first substrate does not overlap a vertical projection of the second ground electrodes on the first substrate.
In some embodiments, the touch panel further includes a plurality of second dummy electrodes disposed under the first substrate, the second dummy electrodes being disposed between the second sensing electrodes and the second ground electrodes, respectively.
In some embodiments, the first substrate defines a touch area and a peripheral area, the peripheral area surrounds the touch area, wherein a vertical projection of the second sensing electrodes on the first substrate, a vertical projection of the second ground electrodes on the first substrate, and a vertical projection of the second dummy electrodes on the first substrate do not overlap with each other, the first sensing electrodes, the first ground electrodes, and the first dummy electrodes are disposed in the touch area, and a first ground electrode and a first dummy electrode are disposed between two adjacent first sensing electrodes.
In some embodiments, the touch panel further includes a plurality of second sensing lines electrically connected to the second sensing electrodes, respectively; and a plurality of second grounding wires electrically connected to the second grounding electrodes, respectively.
In some embodiments, each of the second dummy electrodes has a plurality of second dummy patterns surrounding the second ground electrode.
Another embodiment of the present disclosure provides a touch display device, which includes the touch panel as described above.
Drawings
Various aspects of the disclosure will be best understood when the following detailed description is read with reference to the accompanying drawings. It should be noted that the various features may not be drawn to scale in accordance with industry standard practice. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the following description is given:
fig. 1 is a schematic diagram of a touch panel according to some embodiments of the disclosure.
FIG. 2 is a partial cross-sectional view taken at line 2-2 of FIG. 1.
Fig. 3 is a schematic view of a touch panel according to another embodiment of the disclosure.
Fig. 4 is a partial cross-sectional view at line 4-4 of fig. 3.
Fig. 5 is a top view of a touch panel according to another embodiment of the disclosure.
Fig. 6 is a partial cross-sectional view at line 6-6 of fig. 5.
FIG. 7 is a partial cross-sectional view of a touch panel according to another embodiment of the present disclosure, the cross-sectional view being taken along line 6-6 of FIG. 5.
Reference numerals:
10. 10': the touch panel 110: first substrate
110A: touch area 110B: peripheral zone
120: first sensing electrode 130: first ground electrode
140: first sensing line 150: first grounding wire
160: first dummy electrode 162: a first dummy pattern
210: second substrates 220, 220': second sensing electrode
230. 230': second ground electrode 240: second sensing line
250: second ground lines 260, 260': a second dummy electrode
262. 262': second dummy pattern 300: adhesive layer
D1: first direction D2: second direction
Detailed Description
To make the disclosure more complete and complete, the following description is given of illustrative aspects and embodiments of the invention, but this is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The various embodiments disclosed below may be combined with or substituted for one another where appropriate, and additional embodiments may be added to one embodiment without further recitation or description. In the following description, numerous specific details are set forth to provide a thorough understanding of the following embodiments. However, embodiments of the invention may be practiced without these specific details.
Spatially relative terms, such as "lower" and "upper," are used herein to describe one element or feature's relationship to another element or feature in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In this document, unless the context requires otherwise, the word "a" and "an" may mean "one" or "more". It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood that the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or blocks. These elements, components, regions, layers and/or regions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present disclosure. As used herein, the word "and/or" includes any combination of one or more of the associated listed items. Reference to "and/or" in this document refers to any one, all, or any combination of at least one of the listed elements.
The touch panel of the present disclosure will be described in more detail by referring to several examples and experimental examples, which are only for illustrative purposes and are not intended to limit the scope of the present disclosure, which is defined by the claims below. Features and elements that are well known in the art and are not necessary for an understanding of the principles described will be omitted for clarity.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram illustrating a touch panel according to some embodiments of the present disclosure, and fig. 2 is a partial cross-sectional view taken along line 2-2 in fig. 1. A touch panel 10 includes a first substrate 110, a plurality of first sensing electrodes 120, a plurality of first ground electrodes 130, a plurality of first sensing lines 140, and a plurality of first ground lines 150.
The first substrate 110 defines a touch area 110A and a peripheral area 110B, and the peripheral area 110B surrounds the touch area 110A. The first substrate 110 includes a hard material or a soft material including, but not limited to, glass or polyethylene terephthalate (PET), Cyclo Olefin Polymer (COP), triacetyl cellulose (TAC), Polyimide (PI), Polycarbonate (PC), hydrophilic polyvinylidene fluoride (H-PVDF), or a combination thereof.
The first sensing electrodes 120 are disposed on the first substrate 110 and extend along the first direction D1. In one embodiment, the first direction D1 may be an X-axis direction or a Y-axis direction. In some embodiments, the material of the first sensing electrode 120 includes, but is not limited to, gold, Silver, copper, aluminum, Indium Tin Oxide (ITO), Silver Nanowire (AgNW), Poly (3,4-ethylenedioxythiophene) (Poly (3,4-ethylenedioxythiophene), PEDOT), Carbon Nanotube (CNT), Silver Nanowire (AgNW), polyvinylidene fluoride (PVDF), transferable Conductive Film (TCTF), or a combination thereof.
The first ground electrodes 130 are disposed on the first substrate 110 and extend along the first direction D1. In one embodiment, the first ground electrodes 130 are not connected to the first sensing electrodes 120, and are parallel to each other and staggered. Specifically, the first sensing electrode 120, the first ground electrode 130, the first sensing electrode 120, and so on are arranged in order on the first substrate 110. In one embodiment, the first substrate 110 has two ends respectively serving as the first sensing electrodes 120, and the first grounding electrode 130 and the first sensing electrodes 120 are sequentially inserted therebetween, so as to guide charges accumulated in the upper cover glass (not shown) and the first sensing electrodes 120 to ground. In one embodiment, the vertical projection of the first sensing electrodes 120 on the first substrate 110 is not overlapped with the vertical projection of the first ground electrodes 130 on the first substrate 110, so as to avoid affecting the touch signal. In one embodiment, the material of the first ground electrode 130 includes, but is not limited to, gold, Silver, copper, aluminum, Indium Tin Oxide (ITO), Silver Nanowire (AgNW), Poly (3,4-ethylenedioxythiophene) (Poly (3,4-ethylenedioxythiophene), PEDOT), Carbon Nanotube (CNT), Silver Nanowire (AgNW), polyvinylidene fluoride (PVDF), transferable Transparent Conductive Film (TCTF), or a combination thereof. In an embodiment, the material of the first ground electrode 130 may be the same as the first sensing electrode 120.
The first sensing lines 140 are electrically connected to the first sensing electrodes 120, respectively, for transmitting touch signals to a circuit board (not shown). In one embodiment, one end of each first sensing electrode 120 is electrically connected to each first sensing line 140. In an embodiment, the material of the first sensing lines 140 may be the same as or different from the first sensing electrodes 120.
The first grounding lines 150 are electrically connected to the first grounding electrodes 130 to lead static electricity accumulated around the first sensing electrodes 120 in the environment or during operation out to the ground. In one embodiment, one end of each first ground electrode 130 is electrically connected to each first ground line 150. In one embodiment, in a portion of the first ground electrodes 130, one end of each of the first ground electrodes 130 is electrically connected to one of the first ground lines 150; in another portion of the first ground electrodes 130, one end of each first ground electrode 130 is electrically connected to another first ground line 150. In one embodiment, the material of the first ground lines 150 may be the same as or different from the first ground electrode 130. In one embodiment, the first sensing lines 140 and the first grounding lines 150 are located in the peripheral region 110B.
Referring to fig. 3 and 4, fig. 3 is a schematic diagram illustrating a touch panel according to another embodiment of the disclosure, and fig. 4 is a partial cross-sectional view taken along line 4-4 in fig. 3. The difference between the touch panel 10 of fig. 1 and the touch panel 2 of fig. 2 is that the touch panel 10 further includes a plurality of first dummy electrodes 160 to prevent the electrodes from being detected by naked eyes. The first dummy electrodes 160 are disposed on the first substrate 110, and the first dummy electrodes 160 are disposed between the first sensing electrodes 120 and the first ground electrodes 130, respectively, to lead out the accumulated charges of the floating voltage in the first dummy electrodes 160 to ground. In one embodiment, the vertical projection of the first sensing electrodes 120 on the first substrate 110, the vertical projection of the first ground electrodes 130 on the first substrate 110, and the vertical projection of the first dummy electrodes 160 on the first substrate 110 are not overlapped with each other, so as to avoid affecting the touch signal. In one embodiment, each of the first dummy electrodes 160 has a line width of about 5 μm to about 3mm, for example: 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 250 μm, 500 μm, 750 μm, 1000 μm, 1500 μm, 2000 μm, 2500 μm, or any value between any two of these equivalents. In one embodiment, each of the first dummy electrodes 160 has a plurality of first dummy patterns 162, and the first dummy patterns 162 are not connected to each other. In one embodiment, the plurality of first dummy patterns 162 surround the first ground electrode 130. In one embodiment, the first sensing electrodes 120, the first ground electrodes 130, and the first dummy electrodes 160 are disposed in the touch area 110A. In one embodiment, one first ground electrode 130 and one first dummy electrode 160 are disposed between two adjacent first sensing electrodes 120; or a first dummy electrode 160, a first ground electrode 130 and a first dummy electrode 160.
Referring to fig. 5 and 6, fig. 5 is a top view of a touch panel according to another embodiment of the disclosure, and fig. 6 is a partial cross-sectional view taken along line 6-6 in fig. 5. The present disclosure further provides a touch panel 10' further including a second substrate 210, a plurality of second sensing electrodes 220, a plurality of second ground electrodes 230, a plurality of second sensing lines 240, and a plurality of second ground lines 250.
The second substrate 210 is disposed under the first substrate 110. In one embodiment, the second substrate 210 defines a touch region 110A and a peripheral region 110B, and the peripheral region 110B surrounds the touch region 110A. In one embodiment, the second substrates 210 are disposed below the first substrate 110 and are parallel to each other. In some embodiments, when the second substrate 210 is disposed below the first substrate 110 and disposed parallel to each other, the touch area 110A and the peripheral area 110B defined by the first substrate 110 and the second substrate have the same range, for example, when the first substrate 110 is vertically projected onto the second substrate 210, the touch area 110A and the peripheral area 110B defined by the first substrate 110 and the second substrate overlap. In an embodiment, the second substrate 210 comprises a hard material or a soft material similar to the first substrate 110, and is not described herein again.
The second sensing electrodes 220 are disposed on the second substrate 210 and extend along a second direction D2, wherein the second direction D2 intersects the first direction D1. In one embodiment, the first direction D1 may be a Y-axis direction, and the second direction D2 may be an X-axis direction; alternatively, the first direction D1 may be the X-axis direction, and the second direction D2 is the Y-axis direction, so that the second direction D2 is perpendicular to the first direction D1. In some embodiments, the material of the second sensing electrode 220 is similar to that of the first sensing electrode 120, and is not repeated herein.
The second ground electrodes 230 are disposed on the second substrate 210 and extend along the second direction D2. In one embodiment, the second ground electrodes 230 are not connected to the second sensing electrodes 220, and are parallel to each other and staggered. Specifically, the second sensing electrode 220, the second grounding electrode 230, the second sensing electrode 220 and so on are arranged in sequence on the second substrate 210. In one embodiment, the second substrate 210 has two ends respectively serving as the second sensing electrodes 220, and a second ground electrode 230 and the second sensing electrodes 220 are sequentially inserted therebetween. In one embodiment, the vertical projection of the second sensing electrodes 220 on the second substrate 210 is not overlapped with the vertical projection of the second ground electrodes 230 on the second substrate 210, so as to avoid affecting the touch signal. In one embodiment, the material of the second ground electrode 230 is similar to that of the first ground electrode 130, and is not described herein again. In an embodiment, the second ground electrode 230 may be the same material as the second sensing electrode 220.
The second sensing lines 240 are electrically connected to the second sensing electrodes 220, respectively, for transmitting touch signals to a circuit board (not shown). In one embodiment, one end of each second sensing electrode 220 is electrically connected to each second sensing line 240. In one embodiment, the material of the second sensing lines 240 may be the same as or different from the second ground electrode 230.
In fig. 5, for simplicity, only a part of the second ground line 250 is shown, and the other part is not shown; only a portion of the first ground line 150 is shown, and the other portion is not shown. The second grounding lines 250 are electrically connected to the second grounding electrodes 230 to lead static electricity accumulated around the second sensing electrode 220 in the environment or during operation out to the ground. In one embodiment, one end of each second ground electrode 230 is electrically connected to each second ground line 250. In one embodiment, in a portion of the second ground electrodes 230, one end of each second ground electrode 230 is electrically connected to one of the second ground lines 250; in another portion of the second ground electrodes 230, one end of each second ground electrode 230 is electrically connected to another second ground line 250. In one embodiment, the material of the second ground lines 250 may be the same as or different from the second ground electrode 230. In one embodiment, the second sensing lines 240 and the second grounding lines 250 are located in the peripheral region 110B.
In some embodiments, the present disclosure further comprises a plurality of second dummy electrodes 260 to prevent the electrodes from being detected by naked eyes. The second dummy electrodes 260 are disposed on the second substrate 210, and the second dummy electrodes 260 are disposed between the second sensing electrodes 220 and the second ground electrodes 230, respectively. In one embodiment, the vertical projection of the second sensing electrodes 220 on the second substrate 210, the vertical projection of the second ground electrodes 230 on the second substrate 210, and the vertical projection of the second dummy electrodes 260 on the second substrate 210 are not overlapped with each other, so as to avoid affecting the touch signal. In one embodiment, each of the second dummy electrodes 260 has a line width of about 5 μm to about 3mm, for example: 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 250 μm, 500 μm, 750 μm, 1000 μm, 1500 μm, 2000 μm, 2500 μm, or any value between any two of these equivalents. In one embodiment, each of the second dummy electrodes 260 has a plurality of second dummy patterns 262, and the second dummy patterns 262 are not connected to each other. In one embodiment, the plurality of second dummy patterns 262 surround the second ground electrode 230. In one embodiment, the second sensing electrodes 220, the second ground electrodes 230, and the second dummy electrodes 260 are disposed in the touch area 110A. In one embodiment, one second ground electrode 230 and one second dummy electrode 260 are disposed between two adjacent second sensing electrodes 220; or a second dummy electrode 260, a second ground electrode 230 and a second dummy electrode 260.
Referring to fig. 7, fig. 7 is a partial cross-sectional view of a touch panel according to another embodiment of the disclosure, the cross-sectional view being taken along line 6-6 of fig. 5. Fig. 7 is different from fig. 6 in that a plurality of second sensing electrodes 220 ', a plurality of second ground electrodes 230 ', and a plurality of second dummy electrodes 260 ' are disposed under the first substrate 110, and the portions related to the vertical projection are projected onto the first substrate 110 instead, and the rest are similar to fig. 5 and 6, and thus are not repeated. That is, on the opposite surfaces of the first substrate 110, one surface is disposed with a plurality of first sensing electrodes 120, a plurality of first ground electrodes 130, and a plurality of first dummy electrodes 160 (see fig. 4), and the other surface is disposed with a plurality of second sensing electrodes 220 ', a plurality of second ground electrodes 230 ', and a plurality of second dummy electrodes 260 '.
In some embodiments, the touch panel of the present disclosure may be provided with only the first dummy electrode 160 and not the second dummy electrode 260/260', so that the electrodes are not easily found visually.
In some embodiments, the method for manufacturing the touch panel 10 of the present disclosure includes providing a first substrate 110, and disposing a first conductive layer on the first substrate 110. The first conductive layer is then formed by a process to form the first sensing electrode 120, the first ground electrode 130 and/or the first dummy electrode 160 arranged in parallel with each other. The forming method includes, but is not limited to, exposure, stamping, printing, laser etching, etching paste, etc. The concept of this design is to insert a ground line (ground electrode) into the dummy electrode area (dummy pattern area) between the original sensing electrodes when the dummy electrode is formed. Meanwhile, the grounding electrode is directly connected with the grounding wire to perform the grounding action so as to lead the static electricity accumulated between the sensing electrodes in the environment or during operation.
In other embodiments, the method for manufacturing the touch panel 10' of the present disclosure includes providing a second substrate 210, and disposing a second conductive layer on the second substrate 210. The second conductive layer is then formed by a process to form the second sensing electrode 220, the second ground electrode 230 and/or the second dummy electrode 260 arranged in parallel. The forming method includes, but is not limited to, exposure, stamping, printing, laser etching, etching paste, etc. The concept of this design is to insert a ground wire (ground electrode) into the dummy electrode region between the original sensing electrodes when the dummy electrode is formed. Then, the first substrate 110 on which the first sensing electrode 120, the first ground electrode 130 and/or the first dummy electrode 160 are formed is bonded to cover the second sensing electrode 220, the second ground electrode 230 and/or the second dummy electrode 260 with an adhesive layer 300. In some embodiments, the material of the adhesive layer 300 may be, for example, Optical Clear Adhesive (OCA), liquid Optical Clear Resin (OCR), or a combination thereof.
Some embodiments of the present disclosure disclose a touch panel, which has the following advantages: 1. by staggering the grounding electrodes and the sensing electrodes, static electricity accumulated around the sensing electrodes in the environment or during operation is conducted to the ground. In addition, under the framework of the sensing electrode and the dummy electrode, the grounding electrode is arranged in the dummy electrode and connected with the grounding wire, and static charges are led out. 2. During the operation, if static electricity is accumulated between the sensing electrode, the dummy electrode and the glass surface, a false signal may occur during the operation. In this case, the electrostatic accumulation can be conducted by the grounding electrode of the present disclosure. 3. The ground electrode of the present disclosure is disposed only by adding the ground electrode configuration during the design of the dummy electrode, without increasing the number of processes and materials, so as to reduce the manufacturing cost. 4. The ground electrode arrangement of the present disclosure may be applied to similar capacitive architecture applications.
While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (20)
1. A touch panel, comprising:
a first substrate;
a plurality of first sensing electrodes disposed on the first substrate and extending along a first direction; and
the plurality of first grounding electrodes are arranged on the first substrate and extend along the first direction, wherein the first grounding electrodes and the first sensing electrodes are parallel to each other and are staggered.
2. The touch panel of claim 1, wherein a vertical projection of the first sensing electrode on the first substrate does not overlap a vertical projection of the first ground electrode on the first substrate.
3. The touch panel of claim 1, further comprising:
a plurality of first sensing lines electrically connected to the first sensing electrodes, respectively; and
and the plurality of first grounding wires are respectively and electrically connected with the first grounding electrode.
4. The touch panel of claim 1, further comprising a plurality of first dummy electrodes disposed on the first substrate, the first dummy electrodes being disposed between each of the first sensing electrodes and each of the first ground electrodes, respectively.
5. The touch panel of claim 4, wherein the first substrate defines a touch area and a peripheral area surrounding the touch area,
the vertical projection of the first sensing electrode on the first substrate, the vertical projection of the first grounding electrode on the first substrate, and the vertical projection of the first dummy electrode on the first substrate do not overlap with each other, the first sensing electrode, the first grounding electrode, and the first dummy electrode are disposed in the touch area, and one first grounding electrode and one first dummy electrode are disposed between two adjacent first sensing electrodes.
6. The touch panel of claim 4, wherein each of the first dummy electrodes has a plurality of first dummy patterns surrounding the first ground electrode.
7. The touch panel of claim 1, further comprising:
a second substrate disposed under the first substrate;
a plurality of second sensing electrodes disposed on the second substrate and extending along a second direction, wherein the second direction intersects the first direction; and
and a plurality of second ground electrodes disposed on the second substrate and extending along the second direction, wherein the second ground electrodes and the second sensing electrodes are parallel to each other and are staggered.
8. The touch panel of claim 7, wherein the first substrate and the second substrate are disposed parallel to each other.
9. The touch panel of claim 7, wherein a vertical projection of the second sensing electrode on the second substrate does not overlap a vertical projection of the second ground electrode on the second substrate.
10. The touch panel of claim 7, further comprising:
a plurality of second sensing lines electrically connected to the second sensing electrodes, respectively; and
and the plurality of second grounding wires are respectively and electrically connected with the second grounding electrodes.
11. The touch panel of claim 7, further comprising a plurality of second dummy electrodes disposed on the second substrate, the second dummy electrodes being disposed between each of the second sensing electrodes and each of the second ground electrodes, respectively.
12. The touch panel of claim 11, wherein the second substrate defines a touch area and a peripheral area surrounding the touch area,
the vertical projection of the second sensing electrode on the second substrate, the vertical projection of the second grounding electrode on the second substrate, and the vertical projection of the second dummy electrode on the second substrate do not overlap with each other, the second sensing electrode, the second grounding electrode, and the second dummy electrode are disposed in the touch area, and one second grounding electrode and one second dummy electrode are disposed between two adjacent second sensing electrodes.
13. The touch panel of claim 11, wherein each of the second dummy electrodes has a plurality of second dummy patterns surrounding the second ground electrode.
14. The touch panel of claim 1, further comprising:
a plurality of second sensing electrodes disposed under the first substrate and extending along a second direction, wherein the second direction intersects the first direction; and
and a plurality of second grounding electrodes arranged below the first substrate and extending along the second direction, wherein the second grounding electrodes and the second sensing electrodes are parallel to each other and are staggered.
15. The touch panel of claim 14, wherein a vertical projection of the second sensing electrode on the first substrate does not overlap a vertical projection of the second ground electrode on the first substrate.
16. The touch panel of claim 14, further comprising a plurality of second dummy electrodes disposed under the first substrate, the second dummy electrodes being disposed between each of the second sensing electrodes and each of the second ground electrodes, respectively.
17. The touch panel of claim 16, wherein the first substrate defines a touch area and a peripheral area surrounding the touch area,
the vertical projection of the second sensing electrode on the first substrate, the vertical projection of the second grounding electrode on the first substrate, and the vertical projection of the second dummy electrode on the first substrate do not overlap with each other, the first sensing electrode, the first grounding electrode, and the first dummy electrode are disposed in the touch area, and one first grounding electrode and one first dummy electrode are disposed between two adjacent first sensing electrodes.
18. The touch panel of claim 14, further comprising:
a plurality of second sensing lines electrically connected to the second sensing electrodes, respectively; and
and the plurality of second grounding wires are respectively and electrically connected with the second grounding electrodes.
19. The touch panel of claim 14, wherein each of the second dummy electrodes has a plurality of second dummy patterns surrounding the second ground electrode.
20. A touch display device comprising the touch panel according to claim 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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- 2020-11-27 TW TW109141882A patent/TWI754472B/en active
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| US20020171634A1 (en) * | 1998-12-18 | 2002-11-21 | Hideto Matsufusa | Data input device using a laminated substrate capable of reliably filling through holes with electroconductive material |
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| Publication number | Publication date |
|---|---|
| TW202221479A (en) | 2022-06-01 |
| TWI754472B (en) | 2022-02-01 |
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